Motor stator-scraping-rotor monitoring protector and using method thereof

Abstract

The invention provides a motor stator-scraping-rotor monitoring protector and a using method thereof, and relates to the technical field of motor devices. The protector comprises a detection device, acleaning device and a control system. The detection device and the cleaning device are arranged in a gap between a stator and a rotor, and the detection device and the cleaning device are both electrically connected with the control system. The detection device comprises a signal transmitter and a signal receiver, and the signal transmitter and the signal receiver are fixedly installed at the twoends in a motor respectively, and located in the gap between the stator and the rotor; the transmitting center of the signal transmitter and the sensing center of the signal receiver are on a same straight line and parallel to a central rotary shaft of the motor. By means of the motor stator-scraping-rotor monitoring protector, oil contaminations and debris in the gap between the stator and the rotor can be cleaned, the motor stator-scraping-rotor problem is solved, and when the stator-scraping-rotor phenomenon happens, a power supply of the motor is switched off, the motor is protected, andthe using method is simple, easy to operate, safe and reliable.

Description

technical field [0001] The invention relates to the technical field of motor equipment, in particular to a motor bore-sweeping monitoring protector and a use method thereof. Background technique [0002] When the motor rotates, the phenomenon that the outer ring of the rotor collides with the inner circle of the stator is called "motor sweeping". According to the specific conditions of the sweeping chamber, the sweeping chamber is divided into two types: real sweeping and virtual sweeping. The so-called real sweep means that the iron cores of the stator and rotor actually rub against each other; the so-called virtual sweep means that the iron cores of the stator and rotor do not actually rub against each other, but the rotor rubs against the raised insulators or oily impurities in the inner circle of the stator. Severe sweeping phenomenon will cause high temperature in the inner circle of the stator, making the insulation on the surface of the slot become brittle at high tem...

AI Technical Summary

Problems solved by technology

Severe sweeping phenomenon will cause high temperature in the inner circle of the stator, making the insulation on the surface of the slot become brittle at high temperature, causing the winding to be grounded or short-circuited. At the same time, real sweeping can also cause increased motor vibration and noise, and make the electrical Performance drop

At present, the protection mechanism of motor sweeping mainly consists of connecting the stator and rotor and adding current detection. When the stator and rotor actually contact, the current becomes larger, thereby cutting off the power supply of the motor. When the current does not change much during "sweeping", the current cannot be detected, the winding does not heat up significantly, and the thermal protection switch does not operate, so that the motor cannot be effectively protected.

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