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Semi-hermetic compressors are frequently seen in air conditioning and refrigeration systems.
A popular positive displacement compressor used to supply compressed air in a variety of industrial applications is the rotary screw compressor.
Ensure the compressor is isolated from the system and depressurized. ,Drain the oil and coolant from the compressor.
Preparation
– Ensure the compressor is isolated from the system and depressurized.
– Drain the oil and coolant from the compressor.
Disassembly
– Remove the outer casing and access panels.
– Disconnect electrical connections.
– Remove the screws or bolts holding the compressor components together.
– Separate the rotor assembly from the casing.
Inspection
– Check the rotor and casing for wear, damage, or signs of overheating.
– Inspect bearings, seals, and gaskets for wear and replace if necessary.
– Measure clearances and tolerances to ensure they are within specifications.
Cleaning
– Clean all components thoroughly using an appropriate solvent to remove dirt, debris, and old lubricants.
– Ensure all parts are completely dry before reassembly.
Replacement
– Replace any damaged or worn parts, including bearings, seals, gaskets, and O-rings.
– Use genuine manufacturer parts to ensure proper fit and function.
Reassembly
– Reassemble the compressor components in the reverse order of disassembly.
– Use a torque wrench to tighten bolts and screws to the manufacturer’s specifications.
– Ensure all electrical connections are secure.
Testing
– Conduct a performance test to ensure the compressor operates correctly.
– Check for leaks, abnormal noises, and vibrations.
– Monitor temperature and pressure levels to ensure they are within acceptable limits.
Final Checks
– Fill the compressor with the recommended lubricant and coolant.
– Verify that all components are properly installed and secured.
– Conduct a final inspection to ensure everything is in order before putting the compressor back into service.
Documentation
– Keep a detailed record of the overhaul process, including parts replaced, measurements taken,
and test results.
– This documentation can be valuable for future maintenance and troubleshooting.
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