CN102022334A - Rotor molded line of screw vacuum pump - Google Patents

Rotor molded line of screw vacuum pump Download PDF

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Publication number
CN102022334A
CN102022334A CN 201010606422 CN201010606422A CN102022334A CN 102022334 A CN102022334 A CN 102022334A CN 201010606422 CN201010606422 CN 201010606422 CN 201010606422 A CN201010606422 A CN 201010606422A CN 102022334 A CN102022334 A CN 102022334A
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rotor
section
arc
vacuum pump
point
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CN102022334B (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 NAIPU FLUID MACHINERY TECHNOLOGY 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 in the market molded lines has German Ritchie music type line, Japan's big rolling molded lines, Taiwan Chinese bell line etc., and they all 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 rotor molded line of screw vacuum pump adopts respectively eight sections curves to form the first rotor and the second rotor end-face molded lines, consists of the molded lines series of two rotors of screw vacuum pump with the rotor of identical centre-to-centre spacing 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 computing formula of variable angle spiral:
Figure 187248DEST_PATH_IMAGE001
Wherein: cornerite
Figure 69753DEST_PATH_IMAGE002
B on the curve 1The laying angle of point
Figure 15712DEST_PATH_IMAGE003
C on the curve 1The laying angle of point
Figure 551736DEST_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: the variable angle spirals such as employing, computing 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 profile 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, g 1a 1Eight sections curves form.
Described bitrochanteric profile is by a 2b 2, b 2c 2, c 2d 2, d 2e 2, e 2f 2, f 2g 2, g 2h 2, g 2a 2Eight sections curves form.
The face type line of the described the first rotor and second rotor forms conjugate relation.
A kind of rotor molded line of screw vacuum pump 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 respectively left-handed and dextrorotation, 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.Consist of the molded lines series of two rotors of screw vacuum pump with the rotor of identical centre-to-centre spacing 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 computing formula of variable angle spiral:
Wherein: cornerite
Figure 879129DEST_PATH_IMAGE002
B on the curve 1The laying angle of point
Figure 945174DEST_PATH_IMAGE003
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: the variable angle spirals such as employing, computing 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 profile 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, g 1a 1Eight sections curves form, and bitrochanteric profile is by a 2b 2, b 2c 2, c 2d 2, d 2e 2, e 2f 2, f 2g 2, g 2h 2, g 2a 2Eight sections curves form, and the first rotor and bitrochanteric profile form 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 computing formula of variable angle spiral:
Figure 46171DEST_PATH_IMAGE001
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 profile 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, g 1a 1Form Deng eight sections curves, and with eight sections corresponding curve a of bitrochanteric profile 2b 2, b 2c 2, c 2d 2, d 2e 2, e 2f 2, f 2g 2, g 2h 2, g 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, g 1a 1Eight sections compositions, bitrochanteric line segment is by a 2b 2, b 2c 2, c 2d 2, d 2e 2, e 2f 2, f 2g 2, g 2h 2, g 2a 2Eight sections compositions.
(1) makes up generation curve b at the first rotor 1c 1
b 1c 1Section: according to computing formula
Figure 739321DEST_PATH_IMAGE001
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 1jBe initiated with radius, by above-mentioned computing formula, take θ as variable, calculate each point, and be smoothly connected, can get b 1c 1The variable 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 together ratio of tarnsition velocity is 1:1, is cemented in helix or circular arc b on the first rotor 1c 1Track, can form bitrochanteric helix or arc envelope line a 2b 2
(3) make up generation curve b at second rotor 2c 2
Adopt the same computing formula of above-mentioned the first rotor.
With pitch circle and center line intersection point b 2Be starting point, R 2jBe initiated with radius, by above-mentioned computing formula, take θ as variable, calculate each point, and be smoothly connected, can get b 2c 2The variable 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 together ratio of tarnsition velocity 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 together ratio of tarnsition velocity is 1:1, is cemented in the circular arc d on the first rotor 1e 1, e 1f 1Track, can form bitrochanteric arc envelope line g 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 rotor molded line of screw vacuum pump 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 respectively left-handed and dextrorotation, 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 present technique field will be appreciated that, the foregoing description only is to be used for illustrating the present invention, 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 the foregoing description, modification etc.

Claims (4)

1. a rotor molded line of screw vacuum pump is characterized in that, adopts respectively eight sections curves to form the first rotor and the second rotor end-face molded lines, consists of the molded lines series of two rotors of screw vacuum pump with the rotor of identical centre-to-centre spacing 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 computing formula of variable angle spiral:
Figure 899199DEST_PATH_IMAGE001
Wherein: cornerite
Figure 549623DEST_PATH_IMAGE002
B on the curve 1The laying angle of point
Figure 332771DEST_PATH_IMAGE003
C on the curve 1The laying angle of point
Figure 232594DEST_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: the variable angle spirals such as employing, computing 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. rotor molded line of screw vacuum pump according to claim 1 is characterized in that, the profile 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, g 1a 1Eight sections curves form.
3. rotor molded line of screw vacuum pump according to claim 1 is characterized in that, described bitrochanteric profile is by a 2b 2, b 2c 2, c 2d 2, d 2e 2, e 2f 2, f 2g 2, g 2h 2, g 2a 2Eight sections curves form.
4. screw vacuum pump molded lines of rotor according to claim 1 is characterized in that, the face type line of the described the first rotor and second rotor forms conjugate relation.
CN 201010606422 2010-12-24 2010-12-24 Rotor molded line of screw vacuum pump Expired - Fee Related CN102022334B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102828954A (en) * 2012-09-14 2012-12-19 上海齐耀螺杆机械有限公司 Novel rotor profile of twin-screw compressor
CN103032333A (en) * 2013-01-11 2013-04-10 西安交通大学 Double-screw vacuum pump rotor molded line
CN105484999A (en) * 2015-12-29 2016-04-13 天津华科螺杆泵技术有限公司 Sealed single-head spiral screw and double screws thereof
CN108050069A (en) * 2018-01-22 2018-05-18 中国石油大学(华东) A kind of complete smooth screw rotor of low leakage
CN109555687A (en) * 2019-01-07 2019-04-02 鑫磊压缩机股份有限公司 A kind of forming method of single screw rod engaging mechanism and single screw rod cylindrical surface envelope molded line

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102828954A (en) * 2012-09-14 2012-12-19 上海齐耀螺杆机械有限公司 Novel rotor profile of twin-screw compressor
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
CN103032333A (en) * 2013-01-11 2013-04-10 西安交通大学 Double-screw vacuum pump rotor molded line
CN103032333B (en) * 2013-01-11 2015-04-29 西安交通大学 Double-screw vacuum pump rotor molded line
CN105484999A (en) * 2015-12-29 2016-04-13 天津华科螺杆泵技术有限公司 Sealed single-head spiral screw and double screws thereof
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
CN108050069A (en) * 2018-01-22 2018-05-18 中国石油大学(华东) A kind of complete smooth screw rotor of low leakage
CN109555687A (en) * 2019-01-07 2019-04-02 鑫磊压缩机股份有限公司 A kind of forming method of single screw rod engaging mechanism and single screw rod cylindrical surface envelope molded line
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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