Types and characteristics of radial piston motor

创建于05.09

Types and characteristics of radial piston motor

(1) Classification radial piston motors are basically low-speed high torque hydraulic motors, which have a wide variety. The detailed classification is shown in Figure n. The rotor of the single acting motor rotates for one circle, and each plunger reciprocates once. Its main shaft is an eccentric shaft. The multi action motor uses the cam ring with special inner curve as the guide rail. When the rotor rotates for one circle, each plunger works repeatedly. The number of curves is the number of action.

(2) Compared with other hydraulic motors, the characteristics of radial piston motor are shown in the table below.

Characteristics of radial piston motor

Main advantages	主要缺点
①轴向尺寸相对较小 ②排量大、转速低 ③低速稳定性好，可在10r/min以下平稳运转，有得可低到1.5r/min ④输出转矩大，可达几千甚至几万牛·米 ⑤可直接与其拖动的工作机构链接而不需要减速装置	①径向尺寸大 ②结构复杂，体积较大，功率密度低

The characteristics of radial piston motor in the table above

Single acting radial piston motor has the advantages of simple structure, good processability and low cost. However, in the case of the same displacement, compared with multi acting motor, the structure size of single acting radial piston motor is larger, and there is a larger non-equilibrium radial force acting on the rotor. Bearing with larger capacity is required. At the same time, there are pulsations of output speed and torque. Low speed stability is not as good as multi acting motor, but it is generally allowed It has higher speed than multi action motor.

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