Principle Of Radial Plunger Pump
The drive torque is transmitted by the drive shaft through the cross coupling to the radial hydraulic cylinder rotor, and the stator is free from other lateral forces. The rotor is mounted on the distribution axis. The radial plunger in the rotor is attached to the eccentric travel stator by a sliding shoe balanced by static pressure. The plunger is connected to the shoe ball hinge and locked by the spring. Two holding rings hold the slipper on the travel stator.
When the pump rotates, it relies on centrifugal force and liquid pressure on the inner surface. When the rotor rotates, the plunger will reciprocate due to the eccentricity, and its travel is twice the eccentricity. The eccentricity of the stator can be adjusted by two plungers at opposite radial positions on the pump body.
The flow of oil in and out through the pump body and the flow channel on the distribution shaft, and controlled by the oil suction port on the distribution shaft, the liquid pressure generated in the pump body is absorbed by the static pressure balance surface. The overbalance pressure compensation method is adopted for the static pressure balance of the friction pair to form an open loop control. The bearing of the drive shaft supports only and is not subject to other external forces.