A high-speed plunger pump for new energy engineering machinery and a cylinder body thereof

By employing copper plating, stepped silencing chambers, and annular damping grooves in the axial piston pump, the problems of lubrication failure and noise vibration at low speeds are solved, achieving wide speed range and stable operation, thus meeting the electrification needs of engineering machinery.

CN122407537APending Publication Date: 2026-07-17JIANGSU ADVANCED CONSTR MASCH INNOVATION CENT LTD +1
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Patent Information

Application Number
CN202610807396.3
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-06-05
Publication Date
2026-07-17

AI Technical Summary

Technical Problem

Existing axial piston pumps suffer from lubrication failure at low speeds, severe noise and vibration, and vibration coupling, making it difficult to meet the wide speed range and stable operation requirements of electrified engineering machinery.

Method used

A copper-plated layer is used to form a distribution pair with the distribution plate. Combined with a stepped silencing cavity, annular damping groove and vibration damping ring, the lubrication characteristics are improved and vibration and noise are suppressed through dynamic and static pressure mixed lubrication and damping silencing and noise reduction.

Benefits of technology

It achieves stable lubrication at low speeds, reduces noise and vibration, adapts to the wide speed range requirements of engineering machinery, and improves operational stability and service life.

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Abstract

本发明公开了一种新能源工程机械用高速柱塞泵及其缸体,涉及柱塞泵技术领域,缸体相对配流盘的一面设置有主轴装配孔,相对配流盘的反面设置有柱塞孔;缸体底部设置有镀铜层,镀铜层与配流盘贴合形成配流副;柱塞孔底部开设有阶梯式消声腔,阶梯式消声腔为同轴且朝向缸体底部逐级扩径结构,阶梯式消声腔开设有连通主轴装配孔的阻尼微孔;缸体外壁沿周向开设有环形阻尼槽,环形阻尼槽内配置有减振环。本发明通过多结构协同创新,实现宽调速运行,同时从流体噪声和结构振动两个源头进行耦合降噪减振,且不改变缸体外形尺寸、不缩短柱塞配合段,保证缸体结构强度及装配精度,满足工程机械电动化的高能效、低噪、高可靠性需求。
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