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当齿轮式液压油泵内的密封元件老化变质或轴套端面磨损后,就会使高压油腔和低压油腔相通,形成内部泄漏——即内漏。内漏,是齿轮式液压油泵常见的故障。由于液压油泵内漏,整个液压系统建立不起正常的工作油压,因此内漏也是导致拖拉机液压系统提升无力的一个主要原因。一般齿轮式液压油泵内漏的原因可归纳为五点。 1.轴套端面上分隔高低压区的橡胶密封环老化变形或损坏造成齿轮式液压油泵内漏,是一种常见的情况,象3系列泵前,后泵盖上的四个小密封环和CB系列泵卸压片上的隔离圈老化变形后,就会使轴套端面的高、低压区相通,这样由压油腔引来作液力压紧用的高压油便自高压区窜入低压区。由于3系列泵的
When the gear-type hydraulic pump seal aging deterioration or sleeve end wear, it will make the high-pressure oil chamber and the low-pressure oil chamber connected to form an internal leakage - that is, internal leakage. Internal leakage, gear pump is a common fault. As the hydraulic pump leakage, the entire hydraulic system can not afford the normal working pressure, so the leakage is also leading to the tractor hydraulic system to enhance the weakness of a major reason. General gear hydraulic pump leakage can be grouped into five reasons. 1. The sleeve end face separating the high and low pressure zone rubber seal ring aging deformation or damage caused by the gear hydraulic pump leakage is a common situation, like 3 series pump before and after the pump cover four small seal ring and CB series of pressure relief valve on the diaphragm after the aging deformation, it will make the sleeve end of the high and low pressure zone connected, so by the pressurized oil chamber for high-pressure hydraulic pressure from high pressure zone into the low-pressure zone . Thanks to the 3 series pump