1. Oil leakage fault analysis
In the daily operation of the screw air compressor, oil leakage of the screw air compressor often occurs, and there is lubricating oil spilling on the surface.
Reasons for oil leakage of air compressor:
1. The oil seal is off or the oil seal is defective and leaks.
2. The main shaft is loose and the oil seal leaks.
3. Leakage of the joint surface, loosening of the oil inlet and return pipe joints.
4. The belt is installed too tightly and the main bearing bush is worn out.
5. Casting or processing defects can also cause oil leakage in the air compressor.
Judgment and troubleshooting methods of screw air compressor oil leakage failure:
1. If the air compressor leaks oil, pay attention to the oil seal position, check whether the oil seal is cracked, whether the inner lip is cracked or flanged. If there is one of the above conditions, it should be replaced; check whether the joint surface of the oil seal and the main shaft is scratched or defective. If there are scratches or defects, it should be replaced. Check whether the oil return is unblocked. If the oil return is not smooth, the crankcase pressure is too high and the oil seal leaks or falls off. It is necessary to ensure that the minimum pipe diameter of the oil return sight glass on the return pipe screw air compressor, and does not twist, bend, and return the oil. Smooth. Check the matching size of the oil seal and box body, and replace those that do not meet the standards.
2. Move the main shaft forcefully to check whether the neck gap is too large. If the gap is too large, replace the bearing bush and oil seal at the same time.
3. Check the sealing conditions of the gaskets of each joint, repair or replace the gaskets; check and tighten the bolts of the oil inlet and return joints and the box body threads.
4. Check the oil leakage of the air compressor and readjust the tightness of the belt. It is advisable to press down 10 mm with your thumb.
5. If the air compressor is leaking oil, it is necessary to check the casting or processing defects of the box body, and repair or replace the defective parts.
2. Overheating failure analysis
In the daily operation of the air compressor, the air compressor will overheat due to the long-term overload operation of the air compressor. Air filter element air compressor overheating failure phenomenon:
1. The exhaust temperature of the air compressor is too high.
2. The moving parts are hot.
Causes of air compressor overheating failure:
1. The pressure relief valve or unloading valve does not work, causing the air compressor to overheat and malfunction.
2. The air brake system leaks seriously, causing the air compressor to overheat and malfunction.
3. Insufficient oil supply at the operating parts and cylinder pulling.