外文文獻翻譯機械設計制造及其自動化液壓泵中英文對照-文庫吧在線文庫
【正文】 ere the pump is located, and how durable it is, all are related to reliability. The service life of a pump is rated in hours of operation. Many hydraulic pumps hava a service life of 10000 hours, or about one year. Other operate for three or five years at about 5000 hours per year, for a total of 15000 or more hours. The service life depends on the design and construction of the pump as well as on the application. 。這種變化繼而影響泵的效率。 旋轉泵的最大安全速度是有限的，它使得泵有能力去避免氣穴現象和過高的出口壓力。這個能耗取決于泵壓力，和給定時間內的泵的輸送流量。 排量 壓力 能耗 轉速 效率 可靠性 流量 大小和重量 操作適應性 使用壽命 安裝和維護成本 我們主要通過一個泵的容量來評價它。 大多數正排量泵被分類為旋轉泵。大多數液壓泵是回轉型的正排量容積泵。第二 ,它的機械作用傳遞液壓油到出口并進入液壓系統，正如表 51所示。 當液壓 泵工作時 ，它執(zhí)行兩個功能， 首先 ,它在其入口創(chuàng)建了一個局部真空， ,允許大氣壓力作用下推動液壓油通過入口過濾器和油路進入泵的吸油腔。然而，負排量泵是持續(xù)性排油，正排量泵是間歇（脈動）的排油，這些脈動很小，可以通過蓄能器和系統管路消除。這些變量泵更低的效率有些時候抵消了部分更高的系統整體效率。當選者一個泵時，應考慮遵循泵的功率選擇因素。 能耗是一個重要的考慮因素，不僅僅是在泵的選擇上，而且還是在系統安裝完成后泵的操作性能上。 一些工業(yè)液壓泵額定速度甚至高達 4000轉 /分鐘。 隨著壓力的增加 ,泵的流量減少，減少這種數量的變化取決于泵的使用種類。 使用壽命取決于設計和泵的結構以及它的用途 A hydraulic pump is a mechanical device which converts mechanical energy into hydraulic specifically ,a pump converts the kiic(moving) energy of a rotating shaft into the kiic energy of fluid flow. The fluid flow also has potential energy that allows it to overe the resistance of the system to fluid flow .Remember that a pump provides the force produce flow and transmit power . Hydraulic pressure is caused by the load on the system and by the resistance of the hydraulic system to fluid flow. When operating , a hydraulic pump performs two functions. First, it creates a partial vacuum at its inlet ,permitting the atmospheric pressure in the fluid reservoir to push the hydraulic fluid through the inlet strainer and line into the pump .Second, its mechanical action delivers the fluid to its outlet and into the hydraulic systems, as shown in . As the fluid leaves the pump, it encounters the working pressure in the system. This pressure is produced by the pressure regulating valve, the system work load ,and flow losses in the hydraulic tubing A pump is classified
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