Permanent magnet couplings for belt drives

Abstract

The invention discloses a permanent magnetic coupler for belt transmission. The permanent magnetic coupler comprises a conductor rotor, a permanent magnetic rotor, a belt pulley and an input shaft sleeve used for being connected with a motor. The input shaft sleeve comprises a near end close to the motor and a far end far from the motor; the permanent magnetic rotor is fixed on the outer cylindrical surface of the far end of the input shaft sleeve; one end of the belt pulley is fixedly connected with the conductor rotor; and the belt pulley is supported on the outer cylindrical surface of the near end of the input shaft sleeve through a bearing. The permanent magnetic coupler has a soft start function and better vibration damping performance, can improve the power utilization efficiency of the motor, has a more compact structure, a short axial cantilever and good axial stiffness, and can bear larger load.

Description

technical field [0001] The invention relates to a permanent magnet coupler, in particular to a permanent magnet coupler device for belt transmission. Background technique [0002] The traditional belt drive is mainly composed of a motor, a belt and a load. Pulleys are installed at the output end of the motor and the input end of the load, and the output of the motor is transmitted to the load through the connection between the belt and the pulley. Belt transmission has the following characteristics: 1) Simple structure, suitable for transmission occasions with a large center distance between two shafts; 2) Smooth transmission without noise, capable of buffering and absorbing vibration; 3) When overloaded, the belt will slip on the pulley to prevent The weak parts are damaged and play a protective role, so they are widely used. [0003] However, there are many problems in the traditional belt connection transmission, which are mainly reflected in the following aspects: [0...

AI Technical Summary

Problems solved by technology

[0004] 1. The traditional motor adopts a hard start method. The large current at start-up has a large impact on the grid, which affects the quality of power supply of the grid; damages the motor insulation and reduces the life of the motor; produces a large impact on the motor stator coil and rotor squirrel cage, It will cause the motor to be tight, the coil to be deformed, and the squirrel cage to be broken, etc.

[0005] 2. When the motor is started, the tension on the belt suddenly increases, which shortens the service life of the belt

[0006] 3. There is a usual mechanical connection between the motor and the load, so the vibration of the load will be transmitted to the motor, which will affect the service life of the motor

[0007] 4. The power utilization rate of the motor is low. In order to ensure that it can cope with different working conditions, the motor type selection is often greater than the actual required power, and the motor is often in a light load state during operation. The constant torque operation of the motor will inevitably cause waste of electric energy.

However, this structure is suitable for installation on the pulley on the load side, not suitable for installation on the pulley on the motor side, and cannot well overcome the impact generated when the motor starts

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