原文：
         工作原理 卸荷溢流阀由溢流阀和单向阀组成。当系统压力达到溢流阀的开启压力时，溢流阀开启，泵卸荷；当系统压力降至溢流阀的关闭压力时，截止阀溢流阀关闭，泵向系统加载。使泵卸荷时的压力称为卸荷压力，使泵处于加载状态的压力称为加载压力。 功能及应用：卸荷溢流阀的主要功能是自动控制泵的卸荷或加载。鉴于卸荷溢流阀的功用，要求卸荷压力与加载压力之间存在一定差别。 球阀差值过小，则泵的卸荷与加载动作过于频繁；差值过大，则系统压力变化太大。 加载压力与卸荷压力的差值是卸荷溢流阀的重要性能指标，蝶阀一般加载压力为卸荷压力的85%左右。其性能与溢流阀相同。

         卸荷溢流阀的主要用途： a.蓄能器系统中泵的自动卸荷及加载； b.高低压泵组合中大流量低压泵的卸荷。 生产产品厂家：国内主要是榆次液压集团有限公司、闸阀北京华德液压集团有限公司、上海立新液压件厂等。国外有美国Vickers、德国力士乐等厂家。 卸荷溢流阀德选用：卸荷溢流阀主要用于装有蓄能器德液压回路中，当蓄能器充液压力达到阀德设定压力时自动地使液压泵卸荷。阀中有内装单向阀防止蓄能器中的有压油液倒流。此时由蓄能器维持对系统供油而泵卸荷从而收到节能效果。当蓄能器中油液压力降至到阀设定压力地85%左右时，阀又复载，液压泵恢复向蓄能器充液。 这种阀也可以用于双泵高低压回路。止回阀低压时两个泵同时向系统供油，高压时此阀使大泵卸荷并把它与高压部分隔开。 用于蓄能器地阀与蓄能器之间地压降不得超过设定压力地10%。外泄式阀泄油口背压不得超过设定压力地2%。

“ Unloading Relief Valve works with the main purpose ”是由中国球阀网提供的阀门行业新闻，译文仅供参考。另外，中国球阀网还提供相关产品搜索： 保温球阀、 一片式球阀(一体式/一件式)、 二片式球阀(二件式)、 三片式球阀(三件式)、 V型球阀、 固定球阀 等。

译文：
          Work Unloading relief valve by the pressure relief valve and one-way valve. When the system pressure reaches the opening pressure relief valve, relief valve open, pump unloading; when the system pressure dropped to close the pressure relief valve, relief valve closed, pump to the system load. Unloading the pump when the pressure is called unloading pressure, the pump pressure in the loaded condition called load pressure. Function and application: The main function of unloading relief valve is automatic pump unloading or loading. In view of Hydraulic control valves the function of unloading relief valve to require unloading and loading pressure difference exists between the pressure. The difference is too small, the unloading and loading pump action too frequently; difference is too large, the system pressure too much. Loading and unloading the pressure difference between the pressure relief valve is an important unloading performance,Forged Steel Valves the general pressure loading unloading pressure about 85%. The same performance and relief valve. Unloading relief valve of the main purposes: a. energy storage system, the pump automatically unloading and loading; b. portfolio of high-voltage high-volume low-pressure pump pump unloading. Manufacturers produce goods: domesticWater Control valves mainly Yuci hydraulic Group Co., Ltd., Beijing, China and Germany hydraulic Group Co., Ltd., Shanghai Lixin Hydraulic Parts, etc.. Overseas, the United States Vickers, Rexroth, Germany and other manufacturers. Unloading Relief Valve Germany used: mainly used for unloading relief valve with accumulator hydraulic circuit in Germany, when the accumulator valve fluid-filled pressure on Germany to set up automatically when the pressure to pump unloading. Valve has built-in check valve to prevent a pressure accumulator in the oil back. At thisOther pumps point the accumulator and the pump to maintain oil unloading system to receive energy saving effect. When the storage device to the valve of the oil pressure dropped to 85% of set pressure, the valve is once set,Cast Steel hydraulic pump to restore the accumulator filled. This valve can also be used for dual-pump high-voltage circuit. When the two low-pressure oil pump while the system, high pressure pump when the valve so that unloading of large and separated from it with high-pressure part. Way valve for the accumulator and the accumulator pressure drop between the land shall not exceed the set pressure to 10%. Leakage-type back pressure valve drain port shall not exceed the set pressure to 2%.

原文来源：http://www.1qiufa.com/

2010-08-31 08:55

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