A double-acting axial piston hydraulic motor

By designing a double-acting axial piston motor, each piston can perform work throughout its entire stroke, improving the power-to-weight ratio and maintaining continuous operation in case of failure. This solves the application limitations of traditional motors in weight-sensitive scenarios and enhances reliability.

CN116771587BActive Publication Date: 2026-06-09JINCHENG NANJING ELECTROMECHANICAL HYDRAULIC PRESSURE ENG RES CENT AVIATION IND OF CHINA
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
JINCHENG NANJING ELECTROMECHANICAL HYDRAULIC PRESSURE ENG RES CENT AVIATION IND OF CHINA
Filing Date
2023-05-25
Publication Date
2026-06-09

AI Technical Summary

Technical Problem

In traditional axial piston motors, the piston only performs work during the extension process, and losses occur during the shortening process, resulting in a low power-to-weight ratio, which limits its application in weight-sensitive scenarios.

Method used

Design a double-acting axial piston motor. By rationally distributing high and low pressure working media, each piston can perform work throughout the entire process. The motor also adopts a dual-redundant drive to improve reliability. The design includes a combination structure of a swashplate, a distribution shaft, a torque-limiting drive shaft, and a synchronous transmission gear train.

Benefits of technology

This improves the motor's power-to-weight ratio and ensures continuous operation even in the event of a distributor shaft jamming failure, thus enhancing product reliability.

✦ Generated by Eureka AI based on patent content.

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    Figure CN116771587B_ABST
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Abstract

The present application belongs to the field of aircraft hydraulic system, and discloses a double-acting axial plunger motor, which comprises a cylinder body, a piston, an inclined disc, a flow distribution shaft, a torque limiting transmission shaft and a synchronous transmission gear train; at least three pistons are uniformly circumferential through the cylinder body and can reciprocate axially relative to the cylinder body; the piston is a structure of bidirectional piston rod and middle piston head, and the cylinder body is provided with two independent hydraulic chambers corresponding to the double axial direction of each piston head; two inclined discs are pressed on the two ends of the piston and rotate with the regular reciprocating motion of the piston, the rotation of the inclined disc drives the synchronous transmission gear train on the outside of the inclined disc to move, also drives the torque limiting transmission shaft on the inside of the inclined disc to rotate, the torque limiting transmission shaft is connected and drives the flow distribution shaft arranged on the axis of the cylinder body to rotate, and the flow distribution shaft is provided with an interface to connect the external hydraulic source and the hydraulic chamber in the cylinder body; with the rotation of the flow distribution shaft, the hydraulic pressure is regularly supplied to different hydraulic chambers, so that the two inclined discs continuously rotate.
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