高扬程填料密封结构水泵轴封水压力的调节

The Adjustment of Water Pressure in Pump Packing Axial Seal with High Head

由于高扬程填料密封结构水泵一般是从水泵的压水室直接引取高压水对填料进行密封和润滑,使得填料密封腔内轴封水压力过高,泄漏量过大,压紧填料又增加轴(轴套)与填料的磨损,为此专门设计了调压阀,用于调节轴封水的压力。介绍了调压阀的结构、使用与调节原理,调节阀开启度与轴封水压力、流量关系的试验确定方法等。使用情况表明,使用该阀能实现对轴封水的压力、流量的自由调节,确保轴封水达到最佳的压力和流量。

Since pumps of high head with packing seal structure generally take water of high pressuredirectly from pumping chamber to seal and lubricate the packing, the axial seal pressure in packing chamberis high and leakage is large. If the packing pressed tight, the wear between axle sleeve and packing will beincreased. So a pressure regulating valve was designed to adjust the water pressure of axial seal. And thestructure, principal of use and adjustment and the test method to determine the relationship among opendegree, axial seal pressure and flow rate for this kind of valve are introduced. Its use case has manifested thatit can realize the adjustment of flow rate and the water pressure of axial seal freely to ensure the water for axialseal obtain the optimal pressure and flow rate.