论文部分内容阅读
7655凿岩机是在YT25凿岩机基础上改进的,它采用气、水联动,气腿快速退回,气压调节等机构。性能良好,使用广泛。但在使用中,当操纵手柄转至凿岩机运转位置时,凿岩机不运转,而在地上碰几下就会立即正常运转,这是什么原因呢? 在正常情况下,活塞冲击运动如图1所示。当操纵手柄转至凿岩机运转位置时,压气从操纵开关孔道1、经柄体气室2、棘轮孔道3、配气孔道4、环形气室5和配气活门的套孔6进入气缸活塞上方,推动活塞下行,开始冲击行程。当活塞下端面A超过排气口后,活
The 7655 rock drill is improved on the basis of the YT25 rock drill. It uses gas, water linkage, air leg rapid return, pressure adjustment and other institutions. Good performance, widely used. However, in use, when the joystick is transferred to the rock drilling machine operation position, the rock driller does not operate, but when it touches a few times on the ground, it will immediately run normally. What is the reason? Under normal circumstances, the piston impact motion is shown in Figure 1. . When the joystick is transferred to the drilling machine operation position, the pressure gas enters the cylinder piston from the manipulation switch hole 1, the handle air chamber 2, the ratchet hole 3, the air distribution hole 4, the annular air chamber 5 and the valve hole 6 of the valve opening. Push the piston down and start the stroke. When the lower end face of piston A exceeds the exhaust port,