Causes of Compressor Failure?
1 Answers
The causes of compressor failure issues are as follows: 1. Liquid compression. Liquid refrigerant enters the compressor, causing liquid compression, which leads to the breakage of the scrolls of the moving and stationary plates. When liquid refrigerant enters the compressor chamber for compression, the incompressibility of the liquid subjects the scrolls to extreme lateral shear forces, resulting in the breakage of the scrolls of the moving and stationary plates and the seizing of the compressor. 2. Operation with insufficient refrigerant. When the compressor operates with insufficient refrigerant, the temperature at the center of the moving and stationary plates rises. Upon reaching a certain temperature, the end seal ring melts, and its melted material adheres between the moving and stationary plates, increasing friction. In severe cases, the moving and stationary plates may seize or break. 3. Poor oil return. Poor oil return in the system (oil shortage) prevents the compressor from delivering sufficient oil to all lubrication points, causing friction at these points to intensify progressively from bottom to top. The friction heats the moving plate bushing, eventually leading to its burning or even seizing. In severe cases, the bushing may wear out significantly and break. 4. Vacuum operation. During vacuum operation, the temperature at the center of the moving and stationary plates rises rapidly. The melting of the compressor end seal ring causes internal leakage of compressed gas, resulting in low discharge pressure. The thermal expansion of the scroll causes hard friction between the moving plate and the support surface, leading to compressor seizure in severe cases. 5. Poor system cleanliness. Refrigeration compressors may experience shaft seizure, poor insulation, copper plating, and other phenomena.
