Frame-type sealed hydraulic swing motor

Abstract

The invention provides a hydraulic swing motor. The airtightness of the motor is improved since the sealing mode that blades of the motor adopt frame type sealing and shaft ends adopt combined sealing is adopted. The hydraulic swing motor comprises a cylinder, two fixed blades, a front cylinder cover, a rear cylinder cover, a main shaft and two movable blades, wherein the two fixed blades are arranged in the cylinder and form an included angle of 180 degrees; the front cylinder cover and the rear cylinder cover are arranged at the two ends of the cylinder correspondingly; the main shaft penetrates through the cylinder, the front cylinder cover and the rear cylinder cover and is provided with an oil in / out way; and the two movable blades are arranged on the main shaft and form an included angle of 180 degrees. The two movable blades and the two fixed blades divide the interior of the cylinder into four cavities which are used as working cavities for oil to convert pressure potential energy into mechanical energy, and combined sealing parts are arranged on the end face of the front cylinder cover and the end face of the rear cylinder cover and used for preventing oil in the cavities from flowing out along the main shaft. The two movable blades and the two fixed blades are provided with frame type sealing parts which are used for preventing oil in the cavities from communicating.

Description

technical field [0001] The present invention relates to a hydraulic swing motor, and more particularly to a hydraulic swing motor with a frame-type seal. Background technique [0002] The hydraulic motor is used as an actuator in the hydraulic servo system to convert the hydraulic energy of the input high-pressure oil into mechanical energy and drive the load to rotate. Compared with electric motors, hydraulic motors have higher power density, can achieve greater torque and higher frequency response, and are often used in the aerospace field. As a type of hydraulic motor, the double-vane swing motor can only output limited rotation angles, but because it has two pairs of cavities, it can output greater torque and has a compact structure and higher power density. It is often used for flight sports Simulator, the actuator of the steering gear load simulator. The sealing performance of the hydraulic actuator has an important impact on the performance of the entire system, and...

AI Technical Summary

Problems solved by technology

The increase of leakage and friction will lead to a decrease in the dynamic characteristics of the hydraulic servo system, a decrease in stiffness, and an increase in damping

Due to the difficulty of sealing the moving and fixed blades of the double-blade swing motor, its application is limited, so a double-blade swing motor with good sealing performance is required

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