Product Features

The YMS hydraulic motor is an internal-curve, multi-acting radial piston motor. Its main features are as follows:

Modular Design: The overall structure adopts a modular design with a plate-type stacking configuration. It is divided into four parts: the mechanical output module, hydraulic function module, oil distribution module, and mechanical braking module, facilitating compatibility with various mainstream optimized supporting systems.

High Efficiency: It adopts flat oil distribution technology, which has low sensitivity to pressure and temperature. This technology automatically compensates for wear between the oil distribution friction pairs, ensuring the motor maintains high volumetric efficiency for a long time. Meanwhile, the adoption of a roller-plunger structure simplifies the force transmission mechanism and improves mechanical efficiency.

High Operating Pressure and Excellent Low-Speed Performance: The stator curve design has been optimized to ensure output torque and stable rotational speed while reducing stator contact stress. Additionally, the stator is manufactured using new materials and processes, significantly increasing the operating pressure of the hydraulic motor, with a maximum pressure of up to 40 MPa. Due to the low inertia of the force transmission mechanism, the plunger pair is equipped with a sealed piston ring, and the roller stopper is made of friction-reducing material, the motor achieves high starting efficiency and excellent low-speed performance.

Ability to Withstand Radial and Axial Loads: With an independently arranged mechanical output module, as well as a large-diameter output shaft and bearings, the motor can withstand large axial and radial forces. It can be directly connected to a gear output or installed directly on the drive wheel of a vehicle.

Optional Mechanical Brake: It adopts a modular plate-type structure, which allows the integration of a mechanical braking device to achieve direct and safe service braking and parking braking of the output shaft.

Motor Displacement Control: Motors are categorized into single-displacement motors and dual-displacement motors. Single-displacement motors operate with full displacement output. Dual-displacement motors can realize both full-displacement and half-displacement output through control valve regulation, enabling speed control.

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Translation of Hydraulic Motor-Related Text

Devices that convert energy into rotational motion are all called motors. A hydraulic motor is an energy conversion device that transforms the pressure energy of a liquid medium into rotational motion, and converts the hydraulic energy provided by a hydraulic pump into mechanical energy. Hydraulic motors have high power density; under the condition of the same output power, their weight and size are only 5%–20% of those of DC motors, with a relatively light weight. Therefore, they have a small moment of inertia, and excel in high frequency of starting, braking, and reverse operation, as well as low-speed stability. Additionally, stepless speed regulation can be easily implemented for them.

How to Select a Hydraulic Motor That Meets Your Requirements:

The basic parameters of a hydraulic motor include operating pressure, flow rate, displacement, and power. When selecting an ideal motor for low-speed operation of a hydraulic motor, the most crucial factor is to check whether the output power you need matches the hydraulic pump you currently have. For imported hydraulic motors, you can also consider the selection of displacement: the displacement V can be calculated by dividing the flow rate Q of the system by the required rotational speed n of the motor. Then, select the model based on the displacement, refer to the product specifications, and verify whether the torque of the motor meets your requirements.