CN102022334B - Rotor molded line of screw vacuum pump - Google Patents

Rotor molded line of screw vacuum pump Download PDF

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Publication number
CN102022334B
CN102022334B CN 201010606422 CN201010606422A CN102022334B CN 102022334 B CN102022334 B CN 102022334B CN 201010606422 CN201010606422 CN 201010606422 CN 201010606422 A CN201010606422 A CN 201010606422A CN 102022334 B CN102022334 B CN 102022334B
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rotor
section
arc
point
vacuum pump
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CN102022334A (en
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张玉新
刘琦
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Rugao Packing Food Machinery Co ltd
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SHANGHAI GELI FLUID MACHINERY CO Ltd
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Abstract

The invention relates to a rotor molded line of a screw vacuum pump. Eight-section curves are used to respectively form end surface molded lines of a first rotor and a second rotor, and the molded line series of the two rotors of the screw vacuum pump are formed by the same center distance A and the rotors with different numbers. The rotor molded line of the screw vacuum pump in the invention is applied to the two rotors, the end surface molded lines of the first and second rotors are conjugate rotor end surface molded lines which are completely identified, expect the left rotation and right rotation are respectively adopted so that meshed relation is formed. The screw vacuum pump applying the rotor molded line of the screw vacuum pump can be widely applied to the fields such as electronics, semiconductors, chemical industry, food industry, aerospace and the like.

Description

A kind of screw vacuum pump molded lines of rotor
Technical field
The present invention relates to screw vacuum pump, relate in particular to a kind of screw rotor molded lines that is applicable to the twin-screw vacuum pump.
Background technique
The quality of screw vacuum pump end face molded lines is with directly having influence on the performance of screw vacuum pump, as sealing, efficient, area utilization factor etc.Popular molded lines has German Ritchie music type line, Japan's big rolling molded lines, Taiwan Chinese bell line etc. in the market, and they have characteristics separately, but also exists separately independently problem.
Summary of the invention
The present invention is on the basis of drawing domestic and international existing screw vacuum pump molded lines advantage, develop a kind of screw vacuum pump molded lines of rotor, it is a kind of novel conjugation rotor end-face molded lines, also claim the self-conjugate molded lines, two rotors are identical, molded lines is made up of circular arc, helix and envelope thereof, has solved above-mentioned prior art and has taken what one needs and independent, the unilateral problem of generation.
Technical solution of the present invention is as follows:
A kind of screw vacuum pump molded lines of rotor adopts eight sections curves to form the first rotor and the second rotor end-face molded lines respectively, constitutes the molded lines series of two rotors of screw vacuum pump with the rotor of identical centre distance A and different numbers;
The molded lines of described the first rotor is composed as follows:
a 1b 1Section: by helix on second rotor or circular curve b 2c 2The envelope that generates;
b 1c 1Section: employing waits variable angle spiral or circular arc, waits the formula of variable angle spiral:
Figure 423760DEST_PATH_720727DEST_PATH_IMAGE002
Wherein: cornerite
Figure 178089DEST_PATH_RE-69753DEST_PATH_IMAGE002
B on the curve 1The laying angle of point
Figure 915101DEST_PATH_RE-15712DEST_PATH_IMAGE003
C on the curve 1The laying angle of point
c 1d 1Section: on the first rotor, with O 1Centered by the point, R 10Tooth top arc for radius;
d 1e 1Section: on the first rotor, be cut in tooth top arc c 1d 1The circular arc of section;
e 1f 1Section: on the first rotor, cross two pitch circle intersection point f 1, cut d 1e 1Section is in e 1One section circular arc of point;
f 1g 1Section: by circular arc e on second rotor 2f 2The arc envelope line that generates;
g 1h 1Section: by circular arc d on second rotor 2e 2The arc envelope line that generates;
h 1a 1Section: on the first rotor, with O 1Centered by the point, R 1Tooth root arc for radius;
The molded lines of second rotor is composed as follows:
a 2b 2Section: by helix curve b on the first rotor 1c 1The envelope that generates;
b 2c 2Section: variable angle spirals such as employing, formula and parameter value and b 1c 1Section is identical, and just the position differs two quadrants;
c 2d 2Section: on second rotor, with O 2Centered by the point, R 20Be the radius tooth top arc that draws;
d 2e 2Section: on second rotor, be cut in tooth top arc c 2d 2The circular arc of section;
e 2f 2Section: on second rotor, cross two pitch circle intersection point f 2, cut d 2e 2Section is in e 2One section circular arc of point;
f 2g 2Section: by circular arc e on the first rotor 1f 1The arc envelope line that generates;
g 2h 2Section: by circular arc d on the first rotor 1e 1The arc envelope line that generates;
h 2a 2Section: on second rotor, with O 2Centered by the point, R 2Tooth root arc for radius.
The end face molded lines of described the first rotor is by a 1b 1, b 1c 1, c 1d 1, d 1e 1, e 1f 1, f 1g 1, g 1h 1, h 1a 1Eight sections curves are formed.
The end face molded lines of described second rotor is by a 2b 2, b 2c 2, c 2d 2, d 2e 2, e 2f 2, f 2g 2, g 2h 2, h 2a 2Eight sections curves are formed.
The face type line of described the first rotor and second rotor forms conjugate relation.
A kind of screw vacuum pump molded lines of rotor of the present invention is applied to two rotors, and the first rotor and second rotor are conjugation rotor end-face molded lines, and be identical, just adopts left-handed and dextrorotation respectively, can form meshing relation.
The centre distance of two rotor end-face molded lines is A, and the first rotor number of teeth is z 1, the second rotor number of teeth is z 2, select z- 1, z 2The principle of institute's foundation is: to being used for the screw vacuum pump of low speed low flow rate condition, z 1/ z 2Desirable 1/1 single head molded lines; To being used for the screw vacuum pump of the big flow operating mode of middle and high speed, z 1/ z 2Bull molded lines such as desirable 2/2,3/3.Then, can determine the radius R of the first rotor and the second rotor pitch circle 1j=R 2j, the principle of institute's foundation is: R 1j=R 2j=A/2.
Use the screw vacuum pump of screw vacuum pump molded lines of rotor of the present invention, can be widely used in fields such as electronics, semiconductor, chemical industry, food, space flight.
Description of drawings
Fig. 1 is the structural representation of a kind of screw vacuum pump molded lines of rotor of the present invention.
Embodiment
Elaborate below in conjunction with the structure of drawings and Examples to screw vacuum pump rotor end-face molded lines of the present invention.
Referring to Fig. 1, the invention provides a kind of screw vacuum pump molded lines of rotor, adopt eight sections curves to form the first rotor 1 and second rotor, 2 end face molded lines respectively.Constitute the molded lines series of two rotors of screw vacuum pump with the rotor of identical centre distance A and different numbers.
The molded lines of the first rotor and second rotor is composed as follows:
R 1Be the root radius of the first rotor, R 10It is the Outside radius of the first rotor.
R 2Be the root radius of second rotor, R 20It is the Outside radius of second rotor.
R 1=R 2, R 10=R 20, pitch circle R 1j=R 2j=(R 1+ R 10)/2.
b 1Put on the first rotor pitch circle b 2O'clock on the second rotor pitch circle.
The molded lines of the first rotor is composed as follows:
a 1b 1Section: by helix on second rotor or circular curve b 2c 2The envelope that generates.
b 1c 1Section: employing waits variable angle spiral or circular arc, waits the formula of variable angle spiral:
Figure 55281DEST_PATH_49684DEST_PATH_IMAGE002
Wherein: cornerite
Figure 879129DEST_PATH_IMAGE002
B on the curve 1The laying angle of point
C on the curve 1The laying angle of point
Figure 527465DEST_PATH_IMAGE004
c 1d 1Section: on the first rotor, with O 1Centered by the point, R 10Tooth top arc for radius.
d 1e 1Section: on the first rotor, be cut in tooth top arc c 1d 1The circular arc of section.
e 1f 1Section: on the first rotor, cross two pitch circle intersection point f 1, cut d 1e 1Section is in e 1One section circular arc of point.
f 1g 1Section: by circular arc e on second rotor 2f 2The arc envelope line that generates.
g 1h 1Section: by circular arc d on second rotor 2e 2The arc envelope line that generates.
h 1a 1Section: on the first rotor, with O 1Centered by the point, R 1Tooth root arc for radius.
The molded lines of second rotor is composed as follows:
a 2b 2Section: by helix curve b on the first rotor 1c 1The envelope that generates.
b 2c 2Section: variable angle spirals such as employing, formula and parameter value and b 1c 1Section is identical, and just the position differs two quadrant (see figure 1)s.
c 2d 2Section: on second rotor, with O 2Centered by the point, R 20Be the radius tooth top arc that draws.
d 2e 2Section: on second rotor, be cut in tooth top arc c 2d 2The circular arc of section.
e 2f 2Section: on second rotor, cross two pitch circle intersection point f 2, cut d 2e 2Section is in e 2One section circular arc of point.
f 2g 2Section: by circular arc e on the first rotor 1f 1The arc envelope line that generates.
g 2h 2Section: by circular arc d on the first rotor 1e 1The arc envelope line that generates.
h 2a 2Section: on second rotor, with O 2Centered by the point, R 2Tooth root arc for radius.
As shown in FIG., the end face molded lines of the first rotor is by a 1b 1, b 1c 1, c 1d 1, d 1e 1, e 1f 1, f 1g 1, g 1h 1, h 1a 1Eight sections curves are formed, and the end face molded lines of second rotor is by a 2b 2, b 2c 2, c 2d 2, d 2e 2, e 2f 2, f 2g 2, g 2h 2, h 2a 2Eight sections curves are formed, and the face type line of the first rotor and second rotor forms conjugate relation.
The main feature of a kind of screw vacuum pump molded lines of rotor of the present invention is:
1, on the rotor end-face molded lines of the present invention, helix b 1c 1Employing waits variable angle spiral or circular arc, waits the formula of variable angle spiral:
2, the helix envelope a on the rotor end-face molded lines of the present invention 1b 1, be by helix or circular curve b 2c 2Generate; Helix or arc envelope line a 2b 2, be by helix or circular curve b 1c 1Generate.
3, the end face molded lines of the first rotor is by a 1b 1, b 1c 1, c 1d 1, d 1e 1, e 1f 1, f 1g 1, g 1h 1, h 1a 1Form Deng eight sections curves, and with eight sections corresponding curve a of the end face molded lines of second rotor 2b 2, b 2c 2, c 2d 2, d 2e 2, e 2f 2, f 2g 2, g 2h 2, h 2a 2Form conjugate relation.
Screw vacuum pump molded lines of rotor of the present invention concrete building process in actual applications is as follows:
According to Fig. 1, the molded lines of the first rotor is by a 1b 1, b 1c 1, c 1d 1, d 1e 1, e 1f 1, f 1g 1, g 1h 1, h 1a 1Eight sections compositions, the line segment of second rotor is by a 2b 2, b 2c 2, c 2d 2, d 2e 2, e 2f 2, f 2g 2, g 2h 2, h 2a 2Eight sections compositions.
(1) makes up generation curve b at the first rotor 1c 1
b 1c 1Section: according to formula
Figure 572030DEST_PATH_238406DEST_PATH_IMAGE002
Wherein: cornerite
Figure 394293DEST_PATH_IMAGE002
B on the curve 1The laying angle of point
Figure 678644DEST_PATH_IMAGE003
C on the curve 1The laying angle of point
Figure 560012DEST_PATH_IMAGE004
With pitch circle and center line intersection point b 1Be starting point, R 1jBeing initiated with radius, by above-mentioned formula, is variable with θ, calculates each point, and smooth connection, can get b 1c 1Variable angle spirals such as section.
(2) the first rotor pitch circle is done pure rolling at the second rotor pitch circle, the spin velocity of the first rotor pitch circle ratio of tarnsition velocity together is 1:1, is cemented in helix or circular arc b on the first rotor 1c 1Track, can form helix or the arc envelope line a of second rotor 2b 2
(3) make up generation curve b at second rotor 2c 2
Adopt the same formula of above-mentioned the first rotor.
With pitch circle and center line intersection point b 2Be starting point, R 2jBeing initiated with radius, by above-mentioned formula, is variable with θ, calculates each point, and smooth connection, can get b 2c 2Variable angle spirals such as section.
(4) the second rotor pitch circle is done pure rolling at the first rotor pitch circle, the spin velocity of the second rotor pitch circle ratio of tarnsition velocity together is 1:1, is cemented in second epitrochanterian variable angle spiral or the circular arc b of waiting 2c 2Track, can form helix or the arc envelope line a of the first rotor 1b 1
(5) the first rotor pitch circle is done pure rolling at the second rotor pitch circle, the spin velocity of the second rotor pitch circle ratio of tarnsition velocity together is 1:1, is cemented in the circular arc d on the first rotor 1e 1, e 1f 1Track, can form the arc envelope line g of second rotor 2h 2, f 2g 2The second rotor pitch circle is done pure rolling at the first rotor pitch circle, be cemented in the second epitrochanterian circular arc d 2e 2, e 2f 2Track, can form the arc envelope line g of the first rotor 1h 1, f 1g 1
So far, the first rotor, the second rotor end-face molded lines have just been built fully.
In sum, a kind of screw vacuum pump molded lines of rotor of the present invention is applied to two rotors, and the first rotor and second rotor are conjugation rotor end-face molded lines, and be identical, just adopts left-handed and dextrorotation respectively, can form meshing relation.Use the screw vacuum pump of screw vacuum pump molded lines of rotor of the present invention, can be widely used in fields such as electronics, semiconductor, chemical industry, food, space flight.
Certainly, those skilled in the art in the art will be appreciated that, above-described embodiment only is that the present invention is described, and be not as limitation of the invention, as long as in connotation scope of the present invention, all will drop in the scope of claim of the present invention the variation of above-described embodiment, modification etc.

Claims (3)

1. a screw vacuum pump rotor is characterized in that, adopts eight sections curves to form the first rotor and the second rotor end-face molded lines respectively, constitutes the molded lines series of two rotors of screw vacuum pump with the rotor of identical centre distance A and different numbers;
The face type line of described the first rotor and second rotor forms conjugate relation;
Wherein: the first rotor number of teeth is z 1, the second rotor number of teeth is z 2R 1Be the root radius of the first rotor, R 10It is the Outside radius of the first rotor; R 2Be the root radius of second rotor, R 20It is the Outside radius of second rotor;
The molded lines of described the first rotor is composed as follows:
a 1b 1Section: by helix on second rotor or circular curve b 2c 2The envelope that generates;
b 1c 1Section: employing waits variable angle spiral or circular arc, waits the formula of variable angle spiral:
Wherein: cornerite
Figure 682629DEST_PATH_IMAGE002
B on the curve 1The laying angle of point
Figure 2010106064225100001DEST_PATH_IMAGE003
C on the curve 1The laying angle of point
Figure 222938DEST_PATH_IMAGE004
c 1d 1Section: on the first rotor, with O 1Centered by the point, R 10Tooth top arc for radius;
d 1e 1Section: on the first rotor, be cut in tooth top arc c 1d 1The circular arc of section;
e 1f 1Section: on the first rotor, cross two pitch circle intersection point f 1, cut d 1e 1Section is in e 1One section circular arc of point;
f 1g 1Section: by circular arc e on second rotor 2f 2The arc envelope line that generates;
g 1h 1Section: by circular arc d on second rotor 2e 2The arc envelope line that generates;
h 1a 1Section: on the first rotor, with O 1Centered by the point, R 1Tooth root arc for radius;
The molded lines of second rotor is composed as follows:
a 2b 2Section: by helix curve b on the first rotor 1c 1The envelope that generates;
b 2c 2Section: variable angle spirals such as employing, formula and parameter value and b 1c 1Section is identical, and just the position differs two quadrants;
c 2d 2Section: on second rotor, with O 2Centered by the point, R 20Be the radius tooth top arc that draws;
d 2e 2Section: on second rotor, be cut in tooth top arc c 2d 2The circular arc of section;
e 2f 2Section: on second rotor, cross two pitch circle intersection point f 2, cut d 2e 2Section is in e 2One section circular arc of point;
f 2g 2Section: by circular arc e on the first rotor 1f 1The arc envelope line that generates;
g 2h 2Section: by circular arc d on the first rotor 1e 1The arc envelope line that generates;
h 2a 2Section: on second rotor, with O 2Centered by the point, R 2Tooth root arc for radius.
2. screw vacuum pump rotor according to claim 1 is characterized in that, the end face molded lines of described the first rotor is by a 1b 1, b 1c 1, c 1d 1, d 1e 1, e 1f 1, f 1g 1, g 1h 1, h 1a 1Eight sections curves are formed.
3. screw vacuum pump rotor according to claim 1 is characterized in that, the end face molded lines of described second rotor is by a 2b 2, b 2c 2, c 2d 2, d 2e 2, e 2f 2, f 2g 2, g 2h 2, h 2a 2Eight sections curves are formed.
CN 201010606422 2010-12-24 2010-12-24 Rotor molded line of screw vacuum pump Expired - Fee Related CN102022334B (en)

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Families Citing this family (5)

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Publication number Priority date Publication date Assignee Title
CN102828954B (en) * 2012-09-14 2015-06-17 上海齐耀螺杆机械有限公司 Novel rotor profile of twin-screw compressor
CN103032333B (en) * 2013-01-11 2015-04-29 西安交通大学 Double-screw vacuum pump rotor molded line
CN105484999B (en) * 2015-12-29 2018-02-16 天津华科螺杆泵技术有限公司 The single thread screw rod and its twin-screw of a kind of sealing
CN108050069B (en) * 2018-01-22 2023-07-25 中国石油大学(华东) Low-leakage full-smooth screw rotor
CN109555687B (en) * 2019-01-07 2024-03-19 鑫磊压缩机股份有限公司 Single screw meshing mechanism and forming method of single screw cylindrical surface enveloping molded line

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CN1676935A (en) * 2004-03-30 2005-10-05 李汗强 Rotor tooth profile for helical-lobe compressor
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