The importance of periodic maintenance of the air compressor host
Views : 462
Author : Runningway
Update time : 2022-01-13 15:50:08
Air compressors are the lifeblood of many enterprises, and regular maintenance of air compressors is the premise to ensure their normal operation. The main engine is the heart part of the air compressor. It has been in high-speed operation for a long time and supports the operation of other components in the equipment. The main engine must be overhauled after a certain period of operation, because the main engine of the air compressor may run for a long time. The following faults and problems will occur:
1. The gap increases
A. The distance between the yin and yang rotors of the main engine increases. The direct consequence is that the leakage of the compressor (ie back leakage) increases during the compression process, and the volume of compressed air discharged from the machine becomes smaller. In terms of efficiency, the compression efficiency of the compressor is reduced.
B. The increase of the gap between the yin and yang rotors and the rear end cover and the bearing will mainly affect the sealing performance and compression efficiency of the compressor. It is caused by the clearance between the bearing and the main shaft.
2. Increased wear and tear
As we all know, as long as the machinery is running, there is wear and tear. Under normal circumstances, because of the lubrication of lubricating fluid, the wear will be reduced a lot, but long-term high-speed operation, the wear is slowly increasing. Take high-end bearings as an example: under almost impossible conditions (such as long-term idling, the lubricating fluid is clean enough, the cooling system is good enough, and the ambient temperature, humidity, etc.), it can only be guaranteed for a few years. As far as the compressor main engine is concerned, in addition to the bearing, there are other parts of wear. If proper precautions are not taken for minor wear, it is easy to lead to increased wear and damage and wear of other major components.
3. Part deformation
The main air compressor is the core compression component of the compressor. Its internal components are in a high temperature and high pressure environment for a long time, coupled with high-speed operation, there will inevitably be deformation of components over time. At the same time, the cause of deformation is also the use of environmental factors, and the air in the environment where the air compressor is generally used will have dust and impurities. It may cause the deformation of the yin and yang rotors, increase the gap, and seriously cause the host to be stuck.
4. Component damage
The vulnerable parts in the main engine part of the air compressor mainly include: various gaskets, sealing rings, shaft oil seals, etc., especially the shaft oil seals, which are exposed to high temperature, high pressure, and high-speed operation for a long time, and their service life ratio is greatly shortened. The direct consequence of its damage is to cause oil leakage of the compressor. If it is not found in time, the yin and yang rotors and bearings will be burned due to lack of lubrication.
5. Increased operating costs
The cost here refers to the maintenance cost and the electricity cost. Because the main engine of the air compressor has not been overhauled for a long time, the wear of the components increases, and some worn impurities remain in the main engine cavity, which will shorten the life of the lubricating fluid. The service life is greatly shortened, resulting in increased maintenance costs.
In terms of power costs, due to increased friction and reduced compression efficiency, power costs will inevitably increase. In addition, the decrease in air volume and the quality of compressed air caused by the main engine will also lead to an indirect increase in production costs.
Therefore, the possible consequences of not overhauling the main air compressor after long-term operation will not only cause serious damage to the compressor body, but also pose serious safety hazards. At the same time, it will bring serious direct and indirect economic losses to production. Therefore, preventive overhaul of the air compressor main engine after a certain period of operation is necessary and necessary.
6. Air compressor overhaul judgment and specific items
The general life of screw air compressors is about 30 years, but in actual production, due to the lack of long-term maintenance and repair, many screw compressors that have only been used for 10 years or even less time not only operate in poor condition, consume huge amounts of electricity, With constant failures and high operating costs, many users can only use it as a "unit to be scrapped".
At present, there are two main methods for determining the main engine overhaul in the air compressor industry:
1. Judgment according to the operating time of the unit: the air compressor unit must be overhauled after the cumulative operating time of the air compressor reaches 20,000 hours or after it has been put into operation for 4 years.
2. Judgment according to the actual operation of the unit: through the corresponding data detection and analysis of the unit's operating parameters such as noise, operating current, operating temperature, exhaust volume, main engine vibration, etc., to determine whether the main engine overhaul is required.
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