As a kind of rotary refrigeration compressor, the screw refrigeration compressor has the characteristics of piston type and power type (speed type).
1. compared with the reciprocating piston refrigeration compressor, the screw refrigeration compressor has the advantages of high speed, light weight, small size, small footprint and low exhaust pulsation.
2. the screw type refrigeration compressor has no reciprocating mass inertia force, good dynamic balance performance, stable operation, small vibration of the base, and the base can be made smaller.
3. screw refrigeration compressor has the advantages of simple structure, fewer parts, valve, piston ring like no wearing parts, its main friction parts such as rotor, bearings, strength and wear degree are high, and good lubricating conditions, thus the machining amount is less, low material consumption, long operation cycle, the use of comparison *, simple maintenance, is conducive to the realization of automatic control.
4. compared with the speed of compressor, screw compressor has the characteristics of forced gas, effect of exhaust volume is almost not affected by the exhaust pressure, exhaust in the small amount of surge phenomenon does not occur in a wide range of working conditions, can still maintain a high efficiency.
5. using the slide valve adjustment, can realize the stepless adjustment of energy.
6. screw compressor is not sensitive to the liquid inlet, can be used in oil cooling, therefore under the same pressure ratio, exhaust temperature of piston is much lower, so the single stage pressure ratio.
7. there is no clearance volume, thus high volume efficiency.