Totally-closed foreign material invasion prevention torque-limited permanent magnet coupler

Abstract

The invention provides a totally-closed foreign material invasion prevention torque-limited permanent magnet coupler. The totally-closed foreign material invasion prevention torque-limited permanent magnet coupler comprises a conductor rotor assembly, a permanent magnet rotor assembly, an input shaft and an output shaft, wherein the conductor rotor assembly is connected with the input shaft, and the conductor rotor assembly comprises a magnetic conductor disc and a nonmagnetic metal disc which are coaxially arranged; the permanent magnet rotor assembly is connected to the output shaft, and the output shaft is used for carrying out circumferential limiting on the permanent magnet rotor assembly; the permanent magnet rotor assembly comprises a permanent magnet disc and a first axial limiting structure, and the first axial limiting structure is connected to the permanent magnet disc; the first axial limiting structure comprises a limiting sliding block, a clamping groove corresponding to the limiting sliding block is formed in the output shaft, and one end of the limiting sliding block slides into the clamping groove to carry out axial limiting on the permanent magnet rotor assembly or leave away from the clamping groove; the input shaft is used for driving the conductor rotor assembly to rotate, axial limiting between the permanent magnet disc and the magnetic conductor disc is carried out by a second limiting structure, the conductor rotor assembly is used for driving the permanent magnet rotor assembly to rotate through attracting magnetic force between the magnetic conductor disc and the permanent magnet disc, and the permanent magnet rotor assembly is used for driving the output shaft to rotate.

Description

technical field [0001] The invention relates to the field of transmission technology, in particular to a fully enclosed moment-limiting permanent magnetic coupler capable of isolating dust, iron ore and other particles and having an overload protection function. Background technique [0002] In the field of mechanical transmission systems, mechanical couplings are widely used. In some occasions, hydraulic couplings are used, and mechanical couplings are used. The centering requirements are relatively high during use, and the impact on the motor during startup is large. The motor is protected, and the main body of the coupling is exposed to the environment, so it is not suitable for use in environments with many particles such as dust and ore. The hydraulic coupling starts relatively smoothly and can protect the motor, but it needs regular oil injection, which is cumbersome to maintain and has a high failure rate. The oil leakage of the hydraulic coupling is likely to cause e...

AI Technical Summary

Problems solved by technology

[0002] In the field of mechanical transmission systems, mechanical couplings are widely used. In some occasions, hydraulic couplings are used, and mechanical couplings are used. The centering requirements are relatively high during use, and the impact on the motor during startup is large. The motor is protected, and the main body of the coupling is exposed to the environment, so it is not suitable for use in environments with many particles such as dust and ore

The hydraulic coupling starts relatively smoothly and can protect the motor, but it needs regular oil injection, which is cumbersome to maintain and has a high failure rate. The oil leakage of the hydraulic coupling is likely to cause environmental pollution

[0003] In the case of transporting bulk particles such as belt conveyors, due to the large number of particles such as dust and iron ore on site, it is easy to cause adverse effects on the connection parts of the mechanical structure. The invention patent (publication number: CN 101465591A) discloses an axial Permanent magnet synchronous coupling coupling, the conductor disk is installed on the motor shaft, the permanent disk is installed on the output shaft, the air gap is fixed by the top screw and the anti-friction pad, and the fixed torque is transmitted, but the entire permanent magnet coupling is exposed to the environment In the process, various dust particles and magnetically permeable impurities are easy to enter the interior, which affects the reliability of the internal structure and the service life of the bearing.

On the other hand, in some special occasions, the coupling can only be connected to the input shaft end or the output shaft end, requiring the coupling to be supported only at one end, and the utility model patent (publication number: CN201550013U) discloses a method that can realize The permanent magnet eddy current coupling for motor protection, the permanent magnet rotating body and the motor, the conductive rotating body and the load of this permanent magnet eddy current coupling are all connected by flanges and expansion sleeves. The centering requirements are high during installation and need to be adjusted The concentricity between the inner and outer rotors, while the inner and outer rotors are respectively suspended from the motor shaft and the load shaft end, the support rigidity is not good

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