1. Compressor maintenance case analysis Recently, a customer sent a screw compressor to the factory for maintenance. The customer reported that the machine had a problem of low oil pressure and shut down, and then the equipment became stuck. After disassembly and inspection by the maintenance department, it was found that the radial and axial bearings at the exhaust end of the male rotor were damaged due to lack of oil, and the oil holes in the oil injection plate were also blocked. It was analyzed that the direct cause of bearing damage was that the customer failed to replace the old oil filter in time during use, causing the remaining impurities inside the oil filter to enter the oil system as the equipment was running. Since the fuel injection plate is located at the end of the oil system and the diameter of the injection hole is small, these impurities can easily block the injection hole, causing a series of failures.