化工英文文献译.doc

Three Common Details of The Compressor Failure Analysis Compressor Fault Analysis (1) - motor burned Motor compressor (hereinafter referred to as the compressor) of the fault can be divided into motor failure and mechanical failure (including the crankshaft, connecting rod, piston, valve, cylinder head pad, etc.). Mechanical failure is often the motor overload or stall, is one of the main motor damage. Damage mainly to the motor stator winding insulation damage (short circuit) and the circuit and so on.Stator windire changes. Frequent starts and abnormal load, so that the test winding subjected to high temperature will reduce the magnet wire insulation. In addition, the compressed gas with the compression ratio will be required to increase the load and pressure increases. Therefore, the high temperature compressor for low temperature, or low compressor for high temperature, will affect the electrical load and heat, is not appropriate, will shorten the electrode life. Winding Need to draw particular attention to the two-stage compressor. In the two-stage compressor, back to the normal gas and oil directly back into the first grade (low grade) cylinder, compressed by the pressure of the cooling tube into the mectrical short circuit caused by metal shavings. Unfortunately, things tend to conspire a piece of the compressor in the boot of a problem when the news channels is often the oil burning. Severe wear of metal surfaces when the temperature is very high, while oil above 175 o C at the start of coking. System, if there is more moisture (vacuum pits not ideal, big oil and refrigerant water, negative pressure air into the return pipe burst, etc.), lubricants acid may occur. Acidic oil will corrode copper and winding insulation layer, on the one hand, it can cause copper plating phenomenon; on the other hand, this acid containing copper atoms very poor insulation properties of lubricating oil, provided the conditions for the winding circuit. 3. Contactor prob