CN102352847A - Oil-free helical-lobe compressor rotor - Google Patents

Oil-free helical-lobe compressor rotor Download PDF

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Publication number
CN102352847A
CN102352847A CN2011103549036A CN201110354903A CN102352847A CN 102352847 A CN102352847 A CN 102352847A CN 2011103549036 A CN2011103549036 A CN 2011103549036A CN 201110354903 A CN201110354903 A CN 201110354903A CN 102352847 A CN102352847 A CN 102352847A
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China
Prior art keywords
rotor
circular arc
section
arc
molded lines
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CN2011103549036A
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Chinese (zh)
Inventor
张驰
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SHANGHAI GELI FLUID MACHINERY CO Ltd
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SHANGHAI GELI FLUID MACHINERY CO Ltd
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Priority to CN2011103549036A priority Critical patent/CN102352847A/en
Publication of CN102352847A publication Critical patent/CN102352847A/en
Pending legal-status Critical Current

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Abstract

The invention relates to an oil-free helical-lobe compressor rotor molded line.. A bilateral asymmetric molded line is adopted; a negative rotor end face molded line and a positive rotor end face molded line are respectively composed of seven segments of molded lines, and the negative molded line series and positive rotors molded line series are composed of negative and positive rotors with the same center distance A and different sizes. In the invention, a bilateral asymmetric isodiametric rotor molded line is adopted for the novel oil-free helical-lobe compressor rotor molded line, thus the rotor has the advantages of short contact wires and small leakage triangle, and the rotor mold line is a streamline form and the like. By applying a screw compressor and a screw vacuum pump of the oil-free helical-lobe compressor rotor molded line provided by the invention, the oil-free helical-lobe compressor rotor molded line can be broadly used in the fields such as air compression, refrigeration, air conditioning, process gas compression, pneumatic transmission, vacuum application, and occupies the most market share under the middle-low pressure and vacuum working conditions.

Description

The oil free screw compressor rotor
Technical field
The present invention relates to double-screw compressor, relate in particular to a kind of novel rotor molded lines that is applicable to oil free screw compressor.
Background technique
The quality of screw compressor end face molded lines is with directly having influence on the performance of helical-lobe compressor, like sealing, efficient etc.Popular in the market molded lines has GHH molded lines, SRM---D ~ N molded lines etc., and they all have characteristics separately.
Double-screw compressor has developed very soon since last century, the forties emerged, and has been widely used in many fields.The renewal of screw rotor molded lines and development are the major impetus that promotes the double-screw compressor development.In the patent documentation of various countries, the screw rotor molded lines emerges in an endless stream, and purpose all is in order to raise the efficiency, to improve performance.The design of screw rotor molded lines, should consider following these factors usually:
1, flank of tooth contact line length is short as far as possible, to reduce the transverse leakage loss;
2, the leakage triangle area is as far as possible little, to reduce vertical leakage loss;
3, area utilization factor is big as far as possible, to improve air displacement.
In the patent documentation at home and abroad,, improve performance, carried out various researchs in order to raise the efficiency, for example:
In the Chinese patent document 200410204539.3,200710171655.5,200810204539.3, for the b on the female rotor 2c 2Curve all adopts circular arc pin tooth curve (center is at the circular arc of node P), and its shortcoming is: the engagement of yin, yang rotor is not steady with disengagement, and the instantaneous variation of stream pressure is arranged, thereby produces noise and vibration.
In the existing screw rotor molded lines, the diameter of yin, yang rotor all is inequality, and the male rotor diameter is greater than the female rotor diameter, and the shortcoming of existence is:
1, the diameter of yin, yang rotor is different, and the diameter of female rotor is little, poor rigidity, and then bearing capacity a little less than;
2, the diameter of yin, yang rotor is different, if adopt identical air cavity inner wall sealing gap, internal leakage is bigger, and volumetric efficiency is low.
Summary of the invention
The present invention is on the basis of drawing domestic and international existing helical-lobe compressor molded lines advantage; Develop the identical novel rotor molded lines of a kind of yin, yang root diameter; Oil free screw compressor molded lines of rotor of the present invention is applicable to the rotor of oil free screw compressor; It is a kind of novel molded lines of rotor of helical lobe compressor, has solved above-mentioned existing in prior technology problem.
Technical solution of the present invention is following:
A kind of oil free screw compressor molded lines of rotor; Adopt bilateral asymmetric molded lines; Form yin, yang rotor end-face molded lines by seven segment type lines respectively, constitute the molded lines series of the yin, yang rotor of helical-lobe compressor with the yin, yang rotor of identical centre distance A and different size;
The molded lines of said male rotor is formed as follows:
a 1b 1Section: by circular arc a on the female rotor 2b 2Arc envelope line form;
b 1c 1Section: by pin tooth circular arc b on the female rotor 2c 2Arc envelope line form;
c 1d 1Section: on male rotor, with O 3Point is center, R 4For radius is drawn pin tooth circular arc c 1d 1, O 3Point is to be the center with node P, R 3Be the master end circular arc of radius and the intersection point of pitch circle i, wherein R 3=(0 ~ 0.1) R 1i
d 1e 1Section: on male rotor, be the tooth top circular arc of male rotor, its arc length l=1 ~ 10mm;
e 1f 1Section: on male rotor, for connecting the transition arc of tooth top circular arc;
f 1g 1Section: by circular arc f on the female rotor 2g 2Arc envelope line form;
g 1h 1Section: by the tooth top circular arc g on the female rotor 2h 2Arc envelope line form;
The molded lines of said female rotor is formed as follows:
a 2b 2Section: on female rotor, the center of circle is in pitch circle j, and radius is R 8Circular arc, R wherein 8=3 ~ 15mm;
b 2c 2Section: on female rotor, the center of circle is node Q on pitch circle j, with radius R 5The pin tooth circular arc of making;
c 2d 2Section: by the pin tooth circular arc c on the male rotor 1d 1Arc envelope line form;
d 2e 2Section: by tooth top circular arc d on the male rotor 1e 1Arc envelope line form;
e 2f 2Section: by circular arc e on the male rotor 1f 1Arc envelope line form;
f 2g 2Section: on female rotor, the center of circle is in pitch circle j or on the pitch circle, and radius is R 6Circular arc, R wherein 6=0.5 ~ 5mm;
g 2h 2Section: on female rotor, be the tooth top circular arc of female rotor, its arc length l=2 ~ 10mm.
The diameter of said yin, yang rotor is identical.
On the said male rotor end face molded lines, the pin tooth circular arc c in master end 1d 1Center of circle O 3For male rotor pitch circle i and the center of circle are R at node P, radius 3The master end intersection point of circular arc.
The a of said yin, yang rotor 2, b 2, c 2, d 2, e 2, f 2, g 2, h 2, a 1, b 1, c 1, d 1, e 1, f 1, g 1,h 1Point is public point of contact.
A kind of oil free screw compressor rotor of the present invention adopts bilateral asymmetric isodiametric molded lines of rotor, makes rotor Line of contact is short, leakage triangle is little except having, molded lines of rotor is the advantage such as streamlined, the more important thing is that the present invention also has following characteristics:
1, tooth top separately, the root diameter of yin, yang rotor are identical.
2, on the male rotor end face molded lines of the present invention, the pin tooth circular arc c in master end 1d 1Center of circle O 3For male rotor pitch circle i and the center of circle are R at node P, radius 3The master end intersection point of circular arc.
3, the master end circular arc a on the female rotor end face molded lines of the present invention 2b 2With passive side circular arc f 2g 2The center be on pitch circle j or in the pitch circle.
Use helical-lobe compressor, the screw vacuum pump of novel oil free screw compressor molded lines of rotor of the present invention; Can be widely used in fields such as air compression, refrigeration, air-conditioning, process gas compression, strength conveying, vacuum application, under mesolow, vaccum working condition, occupy most market shares.
Description of drawings
Fig. 1 is the structural representation of a kind of oil free screw compressor molded lines of rotor of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment the structure of oil free screw compressor molded lines of rotor of the present invention is elaborated.
Referring to Fig. 1, the present invention provides a kind of oil free screw compressor molded lines of rotor, and the following part molded lines of center line is the master end molded lines among the figure, and the above part molded lines of center line is passive side molded lines.
The present invention adopts bilateral asymmetric molded lines, forms yin, yang rotor end-face molded lines by seven segment type lines respectively, constitutes the molded lines series of the yin, yang rotor of helical-lobe compressor with the yin, yang rotor of identical centre distance A and different size.
Wherein, the molded lines of male rotor is formed as follows:
a 1b 1Section: by circular arc a on the female rotor 2b 2Arc envelope line form.
b 1c 1Section: by pin tooth circular arc b on the female rotor 2c 2Arc envelope line form.
c 1d 1Section: on male rotor, with O 3Point is center, R 4For radius is drawn pin tooth circular arc c 1d 1, O 3Point is to be the center with node P, R 3Be the master end circular arc of radius and the intersection point of pitch circle i, wherein R 3=(0 ~ 0.1) R 1i
d 1e 1Section: on male rotor, be the tooth top circular arc of male rotor, its arc length l=1 ~ 10mm.
e 1f 1Section: on male rotor, for connecting the transition arc of tooth top circular arc.
f 1g 1Section: by circular arc f on the female rotor 2g 2Arc envelope line form.
g 1h 1Section: by the tooth top circular arc g on the female rotor 2h 2Arc envelope line form.
The molded lines of female rotor is formed as follows:
a 2b 2Section: on female rotor, the center of circle is in pitch circle j, and radius is R 8Circular arc, R wherein 8=3 ~ 15mm.
b 2c 2Section: on female rotor, the center of circle is node Q on pitch circle j, with radius R 5The pin tooth circular arc of making.
c 2d 2Section: by the pin tooth circular arc c on the male rotor 1d 1Arc envelope line form.
d 2e 2Section: by tooth top circular arc d on the male rotor 1e 1Arc envelope line form.
e 2f 2Section: by circular arc e on the male rotor 1f 1Arc envelope line form.
f 2g 2Section: on female rotor, the center of circle is in pitch circle j or on the pitch circle, and radius is R 6Circular arc, R wherein 6=0.5 ~ 5mm.
g 2h 2Section: on female rotor, be the tooth top circular arc of female rotor, its arc length l=2 ~ 10mm.
In addition, a of yin, yang rotor 2, b 2, c 2, d 2, e 2, f 2, g 2, h 2, a 1, b 1, c 1, d 1, e 1, f 1, g 1,h 1Point is public point of contact.
The concrete building process of oil free screw compressor molded lines of rotor of the present invention in practical application is following:
According to Fig. 1, the line segment of female rotor is by a 2b 2, b 2c 2, c 2d 2, d 2e 2, e 2f 2, f 2g 2, g 2h 2Seven sections compositions, the molded lines of male rotor is by a 1b 1, b 1c 1, c 1d 1, d 1e 1, e 1f 1, f 1g 1, g 1h 1Seven sections compositions.
At first, confirm a 1, g 1, a 2, g 2The position of point, the method for confirming is: according to ∠ a 1O 1g 1=360/Z 1, ∠ a 2O 2g 2=360/Z 2(number of teeth of yin, yang rotor is Z 2, Z 1), and the mid point of the tooth top circular arc of male rotor arranged O 1O 2On the connecting line, can confirm a 1, g 1, a 2, g 2The position of point.
Then, specifically make up each section curve:
(1) on male rotor, makes up generation curve c 1d 1, d 1e 1, e 1f 1
c 1d 1Section: the point of contact P with yin, yang rotor pitch circle is the center of circle earlier, with R 3Draw a circular arc for radius, meet at last 1 O of male rotor master end pitch circle i 3, then with O 3Be the center, with R 4Be radius, draw c 1d 1Section pin tooth circular arc.
d 1e 1Section: with O 1Be the center of circle, with R 1=R 2For radius is drawn one section tooth top circular arc, and make tooth top circular arc d 1e 1Section is with line segment O 1O 2Symmetry, its arc length l=1 ~ 10mm.
e 1f 1Section: at o 1f 1On the line segment, get a bit,, make arc section e as the center of circle 1f 1
(2) the male rotor pitch circle is done pure rolling on the female rotor pitch circle, the spin velocity of the male rotor pitch circle ratio of tarnsition velocity together is Z 2/ Z 1, be cemented in the circular arc c on the male rotor 1d 1, d 1e 1, e 1f 1Track, can form the arc envelope line c of female rotor 2d 2, d 2e 2, e 2f 2
(3) on female rotor, make up generation curve a 2b 2, b 2c 2, f 2g 2, g 2h 2
b 2c 2Section: on the female rotor pitch circle, get 1 Q, as the center of circle, with R 5Be radius, draw b 2c 2The section circular arc.
a 2b 2Section: make b 2c 2The public circle of contact a of the tooth top circular arc of section circular arc and female rotor 2b 2, wherein, R 8=3 ~ 15mm, the center of circle is in pitch circle j.
f 2g 2Section: make f 2g 2The radius of the tooth top circular arc of section arc envelope line and female rotor is R 6The public circle of contact, can draw f 2g 2Section circular arc, wherein R 6=0.5 ~ 5mm, the center of circle is in pitch circle j or on the pitch circle.
g 2h 2Section: get on the female rotor, with O 2Be the center of circle, radius R 2=R 1, draw tooth top circular arc g 2h 2
(4) the female rotor pitch circle is done pure rolling on the male rotor pitch circle, the spin velocity of the female rotor pitch circle ratio of tarnsition velocity together is Z 1/ Z 2, be cemented in the circular arc a on the female rotor 2b 2, b 2c 2, f 2g 2, g 2h 2Track, can form the arc envelope line a of male rotor 1b 1, b 1c 1, f 1g 1, g 1h 1
(5) with a of male rotor 1b 1, b 1c 1, c 1d 1, d 1e 1, e 1f 1, f 1g 1, g 1h 1The curve combination is with tooth number Z 1, O along the center of circle 1, circumference uniform distribution can obtain the end face molded lines of male rotor.A with female rotor 2b 2, b 2c 2, c 2d 2, d 2e 2, e 2f 2, f 2g 2, g 2h 2The curve combination is with tooth number Z 2, O along the center of circle 2, circumference uniform distribution can obtain the end face molded lines of female rotor.
So far, the negative and positive rotor end-face has just been built fully.
In sum, a kind of novel oil free screw compressor rotor of the present invention adopts bilateral asymmetric isodiametric molded lines of rotor, makes that rotor has that Line of contact is short, leakage triangle is little, molded lines of rotor is advantage such as streamlined.Use helical-lobe compressor, the screw vacuum pump of oil free screw compressor molded lines of rotor of the present invention; Can be widely used in fields such as air compression, refrigeration, air-conditioning, process gas compression, strength conveying, vacuum application, under mesolow, vaccum working condition, occupy most market shares.
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 with opposing qualification of the present 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. oil free screw compressor molded lines of rotor; It is characterized in that; Adopt bilateral asymmetric molded lines, form yin, yang rotor end-face molded lines by seven segment type lines respectively, constitute the molded lines series of the yin, yang rotor of helical-lobe compressor with the yin, yang rotor of identical centre distance A and different size;
The molded lines of said male rotor is formed as follows:
a 1b 1Section: by circular arc a on the female rotor 2b 2Arc envelope line form;
b 1c 1Section: by pin tooth circular arc b on the female rotor 2c 2Arc envelope line form;
c 1d 1Section: on male rotor, with O 3Point is center, R 4For radius is drawn pin tooth circular arc c 1d 1, O 3Point is to be the center with node P, R 3Be the master end circular arc of radius and the intersection point of pitch circle i, wherein R 3=(0 ~ 0.1) R 1i
d 1e 1Section: on male rotor, be the tooth top circular arc of male rotor, its arc length l=1 ~ 10mm;
e 1f 1Section: on male rotor, for connecting the transition arc of tooth top circular arc;
f 1g 1Section: by circular arc f on the female rotor 2g 2Arc envelope line form;
g 1h 1Section: by the tooth top circular arc g on the female rotor 2h 2Arc envelope line form;
The molded lines of said female rotor is formed as follows:
a 2b 2Section: on female rotor, the center of circle is in pitch circle j, and radius is R 8Circular arc, R wherein 8=3 ~ 15mm;
b 2c 2Section: on female rotor, the center of circle is node Q on pitch circle j, with radius R 5The pin tooth circular arc of making;
c 2d 2Section: by the pin tooth circular arc c on the male rotor 1d 1Arc envelope line form;
d 2e 2Section: by tooth top circular arc d on the male rotor 1e 1Arc envelope line form;
e 2f 2Section: by circular arc e on the male rotor 1f 1Arc envelope line form;
f 2g 2Section: on female rotor, the center of circle is in pitch circle j or on the pitch circle, and radius is R 6Circular arc, R wherein 6=0.5 ~ 5mm;
g 2h 2Section: on female rotor, be the tooth top circular arc of female rotor, its arc length l=2 ~ 10mm.
2. oil free screw compressor molded lines of rotor according to claim 1 is characterized in that the diameter of said yin, yang rotor is identical.
3. oil free screw compressor molded lines of rotor according to claim 1 is characterized in that, on the said male rotor end face molded lines, and the pin tooth circular arc c in master end 1d 1Center of circle O 3For male rotor pitch circle i and the center of circle are R at node P, radius 3The master end intersection point of circular arc.
4. oil free screw compressor molded lines of rotor according to claim 1 is characterized in that, a of said yin, yang rotor 2, b 2, c 2, d 2, e 2, f 2, g 2, h 2, a 1, b 1, c 1, d 1, e 1, f 1, g 1,h 1Point is public point of contact.
CN2011103549036A 2011-11-10 2011-11-10 Oil-free helical-lobe compressor rotor Pending CN102352847A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2011103549036A CN102352847A (en) 2011-11-10 2011-11-10 Oil-free helical-lobe compressor rotor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2011103549036A CN102352847A (en) 2011-11-10 2011-11-10 Oil-free helical-lobe compressor rotor

Publications (1)

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CN102352847A true CN102352847A (en) 2012-02-15

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102606477A (en) * 2012-03-29 2012-07-25 无锡五洋赛德压缩机有限公司 Rotor profile of screw compressor
CN103244428A (en) * 2013-05-31 2013-08-14 上海齐耀螺杆机械有限公司 High-efficiency rotor molded line of compressor with double screws

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102606477A (en) * 2012-03-29 2012-07-25 无锡五洋赛德压缩机有限公司 Rotor profile of screw compressor
CN102606477B (en) * 2012-03-29 2014-12-03 无锡五洋赛德压缩机有限公司 Rotor profile of screw compressor
CN103244428A (en) * 2013-05-31 2013-08-14 上海齐耀螺杆机械有限公司 High-efficiency rotor molded line of compressor with double screws
CN103244428B (en) * 2013-05-31 2015-07-15 上海齐耀螺杆机械有限公司 High-efficiency rotor molded line of compressor with double screws

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Application publication date: 20120215