Self-cooling mechanical sealing device for high-temperature pump

By designing a self-cooling mechanical seal on a high-temperature pump, the pump shaft rotation drives the cooling airflow. Combined with a high thermal conductivity filling layer and a heat-insulating sleeve, the problem of dependence on external systems in existing technologies is solved, achieving efficient, compact, and reliable cooling effects and extending the life of the sealing device.

CN122083031APending Publication Date: 2026-05-26ANHUI WOLONG PUMP & VALVE CO LTD
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Patent Information

Application Number
CN202610535574.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-04-22
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing high-temperature pump mechanical seal cooling technology relies on external systems, which are complex, occupy a large space, consume a lot of energy, and have long heat conduction paths, resulting in insufficient seal reliability and lifespan.

Method used

A self-cooling mechanical seal device is designed by fixing a cooling fan to the pump shaft and making it rotate synchronously with the pump shaft. The mechanical energy of the pump shaft drives the cooling airflow. Combined with a high thermal conductivity filling layer and a heat insulation sleeve, a compact heat conduction and heat dissipation channel is constructed to achieve active cooling.

Benefits of technology

It achieves self-driven, zero-external-dependent, and highly efficient cooling, reducing the risk of system failure, improving the reliability and lifespan of the seal, with a compact structure and no additional energy consumption. The temperature of the sealing end face is maintained within a safe range, preventing liquid film vaporization and material aging.

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Abstract

The self-cooling mechanical sealing device for the high-temperature pump comprises a pump shaft, an impeller, a movable ring assembly, a static ring assembly, a heat dissipation module and a heat dissipation fan are sequentially and coaxially arranged on the pump shaft along the axis of the pump shaft, the movable ring assembly and the pump shaft synchronously rotate and are matched to form a sealing end face, the static ring assembly is fixedly installed, and the heat dissipation module is fixedly installed on the pump shaft. The side, deviating from the sealing end face, of the static ring assembly is tightly connected with the heat dissipation module in an attached mode, a high-heat-conduction filling layer is arranged between the static ring assembly and the heat dissipation module, heat dissipation fins extending in the radial direction are integrally formed on the radial outer surface of the heat dissipation module, and a heat insulation sleeve is arranged between the heat dissipation module and the pump shaft. The heat dissipation fan is fixedly installed on the pump shaft and located on the axial outer side of the heat dissipation module. Integration of power and an external cooling medium is not needed, efficient active self-cooling can be achieved, the reliability of the mechanical seal under the high-temperature working condition is remarkably improved, and the service life of the mechanical seal under the high-temperature working condition is remarkably prolonged.
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