A cycloidal hydraulic motor converts hydraulic energy into mechanical energy by using high-pressure hydraulic oil to drive the rotor along the cycloidal cavity of the stator. Its structure includes a stator, rotor, distribution plate, and output shaft. Hydraulic oil enters the working chamber between the stator and rotor through the distribution plate, causing the rotor to oscillate and drive the output shaft to rotate. Due to the slight tooth difference engagement between the stator and rotor, the rotor performs oscillatory motion within the stator, generating continuous rotational movement, and eventually discharges the hydraulic oil through the outlet. Cycloidal hydraulic motors are characterized by high torque, low-speed stability, and compact design, making them widely used in construction machinery, agricultural machinery, and industrial equipment.
Basic Structure
Stator (Outer Cycloidal Wheel): The stator has an internal complex cycloidal cavity.
Rotor (Inner Cycloidal Wheel): The rotor meshes with the stator with a slight tooth difference.
Distribution Plate: Contains a series of channels for controlling the entry and exit of hydraulic oil.
Output Shaft: Drives the external load through the rotation of the rotor.
Bearings and Seals: Support the rotation of the rotor and prevent hydraulic oil leakage.
Working Principle
Hydraulic Oil Input: High-pressure hydraulic oil enters the working chamber between the stator and rotor through the distribution plate.
Rotor Rotation: The hydraulic oil pushes the rotor to rotate along the stator’s cycloidal cavity. Due to the slight tooth difference meshing, the relative motion between the rotor and stator generates oscillation, converting it into rotational motion of the output shaft.
Hydraulic Oil Discharge: After completing its work, the hydraulic oil exits the motor through the distribution plate and returns to the hydraulic system’s oil tank.
Detailed Working Process
Oil Inlet Stage:
High-pressure hydraulic oil enters the motor through the inlet of the distribution plate and fills the chamber between the stator and rotor.
The hydraulic oil pushes the rotor to start rotating.
Rotor Oscillation:
Due to the slight tooth difference meshing between the stator and rotor, the rotor performs an oscillatory motion within the stator.
This oscillatory motion is converted into continuous rotational motion on the rotor’s shaft.
Output Stage:
The rotor’s rotation drives the output shaft, producing mechanical energy output.
As the rotor completes one rotation, each working chamber between the stator and rotor undergoes an oil intake and discharge process.
Oil Discharge Stage:
After completing its work, the hydraulic oil exits the motor through the outlet of the distribution plate and returns to the hydraulic system’s oil tank. The discharged hydraulic oil is cooled and filtered before re-entering the hydraulic system for circulation.
Key Characteristics
High Torque: Produces high torque at low speeds, suitable for applications requiring high torque.
Low-Speed Stability: Exhibits good stability at low speeds, suitable for precise control applications.
Compact Design: Features a compact structure and small size, ideal for space-constrained applications.
Application Scenarios
Construction Machinery: Such as excavators, bulldozers, and drilling rigs.
Agricultural Machinery: Such as combine harvesters and seeders.
Industrial Equipment: Such as cranes, conveyors, and hydraulic tools.
Post time: Aug-08-2024