Pump wear parts are mainly drive shaft and bushing, passive gear center hole and shaft pin, pump shell lumen and gear, gear face and pump cover, etc.

齿轮泵的磨损部位主要有主动轴与衬套、被动齿轮中心孔与轴销、泵壳内腔与齿轮、齿轮端面与泵盖等。

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It proposes measures of improving piston structure design and adopts the structure of cast aluminum bronze embedded in the hole in the piston pin bushing.

据此提出了活塞结构改进设计措施，采用了在活塞销孔内嵌入铸铝青铜衬套结构。

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