Hydraulic pump with pump oil reversing structure and method thereof

By setting up a buffer chamber and a negative pressure suction structure inside the hydraulic pump, the problems of instantaneous pressure and vibration during hydraulic pump reversal are solved, achieving rapid and effective oil intake and impurity separation, simplifying the maintenance process, and improving the stability and reliability of the equipment.

CN121205928BActive Publication Date: 2026-06-02HANGZHOU XIAOSHAN EAST HYDRAULIC PARTS CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
HANGZHOU XIAOSHAN EAST HYDRAULIC PARTS CO LTD
Filing Date
2025-06-26
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing hydraulic pumps suffer from excessive instantaneous pressure and vibration during reversal, especially due to leakage and oil accumulation caused by sealing problems between the reversing valve and the pump body, resulting in a sudden increase in pressure.

Method used

A buffer chamber is set inside the pump body of the hydraulic pump. The suction component, driven by the linear drive component, creates negative pressure to draw in excess oil, reducing the instantaneous pressure during reversal. The oil outlet and conical spray hole design flush the gear assembly and remove the attached substances.

Benefits of technology

It effectively reduces the vibration and instantaneous pressure of the hydraulic pump during reversal, improves sealing performance, avoids the complex maintenance process of traditional hydraulic pumps, and shortens equipment downtime.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN121205928B_ABST
    Figure CN121205928B_ABST
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Abstract

The application relates to the technical field of hydraulic pumps, in particular to a hydraulic pump with a pump-oil reversing structure and a method thereof, which comprises a pump body, the inside of the pump body is provided with two gear assemblies, the two gear assemblies are in meshing motion with each other, drive the oil to move, when the two gear assemblies move, the oil can flow from one oil inlet and outlet to the other, achieving the function of pumping oil; a buffer cavity is arranged on the pump body, the inside of the buffer cavity is provided with a suction element, the suction element is driven by a linear driving element to form a negative pressure in the inside of the buffer cavity. When the pump body needs to change the direction of the oil movement, the suction element in the inside of the buffer cavity moves to form a negative pressure space in the inside of the buffer cavity, the excess oil in the oil inlet area is sucked into the inside of the buffer cavity, thereby reducing the movement resistance of the gear assemblies during the reversing, and reducing the vibration and instantaneous pressure of the pump body.
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