CN100417816C - Screw profile for high-flow high-pressure three-screw pump - Google Patents
Screw profile for high-flow high-pressure three-screw pump Download PDFInfo
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- CN100417816C CN100417816C CNB2005100609754A CN200510060975A CN100417816C CN 100417816 C CN100417816 C CN 100417816C CN B2005100609754 A CNB2005100609754 A CN B2005100609754A CN 200510060975 A CN200510060975 A CN 200510060975A CN 100417816 C CN100417816 C CN 100417816C
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Abstract
The present invention discloses a tooth shape of a screw for a three-screw pump with large flow and high-pressure. The screw of the present invention is a screw with a novel tooth shape and is composed of a driven screw and a drive screw, wherein the driven screw has a tooth shape of a male screw with a single head, and the drive screw has a tooth shape of a female screw with three heads. When the screw of the present invention is used for a screw pump, the screw of the present invention has 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 of the screw pump 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 three screw pump.
Background technique
On over 100 years, no matter the profile of tooth of three screw pump screw rod is that initiatively screw rod or driven screw rod are formed by cycloid, and is double threaded screw.Driven screw rod is not only thin but also long, the rigidity extreme difference, and have the pressure stable problem.So traditional three screw pump delivery pressure is low, specific discharge is little.
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 tooth shape of screw that the purpose of this invention is to provide a kind of three screw pump, the profile of tooth of driven screw rod are single head, and initiatively the profile of tooth of screw rod is a four-head.
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 three screw pump, and screw pump is made up of two single-head screws and a four-head screw rod; The profile of tooth of every screw rod of four-head screw rod is identical, and evenly distributes along circumference, and wherein one is linked in sequence by radial alignment section ab, generalized cycloidal bc, root circle camber line cd, generalized cycloidal de, radial alignment section ef and top circle camber line fg and forms; Wherein, top circle camber line fg and root circle camber line cd are with o
1Circular arc for the center of circle; 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
2Circular arc for the center of circle; The radian of circular arc d ' e ' is four times of radian of top circle camber line fg on the four-head screw rod on the single-head screw, and the radian of circular arc a ' b ' is four times of root circle camber line cd radian on the four-head screw rod on the single-head screw; The tooth depth of described single-head screw equals the tooth depth of four-head screw rod.
Further, radial alignment section ab, the ef of described four-head screw rod also can be circular arc, cycloid or involute.
Further, the helical pitch of described four-head tooth shape of screw is four times of single-head screw.
Advantage of the present invention is: 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 four-head screw rod 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 three screw rods, and two screw rods are single-head screw, and another root screw rod is the four-head screw rod.
Fig. 1 shows the shape of four-head screw rod radial cross section of the present invention, the profile of tooth of every screw rod of four-head screw rod is identical, and evenly distribute along circumference, wherein one is linked in sequence by radial alignment section ab, generalized cycloidal bc, root circle camber line cd, generalized cycloidal de, radial alignment section ef and top circle camber line fg and forms.Wherein, top circle camber line fg and root circle camber line cd are the central point o with the four-head screw rod
1Circular arc for the center of circle; Radius and the radian of root circle camber line cd are all adjustable, the length-adjustable of radial alignment section ab and ef, and ab and ef 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 ' and root circle camber line d ' e ' are the central point o with single-head screw
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, form by 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.
When single-head screw and four-head screw rod with 4: 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 the four-head screw rod on the single-head screw on the four-head screw rod, generalized cycloidal a ' f ' and b ' c ' are respectively the conjugate curve that e point on the four-head screw rod 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 four-head screw rod and ab form on single-head screw.
The radian of circular arc d ' e ' is four times of radian of top circle camber line fg on the four-head screw rod on the single-head screw, and the radian of circular arc a ' b ' is four times of root circle camber line cd radian on the four-head screw rod on the 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 four-head screw rod and the difference of root radius) of four-head screw rod.
The helical pitch of four-head tooth shape of screw is four times of single-head screw, and the length of screw rod is slightly larger than half helical pitch of four-head screw rod, 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 four-head screw rod top circle aj and root circle cd correspondence is respectively the root circle d ' g ' 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 four-head screw rod, point b and some e correspond respectively to generalized cycloidal b ' c ' and generalized cycloidal a ' f ' on the single-head screw on the four-head screw rod, and radial alignment section ab and ef correspond respectively to envelope c ' d ' and the f ' e ' on the single-head screw on the four-head screw rod.
As shown in Figure 4, in the middle of the four-head screw rod was positioned at, two single-head screws were positioned at both sides, and when three screw rods rolled relatively, the four-head screw rod will form the space pitch curve on single-head screw, and single-head screw also can form corresponding pitch curve on the four-head screw rod.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. the tooth shape of screw of a big-flow high-pressure three screw pump, screw pump is made up of two single-head screws and a four-head screw rod; It is characterized in that,
The profile of tooth of every screw rod of four-head screw rod is identical, and evenly distributes along circumference, and wherein one is linked in sequence by radial alignment section ab, generalized cycloidal bc, root circle camber line cd, generalized cycloidal de, radial alignment section ef and top circle camber line fg and forms; Wherein, top circle camber line fg and root circle camber line cd are the central point o with the four-head screw rod
1Circular arc for the center of circle;
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
2Circular arc for the center of circle;
The radian of circular arc d ' e ' is four times of radian of top circle camber line fg on the four-head screw rod on the single-head screw, and the radian of circular arc a ' b ' is four times of root circle camber line cd radian on the four-head screw rod on the single-head screw;
The tooth depth of described single-head screw equals the tooth depth of four-head screw rod.
2. the tooth shape of screw of big-flow high-pressure three screw pump according to claim 1 is characterized in that, radial alignment section ab, the ef of described four-head screw rod are circular arc, cycloid or involute.
3. the tooth shape of screw of big-flow high-pressure three screw pump according to claim 1 is characterized in that, the helical pitch of described four-head tooth shape of screw is four times of single-head screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100609754A CN100417816C (en) | 2005-09-30 | 2005-09-30 | Screw profile for high-flow high-pressure three-screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100609754A CN100417816C (en) | 2005-09-30 | 2005-09-30 | Screw profile for high-flow high-pressure three-screw pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1743676A CN1743676A (en) | 2006-03-08 |
| CN100417816C true CN100417816C (en) | 2008-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100609754A Active CN100417816C (en) | 2005-09-30 | 2005-09-30 | Screw profile for high-flow high-pressure three-screw pump |
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| Country | Link |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110552879B (en) * | 2019-09-29 | 2024-05-24 | 陈行 | Four-screw pump |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4773837A (en) * | 1985-06-24 | 1988-09-27 | Kawasaki Jukogyo Kabushiki Kaisha | Screw pump |
| JP2589972B2 (en) * | 1984-03-28 | 1997-03-12 | ソシエテ・アノニム・デー・ベー・アー | Screw compressor |
| JPH09264277A (en) * | 1996-03-27 | 1997-10-07 | Tochigi Fuji Ind Co Ltd | Roots type fluid machine |
| CN1166869A (en) * | 1995-10-30 | 1997-12-03 | 大卫·N·肖 | Multi-rotor helical-screw compressor |
| JP2001073959A (en) * | 1999-08-31 | 2001-03-21 | Shigeyoshi Osada | Screw pump |
| 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 CNB2005100609754A patent/CN100417816C/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2589972B2 (en) * | 1984-03-28 | 1997-03-12 | ソシエテ・アノニム・デー・ベー・アー | Screw compressor |
| US4773837A (en) * | 1985-06-24 | 1988-09-27 | Kawasaki Jukogyo Kabushiki Kaisha | Screw pump |
| CN1166869A (en) * | 1995-10-30 | 1997-12-03 | 大卫·N·肖 | Multi-rotor helical-screw compressor |
| JPH09264277A (en) * | 1996-03-27 | 1997-10-07 | Tochigi Fuji Ind Co Ltd | Roots type fluid machine |
| JP2001073959A (en) * | 1999-08-31 | 2001-03-21 | Shigeyoshi Osada | Screw pump |
| 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 |
|---|---|
| CN1743676A (en) | 2006-03-08 |
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| C10 | Entry into substantive examination | ||
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Application publication date: 20060308 Assignee: Huanggong Machinery Group Assignor: Zhejiang University Contract record no.: 2015330000185 Denomination of invention: Screw profile for high-flow high-pressure three-screw pump Granted publication date: 20080910 License type: Exclusive License Record date: 20150701 |
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