Through the interrogation, eye, ear, nose, hand touch, table test six diagnostic methods to find the abnormal situation of the motor, "table test" is the application of electrical meters to measure certain motor parameters, after comparison with normal values, Determine the cause and location of the fault. Specifically, Dalan Motor Xiaobian tells everyone what is the "six diagnosis" method for the motor failure of the hydraulic oil pump.
1, ask questions
When the motor fails, the maintenance personnel should be the same as the doctor. First, you need to understand the detailed "conditions." That is, the device operator or the user is aware of the device usage, the medical history of the device, and the entire process of the failure.
2, see
1, look at the scene
Carefully review the external conditions or operating conditions of the equipment, depending on what is being asked. Such as the shape and color of the motor are abnormal.
2, see the information
The motor wiring diagram related to the fault must be carefully checked to analyze which part of the control line has occurred and what is wrong with it. Then, after the analysis decides to check those places, you can find out where the fault is by stepping through it.
3, listening
The noise of a motor running with a disease usually changes. It is often possible to distinguish between it and the normal equipment operation. For example, the factors that affect the sound of the motor are:
1 temperature. Some of the sound of the motor appears or increases with increasing temperature, while some sounds weaken or disappear with increasing temperature.
2 load. The load has a great influence on the sound, and the sound increases as the load increases. This is the general law of sound.
3 lubrication. No matter what the sound is, when the lubrication conditions are not good, it usually sounds loud.
4 stethoscopes. A screwdriver, a metal rod, a thin metal tube, etc. can be used to touch the test point with a stethoscope, and the sound becomes louder for diagnosis. Stethoscope with a direct contact in the sounding part of the auscultation, called "real listening", separated by a distance from the ear auscultation, called "virtual listening", the two methods should be used together.
4, nose smell
Using the human sense of smell, the fault is judged based on the odor generated by the motor. If it is overheated, short-circuited, or breakdown, it may smell burnt.
5, hand touch
Touch the relevant part of the device with your hand and judge the fault according to the temperature and vibration. In the actual operation, you should also pay attention to the relevant safety regulations and the characteristics of the equipment, and master the methods and techniques of touching (touching), and the touch of the touch can not be touched. Hand touch should be appropriate so as not to endanger personal safety and damage equipment.
6, test
Check the motor with the instrumentation. According to the meter to measure the size of some electrical parameters, after comparing with the normal data, to determine the cause and location of the fault.
----- Editor-in-Chief: Dalan Oil Pump Motor 02-Procurement Consultant
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