CN105156323B - A kind of cold pressing machine rotor - Google Patents
A kind of cold pressing machine rotor Download PDFInfo
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- CN105156323B CN105156323B CN201510575147.8A CN201510575147A CN105156323B CN 105156323 B CN105156323 B CN 105156323B CN 201510575147 A CN201510575147 A CN 201510575147A CN 105156323 B CN105156323 B CN 105156323B
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Abstract
The invention discloses a kind of cold pressing machine rotors, including the first rotor, the second rotor, tooth form caused by each rotor is made of Modified cycloid, cycloid, tooth root circular arc, pseudo- archimedes line, pseudo- archimedes line conjugation envelope, addendum circle arc and above-mentioned all 6 sections of curves about origin symmetry curve, the present invention is formed by cold press rotor tooth form, two rotor shapes are identical, rotor is about origin symmetry, end face barycenter is located on origin, and Modified cycloid improves the stability and reliability of rotor.Cold press caused by the present invention, can improve the stability of screw rod cold press, and reduce the processing cost of rotor.
Description
Technical field
The present invention relates to cold press field, specifically a kind of cold pressing machine rotor.
Background technology
Cold press is the mechanical equipment that steam obtains environment under low pressure in a kind of aspiration container.Helium is subcooled, refers to less than 4.2K's
Liquid helium generally depressurizes liquid helium vessel using normal temperature compressed machine or cold press and obtains.Normal temperature compressed machine is by the cold helium vapor of suction
Enter room temperature pipeline after heat exchanger heats, and the gas of cold press suction participates in cryogenic heat exchanger still in cryogenic system
Cooling and sub-cooled gas supply, therefore heat exchange structure needed for normal temperature compressed machine is complicated；Meanwhile for normal temperature compressed
Machine, since evaporation helium enters room temperature heat exchanger, Vigorous gas expansion under low temperature environment, the work for increasing compressor is born
Lotus, therefore the flow of normal temperature compressed machine and volume are all bigger, by taking 200W@3.5K cold compressors as an example, use is normal temperature compressed
The flow of machine is about 600m3/ h, and it is only 6.53m to use the flow of cold press3The energy consumption of/h, compressor motor will substantially reduce,
It can be with the effectively save energy.Therefore, supercooling helium is obtained using cold press, the utilization rate and economic performance of system cold will be improved,
And the flow and size of compressor are greatly reduced, it is effectively saved space cost.
In current existing data, what is analyzed mostly is the large-scale low-temperature refrigeration system of 2K or less kW ranks, is generally used
Centrifugal cold press, however for kW ranks hereinafter, the supercooling helium of 3.5K or so is produced, the operating mode of centrifuge is no longer stablized,
It is easy to happen surge, and pressure ratio is relatively low, needs plural serial stage.It compares, screw rod mechanism is adaptable strong, dynamic balance performance
It is good, have the characteristics that force gas transmission, can reach 10 even higher by the design of vent ports adjusting pressure ratio, pressure ratio,
The plural serial stage of centrifuge is avoided, and screw machine can work normally in wide range of flow, improve cold press
Stability.However, in the document that can be consulted at present, still without there is the cold press using screw.
Screw rod cold press is essentially a kind of screw vacuum pump, and current existing screw vacuum pump is mostly single
Head dummy line, dynamic balance performance is not good enough, and the vibration of rotor need to be avoided using the method for beating balance hole on screw rod.For cold press
For, the temperature of extremely low liquid helium region and very high motor speed, punching is unsuitable on rotor, it is therefore desirable to be invented
It is a kind of total conjugated and can to realize the screw rotor molded line of self-balancing.
Meanwhile in existing screw rotor molded line, contain cycloid section mostly, the intersection point of cycloid section and addendum circle arc is one
A very sharp point, it is all easy to wear no matter in processing, transport and actual moving process, and this point while and pendulum
The generation point of line, has important role for the sealing performance of rotor.
Invention content
It is of the existing technology to solve the problems, such as the object of the present invention is to provide a kind of cold pressing machine rotor.
In order to achieve the above object, the technical solution adopted in the present invention is：
A kind of cold pressing machine rotor, it is characterised in that：Including the first rotor and the second rotor, the first rotor molded line and second turn
Subtype line is identical and oppositely oriented, and the first rotor and the second molded lines of rotor total conjugated, and the molded line of each rotor is respectively by repairing
Positive cycloid, cycloid, tooth root circular arc, pseudo- archimedes line, pseudo- archimedes line are conjugated envelope, addendum circle arc totally six sections of curves,
And symmetrical curve successively end to end composition of the above-mentioned six sections of curves about same origin.
A kind of cold pressing machine rotor, it is characterised in that：The first rotor and the second rotor are respectively provided with symmetrical structure simultaneously
Self-balancing can be achieved.
Molded line total conjugated of the present invention, cold press rotor operation stable conditions using the present invention, adaptable, Yi Duizhuan
Sub- profile is identical, oppositely oriented, and it is low to reduce processing cost.
The invention has the advantages that：
1) rotor centroid that molded line is formed is located in rotary shaft, is not necessarily to dynamic balancing hole.
2) molded line has cycloid amendment, and in actual operation, reliability is high for rotor.
3) the first rotor and bitrochanteric molded line total conjugated will not take off tooth in operation, will not interfere, sealing
It is functional.
4) the screw rod cold press that molded line rotor generates, is compared to centrifugation cold press, has very strong adaptability, Neng Gou
Steady operation under wide working condition.
Description of the drawings
Fig. 1 is the profile of cold pressing machine rotor of the present invention；
Fig. 2 is cold pressing machine rotor three-dimensional model diagram of the present invention.
Specific implementation mode
A kind of cold pressing machine rotor, including the first rotor and the second rotor, the first rotor molded line are identical as the second molded lines of rotor
And it is oppositely oriented, and the first rotor and the second molded lines of rotor total conjugated, the molded line of each rotor is respectively by Modified cycloid, pendulum
Line, tooth root circular arc, pseudo- archimedes line, pseudo- archimedes line are conjugated envelope, addendum circle arc totally six sections of curves and above-mentioned six
Symmetrical curve successively end to end composition of the section curve about same origin.The first rotor and the second rotor are respectively provided with symmetrical junction
Structure simultaneously can realize self-balancing.
As shown in Figure 1, the first rotor group become Modified cycloid ab, cycloid bc, tooth root circular arc cd, pseudo- archimedes line de,
Pseudo- archimedes line conjugation envelope ef, addendum circle arc fg and the respectively Modified cycloid with above-mentioned curve about origin symmetry
Gh, cycloid hi, tooth root circular arc ij, pseudo- archimedes line jk, pseudo- archimedes line conjugation envelope kl, addendum circle arc la compositions.
Second molded lines of rotor is identical as the first rotor molded line, the second rotor-position shown in Fig. 1, is to rotate the first rotor molded line counterclockwiseThe second molded lines of rotor is can be obtained, whereinFor the polar angle range of Modified cycloid ab respective coordinates origins, each
Rotor is all symmetrical about its correspondence center of circle, ensure that the barycenter of rotor in rotor shaft, and a pair of of rotor is at a fully engaged.
The first rotor molded line composition is as follows：
Ab sections：Point is generated by cycloid of b points, O1b is cycloidal pendulum diameter, and the cycloid of generation is met at by the great circle in the center of circle of O1
A points, it is 1.7 °~2.2 ° desirable by the polar angle range in the center of circle of O1；
Bc sections：Point is generated by cycloid of a points, O1a is cycloidal pendulum diameter, and the cycloid of generation is met at by the roundlet in the center of circle of O1
C points are identical as ab sections as the polar angle range in the center of circle using O1；
Cd sections：Using O1 as one section of tooth root circular arc of the roundlet in the center of circle, starting point and terminal are respectively c points and d points, are with O1
The polar angle range in the center of circle is 15 °~18 ° desirable；
De sections：One section is with cd sections of tangent pseudo- Archimedes spirals, forming method：The A Ji generated with d points and e points
On the basis of Mead helical, it is multiplied by cosine function and obtains, it is 60 °~75 ° desirable by the polar angle range in the center of circle of O1；
Ef sections：The conjugation envelope that de sections of pseudo- archimedes lines are formed is identical as de sections as the polar angle range in the center of circle using O1；
Fg sections：One section using O1 as the addendum circle arc in the great circle in the center of circle, starting point and terminal are respectively f points and g points, with O1
It is identical as cd sections for the polar angle range in the center of circle；
Gh sections, hi sections, ij sections, jk sections, kl sections, la sections respectively with ab sections, bc sections, cd sections, de sections, ef sections, fg sections about
O1 is symmetrical；
Wherein, pseudo- Archimedes spiral is conjugated envelope with pseudo- Archimedes spiral and is connected on e points on pitch circle, and in e points
It is tangent.
Second rotor is identical as the first rotor molded line, and rotor is oppositely oriented.
The equation in coordinates of Modified cycloid ab is：
Wherein, xabFor ab sections of X-coordinate, yabFor ab sections of Y coordinates, L is the pendulum diameter of Modified cycloid, t1It is corresponded to for Modified cycloid ab
The angle that its center of circle turns over, A are the centre-to-centre spacing of a pair of of rotor, i.e. the sum of addendum circle arc and fillet radius,It is put to correct
The polar angle range of line ab respective coordinates origins, above-mentioned formula are about t1For the equation group of variable.
The equation in coordinates of cycloid bc is obtained by down：
Wherein, xbcFor the X-coordinate of cycloid section bc, ybcFor the Y coordinate of cycloid section bc, L2For the pendulum diameter of cycloid section bc, t2For
Cycloid section bc corresponds to the angle that the center of circle turns over.
The equation in coordinates of tooth root circular arc cd is obtained by down：
Wherein, xcdFor the X-coordinate of tooth root circular arc cd, ycdFor the Y coordinate of tooth root circular arc cd, d is using O1 as the tooth root in the center of circle
Diameter of a circle, t3The angle that the center of circle turns over is corresponded to for tooth root circular arc cd.
The equation in coordinates of pseudo- archimedes line de is obtained by down：
Wherein, xdeFor the X-coordinate of pseudo- archimedes line de, ydeFor the Y coordinate of pseudo- archimedes line de, r is pitch circle half
Diameter, the i.e. half of centre-to-centre spacing, 2 times that p0 is pseudo- archimedes line about the polar angle of center of circle O1, t4It is corresponded to for pseudo- archimedes line
The angle that the center of circle turns over.
The equation in coordinates of pseudo- ef sections of envelope of archimedes line conjugation is obtained by down：
Wherein, xefThe X-coordinate of envelope ef, y are conjugated for pseudo- archimedes lineefIt is conjugated envelope for pseudo- archimedes line
The Y coordinate of ef, φ1For molded lines of rotor location parameter (intermediate parameter), t5It is conjugated envelope for pseudo- archimedes line and corresponds to center of circle rotation
The angle turned.Intermediate parameter φ can be eliminated by above-mentioned equation1, obtain xef、yefAbout parameter t5Equation in coordinates, as pseudo- Ah
Base Mead line is conjugated envelope ef equations.
The equation in coordinates of addendum circle arc fg is as follows：
Wherein xfgFor fg sections of X-coordinate, yfgFor fg sections of Y coordinates, D is using O1 as the tip diameter in the center of circle, t6For outside circle
Arc corresponds to the angle that its center of circle is turned over.
Gh sections, hi sections, ij sections, jk sections, kl sections, la sections respectively with ab sections, bc sections, cd sections, de sections, ef sections, fg sections about
O1 is symmetrical.
Second rotor-position shown in Fig. 1 is to rotate the first rotor molded line counterclockwiseIt can be obtained the second rotor
Molded line.
X-coordinate, Y coordinate are the coordinate of rectangular coordinate system above.
Embodiment
Each section of curved dies provided by the invention are as follows：
Take D=130mm, d=66mm, p0=0.8 π, L=0.475D, L2=0.5D.
The equation in coordinates of Modified cycloid ab is：
0≤t1≤38.3°
Cycloid bc equation in coordinates is obtained by down：
38.3°≤t2≤40.6°
The equation in coordinates of tooth root circular arc cd is obtained by down：
90°≤t3≤105.8°
The equation in coordinates of pseudo- archimedes line de is obtained by down：
105.8°≤t4≤177.8°
The equation in coordinates of pseudo- ef sections of envelope of archimedes line conjugation is obtained by down：
Intermediate parameter φ can be eliminated by above-mentioned equation1, obtain xef、yefAbout parameter t5Equation in coordinates, as pseudo- Ah
Base Mead line is conjugated envelope ef equations.
The equation in coordinates of addendum circle arc fg is as follows：
249.8°≤t6≤265.6°
Gh sections, hi sections, ij sections, jk sections, kl sections, la sections respectively with ab sections, bc sections, cd sections, de sections, ef sections, fg sections about
O1 is symmetrical.
Second rotor-position shown in Fig. 1 is that 4.4 ° of rotation can be obtained the second rotor-type counterclockwise by the first rotor molded line
Line.
Fig. 2 is the threedimensional model for the cold pressing machine rotor that molded line of the present invention generates.
Claims (1)
1. a kind of cold pressing machine rotor, it is characterised in that：Including the first rotor and the second rotor, the first rotor molded line and the second rotor
Molded line is identical and oppositely oriented, and the first rotor and the second molded lines of rotor total conjugated, and the molded line of each rotor is respectively by correcting
Cycloid, cycloid, tooth root circular arc, pseudo- archimedes line, pseudo- archimedes line are conjugated envelope, addendum circle arc totally six sections of curves, with
And symmetrical curve successively end to end composition of the above-mentioned six sections of curves about same origin；
Specific the first rotor group becomes Modified cycloid ab, cycloid bc, tooth root circular arc cd, pseudo- archimedes line de, pseudo- Archimedes
Line is conjugated envelope ef, addendum circle arc fg and respectively the Modified cycloid gh, cycloid hi, tooth with above-mentioned curve about origin symmetry
Root circular arc ij, pseudo- archimedes line jk, pseudo- archimedes line conjugation envelope kl, addendum circle arc la compositions；
The first rotor molded line composition is as follows：
Ab sections：Generate point using b points as cycloid, O1b is cycloidal pendulum diameter, the cycloid of generation with by the great circle in the center of circle of O1 meet at a points,
It is 1.7 °~2.2 ° desirable by the polar angle range in the center of circle of O1；
Bc sections：Generate point using a points as cycloid, O1a is cycloidal pendulum diameter, the cycloid of generation with by the roundlet in the center of circle of O1 meet at c points,
It is identical as ab sections as the polar angle range in the center of circle using O1；
Cd sections：Using O1 as one section of tooth root circular arc of the roundlet in the center of circle, starting point and terminal are respectively c points and d points, using O1 as the center of circle
Desirable 15 °~18 ° of polar angle range；
De sections：One section is with cd sections of tangent pseudo- Archimedes spirals, forming method：The Archimedes generated with d points and e points
On the basis of helical, it is multiplied by cosine function and obtains, it is 60 °~75 ° desirable by the polar angle range in the center of circle of O1；
Ef sections：The conjugation envelope that de sections of pseudo- archimedes lines are formed is identical as de sections as the polar angle range in the center of circle using O1；
Fg sections：One section using O1 as the addendum circle arc in the great circle in the center of circle, starting point and terminal are respectively f points and g points, are circle with O1
The polar angle range of the heart is identical as cd sections；
Gh sections, hi sections, ij sections, jk sections, kl sections, la sections respectively with ab sections, bc sections, cd sections, de sections, ef sections, fg sections about O1 pairs
Claim；
Wherein, pseudo- Archimedes spiral is conjugated envelope with pseudo- Archimedes spiral and is connected on e points on pitch circle, and tangent in e points；
Second rotor is identical as the first rotor molded line, and rotor is oppositely oriented；
The equation in coordinates of Modified cycloid ab is：
Wherein, xabFor ab sections of X-coordinate, yabFor ab sections of Y coordinates, L is the pendulum diameter of Modified cycloid, t1Its circle is corresponded to for Modified cycloid ab
The angle that the heart turns over, A are the centre-to-centre spacing of a pair of of rotor, i.e. the sum of addendum circle arc and fillet radius,For Modified cycloid ab
The polar angle range of respective coordinates origin, above-mentioned formula are about t1For the equation group of variable；
The equation in coordinates of cycloid bc is obtained by down：
Wherein, xbcFor the X-coordinate of cycloid section bc, ybcFor the Y coordinate of cycloid section bc, L2For the pendulum diameter of cycloid section bc, t2For cycloid
Section bc corresponds to the angle that the center of circle turns over；
The equation in coordinates of tooth root circular arc cd is obtained by down：
Wherein, xcdFor the X-coordinate of tooth root circular arc cd, ycdFor the Y coordinate of tooth root circular arc cd, d is using O1 as the root circle in the center of circle
Diameter, t3The angle that the center of circle turns over is corresponded to for tooth root circular arc cd；
The equation in coordinates of pseudo- archimedes line de is obtained by down：
Wherein, xdeFor the X-coordinate of pseudo- archimedes line de, ydeFor the Y coordinate of pseudo- archimedes line de, r is pitch radius, i.e., in
The heart away from half, 2 times that p0 is pseudo- archimedes line about the polar angle of center of circle O1, t4The center of circle is corresponded to for pseudo- archimedes line to turn over
Angle；
The equation in coordinates of pseudo- ef sections of envelope of archimedes line conjugation is obtained by down：
Wherein, xefThe X-coordinate of envelope ef, y are conjugated for pseudo- archimedes lineefThe Y of envelope ef is conjugated for pseudo- archimedes line
Coordinate, φ1For molded lines of rotor location parameter (intermediate parameter), t5It is conjugated envelope for pseudo- archimedes line and corresponds to center of circle rotation
Angle；Intermediate parameter φ can be eliminated by above-mentioned equation1, obtain xef、yefAbout parameter t5Equation in coordinates, as puppet A Ji meter
Moral line is conjugated envelope ef equations；
The equation in coordinates of addendum circle arc fg is as follows：
Wherein xfgFor fg sections of X-coordinate, yfgFor fg sections of Y coordinates, D is using O1 as the tip diameter in the center of circle, t6For addendum circle arc pair
The angle for answering its center of circle to be turned over；
Gh sections, hi sections, ij sections, jk sections, kl sections, la sections respectively with ab sections, bc sections, cd sections, de sections, ef sections, fg sections about O1 pairs
Claim；
Second molded lines of rotor is identical as the first rotor molded line, is to rotate the first rotor molded line counterclockwiseIt can be obtained
Two molded lines of rotor, whereinFor the polar angle range of Modified cycloid ab respective coordinates origins, each rotor is about its correspondence circle
The heart is symmetrical, ensure that the barycenter of rotor in rotor shaft, and a pair of of rotor is at a fully engaged；
X-coordinate, Y coordinate are the coordinate of rectangular coordinate system above.
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106438358B (en) * | 2016-12-07 | 2018-06-05 | 中国石油大学(华东) | A kind of conical screw rotor of self-balancing |
| CN110360113B (en) * | 2019-07-18 | 2021-03-02 | 合肥工业大学 | Double-end symmetrical rotor profile based on single-end screw rotor profile design |
| CN111120328B (en) * | 2019-12-31 | 2020-10-27 | 中船重工(重庆)西南装备研究院有限公司 | Claw type pump rotor tooth form |
| CN111350665B (en) * | 2020-02-25 | 2022-02-18 | 宁波鲍斯能源装备股份有限公司 | Screw rotor set and hydrogen circulating pump with same |
| CN111828327B (en) * | 2020-07-15 | 2021-11-30 | 高秀峰 | Multi-tooth rotor compressor rotor molded line, multi-tooth rotor and compressor |
| CN111779676B (en) * | 2020-07-15 | 2021-11-19 | 西安交通大学 | Double-tooth rotor compressor rotor profile, double-tooth rotor and compressor |
| CN111794962B (en) * | 2020-07-15 | 2022-04-12 | 西安天荣工业技术有限公司 | Tooth-type rotor profile sharp point correction method and tooth-type rotor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2273787Y (en) * | 1996-01-12 | 1998-02-04 | 广东工业大学 | Teeth like screw stem |
| CN2622429Y (en) * | 2003-05-14 | 2004-06-30 | 黄工机械有限公司 | Double-threaded screw bolt tooth outline for double-screw bolt pump |
| JP2005163566A (en) * | 2003-12-01 | 2005-06-23 | Shigeyoshi Osada | Improvement of screw rotor tooth form |
| CN1246594C (en) * | 2003-12-10 | 2006-03-22 | 浙江大学 | Approximate sealed dual head screw |
| JP5353521B2 (en) * | 2009-07-22 | 2013-11-27 | 株式会社豊田自動織機 | Screw rotor |
| CN103062057B (en) * | 2013-01-06 | 2015-11-25 | 南通大学 | A kind of screw-type vacuum pump |
| CN104166376A (en) * | 2013-05-18 | 2014-11-26 | 刘希汉 | Compound interpolation method and system software thereof |
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Address after: 230001 no.181 Gucheng Road, shiyangang Township, Hefei City, Anhui Province Patentee after: INSTITUTE OF PLASMA PHYSICS, CHINESE ACADEMY OF SCIENCES Address before: 230031 Shushan Lake Road, Shushan District, Anhui, China, No. 350, No. Patentee before: INSTITUTE OF PLASMA PHYSICS, CHINESE ACADEMY OF SCIENCES |