Lubrication characteristics of dual piston ring in bent-axis type piston pumps
Lubrication characteristics of dual piston ring in bent-axis type piston pumps
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DOI：
10.1007/s12206-010-0342-3
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发表时间：
2010-06
影响因子：
1.6
通讯作者：
I. Cho;Il-Hyun Beak;Jae-Cheon Jo;Ju-mi Park;Seok-Hyung Oh;Jae-Youn Jung
中科院分区：
文献类型：
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作者：
I. Cho;Il-Hyun Beak;Jae-Cheon Jo;Ju-mi Park;Seok-Hyung Oh;Jae-Youn Jung
由活塞杆驱动的弯轴式活塞泵是由活塞杆带动气缸体工作，因此活塞杆的锥角和气缸体与轴的回转角是重要的设计因素。如果这些因素不能满足优化设计的条件，气缸孔与活塞之间的摩擦损失就会增加，泵可能无法在严重摩擦磨损的条件下工作。由于活塞在气缸孔内作高速往复运动，同时绕自身轴线和气缸体中心自转，导致气缸孔与活塞之间的泄漏，导致体积效率降低。因此，为了防止这种情况，活塞环被设计在活塞的末端，活塞环与气缸孔之间的摩擦特性对活塞泵的性能影响很大，需要进一步研究。为此，本文对弯轴式柱塞泵活塞环与缸套之间的油膜厚度、压力分布和摩擦力进行了弹流润滑分析。分析结果表明，摩擦力受转速和排气压力的影响。
The bent-axis type of piston pump driven by the piston rod works by the piston rod driving the cylinder block; because of this the taper angle of the piston rod and the swivel angle between the cylinder block and the shaft are important design factors. If these factors cannot satisfy the conditions for optimum design, the friction loss between the cylinder bore and the piston increases, and the pump can fail to work under conditions of severe friction and wear. Since the piston reciprocates in the cylinder bore with high velocity, at the same time rotating on its own axis and revolving on the center of the cylinder block, a decrease of the volume efficiency is generated because of the leakage between the cylinder bore and the piston. Therefore, to prevent this, the piston ring is designed to be at the end of the piston, and the friction characteristics between the piston ring and the cylinder bore require further research due to their great influence on the performance of the piston pump. Thus, in this paper, the elastohydrodynamic lubrication (EHL) analysis of the film thickness, the pressure distribution, and the friction force, have been studied between the piston ring and the cylinder bore in the bent-axis type of piston pump. The analyzed results show that the friction force is influenced by the rotating speed and the discharge pressure.