Synchronous permanent magnet coupler with damping device

Abstract

The invention belongs to transmission equipment, and relates to a synchronous permanent magnet coupler with a damping device. One of an input connecting disc and an output connecting disc is fixedly connected with an inner rotor, the other one of the input connecting disc and the output connecting disc is fixedly connected with an outer rotor, the outer rotor sleeves outside the inner rotor, and the outer rotor and the inner rotor are coaxially arranged; the inner rotor is provided with a plurality of axially-formed inner mounting grooves, the inner mounting grooves are formed in the circumferential direction, the inner rotor magnetic steel is inserted into the inner mounting grooves, a plurality of axially-arranged inner mounting holes are formed in an annular area between inner rotor magnetic steel in an inner rotor and an inner rotor outer ring, and damping devices made of conductive metal materials are arranged in the inner mounting holes. And the end parts of all the damping devices are in short-circuit connection. The permanent magnet coupler has the effects of mechanical decoupling and vibration isolation, and the dynamic performance of the synchronous permanent magnet coupler is improved. In addition, the invention also provides permanent magnet couplers with another two structures according to the principle.

Description

technical field [0001] The invention belongs to transmission equipment, especially a synchronous permanent magnetic coupler with a damping device. Background technique [0002] The permanent magnetic coupling is a device that uses a magnetic field as a medium to achieve torque transmission. According to different operating principles, it can be divided into two types: eddy current permanent magnetic coupling and synchronous permanent magnetic coupling. [0003] When the eddy current permanent magnet coupling is running, the conductor disk cuts the air gap magnetic field generated by the permanent magnet rotor disk, and the eddy current induction magnetic field is generated on the conductor disk. The interaction between the induction magnetic field and the air gap magnetic field realizes the transmission of torque, but during the operation There is a slip between the input and output terminals, resulting in a waste of energy. [0004] At the moment when the motor starts, the...

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Problems solved by technology

[0007] Under the above three working conditions, the synchronous permanent magnet coupling has a slip in the process of dynamic self-adaptation, correspondingly, eddy current loss will also be generated, resulting in the temperature rise of the coupling itself, and more serious is in the process of overshoot The output torque of the motor will change continuously, and the motor will also be in the working condition of continuous switching between motor and power generation, which will affect the service life of the motor and the power quality of the local power grid

[0008] Moreover, when the load of the existing synchronous permanent magnet coupling is relatively heavy, it needs to match the frequency conversion control technology to slow down the starting speed of the motor. Otherwise, while the speed of the input end rises extremely rapidly, the speed of the output end cannot respond quickly under the influence of the inertial load , once the elastic angle of the magnetic steel on the input and output rotors exceeds the limit value, the equipment will stop running completely, and this startup fails. At the same time, due to the slip speed between the two rotors, the magnetic steel cuts the magnetic field in the air gap. The eddy current loss is generated inside, which leads to the increase of the temperature of the magnetic steel, and the synchronous permanent magnetic coupling will burn out in a short time, causing serious production accidents

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