The maintenance method of screw machine rotor shaft sleeve includes the following core steps and precautions:
1. Daily inspection and cleaning
Appearance inspection
Regularly check the surface of the shaft sleeve for wear, cracks or deformation, especially paying attention to the sealing surface in contact with the rotor.
Check for oil leakage and sludge accumulation around the shaft sleeve, which may indicate seal failure or insufficient lubrication.
.Cleaning and maintenance
Use a clean cloth to wipe off oil stains on the surface of the shaft sleeve to prevent impurities from entering the fitting gap.
. If the shaft sleeve is located near the oil system, it is necessary to ensure that the oil circuit is unobstructed to prevent carbon buildup and blockage.2. Lubrication Management
Lubricating Oil Selection
Special lubricating oil for screw air compressors must be used to avoid mixing different grades or types of oil and prevent chemical reactions from causing oil quality deterioration.
. Regularly check the oil quality. If the oil turns black, viscosity decreases, or contains impurities, it should be replaced immediately.Lubrication cycle
After running the new machine for 500 hours, the lubricating oil needs to be replaced for the first time, and then every 2000-3000 hours (refer to the equipment manual for details). Under harsh working conditions such as high temperature and high dust, the oil change cycle needs to be shortened.
Oil level monitoring
Check the oil level daily to ensure it is within the range of the oil gauge mark.
. Low oil level can cause insufficient lubrication of the shaft sleeve and accelerate wear.III. Seal Maintenance
Shaft seal inspection and replacement
Shaft seal is a key component to prevent oil leakage. If oil leakage is found, it should be checked immediately:
Assembly problems: For example, if the pulley is not tightly pressed against the shaft cover, it may cause wear on the O-ring.
. Oil quality issue: Poor quality oil or carbon buildup can cause lip seal failure. Vibration problem: Poor dynamic balance of the machine head causes excessive wear of the shaft seal. When replacing the shaft seal, special tools should be used to avoid damaging the lips, and original accessories should be preferred. O-ring maintenanceIf there is an O-ring between the shaft sleeve and the shaft, its elasticity should be checked regularly.
. If hardening, cracking or deformation occurs, it should be replaced in a timely manner.IV. Vibration and alignment adjustment
Dynamic balance inspection
Periodically dismantle and inspect the rotor for dynamic balance test. Unbalanced rotor can cause additional stress on the shaft sleeve, accelerating wear. Check whether the motor rotor and coupling are balanced to avoid vibration transmission to the shaft sleeve.
Alignment Calibration
Ensure the alignment accuracy between the motor and the compressor shaft, as excessive deviation can lead to eccentric wear of the shaft sleeve.
.Use a laser centering instrument or dial gauge for calibration, and tighten all connecting bolts after adjustment.
.Fifth, Temperature and Pressure Control
Temperature Monitoring
The operating temperature of the shaft sleeve should be controlled within a reasonable range (usually ≤ 80 ℃).
. High temperature will accelerate the oxidation of lubricating oil and reduce sealing performance. If the temperature rises abnormally, it is necessary to check whether the cooling system (such as the cooler and fan) is unobstructed.Pressure Management
Avoid excessive pressure fluctuations in the system, as sudden pressure changes can cause the shaft sleeve to bear impact loads, leading to fatigue damage.
. Regularly check the safety valve and pressure regulator to ensure their sensitive and reliable operation.VI. Professional Maintenance and Overhaul
Regular Overhaul
Based on the equipment's operating time (usually 2-3 years) or cumulative exhaust volume, perform major engine repairs:
Disassemble the engine and replace vulnerable parts such as shaft sleeves, bearings, and seals.
. Adjust the rotor clearance to ensure it meets the design requirements (such as radial clearance of 0.1mm and axial clearance of 0.1-0.7mm). Major repairs should be carried out by professional technicians to avoid damage to the shaft sleeve due to improper assembly.Fault dynamic management
Combining equipment operation data (such as vibration, temperature, pressure), establish a fault warning model to detect potential problems with the shaft sleeve in advance.
. Conduct root cause analysis (such as material defects and inadequate design) on frequently malfunctioning shaft sleeves and optimize maintenance strategies.