A water hydraulic motor with adaptive static pressure balance eccentric flow distribution device

By using an adaptive hydrostatic balance eccentric distribution device and a hydraulic disc spring composite bidirectional tensioning structure, the problem of sealing failure and wear in traditional water hydraulic motors under high pressure and low speed conditions is solved. This achieves zero-gap floating seal and high-efficiency sealing on the distribution plate end face, improving the reliability and lifespan of the motor.

CN122407448APending Publication Date: 2026-07-17XUZHOU COLLEGE OF INDAL TECH
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
XUZHOU COLLEGE OF INDAL TECH
Filing Date
2026-05-18
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

When traditional water-hydraulic motors use concentric distribution plates in high-pressure, low-viscosity environments, they face the problems of high contact specific pressure and low sliding speed, which causes the distribution plate to tilt slightly, resulting in seal failure and premature wear, affecting reliability and long-term service capability.

Method used

An adaptive hydrostatic balance eccentric distribution device is adopted, combined with a hydraulic and disc spring composite bidirectional tensioning structure, to achieve bidirectional zero-gap floating seal on the end face of the distribution plate. Through the cooperation of high-pressure selection component and bidirectional elastic pre-tightening component, the axial thrust is adjusted in real time to counteract the slight tilt of the eccentric distribution plate.

Benefits of technology

It effectively reduces media leakage, extends component life, improves working efficiency, ensures the continuity of the micro water film on the distribution surface, and enhances the overall operational reliability and volumetric efficiency.

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Abstract

本发明公开了一种具有自适应静压平衡偏心配流装置的水液压马达,包括前端盖、后端盖、柱塞壳体、偏心轴、配流七星轮及偏心配流盘装置;偏心配流盘装置包括配流盘外壳体和分体式同轴嵌套的配流盘套件,三者固定连接并与配流盘套件间形成第一配流腔;配流盘套件的三个配流件间分别形成内侧、外反馈腔,中间工作配流件设第二配流腔和高压选通组件,内反馈腔与第二配流腔始终连通,外反馈腔通过高压选通组件选择性连通,配合双向弹性预紧件实现配流盘套件前后端面正反转双向零间隙浮动密封。实现了马达正反转性能一致,减少泄漏和磨损,延长使用寿命,提高工作效率,特别适用于水液压系统工况。
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