Do you know the correct installation method for screw air compressor lead screw support bearings?

For the installation of screw air compressor lead screw support bearings, there are two main problems, one is the installation method of the lead screw support bearings, and the other is the cleaning method of the bearing. Practical experience has shown that the installation and cleaning methods of the bearings have a great influence on the noise and vibration of the motor. Proper installation and cleaning methods can reduce the lead screw support bearings noise and vibration of the motor. Conversely, incorrect installation and cleaning methods are the main cause of vibration, noise, lead screw support bearings damage, or reduced service life. Therefore, the rolling bearing cleaning and installation must be carefully and carefully carried out in the correct way.

First, the preparation of the screw air compressor lead screw support bearings assembly

1. The site where the bearing is assembled should be cleaned to prevent dust or small particles from entering the bearing.

2. Check the shape and position tolerance of the shaft, which does not meet the requirements and cannot be assembled. Also check the fillet size at the root of the shoulder and the perpendicularity of the shoulder to the shaft. Generally, the fillet radius of the root of the shoulder should be smaller than the radius of the fillet of the inner ring of the bearing, so that the bearing can abut the shoulder.

3. The surface of the parts should be cleaned with gasoline or kerosene. No rust, spots or solid particles are allowed.

Second, the screw air compressor lead screw support bearings set process lead screw support bearings and shaft assembly methods are hot and cold sets of two methods.

However, the hot sleeve is generally used because the inner ring of the bearing and the journal are generally over-fitted, and it is easy to put on after heating.

1. Oil heating method The oil heating method is to heat the inner ring of the lead screw support bearings or the separable bearing into the oil tank containing the transformer oil. The temperature of the oil is 80-100 ° C, and the heating time is 20-40 min. In order to prevent the bearing from being partially heated and depositing impurities into the bearing, the oil surface should be covered with no bearing, and there should be a wire mesh frame at 50-70 mm from the bottom of the box, and the bearing is placed on the wire mesh frame. In addition, a thermometer must be suspended in the fuel tank to strictly control the temperature of the oil. When the jacket is hot, take out the heated lead screw support bearings from the fuel tank, and immediately wipe off the oil traces and attachments attached to the bearing surface with a lint-free white cloth. Then use a cloth pad, flat the ends of both hands, align the shaft, and flatten. Push to the shoulder. If the sleeve does not go in, it may be too slow, the bearing has cooled, or the bearing is not equal. At this point, the copper sleeve can be used to hold the inner ring of the bearing and tapped gently with a hammer. After the bearing is set, remove the transformer oil from the bearing and add the grease of the motor name label. Generally it is between 1/3-2/3 of the lead screw support bearings chamber volume, not too much or too little. Too much will cause the bearing to heat up and leak, too little will accelerate the bearing wear and make a big noise.

2. Cold press mounting method of screw air compressor lead screw support bearings Cold press mounting is to press the bearing to the shaft smoothly at normal temperature with a press. When pressing, the center line of the press shaft should be coincident with the bearing shaft line to prevent the bearing from being skewed. Moreover, the pressure can only be applied to the inner ring of the bearing and not to the outer ring or the cage. Whether the screw air compressor lead screw support bearings is correctly installed is directly related to the service life of the lead screw support bearings, which is directly related to the safe and efficient operation of the screw air compressor.

ZYSL company specializes in lead screw support bearings for many years. All raw materials and accessories have been carefully selected to ensure a good user experience.

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