CN102052322A - Twin-screw compressor rotor profile - Google Patents
Twin-screw compressor rotor profile Download PDFInfo
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- CN102052322A CN102052322A CN 201010602725 CN201010602725A CN102052322A CN 102052322 A CN102052322 A CN 102052322A CN 201010602725 CN201010602725 CN 201010602725 CN 201010602725 A CN201010602725 A CN 201010602725A CN 102052322 A CN102052322 A CN 102052322A
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- 241000668709 Dipterocarpus costatus Species 0.000 claims description 13
- 239000000203 mixtures Substances 0.000 claims description 7
- 230000002146 bilateral Effects 0.000 claims description 5
- 230000001105 regulatory Effects 0.000 claims description 2
- 238000000034 methods Methods 0.000 description 5
- 238000007906 compression Methods 0.000 description 4
- 239000003570 air Substances 0.000 description 3
- 239000007789 gases Substances 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 238000009827 uniform distribution Methods 0.000 description 2
- 281000064475 Hitachi companies 0.000 description 1
- 238000006073 displacement reactions Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering processes Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006011 modification reactions Methods 0.000 description 1
Abstract
Description
Technical field
The present invention relates to helical-lobe compressor, relate in particular to a kind of new molded lines of screw rotor that is applicable to double-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, as sealing, efficient, area utilization factor etc.Popular in the market molded lines has GHH molded lines, Hitachi's molded lines, SRM 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 as far as possible short, laterally misses loss to reduce;
2, the gas leakage triangle area is as far as possible little, to reduce the Longitudinal Leakage loss;
3, area utilization factor is big as far as possible, to improve air displacement;
4, the molded lines curve is excessively slick and sly, and no cusp or sharp change to reduce the flow perturbation loss, improve manufacturability simultaneously;
5, the negative moment on the female rotor is as far as possible little, to improve power performance, improves adiabatic efficiency.
In the patent documentation at home and abroad,, improve performance, carried out various researchs in order to raise the efficiency, for example:
In order to reduce the leakage triangle, Chinese patent literature 03102207.3 disclosed the G place of the passive side top circle of female rotor connect a FG curve and in meet quadratic curve r=(ε K)/(1-ε cos θ), though the leakage triangle area is effectively controlled, but specifically implement, some difficulty, and curve connection and rough, break is arranged.
In order to construct molded lines, Chinese patent literature such as 200410204539.3,200710171655.5,200810204539.3 in, 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 order to improve the sealing of rotor and cavity inner wall, Chinese patent literature 200710171655.5 has proposed at the tooth top of male rotor an elliptic curve to be set, its shortcoming is: on the end face molded lines, rotor contacts with cavity inner wall remains a point, rather than a line, sealing effect is not the best.Though Chinese patent literature 200410204539.3 has proposed to add the preceding paragraph circular arc on the male rotor tooth top, does not have specific embodiment, thereby is difficult to carry out.
Summary of the invention
The present invention is on the basis of drawing domestic and international existing helical-lobe compressor molded lines advantage, develops a kind of double-screw compressor molded lines of rotor, and 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 as follows:
A kind of double-screw compressor molded lines of rotor adopts bilateral asymmetric molded lines, forms yin, yang rotor end-face molded lines by six segment type lines, 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;
The molded lines of described female rotor is composed as follows:
a 1b 1Section: circular arc a 1b 1Before cut the male rotor root circle in a 1Point, after cut elliptic arc b 1c 1In b 1Point, its radius R 5=(0.05 ~ 0.1) * R 1, the O of center outside pitch circle 4The point on;
b 1c 1Section: on male rotor, oval heart O 3Point is at O 1O 2Connecting line on, the oval curve composition 1/4 or more, its longitudinal axis L=(R 1-R 1j)+(0.1 ~ 0.2) R 1j, minor axis S=(0.85 ~ 0.95) L;
c 1d 1Section: on male rotor, with O 1Centered by the point, R 1Be the radius tooth top arc that draws, angle α 1=1 ~ 3 °;
d 1e 1Section: on female rotor, with O 5Centered by the point, R 6Be the radius d that draws 1e 1The circular arc of section, wherein O 1O 5d 1On a ray, R 6=(0.05 ~ 0.2) R 1j
e 1f 1Section: by straight line e on the male rotor 2f 2Envelope form;
f 1g 1The section: by the center of circle on the male rotor at O 6, radius is R 3Circular arc f 2g 2Envelope forms;
The molded lines of described female rotor is composed as follows:
a 2b 2Section: by on male rotor, the O of center outside pitch circle 4On the point, radius is R 5Circular arc a 1b 1The section envelope forms;
b 2c 2Section: by on male rotor, the center is at oval heart O 3Point is at O 1O 2Connecting line on, major axis is L, minor axis is the oval b of S 1c 1The envelope of section forms;
c 2d 2Section: by on male rotor, the center is at O 1On, angle is α 1Tooth top arc c 1d 1Envelope form;
d 2e 2Section: by on male rotor, the center of circle is O 5Point, radius are R 6Circular arc line segment d 1e 1Envelope form;
e 2f 2Section: on female rotor, straight line e 2f 2The section public affairs are cut in d 2e 2Section arc envelope line and circular arc f 2e 2Between, to be smoothly connected two curves;
f 2g 2The section: by the center of circle on the female rotor at O 6, radius is R 3Circular arc form R 3=(0.03 ~ 0.05) R 2j, the center of circle is in nodel line.
The a of described yin, yang rotor 2, b 2, c 2, e 2, f 2, g 2, a 1, b 1,c 1, e 1, f 1, g 1Point is public point of contact.
On the described female rotor profile, the circular arc f of the certain radius at passive side outside circle place 2g 2With arc envelope line d 2e 2Between use straight line e 2f 2Be smoothly connected as common tangent.
Elliptic arc b on the described male rotor profile 1c 1, be different from conventional circular arc pin tooth curve or its envelope, by adjusting the Length Ratio of ellipse long and short shaft, elliptic arc b 1c 1The engagement that can make male rotor and female rotor with throw off closer to steadily.
Tooth top circular arc c on the described male rotor profile 1d 1Angle be capable of regulating, and itself and elliptic arc b 1c 1With circular arc d 1e 1Connection be tangent and for smooth.
A kind of double-screw compressor molded lines of rotor of the present invention adopts bilateral asymmetric molded lines, make rotor except have Line of contact short, reveal that triangle is little, area of passage big, molded lines of rotor is streamlined, reduce the advantage such as aerodynamical resistance, the more important thing is that the present invention also has following characteristics:
1, on the female rotor profile of the present invention, the circular arc f of the certain radius at passive side outside circle place 2g 2With arc envelope line d 2e 2Between use straight line e 2f 2Be smoothly connected as common tangent.
2, the elliptic arc b on the male rotor profile of the present invention 1c 1, be different from conventional circular arc pin tooth curve or its envelope, by the Length Ratio of suitable adjustment ellipse long and short shaft, elliptic arc b 1c 1The engagement that can make male rotor and female rotor with throw off closer to steadily, thereby noise reduction and vibration.
3, the tooth top circular arc c on the male rotor profile of the present invention 1d 1Angle can adjust within the specific limits and itself and elliptic arc b 1c 1With circular arc d 1e 1Connection be tangent, thereby particularly smooth.
The centre distance of negative and positive rotor end-face molded lines is A, and the male rotor number of teeth is z 1, the female rotor number of teeth is z 2, select z- 1, z 2The principle of institute's foundation is: to being used for the compressor of low pressure and mass flow operating mode, z 1/ z 2Bidentate difference molded lines such as desirable 3/5,4/6; To being used for the compressor of mesohigh low flow rate condition, z 1/ z 2Desirable 4/5,5/6,6/7,7/8 molded lines such as difference such as monodentate such as grade.Then, can determine the radius R of male rotor pitch circle 1jRadius R with the female rotor pitch circle 2j, the principle of institute's foundation is: A=R 1j+ R 2j, R 1j/ R 2j=Z 1/ Z 2
Use the helical-lobe compressor of double-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, under the mesolow operating mode, occupy most market shares.
Description of drawings
Fig. 1 is the structural representation of a kind of double-screw compressor molded lines of rotor of the present invention.
Embodiment
Elaborate below in conjunction with the structure of drawings and Examples to double-screw compressor rotor end-face molded lines of the present invention.
Referring to Fig. 1, the invention provides a kind of twin-screw compressor rotor profile, the following part molded lines of center line is the master end molded lines among the figure, 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 six 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.Wherein, the molded lines of female rotor is composed as follows:
a 1b 1Section: circular arc a 1b 1Before cut the male rotor root circle in a 1Point, after cut elliptic arc b 1c 1In b 1The point; Its radius R 5=(0.05 ~ 0.1) * R 1, the O of center outside pitch circle 4The point on.
b 1c 1Section: on male rotor, oval heart O 3Point is at O 1O 2Connecting line on, the oval curve composition 1/4 or more; Its longitudinal axis L=(R 1-R 1j)+(0.1 ~ 0.2) R 1j, minor axis S=(0.85 ~ 0.95) L.
c 1d 1Section: on male rotor, with O 1Centered by the point, R 1Be the radius tooth top arc that draws, angle α 1=1 ~ 3 °.
d 1e 1Section: on female rotor, with O 5Centered by the point, R 6Be the radius d that draws 1e 1The circular arc of section.O wherein 1O 5d 1On a ray, R 6=(0.05 ~ 0.2) R 1j
e 1f 1Section: by straight line e on the male rotor 2f 2Envelope form.
f 1g 1The section: by the center of circle on the male rotor at O 6, radius is the circular arc f of R3 2g 2Envelope forms.
The molded lines of female rotor is composed as follows:
a 2b 2Section: by on male rotor, the O of center outside pitch circle 4On the point, radius is R 5Circular arc a 1b 1The section envelope forms.
b 2c 2Section: by on male rotor, the center is at oval heart O 3Point is at O 1O 2Connecting line on, major axis is L, minor axis is the oval b of S 1c 1The envelope of section forms.
c 2d 2Section: by on male rotor, the center is at O 1On, angle is α 1Tooth top arc c 1d 1Envelope form.
d 2e 2Section: by on male rotor, the center of circle is O 5Point, radius are R 6Circular arc line segment d 1e 1Envelope form.
e 2f 2Section: on female rotor, straight line e 2f 2The section public affairs are cut in d 2e 2Section arc envelope line and circular arc f 2e 2Between, to be smoothly connected two curves.
f 2g 2The section: by the center of circle on the female rotor at O 6, radius is R 3Circular arc form R 3=(0.03 ~ 0.05) R 2j, the center of circle is in nodel line.
In addition, a of yin, yang rotor 2, b 2, c 2, e 2, f 2, g 2, a 1, b 1, c 1, e 1, f 1, g 1Point is public point of contact.
As shown in fig. 1, on the female rotor profile, the circular arc f of the certain radius at passive side outside circle place 2g 2With arc envelope line d 2e 2Between use straight line e 2f 2Be smoothly connected as common tangent.
Elliptic arc b on the male rotor profile 1c 1, be different from conventional circular arc pin tooth curve or its envelope, by the Length Ratio of suitable adjustment ellipse long and short shaft, elliptic arc b 1c 1The engagement that can make male rotor and female rotor with throw off closer to steadily, thereby noise reduction and vibration.
Tooth top circular arc c on the male rotor profile 1d 1Angle can adjust within the specific limits and itself and elliptic arc b 1c 1With circular arc d 1e 1Connection be tangent, thereby particularly smooth.
Double-screw compressor molded lines of rotor of the present invention concrete building process in actual applications is as follows:
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 2Six 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 1Six sections compositions.
(1) makes up generation curve a at male rotor 1b 1, b 1c 1, c 1d 1, d 1e 1
b 1c 1Section: at O 1O 2On the connecting line, from male rotor cylindrical line, level intercepting long L, i.e. L=(R 1-R 1j)+(0.1 ~ 0.2) R 1j, find O 3Point is then from O 3Point intercepts S, i.e. S=(0.85 ~ 0.95) L vertically downward), at last with O 3Centered by the point, L is major axis, and S is minor axis, and elliptic arc b draws 1c 1
a 1b 1Section: outside pitch circle, according to male rotor number of teeth z 1, with angle α 2=(0.55 ~ 0.65) * 2 π/z 1, radius R 5, i.e. R 5=(0.05 ~ 0.1) * R 1, determine center of circle O 4Point is with O 4Centered by the point, with R 5Be radius, draw a that circular arc is cut in root circle 1Point is cut in elliptic arc b 1c 1In b 1Point, a draws 1b 1Circular arc.
c 1d 1Section: with O 1Be the center of circle, draw the male rotor cylindrical, and draw and horizontal sextant angle α 1Ray, obtain c 1d 1Circular arc.
d 1e 1Section: on above-mentioned ray, in the cylindrical alignment, get distance R 6, i.e. R 6=(0.05 ~ 0.2) R 1j, determine O 5Point obtains d 1e 1Circular arc.
(2) the male rotor pitch circle is done pure rolling at the female rotor pitch circle, the spin velocity of the male rotor pitch circle together ratio of tarnsition velocity is z 2/ z 1, be cemented in the circular arc a on the male rotor 1b 1, b 1c 1, c 1d 1, d 1e 1, track, can form the arc envelope line a of female rotor 2b 2, elliptic arc envelope b 2c 2, arc envelope line c 2d 2, arc envelope line d 2e 2
(3) make up generation curve f at female rotor 2g 2, e 2f 2
f 2g 2Section: in pitch circle, according to female rotor number of teeth z 2, with angle α 3=(0.3 ~ 0.4) * 2 π/z 2, radius R 3, i.e. R 3=(0.03 ~ 0.05) R 2j, determine center of circle O 6Point is with O 6Centered by the point, with R 3Be radius, draw the g that circular arc is cut in outside circle 2Point obtains f 2g 2Circular arc.
e 2f 2Section: at f 2g 2Circular arc and arc envelope line d 2e 2Between connect common tangent, namely obtain straight line e 2f 2
(4) the female rotor pitch circle is done pure rolling at the male rotor pitch circle, the spin velocity of the female rotor pitch circle together ratio of tarnsition velocity is z 1/ z 2, be cemented in the circular arc f on the female rotor 2g 2,, e 2f 2Track, can form the arc envelope line f of male rotor 1g 1, lines enveloping line e 1f 1
(5) with a of male rotor 1b 1, b 1c 1, c 1d 1, d 1e 1, e 1f 1, f 1g 1Curve combination is with number of teeth z 1, along center of circle O 1, circumference uniform distribution can obtain the profile of male rotor.A with female rotor 2b 2, b 2c 2, c 2d 2, d 2e 2, e 2f 2, f 2g 2Curve combination is with number of teeth z 1, along center of circle O 1, circumference uniform distribution can obtain the profile of female rotor.
So far, the negative and positive rotor end-face has just been built fully.
In sum, a kind of double-screw compressor molded lines of rotor of the present invention adopts bilateral asymmetric molded lines, make rotor have Line of contact short, reveal that triangle is little, area of passage big, molded lines of rotor is streamlined, reduce advantage such as aerodynamical resistance.Use the helical-lobe compressor of double-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, under the mesolow operating mode, 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 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 (5)
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CN201010602725XA CN102052322B (en) | 2010-12-23 | 2010-12-23 | Twin-screw compressor rotor profile |
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CN201010602725XA CN102052322B (en) | 2010-12-23 | 2010-12-23 | Twin-screw compressor rotor profile |
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CN102052322B CN102052322B (en) | 2012-10-31 |
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Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102352846A (en) * | 2011-10-25 | 2012-02-15 | 上海戈里流体机械有限公司 | Oil-free dry screw compressor rotor |
CN102900672A (en) * | 2011-07-27 | 2013-01-30 | 中国船舶重工集团公司第七一一研究所 | Rotor of oil-free screw compressor |
CN103452841A (en) * | 2012-05-28 | 2013-12-18 | 珠海格力电器股份有限公司 | Double-screw compressor |
CN106286296A (en) * | 2016-10-26 | 2017-01-04 | 上海齐耀膨胀机有限公司 | A kind of flute profile of double-screw compressor rotor |
CN106286295A (en) * | 2016-10-19 | 2017-01-04 | 上海齐耀膨胀机有限公司 | The flute profile of double-screw compressor rotor |
CN106536933A (en) * | 2014-04-25 | 2017-03-22 | 凯撒空压机股份有限公司 | Rotor pair for compressor block of screw machine |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4412796A (en) * | 1981-08-25 | 1983-11-01 | Ingersoll-Rand Company | Helical screw rotor profiles |
CN1248677A (en) * | 1998-09-23 | 2000-03-29 | 复盛股份有限公司 | Serrated form generation method for helical rotor |
JP2008133763A (en) * | 2006-11-28 | 2008-06-12 | Hitachi Industrial Equipment Systems Co Ltd | Screw fluid machine |
CN201232638Y (en) * | 2008-05-09 | 2009-05-06 | 郑良才 | Screw for screw compressor |
CN101435425A (en) * | 2008-12-12 | 2009-05-20 | 中国船舶重工集团公司第七一一研究所 | Novel tooth form of screw rod rotor of double-screw compressor |
CN101451527A (en) * | 2007-12-03 | 2009-06-10 | 万晓青 | Novel screw compressor end face serrate |
-
2010
- 2010-12-23 CN CN201010602725XA patent/CN102052322B/en not_active IP Right Cessation
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4412796A (en) * | 1981-08-25 | 1983-11-01 | Ingersoll-Rand Company | Helical screw rotor profiles |
CN1248677A (en) * | 1998-09-23 | 2000-03-29 | 复盛股份有限公司 | Serrated form generation method for helical rotor |
JP2008133763A (en) * | 2006-11-28 | 2008-06-12 | Hitachi Industrial Equipment Systems Co Ltd | Screw fluid machine |
CN101451527A (en) * | 2007-12-03 | 2009-06-10 | 万晓青 | Novel screw compressor end face serrate |
CN201232638Y (en) * | 2008-05-09 | 2009-05-06 | 郑良才 | Screw for screw compressor |
CN101435425A (en) * | 2008-12-12 | 2009-05-20 | 中国船舶重工集团公司第七一一研究所 | Novel tooth form of screw rod rotor of double-screw compressor |
Cited By (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102900672A (en) * | 2011-07-27 | 2013-01-30 | 中国船舶重工集团公司第七一一研究所 | Rotor of oil-free screw compressor |
CN102352846A (en) * | 2011-10-25 | 2012-02-15 | 上海戈里流体机械有限公司 | Oil-free dry screw compressor rotor |
CN102352846B (en) * | 2011-10-25 | 2013-09-18 | 上海戈里流体机械有限公司 | Oil-free dry screw compressor rotor |
CN103452841A (en) * | 2012-05-28 | 2013-12-18 | 珠海格力电器股份有限公司 | Double-screw compressor |
US10400769B2 (en) | 2014-04-25 | 2019-09-03 | Kaeser Kompressoren Se | Rotor pair for a compression block of a screw machine |
CN106536933A (en) * | 2014-04-25 | 2017-03-22 | 凯撒空压机股份有限公司 | Rotor pair for compressor block of screw machine |
CN106536933B (en) * | 2014-04-25 | 2019-07-12 | 凯撒空压机股份有限公司 | The rotor pair of compressor set for screw machine |
CN106286295A (en) * | 2016-10-19 | 2017-01-04 | 上海齐耀膨胀机有限公司 | The flute profile of double-screw compressor rotor |
CN106286295B (en) * | 2016-10-19 | 2018-08-28 | 上海齐耀膨胀机有限公司 | The flute profile of double-screw compressor rotor |
CN106286296B (en) * | 2016-10-26 | 2018-07-27 | 上海齐耀膨胀机有限公司 | A kind of flute profile of double-screw compressor rotor |
CN106286296A (en) * | 2016-10-26 | 2017-01-04 | 上海齐耀膨胀机有限公司 | A kind of flute profile of double-screw compressor rotor |
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