WK—4型电铲其旋转零件:轴承、齿轮的润滑是由柱塞油泵供油,柱塞油泵供油的可靠性,直接影响着电铲的作业效率。原产品结构复杂、装配困难、维护使用都不方便,特别是出油管采用塑胶管,由于结构尺寸较小,要使管子两端紧固很不容易,加之塑胶管在油的浸泡下变质,当通油时经常产生滴漏现象,影响作业效率和文明生产。我们对旋转柱塞油泵进行了局部改进,见图1。将原油泵的泵盖、泵体、出油管等零件组成完整的油泵体,见图2,油泵体是采用 HT20—40铸铁,内孔φ35~(+0.027)研磨后与柱塞配合,间隙应小于0.03毫米,逆止阀,出油管所构成的油路,在泵体内加工出来,使油泵结构 WK-4 electric shovel rotating parts: bearing, gear lubrication is supplied by the plunger pump, piston pump fuel supply reliability, directly affect the shovel operating efficiency. The original product structure is complex, assembly is difficult, maintenance is not convenient, especially the use of plastic tubing out of the tubing, due to the smaller size of the structure, so that the tube is not easy to fasten the ends, coupled with the plastic tube soaked in oil deterioration, Oil dripping often occurs when the phenomenon, affecting operating efficiency and civilized production. We made a partial improvement on the rotary piston pump, shown in Figure 1. The oil pump pump cover, pump body, the oil pipe and other components form a complete pump body, shown in Figure 2, the pump body is made of HT20-40 cast iron, bore φ35 ~ (+0.027) after grinding with the plunger, the gap should Less than 0.03 mm, check valve, the oil pipe constituted by the oil, processed in the pump body, so that the pump structure