武钢金山店铁矿王豹山露采车间岩石较硬,YQ150A型潜孔钻常出故障。最为突出的是回转机构的钻杆接头与减速器下面的轴承压盖的联接部位(见图)。原接头只靠6个M18的螺栓联接传递主钻杆扭矩,还承受一定的冲击应力。6个螺桂经常被切断、扭弯、损坏螺纹。螺栓消耗较大,特别是轴承压盖上的6个内螺纹孔易损坏,更换轴承压盖耽误工时,给生产带来一定影响。我们把轴承压盖与钻杆接头改用花键联接,即能定心,又能传递钻杆的全部扭矩。把 Wushan Jinshan shop iron ore Wang Leopard mining shop hard rock, YQ150A DTH drill hole often fails. The most prominent is the connection point of the drill pipe joint of the slewing mechanism and the bearing gland under the reducer (see figure). The original connector only rely on the 6 M18 bolt transfer transmission of the main drill torque, but also to withstand some impact stress. Six screws are often cut, twisted, damaged thread. Bolt consumption is large, especially the 6 on the bearing gland on the threaded hole easy to damage, replace the bearing gland delay working hours, to produce a certain impact. We use the spline connection of the bearing gland and drill pipe joint, that is, can center, but also to pass the full torque drill pipe. Put