来源：http://www.jnmcd.com 发布时间：2019-06-19 浏览：次
When the motor breaks down, the maintenance personnel should first understand the meticulous "condition" as the doctor sees the doctor. That is to understand the whole process of equipment operation status, equipment medical record and fault occurrence to equipment operators or users.
1. Looking at the scene
According to the situation asked, carefully check the external conditions or operating conditions of the equipment. If the shape and color of the motor are abnormal.
(2) Look at the materials
It is necessary to carefully consult the wiring diagram of the motor related to the faults, analyze which part of the control circuit is related to the faults that have appeared before, and what shortcomings have been produced in order to have the phenomena mentioned above. Then, in the analysis of the resolution to examine those central authorities, gradually check down to find out where the fault is.
The noise of a motor running with illness usually changes, and the difference between noise and normal equipment operation can often be distinguished by listening carefully. For example, the factors affecting the sound of motors are:
Temperature. Some of the noise of the motor appears or strengthens with the increase of temperature, while others weaken or disappear with the increase of temperature.
Load. Load has a great influence on sound. Sound increases with the increase of load, which is the general rule of sound.
(3) Smooth. No matter what noise, when the smooth condition is not good, it usually sounds seriously.
(4) Stethoscope. It can use screwdriver, metal rod, thin metal tube, etc. to touch the test point with stethoscope, and the sound becomes louder for diagnosis. Auscultation with stethoscope directly touching the noisy part is called "real listening" and auscultation with ears separated by a certain interval is called "false hearing". The two methods should be used together.
4. Nose Smell
Applying human's sense of smell to distinguish faults according to the breath produced by the motor. If there are overheating, short circuit and breakdown problems, it is possible to smell burning.
5. Hand touch
Touch the relevant parts of the equipment by hand and distinguish faults according to temperature and vibration. In practice, we should also pay attention to abide by safety regulations and control equipment characteristics, control touch methods and skills, touch touch, touch can not touch anything can not be confused. Hands should be properly touched so as not to endanger personal safety and damage equipment.
Stop checking the motor with instrumentation. According to the size of some electrical parameters measured by the instrument and compared with the normal data, the cause and location of the fault can be confirmed.