A rotary shaft seal assembly with allowance adjustment

By introducing an elastic structure of upper moving ring, lower moving ring, guide rod and spring into the rotary shaft seal assembly, the problem of decreased sealing performance is solved, adaptive sealing adjustment is achieved, maintenance costs and time are reduced, it can adapt to complex working conditions, and maintain good sealing effect.

CN224283461UActive Publication Date: 2026-05-26JIANGSU BOLIFEI AUTOMATION TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
JIANGSU BOLIFEI AUTOMATION TECH CO LTD
Filing Date
2025-06-18
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing rotary shaft seal assemblies lack a margin adjustment structure, which causes the sealing performance to gradually decline with wear, aging and equipment vibration, making them prone to leakage. Furthermore, replacement costs are high, affecting production efficiency.

Method used

It adopts an elastic structure consisting of an upper moving ring, a lower moving ring, a guide rod, and a spring. The elasticity of the spring is used to achieve the margin adjustment. Combined with the fixing method of silicone ring and clamp, it ensures that the sealing surface is always in contact, adapts to the radial offset and vibration of the rotating shaft, and enhances the sealing performance.

Benefits of technology

It enables adaptive adjustment of the sealing components, improves sealing performance, reduces maintenance costs and time, facilitates individual component replacement, adapts to complex working conditions, and maintains good sealing performance.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN224283461U_ABST
    Figure CN224283461U_ABST
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Abstract

This utility model relates to a rotary shaft seal, specifically a rotary shaft seal assembly with adjustable allowance. It includes a mounting base and an end cap, with a silicone ring disposed between the mounting base and the end cap. A clamp is fitted onto the outer wall of the silicone ring to secure it. An upper moving ring and a lower moving ring are respectively provided on the upper and lower end faces of the clamp. The bottom of the upper moving ring has several first grooves, and the lower moving ring has several second grooves corresponding to the first grooves. A guide rod is fixedly disposed between each of the first and second grooves. Several cavities are provided at the positions of the clamp corresponding to the guide rods, and springs are fitted onto the guide rods located within the cavities. Through the above technical solution, this utility model solves the problem of insufficient allowance adjustment in rotary shaft seal assemblies.
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