CN100360810C - Screw profile for high flow high-pressure dual-screw pump - Google Patents
Screw profile for high flow high-pressure dual-screw pump Download PDFInfo
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- CN100360810C CN100360810C CNB2005100609773A CN200510060977A CN100360810C CN 100360810 C CN100360810 C CN 100360810C CN B2005100609773 A CNB2005100609773 A CN B2005100609773A CN 200510060977 A CN200510060977 A CN 200510060977A CN 100360810 C CN100360810 C CN 100360810C
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- camber line
- circle camber
- double threaded
- circular arc
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- 238000007789 sealing Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Abstract
The present invention discloses tooth shapes of screws for a double-screw pump with large flow, wherein one screw is a one-head screw, and the other screw is a double-head screw. When the screws of the present invention are used for screw pump, the screws of the present invention have the advantages of short seal line, good sealing performance, high efficiency, low noise, simple screw curve, convenient processing and low processing cost; in addition, the output flow and the output pressure are increased in multiples.
Description
Technical field
The present invention relates to the Course Exercise in Machinery Elements Design processing technique field, especially, relate to a kind of tooth shape of screw of big-flow high-pressure two screw pump.
Background technique
99201251.1), the spiral of Archimedes tooth shape of screw (patent No.: 96236524.6) and involute profile etc. the profile of tooth of two screw pump screw rod has the cycloidal tooth profile (patent No.:.But all above-mentioned profiles of tooth are single head, and the cross section of two screw rods is all identical.The profile of tooth of the two screw pump screw rod of minority also has double end, but two screw rods all are double ends, and the number of teeth equates that shape of cross section is identical, and can not seal fully.No matter be screw rod single head or double end, their common drawback is: 1, specific discharge is little, and 2, delivery pressure is low.
Profile of tooth of the present invention is compared with above-mentioned various profiles of tooth, and specific discharge and delivery pressure increase exponentially, and processing is still more convenient.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art, a kind of tooth shape of screw of big-flow high-pressure two screw pump is provided, the profile of tooth of one root screw rod is a single head, and another root is a double end.
In order to achieve the above object, the technical solution used in the present invention is as follows:
A kind of tooth shape of screw of big-flow high-pressure two screw pump, screw pump comprise two screw rods, and a screw rod is a single-head screw, and another root screw rod is a double threaded screw;
The single-head screw radial cross section is linked in sequence and is formed by top circle camber line a ' b ', generalized cycloidal a ' f ', envelope f ' e ', root circle camber line d ' e ', envelope c ' d ', generalized cycloidal b ' c '; Wherein, top circle camber line a ' b ' and root circle camber line d ' e ' are with o
2Be the circular arc in the center of circle, the radius of top circle camber line a ' b ' is the twice of root circle camber line d ' e ' radius;
The double threaded screw radial cross section is linked in sequence by top circle camber line aj, radial alignment section jk, generalized cycloidal ki, root circle camber line hi, generalized cycloidal lh, radial alignment section gl, top circle camber line fg, radial alignment section ef, generalized cycloidal de, root circle camber line cd, generalized cycloidal bc and radial alignment section ab and forms; Wherein, top circle camber line aj, fg and root circle camber line cd, hi are with o
1Circular arc for the center of circle;
The radian of circular arc d ' e ' is the twice of the radian of circular arc aj on the double threaded screw on the described single-head screw, and the radian of circular arc a ' b ' is the twice of circular arc cd radian on the double threaded screw on the single-head screw; The tooth depth of described single-head screw equals the tooth depth of double threaded screw.
Further, described radial alignment section ab, ef, jk, gl also can be circular arc, cycloid or involute.
Further, the helical pitch of described double threaded screw is the twice of single-head screw helical pitch.
The invention has the beneficial effects as follows: potted line is shorter, good seal performance; Output flow and delivery pressure are multiplied, the efficient height, and noise is little; Screw curve is simple, and is easy to process, and processing cost is low.
Description of drawings
Fig. 1 is the longitudinal section view of double threaded screw of the present invention;
Fig. 2 is the longitudinal section view of single-head screw of the present invention;
Fig. 3 is two screw rods illustrated in figures 1 and 2 engagement figure when doing to roll;
Fig. 4 is two screw rods illustrated in figures 1 and 2 pitch curve figure when doing to roll.
Embodiment
Below in conjunction with accompanying drawing, the present invention is done detailed explanation.
Screw pump of the present invention comprises two screw rods, and a screw rod is a single-head screw, and another root screw rod is a double threaded screw.
Fig. 1 shows the shape of double threaded screw radial cross section of the present invention, and the profile of tooth of two screw rod of double threaded screw is identical, and is symmetrically distributed along circumference, and top circle camber line aj and fg are with o
1Be the circular arc in the center of circle, root circle camber line cd and hi are with o
1Circular arc for the center of circle, form by radial alignment section ab and generalized cycloidal bc between top circle camber line aj 1 end a point and root circle camber line cd 1 end c point, form by radial alignment section ef and generalized cycloidal de between top circle camber line fg 1 end f point and root circle camber line cd the other end d point; Form by radial alignment section jk and generalized cycloidal ki between top circle camber line aj 1 end j point and root circle camber line hi 1 end i point, form by radial alignment section gl and generalized cycloidal lh between top circle camber line fg 1 end g point and root circle camber line hi the other end h point.The radius of root circle camber line cd and hi and radian are all adjustable, and the limiting value of its radian is zero, radial alignment section ab, and ef, the length-adjustable of gl and jk, ab, ef, gl and jk also can be circular arc, cycloid, involute or other curves, also can omit.
Fig. 2 shows the shape of single-head screw radial cross section of the present invention, and top circle camber line a ' b ' is with o
2Be the circular arc in the center of circle, root circle camber line d ' e ' is with o
2Circular arc for the center of circle, form by generalized cycloidal a ' f ' and envelope f ' e ' between a top circle camber line a ' b ' end a ' point and a root circle camber line d ' e ' end e ' point, be made up of generalized cycloidal b ' c ' and envelope c ' d ' between root circle camber line d ' e ' the other end d ' point and top circle camber line a ' b ' the other end b ' point, the radius of top circle camber line a ' b ' is the twice of root circle camber line d ' e ' radius.
The radian of circular arc d ' e ' is the twice of the radian of circular arc aj on the double threaded screw shown in Figure 1 on the single-head screw of single-head screw shown in Figure 2, and the radian of circular arc a ' b ' is the twice of circular arc cd radian on the double threaded screw on the single-head screw,
When single-head screw and double threaded screw with 2: 1 speed ratio when rotate in the center of circle separately, generalized cycloidal bc and de are respectively the conjugate curve that b ' puts and a ' point forms on double threaded screw on the single-head screw on the double threaded screw, generalized cycloidal a ' f ' and b ' c ' are respectively the conjugate curve that e point on the double threaded screw and b point form on single-head screw on the single-head screw, and envelope f ' e ' and c ' d ' are respectively the conjugate curve that straightway ef on the double threaded screw and ab form on single-head screw.
The tooth depth of single-head screw (being the Outside radius of single-head screw and the difference of root radius) equals the tooth depth (being the Outside radius of double threaded screw and the difference of root radius) of double threaded screw.The helical pitch of double threaded screw profile of tooth is the twice of single-head screw, and the length of screw rod is slightly larger than the helical pitch of double threaded screw, and the two screw rods rotation direction is opposite.
Fig. 3 shows the meshing relation of two screw rods correspondence of the present invention, the pitch curve of double threaded screw top circle aj and root circle cd correspondence is respectively the root circle d ' e ' and the top circle a ' b ' of single-head screw, put a ' on the single-head screw and put b ' and correspond respectively to generalized cycloidal de and generalized cycloidal bc on the double threaded screw, point b and some e correspond respectively to generalized cycloidal b ' c ' and generalized cycloidal a ' f ' on the single-head screw on the double threaded screw, and radial alignment section ab and ef correspond respectively to envelope c ' d ' and the f ' e ' on the single-head screw on the double threaded screw.
As shown in Figure 4, when two screw rods rolled relatively, double threaded screw will form the space pitch curve on single-head screw, and single-head screw also can form corresponding pitch curve on double threaded screw.Because it is continuous rotating, two pitch curves have been blocked the input cavity and the output cavity of pump, and constantly push ahead, thereby produce compressed fluid.
The foregoing description is used for the present invention that explains, rather than limits the invention, and in the protection domain of spirit of the present invention and claim, any modification and change to the present invention makes all fall into protection scope of the present invention.
Claims (3)
1, a kind of tooth shape of screw of big-flow high-pressure two screw pump, screw pump comprise two screw rods, and a screw rod is a single-head screw, and another root screw rod is a double threaded screw, it is characterized in that,
The single-head screw radial cross section is linked in sequence and is formed by top circle camber line a ' b ', generalized cycloidal a ' f ', envelope f ' e ', root circle camber line d ' e ', envelope c ' d ', generalized cycloidal b ' c '; Wherein, top circle camber line a ' b ' and root circle camber line d ' e ' are the central point o with single-head screw
2Be the circular arc in the center of circle, the radius of top circle camber line a ' b ' is the twice of root circle camber line d ' e ' radius;
The profile of tooth of two screw rod of double threaded screw is identical, and be symmetrically distributed along circumference, its radial cross section is linked in sequence by top circle camber line aj, radial alignment section jk, generalized cycloidal ki, root circle camber line hi, generalized cycloidal lh, radial alignment section gl, top circle camber line fg, radial alignment section ef, generalized cycloidal de, root circle camber line cd, generalized cycloidal bc and radial alignment section ab and forms; Wherein, top circle camber line aj, fg and root circle camber line cd, hi are the central point o with double threaded screw
1Circular arc for the center of circle;
The radian of circular arc d ' e ' is the twice of the radian of circular arc aj on the double threaded screw on the described single-head screw, and the radian of circular arc a ' b ' is the twice of circular arc cd radian on the double threaded screw on the single-head screw;
The tooth depth of described single-head screw equals the tooth depth of double threaded screw.
2, the tooth shape of screw of big-flow high-pressure two screw pump according to claim 1 is characterized in that, described double threaded screw radial alignment section ab, ef, jk, gl are circular arc, cycloid or involute.
3, the tooth shape of screw of big-flow high-pressure two screw pump according to claim 1 is characterized in that, the helical pitch of described double threaded screw is the twice of single-head screw helical pitch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100609773A CN100360810C (en) | 2005-09-30 | 2005-09-30 | Screw profile for high flow high-pressure dual-screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100609773A CN100360810C (en) | 2005-09-30 | 2005-09-30 | Screw profile for high flow high-pressure dual-screw pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1743678A CN1743678A (en) | 2006-03-08 |
| CN100360810C true CN100360810C (en) | 2008-01-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100609773A Expired - Fee Related CN100360810C (en) | 2005-09-30 | 2005-09-30 | Screw profile for high flow high-pressure dual-screw pump |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009275586A (en) * | 2008-05-14 | 2009-11-26 | Kobe Steel Ltd | Screw tooth form |
| JP5353521B2 (en) * | 2009-07-22 | 2013-11-27 | 株式会社豊田自動織機 | Screw rotor |
| CN110242561B (en) * | 2019-07-24 | 2023-10-24 | 中国石油大学(华东) | High-flow screw rotor of double-screw pump and design method thereof |
| CN110552879B (en) * | 2019-09-29 | 2024-05-24 | 陈行 | Four-screw pump |
| CN112539171B (en) * | 2020-12-07 | 2022-11-11 | 浙江博大泵业有限公司 | Two-head three-head glue-applying double screw |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4773837A (en) * | 1985-06-24 | 1988-09-27 | Kawasaki Jukogyo Kabushiki Kaisha | Screw pump |
| JP2001073959A (en) * | 1999-08-31 | 2001-03-21 | Shigeyoshi Osada | Screw pump |
| CN1140711C (en) * | 2001-01-21 | 2004-03-03 | 华南理工大学 | Toothed screw bolt |
| CN1584337A (en) * | 2004-06-14 | 2005-02-23 | 浙江大学 | Screw tooth form of double-screw air compressor |
-
2005
- 2005-09-30 CN CNB2005100609773A patent/CN100360810C/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4773837A (en) * | 1985-06-24 | 1988-09-27 | Kawasaki Jukogyo Kabushiki Kaisha | Screw pump |
| JP2001073959A (en) * | 1999-08-31 | 2001-03-21 | Shigeyoshi Osada | Screw pump |
| CN1140711C (en) * | 2001-01-21 | 2004-03-03 | 华南理工大学 | Toothed screw bolt |
| CN1584337A (en) * | 2004-06-14 | 2005-02-23 | 浙江大学 | Screw tooth form of double-screw air compressor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1743678A (en) | 2006-03-08 |
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Application publication date: 20060308 Assignee: Zhejiang top rubber equipment Co., Ltd. Assignor: Zhejiang University Contract record no.: 2010330000141 Denomination of invention: Screw profile for high flow high-pressure dual-screw pump Granted publication date: 20080109 License type: Exclusive License Record date: 20100224 |
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Granted publication date: 20080109 Termination date: 20140930 |
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