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介绍机械调压电控换挡变速阀的原理,对试验过程中出现的机械调压电控换挡变速阀压力曲线非常陡,起不到调压的问题进行分析,找到产生问题的原因。对该阀的快回阀节流孔径改进后进行试验,结果显示各挡压力曲线变化柔和,可以满足推土机的使用要求。
Introducing the principle of mechanical pressure-controlled electronic gear-shift shift valve, the pressure curve of the mechanical pressure-controlled electrical shift gear valve appearing in the test process is very steep, the problem of failing to regulate voltage is analyzed to find out the cause of the problem. The valve’s quick-return valve orifice improved after the test, the results show that the various pressure curve gentle changes to meet the requirements of bulldozers.