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二、液压凿岩机的工作原理液压凿岩机按配油方式可分为无阀和有阀的两种。按阀的结构又可分为套简阀式和滑阀式,又有前腔常进油式和后腔常进油式。现在分别依照配油方式来说明几种凿岩机的工作原理。 1.无阀凿岩机的工作原理 HARD—Ⅲ型为一种典型的无阀液压凿岩机,其工作原理见图6。图中①表示活塞处于回程开始的位置。前腔进油口全打开,后腔排油口也全打开,活塞在高压油的作用下向后移动。②表示活塞的回程运动。此时前后腔的进排油口均关闭,活塞
Second, the working principle of hydraulic rock drill Hydraulic rock drill according to the distribution method can be divided into two kinds of valve and valve. According to the structure of the valve can be divided into sets of valve and spool valve type, there are often before into the oil chamber and the back chamber often into the oil type. Now in accordance with the oil distribution methods to illustrate the working principle of several rock drill. 1. The working principle of valveless rock drill HARD-Ⅲ type is a typical valveless hydraulic rock drill, the working principle shown in Figure 6. The figure ① indicates that the piston is in the starting position of the return stroke. The front chamber oil inlet is fully open, the rear chamber drain port is also fully open, the piston moves backwards under the action of high pressure oil. ② said piston return movement. At this point before and after the cavity into the drain are closed, the piston