Rotor profile of double-toothed rotor compressor, double-toothed rotor and compressor

Abstract

The invention discloses a double-tooth rotor compressor rotor profile and the double-tooth rotor and the compressor. The basic meshing curve of the female rotor profile includes a cycloid ab, a tooth bottom arc bc, a line segment cd, and a pin tooth circle connected in sequence. Arc de and addendum arc ef; the basic meshing curve of male rotor profile includes cycloid AB, addendum arc BC, straight line conjugate curve segment CD, pin-tooth arc DE and tooth bottom arc EF connected in sequence. The rotor profile of the double-tooth rotor compressor of the present invention adopts pin-tooth arcs, straight lines and straight-line conjugate curves as the connecting line between the tooth top arc and the tooth bottom arc. Design; both the tooth tops of the female and male rotors have a tooth top arc, so the line contact seal between the tooth tops and the cylinder greatly reduces the internal leakage of the compressor. There is a longer tooth bottom arc EF on the profile line of the male rotor, so that the actual exhaust flow area of ​​the compressor is larger during the exhaust process.

Description

technical field [0001] The invention belongs to the technical field of compressors and vacuum pumps, and in particular relates to a double-tooth rotor compressor rotor profile, a double-tooth rotor and a compressor. Background technique [0002] The double-toothed rotor compressor is a rotary volumetric compressor, which has a very good application prospect in the field of oil-free air compressors, especially in high-speed, small-volume and oil-free occasions such as vehicles and food. Great development potential. The double-toothed rotor compressor consists of a pair of double-toothed rotors that are always meshing, a "∞" shaped cylinder, end plates on both sides of the axial direction, and a pair of synchronous counter-rotating gears. The double-toothed rotor, "∞" shaped cylinder and the end plate form the working chamber. The rotor is always meshed during the rotation around the axis, and the volume of the working chamber is periodically reduced. When the pressure of the...

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Problems solved by technology

[0004] (1) More curve pairs with more meshing segments are used to achieve continuous fitting, which brings about problems such as many profile parameters and narrow range of profile parameters;

[0005] (2) The use of conjugate curves with fewer meshing segments to achieve continuous meshing results in complex or even impossible solutions for certain conjugate curves;

[0006] (3) During the compressor exhaust process, the actual exhaust flow area is affected by the rotor coverage and is small, resulting in excessive compressor exhaust resistance and a sharp drop in thermal efficiency;

[0007] (4) There is inevitably point contact between the tooth top of the double-toothed rotor compressor and the inner surface of the cylinder, and the internal leakage is serious

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