Discontinuous H-shaped static pressure oil groove, friction pair component and hydraulic equipment

By using a discontinuous H-shaped hydrostatic oil groove design, the problem of finding the global optimal solution for the hydrostatic oil groove is solved, achieving high load-bearing capacity, low friction, and long service life of the friction pair, and optimizing lubrication performance.

CN121111883APending Publication Date: 2025-12-12ZHEJIANG UNIV
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Patent Information

Application Number
CN202511468123.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-10-14
Publication Date
2025-12-12

AI Technical Summary

Technical Problem

Existing hydrostatic oil tank structures are unable to achieve a globally optimal solution, resulting in problems such as insufficient bearing capacity of the friction pair, high friction torque, severe wear, and short lifespan.

Method used

The design employs a discontinuous H-shaped hydrostatic oil groove, which achieves independent distributed lubrication through a topological structure in which the transverse and longitudinal grooves are not connected. This reduces frictional torque, increases load-bearing capacity, and extends plunger life.

Benefits of technology

It significantly reduces frictional torque, increases load-bearing capacity, extends plunger life, optimizes anti-leakage performance, and achieves precise distribution of lubricating oil, ensuring low-friction operation of the friction pair.

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Abstract

The invention provides a discontinuous H-shaped static pressure oil groove, a friction pair component and hydraulic equipment, and belongs to the technical field of hydraulic transmission equipment. The static pressure oil groove is in a discontinuous H shape after being unfolded and comprises two longitudinal groove bodies which are both in a semi-arc shape, bent inwards and distributed along the cambered surface of a plunger-roller friction pair. And the transverse groove body is linear, is positioned in the middle of the two longitudinal groove bodies, and is not connected with the two longitudinal groove bodies. Through the discontinuous H-shaped topological structure formed by not connecting the transverse groove bodies and the longitudinal groove bodies, compared with a traditional static pressure oil groove, through independent distributed lubrication, the friction torque can be greatly reduced, the bearing capacity is improved, and the service life of a plunger is prolonged.
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