Screw air compressor The reason why the main engine needs to be overhauled: With the running time of air compressor, the bearings of the main engine will inevitably wear out, resulting in axial 窜 The dynamic and radial displacement increases, which changes the gap between the screw and the screw, between the screw and the main housing and the front and rear end faces. These gap changes are normal and allowable over the life of the bearing, and the resulting air compressor aeration attenuation and main motor load increase are also normal and permissible. As the unit running time approaches the main engine overhaul period, the life of the main engine bearing gradually increases to the maximum allowable time limit. At this time, the axial and radial turbulence of the screw gradually progresses to the maximum design allowable value, which causes a large change in the gap between the screw and the screw, between the screw and the main body casing and the front and rear end faces. At this point, although the host is still running safely, it is time to consider the planned overhaul of the host. Because once the unit running time exceeds the overhaul period, the bearing wear and the host matching clearance reach the limit value allowed by the technical conditions of the host. At this time, the host is in an unsafe operating state, and the following serious consequences may occur at any time: The main engine running load increases, causing damage to the main motor and the electrical system. The strong friction between the main screw, between the screw and the front and rear end faces, between the screw and the main body casing can cause a sharp increase in the running load of the main engine, and severe wear and tear. The running load of the bearing is also large. As a result, the motor will be in an overloaded state, which will seriously endanger the safe operation of the motor. In the case of serious conditions, if the electrical protection device of the air compressor unit is insensitive or ineffective, it may also cause the motor to burn out. 2. Air compressor The displacement will be greatly attenuated. The increase of the matching clearance of the main engine will lead to a serious decrease in the efficiency of the main engine, that is, the displacement of the air compressor will have a large attenuation, which will have a certain impact on the normal production of the gas unit. Especially for those users who have a small amount of air compressor exhaust capacity, because the air compressor exhaust volume is attenuated, the compressed air pressure of the pipe network will be much lower when the gas consumption of the gas system is relatively stable. It may happen that the gas system equipment does not work normally or does not work at all, which may affect the normal production of the unit or cause temporary shutdown, causing losses to the enterprise. 3, the most serious consequence is the sudden emergence of the host "locked". In the event of such a situation, if the electrical protection system does not respond promptly or the protection fails, it may also cause serious damage to the main motor and electrical system. For the handling of the host "locked", on the one hand, the repair cost of the overhaul will be much more expensive than the normal overhaul, on the other hand, because the host components will be damaged, the overall performance of the host after repair will be more than that of the overhauled host. Worse. If the severity of the damage to the host has reached a repair value or cannot be repaired at all, it can only be abolished to replace the new host, and the direct loss is the biggest. Because the cost of the newly purchased mainframe is usually about one-third of the cost of purchasing the entire air compressor unit, which is much higher than the mainframe overhaul cost under normal circumstances, and the comprehensive technical performance and new host of the overhauled host under normal conditions. But it is very similar! In summary, it can be seen that the normal overhaul of the mainframe is not only the basic requirement for equipment maintenance, but also the basic requirements for the enterprise to control the normal equipment maintenance cost, avoid unnecessary capital loss and ensure the normal production of the enterprise! Therefore, it is not only necessary but also necessary to overhaul the air compressor mainframe on time and according to standards! The main engine of the screw air compressor needs to be overhauled: To be precise, the time for the main engine to be overhauled should be based on the service life of the bearing, but it is actually difficult to have accurate indicators to determine whether the service life of the bearing is about to expire. Or it has expired, so the internationally renowned air compressor manufacturer based on its nearly 100 years of practical experience to determine the standard is to overhaul the mainframe after compressor operation for 20,000 hours or 4 years. In addition to the above prevailing standards, based on experience, the host status can be judged more accurately from the following aspects: 1) the sound of the main engine during operation, especially the bearing has no abnormal sound;
2) motor running current , in particular, the difference between the no-load operating current and the standard value;
3) The vibration of each bearing of the head. Label [screw air compressor bearing] [screw air compressor bearing overhaul] recommended 3 cubic screw air compressor 6 cubic screw air compressor 10 cubic screw air compressor