斜板式アキシアルピストンモータの起動・微速時における球継手部の摩擦特性

抄録

It has become very important to improve hydraulic motor efficency, especially in the starting and low-speed ranges, for finer hydraulic operation. From this point of view, this report aimed to provide technical data to help improve a swashplate-type axial piston motor's performance, particularly concerning the friction characteristics of a ball joint. The effects on its friction characteristics are experimentally examined with regard to swashplate angle, supply pressure, surface roughness, and friction coefficient, etc. The results show that the friction moment of a ball joint is almost never affected by the piston phase angle, and oil temperature, but depends heavily on supply pressure, and that the friction moment strongly affects oil film thickness and leakage flow.