The invention belongs to the technical field of hydraulic machinery, and particularly relates to a self-compensating hydraulic pump, a check valve assembly of the self-compensating hydraulic pump is arranged in a cavity of a plunger, a valve rod in the middle of a check valve can move up and down under the driving of hydraulic force, and when the hydraulic force of a third cavity is larger than that of a first cavity, the valve rod stably moves upwards under the action of the hydraulic force and a reset spring, and a valve is opened; and oil enters the first cavity from the third cavity, so that the oil enters a main oil cavity of the suspended pneumatic hydraulic cylinder through the first cavity through-flow hole. When the hydraulic pressure of the first cavity is larger than that of the third cavity, the valve rod moves downwards and closes the valve, and oil in the main oil cavity is prevented from flowing back. A shaft sleeve assembly and a sleeve assembly are assembled outside the plunger assembly, and a guiding effect is achieved for reciprocating motion of the plunger assembly. The structure is more integrated and reliable, the optimal working position of the suspension pneumatic hydraulic cylinder can be adjusted back when the vehicle posture is lowered under the condition that a hydraulic system is not additionally arranged, and the suspension pneumatic hydraulic cylinder has the advantages of being simple in structure, low in cost and the like. The device has a wide application prospect in the field of mining machinery.
本发明属于液压机械技术领域,具体涉及一种自补偿液压泵,其止回阀总成置于柱塞的腔体内,止回阀中部的阀杆,在液压力的驱动下可上下移动,当第三腔液压力大于第一腔时,阀杆在液压力和复位弹簧作用下稳步上行,并打开阀门,油液从第三腔进入第一腔,使油液通过第一腔通流孔进入悬挂气动液压缸的主油腔。当第一腔液压力大于第三腔液压力时,阀杆下行并关闭阀门,防止主油腔内部的油液回流。柱塞总成外部装配有轴套总成和套筒总成,为柱塞总成的往复运动形成导向作用。本发明结构更加集成可靠,可在不附加液压系统的情况下,实现车姿降低时悬挂气动液压缸最佳工作位置的回调,具有结构简单、成本低廉等特点。在矿山机械领域有着广泛的使用前景。
Self-compensating hydraulic pump
一种自补偿液压泵
2025-01-28
Patent
Electronic Resource
Chinese