The main unit is the core component of the air compressor. Prolonged high-speed operation causes wear and tear on components and bearings, necessitating preventative overhauls after a certain period or several years of operation.
1. Clearance Adjustment
1) Increased radial clearance between the male and female rotors. The direct consequence is increased compressor leakage during compression, leading to a smaller volume of compressed air discharged and reduced compression efficiency.
2) Increased clearance between the male and female rotors and the rear end cover and bearings reduces the compressor's sealing performance and compression efficiency, while also shortening the rotor's lifespan.
3) Strong friction may exist between the screws and between the screws and the main unit housing, causing the motor to operate under overload conditions, seriously endangering motor safety. If the air compressor unit's electrical protection devices are insensitive or malfunctioning, it may also lead to motor burnout.
2. Wear Treatment. As is well known, prolonged high-speed operation increases wear. Proper maintenance and prevention are necessary for bearings, shaft seals, gearboxes, etc., otherwise, accelerated wear and component damage can easily occur.
3. Main Unit Cleaning. The air compressor's internal unit operates under high temperature and pressure for extended periods, coupled with high-speed operation. Dust and impurities from the ambient air accumulate with the lubricating oil, forming larger solids that can, in severe cases, cause the compressor to seize up.
4. Increased Costs. Maintenance costs and electricity expenses increase because the compressor unit has not undergone major overhauls for a long time, leading to severe wear and tear on components and a significantly shortened lubricating fluid lifespan. Furthermore, increased friction reduces compression efficiency and the quality of compressed air, inevitably increasing electricity and production costs.
In conclusion: Regular major overhauls of the compressor unit are a fundamental requirement for equipment maintenance. Using it beyond its service life poses serious safety hazards and will also cause significant direct and indirect economic losses to production.