{"id":2632,"date":"2021-06-01T09:43:33","date_gmt":"2021-06-01T09:43:33","guid":{"rendered":"https:\/\/hqeialdi5a.wpdns.site\/?p=2632"},"modified":"2024-02-02T06:32:04","modified_gmt":"2024-02-02T06:32:04","slug":"9-questions-hydraulic-pump-parameter-calculation","status":"publish","type":"post","link":"https:\/\/yaiwo.com\/pt\/9-questions-hydraulic-pump-parameter-calculation\/","title":{"rendered":"9 perguntas sobre o c\u00e1lculo dos par\u00e2metros da bomba hidr\u00e1ulica que voc\u00ea deve saber"},"content":{"rendered":"<p class=\"yoast-reading-time__wrapper\"><span class=\"yoast-reading-time__icon\"><\/span><span class=\"yoast-reading-time__descriptive-text\">Tempo estimado de leitura:  <\/span><span class=\"yoast-reading-time__reading-time\">24<\/span><span class=\"yoast-reading-time__time-unit\"> minutos<\/span><\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-selection-of-hydraulic-pump\"><strong>Sele\u00e7\u00e3o de bomba hidr\u00e1ulica<\/strong><\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">o <a href=\"https:\/\/www.youtube.com\/watch?v=kP6gNQ700UM\" target=\"_blank\" rel=\"noopener\">bomba hidr\u00e1ulica<\/a> \u00e9 um dispositivo de convers\u00e3o de energia, que converte a energia mec\u00e2nica do motor de acionamento em energia de press\u00e3o do \u00f3leo para atender \u00e0s necessidades do atuador para acionar a carga externa.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-1-hydraulic-pump-performance\"><strong>Pergunta 1: Desempenho da bomba hidr\u00e1ulica<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Os principais desempenhos das bombas hidr\u00e1ulicas comumente usadas s\u00e3o mostrados na Tabela.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">atua\u00e7\u00e3o<\/td><td class=\"has-text-align-center\" data-align=\"center\">Bomba de engrenagem externa<\/td><td class=\"has-text-align-center\" data-align=\"center\">Bomba de palhetas de dupla a\u00e7\u00e3o<\/td><td class=\"has-text-align-center\" data-align=\"center\">Bomba de palhetas vari\u00e1vel limitadora de press\u00e3o<\/td><td class=\"has-text-align-center\" data-align=\"center\">Bomba de pist\u00e3o radial<\/td><td class=\"has-text-align-center\" data-align=\"center\">Bomba de pist\u00e3o axial<\/td><td class=\"has-text-align-center\" data-align=\"center\">Bomba de parafuso<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Press\u00e3o de sa\u00edda<\/td><td class=\"has-text-align-center\" data-align=\"center\">Press\u00e3o baixa<\/td><td class=\"has-text-align-center\" data-align=\"center\">Press\u00e3o m\u00e9dia<\/td><td class=\"has-text-align-center\" data-align=\"center\">Press\u00e3o m\u00e9dia<\/td><td class=\"has-text-align-center\" data-align=\"center\">Alta press\u00e3o<\/td><td class=\"has-text-align-center\" data-align=\"center\">Alta press\u00e3o<\/td><td class=\"has-text-align-center\" data-align=\"center\">Press\u00e3o baixa<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Regula\u00e7\u00e3o de fluxo<\/td><td class=\"has-text-align-center\" data-align=\"center\">N\u00e3o<\/td><td class=\"has-text-align-center\" data-align=\"center\">N\u00e3o <\/td><td class=\"has-text-align-center\" data-align=\"center\">N\u00e3o<\/td><td class=\"has-text-align-center\" data-align=\"center\">sim<\/td><td class=\"has-text-align-center\" data-align=\"center\">sim<\/td><td class=\"has-text-align-center\" data-align=\"center\">N\u00e3o<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Efic\u00e1cia<\/td><td class=\"has-text-align-center\" data-align=\"center\">Baixo<\/td><td class=\"has-text-align-center\" data-align=\"center\">Superior<\/td><td class=\"has-text-align-center\" data-align=\"center\">Superior<\/td><td class=\"has-text-align-center\" data-align=\"center\">Alto<\/td><td class=\"has-text-align-center\" data-align=\"center\">Alto <\/td><td class=\"has-text-align-center\" data-align=\"center\">Superior<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Pulsa\u00e7\u00e3o do fluxo de sa\u00edda<\/td><td class=\"has-text-align-center\" data-align=\"center\">Muito grande<\/td><td class=\"has-text-align-center\" data-align=\"center\">O menor<\/td><td class=\"has-text-align-center\" data-align=\"center\">Em geral<\/td><td class=\"has-text-align-center\" data-align=\"center\">Em geral<\/td><td class=\"has-text-align-center\" data-align=\"center\">Em geral<\/td><td class=\"has-text-align-center\" data-align=\"center\">O menor<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Caracter\u00edsticas de auto-escorvamento<\/td><td class=\"has-text-align-center\" data-align=\"center\">Boa <\/td><td class=\"has-text-align-center\" data-align=\"center\">Relativamente pobre<\/td><td class=\"has-text-align-center\" data-align=\"center\">Relativamente pobre<\/td><td class=\"has-text-align-center\" data-align=\"center\"><\/td><td class=\"has-text-align-center\" data-align=\"center\">Pobre<\/td><td class=\"has-text-align-center\" data-align=\"center\">Boa<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-2-selection-of-hydraulic-pump-type\"><strong>Pergunta 2: Sele\u00e7\u00e3o do tipo de bomba hidr\u00e1ulica<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"452\" height=\"274\" src=\"https:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2.jpg\" alt=\"Hydraulic Pump Parameter\" class=\"wd-lazy-fade wp-image-2646\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2.jpg 452w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2-300x182.jpg 300w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2-150x91.jpg 150w\" sizes=\"(max-width: 452px) 100vw, 452px\" \/><figcaption><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The principle of selecting the hydraulic pump is: according to the working condition of the main engine, the size of the power and the performance requirements of the system, first determine the type of the hydraulic pump, and then determine its specification and model according to the pressure and flow required by the system. Hydraulic Pump Parameter<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Para sistemas hidr\u00e1ulicos de m\u00e1quinas-ferramenta em geral, palheta de dupla a\u00e7\u00e3o<a href=\"https:\/\/yaiwo.com\/pt\/introduction-of-hydraulic-pump\/\"> bombas<\/a>,\u00a0and pressure-limiting variable vane pumps are often used; while road construction machinery, port machinery,\u00a0and small construction machinery, gear pumps with strong anti-pollution capabilities are often selected; In occasions, plunger pumps are often chosen. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>Pay attention to whether the flow of the hydraulic pump is adjustable. Generally speaking, if the hydraulic power is less than 10kW, the working cycle is on-off, the hydraulic pump can be completely unloaded when not in use, and the hydraulic pump is required to output full flow under most working conditions, you can consider using a fixed pump; if the hydraulic power If the flow rate is larger than 10KW, the variable pump can be considered. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>Pay attention to parallel pumps and series pumps. Gear pumps and vane pumps can also be made into several pumps connected in parallel, and use a double pump or triple pump with the same drive shaft, or can be connected in series to form a multi-stage pump. When the hydraulic system-the flow rate changes greatly within a working cycle, multiple pumps can be used. Multiple pumps usually have one oil suction port and multiple oil outlets. The pressure oil from each oil outlet can supply oil to different actuators of the system, or can be combined to supply a certain actuator. Hydraulic Pump Parameter<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-the-hydraulic-pump-parameter-calculation\"><strong>O c\u00e1lculo do par\u00e2metro da bomba hidr\u00e1ulica<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-1-calculate-the-maximum-working-pressure-of-the-hydraulic-pump\"><strong>Pergunta 1: Calcule a press\u00e3o m\u00e1xima de trabalho da bomba hidr\u00e1ulica<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A press\u00e3o m\u00e1xima de trabalho P<sub>p<\/sub>&nbsp;da bomba hidr\u00e1ulica depende da press\u00e3o m\u00e1xima de trabalho do atuador (cilindro hidr\u00e1ulico ou motor hidr\u00e1ulico), nomeadamente<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">P<sub>p<\/sub>\u2265P<sub>1<\/sub>+ \u2211 \u25b3 p<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-2-calculate-the-maximum-flow-rate-of-the-hydraulic-pump\"><strong>Pergunta 2: Calcule a vaz\u00e3o m\u00e1xima da bomba hidr\u00e1ulica<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">O fluxo m\u00e1ximo q<sub>p<\/sub>\u00a0(m<sup>3<\/sup>\/ s) da bomba hidr\u00e1ulica principal depende do fluxo q<sub>v<\/sub>\u00a0required by the system. Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Para um sistema onde v\u00e1rios cilindros hidr\u00e1ulicos ou motores hidr\u00e1ulicos atuam ao mesmo tempo, a taxa de fluxo m\u00e1xima da bomba hidr\u00e1ulica deve ser<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">q<sub>p<\/sub>\u2265q<sub>v<\/sub>\uff1d K (\u2211q) max &nbsp;<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-3-calculation-of-small-pump-flow-when-calculating-double-pump-oil-supply\"><strong>Pergunta 3: C\u00e1lculo do fluxo da bomba pequena ao calcular o suprimento de \u00f3leo da bomba dupla<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">If the oil supply of the hydraulic pump is selected according to the working conditions (for example, when two pumps are used for oil supply, the small flow pump supplies the flow of the working conditions), the minimum overflow of the overflow valve should also be considered when calculating the oil supply. Hydraulic Pump Parameter<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-4-select-the-rated-pressure-of-the-hydraulic-pump-to-determine\"><strong>Pergunta 4: Selecione a press\u00e3o nominal da bomba hidr\u00e1ulica para determinar<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"400\" height=\"400\" src=\"https:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1.2-1.jpg\" alt=\"bomba hidr\u00e1ulica\" class=\"wd-lazy-fade wp-image-2648\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1.2-1.jpg 400w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1.2-1-300x300.jpg 300w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1.2-1-150x150.jpg 150w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1.2-1-12x12.jpg 12w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><figcaption><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The pressure of the hydraulic pump obtained by the above calculation is the static pressure of the system. In the dynamic working process of the system, the dynamic pressure of the system far exceeds the static pressure due to pressure overshoot or periodic pressure pulsation during the transition process. Therefore, when selecting a hydraulic pump, the rated pressure of the hydraulic pump should be 25%~60% higher than the maximum calculated pressure of the system (a high-pressure system takes a small value, medium and\u00a0the low-pressure system takes the larger value) so that the hydraulic pump has a certain pressure reserve. Hydraulic Pump Parameter<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Generally speaking, in fixed equipment, the rated pressure of the hydraulic pump should be about 25% higher than the normal working pressure, and the rated pressure of the hydraulic pump for vehicles should be about 45% higher than the normal working pressure to ensure the pump has a sufficient life. If the reliability requirements of the hydraulic system are particularly high, the rated working pressure of the hydraulic pump can be selected higher. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>If the hydraulic system only requires the supply of high-pressure and small-flow working medium in a short period, the maximum working pressure of the hydraulic pump can be selected smaller at this time (when selecting a hydraulic pump, it is not advisable to reduce the specifications of the large-capacity hydraulic pump. It is because when the working pressure and working flow of the hydraulic pump are less than its rated value, the overall efficiency of the hydraulic pump will decrease). Hydraulic Pump Parameter<\/li>\n\n\n\n<li>The highest working pressure on the sample is the allowable pressure during short-term impact. Do not have impact pressure in every cycle, otherwise,\u00a0the life of the hydraulic pump will be significantly shortened or even damaged. Hydraulic Pump Parameter<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-5-select-the-rated-flow-of-the-hydraulic-pump-to-determine\"><strong>Pergunta 5: Selecione o fluxo nominal da bomba hidr\u00e1ulica para determinar<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"404\" height=\"265\" src=\"https:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1.png\" alt=\"bomba hidr\u00e1ulica\" class=\"wd-lazy-fade wp-image-2652\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1.png 404w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-300x197.png 300w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-18x12.png 18w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-150x98.png 150w\" sizes=\"(max-width: 404px) 100vw, 404px\" \/><figcaption><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Quanto \u00e0 vaz\u00e3o da bomba hidr\u00e1ulica, a vaz\u00e3o m\u00e1xima exigida pelo sistema pode ser selecionada ao selecionar e n\u00e3o deve exceder muito para evitar perda excessiva de pot\u00eancia. Ap\u00f3s a estrutura da bomba hidr\u00e1ulica ser desenhada, as especifica\u00e7\u00f5es e modelos da bomba hidr\u00e1ulica podem ser determinados consultando os manuais t\u00e9cnicos relevantes ou amostras de produtos de acordo com a press\u00e3o m\u00e1xima de trabalho e vaz\u00e3o m\u00e1xima de sa\u00edda da bomba hidr\u00e1ulica.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Na sele\u00e7\u00e3o real, porque o deslocamento da bomba, a faixa de velocidade e o fluxo de sa\u00edda sob diferentes press\u00f5es na velocidade t\u00edpica s\u00e3o geralmente fornecidos na amostra do produto. Portanto, quando o fluxo necess\u00e1rio q<sub>v<\/sub><img decoding=\"async\" width=\"13\" height=\"20\" src=\"\" alt=\"\" title=\"\"> do sistema \u00e9 conhecido, a taxa de fluxo da bomba q<sub>p<\/sub> (L \/ min), velocidade n (r \/ min) e deslocamento V (mL \/ r) devem ser considerados de forma abrangente. Na verdade, uma vez que o fluxo de sa\u00edda <img decoding=\"async\" width=\"13\" height=\"20\" src=\"\" alt=\"\" title=\"\">da bomba \u00e9<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">&nbsp;&nbsp;&nbsp;&nbsp;q<sub>p<\/sub>\uff1d Vn\u03b7<sub>v<\/sub>\u00d7 10<sup>-3<\/sup><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The output flow of the hydraulic pump should include the flow required by the actuator (the total flow can be obtained from the time chart when there are multiple actuators), the minimum overflow flow of the overflow valve, the sum of the leakage of each component, and the motor reverse rotation (usually 1r\/s or so), the flow reduction caused by the reduction in efficiency of the hydraulic pump after long-term use (usually 5% to 7%). Hydraulic Pump Parameter<\/li>\n\n\n\n<li>The flow rate of the hydraulic pump is related to the working condition, and the maximum flow rate of the hydraulic pump is determined by the maximum flow rate in the system working condition diagram. When selecting the flow rate of the hydraulic pump, it should not be less than or equal to the maximum flow rate when the hydraulic system is working. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>The flow rate of the hydraulic pump is related to the speed of the prime mover. When the prime mover and the hydraulic pump are connected by a coupling, the speed of the prime mover should be within the working speed range of the hydraulic pump, otherwise, a speed increasing or decelerating device should be installed between the prime mover and the hydraulic pump. Hydraulic Pump Parameter<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-6-regarding-the-speed-and-efficiency-of-the-pump\"><strong>Pergunta 6: Em rela\u00e7\u00e3o \u00e0 velocidade e efici\u00eancia da bomba<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"301\" height=\"218\" src=\"https:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-3.png\" alt=\"bomba hidr\u00e1ulica\" class=\"wd-lazy-fade wp-image-2655\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-3.png 301w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-3-18x12.png 18w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-3-150x109.png 150w\" sizes=\"(max-width: 301px) 100vw, 301px\" \/><figcaption><\/figcaption><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A press\u00e3o m\u00e1xima e a velocidade m\u00e1xima da bomba hidr\u00e1ulica devem ser usadas ao mesmo tempo para estender a vida \u00fatil da bomba hidr\u00e1ulica. O manual do produto fornece um gr\u00e1fico de orienta\u00e7\u00e3o mais detalhado dos par\u00e2metros da bomba hidr\u00e1ulica. Ao selecionar, voc\u00ea deve seguir estritamente os regulamentos do manual do produto.<\/li>\n\n\n\n<li>Quanto maior a press\u00e3o e menor a velocidade, menor a efici\u00eancia volum\u00e9trica da bomba hidr\u00e1ulica e a efici\u00eancia volum\u00e9trica da bomba vari\u00e1vel diminuir\u00e1 quando o deslocamento da bomba vari\u00e1vel for ajustado. Quando a velocidade \u00e9 constante, a efici\u00eancia total da bomba hidr\u00e1ulica \u00e9 a mais alta em uma certa press\u00e3o, e a efici\u00eancia total da bomba vari\u00e1vel \u00e9 a mais alta em um certo deslocamento e certa press\u00e3o. A efici\u00eancia total da bomba hidr\u00e1ulica tem grande influ\u00eancia na efici\u00eancia do sistema hidr\u00e1ulico. Portanto, \u00e9 tabu escolher uma bomba hidr\u00e1ulica de baixa efici\u00eancia. Voc\u00ea deve escolher uma bomba hidr\u00e1ulica de alta efici\u00eancia e tentar fazer com que a bomba hidr\u00e1ulica funcione em uma \u00e1rea de condi\u00e7\u00e3o de trabalho eficiente.<\/li>\n\n\n\n<li>Consider the problem from the perspective of improving energy conversion efficiency. Don&#8217;t just consider the rated working conditions, but should make the efficient working range as wide as possible. When choosing a hydraulic pump, do not reduce the specification of a large-capacity pump. This is because when the pump&#8217;s working pressure and working flow are less than its rated value, the overall efficiency of the pump will decrease. Generally speaking, the volumetric efficiency of the hydraulic pump is more important than the mechanical efficiency. Because the hydraulic pump can obtain power from the prime mover to compensate for the mechanical friction loss, but the leakage loss in the hydraulic pump cannot be compensated by increasing the power input. Of course, the rotational speed of the hydraulic pump should not be too high or too low, otherwise,\u00a0its mechanical efficiency will decrease. It is generally believed that when the hydraulic pump works in the range of 1000~1800r\/min, it has little effect on the overall efficiency. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>In the case of using an engine to drive the hydraulic pump, low speed is prohibited when the oil temperature is low, otherwise,\u00a0it will be difficult to absorb oil, and there will be a risk of seizing failure due to poor lubrication; at high speeds, cavitation, vibration, abnormal wear,\u00a0and flow must be considered The possibility of instability and other phenomena, to avoid drastic changes in the speed of the hydraulic pump from having a huge impact on the strength of the internal parts of the hydraulic pump. Hydraulic Pump Parameter<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-7-calculate-the-drive-power-of-the-hydraulic-pump\"><strong>Pergunta 7: Calcule a pot\u00eancia de acionamento da bomba hidr\u00e1ulica<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Se a press\u00e3o e a taxa de fluxo da bomba forem relativamente constantes durante o ciclo de trabalho (ou seja, a curva pt e a curva qt no diagrama de condi\u00e7\u00e3o de trabalho mudam mais suavemente), ent\u00e3o a pot\u00eancia de acionamento da bomba hidr\u00e1ulica P<sub>p<\/sub> Should be calculated as follows Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"has-text-align-center wp-block-paragraph\">P<sub>p<\/sub>\uff1d P<sub>p<\/sub>q<sub>p<\/sub>\/ \u03b7<sub>p<\/sub><\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-8-the-choice-of-motor\"><strong>Quest\u00e3o 8: A escolha do motor<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"324\" height=\"347\" src=\"https:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-1.png\" alt=\"bomba hidr\u00e1ulica\" class=\"wd-lazy-fade wp-image-2656\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-1.png 324w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-1-280x300.png 280w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-1-11x12.png 11w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1-1-150x161.png 150w\" sizes=\"(max-width: 324px) 100vw, 324px\" \/><figcaption><\/figcaption><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ao selecionar o motor el\u00e9trico da bomba hidr\u00e1ulica, o fator de influ\u00eancia da velocidade tamb\u00e9m deve ser considerado. A velocidade s\u00edncrona do motor el\u00e9trico n\u00e3o pode ser superior \u00e0 velocidade nominal da bomba hidr\u00e1ulica.<\/li>\n\n\n\n<li>Hydraulic pumps of fixed equipment are usually driven by electric motors. According to the power calculated above and the rotational speed of the hydraulic pump and its use environment, select its model specifications from the product catalog or manual (rated power, rotational speed, power supply, structure (vertical, horizontal, open, closed, etc.) ], and calculate the overload capacity to ensure that the peak overload of the motor is less than 25%~50% in each working stage. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>Since the hydraulic pump usually starts under no load, there is no excessively high requirement on the starting torque of the motor, the load changes relatively smoothly, and the number of starts is small, so a cage-type three-phase asynchronous motor can be used. But if the power of the hydraulic system is large and the grid capacity is not large, a wound rotor motor can be used. For hydraulic pumps that adopt variable frequency flow adjustment schemes, AC asynchronous motors controlled by variable frequency speed regulation or electromagnetic speed regulation should be used to drive the hydraulic pump. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>Motors of the same type with the same capacity (power) usually have different speeds for selection. Low-speed motors have a large number of magnetic poles, large dimensions and weights, high prices, and require pumps with a large displacement (under a certain flow rate), while high-speed motors are the opposite. Therefore, the speed of the motor should be considered comprehensively with the flow and displacement of the pump. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>The working environment of the hydraulic pump is different, and the protection form of its drive motor is required to be different: an open motor (protection mark is IP11) should be used in a clean and dry environment; a protective motor should be used in a cleaner and clean environment (protection mark is IP22 and IP23) drive; humid, dusty, high temperature, corrosive or weather-prone environments should be driven by enclosed motors (protection mark IP44); explosion-proof motors should be used in explosive environments. Hydraulic Pump Parameter<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-9-the-choice-of-internal-combustion-engine\"><strong>Pergunta 9: A escolha do motor de combust\u00e3o interna<\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"400\" height=\"312\" src=\"https:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump2-1.png\" alt=\"bomba hidr\u00e1ulica\" class=\"wd-lazy-fade wp-image-2658\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump2-1.png 400w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump2-1-300x234.png 300w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump2-1-15x12.png 15w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump2-1-150x117.png 150w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><figcaption><\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A maioria dos sistemas hidr\u00e1ulicos de m\u00e1quinas m\u00f3veis usa motores de combust\u00e3o interna para acionar bombas hidr\u00e1ulicas.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When the hydraulic pump is driven by an internal combustion engine, in one case, the hydraulic pump is only a part of the internal combustion engine&#8217;s drive load; in another case, the entire power of the internal combustion engine is used to drive the hydraulic pump. In the former, the power of the internal combustion engine is large, which can always meet the power required by the hydraulic pump. The speed of the internal combustion engine should match the optimal speed of the hydraulic pump. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">High-speed internal combustion engines usually have a deceleration device to make the hydraulic pump work within the optimal speed range. In the latter, the system in which the entire power of the internal combustion engine is used to drive the hydraulic pump is called a full hydraulic drive system. The full hydraulic drive system usually adopts a variable pump or variable motor volumetric speed control system to meet the requirements of large changes in the speed of mobile machinery. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The maximum speed of the internal combustion engine should meet the maximum flow required by the system and not exceed the maximum allowable speed of the hydraulic pump. If the engine speed is too high, a deceleration device should be installed. The maximum power of the internal combustion engine should be slightly greater than the maximum power required by the hydraulic system. Hydraulic Pump Parameter<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"h-hydraulic-pump-circuit-design\"><strong>Projeto do circuito da bomba hidr\u00e1ulica<\/strong><\/h2>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-1-closed-system-design\"><strong>Pergunta 1: Projeto de sistema fechado<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">A closed hydraulic system that uses a manual servo variable pump to control the commutation of the actuator should avoid self-priming and oil replenishment. As shown in Figure 1-1, in the process of using a manual servo variable pump to control the commutation of the actuator, the variable mechanism of the servo variable pump must pass the zero position (that is, the position when the variable pump has no flow output). The variable mechanism of the pump is set to zero. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">From the variable principle of the servo variable pump, it is known that pressure oil must be available to realize the variable. However, when the variable mechanism is in the zero position, no pressure oil can be generated when the self-priming oil is used. Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Note that corresponding measures should be taken to form a closed hydraulic system with a variable pump and a single-rod hydraulic cylinder. In Figure 1-2, the variable pump and the single-rod hydraulic cylinder form a closed hydraulic system. When the piston rod is extended, there will be no problem. When the piston rod is retracted, the hydraulic cylinder discharges more oil than it enters. The amount is much larger. If no measures are taken, the hydraulic cylinder cannot move at this time. Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When the hydraulic motor is operating as a hydraulic pump, avoid the main pump from being subjected to working pressure difference. Figure 1-3 In a closed system composed of a variable pump and a hydraulic motor, when the variable mechanism of the variable pump is set to zero, the motor operates as a meter under the action of external power. Adjusting the overflow valve can control the motor to operate as a pump. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The working pressure difference also acts on the main pump, but at this time, the variable mechanism of the main pump is set to zero as a stop valve. However, the high pressure cavity of the main pump has to bear high-pressure, and the relevant parts of the high-pressure cavity are equivalent to bear static high pressure, which is very disadvantageous. In addition, when the variable mechanism of the main pump deviates from zero due to vibration and other reasons, the system pressure will suddenly drop and cause an accident. Hydraulic Pump Parameter<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img class=\"wd-lazy-fade\" decoding=\"async\" width=\"1024\" height=\"318\" src=\"https:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1-1024x318.png\" alt=\"Figure 1-1 Avoid self-priming and refuelingFigure 1-2 Closed hydraulic systemFigure 1-3 Avoid the main pump from being subjected to pressure difference\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1-1024x318.png 1024w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1-300x93.png 300w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1-768x239.png 768w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1-18x6.png 18w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1-600x186.png 600w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1-150x47.png 150w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/1.png 1098w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><figcaption class=\"wp-element-caption\"><br>Figura 1-1 Evite auto-escorvamento e reabastecimento<br>Figura 1-2 Sistema hidr\u00e1ulico fechado<br>Figura 1-3 Evite que a bomba principal seja submetida \u00e0 diferen\u00e7a de press\u00e3o<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">When designing the pump-motor closed system, pay attention to the situation of heavy objects falling at the moment of driving. As shown in Figure 1-3, the heavy lifting closed system is composed of a hydraulic pump and hydraulic motor. When the brake of the motor is released, the heavy object forms an excess torque to drive the hydraulic motor to rotate, so that the hydraulic motor is in working condition of the hydraulic pump. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">With the increase of the falling speed of the weight, once the torque of the pressure oil at the motor outlet is not enough to balance with the load torque of the weight acting on the hydraulic motor, the falling speed of the weight will be out of control, causing a crash accident. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because the pressure built up by the heavy object causes oil compression and oil leakage, which are the main reasons for the sliding of the heavy object at the moment of driving, a one-way valve can be installed in the high-pressure pipeline of the system close to the hydraulic motor to connect the hydraulic motor with other The components are separated, <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">and the pressure signal of the heavy object can also be used to control the variable mechanism of the hydraulic pump so that the outlet pressure of the hydraulic pump automatically tracks the pressure established by the weight at the motor outlet so that the sliding speed of the heavy object can be significantly reduced at the moment of driving. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The sliding distance is greatly reduced, and the working reliability of the hydraulic system is also improved. Hydraulic Pump Parameter<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"766\" height=\"392\" src=\"https:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2.png\" alt=\"Figura 1-4 O sistema fechado de levantamento pesado composto de bomba hidr\u00e1ulica e motor hidr\u00e1ulico\" class=\"wd-lazy-fade wp-image-2778\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2.png 766w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2-300x154.png 300w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2-18x9.png 18w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2-600x307.png 600w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/2-150x77.png 150w\" sizes=\"(max-width: 766px) 100vw, 766px\" \/><figcaption class=\"wp-element-caption\"><br>Figura 1-4 O sistema fechado de levantamento pesado composto de bomba hidr\u00e1ulica e motor hidr\u00e1ulico<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The variable pump determines the amount of oil supplement for the closed system of the main pump. In a closed system where the variable pump is the main pump, it is inevitable to supplement the oil. However, only the actual flow rate of the variable pump in the system is used as the basis for determining the replenishment, which sometimes results in insufficient replenishment. If the rated speed of the variable pump is 1500r\/min, and the speed of the variable pump in the system is only 1000r\/min, <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">or the actual maximum flow of the system variable pump is only 90% of the rated flow of the pump, etc., insufficient oil supplement will occur. Hidden dangers. Of course, when determining the replenishment amount of a closed hydraulic system, the leakage caused by pipelines, valves,\u00a0and actuators still needs to be considered. Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The oil in the replenishment circuit should not be returned to the oil without cooling. If the oil in the replenishing circuit uses uncooled return oil, the temperature of the system oil will rise, which will adversely affect the system. If the leakage in the components and the system increases, the sealing device rapidly ages and deteriorates, loses the sealing performance, accelerates the oxidation of the oil, causes the oil to deteriorate, and reduces the service life of the oil. Therefore, the oil in the replenishment circuit should not be used. Cooled oil return. Hydraulic Pump Parameter<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-2-hydraulic-pump-circuit-design-taboos\"><strong>Pergunta 2: Tabus de design do circuito da bomba hidr\u00e1ulica<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The built-in overflow valve of the hydraulic pump is not suitable for system pressure adjustment, but should only be used as a safety valve. A simple, direct-acting relief valve is installed in some types of hydraulic pumps, and the valve has a small diameter. It is generally not suitable for system pressure adjustment, but only as a safety valve. The structure of the relief valve and the safety valve are similar, <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">but the diameters of the two types of valves are different, and the purpose of the use is also different. The relief valve used for system pressure regulation requires a large valve diameter, which is mainly used to stabilize the system pressure, and the flow rate varies. The safety valve is mainly used to protect the system pressure from overloading. <\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Usually, the diameter is small and the flow rate is small, and the system pressure cannot be returned to normal. Therefore, the built-in relief valve of the hydraulic pump should not be used for system pressure adjustment, but should only be used as a safety valve. Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The constant power speed control circuit should not be used alone. In Figure 1-5, the constant power pump and the variable motor form a so-called constant power speed control loop. Generally, the speed control loop is required to have greater speed rigidity. But the speed rigidity of this circuit is proportional to the square of the motor displacement, but when the displacement of the variable motor is reduced, the speed rigidity will drop sharply, and the torque that can be output is also reduced, so there are few such circuits Use alone. Hydraulic Pump Parameter<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"365\" height=\"184\" src=\"https:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/3.png\" alt=\"Figura 1-5 O circuito de controle de velocidade de pot\u00eancia constante evita o uso independente\" class=\"wd-lazy-fade wp-image-2779\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/3.png 365w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/3-300x151.png 300w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/3-18x9.png 18w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/3-150x76.png 150w\" sizes=\"(max-width: 365px) 100vw, 365px\" \/><figcaption class=\"wp-element-caption\"><br>Figura 1-5 O circuito de controle de velocidade de pot\u00eancia constante evita o uso independente<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Excessive pressure loss in the pipeline causes the output flow of the constant power variable pump to fail to meet the expected requirements. As shown in Figure 1-6, the outlet of the constant power variable pump is connected to the hydraulic cylinder through a one-way valve and a reversing valve, and the return oil of the hydraulic cylinder also needs to flow to the oil tank through the corresponding valve. Because some valve specifications are selected too small, the pressure loss is too large. As a result, the output flow of the pump is much smaller than expected, which fails to meet the requirements of the hydraulic cylinder to move quickly. Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">When multiple actuators adapt throttling speed regulation, avoid using only one hydraulic pump for oil supply. When there are multiple actuators in the system, each agency cannot always maintain the coordination of flow and pressure requirements. However, the use of a throttling speed control circuit inevitably has overflow loss and throttling loss. At this time, if only one pump is used to supply oil, the pump must be selected based on the highest pressure and flow required by the system, which cannot adapt to the low-pressure small flow and high-pressure large flow conditions, resulting in low efficiency of the system, as shown in Figure 1- 7 shown. Hydraulic Pump Parameter<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"1001\" height=\"429\" src=\"https:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/4.png\" alt=\"Figura 1-6 Loop de controle de velocidade da bomba vari\u00e1vel de pot\u00eancia constante Figura 1-7 Controle de velocidade do acelerador multi-atuador\" class=\"wd-lazy-fade wp-image-2780\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/4.png 1001w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/4-300x129.png 300w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/4-768x329.png 768w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/4-18x8.png 18w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/4-600x257.png 600w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/4-150x64.png 150w\" sizes=\"(max-width: 1001px) 100vw, 1001px\" \/><figcaption class=\"wp-element-caption\"><br>Figura 1-6 Loop de controle de velocidade da bomba vari\u00e1vel de pot\u00eancia constante Figura 1-7 Controle de velocidade do acelerador multi-atuador<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The diameter of the stop valve at the suction port of the hydraulic pump should not be too small. To facilitate maintenance, a shut-off valve is generally installed at the inlet of the hydraulic pump, which will increase the flow resistance of the pump. Therefore, the diameter of the shut-off valve must be large enough to prevent the vacuum of the hydraulic pump from being too high. The shut-off valve should have sufficient pressure resistance. When selecting the shut-off valve on the high-pressure pipeline, in addition to the maximum working pressure of the system, the instantaneous pressure change of the system should also be estimated to prevent damage. Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The speed of the hydraulic pump should not be too high. The hydraulic pump has a rated speed, and it is not allowed to rotate too high during use, to avoid problems such as insufficient oil suction, increased wear, and reduced life of the hydraulic pump. Generally, the maximum speed of gear pumps and vane pumps is 2000r\/min, while plunger pumps should work at a speed of 1000r\/min, which should not exceed 1500r\/min. Hydraulic Pump Parameter<\/p>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-3-self-priming-problem\"><strong>Pergunta 3: problema de escorvamento autom\u00e1tico<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">When used in an open hydraulic circuit, the hydraulic pump needs to have a certain self-priming capacity. The occurrence of cavitation may not only damage the hydraulic pump, but also cause vibration and noise, which will make the control valve and executive components operate poorly, and have a bad influence on the entire hydraulic system. Hydraulic Pump Parameter<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Tabus para garantir a capacidade de auto-escorvamento<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ao confirmar a capacidade de escorvamento autom\u00e1tico da bomba hidr\u00e1ulica usada, \u00e9 necess\u00e1rio determinar e projetar a posi\u00e7\u00e3o de instala\u00e7\u00e3o da bomba hidr\u00e1ulica em rela\u00e7\u00e3o ao n\u00edvel do tanque de \u00f3leo com base no c\u00e1lculo da resist\u00eancia da linha de suc\u00e7\u00e3o em considera\u00e7\u00e3o \u00e0s condi\u00e7\u00f5es de temperatura de opera\u00e7\u00e3o de o dispositivo hidr\u00e1ulico e a viscosidade do \u00f3leo hidr\u00e1ulico. Linha de suc\u00e7\u00e3o. Ao calcular a capacidade de escorvamento autom\u00e1tico da bomba hidr\u00e1ulica, uma margem suficiente deve ser deixada.<\/li>\n\n\n\n<li>The distance from the center of the hydraulic pump to the oil surface is not more than 500mm, and the suction pressure should be within -125mmHg, otherwise cavitation is prone to occur, causing damage to parts, noise, vibration,\u00a0and other failures. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>Instale um filtro de suc\u00e7\u00e3o de \u00f3leo de malha 150 na linha de suc\u00e7\u00e3o. Alguns fabricantes de bombas de \u00eambolo estipulam que n\u00e3o \u00e9 permitido instalar um filtro de \u00f3leo na linha de suc\u00e7\u00e3o, mas isso deve ter requisitos r\u00edgidos sobre a limpeza do \u00f3leo no tanque. Instale o filtro de \u00f3leo na bomba hidr\u00e1ulica, mas isso deve ter requisitos r\u00edgidos sobre a limpeza do \u00f3leo no tanque de \u00f3leo. Instale um filtro de \u00f3leo de oleoduto com uma precis\u00e3o de filtragem de malha 25 no lado de sa\u00edda da bomba hidr\u00e1ulica.<\/li>\n\n\n\n<li>Observe que a velocidade da bomba hidr\u00e1ulica n\u00e3o pode ser maior que a velocidade nominal.<\/li>\n\n\n\n<li>Preste aten\u00e7\u00e3o para que o di\u00e2metro do tubo de suc\u00e7\u00e3o n\u00e3o seja inferior ao valor recomendado (consulte o cat\u00e1logo de produtos de dimens\u00f5es de instala\u00e7\u00e3o), e o tubo de suc\u00e7\u00e3o seja no m\u00e1ximo uma junta de cotovelo.<\/li>\n\n\n\n<li>If the oil distribution plate needs to reduce the deflection angle of the swash plate when starting, it cannot guarantee self-priming. If the user needs a small flow, he should use the variable mechanism to change the flow after the hydraulic pump is started at full deflection. Hydraulic Pump Parameter<\/li>\n\n\n\n<li>For hydraulic pumps with poor self-priming, avoid installing filters on their suction pipes. As shown in Figure 1-8(a), if a hydraulic pump with poor self-priming is equipped with a filter at its suction port, as the pressure drop of the filter increases, the minimum suction pressure of the hydraulic pump will not be guaranteed. As a result, the hydraulic pump is insufficient to absorb oil, the volumetric efficiency also drops sharply, and vibration and noise occur until the hydraulic pump is damaged. It should be changed to the structure shown in Figure 1-8 (b). Hydraulic Pump Parameter<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image aligncenter size-large\"><img decoding=\"async\" width=\"301\" height=\"326\" src=\"https:\/\/yaiwo.com\/wp-content\/themes\/woodmart\/images\/lazy.svg\" data-src=\"http:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/5.png\" alt=\"Figura 4-9 Bomba hidr\u00e1ulica com escorvamento autom\u00e1tico deficiente\" class=\"wd-lazy-fade wp-image-2781\" title=\"\" srcset=\"\" data-srcset=\"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/5.png 301w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/5-277x300.png 277w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/5-11x12.png 11w, https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/5-150x162.png 150w\" sizes=\"(max-width: 301px) 100vw, 301px\" \/><figcaption class=\"wp-element-caption\"><br>Figura 4-9 Bomba hidr\u00e1ulica com escorvamento autom\u00e1tico deficiente<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>O problema de refluxo e auto-escorvamento<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Para bombas com vaz\u00e3o superior a 160L \/ min, \u00e9 recomend\u00e1vel adotar auto-escorvamento de refluxo.<\/li>\n\n\n\n<li>O di\u00e2metro do tubo de suc\u00e7\u00e3o n\u00e3o deve ser inferior ao valor recomendado e o di\u00e2metro da v\u00e1lvula de corte deve ser duas vezes o di\u00e2metro do tubo de suc\u00e7\u00e3o.<\/li>\n\n\n\n<li>O comprimento do tubo de suc\u00e7\u00e3o da bomba de \u00f3leo \u00e9 L &lt;2500mm, os cotovelos do tubo n\u00e3o devem ser mais do que dois, a dist\u00e2ncia do tubo de suc\u00e7\u00e3o \u00e0 parede do tanque \u00e9 H1&gt; 3D, a dist\u00e2ncia do tubo de suc\u00e7\u00e3o ao fundo do tanque \u00e9 H\u22653D e D \u00e9 o di\u00e2metro do tubo de \u00f3leo.<\/li>\n\n\n\n<li>Quando o n\u00edvel de \u00f3leo mais baixo do tanque de \u00f3leo \u00e9 300 mm mais alto do que o centro da entrada de \u00f3leo da bomba de \u00f3leo, a bomba hidr\u00e1ulica pode iniciar a escorvamento autom\u00e1tico em um pequeno \u00e2ngulo de deflex\u00e3o.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>O problema de escorvamento autom\u00e1tico da bomba de \u00f3leo de instala\u00e7\u00e3o vertical<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A dist\u00e2ncia da porta de suc\u00e7\u00e3o da bomba de \u00f3leo at\u00e9 o n\u00edvel de \u00f3leo mais baixo n\u00e3o \u00e9 superior a 500 mm.<\/li>\n\n\n\n<li>A junta de enchimento de \u00f3leo no tubo de retorno de \u00f3leo deve ser mais alta do que a linha de lubrifica\u00e7\u00e3o do mancal da bomba de \u00f3leo (a face da extremidade da tampa do flange da extremidade do eixo).<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\" id=\"h-question-4-cooling-problem\"><strong>Pergunta 4: problema de resfriamento<\/strong><\/h3>\n\n\n\n<p class=\"wp-block-paragraph\" id=\"h-pour-oil-into-the-hydraulic-pump-and-motor-housing-for-cooling-to-avoid-high-pressure-in-the-housing-sometimes-it-is-necessary-to-vent-oil-to-the-casing-of-the-hydraulic-pump-and-motor-to-cool-the-hydraulic-pump-and-motor-this-is-necessary-but-remember-not-to-take-the-pressure-of-the-oil-in-the-casing-too-high-otherwise-it-will-cause-the-hydraulic-pump-and-motor-shaft-seal-at-the-same-time-some-plunger-pumps-will-increase-the-resistance-of-the-plunger-in-the-suction-chamber-to-extend-outward\">Despeje \u00f3leo na bomba hidr\u00e1ulica e na carca\u00e7a do motor para resfriamento para evitar alta press\u00e3o na carca\u00e7a. \u00c0s vezes \u00e9 necess\u00e1rio ventilar o \u00f3leo para a carca\u00e7a da bomba hidr\u00e1ulica e do motor para resfriar a bomba hidr\u00e1ulica e o motor. Isso \u00e9 necess\u00e1rio, mas lembre-se de n\u00e3o levar a press\u00e3o do \u00f3leo na carca\u00e7a muito alta, caso contr\u00e1rio, far\u00e1 com que a bomba hidr\u00e1ulica e a veda\u00e7\u00e3o do eixo do motor ao mesmo tempo, algumas bombas de \u00eambolo aumentem a resist\u00eancia do \u00eambolo na suc\u00e7\u00e3o c\u00e2mara para se estender para fora.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Quando a bomba hidr\u00e1ulica geralmente funciona com excentricidade zero ou a press\u00e3o de trabalho do sistema \u00e9 inferior a 8 MPa, de modo que o vazamento da bomba hidr\u00e1ulica \u00e9 muito pequeno e o corpo da bomba aquece, o circuito de \u00f3leo pode ser for\u00e7ado a circular e resfriar.<\/p>","protected":false},"excerpt":{"rendered":"<p>Selection of hydraulic pump The hydraulic pump is an energy conversion device, which converts the mechanical energy of the driving<\/p>","protected":false},"author":4,"featured_media":2643,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[927,549,928],"class_list":["post-2632","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-hydraulic-press","tag-electric-hydraulic-pump","tag-hydraulic-pump","tag-hydraulic-pump-selection-parameters"],"jetpack_featured_media_url":"https:\/\/yaiwo.com\/wp-content\/uploads\/2021\/06\/hydraulic-pump-1.jpg","_links":{"self":[{"href":"https:\/\/yaiwo.com\/pt\/wp-json\/wp\/v2\/posts\/2632","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/yaiwo.com\/pt\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/yaiwo.com\/pt\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/yaiwo.com\/pt\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/yaiwo.com\/pt\/wp-json\/wp\/v2\/comments?post=2632"}],"version-history":[{"count":0,"href":"https:\/\/yaiwo.com\/pt\/wp-json\/wp\/v2\/posts\/2632\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/yaiwo.com\/pt\/wp-json\/wp\/v2\/media\/2643"}],"wp:attachment":[{"href":"https:\/\/yaiwo.com\/pt\/wp-json\/wp\/v2\/media?parent=2632"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/yaiwo.com\/pt\/wp-json\/wp\/v2\/categories?post=2632"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/yaiwo.com\/pt\/wp-json\/wp\/v2\/tags?post=2632"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}