CN202215474U - Rotor of oil free screw compressor - Google Patents

Rotor of oil free screw compressor Download PDF

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Publication number
CN202215474U
CN202215474U CN2011202676453U CN201120267645U CN202215474U CN 202215474 U CN202215474 U CN 202215474U CN 2011202676453 U CN2011202676453 U CN 2011202676453U CN 201120267645 U CN201120267645 U CN 201120267645U CN 202215474 U CN202215474 U CN 202215474U
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China
Prior art keywords
section
rotor
tooth curve
radius
center
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CN2011202676453U
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Inventor
蔡宏
钟子健
杨毅
杨剑
胡涛
刘涛
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Shanghai Qiyao Screw Machinery Co., Ltd.
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711th Research Institute of CSIC
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Abstract

The utility model relates to a rotor of an oil free screw compressor, which comprises a male rotor and a female rotor. The tooth of the rotor is in the bilateral unsymmetrical shape, the end face shaped line of the female rotor comprises five sections of arcs, a section of arc envelope curve and a section of oval envelope curve, and the end face shaped line of the male rotor comprises five sections of arcs, a section of arc envelope curve and a section of oval. The tooth-shaped line is designed to enable the tooth-shaped adjacent curves to conduct smooth transition at the connection points, and the tooth-shaped area is larger in utilization coefficient.

Description

The rotor of oil free screw compressor
Technical field
The utility model relates to a kind of rotor of oil free screw compressor, especially relates to the rotor of the oil free screw compressor that improves the end face flute profile.
Background technique
Along with the technical merit of helical-lobe compressor is constantly ripe, its application is extended to process gas fields such as oil, chemical industry, coal, iron and steel gradually by aerodynamic force, refrigeration air-conditioner.In the rotor of helical lobe compressor design, the most important thing is to design molded lines, it has determined the performance quality of helical-lobe compressor.Be made up of etc. point, cycloid, circular arc to the oil free screw compressor flute profile of process gas field exploitation at present and form, often there is cusp in molded lines, and processing is difficulty comparatively, produces bigger fluid dynamic loss when rotating speed is higher; Secondly, the area utilization factor of molded lines generally about 0.5, has good rigidity under the high pressure operating mode, then have volume flow shortcoming less than normal but be used for the low pressure operating mode, is used for the low pressure and mass flow occasion and need adopts bigger root diameter, and cost is higher.
The model utility content
The utility model technical problem to be solved provides a kind of rotor of oil free screw compressor, and its flute profile adjacent curve is in the tie point smooth transition, and the flute profile area utilization factor is bigger.
The utility model is to solve the problems of the technologies described above the rotor that the technological scheme that adopts is a kind of oil free screw compressor of proposition, and said rotor comprises male rotor and female rotor, and wherein the negative and positive rotor centre distance is A, and the female rotor Pitch radius is r 2t, the male rotor Pitch radius is r 1t, the diameter of female rotor and male rotor is D 0, rotor tooth depth radius is r, Outside radius is r 0, wherein:
A＝r 1t+r 2t
D 0＝r 2t+r 0＝r 1t+r
The female rotor molded lines is by curved section A 2B 2, B 2C 2, C 2D 2, D 2E 2, E 2F 2, F 2G 2, G 2H 2Form, the male rotor molded lines is by curved section A 1B 1, B 1C 1, C 1D 1, D 1E 1, E 1F 1, F 1G 1, G 1H 1Form, each curved section is by the combination name of the point of starting point and terminal point;
Wherein, the molded lines of female rotor is formed as follows: first section tooth curve A 2B 2Be one section 1/4 circular arc, O is put in its center of circle on the female rotor pitch circle 4, radius is r 0Second section tooth curve B 2C 2Be one section elliptic arc, its center is at pitch circle intersection point P, and the minor axis end points is C 2, elliptic arc and female rotor pitch circle meet at a B 2, elliptic arc is at a B 2Tangent line through the female rotor center O 2The 3rd section tooth curve C 2D 2Be one section circular arc, its center of circle is at pitch circle intersection point P, and radius is r, some C 2At rotor centerline O 1O 2On; The 4th section tooth curve D 2E 2Be one section arc envelope line, with male rotor tooth curve D 1E 1Conjugate curve each other; The 5th section tooth curve E 2F 2Be one section circular arc, this circular arc is at an E 2With the tooth curve D 2E 2Tangent, meet at a F with the female rotor pitch circle 2, circular arc is at a F 2The tangent line at place is through the female rotor center O 2The 6th section tooth curve F 2G 2Be one section 1/4 circular arc, O is put in its center of circle on the female rotor pitch circle 7, radius is r 0The 7th section tooth curve G 2H 2Be one section circular arc, its center of circle is in the female rotor center O 2, radius is r 2t, O 2H 2Line and O 2A 2The line angle be 72 °;
The molded lines of male rotor is formed as follows: first section tooth curve A 1B 1Be one section 1/4 circular arc, O is put in its center of circle on the female rotor pitch circle 3, radius is r 0Second section tooth curve B 1C 1Be one section oval envelope, with female rotor tooth curve B 2C 2Conjugate curve each other, its end points C 1With put C on the female rotor tooth curve 2Overlap; The 3rd section tooth curve C 2D 2Be one section circular arc, with female rotor tooth curve C 1D 1Overlap; The 4th section tooth curve D 1E 1Be one section circular arc, its center is at PD 1Line on put O 5The 5th section tooth curve E 1F 1Be one section arc envelope line, with female rotor tooth curve E 2F 2Conjugate curve each other, its end points F 1Be positioned on the male rotor pitch circle; The 6th section tooth curve F 1G 1Be one section 1/4 circular arc, O is put in its center of circle on the female rotor pitch circle 6, radius is r 0The 7th section tooth curve G 1H 1Be one section circular arc, its center of circle is in the female rotor center O 2, radius is r 1t, O 1H 1Line and O 1A 1The line angle be 120 °.
In an embodiment of the utility model; According to conjugate relation, female rotor Pitch radius male rotor Pitch radius
Figure BDA0000078821110000022
In an embodiment of the utility model, the tooth depth radius r is got (0.43～0.45) r 2t, r 0By r 0=r 1t+ r-r 2tObtain.
In an embodiment of the utility model, straightway O 2E 2Length get (0.96～0.97) r 2t
In an embodiment of the utility model, PD 2With O 1O 2Angle tD 2It is 8～10 °.
The oil free screw compressor rotor that the utility model proposed, its flute profile adjacent curve is in the tie point smooth transition, and air resistance is little, and power performance is preferably still arranged under high rotating speed; The flute profile area utilization factor can reach 0.58 simultaneously, and under identical root diameter, tolerance surpasses existing oil free screw compressor 16%, is fit to very much the low pressure and mass flow occasion of process gas field extensive market.
Description of drawings
For letting above-mentioned purpose, the feature and advantage of the utility model can be more obviously understandable, elaborate below in conjunction with the embodiment of accompanying drawing to the utility model, wherein:
Fig. 1 is the flute profile general illustration of the utility model one embodiment's oil free screw compressor rotor.
Fig. 2 is the flute profile detailed maps of the utility model one embodiment's oil free screw compressor rotor.
Embodiment
Fig. 1 is the flute profile general illustration of the utility model one embodiment's oil free screw compressor rotor.Rotor comprises female rotor 20 and male rotor 10.The center of female rotor 20 is O 2, the center of male rotor 10 is O 1Rotor pitch circle intersection point is P.
The negative and positive rotor centre distance is A, and the female rotor Pitch radius is r 2t, the male rotor Pitch radius is r 1t, the diameter of female rotor and male rotor is D 0Rotor tooth depth radius is r, and Outside radius is r 0Above-mentioned these parameters satisfy:
A＝r 1t+r 2t
D 0＝r 2t+r 0＝r 1t+r
According to the rotor of helical lobe compressor flute profile that Fig. 1 makes, the female rotor molded lines is by A 2B 2, B 2C 2, C 2D 2, D 2E 2, E 2F 2, F 2G 2, G 2H 2, the male rotor molded lines is by A 1B 1, B 1C 1, C 1D 1, D 1E 1, E 1F 1, F 1G 1, G 1H 1Form.As shown in Figure 2, each curved section is by the combination name of the point of starting point and terminal point.
In an embodiment of the utility model, generate the rotor flute profile according to the following steps:
(1) confirm compressor negative and positive rotor centre distance A: according to conjugate relation, female rotor Pitch radius
Figure BDA0000078821110000031
male rotor Pitch radius
Figure BDA0000078821110000032
(2) confirm tooth depth radius r and Outside radius r 0, in order to obtain bigger between cog area utilization factor, the tooth depth radius r is got (0.43～0.45) r 2t, r 0Can be by r 0=r 1t+ r-r 2tObtain.
(3) generate the tooth curve C 2D 2And C 1D 1: the tooth curve C 2D 2And C 1D 1Being with P is the center, and radius is the circular arc of r, PD 2With O 1O 2Angle tD 2Get (8～10 °), be convenient to the male rotor tooth top and inlay sealed muscle, adapt to the worst hot case of oil free screw compressor.
(4) generate the tooth curve D 1E 1And D 2E 2, the tooth curve D 1E 1Be circular arc, center O 5At line PD 2On, radius is r 1Get (0.43～0.45) r, O 5E 1With O 5D 1Angle t E1By D 1E 1Conjugation tooth curve D 2E 2End points E2 position is confirmed.According to the tooth curve D 1E 1Obtain conjugation tooth curve D 2E 2
In one embodiment, in order to reduce to reveal triangle area, guarantee E simultaneously 2F 2Can with top circle F 2G 2Smooth transition, straightway O 2E 2Length get (0.96～0.97) r 2t, confirm t according to this condition E1
(5) generate tooth curve E 2F 2And E 1F 1: tooth curve E 2F 2Be circular arc, with the tooth curve D 2E 2At E 2Point is tangent, with tooth top circular arc F 2G 2At a F 2Tangent.Make the tooth curve D 2E 2At an E 2Normal, by tangent relation, circular arc E 2F 2Centre point O 8Be positioned on this normal.By phase tangent condition, O 8F 2With O 2F 2Vertically, can confirm circular arc circular arc E by this condition 2F 2Radius, and make circular arc E according to this 2F 2According to tooth curve E 2F 2Obtain conjugation tooth curve E 1F 1
(6) generate tooth curve F 2G 2And F 1G 1: tooth curve F 2G 2Be circular arc, the center of circle is on the female rotor pitch circle, and radius is r 0, with circular arc and in a F 2Tooth curve F 1G 1Be circular arc, the center of circle is on the male rotor pitch circle, and radius is r 0, with circular arc and in a F 1
(7) generate the tooth curve B 2C 2And B 1C 1: the tooth curve B 2C 2Be elliptic arc, its center is at pitch circle intersection point P, and the minor axis end points is C 2, minor axis length is r, long axis length is confirmed by the phase tangent condition: elliptic arc B 2C 2At a B 2Tangent line through the female rotor center O 2According to the tooth curve B 2C 2Obtain conjugation tooth curve B 1C 1
(8) generate the tooth curve A 2B 2And A 1B 1: the tooth curve A 2B 2Be circular arc, the center of circle is on the female rotor pitch circle, and radius is r 0, with circular arc and in an A 2The tooth curve A 1B 1Be circular arc, the center of circle is on the male rotor pitch circle, and radius is r 0, with circular arc and in an A 1
(9) generate tooth curve G 2H 2And G 1H 1: tooth curve G 2H 2Be circular arc, the center of circle is at the female rotor center, and radius is r 2t, O 2H 2Line and O 2A 2The line angle be 72 °.Tooth curve G 1H 1Be circular arc, the center of circle is at the female rotor center, and radius is r 1t, O 1H 1Line and O 1A 1The line angle be 72 °.
According to the rotor flute profile that above-mentioned steps generated is bilateral asymmetrical type, and female rotor end face molded lines comprises five sections circular arcs, one section arc envelope line and one section oval envelope, and male rotor end face molded lines comprises five sections circular arcs, one section arc envelope line and one section ellipse.The concrete composition of tooth curve is following:
(1) molded lines of female rotor 20 is formed:
First section tooth curve A of female rotor 2B 2Be one section 1/4 circular arc, O is put in its center of circle on the female rotor pitch circle 4, radius is r 0
Second section tooth curve B of female rotor 2C 2Be one section elliptic arc, its center is at pitch circle intersection point P, and the minor axis end points is C 2, elliptic arc and female rotor pitch circle meet at a B 2, elliptic arc is at a B 2Tangent line through the female rotor center O 2
The 3rd section tooth curve C of female rotor 2D 2Be one section circular arc, its center of circle is at pitch circle intersection point P, and radius is r, some C 2At rotor centerline O 1O 2On.
The 4th section tooth curve D of female rotor 2E 2Be one section arc envelope line, with male rotor tooth curve D 1E 1Conjugate curve each other.
The 5th section tooth curve E of female rotor 2F 2Be one section circular arc, this circular arc is at an E 2With the tooth curve D 2E 2Tangent, meet at a F with the female rotor pitch circle 2, circular arc is at a F 2The tangent line at place is through the female rotor center O 2
The 6th section tooth curve F of female rotor 2G 2Be one section 1/4 circular arc, O is put in its center of circle on the female rotor pitch circle 7, radius is r 0
The 7th section tooth curve G of female rotor 2H 2Be one section circular arc, its center of circle is in the female rotor center O 2, radius is r 2t, O 2H 2Line and O 2A 2The line angle be 72 °.
(2) molded lines of male rotor 10 is formed:
First section tooth curve A of male rotor 1B 1Be one section 1/4 circular arc, O is put in its center of circle on the female rotor pitch circle 3, radius is r 0
Second section tooth curve B of male rotor 1C 1Be one section oval envelope, with female rotor tooth curve B 2C 2Conjugate curve each other, its end points C 1With put C on the female rotor tooth curve 2Overlap.
The 3rd section tooth curve C of male rotor 2D 2Be one section circular arc, with female rotor tooth curve C 1D 1Overlap.
The 4th section tooth curve D of male rotor 1E 1Be one section circular arc, its center is at PD 1Line on put O 5
The 5th section tooth curve E of male rotor 1F 1Be one section arc envelope line, with female rotor tooth curve E 2F 2Conjugate curve each other, its end points F 1Be positioned on the male rotor pitch circle.
The 6th section tooth curve F of male rotor 1G 1Be one section 1/4 circular arc, O is put in its center of circle on the female rotor pitch circle 6, radius is r 0
The 7th section tooth curve G of male rotor 1H 1Be one section circular arc, its center of circle is in the female rotor center O 2, radius is r 1t, O 1H 1Line and O 1A 1The line angle be 120 °.
Like this, the tooth curve A that each line segment was linked to be of female rotor 20 2-B 2-C 2-D 2-E 2-F 2-G 2-H 2Smoothed curve.Equally, the tooth curve that each line segment was linked to be of male rotor 10, A 1-B 1-C 1-D 1-E 1-F 1-G 1-H 1It also is smoothed curve.
The area utilization factor C of helical-lobe compressor N1Confirm by following formula:
C n 1 = z 1 ( A 01 + A 02 ) D 0 2
Z wherein 1Be the male rotor number of teeth, A 01, A 02Be respectively negative and positive rotor end-face between cog area.The rotor flute profile of the utility model adopts bigger tooth depth radius, makes A 01, A 02Reach and reach 0.1045D respectively 0 2, 0.0894D 0 2, area utilization factor C N1Surpass 0.58, under identical root diameter, tolerance increases obviously.
Though the utility model discloses as above with preferred embodiment; Right its is not in order to limit the utility model; Any those skilled in the art; In spirit that does not break away from the utility model and scope, when can doing a little modification and perfect, so the protection domain of the utility model is when being as the criterion with what claims defined.

Claims (5)

1. the rotor of an oil free screw compressor, said rotor comprises male rotor and female rotor, and wherein the negative and positive rotor centre distance is A, and the female rotor Pitch radius is r 2t, the male rotor Pitch radius is r 1t, the diameter of female rotor and male rotor is D 0, rotor tooth depth radius is r, Outside radius is r 0, it is characterized in that:
A＝r 1t+r 2t
D 0＝r 2t+r 0＝r 1t+r
Said female rotor molded lines is by curved section A 2B 2, B 2C 2, C 2D 2, D 2E 2, E 2F 2, F 2G 2, G 2H 2Form, said male rotor molded lines is by curved section A 1B 1, B 1C 1, C 1D 1, D 1E 1, E 1F 1, F 1G 1, G 1H 1Form, each curved section is by the combination name of the point of starting point and terminal point;
Wherein, the molded lines of female rotor is formed as follows:
First section tooth curve A 2B 2Be one section 1/4 circular arc, O is put in its center of circle on the female rotor pitch circle 4, radius is r 0
Second section tooth curve B 2C 2Be one section elliptic arc, its center is at pitch circle intersection point P, and the minor axis end points is C 2, elliptic arc and female rotor pitch circle meet at a B 2, elliptic arc is at a B 2Tangent line through the female rotor center O 2
The 3rd section tooth curve C 2D 2Be one section circular arc, its center of circle is at pitch circle intersection point P, and radius is r, some C 2At rotor centerline O 1O 2On;
The 4th section tooth curve D 2E 2Be one section arc envelope line, with male rotor tooth curve D 1E 1Conjugate curve each other;
The 5th section tooth curve E 2F 2Be one section circular arc, this circular arc is at an E 2With the tooth curve D 2E 2Tangent, meet at a F with the female rotor pitch circle 2, circular arc is at a F 2The tangent line at place is through the female rotor center O 2
The 6th section tooth curve F 2G 2Be one section 1/4 circular arc, O is put in its center of circle on the female rotor pitch circle 7, radius is r 0
The 7th section tooth curve G 2H 2Be one section circular arc, its center of circle is in the female rotor center O 2, radius is r 2t, O 2H 2Line and O 2A 2The line angle be 72 °;
The molded lines of male rotor is formed as follows:
First section tooth curve A 1B 1Be one section 1/4 circular arc, O is put in its center of circle on the female rotor pitch circle 3, radius is r 0
Second section tooth curve B 1C 1Be one section oval envelope, with female rotor tooth curve B 2C 2Conjugate curve each other, its end points C 1With put C on the female rotor tooth curve 2Overlap;
The 3rd section tooth curve C 2D 2Be one section circular arc, with female rotor tooth curve C 1D 1Overlap;
The 4th section tooth curve D 1E 1Be one section circular arc, its center is at PD 1Line on put O 5
The 5th section tooth curve E 1F 1Be one section arc envelope line, with female rotor tooth curve E 2F 2Conjugate curve each other, its end points F 1Be positioned on the male rotor pitch circle;
The 6th section tooth curve F 1G 1Be one section 1/4 circular arc, O is put in its center of circle on the female rotor pitch circle 6, radius is r 0
The 7th section tooth curve G 1H 1Be one section circular arc, its center of circle is in the female rotor center O 2, radius is r 1t, O 1H 1Line and O 1A 1The line angle be 120 °.
2. the rotor of oil free screw compressor as claimed in claim 1 is characterized in that,
According to conjugate relation, female rotor Pitch radius
Figure FDA0000078821100000021
male rotor Pitch radius
Figure FDA0000078821100000022
3. the rotor of oil free screw compressor as claimed in claim 1 is characterized in that, the tooth depth radius r is got (0.43～0.45) r 2t, r 0By r 0=r 1t+ r-r 2tObtain.
4. the rotor of oil free screw compressor as claimed in claim 1 is characterized in that, straightway O 2E 2Length get (0.96～0.97) r 2t
5. the rotor of oil free screw compressor as claimed in claim 1 is characterized in that, PD 2With O 1O 2Angle tD 2It is 8～10 °.
CN2011202676453U 2011-07-27 2011-07-27 Rotor of oil free screw compressor Expired - Lifetime CN202215474U (en)

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Cited By (7)

* 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
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
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
CN103291619A (en) * 2013-07-03 2013-09-11 上海齐耀螺杆机械有限公司 Double-screw compressor rotor molded line for oil injection
CN103807171A (en) * 2012-11-07 2014-05-21 廖振宜 Chinese style rotor type gas compressor
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
CN110685909A (en) * 2019-11-01 2020-01-14 西安交通大学 Full-ellipse and ellipse enveloping type double-screw rotor, compressor and expander

Cited By (12)

* 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
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
CN103807171A (en) * 2012-11-07 2014-05-21 廖振宜 Chinese style rotor type gas 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
CN103291619A (en) * 2013-07-03 2013-09-11 上海齐耀螺杆机械有限公司 Double-screw compressor rotor molded line for oil injection
CN103291619B (en) * 2013-07-03 2015-06-17 上海齐耀螺杆机械有限公司 Double-screw compressor rotor molded line for oil injection
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
CN110685909A (en) * 2019-11-01 2020-01-14 西安交通大学 Full-ellipse and ellipse enveloping type double-screw rotor, compressor and expander
CN110685909B (en) * 2019-11-01 2021-01-19 西安交通大学 Double-screw rotor, compressor and expander

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Owner name: SHANGHAI QIYAO SCREW MACHINERY CO., LTD.

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Effective date of registration: 20140617

Address after: 200072 No. 2801, Gonghe Road, Shanghai, Zhabei District

Patentee after: Shanghai Qiyao Screw Machinery Co., Ltd.

Address before: 201108 Shanghai city Minhang District Huaning Road No. 3111

Patentee before: The 711th Research Institute of China Shipbuilding Industrial Corporation(CSIC)

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Granted publication date: 20120509

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