CN102052322A - Twin-screw compressor rotor profile - Google Patents

Twin-screw compressor rotor profile Download PDF

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Publication number
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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CN
China
Prior art keywords
rotor
arc
point
profile
circular arc
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CN 201010602725
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Chinese (zh)
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CN102052322B (en
Inventor
张玉新
刘琦
董勇搏
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上海耐浦流体机械科技有限公司
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Priority to CN201010602725XA priority Critical patent/CN102052322B/en
Publication of CN102052322A publication Critical patent/CN102052322A/en
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Publication of CN102052322B publication Critical patent/CN102052322B/en

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Abstract

The invention relates to a twin-screw compressor rotor profile, wherein a two-side asymmetric profile is adopted, six sections of profiles are combined to form end face profiles of a female rotor and a male rotor, and the female rotor and the male rotor which are identical in central distance A and different in size are combined to a form a female/male rotor profile series of a screw compressor. An arc f2g2 with a certain radius and an arc envelope d2e2 at the addendum circle on the passive side of the female rotor end face profile are in smooth connection through taking a straight line e2f2 as a common tangent. The elliptic arc b1c1 on the male rotor end face profile is different from the ordinary arc pin tooth curve or the envelope and can enable the engagement and releasing of the male and female rotors to be more stable through properly adjusting the length ratio of the major and minor axes of the ellipse, so as to reduce noise and vibration. The included angle of the addendum arc c1d1 on the male rotor end face profile can be adjusted, and the addendum arc c1d1 is in tangent and smooth connection with both the elliptic arc b1c1 and an arc d1e1. The invention endows the rotors with the advantages of short contact line, small disclosed triangle, big flow passage area, streamlined rotor profile, reduced aerodynamic resistance and the like.

Description

A kind of double-screw compressor molded lines of rotor

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)

1. double-screw compressor molded lines of rotor, it is characterized in that, adopt bilateral asymmetric molded lines, form yin, yang rotor end-face molded lines, 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 by six segment type lines;
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.
2. double-screw compressor molded lines of rotor according to claim 1 is characterized in that, 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.
3. twin-screw compressor rotor profile according to claim 1 is characterized in that, on the described female rotor profile, and 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.
4. twin-screw compressor rotor profile according to claim 1 is characterized in that, the 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.
5. twin-screw compressor rotor profile according to claim 1 is characterized in that, the 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.
CN201010602725XA 2010-12-23 2010-12-23 Twin-screw compressor rotor profile CN102052322B (en)

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Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
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CN102052322B CN102052322B (en) 2012-10-31

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Cited By (6)

* Cited by examiner, † Cited by third party
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

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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

Patent Citations (6)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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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