CN110374871A - A kind of oil-free double-screw compressor molded lines of rotor - Google Patents
A kind of oil-free double-screw compressor molded lines of rotor Download PDFInfo
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- CN110374871A CN110374871A CN201910706149.4A CN201910706149A CN110374871A CN 110374871 A CN110374871 A CN 110374871A CN 201910706149 A CN201910706149 A CN 201910706149A CN 110374871 A CN110374871 A CN 110374871A
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- Prior art keywords
- point
- rotor
- line segment
- circle
- line
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/082—Details specially related to intermeshing engagement type pumps
- F04C18/084—Toothed wheels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/14—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons
- F04C18/16—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/20—Rotors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The present invention relates to compressor drum technical fields, a kind of specifically oil-free double-screw compressor molded lines of rotor, including male rotor and female rotor, using bilateral asymmetric molded line, it is characterized in that the male rotor is 4 teeth, female rotor is 6 teeth, yin is formed by eight segment type lines, male rotor profile, with identical center away from A and different yin, male rotor constitutes the molded line of the yin-yang rotor of helical-lobe compressor, the present invention is compared with the existing technology, the advantage is that: the high radius R of biggish tooth is used to reach 0.49 to obtain biggish area utilization factor, to make volumetric efficiency improve；Leakage triangle area reduce axial seal effect using point gerotor structure in compressed side to reach most preferably, and so that contact line length is reached minimum using arc surface in driving side, reduces lateral leakage.
Description
Technical field
The present invention relates to compressor drum technical field, a kind of specifically oil-free double-screw compressor molded lines of rotor.
Background technique
Twin-screw compressor rotor profile is the basis of Performance of Oil-Injected Screw Compressor, and a kind of good molded lines of rotor is fundamentally determined
The overall performance of helical-lobe compressor is determined.Yin-yang rotor molded line is by several sections of different primary or secondary mathematic curve such as circular arcs and circle
The composition such as arc envelope, point (straight line) cycloid, ellipse and oval envelope curve, parabola and parabola envelope, yin-yang rotor it
Between each section of corresponding curve be all to be obtained according to engagement envelope principle parsing, and tangent connection between different curve is smooth
Transition.A kind of outstanding molded lines of rotor requires tooth form smooth (flow losses are small), contact line closing and (sealing effect as short as possible
Well), good (easy to process), small (machinery of female rotor negative moment area of leakage triangle small (reducing internal leakage), Grindability
It is high-efficient).Point (straight line) cycloid (more sensitive to engagement property, processability) that contemporary Profile Design has abandoned early stage is and complete
Portion uses smooth mathematic curve (such as circular arc, ellipse, parabola), by the sealing means of rotor seal avris by traditional point
The sealing of (line)-camber line is converted into camber line-camber line band, reduces internal leakage, improves volumetric efficiency.
China discloses a patent of invention: twin-screw compressor rotor profile, application number: 2013105883196, which sets
The twin-screw compressor rotor profile counted a kind of stable drive, vibration and noise can be reduced, but the patent is primarily adapted for use in height
Pressure field.
Summary of the invention
It is an object of the invention to solve the deficiencies in the prior art, a kind of volumetric efficiency height is provided, leakage is low, and pressure ratio is suitable
In, the molded lines of rotor suitable for oil-free mesolow field.
To achieve the goals above, a kind of oil-free double-screw compressor molded lines of rotor, including male rotor and female rotor are designed,
Using bilateral asymmetric molded line, it is characterised in that the male rotor is 4 teeth, and female rotor is 6 teeth, forms yin, yang by eight segment type lines
Rotor end-face molded line is constituted the type of the yin-yang rotor of helical-lobe compressor with identical center away from A and different yin, yang rotors
Line,
Female rotor molded line includes:
E2F2: making circular arc by the high radius R of center of circle tooth of node O4, take two o'clock E2, F2, so that O4E2 and O4F2 and O1O2 line
Angle is equal to 1=10 ° of α, obtains line segment E2F2；
D2E2: extending O4E2 to O3, and using O3 as the center of circle, (e+R) is that radius makees circular arc since E2 point, makees all along this circular arc
Line, point of contact are D2 point, intersect at female rotor pitch circle C2 point, so that the angle of O2C2 and this tangent line is 20 °, obtain line segment D2E2；
C2D2: circular arc D2E2 tangent line and O2C2 angle is 20 °, and D2 is point of contact, and C2 is met at pitch circle；
B2C2: using O2 as the center of circle, D2o is that diameter makees an addendum circle arc, and the center of circle is made since C2 point by radius of r on pitch circle
One transition arc and addendum circle arc are tangential on B2 point, obtain line segment B2C2；
A2B2: using O2 as the center of circle, D2o is that diameter makees an addendum circle arc, determines B2 point by B2C2 line segment, A2 point is by line segment below
H2A2 is determined；
F2G2: the line segment with male rotor F1 point conjugation is determined that F1 point is overlapped with F2 point by F1 point, and G2 point is F1 point as sun turns
Sub- pitch circle rolls the final on trajectory to be formed, and O4G2 and O2G2 line form right-angle relationship；
G2H2:, which connecting O2G2, and extends to female rotor pitch circle meets at H2 point, forms line segment G2H2；
H2A2: using O2 as the center of circle, D2o is that diameter makees an addendum circle arc, and the center of circle is made since H2 point by radius of r on pitch circle
Also thus one transition arc and addendum circle arc are tangential on A2 point, obtain line segment H2A2. A2 point once determination, while A2B2 line segment
It determines；
Male rotor molded line includes:
E1F1: it is determined by female rotor E2F2, is overlapped with E2F2；
D1E1: it is conjugated the line segment to be formed with D2E2 on female rotor, is determined by D2E2；
C1D1: it is conjugated the line segment to be formed with female rotor C2D2, is determined by C2D2；
B1C1: it is conjugated the line segment to be formed with female rotor B2C2, is determined by B2C2；
A1B1: it is conjugated the line segment to be formed with female rotor B2A2 line segment, is determined by B2A2；
F1G1: male rotor is motionless, and female rotor pitch circle rolls the one section of track marked by G2 point, the line segment with G2 point conjugation；
G1H1: it is conjugated the line segment to be formed with female rotor G2H2 line segment, is determined by G2H2；
H1A1: it is conjugated the line segment to be formed with female rotor H2A2, is determined by H2A2.
The present invention compared with the existing technology, the advantage is that:
1. using the high radius R of biggish tooth to reach 0.49 to obtain biggish area utilization factor, so that volumetric efficiency be made to mention
It is high.
2. leakage triangle area reduce axial seal effect using point gerotor structure in compressed side to reach most preferably,
And so that contact line length is reached minimum using arc surface in driving side, reduce lateral leakage.
3. while the proportion yin-yang rotor root diameter of 4/6 tooth is close, rigidity is preferable, in the item of higher tooth tip velocity
Efficiency with higher, comprehensive performance are preferable under part.
Detailed description of the invention
Fig. 1 is molded lines of rotor schematic diagram of the present invention.
Specific embodiment
The technical program is further explained in conjunction with attached drawing.
Embodiment one: referring to Fig. 1
Yin-yang rotor size is as follows:
Center is away from A=O2O1；The male rotor number of teeth: Z1=4；The female rotor number of teeth: Z2=6；The high radius of tooth: R=(0.26 ~ 0.27) A；Yin
Rotor height of teeth top: r=(0.022 ~ 0.024) A；Female rotor pitch diameter: Dw2=A*2*Z2/ (Z1+Z2)=1.2A；Male rotor pitch circle
Diameter: Dw1=A*2*Z1/ (Z1+Z2)=0.8A；Female rotor outside circle outer diameter: D2o=Dw2+2r；Male rotor outside circle outer diameter:
D1o= Dw1+2R；Female rotor root circle outer diameter: D2i=Dw2-2R；Male rotor root circle outer diameter: D1i=Dw1-2r；Shielding angle: α 1
=10°；
e=(0.09~0.11)A。
Embodiment two: referring to Fig. 1
Female rotor molded line includes:
E2F2: making circular arc by the high radius R of center of circle tooth of node O4, take two o'clock E2, F2, so that O4E2 and O4F2 and O1O2 line
Angle is equal to 1=10 ° of α, obtains line segment E2F2；
D2E2: extending O4E2 to O3, and using O3 as the center of circle, (e+R) is that radius makees circular arc since E2 point, makees all along this circular arc
Line, point of contact are D2 point, intersect at female rotor pitch circle C2 point, so that the angle of O2C2 and this tangent line is 20 °, obtain line segment D2E2；
C2D2: circular arc D2E2 tangent line and O2C2 angle is 20 °, and D2 is point of contact, and C2 is met at pitch circle；
B2C2: using O2 as the center of circle, D2o is that diameter makees an addendum circle arc, and the center of circle is made since C2 point by radius of r on pitch circle
One transition arc and addendum circle arc are tangential on B2 point, obtain line segment B2C2；
A2B2: using O2 as the center of circle, D2o is that diameter makees an addendum circle arc, determines B2 point by B2C2 line segment, A2 point is by line segment below
H2A2 is determined；
F2G2: the line segment with male rotor F1 point conjugation is determined that F1 point is overlapped with F2 point by F1 point, and G2 point is F1 point as sun turns
Sub- pitch circle rolls the final on trajectory to be formed, and O4G2 and O2G2 line form right-angle relationship；
G2H2:, which connecting O2G2, and extends to female rotor pitch circle meets at H2 point, forms line segment G2H2；
H2A2: using O2 as the center of circle, D2o is that diameter makees an addendum circle arc, and the center of circle is made since H2 point by radius of r on pitch circle
Also thus one transition arc and addendum circle arc are tangential on A2 point, obtain line segment H2A2. A2 point once determination, while A2B2 line segment
It determines；
Male rotor molded line includes:
E1F1: it is determined by female rotor E2F2, is overlapped with E2F2；
D1E1: it is conjugated the line segment to be formed with D2E2 on female rotor, is determined by D2E2；
C1D1: it is conjugated the line segment to be formed with female rotor C2D2, is determined by C2D2；
B1C1: it is conjugated the line segment to be formed with female rotor B2C2, is determined by B2C2；
A1B1: it is conjugated the line segment to be formed with female rotor B2A2 line segment, is determined by B2A2；
F1G1: male rotor is motionless, and female rotor pitch circle rolls the one section of track marked by G2 point, the line segment with G2 point conjugation；
G1H1: it is conjugated the line segment to be formed with female rotor G2H2 line segment, is determined by G2H2；
H1A1: it is conjugated the line segment to be formed with female rotor H2A2, is determined by H2A2.
Claims (1)
1. a kind of oil-free double-screw compressor molded lines of rotor, including male rotor and female rotor, special using bilateral asymmetric molded line
Sign is that the male rotor is 4 teeth, and female rotor is 6 teeth, yin, yang rotor end-face molded line is formed by eight segment type lines, in identical
The heart constitutes the molded line of the yin-yang rotor of helical-lobe compressor away from A and different yin, yang rotors,
Female rotor molded line includes:
E2F2: making circular arc by the high radius R of center of circle tooth of node O4, take two o'clock E2, F2, so that O4E2 and O4F2 and O1O2 line
Angle is equal to 1=10 ° of α, obtains line segment E2F2；
D2E2: extending O4E2 to O3, and using O3 as the center of circle, (e+R) is that radius makees circular arc since E2 point, makees all along this circular arc
Line, point of contact are D2 point, intersect at female rotor pitch circle C2 point, so that the angle of O2C2 and this tangent line is 20 °, obtain line segment D2E2；
C2D2: circular arc D2E2 tangent line and O2C2 angle is 20 °, and D2 is point of contact, and C2 is met at pitch circle；
B2C2: using O2 as the center of circle, D2o is that diameter makees an addendum circle arc, and the center of circle is made since C2 point by radius of r on pitch circle
One transition arc and addendum circle arc are tangential on B2 point, obtain line segment B2C2；
A2B2: using O2 as the center of circle, D2o is that diameter makees an addendum circle arc, determines B2 point by B2C2 line segment, A2 point is by line segment below
H2A2 is determined；
F2G2: the line segment with male rotor F1 point conjugation is determined that F1 point is overlapped with F2 point by F1 point, and G2 point is F1 point as sun turns
Sub- pitch circle rolls the final on trajectory to be formed, and O4G2 and O2G2 line form right-angle relationship；
G2H2:, which connecting O2G2, and extends to female rotor pitch circle meets at H2 point, forms line segment G2H2；
H2A2: using O2 as the center of circle, D2o is that diameter makees an addendum circle arc, and the center of circle is made since H2 point by radius of r on pitch circle
Also thus one transition arc and addendum circle arc are tangential on A2 point, obtain line segment H2A2. A2 point once determination, while A2B2 line segment
It determines；
Male rotor molded line includes:
E1F1: it is determined by female rotor E2F2, is overlapped with E2F2；
D1E1: it is conjugated the line segment to be formed with D2E2 on female rotor, is determined by D2E2；
C1D1: it is conjugated the line segment to be formed with female rotor C2D2, is determined by C2D2；
B1C1: it is conjugated the line segment to be formed with female rotor B2C2, is determined by B2C2；
A1B1: it is conjugated the line segment to be formed with female rotor B2A2 line segment, is determined by B2A2；
F1G1: male rotor is motionless, and female rotor pitch circle rolls the one section of track marked by G2 point, the line segment with G2 point conjugation；
G1H1: it is conjugated the line segment to be formed with female rotor G2H2 line segment, is determined by G2H2；
H1A1: it is conjugated the line segment to be formed with female rotor H2A2, is determined by H2A2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910706149.4A CN110374871A (en) | 2019-08-01 | 2019-08-01 | A kind of oil-free double-screw compressor molded lines of rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910706149.4A CN110374871A (en) | 2019-08-01 | 2019-08-01 | A kind of oil-free double-screw compressor molded lines of rotor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110374871A true CN110374871A (en) | 2019-10-25 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910706149.4A Pending CN110374871A (en) | 2019-08-01 | 2019-08-01 | A kind of oil-free double-screw compressor molded lines of rotor |
Country Status (1)
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| CN (1) | CN110374871A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109824A (en) * | 2021-11-25 | 2022-03-01 | 江南大学 | Double-screw rotor profile comprehensive performance judgment and optimal design method |
| CN114876796A (en) * | 2022-06-14 | 2022-08-09 | 爱景节能科技（上海）有限公司 | Novel double-screw compressor rotor profile |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4140445A (en) * | 1974-03-06 | 1979-02-20 | Svenka Rotor Haskiner Aktiebolag | Screw-rotor machine with straight flank sections |
| JPS5759092A (en) * | 1980-09-26 | 1982-04-09 | Kobe Steel Ltd | Screw rotor for screw compressor or the like |
| JPS61268891A (en) * | 1985-05-23 | 1986-11-28 | Kobe Steel Ltd | Screw rotor for screw compressor and the like |
| 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 |
-
2019
- 2019-08-01 CN CN201910706149.4A patent/CN110374871A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4140445A (en) * | 1974-03-06 | 1979-02-20 | Svenka Rotor Haskiner Aktiebolag | Screw-rotor machine with straight flank sections |
| JPS5759092A (en) * | 1980-09-26 | 1982-04-09 | Kobe Steel Ltd | Screw rotor for screw compressor or the like |
| JPS61268891A (en) * | 1985-05-23 | 1986-11-28 | Kobe Steel Ltd | Screw rotor for screw compressor and the like |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| 中国标准出版社全国压缩机标准化技术委员会编: "《中国机械工业标准汇编 压缩机卷 下》", 30 June 2004 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114109824A (en) * | 2021-11-25 | 2022-03-01 | 江南大学 | Double-screw rotor profile comprehensive performance judgment and optimal design method |
| CN114109824B (en) * | 2021-11-25 | 2023-08-15 | 江南大学 | Double-screw rotor molded line comprehensive performance judgment and optimal design method |
| CN114876796A (en) * | 2022-06-14 | 2022-08-09 | 爱景节能科技（上海）有限公司 | Novel double-screw compressor rotor profile |
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