为使径向柱塞式低速大扭矩液压马达转子得到匀速运动,定子导轨曲面一般多采用等加速曲线轨迹。这种曲线轨迹是由抛物线—阿基米德螺旋线组合而成,它包括零速区、等加速区、等速区和等减速区等四个区段(见图1)。零速区的轨迹是圆,等速区的轨迹是阿基米德螺旋线,此二者都可用机械运动的轨迹来范成。等加(减)速轨迹实际上是以转子旋转的角度为自变量的抛物线,目前尚不能用机械运动的轨迹来范成。这给加工制造带来一定的困 In order to make the radial plunger low-speed high-torque hydraulic motor rotor to get uniform motion, the stator guideway surface generally use equal acceleration curve trajectory. This curve trajectory is composed of parabola - Archimedes spiral combination, which includes zero speed zone, equal acceleration zone, constant speed zone and deceleration zone such as four sections (see Figure 1). The zero-speed zone’s trajectory is a circle, and the constant-velocity zone’s trajectory is the Archimedes spiral, both of which can be modeled by the path of mechanical motion. Equal add (minus) speed trajectory is actually a rotor angle of rotation as an independent variable parabola, can not yet use the mechanical movement of the trajectory to form. This brings some difficulties to processing and manufacturing