Self-lubricating hydraulic opening machine

CN224315905UActive Publication Date: 2026-06-02YICHANG YINPENG FINE ENG TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
YICHANG YINPENG FINE ENG TECH CO LTD
Filing Date
2025-08-29
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

The lack of lubrication between the piston and piston support sleeve in existing hydraulic opening machines leads to severe friction and wear, which can easily cause seizing failure and affect the normal use of the equipment.

Method used

An inner oil groove and an outer oil groove are provided on the piston support sleeve, and they are connected to the lubrication oil passage in the cylinder through a low-pressure oil passage to achieve self-lubrication. The piston and piston support sleeve are directly lubricated by the low-pressure oil provided by the hydraulic opening machine.

Benefits of technology

It effectively reduces friction and wear between the piston and piston support sleeve, avoids equipment failure, improves equipment reliability and service life, and reduces maintenance costs.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224315905U_ABST
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Abstract

This utility model relates to the field of metallurgical equipment technology, and in particular to a self-lubricating hydraulic opening machine. The cylinder body has a cavity extending through both ends, with a piston support sleeve installed on the inner side of each end of the cavity. The two piston support sleeves are fixed within the cavity by positioning sleeves installed on their outer sides. The piston passes through the positioning sleeves and piston support sleeves. Low-pressure oil passages for returning oil to the return oil tank are provided within the cylinder body, positioning sleeves, and piston support sleeves. The piston support sleeves have interconnected inner and outer oil grooves; the inner oil groove is located on the inner wall of the piston support sleeve, and the outer oil groove is located on the outer wall of the piston support sleeve. The inner oil groove is connected to the surface of the piston. A first lubrication oil passage is provided within the cylinder body, and the low-pressure oil passage connects to the outer oil groove through the first lubrication oil passage. This self-lubricating hydraulic opening machine does not require additional lubrication components, achieving self-lubrication and offering advantages of high efficiency and low cost.
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