Some companies using screw air compressors have encountered the problem of the head getting stuck. Here is a brief introduction and analysis.
First, check if there is insufficient lubricating oil in the screw air compressor. Insufficient lubricating oil may be caused by the following reasons:
1) Long-term shutdown (including transportation), insufficient oil in the machine head, resulting in instantaneous oil shortage and jamming. Therefore, for equipment that has been shut down for a long time, sufficient oil should be added to the machine head before restarting;
2) Insufficient oil supply, including untimely replacement or addition of lubricating oil, or oil circuit blockage and leakage, resulting in oil shortage and jamming of the machine head;
Secondly, it causes the rotor to explode due to direct contact, including:
a. The bearing is aging and severely worn. The specific detection of the degree of bearing wear can be done by moving the needle or ball on the lower side of the bearing when the bearing is not removed. If it can be easily moved, it means that it needs to be replaced; as the air compressor runs for a long time, the main engine bearing will inevitably wear, resulting in increased axial movement and radial movement of the screw. This change will change the gap between the screws, the screw and the main engine housing, and the front and rear end faces. This clearance change is normal and allowed within the life of the bearing, and the resulting attenuation of the air compressor's gas output and the increase in the transmission motor load are also normal and allowed. However, when the bearing wears and the main engine clearance exceeds the allowable limit, serious consequences may occur. In particular, foreign objects fall into the air filter paper and get stuck. A piece of iron filings 1 mm thick also gets stuck. When encountering such a problem, first of all, there will be friction between the internal screw and the front and rear end faces of the main engine, and between the screw and the main engine housing, and the motor load will increase sharply. The most serious consequence is that the screw is locked or even the main engine is scrapped. If the motor protection is not sensitive or fails, it may cause the motor to burn out. Secondly, the large attenuation of the air compressor's gas output may affect the normal production of the gas user.
b. Too many impurities, including impurities in the oil, carbon deposits, and coking. Therefore, it is critical to select and replace lubricants; such accidents are more likely to occur when using inferior lubricants or overdue use.