What is the relationship between compressor speed and air compressor service life

What is the relationship between compressor speed and air compressor service life

The speed of the screw air compressor has an inevitable relationship with the maintenance cycle of the main compressor. The higher the speed of the head, the service life of the bearing will also be shortened. Excessively high compressor speed not only affects the service life of the bearing, but also prone to lock-up of the screw head. Due to the high machining accuracy of the twin-screw rotor, coupled with the existence of factors such as the guarantee of the rotor material and the processing time, the finished rotor must be controlled It is generally difficult to guarantee 100% accuracy.

Therefore, compressor manufacturers usually grade the quality of compressor rotors, sell top or first-class products to important users and their own users, and sell second and third-class products to authorized OEM vendors. Anyway, air compressor The sale of a machine does not identify its own brand, and this situation does exist.

Cost is the key factor. There are frequent high-speed rotations of small heads. Some manufacturers or sellers who do not have the production conditions in the market use air compressors for OEM sales. Due to the increased cost of commissioned production, manufacturers have to be required to adopt The main engine of the small compressor increases the speed of the head (commonly, the main engine speed of the micro-screw air compressor reaches 9000-12000 r/min), and enters the market to compete for low-price sales of air compressors; similarly, some have the conditions for air compressor production The manufacturer, because there is no product concept, no market sales service office, it is difficult to establish its own marketing network, and simply specialize in the production of OEM air compressors for sellers. Anyway, it is not its own brand, as long as it can be sold at a low price.

　　 The following is a reference for the speed of the small and medium-sized belt drive air compressor power adapter air compressor head: (varies according to the working pressure of the air compressor 7-13bar)

　　1. Miniature screw air compressor (belt drive) series:

　　 4KW screw air compressor: the main engine speed of the compressor is 2000-2700r/min,

　　5.5KW screw air compressor: the main engine speed of the compressor is 2700-3500r/min,

　　7.5KW screw air compressor: the main engine speed of the compressor is 3800-4500r/min,

　　11KW screw air compressor: the main engine speed of the compressor is 4800-5700r/min,

　　2. Small screw air compressor (belt drive) series:

　　15KW-18KW screw air compressor: the main engine speed of the compressor is 2000-2700r/min,

　　 22KW screw air compressor: the main engine speed of the compressor is 2900-3400r/min,

　　30KW-37KW screw air compressor: the compressor main engine speed is 3500-4300r/min,

　　45KW screw air compressor: the main engine speed of the compressor is 4400-5200r/min,

　　3, small and medium screw air compressor (belt drive) series:

　　55KW screw air compressor: the main engine speed of the compressor is 2900-4300r/min,

　　75KW screw air compressor: the main engine speed of the compressor is 4280-5200r/min,

　　90KW screw air compressor: the main engine speed of the compressor is 2680-2800r/min,

　　 Belt drive series screw air compressors below 90KW, if the compressor main engine speed is higher than the above parameter value, it will greatly shorten the head maintenance cycle, increase the maintenance cost, and reduce the use value of the equipment.