CN101576079A - Screw gear form of double screw pump - Google Patents
Screw gear form of double screw pump Download PDFInfo
- Publication number
- CN101576079A CN101576079A CNA2009100692340A CN200910069234A CN101576079A CN 101576079 A CN101576079 A CN 101576079A CN A2009100692340 A CNA2009100692340 A CN A2009100692340A CN 200910069234 A CN200910069234 A CN 200910069234A CN 101576079 A CN101576079 A CN 101576079A
- Authority
- CN
- China
- Prior art keywords
- screw
- driven
- tooth
- double
- tooth shape
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Rotary Pumps (AREA)
Abstract
The invention relates to a screw gear form of a double screw pump, which comprises a double-ended driving screw and a three-ended driven screw. The gear forms of each end screw of the double-ended driving screw are the same and the double-ended driving screws are evenly distributed along the circumference. One end of the double-ended driving screw comprises circular arc envelope lines, generalized cycloid, a circular arc of the gear top and a circular arc of the gear root. The gear forms of each end driven screw of the three-ended driven screw are the same and the three-ended driven screws are evenly distributed along the circumference. One end of the three-ended driven screw comprises a transitional arc of crest, generalized cycloid, a tooth root arc and a gear top arc. The screw gear form can substitute the three-screw pump in specific occasions. With the same dimension of the shell body, the flow of the invention is higher than that of the three-screw pump. The screw gear form has higher use-value in occasions with higher requirements for space. The operational parts hereof are less than three-screw pump and the reliability is higher. In addition, the screw gear form is easily processed and the manufacturing cost thereof is low.
Description
Technical field
The invention belongs to the screw pump technical field, particularly relate to a kind of screw gear form of double screw pump.
Background technique
Two screw pump in the market is mainly used in the bigger occasion of flow, but along with the development need of automobile and other industries, bigger for screw pump product (flow is less than the 300L/h) demand of small dimension.But the size of traditional synchromesh gear two screw pump structure is bigger, is not suitable for being installed in the automobile, complex structure, and poor reliability, and also the modulus of profile of tooth is less, causes the manufacture cost height.
Summary of the invention
The present invention provides a kind of simple and compact for structure, suitable screw gear form of double screw pump that is installed in the automobile of low cost of manufacture for solving the technical problem that exists in the known technology.
The technological scheme that the present invention takes for the technical problem that exists in the solution known technology is:
A kind of screw gear form of double screw pump, screw pump have a double end initiatively screw rod and three driven screw rods: it is characterized in that:
Every tooth shape of screw of double end active screw rod is identical, and evenly distribute along circumference, wherein form by arc envelope line ab, generalized cycloidal bc, tooth top circular arc cd, generalized cycloidal de, arc envelope line ef and tooth root circular arc fg for one, wherein tooth top circular arc cd and tooth root circular arc fg all be with double end initiatively the center o point of screw rod be the circular arc in the center of circle;
Every tooth shape of screw of three driven screw rods is identical, and evenly distribute along circumference, wherein be made up of tooth top transition arc a ' b ', generalized cycloidal b ' c ', tooth root circular arc c ' d ', generalized cycloidal d ' e ', tooth top transition arc e ' f ', tooth top circular arc f ' g ' for one, wherein tooth top circular arc f ' g ' and tooth root circular arc c ' d ' are that the center o1 point with three driven screw rods is the circular arc in the center of circle.
The present invention can also adopt following technological scheme:
The helical pitch of described three driven tooth shape of screw is initiatively 1.5 times of helical pitch of tooth shape of screw of double end.
The external diameter of described double end active screw rod is greater than three driven screw rod external diameters.
Generalized cycloidal b ' the c ' of described three driven tooth shape of screw is the cycloid that double end active tooth shape of screw c is ordered, and the generalized cycloidal d ' e ' of three driven tooth shape of screw is the cycloid that double end active tooth shape of screw d is ordered.
The generalized cycloidal bc of described double end active tooth shape of screw is three driven tooth shape of screw b ' a cycloid, and the generalized cycloidal de of double end active tooth shape of screw is three driven tooth shape of screw e ' a cycloid.
The described double end initiatively arc envelope line ab of tooth shape of screw is the envelope of the tooth top transition arc a ' b ' of three driven tooth shape of screw, and the double end initiatively arc envelope line ef of tooth shape of screw is the envelope of the tooth top transition arc e ' f ' of three driven tooth shape of screw.
Advantage and good effect that the present invention has are: the invention belongs to the two screw pump product that is suitable for small dimension, can substitute three screw pump in the specific occasion and use.And under same shell dimension, flow-rate ratio three screw pump height than higher occasion, has higher use value as the two screw pump of automobile accessories for spatial requirement.And because running gear lacks one than three screw pump, so reliability is also than the three screw pump height.In addition, compare with the three screw pump of same specification, driven screw size is thicker, so processibility further improves, has reduced manufacture cost.
Description of drawings
Fig. 1 is the initiatively longitudinal section view of tooth shape of screw of double end of the present invention;
Fig. 2 is the longitudinal section view of three driven tooth shape of screw of the present invention;
Fig. 3 is double end engagement figure when initiatively screw rod and three driven screw rods are done to roll.
Embodiment
For further understanding summary of the invention of the present invention, characteristics and effect, exemplify following examples now, and conjunction with figs. is described in detail as follows:
See also Fig. 1-Fig. 3, wherein Fig. 1 has expressed the initiatively shape of screw rod radial cross section of double end of the present invention, every tooth shape of screw of double end active screw rod is identical, and evenly distribute along circumference, wherein form by arc envelope line ab, generalized cycloidal bc, tooth top circular arc cd, generalized cycloidal de, arc envelope line ef and tooth root circular arc fg for one, wherein tooth top circular arc cd and tooth root circular arc fg all be with double end initiatively the center o point of screw rod be the circular arc in the center of circle.
Fig. 2 has expressed the shape of three driven screw rod radial cross sections of the present invention, every tooth shape of screw of three driven screw rods is identical, and evenly distribute along circumference, wherein be made up of tooth top transition arc a ' b ', generalized cycloidal b ' c ', tooth root circular arc c ' d ', generalized cycloidal d ' e ', tooth top transition arc e ' f ', tooth top circular arc f ' g ' for one, wherein tooth top circular arc f ' g ' and tooth root circular arc c ' d ' are that the center o1 point with three driven screw rods is the circular arc in the center of circle.
When double end initiatively screw rod and three driven screw rods with 3: 2 speed ratio when rotate in the center of circle separately, generalized cycloidal b ' the c ' of three driven tooth shape of screw is the cycloid that double end active tooth shape of screw c is ordered, and the generalized cycloidal d ' e ' of three driven tooth shape of screw is the cycloid that double end active tooth shape of screw d is ordered.The generalized cycloidal bc of double end active tooth shape of screw is three driven tooth shape of screw b ' a cycloid, and the generalized cycloidal de of double end active tooth shape of screw is three driven tooth shape of screw e ' a cycloid.The double end initiatively arc envelope line ab of tooth shape of screw is the envelope of the tooth top transition arc a ' b ' of three driven tooth shape of screw, and the double end initiatively arc envelope line ef of tooth shape of screw is the envelope of the tooth top transition arc e ' f ' of three driven tooth shape of screw.
The helical pitch of described three driven tooth shape of screw is initiatively 1.5 times of helical pitch of tooth shape of screw of double end.
The external diameter of double end active screw rod is greater than three driven screw rod external diameters.
Fig. 3 has represented the meshing relation of two screw rods correspondence of the present invention, the double end initiatively pitch curve of the tooth root circular arc fg correspondence of screw rod is the tooth top circular arc f ' g ' of three driven screw rods, the double end initiatively pitch curve of the tooth top circular arc cd correspondence of screw rod is the tooth root circular arc c ' d ' of three driven screw rods, double end active tooth shape of screw c point and d point correspond respectively to the generalized cycloidal b ' c ' and the generalized cycloidal d ' e ' of three driven tooth shape of screw, three driven tooth shape of screw b ' and e ' generalized cycloidal bc and generalized cycloidal de corresponding to double end active tooth shape of screw.The tooth top transition arc a ' b ' of three driven tooth shape of screw and tooth top transition arc e ' f ' correspond respectively to double end initiatively the arc envelope line ab and the arc envelope line ef of tooth shape of screw.
Operating principle of the present invention is:
When double end active screw rod began to roll, three driven screw rods also began relative rolling thereupon, and double end initiatively screw rod will form the space pitch curve on three driven screw rods, and three driven screw rods also can initiatively form corresponding pitch curve on the screw rod in double end.Because continuous when rotating, two pitch curves have been blocked the input cavity and the output cavity of pump, and constantly push ahead, thereby produce compressed fluid.
Claims (6)
1, a kind of screw gear form of double screw pump, screw pump comprise a double end initiatively screw rod and three driven screw rods, it is characterized in that:
Every tooth shape of screw of double end active screw rod is identical, and evenly distribute along circumference, wherein form by arc envelope line ab, generalized cycloidal bc, tooth top circular arc cd, generalized cycloidal de, arc envelope line ef and tooth root circular arc fg for one, wherein tooth top circular arc cd and tooth root circular arc fg all be with double end initiatively the center o point of screw rod be the circular arc in the center of circle;
Every tooth shape of screw of three driven screw rods is identical, and evenly distribute along circumference, wherein be made up of tooth top transition arc a ' b ', generalized cycloidal b ' c ', tooth root circular arc c ' d ', generalized cycloidal d ' e ', tooth top transition arc e ' f ', tooth top circular arc f ' g ' for one, wherein tooth top circular arc f ' g ' and tooth root circular arc c ' d ' all are the center o with three driven screw rods
1Point is the circular arc in the center of circle.
2, screw gear form of double screw pump according to claim 1 is characterized in that: the helical pitch of described three driven tooth shape of screw is initiatively 1.5 times of helical pitch of tooth shape of screw of double end.
3, screw gear form of double screw pump according to claim 1 is characterized in that: the external diameter of described double end active screw rod is greater than three driven screw rod external diameters.
4, screw gear form of double screw pump according to claim 1, it is characterized in that: the cycloid that the generalized cycloidal b ' c ' of described three driven tooth shape of screw is ordered for double end active tooth shape of screw c, the generalized cycloidal d ' e ' of three driven tooth shape of screw are the cycloid that double end active tooth shape of screw d is ordered.
5, screw gear form of double screw pump according to claim 1, it is characterized in that: the generalized cycloidal bc of described double end active tooth shape of screw is three driven tooth shape of screw b ' a cycloid, and the generalized cycloidal de of double end active tooth shape of screw is three driven tooth shape of screw e ' a cycloid.
6, screw gear form of double screw pump according to claim 1, it is characterized in that: the described double end initiatively arc envelope line ab of tooth shape of screw is the envelope of the tooth top transition arc a ' b ' of three driven tooth shape of screw, and the double end initiatively arc envelope line ef of tooth shape of screw is the envelope of the tooth top transition arc e ' f ' of three driven tooth shape of screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100692340A CN101576079A (en) | 2009-06-12 | 2009-06-12 | Screw gear form of double screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100692340A CN101576079A (en) | 2009-06-12 | 2009-06-12 | Screw gear form of double screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101576079A true CN101576079A (en) | 2009-11-11 |
Family
ID=41271106
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100692340A Pending CN101576079A (en) | 2009-06-12 | 2009-06-12 | Screw gear form of double screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101576079A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400913A (en) * | 2011-10-29 | 2012-04-04 | 黄山众拓工业泵制造有限公司 | Seal type tooth-form molded line screw rod |
| CN108050059A (en) * | 2018-01-22 | 2018-05-18 | 中国石油大学(华东) | A kind of nothing is stranded the lobe pump of liquid phenomenon |
| CN112539171A (en) * | 2020-12-07 | 2021-03-23 | 浙江博大泵业有限公司 | Two-head three-head glue-applying double screw |
-
2009
- 2009-06-12 CN CNA2009100692340A patent/CN101576079A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102400913A (en) * | 2011-10-29 | 2012-04-04 | 黄山众拓工业泵制造有限公司 | Seal type tooth-form molded line screw rod |
| CN102400913B (en) * | 2011-10-29 | 2014-04-16 | 黄山众拓工业泵制造有限公司 | Seal type tooth-form molded line screw rod |
| CN108050059A (en) * | 2018-01-22 | 2018-05-18 | 中国石油大学(华东) | A kind of nothing is stranded the lobe pump of liquid phenomenon |
| CN112539171A (en) * | 2020-12-07 | 2021-03-23 | 浙江博大泵业有限公司 | Two-head three-head glue-applying double screw |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106194717B (en) | A kind of rubber screw rod molded lines of rotor suitable for spiral displacement pump | |
| CN105971877A (en) | Conical screw rotor and double-screw vacuum pump thereof | |
| CN101576079A (en) | Screw gear form of double screw pump | |
| CN100360810C (en) | Screw profile for high flow high-pressure dual-screw pump | |
| CN102094813B (en) | Gear pump with asymmetric combined curved surface tooth form | |
| CN100360808C (en) | Unequal-tooth-number screw profile for high-flow high-pressure three-screw pump | |
| CN107061271B (en) | Wide-head rotor of high-vacuum displacement pump | |
| CN100360809C (en) | Unequal-tooth-number screw profile for high-flow high-pressure dual-screen pump | |
| CN101424266B (en) | Oblique star wheel single screw compressor | |
| CN2861556Y (en) | Screw tooth form of unequal-number of teeth unequal-radius double-screw pump | |
| CN210889307U (en) | Screw molded line of four-screw pump | |
| CN100538081C (en) | A kind of screw molded lines of screw-rod air compressor | |
| CN201209556Y (en) | Screw of screw compressor | |
| CN101280779B (en) | Screw rod of double-screw rod compressor | |
| CN201232638Y (en) | Screw for screw compressor | |
| CN203230794U (en) | Gapless worm and gear speed reducer for industrial pipe mechanical device | |
| CN100417816C (en) | Screw profile for high-flow high-pressure three-screw pump | |
| CN101089396A (en) | Screw molded lines of symmetric figure screw air compressor | |
| CN100538079C (en) | The screw molded lines of the big flow screw-rod air compressor of a kind of symmetric figure | |
| CN100538080C (en) | A kind of screw molded lines of big flow screw-rod air compressor | |
| CN100532844C (en) | Screw rod line of novel screw air compressor | |
| CN101280778A (en) | Screw rod of screw compressor | |
| CN110552879B (en) | Four-screw pump | |
| CN1584337A (en) | Screw tooth form of double-screw air compressor | |
| CN101086256B (en) | Symmetrical screw type air compressor screw profile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20091111 |