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液压凿岩机的工作原理与气动凿岩机相同,也是利用压差作用,迫使冲击活塞在缸体内作高速往复运动,以冲击钎杆破碎岩石。冲击活塞及其配油阀在机体内既个自独立运动,又互相制约。冲击活塞的运动是通过配油阀的换向,来改变油缸前后腔的压力状况而实现的;而配油阀的换向,是通过冲击活塞打开或关闭油路,以改变油压来实现的。当前使用的液压凿岩机,分有阀和无阀两大类。配油阀的形状分柱阀型和套阀型两种:柱阀的阀体是带凸台的圆柱形,使阀体形成几个不同的受压面,简称滑阀;套阀的阀体周围也有不同直径的凸肩,简称套阀或
Hydraulic rock drill works with the same pneumatic rock drill, but also the use of differential pressure, forcing the impact of the piston in the cylinder for high-speed reciprocating motion to impact the rock broken rod. Impact piston and its distribution valve both in the body of a separate movement, but also each other constraints. Impact piston movement is through the valve with the commutation, to change the front and rear cylinder pressure conditions and achieved; and valve with the valve, through the impact of the piston to open or close the oil, to change the oil pressure to achieve . Currently used hydraulic rock drill, divided into valve and valveless two categories. The shape of the oil distribution valve and valve sleeve valve type two: column valve body is a cylindrical boss, the valve body to form several different pressure surface, referred to as the spool valve; sleeve valve body There are also different diameter around the shoulder, referred to as sleeve valve or