A full-gap adjustable magneto-rheological power transmission device

Abstract

The invention discloses a full-gap adjustable magneto-rheological power transmission device, which adopts a cladding transmission structure and includes a power input part and a power output part. The power input part includes an active part of the power transmission device, a small annular excitation coil of the active part, The power input shaft, the power output part includes the driven part of the power transmission device, the axial field coil on the left side of the driven part, the circumferential field coil, the small annular field coil of the driven part, the power output shaft, and the axial field on the right side of the driven part. The excitation coil, the active part of the power transmission device and the driven part of the power transmission device are provided with a small flow channel to form a full-gap transmission space. The magnetorheological fluid flows into the working space of the power input shaft and the power output shaft through the small flow channel. Realize full gap transmission, small size, fast response, can effectively compensate the relative displacement of two axes, have obvious buffering and shock absorption effects, adjustable and controllable working torque and good overload protection function, avoiding the working interface from being exposed to the external environment .

Description

technical field [0001] The invention relates to a magneto-rheological fluid power transmission device, in particular to a full-gap adjustable magneto-rheological power transmission device, which belongs to the technical field of mechanical power transmission. Background technique [0002] The power transmission device is a mechanical device used in a mechanical system to firmly connect the driving shaft and the driven shaft in different mechanisms to rotate together and transmit motion and torque. Smart material—magnetorheological fluid is mainly composed of soft magnetic particles, base carrier liquid and additives wrapped on the surface of soft magnetic particles. It has unique rheological properties. The response speed changes from liquid to semi-solid, and this change is reversible. The magnetorheological fluid power transmission device is a kind of magnetorheological fluid as the working medium, which uses the unique rheological characteristics of the magnetorheologica...

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Problems solved by technology

The Chinese patent "A Sawtooth Magnetorheological Power Transmission Device" (Application No.: CN201220280549.7) published on December 26, 2012 has a groove in the cylindrical box and an electromagnetic coil in the groove , the active disk and the driven disk are provided with intermeshing triangular structure teeth, which can control the shear yield strength of the magnetorheological fluid by controlling the strength of the external magnetic field, so that the viscous force of the magnetorheological fluid is continuous within a certain range Change to achieve the effect of transmitting large torque, and easy to control, but the structure is more complicated, difficult to disassemble

The Chinese patent "Compact cycloidal magneto-rheological power transmission device" (publication number: CN106499747B) published on October 9, 2018, the device is designed with the outer cycloidal sleeve as a combination of cycloidal wheel and inner magnetic ring The hollow barrel-shaped structure composed of fixed connections, its two ends are respectively connected with the rotating flange and the power transmission device at the output end through magnetic isolation stainless steel screws, and the inner rotating part and the outer rotating part are connected through bearings, which has the advantages of compact structure, low manufacturing cost and low maintenance. It has the advantages of convenient maintenance and the ability to transmit torque, but due to the limitation of the working space, it cannot transmit large torque, and at the same time, it is impossible to locally adjust the magnetic field in the working space

Both of the above two inventions have the disadvantages that it is difficult to transmit large torque and cannot fine-tune the magnetic field in the working space

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