CN202056053U - Rotor assembly of 5.5-15 horsepower double-screw air compressor - Google Patents

Abstract

The utility model discloses a rotor assembly of a 5.5-15 horsepower double-screw air compressor, which relates to an air compression component of an air compressor. The rotor assembly is provided with a female rotor and a male rotor which are meshed with each other in a pair, wherein the female rotor is provided with six left-hand teeth, and the male rotor is provided with five right-hand teeth. Coordinate analytic values forming all tooth curve segments of the female rotor include a first point with X=-25.324095 and Y=-30.121071...and a two hundred and forty sixth point with X=13.294411 and Y=-37.031084. Coordinate analytic values forming all tooth curve segments of the male rotor include a first point with X=-0.000078 and Y=49.838603...and a two hundred and ninth point with X=47.399304 and Y=15.401050. Each tooth on the female rotor is provided with a tooth crest arc ab, a connecting arc bc, an arc envelope curve cd, an arc envelope curve de, an arc envelope curve ef and a pendulum point protecting arc fg, and each tooth on the male rotor is provided with a tooth root arc AB, an arc envelope curve BC, a transition arc CD, a tooth crest arc DE, a pendulum point protecting arc EF and an arc envelope curve FG corresponding to the arcs of each tooth on the female rotor. Profiles of the female rotor and the male rotor of the rotor assembly have no isolated point or straight line, so that the rotor assembly is easy to process.

Description

A kind of rotor combination of 5.5-15 horsepower double-screw air compressor

Technical field

The utility model relates to a kind of Air Compressor compression assembly.

Background technique

Double-screw air compressor utilizes female rotor, the male rotor of conjugation engagement running in the cavity to export pressurized air continuously.The characteristics of female rotor, male rotor end face molded lines have determined the performance and the efficient of compressor.The manufacturer of double-screw air compressor all is devoted to the molded lines research of yin, yang rotor flute profile now, it is ZL 200820056997.2 that for example Chinese utility model patent specification CN 201180654Y discloses the patent No., name is called the technological scheme of " double-screw air compressor screw rotor ", proposes this screw rotor and comprises a pair of intermeshing female rotor and male rotor; Wherein: female rotor is established 6 teeth, and its end face molded lines is made up of three circular arc lines, arc envelope line, straight line (junction of this arc envelope line and this straight line is an isolated point), a cycloid and two circular arc lines to the top circle of next tooth in turn from the top circle of a tooth; Male rotor is established 4 teeth, and its end face molded lines is made up of two arc envelope lines, two circular arc lines, two cycloids, a circular arc line (junction of a back cycloid and this circular arc line is an isolated point) and circular arc lines to the root circle of next tooth in turn from the root circle of a tooth.The document discloses the coordinate analytic value of forming each section of female rotor profile of tooth curved section and the coordinate analytic value of forming each section of male rotor profile of tooth curved section.The disclosed technological scheme of the document has can reduce fluid dynamic loss and reduction noise, and the leakage triangle area is little.Laterally reveal advantages such as little; But its female rotor and male rotor molded lines contain isolated point, even straight line, are difficult for processing.

The model utility content

The utility model aims to provide a kind of female rotor and the male rotor molded lines does not contain isolated point and straight line, easily the rotor of the 5.5-15 horsepower double-screw air compressor of processing makes up.

The technical solution of the utility model is: a kind of rotor combination of 5.5-15 horsepower double-screw air compressor, a pair of intermeshing female rotor and male rotor are arranged, and it is characterized in that: female rotor is established 6 left-handed teeth, and male rotor is established the tooth of 5 dextrorotation; The coordinate analytic value of forming each section of female rotor profile of tooth curved section is:

The coordinate analytic value of forming each section of male rotor profile of tooth curved section is:

Each tooth is provided with tooth top circular arc ab, connection circular arc bc, arc envelope line cd, arc envelope line de, arc envelope line ef, pendulum point protection circular arc fg on the described female rotor; On the described male rotor each tooth be provided with respectively with above-mentioned female rotor on the corresponding circular arc of each circular arc of each tooth: tooth root circular arc AB, arc envelope line BC, transition arc CD, tooth top circular arc DE, pendulum point protection circular arc EF, arc envelope line FG.

It is 5 that the male rotor number of teeth is adopted in the combination of the rotor of the utility model 5.5-15 horsepower double-screw air compressor, and the female rotor number of teeth is that 6 number of teeth combination can make the pressure reduction between element volume reduce, and the suction and discharge orifice area increases and helps improving compressor efficiency.Adopt the molded lines structure of the coordinate figure formation of above-mentioned yin, yang rotor, sealability between the yin, yang rotor tooth, between the volume, sealing strip by three broads stops pressurized gas to leak to low voltage terminal, and selected less leakage triangle for use, all the tooth curve is formed by circular arc and arc envelope line, and each tooth curve has been stopped isolated point, straight line, improve the rotor processibility, be convenient to adopt gear hobbing, mill, grind processing processing.The rotor combination of the utility model 5.5-15 horsepower double-screw air compressor, adopt above-mentioned molded lines to form, not a linear sealing in the above-mentioned molded lines engagement process but realize the flank of tooth multi-sealed to the flank of tooth in several zones fully, help and form the hydrodynamic lubrication oil film, reduce transverse leakage by Line of contact.Above-mentioned molded lines adopts less circular arc excessive, and leakage triangle is little, leaks few.Adopt the tooth top circular arc both to protect potted line to form point, be convenient to measure the male rotor external diameter again.Adopt the male rotor tooth top three-arc to connect, female rotor do not adopt circular arc take all of arc way and to the tooth top three-arc entirely with the arc envelope line engagement, the pump-absorb action of having avoided tooth curve moment engagement moment to throw off is of value to and forms oil film and reduce noise.It is streamlined that the moon, all tie points of male rotor molded lines all are that rounding off is, and resistance of air is little, reduced the fluid dynamic loss and reduced noise.All cycloids form point all the circular arc protection, therefore has better comprehensive performance.

Description of drawings

Fig. 1 is a rotor set unification embodiment's of the utility model 5.5-15 horsepower double-screw air compressor an end-face structure schematic representation.

Fig. 2 is the local enlarged diagram of T portion among Fig. 1.

Embodiment

A rotor set unification embodiment's of the utility model 5.5-15 horsepower double-screw air compressor end-face structure, as shown in Figure 1, this rotor set is combined into a pair of intermeshing female rotor and male rotor, the end-face structure of this rotor combination, as shown in Figure 1.Female rotor is established 6 left-handed teeth, and male rotor is established the tooth of 5 dextrorotation.On the female rotor on the helix angle numerical value of each tooth and the male rotor helix angle numerical value of each tooth be 46.1 °; On the female rotor on the length of toothed region and the male rotor length of toothed region be 160 millimeters; The tooth depth of male rotor is 19.2 millimeters, and the tooth depth of female rotor is 19.2 millimeters.The external diameter of female rotor is 78.7 millimeters, and the external diameter of male rotor is 99.7 millimeters.

The coordinate analytic value of forming female rotor 1 each section of profile of tooth curved section is:

The coordinate analytic value of forming male rotor 2 each section of profile of tooth curved sections is:

Adopt the molded lines structure of the coordinate figure formation of above-mentioned yin, yang rotor, as shown in Figure 2: each tooth is provided with tooth top circular arc ab, connection circular arc bc, arc envelope line cd, arc envelope line de, arc envelope line ef, pendulum point protection circular arc fg on the female rotor 1.On the male rotor 2 each tooth be provided with respectively with above-mentioned female rotor 1 on the corresponding circular arc of each circular arc of each tooth: tooth root circular arc AB, arc envelope line BC, transition arc CD, tooth top circular arc DE, pendulum point protection circular arc EF, arc envelope line FG.

Sealability between female rotor 1 and male rotor 2 between cog, the volume, sealing strip by three broads stops pressurized gas to leak to low voltage terminal, and selected less leakage triangle for use, and all the tooth curve is formed by circular arc and arc envelope line, and each tooth curve has been stopped isolated point and straight line.Not a linear sealing in the above-mentioned molded lines engagement process but realize the flank of tooth multi-sealed to the flank of tooth in several zones fully that adopt less circular arc excessive, leakage triangle is little, leaks few.Male rotor 2 tooth top three-arcs connect, and female rotor 1 tooth top three-arc meshes with arc envelope line entirely.It is streamlined that all tie points of the molded lines of female rotor 1 and male rotor 2 all are that rounding off is, and all cycloids form point all the circular arc protection.

The above only is the utility model preferred embodiment, does not limit the scope that the utility model is implemented with this, and the equivalence of doing according to the technical solution of the utility model and description changes and modification, all should belong to the scope that the utility model is contained.

Claims (1)

1. the rotor of 5.5-15 horsepower double-screw air compressor combination has a pair of intermeshing female rotor and male rotor, it is characterized in that; Female rotor is established 6 left-handed teeth, and male rotor is established the tooth of 5 dextrorotation;

The coordinate analytic value of forming each section of female rotor profile of tooth curved section is,

The coordinate analytic value of forming each section of male rotor profile of tooth curved section is,

Each tooth is provided with tooth top circular arc ab, connection circular arc bc, arc envelope line cd, arc envelope line de, arc envelope line ef, pendulum point protection circular arc fg on the described female rotor; On the described male rotor each tooth be provided with respectively with above-mentioned female rotor on the corresponding circular arc of each circular arc of each tooth: tooth root circular arc AB, arc envelope line BC, transition arc CD, tooth top circular arc DE, pendulum point protection circular arc EF, arc envelope line FG.

Images