Liquid flow circulation type magneto-rheological brake with eccentric strengthening function

By adopting an eccentrically reinforced fluid circulation structure in the magnetorheological brake and utilizing the cam motion principle to achieve eccentric extrusion of the brake disc, the problems of insufficient braking torque and heating are solved, and the output and stability of the braking torque are improved.

CN120739813AActive Publication Date: 2025-10-03EAST CHINA JIAOTONG UNIVERSITY
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Patent Information

Application Number
CN202511240310.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-09-02
Publication Date
2025-10-03
Estimated Expiration
2045-09-02

AI Technical Summary

Technical Problem

Existing magnetorheological brakes have problems such as insufficient output braking torque and degradation of rheological characteristics and mechanical properties due to viscous dissipation of magnetorheological fluid and heating of the excitation coil.

Method used

The eccentrically reinforced fluid circulation structure is adopted, and the cam motion principle is used to make the brake disc produce eccentric extrusion, which promotes the flow and heat dissipation of the magnetorheological fluid, increases the shear yield stress of the magnetorheological fluid, and achieves greater braking torque output.

Benefits of technology

The stability and controllability of the output braking torque of the magnetorheological brake are improved, the influence of temperature rise on the performance of the magnetorheological fluid is reduced, and a greater and more stable braking effect is achieved.

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Abstract

The liquid flow circulation type magnetorheological brake with the eccentric strengthening function comprises an input shaft barrel and a cam shaft, a cylinder is arranged at one end of the input shaft barrel, the cam shaft is coaxially arranged in the cylinder, a first through disc is arranged on the end face, back to the input shaft barrel, of the cam shaft, and a second through disc is arranged on the end face, back to the cam shaft, of the input shaft barrel. A first guide rail and a second guide rail are oppositely arranged on the end face, facing the second through disc, of the first through disc, the first guide rail is slidably connected with a first sliding assembly, the second guide rail is slidably connected with a second sliding assembly, a first brake disc is arranged on the cam shaft, and a second brake disc is arranged on the input shaft barrel. The magnetorheological fluid generates an extrusion strengthening effect, the shear yield stress of the magnetorheological fluid is improved, flowing of the magnetorheological fluid is promoted, heat dissipation of the magnetorheological fluid is facilitated, the influence of temperature rise on the performance of the magnetorheological fluid is reduced, and larger and more stable braking torque is output.
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Citation Information

Patent Citations

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  • Fluid brake device and valve timing adjusting device

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