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各种型式的油缸中,单活塞杆往复运动油缸结构最简单。它被广泛地用作直线往复运动的液压执行部件。在实现制动时一般是利用换向阀、液控单向阀和机械制动器等,其中用换向阀制动最简便。但所用换向阀的内泄漏对油缸制动的影响有时是不可忽视的。 通常,换向阀是采用静压平衡的,其可动部分使用滑柱式滑动构件即滑阀,阀体与滑阀之间直径上容许有5～10μ的间隙,因此在阀腔内相邻沉割槽之间的密封处产生所谓内泄
Various types of fuel tanks, single-piston reciprocating cylinder structure is the simplest. It is widely used as a linear reciprocating hydraulic actuator. In the realization of the brake is generally the use of directional control valve, hydraulic check valve and mechanical brake, etc., of which the most convenient valve with brake. However, the use of directional valve leakage on the cylinder brake sometimes can not be ignored. Normally, the directional control valve is hydrostatically balanced. The movable part of the valve uses a slide-type slide member, that is, a spool valve. The clearance between the valve body and the spool valve is allowed to have a clearance of 5 to 10μ. Therefore, adjacent to the valve chamber Recessed trough between the seal at the so-called internal leakage