A permanent magnet magneto-rheological fluid transmission device with multi-level adjustment

Abstract

The invention discloses a multi-stage-adjustable permanent magnet type magnetorheological fluid transmission device. The multi-level-adjustable permanent magnet type magnetorheological fluid transmission device comprises a magnetic field adjustment control system and a magnetorheological fluid transmission system; the magnetic field adjustment control system includes a magnetic conductive plate (5) and a shell (6) which are welded together, and magnets, wherein the magnets include a magnet I (8-1), a magnet II (8-2), a magnet III (8-3) and a magnet IV (8-4) which are distributed from top to bottom sequentially; and the magnetorheological fluid transmission system includes a driving shaft (1), a bearing (2), a bearing seat (3), a driving disc I(9-1), a driving disc II (9-2), a driven disc II (11) and a driven shaft (13). The multi-stage-adjustable permanent magnet type magnetorheological fluid transmission device of the invention is not required to be electrified, and can be applied to situations having high security requirements and requirements for large magnetic fields, can adjust the magnitude of the magnetic fields in a multi-stage manner so as to adapt to different situations.

Description

technical field [0001] The invention relates to a permanent magnet type magneto-rheological fluid transmission device, in particular to a permanent magnet type magneto-rheological fluid transmission device capable of multi-level adjustment. Background technique [0002] Magneto-rheological fluid is a new type of intelligent material. Under the action of an external magnetic field, its rheological properties will change drastically, and its viscosity will increase in a short period of time (milliseconds), and it will change from a liquid with good rheological properties to a similar Solid state, and once the external magnetic field is lost, it will return to a flowable liquid. In recent years, due to its superior rheological properties, it has been widely used in mechanical transmission. [0003] The traditional mechanical transmission has defects such as large impact, high noise, inconvenient control of speed or force adjustment, and short service life. In recent years, wi...

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Problems solved by technology

[0005] 1. For transmission devices that use energized coils to generate magnetic fields, the magnetic induction intensity generated by the coils is small. Increasing the magnetic field by increasing the current will cause the coils to overheat, causing safety problems. This method cannot be used especially in coal mines and other safety requirements. High occasions;

[0006] 2. For the permanent magnet transmission device, the size of the magnetic field cannot be freely controlled, which greatly limits its use

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