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在各种工程机械中,为使负载停留在某一预定位置或防止负载在下降动作中产生超速下滑,则需在液压系统中加入合适的压力控制阀或流量控制阀。这样的回路称之为平衡回路或限速回路。由于平衡回路的工作原理是在油路的一侧造成一定的背压进行速度控制,故也称为背压回路。本文仅就液压传动中常用的几种平衡回路的特点、性能加以定性的分析,归纳出各种回路的适用范围。
In a variety of construction machinery, in order to stop the load at a predetermined position or prevent the load during the descent speed overspeed, you need to add a suitable pressure control valve or flow control valve in the hydraulic system. This circuit is called a balanced circuit or speed limit circuit. As the working principle of the balance circuit is caused by a certain back pressure on the oil side of the speed control, it is also known as the back pressure circuit. This article only on the hydraulic drive commonly used in several balance circuit characteristics, performance analysis to be qualitative, summed up the scope of the various circuits.