Oil return structure of aluminum swash plate type large-displacement compressor

By using a segmented dual oil return channel design in the cylinder block, the problems of lubricating oil retention and high flow resistance in the traditional swashplate large displacement compressor oil return structure are solved, achieving efficient circulation and stable supply of lubricating oil, and improving the overall lubrication effect and reliability of the machine.

CN224282868UActive Publication Date: 2026-05-26JIANGSU COMPRISON NEW ENERGY TECH CO LTD
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Patent Information

Application Number
CN202521465617.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-07-14
Publication Date
2026-05-26
Estimated Expiration
2035-07-14

AI Technical Summary

Technical Problem

The traditional swashplate large-displacement compressor has a single oil return channel, which leads to lubricating oil retention, high flow resistance, and poor lubrication. Especially when the compressor is installed at an angle, oil accumulates on the non-oil return side end cover, resulting in insufficient bearing lubrication and local overheating, which affects the reliability and efficiency of the whole machine.

Method used

The cylinder adopts a segmented dual oil return channel design. The first oil return channel connects directly from the end cover joint surface to the bottom of the working chamber, and the second oil return channel connects to the oil storage pool. This enables rapid introduction of lubrication area and storage of excess oil, thereby enhancing the stability of oil film coverage and continuous lubrication capability.

Benefits of technology

It significantly improves the uniformity and continuity of oil film coverage on key moving parts, avoids abnormal wear and overheating failure caused by local oil shortage, improves the stability and reuse efficiency of system oil quantity, and reduces oil churning loss and cooling efficiency decline.

✦ Generated by Eureka AI based on patent content.
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Abstract

The utility model relates to the technical field of compressors, in particular to an oil return structure of an aluminum swash plate type large-discharge-capacity compressor, which comprises a compression working assembly and an oil return assembly, the compression working assembly comprises a rotating shaft, the rotating shaft is provided with an oil outlet channel along the length direction, and the outer wall is provided with a plurality of oil outlet holes communicated with the oil outlet channel; a working cavity is formed in the middle of the cylinder body, the compression working assembly is sleeved with the cylinder body, and the rotating shaft penetrates through the cylinder body; one side of the cylinder body is provided with an oil storage pool; the two end covers are mounted on the two end faces of the cylinder body respectively; wherein the cylinder body is divided into a first oil return section and a second oil return section; the first oil return section is provided with a first oil return hole channel which is communicated to the working cavity from the joint surface of the first oil return section and the end cover; the second oil return section is provided with a second oil return hole channel which is communicated to the oil storage pool from the joint face of the second oil return section and the end cover. The oil circulation effect in the compressor is effectively improved, the lubricating effect is enhanced, and the oil return function is improved.
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