End sealing and cooling structure for plunger

By using a multi-stage sealing structure and cooling channel design, combined with microstructure and pressure detection, the problem of traditional sealing structures being prone to failure in high-temperature and high-pressure environments has been solved, achieving reliable sealing and real-time monitoring, and improving the stability and maintenance efficiency of the sealing system.

CN121993394APending Publication Date: 2026-05-08SHANDONG UNIV
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Patent Information

Application Number
CN202610413997.6
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-03-31
Publication Date
2026-05-08

AI Technical Summary

Technical Problem

Traditional sealing structures are prone to failure in high-temperature and high-pressure environments and leaks cannot be detected in time, posing safety hazards and making it difficult to balance sealing performance and service life.

Method used

It adopts a multi-stage sealing structure and annular cooling channel design, combined with microstructure and cooling medium circulation, to reduce frictional resistance and monitor the sealing status in real time. Leakage monitoring is achieved by setting up a pressure detection device.

Benefits of technology

It achieves reliable sealing under high temperature and high pressure, reduces friction and wear, extends the life of the sealing structure, and prevents leakage from escalating into an accident through real-time monitoring and early warning functions.

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Abstract

The invention provides an end sealing and cooling structure for a plunger. The end sealing and cooling structure for the plunger comprises a sealing sleeve and the plunger arranged on the core portion of the sealing sleeve in a penetrating mode. A threaded sleeve, a water jacket, a three-stage sealing structure and a guide sleeve are sequentially arranged between the plunger and the sealing sleeve; annular cooling flow channels are formed between the water jacket and the plunger and between the water jacket and the sealing sleeve respectively. The annular cooling flow channels are communicated with a cooling medium inlet and a cooling medium outlet in the sealing sleeve. A pressure detection device is arranged on the quick-change connector at the cooling medium outlet; the three-stage sealing structure comprises three UN sealing rings and three supporting rings, and the UN sealing rings and the supporting rings are arranged at intervals; an annular groove is formed in the UN sealing ring, an annular protrusion is arranged on the supporting ring, and the annular protrusion is connected with the annular groove in an inserted mode. The problems that an existing sealing structure is prone to failure in the high-temperature and high-pressure environment, and sealing failure cannot be found in time are solved.
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