What is the reason for the oil leakage of the rotor shaft seal of the screw air compressor?
Views : 708
Author : Runningway
Update time : 2021-11-22 16:06:00
The shaft seal of the screw head of the air compressor has high requirements for temperature resistance, wear resistance and tightness under pressure due to its operating conditions. There are several possibilities for oil leakage during user use:
1. In some models, there is an O-ring seal between the oil seal sleeve and the shaft. When assembling, the pulley does not compress the shaft sleeve, which will cause the sleeve to rotate, and the O-ring will be worn and ruptured, causing oil leakage.
2. Oil builds up carbon. As the normal working temperature of the screw compressor is relatively high, when the quality of the screw oil used is not good or the oil is not changed according to the specified time, the wrong oil is used (the screw special oil is not used), or different types of oil are mixed, it may be high for a long time. Carbon deposits are generated under temperature, causing the lips to wear out too quickly, resulting in poor sealing and oil leakage.
3. Spray paint on the shaft sleeve. During assembly or maintenance in the production plant, oil leaks due to poor lip sealing due to spray paint on the shaft seal sleeve.
4. Excessive vibration. Due to the poor dynamic balance of the input shaft end of the machine head, the belt pulley or the coupling, vibration caused by excessive wear of the shaft seal and oil leakage.
5. The working environment of the machine head is too dirty, sludge impurities, etc. come into contact with the lip of the shaft seal, causing the shaft seal to wear quickly.
6. Poor oil return caused by oil circulation in the air compressor.
7. Improper maintenance. Due to the hidden damage to the lip of the shaft seal caused by the previous disassembly of the motor head for maintenance, the user needs special tooling when reinstalling the oil seal and reinstalling it according to the process requirements (this is very important). Of course, if you replace the oil seal by yourself, it is recommended to use the original parts and replace the shaft seal sleeve at the same time, otherwise it is difficult to meet the maintenance standard through the pressure test.
8. Bearing wear. Due to poor oil quality or impurities, it is also easy to cause early bearing wear, and the radial deviation of the output shaft causes the oil seal lip to wear and leak. The reason why the screw head can operate for a long time with high reliability is because the life of the bearing is basically equal to the life of the head.
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