Multi-plate magnetorheological soft start device

Abstract

The invention discloses a multi-plate magnetorheological soft start device, which is characterized in that: a right shaft is in threaded connection with a right sealing disk; the outer ring of the right sealing disk is provided with a key groove which is matched with internal teeth of internal friction plates; a left shaft is in threaded connection with a left sealing disk; the left sealing disk is connected with a sealing ring through a screw; the inner ring of the sealing ring is provided with a key groove which is matched with external teeth of external friction plates; the internal friction plate and the external friction plates are alternately arranged; a magnet exciting coil is arranged between a left end plate and a right end plate; and the upper part of the right end plate is provided with a fluid injecting bolt, and the lower part of the right end plate is provided with a fluid discharging bolt. Magnetorheological fluid is taken as a working medium, the in-plate magnetic induction density is regulated by controlling the current of the magnet exciting coil, and the transmission torque is changed, so that the controlled soft start of heavy mechanical equipment is realized. The multi-plate magnetorheological soft start device has a hollow symmetrical structure, has high heat dissipation and high reliability and is convenient to operate.

Description

technical field [0001] The invention relates to a soft start device, in particular to a multi-piece magneto-rheological soft start device, which is suitable for the controllable soft start process of long-distance, large-capacity, high-power belt conveyors and scraper machines . Background technique [0002] Magnetorheological fluid is a new type of intelligent material with development prospects and engineering application value. It is mainly composed of soft magnetic particles, base carrier fluid and additives coated on the particle surface to prevent particle settlement. When there is no external magnetic field, the performance It is in a free flowing state; under the action of an external magnetic field, the rheological properties change sharply and become semi-solid, which has the advantages of continuous, reversible, rapid and easy to control, so it has been more and more widely used in machinery and other related fields . [0003] Magnetorheological devices using ma...

AI Technical Summary

Problems solved by technology

In terms of magneto-rheological soft-starter, CN1648483A discloses a magneto-rheological soft-starter, in which the active part is made into a cavity, and a follower whose shape matches it is placed in it, and the torque that the device can transfer is only It can be adjusted by the current of the electromagnetic coil, so the transmission torque is small and the adjustment range is narrow; CN101029664A discloses a magneto-rheological fluid soft start device, the housing and the input shaft are connected as one, and the excitation coil, and The wire connected to the excitation coil rotates with the housing, which makes it inconvenient to use

[0004] From the above analysis, it can be seen that the application of magnetorheological fluid is mainly concentrated in brakes and clutches, and the application in soft start is less, and the existing magnetorheological soft start device has the following disadvantages: complex magnetic structure, cumbersome assembly, disassembly, etc. It is inconvenient to install; the transmission torque is small, which can only be adjusted by changing the current of the excitation coil; during the working process, the excitation coil and the wire connected to the excitation coil rotate with the casing, resulting in inconvenient use; it is difficult to apply to large volumes , long-distance, high-power belt conveyor and scraper machine controllable soft start process

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