径向低速大扭矩水液压马达定子曲线分析

提出了一种采用自然水(含海水和淡水)作为液压介质进行工作的径向低速大扭矩马达。与油压马达相比,摩擦、磨损、腐蚀等是水压马达面临的主要问题,而合适的定子曲线可以减少摩擦、磨损、水击等现象的发生。本文根据运动学理论对水液压马达的定子曲线进行了设计与分析。对幅角修正等加速运动规律和匀变加速修正等加速运动规律的加速度公式进行了修正。对9种不同类型运动规律的各区段幅角进行了设计,并结合曲线方程和水压马达的相关参数绘制出相应的定子曲线。综合分析了9种类型定子曲线下柱塞副(滚球与柱塞)的加速度、速度以及曲线压力角等特性,指出有过渡区的等加速运动规律曲线较适合于所研究的低速大扭矩水液压马达。

Analysis of stator curve of low speed high torque water hydraulic motor with radial piston

A novel low speed high torque hydraulic motor with radial piston,using seawater and fresh water as the hydraulic medium,is presented.Compared with hydraulic motor,friction,wear and corrosion are the main problems to be concerned.However,the friction,the wear and the water hammer could be reduced using the optimal stator curve.The stator curve of this motor is designed and analyzed based on the kinematics.The acceleration formulae of revised argument equal-acceleration motion and uniform variable accelerated modifier are revised.Every zone of argument of nine different motions is designed.On the basis of curve equations and hydraulic motor parameters,the stator curves are got.The acceleration,velocity of piston pairs(roller and piston) and pressure angle of nine stator curves are comprehensively analyzed.Results show that the transition region equal-acceleration motion curve is suitable for this motor.