CN203756515U - Screws with novel geometric tooth form of two-screw pump - Google Patents
Screws with novel geometric tooth form of two-screw pump Download PDFInfo
- Publication number
- CN203756515U CN203756515U CN201320733870.0U CN201320733870U CN203756515U CN 203756515 U CN203756515 U CN 203756515U CN 201320733870 U CN201320733870 U CN 201320733870U CN 203756515 U CN203756515 U CN 203756515U
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- CN
- China
- Prior art keywords
- line
- arc
- tooth
- molded line
- envelope
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- Expired - Fee Related
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Abstract
The utility model discloses screws with a novel geometric tooth form of a two-screw pump. The tooth form of a driving screw is identical to that of a driven screw, the rotating direction of the driving screw is different from that of the driven screw, both the driving screw and the driven screw are respectively of the single-head non-symmetric tooth form, and a tooth-shaped molded line of the end surface of the driving screw is formed by connecting a convex-surface tooth profile molded line df, a tooth-bottom tooth profile molded line dc and a concave-surface tooth profile molded line ac, wherein the convex-surface tooth profile molded line df is formed by connecting an inner arc de and an outer arc enveloping line ef in a smooth transitional manner, and the concave-surface tooth profile molded line ac is formed by connecting an outer arc ab and an inner arc enveloping line bc in a smooth transitional manner. According to the utility model, the strength of the screws can be greatly improved, a contact line can be shortened, the conveying capacity of the two-screw pump can be improved, and the two-screw pump with the geometric tooth form is suitable for conveying of media containing certain solids and particularly suitable for oil and gas mixed conveying in an oil field; by controlling the size of the arc of the geometric tooth form, the gas content of the two-screw pump with the geometric tooth form can be improved.
Description
Technical field
The utility model relates to Course Exercise in Machinery Elements Design processing technique field, particularly a kind of dual-screw pump screw with new how much profiles of tooth.
Background technique
In the prior art, the novel tooth forms that adopt cycloids to form two screw pump more, the also profile of tooth of useful arc transition, but the profile of tooth being meshed with transition arc is again cycloid, so just can not form engagement truly, can bring engagement steadily and Line of contact discontinuous; Though another dual-screw pump screw of putting this cycloidal tooth profile composition can form approximate Seal cage, as patent CN99201251.1, its contact line length has more cusp, easy to wear, the two screw pump that it in fact still not exclusively seals.
Model utility content
The purpose of this utility model is to provide a kind of dual-screw pump screw with new how much profiles of tooth.
The purpose of this utility model is implemented by following technological scheme, a kind of dual-screw pump screw with new how much profiles of tooth, its driving and driven tooth shape of screw is identical, but rotation direction is different, be single head asymmetric tooth, initiatively screw rod contrate tooth profile molded line by convex surface flank profil molded line df, tooth at the bottom of flank profil molded line dc and concave surface flank profil molded line ac three-segment type line connect and compose, convex surface flank profil molded line df is by interior circular arc de and external arc envelope ef is smooth excessively connects and composes, and concave surface flank profil molded line ac is by external arc ab and interior arc envelope line bc is smooth excessively connects and composes;
Driven screw rod contrate tooth profile molded line is by convex surface flank profil molded line d
1f
1, flank profil molded line d at the bottom of tooth
1c
1with concave surface flank profil molded line a
1c
1three-segment type line connects and composes, convex surface flank profil molded line d
1f
1by interior circular arc d
1e
1with external arc envelope e
1f
1smoothly excessively connect and compose concave surface flank profil molded line a
1c
1by external arc a
1b
1with interior arc envelope line b
1c
1smoothly excessively connect and compose;
External arc envelope ef is interior circular arc d
1e
1the arc envelope line that envelope forms, interior arc envelope line bc is external arc a
1b
1arc envelope line, external arc envelope e
1f
1for the arc envelope line that interior circular arc de envelope forms, interior arc envelope line b
1c
1arc envelope line for external arc ab.
Interior circular arc de is less than 1/4 circular arc, and the radius of interior circular arc de is not more than the poor of circle radius at the bottom of Pitch radius and tooth.
External arc ab is less than 1/4 circular arc, and the radius of external arc ab is not more than the poor of Outside radius and Pitch radius.
The utility model has the advantage of, the utility model can improve the intensity of screw rod greatly, shorten Line of contact, improve the conveying capacity of two screw pump, the two screw pump of simultaneously this how much profiles of tooth is more suitable for carrying the medium that contains a fixed solid, be particularly suitable for oilfield mixed-transmission double screw pump simultaneously, by controlling the size of how much profile of tooth circular arcs, can improve the gas content of this how much profile of tooth two screw pumps.
Accompanying drawing explanation
Fig. 1 is how much profile of tooth figure of the utility model screw rod end face.
Fig. 2 is that how much profiles of tooth of the utility model screw rod form schematic diagram.
Embodiment: a kind of dual-screw pump screw with new how much profiles of tooth, its driving and driven tooth shape of screw is identical, but rotation direction is different, be single head asymmetric tooth, initiatively screw rod contrate tooth profile molded line by convex surface flank profil molded line df, tooth at the bottom of flank profil molded line dc and concave surface flank profil molded line ac three-segment type line connect and compose, convex surface flank profil molded line df is by interior circular arc de and external arc envelope ef is smooth excessively connects and composes, and concave surface flank profil molded line ac is by external arc ab and interior arc envelope line bc is smooth excessively connects and composes;
Driven screw rod contrate tooth profile molded line is by convex surface flank profil molded line d
1f
1, flank profil molded line d at the bottom of tooth
1c
1with concave surface flank profil molded line a
1c
1three-segment type line connects and composes, convex surface flank profil molded line d
1f
1by interior circular arc d
1e
1with external arc envelope e
1f
1smoothly excessively connect and compose concave surface flank profil molded line a
1c
1by external arc a
1b
1with interior arc envelope line b
1c
1smoothly excessively connect and compose;
External arc envelope ef is interior circular arc d
1e
1the arc envelope line that envelope forms, interior arc envelope line bc is external arc a
1b
1arc envelope line, external arc envelope e
1f
1for the arc envelope line that interior circular arc de envelope forms, interior arc envelope line b
1c
1arc envelope line for external arc ab.
Interior circular arc de is less than 1/4 circular arc, and the radius of interior circular arc de is not more than the poor of circle radius at the bottom of Pitch radius and tooth.
External arc ab is less than 1/4 circular arc, and the radius of external arc ab is not more than the poor of Outside radius and Pitch radius.
Claims (2)
1. a dual-screw pump screw with new how much profiles of tooth, it is main, driven tooth shape of screw is identical, but rotation direction is different, be single head asymmetric tooth, it is characterized in that, initiatively screw rod contrate tooth profile molded line is by convex surface flank profil molded line df, at the bottom of tooth, flank profil molded line dc and concave surface flank profil molded line ac three-segment type line connect and compose, convex surface flank profil molded line df is connected and composed by interior circular arc de and external arc envelope ef smooth transition, concave surface flank profil molded line ac is connected and composed by external arc ab and interior arc envelope line bc smooth transition, external arc ab is less than 1/4 circular arc, the radius of external arc ab is not more than the poor of Outside radius and Pitch radius,
Driven screw rod contrate tooth profile molded line is by convex surface flank profil molded line d
1f
1, flank profil molded line d at the bottom of tooth
1c
1with concave surface flank profil molded line a
1c
1three-segment type line connects and composes, convex surface flank profil molded line d
1f
1by interior circular arc d
1e
1with external arc envelope e
1f
1smoothly excessively connect and compose concave surface flank profil molded line a
1c
1by external arc a
1b
1with interior arc envelope line b
1c
1smooth transition connects and composes;
External arc envelope ef is interior circular arc d
1e
1the arc envelope line that envelope forms, interior arc envelope line bc is external arc a
1b
1arc envelope line, external arc envelope e
1f
1for the arc envelope line that interior circular arc de envelope forms, interior arc envelope line b
1c
1arc envelope line for external arc ab.
2. a kind of dual-screw pump screw with new how much profiles of tooth according to claim 1, is characterized in that, interior circular arc de is less than 1/4 circular arc, and the radius of interior circular arc de is not more than the poor of circle radius at the bottom of Pitch radius and tooth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320733870.0U CN203756515U (en) | 2013-11-19 | 2013-11-19 | Screws with novel geometric tooth form of two-screw pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320733870.0U CN203756515U (en) | 2013-11-19 | 2013-11-19 | Screws with novel geometric tooth form of two-screw pump |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203756515U true CN203756515U (en) | 2014-08-06 |
Family
ID=51251797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320733870.0U Expired - Fee Related CN203756515U (en) | 2013-11-19 | 2013-11-19 | Screws with novel geometric tooth form of two-screw pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203756515U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108443145A (en) * | 2018-05-22 | 2018-08-24 | 天津华科螺杆泵技术有限公司 | A kind of twin-feed spiral screw rod and Quimby pump and dry vacuum screw pump using the screw rod |
| CN109209864A (en) * | 2017-07-05 | 2019-01-15 | 袁道幸 | A kind of novel tooth form based on mixed transportation of oil and gas Quimby pump |
-
2013
- 2013-11-19 CN CN201320733870.0U patent/CN203756515U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109209864A (en) * | 2017-07-05 | 2019-01-15 | 袁道幸 | A kind of novel tooth form based on mixed transportation of oil and gas Quimby pump |
| CN108443145A (en) * | 2018-05-22 | 2018-08-24 | 天津华科螺杆泵技术有限公司 | A kind of twin-feed spiral screw rod and Quimby pump and dry vacuum screw pump using the screw rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140806 Termination date: 20201119 |