CN208858411U - The flute profile of high pressure ratio High Pressure Difference twin-screw expander rotor - Google Patents
The flute profile of high pressure ratio High Pressure Difference twin-screw expander rotor Download PDFInfo
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- CN208858411U CN208858411U CN201821526002.4U CN201821526002U CN208858411U CN 208858411 U CN208858411 U CN 208858411U CN 201821526002 U CN201821526002 U CN 201821526002U CN 208858411 U CN208858411 U CN 208858411U
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Abstract
The utility model discloses the flute profiles of high pressure ratio High Pressure Difference twin-screw expander rotor, twin-screw expander includes female rotor and male rotor, each flute profile of the end face of female rotor is smoothly connected by seven sections of curve head and the tail, each flute profile of the end face of male rotor is smoothly connected by seven sections of curve head and the tail, in which: the tooth curve of each flute profile of female rotor end face includes circular arc line, Rational B Spline Curve, Rational B-splines envelope and oval camber line；The tooth curve of each flute profile of male rotor end face includes arc envelope line, Rational B Spline Curve, Rational B-splines envelope and elliptic arc envelope.After adopting the above scheme, since male rotor and female rotor can be made to realize optimal engagement during the work time, adjacent two sections of compositions tooth curve smoothly transits at tie point, it can bear high pressure ratio and temperature, contact line is shorter and leakage triangle is relatively small, molded line is at expanding machine thermodynamic property that is streamlined, having had, to improve the working efficiency of twin-screw expander.
Description
Technical field
The utility model relates to the rotor end-face flute profiles of screw expander.
Background technique
Twin-screw expander has broad application prospects in energy regenerating field, and molded lines of rotor is its design, exploitation
Basis.Molded lines of rotor needs to meet engagement requirement first, and it is short that the contact line that secondly molded lines of rotor is formed need to meet continuous and length
It is required that the leakage triangle area that besides molded lines of rotor is formed is small as far as possible, to reduce gas leakage, furthermore molded lines of rotor is also
Lesser enclosed volume should be formed.The rotor end-face flute profile of twin-screw expander is usually made of the connection of multistage curve, flute profile knot
Structure is more complicated.Since twin-screw expander is to reach the sealing between rotor by path of contact, it is therefore desirable to become in rotor stress
These aspects of the meshing characteristic of shape, expanded by heating and molded lines of rotor are studied, and based on this, design new and effective turn
Subtype line, to improve the working efficiency of twin-screw expander.
Summary of the invention
The purpose of this utility model is: combining with geometrograph that develop a kind of novel double-screw swollen using flank profil method
The end face tooth type of swollen machine rotor, the twin-screw expander with this flute profile, since male rotor and female rotor can be made worked
Optimal engagement is realized in journey, adjacent two sections of compositions tooth curve smoothly transits at tie point, can bear high pressure ratio and temperature, connect
It is shorter relatively small with leakage triangle to touch line, molded line is at expanding machine thermodynamic property that is streamlined, having had, to improve double
The working efficiency of screw expander, and precision is improved in process, extend the service life of cutter.
In order to solve the above technical problems, technical solution adopted in the utility model is:
The flute profile of high pressure ratio High Pressure Difference twin-screw expander rotor, twin-screw expander include female rotor and male rotor, yin
Each flute profile of the end face of rotor is smoothly connected by seven sections of curve head and the tail, and each flute profile of the end face of male rotor is by seven sections of curve head
Tail is smoothly connected, in which: the tooth curve of each flute profile of female rotor end face includes circular arc line, Rational B Spline Curve, reasonable B
Batten envelope and oval camber line；The tooth curve of each flute profile of male rotor end face include arc envelope line, Rational B Spline Curve,
Rational B-splines envelope and elliptic arc envelope.
The molded lines of rotor of the utility model has at least the following advantages compared to other molded line and feature:
1, since the yin, yang rotor of the utility model uses proper tooth depth radius, flute profile area utilization factor
Reach 48%；
2, since the Profile Design of yin, yang rotor is at streamlined, the disturbance resistance of air-flow is reduced, loss is reduced, dropped
Low noise, improves the operational efficiency of rotor, in the case where high temperature and stress, thermal deformation and bending deformation are all smaller；
3, the utility model is combined by Rational B Spline Curve and conic section, is on the one hand made smooth between constituent curve
Connection, on the other hand makes contact line short, and engagement is steady, and good airproof performance is high-efficient, without cusp on molded line, is convenient for grinding
And detection, cleanliness is good, and noise is low；
4, yin, yang rotor uses bilateral molded line, and root diameter is easy to adjust, and Torque distribution is reasonable between rotor, with small vibration；
5, the diameter of yin, yang rotor is not much different, and rotor rigidity is close, and bearing capacity is high, be suitable for pressure difference and pressure ratio compared with
Big operating condition.
Detailed description of the invention
Fig. 1 be the utility model female rotor and male rotor a kind of example intermeshing when schematic diagram.
Fig. 2 is the flute profile line schematic diagram of an example of the utility model female rotor.
Fig. 3 is the flute profile line schematic diagram of an example of the utility model male rotor.
In figure: O1 is the axle center of male rotor, and O2 is the axle center of female rotor；R1 is the radius of the outside circle of male rotor, and R2 is
The radius of female rotor outside circle；Mj is the pitch circle of male rotor, and R1j is the pitch radius of male rotor；Fj is the pitch circle of female rotor,
R2j is the pitch radius of female rotor；A is the center of two rotors away from A=R1j+R2j；O3 is the center of circle of female rotor circular arc A2B2, R3
It is the radius of female rotor circular arc A2B2；O4 is the center of female rotor elliptic arc D2E2, and a is the major semiaxis of elliptic arc D2E2, and b is ellipse
The semi-minor axis of circular arc D2E2；O5 is the center of circle of female rotor circular arc E2F2, and R5 is the radius of female rotor circular arc E2F2；O6 is that yin turns
The center of circle of sub- circular arc G1H1, R6 are the radiuses of female rotor circular arc G2H2.
Specific embodiment
In the following with reference to the drawings and specific embodiments to the tooth of the utility model high pressure ratio High Pressure Difference twin-screw expander rotor
Type is described in detail.
It please refers to Fig.1 to Fig.3.The rotor flute profile of the female rotor F and male rotor M of the twin-screw expander of the utility model is in
Bilateral asymmetrical type, and the number of teeth on female rotor F is more than the number of teeth on male rotor M.In the present embodiment, male rotor M and female rotor F
Gear ratio be 7:8.
According to the flute profile of the high pressure ratio High Pressure Difference twin-screw expander rotor of an embodiment of the present invention, the twin-screw
Expanding machine includes female rotor F and male rotor M.Each flute profile of the end face of female rotor F is smoothly connected by seven sections of curve head and the tail, sun
Each flute profile of the end face of rotor M is smoothly connected by seven sections of curve head and the tail, in which: the tooth curve of each flute profile of female rotor end face
Including circular arc line, Rational B Spline Curve, Rational B-splines envelope and oval camber line；The tooth curve of each flute profile of male rotor end face
Including arc envelope line, Rational B Spline Curve, Rational B-splines envelope and elliptic arc envelope.In the present embodiment: female rotor
The tooth curve of each flute profile includes that sequence is smoothly connected: circular arc A2B2, Rational B Spline Curve B2C2, Rational B-splines envelope
C2D2, elliptic arc D2E2, circular arc E2F2, Rational B Spline Curve F2G2 and circular arc G2H2；The tooth curve packet of each flute profile of male rotor
Include what sequence was smoothly connected: arc envelope line A1B1, Rational B-splines envelope B1C1, Rational B Spline Curve C1D1, elliptic arc
Envelope D1E1, arc envelope line E1F1, Rational B-splines envelope F1G1 and arc envelope line G1H1.
It is n1 times of female rotor pitch radius that the circular arc A2B2 of female rotor, which is by the center of circle, radius of the O3 inside female rotor pitch circle,
One section of circular arc line；N1 is greater than the 0.05, positive number less than or equal to 0.1；Circular arc A2B2 is adjacent with the female rotor at starting point A2
The terminal of another tooth is smoothly connected, and is smoothly connected at terminal B2 with Rational B Spline Curve B2C2；The arc envelope line of male rotor
A1B1 is by male rotor pitch circle when rolling along female rotor pitch circle, and opposite female rotor circular arc A2B2 movement is formed by track
One section of arc envelope line.
The Rational B Spline Curve B2C2 of female rotor is smoothly connected at starting point B2 with circular arc A2B2, at terminal C2 with have
Reason B-spline envelope C2D2 is smoothly connected；The Rational B-splines envelope B1C1 of male rotor is by male rotor pitch circle along female rotor
When rolling on pitch circle, opposite female rotor Rational B Spline Curve B2C2 movement is formed by one section of Rational B-splines envelope of track
Line.
The Rational B-splines envelope C2D2 of female rotor is by female rotor pitch circle when rolling along male rotor pitch circle, relatively
Male rotor Rational B Spline Curve C1D1 moves one section of Rational B-splines envelope for being formed by track；The reasonable B sample of male rotor
Curve C1D1 is smoothly connected at starting point C1 with Rational B-splines envelope B1C1, at terminal D1 with elliptic arc envelope
D1E1 is smoothly connected.
The elliptic arc D2E2 of female rotor be centered on the O4 inside female rotor pitch circle, long axis be n2 times of female rotor pitch circle half
Diameter, one section of elliptic arc that short axle is n3 times of female rotor pitch radius；N2 is greater than the 0.3, positive number less than or equal to 0.5, and n3 is big
In the 0.2, positive number less than or equal to 0.3；Elliptic arc D2E2 is smoothly connected at starting point D2 with Rational B-splines envelope C2D2,
It is smoothly connected at terminal E2 with circular arc E2F2；The elliptic arc envelope D1E1 of male rotor is by male rotor pitch circle along female rotor section
When rolling on circle, opposite female rotor elliptic arc D2E2 movement is formed by one section of elliptic arc envelope of track.
It is n4 times of female rotor pitch radius that the circular arc E2F2 of female rotor, which is by the center of circle, radius of the O5 inside female rotor pitch circle,
One section of circular arc line, n4 be greater than the 0.3, positive number less than or equal to 0.5；Circular arc E2F2 is smooth with elliptic arc D2E2 at starting point E2
Connection, is smoothly connected at terminal F2 with Rational B Spline Curve F2G2；The arc envelope line E1F1 of male rotor is by male rotor section
For circle when rolling along female rotor pitch circle, opposite female rotor circular arc E2F2 movement is formed by one section of arc envelope line of track.
The Rational B Spline Curve F2G2 of female rotor is smoothly connected at starting point F2 with circular arc E2F2, at terminal G2 and round
Arc G2H2 is smoothly connected；The Rational B-splines envelope F1G1 of male rotor is to be rolled by male rotor pitch circle along female rotor pitch circle
When, opposite female rotor Rational B Spline Curve F2G2 movement is formed by one section of Rational B-splines envelope of track.
It is n5 times of female rotor pitch radius that the circular arc G2H2 of female rotor, which is by the center of circle, radius of the O6 inside female rotor pitch circle,
One section of circular arc line, n5 be greater than the 0.1, positive number less than or equal to 0.2；Circular arc G2H2 is at starting point G2 and Rational B Spline Curve
F2G2 is smoothly connected, and the starting point of another tooth adjacent with the female rotor is smoothly connected at terminal H2.The arc envelope line of male rotor
G1H1 is by male rotor pitch circle when rolling along female rotor pitch circle, and opposite female rotor circular arc G2H2 movement is formed by track
One section of arc envelope line.
Using the flute profile according to the twin-screw expander rotor of the utility model embodiment, twin-screw expander can be improved
The pressure difference born of rotor, reduce enclosed volume and the between cog leakage of rotor, increase the area utilization factor of flute profile, improve
The working efficiency of twin-screw expander.
Claims (6)
1. the flute profile of high pressure ratio High Pressure Difference twin-screw expander rotor, the twin-screw expander includes female rotor and male rotor,
It is characterized in that, each flute profile of the end face of the female rotor is smoothly connected by seven sections of curve head and the tail, the end of the male rotor
Each flute profile in face is smoothly connected by seven sections of curves head and the tail, in which: the tooth curve of each flute profile of the female rotor end face includes
Circular arc line, Rational B Spline Curve, Rational B-splines envelope and oval camber line；The tooth curve of each flute profile of the male rotor end face
Including arc envelope line, Rational B Spline Curve, Rational B-splines envelope and elliptic arc envelope.
2. the flute profile of high pressure ratio High Pressure Difference twin-screw expander rotor according to claim 1, which is characterized in that female rotor
The tooth curve of each flute profile includes that sequence is smoothly connected: circular arc A2B2, Rational B Spline Curve B2C2, Rational B-splines envelope
C2D2, elliptic arc D2E2, circular arc E2F2, Rational B Spline Curve F2G2 and circular arc G2H2；
The tooth curve of each flute profile of male rotor includes that sequence is smoothly connected: arc envelope line A1B1, Rational B-splines envelope
B1C1, Rational B Spline Curve C1D1, elliptic arc envelope D1E1, arc envelope line E1F1, Rational B-splines envelope F1G1 with
And arc envelope line G1H1.
3. the flute profile of high pressure ratio High Pressure Difference twin-screw expander rotor according to claim 2, which is characterized in that the yin
In the tooth curve of each flute profile of rotor:
Circular arc A2B2 is using the O3 inside female rotor pitch circle as one section of circular arc that the center of circle, radius are n1 times of female rotor pitch radius
Line；N1 is greater than the 0.05, positive number less than or equal to 0.1；The end of circular arc A2B2 another tooth adjacent with the female rotor at starting point A2
Point is smoothly connected, and is smoothly connected at terminal B2 with Rational B Spline Curve B2C2；
Rational B Spline Curve B2C2 is smoothly connected at starting point B2 with circular arc A2B2, at terminal C2 with Rational B-splines envelope
C2D2 is smoothly connected；
Rational B-splines envelope C2D2 is the opposite reasonable B sample of male rotor by female rotor pitch circle when rolling along male rotor pitch circle
Curve C1D1 movement is formed by one section of Rational B-splines envelope of track；
Elliptic arc D2E2 be centered on the O4 inside female rotor pitch circle, long axis be n2 times of female rotor pitch radius, short axle n3
One section of elliptic arc of times female rotor pitch radius；N2 is greater than the 0.3, positive number less than or equal to 0.5, and n3 is greater than 0.2, is less than etc.
In 0.3 positive number；Elliptic arc D2E2 is smoothly connected at starting point D2 with Rational B-splines envelope C2D2, at terminal E2 and round
Arc E2F2 is smoothly connected；
Circular arc E2F2 is using the O5 inside female rotor pitch circle as one section of circular arc that the center of circle, radius are n4 times of female rotor pitch radius
Line, n4 are greater than the 0.3, positive number less than or equal to 0.5；Circular arc E2F2 is smoothly connected at starting point E2 with elliptic arc D2E2, at end
It is smoothly connected at point F2 with Rational B Spline Curve F2G2；
Rational B Spline Curve F2G2 is smoothly connected at starting point F2 with circular arc E2F2, at terminal G2 with the smooth company of circular arc G2H2
It connects；
Circular arc G2H2 is using the O6 inside female rotor pitch circle as one section of circular arc that the center of circle, radius are n5 times of female rotor pitch radius
Line, n5 are greater than the 0.1, positive number less than or equal to 0.2；Circular arc G2H2 at starting point G2 with the smooth company of Rational B Spline Curve F2G2
It connects, the starting point of another tooth adjacent with the female rotor is smoothly connected at terminal H2.
4. the flute profile of high pressure ratio High Pressure Difference twin-screw expander rotor according to claim 2 or 3, which is characterized in that institute
In the tooth curve for stating each flute profile of male rotor:
Arc envelope line A1B1 is by male rotor pitch circle when rolling along female rotor pitch circle, and opposite female rotor circular arc A2B2 is moved
It is formed by one section of arc envelope line of track；
Rational B-splines envelope B1C1 is the opposite reasonable B sample of female rotor by male rotor pitch circle when rolling along female rotor pitch circle
Curve B2C2 movement is formed by one section of Rational B-splines envelope of track；
Rational B Spline Curve C1D1 is smoothly connected at starting point C1 with Rational B-splines envelope B1C1, at terminal D1 and oval
Arc envelope D1E1 is smoothly connected；
Elliptic arc envelope D1E1 is the opposite female rotor elliptic arc D2E2 by male rotor pitch circle when rolling along female rotor pitch circle
Movement is formed by one section of elliptic arc envelope of track；
Arc envelope line E1F1 is by male rotor pitch circle when rolling along female rotor pitch circle, and opposite female rotor circular arc E2F2 is moved
It is formed by one section of arc envelope line of track；
Rational B-splines envelope F1G1 is the opposite reasonable B sample of female rotor by male rotor pitch circle when rolling along female rotor pitch circle
Curve F2G2 movement is formed by one section of Rational B-splines envelope of track；
Arc envelope line G1H1 is by male rotor pitch circle when rolling along female rotor pitch circle, and opposite female rotor circular arc G2H2 is moved
It is formed by one section of arc envelope line of track.
5. the flute profile of high pressure ratio High Pressure Difference twin-screw expander rotor according to claim 1, which is characterized in that described
The rotor flute profile of female rotor and male rotor is in asymmetrical type, and the number of teeth on female rotor is more than the number of teeth on male rotor.
6. the flute profile of high pressure ratio High Pressure Difference twin-screw expander rotor according to claim 1, which is characterized in that the sun
The gear ratio of rotor and female rotor is 7:8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821526002.4U CN208858411U (en) | 2018-09-18 | 2018-09-18 | The flute profile of high pressure ratio High Pressure Difference twin-screw expander rotor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821526002.4U CN208858411U (en) | 2018-09-18 | 2018-09-18 | The flute profile of high pressure ratio High Pressure Difference twin-screw expander rotor |
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| Publication Number | Publication Date |
|---|---|
| CN208858411U true CN208858411U (en) | 2019-05-14 |
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ID=66418259
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821526002.4U Active CN208858411U (en) | 2018-09-18 | 2018-09-18 | The flute profile of high pressure ratio High Pressure Difference twin-screw expander rotor |
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| Country | Link |
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| CN (1) | CN208858411U (en) |
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2018
- 2018-09-18 CN CN201821526002.4U patent/CN208858411U/en active Active
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