Four action of the screw compressor injected screw compressors injection four main problems to solve cooling, lubrication, sealing, noise reduction. (1) Cooling effect: was micro-injected into the oil droplets and mixing with the compressed gas, extremely rapid heat transfer surface to absorb the heat of compression gas, cooling the pressurized medium, greatly reduce the exhaust gas temperature; (2) lubrication: In a dry type screw compressor, the two rotors are not in contact with each other, relying on precision synchronization gears maintain a gap. In the injection compressor, since there are a lot of oil exists and the female rotor absorbs only the total consumption of the compression work of a small part, which can dispense with the synchronization gear, the male rotor directly drives the female rotor. Further, since the oil injected into the bearing with lubricating oil used in exactly the same, so there is no need to use a complex set of sealing means spaced from the gas compressor with the lubricating oil price, which makes the distance between the bearings supporting the rotor can be more small, significantly improves the rigidity of the rotor, the deformation is reduced; (3) the sealing effect: In the screw compressor multiple internal leak paths, some of these leak paths are narrow gaps, the presence of oil greatly strengthen the sealing effect , so that by their leakage amount has been reduced; (4) the noise reduction: The oil is injected into the viscous fluid, and the sound waves of the acoustic energy absorption and damping effect, noise can be reduced after the fuel injection is generally 10 to 20 decibels. What factors will affect actual screw compressor displacement screw compressor displacement theory depends on the volume of the teeth, teeth and speed. Teeth is determined by the volume of the rotor geometry. For the compressor, the actual displacement is less than the theoretical displacement Possible reasons are: 1) leakage. Between the rotor and between the rotor and the housing is not in contact during operation, maintaining a certain clearance, so will produce gas leakage. Gas pressure increases after leaking through the gap to the suction pipe and being aspirated gnawing slots allow displacement decreases. In order to reduce the amount of leakage in the addendum of the driven rotor seals do have teeth, roots initiative open rotor seal groove, end processing also has a ring or strip seal teeth. If these seals wear lines, will allow an increase of leakage, displacement reduction; 2) breathing state. Screw compressors are positive displacement compressors, suction volume unchanged. When the intake air temperature rises, the resistance is too large, or the suction line leaving the suction pressure decreases, the density of the gas is reduced, with a corresponding reduction in the actual exhaust gas will; 3) cooling effect. In the compression process gas temperature increases compressor, the temperature of the rotor and the casing corresponding increase Cottle compressor, so during inspiration, the gas will be subject to the heating of the rotor and the casing is expanded, thus correspondingly will reduce the amount of suction. Rotor screw air compressor and some use a compressor oil cooling Qin Wei, chassis cooling water, one of its aims is to reduce its temperature. When the cooling effect is not good, the temperature is increased, the displacement will be reduced; 4) speed. Displacement proportional to the speed of the screw compressor, and the speed tends to vary with the grid voltage and frequency. When the voltage is lowered (for asynchronous motor) or the frequency decreases, the speed will drop, making gas reduction. Compressor prices, air compressor, air compressor Qin Wei, compressor provided by professional manufacturer Compressor Co., Ltd., Xianyang Qin Wei. Xianyang Qin Wei Compressor Co. (www.xykyj.cn/) strong, credible, Xianyang in Shaanxi compression, separation equipment industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Qin Wei Air and you hand into the brilliant, for a better future!