Original 3002600350 Atlas Copco MOTOR NON DRIVE SIDE KIT FOR OIL INJECTED SCREW COMPRESSORS

Maintenance for the non-driven side motor components of Atlas Copco oil-injected screw compressors

Regular inspection

Observe whether there is oil leakage or seepage at the non-driven side end cover ， check for abnormal temperature rise， and use a sound detector to determine if there is any abnormal noise.

Check the tightness of the end cover bolts to ensure reliable sealing.

Bear maintenance

Replace the bearing lubricating grease according to the cycle specified in the motor manual， clean the bearing chamber， and avoid mixing new and old lubricating grease.

When replacing the bearings， ensure the model is matched， and install them using heat fitting or special tools to avoid damaging the bearings by knocking.

Sensor calibration

Regularly calibrate the temperature sensor to ensure detection accuracy； check if the connection terminals are oxidized or loose， and clean or tighten them if necessary.

Heat dissipation maintenance

新闻内容

The main components and functions of the non-driven side motor assembly of the Atlas Copco oil-injected screw compressor

End cover and bearing assembly

Non-driven end cover: Fixed the motor stator, supports the bearings, seals the interior of the motor to prevent dust, moisture, etc. from entering.

Bearings: Usually use deep groove ball bearings or cylindrical roller bearings, support the non-driven end of the motor rotor to ensure coaxiality during high-speed rotation, reduce vibration and friction.

Heat dissipation structure

Some motors on the non-driven side end cover are designed with heat dissipation ribs or fan installation positions, combined with the built-in fan to form an air circulation, allowing the heat generated by the motor to be dissipated through the end cover to the environment, avoiding motor overheating.

Detection and protection elements

Temperature sensor: Embedded in the non-driven side winding or bearing area, monitors the motor temperature in real time, triggers protection and stops the machine when the temperature exceeds the limit.

Bearing vibration sensor: Equipped in some high-end models, monitors the vibration amplitude of the non-driven side bearing, predicts the wear condition of the bearing. Junction box

Some motors place the wiring box on the non-drive side, which is convenient for connecting power lines and control circuits and avoids interference with the main components such as the host piping and pulley on the drive side.

Common Faults and Causes

Excessive bearing heat or abnormal noise

The bearing lubricating grease has dried up, deteriorated, or has an improper filling amount;

The bearing is installed too tightly, with insufficient clearance, or has exceeded the tolerance for the fit with the shaft;

The rotor is unbalanced and the shaft is bent, resulting in uneven force on the bearings.

Failure of end cover sealing

The end cover sealing ring is aged or damaged;

The end cover bolts are loose, causing gaps to form, and dust and water vapor enter the motor interior.

Abnormal temperature detection

The wiring of the temperature sensor is loose or disconnected;

The sensor probe does not make good contact with the winding, causing distorted detection values.