Regarding chiller maintenance
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Dear friends: Hello everyone! Our company uses municipal 12.5-ton large refrigeration screw compressors; now, half a year after a major repair, the compressor head is making abnormal noises. What could be the problem? Thank you!
Lubrication is required; the parts that need lubrication in screw-type refrigerators include the rotating meshing areas of the male and female screws (also known as the rotor pairs)； The relative sliding surface between the rotating screw and the housing ； Sliding bearings before and after the screw ； The balance piston of the driving screw and the mechanical seal friction surfaces at the shaft end. Oil ports communicating with the pressure oil are provided at all the aforementioned lubrication locations. Oil holes of different sizes, spaced at certain intervals, provided on the energy control valve or the housing allow the lubricating pressure oil to be sprayed directly onto the rotor. This not only cools and lubricates the rotor and the housing but also seals the gaps in the moving parts, thereby reducing leaks of compressed gas and lowering operating noise.
Possible reasons include: poor assembly； Poor lubrication, such as insufficient oil pressure or degraded oil ； There are foreign objects in the system, such as rust and sediment ； Bearing wear.
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