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贵刊在1988年第6期刊出“液压滑台自走现象的排除方法”后,1989年第9期刊出了王骊和黄志坚等的不同排除方法。笔者认为王骊提出的排除方法仍有不足之处: 1.如王文图1所示,当滑台从2″工位向1″工位移动至顶住定位柱后,DT_2失电、主换向阀4处于中间机能,小流量换向阀2是右侧机能,换向阀4前的压力油向阀后泄漏,而无杆腔的油经节流阀3回油箱。此时,液压缸有杆腔的压力大于无杆腔。当泄漏油的流量小于节流阀3排出的流量时,无杆腔只有较小的静压力。这种静压力将随着节流阀油流的散失而消失,只要有杆腔里边压力达到一定的峰值时,液压滑台仍然有向左行的趋势。
After your magazine published the “Method of Eliminating Hydraulic Slippery Walker” in the 6th issue of 1988, the 9th issue of 1989 published different methods to eliminate Wang Li and Huang Zhijian. I think Wang Li’s exclusion method is still inadequate: 1. As Wang Wen Figure 1 shows, when the slide from 2 “to 1” position to move to withstand the positioning column, DT_2 power loss, the main commutation Valve 4 is in the middle of the function, the small flow valve 2 is the right side of the function, the pressure valve to the valve 4 before the leakage to the valve, while the rod chamber oil through the throttle valve 3 back to the tank. At this point, the hydraulic cylinder rod chamber pressure is greater than the rodless chamber. The rodless chamber has only a small static pressure when the leakage oil flow is less than the flow rate throttled by the throttle valve 3. This static pressure will disappear with the loss of throttle flow, as long as the pressure inside the rod chamber reaches a certain peak, the hydraulic slide still to the left line trend.