Radial piston hydraulic motor working principle, when the pressure oil enters the bottom of the plunger in the cylinder body through the window of the fixed oil distribution shaft 4, the plunger extends outward and tightly pushes against the inner wall of the stator, due to the existence of an eccentric distance between the stator and the cylinder body. At the contact between the plunger and the stator, the reaction force of the stator on the plunger can be divided into two components. When the oil pressure acting on the bottom of the plunger is p, the diameter of the plunger is d, and the angle between the force and is X, the force produces a torque on the cylinder, causing the cylinder to rotate. The cylinder then outputs torque and speed outward through the drive shaft connected at the end face.
Radial piston hydraulic motors are mostly used for low speed and high torque.
