CN104454541A - Novel nonsymmetrical double-screw profile, double-screw compressor and heat pump - Google Patents
Novel nonsymmetrical double-screw profile, double-screw compressor and heat pump Download PDFInfo
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- CN104454541A CN104454541A CN201410448876.2A CN201410448876A CN104454541A CN 104454541 A CN104454541 A CN 104454541A CN 201410448876 A CN201410448876 A CN 201410448876A CN 104454541 A CN104454541 A CN 104454541A
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- Prior art keywords
- screw
- tooth
- double
- arc section
- profile
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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
- 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
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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
- F04C2240/00—Components
- F04C2240/20—Rotors
-
- 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
- F04C2250/00—Geometry
- F04C2250/20—Geometry of the rotor
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
The invention discloses a novel nonsymmetrical double-screw profile, which is characterized by comprising a negative screw and a positive screw, wherein the negative screw and the positive screw are 6:5 multi-teeth screws; and the positive screw and the negative screw are in coagulated engagement. According to the prototype equation of the double-screw profile, the massive production and manufacturing can be accurately carried out so as to achieve high-precision spatial engagement, and an excellent energy efficiency ratio can be obtained. The double-screw profile has the effects that tooth-shaped curves formed by the double-screw profile are all arcs or arc envelope lines, contact lines are short, the engagement is stable, the sealing property is good, the efficiency is high, and the grinding and milling processing are convenient. The novel nonsymmetrical double-screw profile not only can be used for a compressor, but also can be used for a heat pump.
Description
Technical field
The present invention relates to a kind of Novel asymmetric twin-screw molded line, double-screw compressor and heat pump.
Background technique
The differentiation of molded line and optimization are mainly reflected in the parametric equation composition relation of molded line section, are reflected in centre distance, gear ratio, the isoparametric selection of tooth depth coefficient.Optimize the overall targets such as the tightness of main frame, area utilization factor, manufacturability, rigidity and intensity simultaneously.Tradition utilizes modern computer and processing technique connected applications spline function according to several discrete points, draws Smooth Fitting curve, then asks the conjugate curve of this smoothed curve.To reach desirable the approaching of molded line infinite approach.But owing to lacking prototype equation, cannot import processing and trace routine to improve precision.
Summary of the invention
An object of the present invention is to overcome deficiency of the prior art, provides a kind of prototype equation and parameter of Novel asymmetric twin-screw molded line.
For realizing above object, the present invention is achieved through the following technical solutions:
Novel asymmetric twin-screw molded line, is characterized in that, comprises female screw and positive screw rod; Described female screw and positive screw rod are multiple tooth screw rod; Described positive screw rod is meshed with described female screw; The profile of tooth of multiple teeth of described female screw is identical, along the circumferencial direction array distribution of described female screw; The profile of tooth of one of them tooth is successively by arc section a2-e2, arc section a2-b2; Circular arc conjugation line segment b2-c2; Oval line segment d2-e2 composition; Described female screw curved dies is as follows:
Arc section a2 ~ e2 ':
Arc section a2 ~ b2:
Circular arc conjugation line segment b2 ~ c2:
Arc section c2 ~ d2:
Oval line segment d2 ~ e2:
The profile of tooth of multiple teeth of described positive screw rod is identical, along the circumferencial direction array distribution of described positive screw rod; The profile of tooth of one of them tooth is made up of successively arc section a1-e1 ', circular arc conjugation line segment a1-g, arc section g-c1, arc section c1-d1, oval line segment d1-e1 successively; Described positive screw molded lines equation is as follows:
Arc section a1 ~ e1 ':
Arc section g ~ C1:
Circular arc conjugation line segment a1 ~ g:
-92°≤t1≤20° R7＝C7*D0
Arc section c1 ~ d1:
Oval line segment d1 ~ e1:
0≤t2≤90 ° a/b/c/d/ θ 1/r2t/A is with female rotor section
Preferably, the number of teeth of described female screw is more than the number of teeth of described positive screw rod, and gear ratio is 6: 5.
Preferably, described positive screw rod is five tooth screw rods.
Preferably, described female screw is six tooth screw rods.
Preferably, the number of teeth of described female screw is greater than the number of teeth of described positive screw rod.
Two of object of the present invention is to overcome deficiency of the prior art, provides a kind of novel double-screw compressor.
For realizing above object, the present invention is achieved through the following technical solutions:
Double-screw compressor, is characterized in that, comprises aforesaid Novel asymmetric twin-screw molded line.
Three of object of the present invention is to overcome deficiency of the prior art, provides a kind of novel heat pump.
For realizing above object, the present invention is achieved through the following technical solutions:
A kind of heat pump, is characterized in that, comprise aforesaid Novel asymmetric twin-screw molded line.
Novel asymmetric twin-screw molded line feature in the present invention: asymmetric, wholecircle smooth transition, is convenient to milling, grinding, can directly derive cutter molded line according to conjugate principle, be convenient to the design and manufaction of cutter, area utilization factor is large, and noise is lower, vibrate little, energy efficient, the life-span is longer.
The invention provides the derivation design of screw molded lines prototype equation, CNC easily can be allowed to pass through programming curved dies program and directly import processing and trace routine.By technological scheme of the present invention, prototype very in kind can be accomplished, accurately comparison inspection and processing, and then improve profile accuracy.
The invention provides Novel asymmetric twin-screw molded line prototype equation, Equation of engaged line, helical tooth flank equation can be tried to achieve further accordingly.This is for the key element of quantitative analysis molded lines of rotor, and as contact line length, leakage triangle size, enclosed volume size, and between cog size creates condition easily.As from the foregoing, the method has actual reference significance for the equation of rotor profile curve analysis be made up of circular arc and arc envelope line and Performance Analysis all very much.
According to the screw molded lines in the present invention, the contrate tooth profile of negative and positive screw rod is conjugate curve, and Line of contact (shows as line of contact to close) continuously and can meet tightness requirement on Transverse plane.Line of contact summit, as far as possible close to the intersection point of two screw rods cylindrical, can make to leak as far as possible few.Enclosed volume is little, can area increased utilization factor.Decrease contact line length, be convenient to manufacturing.
According to the twin-screw molded line prototype equation in the present invention, more accurately can carry out batch production and manufacture thus reach high-precision spatial engagement, obtain more excellent Energy Efficiency Ratio.Twin-screw in the present invention has following effect:
(1), composition tooth curve is circular arc or arc envelope line, and Line of contact is short, engagement steadily, good airproof performance, efficiency is high, is convenient to grinding and Milling Process;
(2), be smoothly connected between each constituent curve, without cusp on molded line, be convenient to processing and detect, cleanliness is good, and noise is low;
(3), adopt bilateral molded line, root diameter is easy to adjust, and between rotor, Torque distribution is reasonable, and rotatable dynamic balance is good, and high speed operation state lower bearing is steady;
(4), tooth depth radius and addendum be reasonable, and area utilization factor is large, obtains larger air displacement;
(5), these rotor tooth forms are all made up of circular arc and arc envelope line, the sealing of " curved surface is to curved surface " can be realized completely between rotor, be conducive to the formation of hydrodynamic lubrication oil film, be decreased through the transverse leakage of Line of contact, improve excellent Energy Efficiency Ratio, be convenient to the design and manufaction of cutter, which in turn improve the processibility of rotor simultaneously, be convenient to adopt grinding, Milling Process. by the spatial conjugate movement process with the software dynamic simulation two rotor flank of tooth, do not occur the mutual interference phenomenon of the flank of tooth, normal gap is evenly smooth.
Novel double-screw molded line in the present invention, both may be used for compressor, also may be used for heat pump.
Accompanying drawing explanation
Fig. 1 is the female screw molded line structure schematic diagram in the present invention.
Fig. 2 is the positive screw molded lines structural representation in the present invention.
Fig. 3 is the Novel asymmetric double-screw type line structure schematic diagram in the present invention.
Embodiment
Below in conjunction with embodiment, the present invention is described in detail.
As shown in Figure 1 to Figure 3, Novel asymmetric twin-screw molded line, comprises female screw 10 and positive screw rod 20.Described female screw 10 and positive screw rod 20 are multiple tooth screw rod.The number of teeth of described female screw 10 is more than the number of teeth of described positive screw rod 20.In example as shown in the figure, described female screw 10 is six tooth screw rods, its along the circumferential direction array distribution have six teeth 11.Described positive screw rod 20 is five tooth screw rods, and it is along the circumferential direction evenly distributed with five teeth 21.In Fig. 1, O1 is the positive screw rod center of circle, and W1 is positive screw rod sense of rotation.O2 is the female screw center of circle, and W2 is female screw sense of rotation.
Sun screw rod 20 is meshed with female screw 10.The profile of tooth of the multiple and tooth 11 of female screw 10 is identical, along the circumferencial direction array distribution of female screw 10.The profile of tooth of one of them tooth 11 is successively by arc section a2-e2, arc section a2-b2; Circular arc conjugation line segment b2-c2; Oval line segment d2-e2 composition; Described female screw curved dies is as follows:
Arc section a2 ~ e2 ':
Arc section a2 ~ b2:
Circular arc conjugation line segment b2 ~ c2:
Arc section c2 ~ d2:
Oval line segment d2 ~ e2:
Multiple tooth of sun screw rod 20 is identical with the profile of tooth of 21, along the circumferencial direction array distribution of positive screw rod 20.The profile of tooth of one of them tooth 21 is made up of successively arc section a1-e1 ', circular arc conjugation line segment a1-g, arc section g-c1, arc section c1-d1, oval line segment d1-e1 successively; Described positive screw rod 20 curved dies is as follows:
Arc section a1 ~ e1 ':
Arc section g ~ C1:
Circular arc conjugation line segment a1 ~ g:
-92°≤t1≤20° R7＝C7*D0
Arc section c1 ~ d1:
Oval line segment d1 ~ e1:
In equation, corresponding parameter list is as follows:
| Parameter name | Pa-rameter symbols | Coefficient of correspondence symbol |
| Centre distance | A | C0 |
| Male rotor Pitch radius | r1t | C1 |
| Female rotor Pitch radius | r2t | C2 |
| Male rotor external diameter | D1 | |
| Female rotor external diameter | D2 | |
| Pin tooth radius of arc | R3 | C3 |
| Female rotor ellipse major axis | a | C4 |
| Female rotor ellipse minor axis | b | C5 |
| Male rotor nipper tooth top radius | R6 | C6 |
| Female rotor nipper tooth top radius | R7 | C7 |
| Slenderness ratio | λ | C8 |
| Female rotor outer radius | R2 | C9 |
| Male rotor Root radius | R01 | C10 |
Other relevant parameters: nominal diameter D0; Female screw and positive screw rod gear ratio 5/6; θ 1=39 °;
Novel double-screw molded line in the present invention, both may be used for compressor, also may be used for heat pump.
Novel asymmetric twin-screw molded line feature in the present invention: asymmetric, wholecircle smooth transition, is convenient to milling, grinding, can directly derive cutter molded line according to conjugate principle, be convenient to the design and manufaction of cutter, area utilization factor is large, and noise is lower, vibrate little, energy efficient, the life-span is longer.
The invention provides the derivation design of screw molded lines prototype equation, CNC easily can be allowed to pass through programming curved dies program and directly import processing and trace routine.By technological scheme of the present invention, prototype very in kind can be accomplished, accurately comparison inspection and processing, can profile accuracy be improved.
The invention provides Novel asymmetric twin-screw molded line prototype equation, Equation of engaged line, helical tooth flank equation can be tried to achieve further accordingly.This is for the key element of quantitative analysis molded lines of rotor, and as contact line length, leakage triangle size, enclosed volume size, and between cog size creates condition easily.As from the foregoing, the method has actual reference significance for the equation of rotor profile curve analysis be made up of circular arc and arc envelope line and Performance Analysis all very much.
According to the screw molded lines in the present invention, the contrate tooth profile of negative and positive screw rod is conjugate curve, and Line of contact (shows as line of contact to close) continuously and can meet tightness requirement on Transverse plane.Line of contact summit, as far as possible close to the intersection point of two screw rods cylindrical, can make to leak as far as possible few.Enclosed volume is little, can area increased utilization factor.Decrease contact line length, be convenient to manufacturing.
According to the twin-screw molded line prototype equation in the present invention, more accurately can carry out batch production and manufacture thus reach high-precision spatial engagement, obtain more excellent Energy Efficiency Ratio., the twin-screw in the present invention has following effect:
(1) form tooth curve and be circular arc or arc envelope line, Line of contact is short, and engagement is steady, good airproof performance, and efficiency is high, is convenient to grinding and Milling Process;
(2) be smoothly connected between each constituent curve, without cusp on molded line, be convenient to processing and detect, cleanliness is good, and noise is low;
(3) adopt bilateral molded line, root diameter is easy to adjust, and between rotor, Torque distribution is reasonable, and rotatable dynamic balance is good, and high speed operation state lower bearing is steady;
(4) tooth depth radius and addendum are rationally, become long-pending utilization factor large, large air displacement;
(5) these rotor tooth forms are all made up of circular arc and arc envelope line, the sealing of " curved surface is to curved surface " can be realized completely between rotor, be conducive to the formation of hydrodynamic lubrication oil film, be decreased through the transverse leakage of Line of contact, improve the efficiency of compressor, be convenient to the design and manufaction of cutter, which in turn improve the processibility of rotor simultaneously, be convenient to adopt grinding, Milling Process. with the spatial conjugate movement process of the software dynamic simulation two rotor flank of tooth, there is not the mutual interference phenomenon of the flank of tooth.
Embodiment in the present invention, only for the present invention will be described, does not form the restriction to right, other equivalent in fact substituting, all in scope that those skilled in that art can expect.
Claims (7)
1. Novel asymmetric twin-screw molded line, is characterized in that, comprises female screw and positive screw rod; Described female screw and positive screw rod are multiple tooth screw rod; Described positive screw rod is meshed with described female screw; The contrate tooth profile of described female screw, along the circumferencial direction array distribution of described female screw; Wherein the profile of tooth of each tooth is successively by arc section a2-e2, arc section a2-b2; Circular arc conjugation line segment b2-c2; Oval line segment d2-e2 composition; The curved dies of described this tooth of female screw is as follows:
Arc section a2 ~ e2 ':
Arc section a2 ~ b2:
Circular arc conjugation line segment b2 ~ c2:
Arc section c2 ~ d2:
Oval line segment d2 ~ e2:
The contrate tooth profile of described positive screw rod, along the circumferencial direction array distribution of described female screw; Wherein the profile of tooth of each tooth is made up of successively arc section a1-e1 ', circular arc conjugation line segment a1-g, arc section g-c1, arc section c1-d1, oval line segment d1-e1 successively; Described positive screw molded lines equation is as follows:
Arc section a1 ~ e1 ':
Arc section g ~ C1:
Circular arc conjugation line segment a1 ~ g:
-92°≤t1≤20° R7＝C7*D0
Arc section c1 ~ d1:
Oval line segment d1 ~ e1:
0≤t2≤90 ° a/b/c/d/ θ 1/r2t/A is with female rotor section.
2. Novel asymmetric twin-screw molded line according to claim 1, is characterized in that, the number of teeth of described female screw and the gear ratio of described positive screw rod are 6: 5.
3. Novel asymmetric twin-screw molded line according to claim 1 and 2, is characterized in that, described positive screw rod is five tooth screw rods.
4. Novel asymmetric twin-screw molded line according to claim 1 and 2, is characterized in that, described female screw is six tooth screw rods.
5. Novel asymmetric twin-screw molded line according to claim 1, is characterized in that, the number of teeth of described female screw is greater than the number of teeth of described positive screw rod.
6. double-screw compressor, is characterized in that, comprises the Novel asymmetric twin-screw molded line described in the arbitrary claim of claim 1 to 5.
7. a heat pump, is characterized in that, comprises the Novel asymmetric twin-screw molded line described in the arbitrary claim of claim 1 to 5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410448876.2A CN104454541A (en) | 2014-09-04 | 2014-09-04 | Novel nonsymmetrical double-screw profile, double-screw compressor and heat pump |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410448876.2A CN104454541A (en) | 2014-09-04 | 2014-09-04 | Novel nonsymmetrical double-screw profile, double-screw compressor and heat pump |
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| CN104454541A true CN104454541A (en) | 2015-03-25 |
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|---|---|---|---|
| CN201410448876.2A Pending CN104454541A (en) | 2014-09-04 | 2014-09-04 | Novel nonsymmetrical double-screw profile, double-screw compressor and heat pump |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN106438343A (en) * | 2016-10-09 | 2017-02-22 | 广东技术师范学院 | Efficient conveying screw |
| CN108930650A (en) * | 2018-07-02 | 2018-12-04 | 西安交通大学 | A kind of double end claw pump rotor and its molded line |
| CN109026163A (en) * | 2018-09-18 | 2018-12-18 | 上海齐耀膨胀机有限公司 | The flute profile of high pressure ratio High Pressure Difference twin-screw expander rotor |
| CN111456940A (en) * | 2020-05-15 | 2020-07-28 | 萨震压缩机（上海）有限公司 | Energy-saving screw molded line |
| CN111967103A (en) * | 2020-08-14 | 2020-11-20 | 温州职业技术学院 | Method for solving end face profile data of three-blade rotary cam rotor pump |
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| US4412796A (en) * | 1981-08-25 | 1983-11-01 | Ingersoll-Rand Company | Helical screw rotor profiles |
| CN1760552A (en) * | 2005-11-21 | 2006-04-19 | 西安交通大学 | Method for designing molded lines of rotor of helical lobe compressor |
| JP2008133763A (en) * | 2006-11-28 | 2008-06-12 | Hitachi Industrial Equipment Systems Co Ltd | Screw fluid machine |
| CN201221468Y (en) * | 2008-07-07 | 2009-04-15 | 宁波欣达螺杆压缩机有限公司 | Screw compressor rotor |
| CN204267295U (en) * | 2014-09-04 | 2015-04-15 | 上海偌托新能源科技有限公司 | Novel asymmetric twin-screw molded line, double-screw compressor and heat pump |
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2014
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US4412796A (en) * | 1981-08-25 | 1983-11-01 | Ingersoll-Rand Company | Helical screw rotor profiles |
| CN1760552A (en) * | 2005-11-21 | 2006-04-19 | 西安交通大学 | Method for designing molded lines of rotor of helical lobe compressor |
| JP2008133763A (en) * | 2006-11-28 | 2008-06-12 | Hitachi Industrial Equipment Systems Co Ltd | Screw fluid machine |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106438343A (en) * | 2016-10-09 | 2017-02-22 | 广东技术师范学院 | Efficient conveying screw |
| 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 |
| 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 |
| CN108930650A (en) * | 2018-07-02 | 2018-12-04 | 西安交通大学 | A kind of double end claw pump rotor and its molded line |
| CN109026163A (en) * | 2018-09-18 | 2018-12-18 | 上海齐耀膨胀机有限公司 | The flute profile of high pressure ratio High Pressure Difference twin-screw expander rotor |
| CN109026163B (en) * | 2018-09-18 | 2023-08-08 | 上海齐耀膨胀机有限公司 | Tooth type of rotor of high-pressure ratio high-pressure difference double-screw expander |
| CN111456940A (en) * | 2020-05-15 | 2020-07-28 | 萨震压缩机（上海）有限公司 | Energy-saving screw molded line |
| CN111967103A (en) * | 2020-08-14 | 2020-11-20 | 温州职业技术学院 | Method for solving end face profile data of three-blade rotary cam rotor pump |
| CN111967103B (en) * | 2020-08-14 | 2023-09-26 | 温州职业技术学院 | Method for obtaining end face molded line data of three-blade rotary cam rotor pump |
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Application publication date: 20150325 |