一种柱塞泵动力端

Power end of plunger pump

Abstract

The invention relates to a power end of a plunger pump. The power end comprises a body, a crankshaft and N groups of transmission components, wherein the crankshaft is arranged in the body, and the transmission components are driven to reciprocate radially by the crankshaft. The N groups of transmission components are connected with N plungers at a hydraulic end respectively, wherein N refers to a natural number. Two ends of the crankshaft are connected with the body through bearings respectively. The power end is characterized in that when N is larger than or equal to 2, fulcrum connection structures in quantity larger than or equal to 3 and smaller than or equal to N+1 are arranged between the crankshaft and the body, and the fulcrum connection structures include bearing connection structures between two ends of the crankshaft and the body and bearing connection structures between the crankshaft and the fixing support plates, in quantity larger than or equal to 1 and smaller than or equal to N-1, arranged in the body. Compared with the prior art, the power end has advantages that the service life of a mechanical link part between the body and the crankshaft can be effectively prolonged, and cracking and roughening of a hole end of a slide way of the body can be prevented.
本发明涉及一种柱塞泵动力端,包括机身,设置在机身内的曲轴,及由曲轴带动作径向往复运动的N组传动组件,N组传动组件分别与液力端的N个柱塞连接,其中N为自然数;曲轴的两端与机身之间分别通过轴承连接;其特征在于:当N≥2时,曲轴与机身之间设有大于等于三小于等于N+1个支点连接结构,这些支点连接结构包括:曲轴两端与机身之间的轴承连接结构,及设置在机身内部的大于等于1小于等于N‑1个固定支撑板与曲轴之间的轴承连接结构。与现有技术相比,本发明的优点在于:可以有效提高机身与曲轴之间的机械联接部件的寿命,还能防止机身滑道孔端部开裂发毛。

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