Symmetrical series tri-rotor screw compressor

Abstract

The invention relates to a symmetrical series tri-rotor screw compressor. The screw compressor comprises a compressor engine body used for limiting three parallel rotors, an active rotor, a driven rotor, exhaust bearing seats separately arranged on the front and back ends of the engine body, an oil thrower, a rolling bearing and an exhaust end cap, wherein the three rotors are arranged symmetrically in series. The invention is characterized in that the screw compressor has a plurality of meshing areas, larger air displacement and excellent force characteristics, the radial force and torsion of a middle female rotor cancel each other and the axial forces of the three rotors are completely balanced in the work process. Therefore, the power performance of the compressor can be greatly improved, the mechanical friction loss can be reduced, the viscous friction loss in the fuel injection compressor can be lowered, and the operation efficiency and reliability of machines can be increased.

Description

technical field [0001] The invention relates to a screw compressor, in particular to a symmetrical serial three-rotor screw compressor. Background technique [0002] Screw compressors are now widely used in heating, ventilation and air conditioning engineering (HVAC). The most common twin-screw compressor consists of a pair of intermeshing male rotors and female rotors. Generally, the male rotor is used as the active rotor to connect with the prime mover to drive the female rotor. turn. The ball bearing on the rotor bears the axial force and assists in axial positioning. Likewise, cylindrical roller bearings at both ends of the rotor carry radial forces. The radial force is generated due to the difference in gas pressure on both sides of the rotor, and the axial force is generated due to the pressure difference between the suction and exhaust at both ends of the rotor, the meshing drive between the rotors and other factors. In general small and medium-sized screw compress...

AI Technical Summary

Problems solved by technology

In general small and medium-sized screw compressors, the load-carrying capacity of the bearing used increases with the increase of the bearing diameter, but it does not have the axial load as the rotor diameter increases as fast, and the bearing diameter is affected by the center distance between the two rotors. Therefore, when the diameter of the rotor is large, there is not enough space between the two rotors to install the required bearing. Therefore, it is necessary to design a new type of screw compressor to improve the force on the rotor and reduce the load on the bearing.

Images