CN2273787Y - Teeth like screw stem - Google Patents
Teeth like screw stem Download PDFInfo
- Publication number
- CN2273787Y CN2273787Y CN 96236524 CN96236524U CN2273787Y CN 2273787 Y CN2273787 Y CN 2273787Y CN 96236524 CN96236524 CN 96236524 CN 96236524 U CN96236524 U CN 96236524U CN 2273787 Y CN2273787 Y CN 2273787Y
- Authority
- CN
- China
- Prior art keywords
- utility
- screw
- cycloid
- model
- screw rod
- 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.)
- Expired - Lifetime
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- Rotary Pumps (AREA)
Abstract
The utility model relates to a novel screw rod for pumps of double screw rods or compressors of double The utility model changes the tooth-shaped curve and makes use of an Archimedes spiral and a cycloid envelope line using the Archimedes spiral as a baseline to replace original curve sections such as involutes, or circular arcs, etc. so that the utility model used for the pumps of double screw rods or the compressors of double screw rods has strict (complete) sealing and high volume efficiency without an interference phenomenon occurring. The utility model has the advantages of simplicity, practicality and good application effect and is the novel screw rod composed of the cycloid (B), the Archimedes spiral (A), the cycloid envelope line (B) using the Archimedes spiral as the baseline, etc.
Description
The utility model is a kind of screw rod that is used for two screw pump or double-screw compressor, belongs to the improvement technology of two screw pump or the used screw rod of double-screw compressor.
The existing screw rod that is used for two screw pump or double-screw compressor, as the involute profile screw rod, its tooth curve is by cycloid, root circle circular arc, top circle circular arc.Involute combines, and when this screw rod was used for two screw pump, the shortcoming of its existence can not reach strict (fully) sealing exactly, and volumetric efficiency is not high.
It is a kind of by changing its tooth curve that the purpose of this utility model is to provide, so that reaching strict (fully) when being used for two screw pump or double-screw compressor, it seals, the volumetric efficiency height, can not interfere phenomenon, profile of tooth is by cycloid (B), spiral of Archimedes (A) and the new screw formed with its cycloid envelope (B) that is baseline etc.
Tooth curve of the present utility model as shown in drawings, curve abcdefghij is the tooth curve on the screw rod cross section, and acg is on a diameter of top circle, and a is on top circle, c is on root circle, d, e are on root circle, and i, j are on top circle, and curve abc is a cycloid, cde is the circular arc of root circle, ija is the circular arc of top circle, and ghi is a spiral of Archimedes, and efg is to be the cycloid envelope of baseline with ghi curved section (spiral of Archimedes).
Above-mentioned screw rod can be made left handed screw, also can make right handed screw.
The utility model is by changing its tooth curve, with spiral of Archimedes and with it is that the cycloid envelope of baseline substitutes curved sections such as original involute or circular arc, so that it can reach the sealing of strict (fully) when being used for two screw pump or double-screw compressor, the volumetric efficiency height, and can not interfere phenomenon, be a kind of simple, practical, the new screw that effect is good.
Describe concrete structure of the present utility model in detail below by accompanying drawing.
Accompanying drawing is a tooth curve of the present utility model, and abcdefghij is the tooth curve on the screw rod cross section among the figure, and acg is on a diameter of top circle, a is on top circle, c is on root circle, and on the footpath, d, e are on root circle in the flank of tooth for g, i, j are on top circle, curve abc is a cycloid, and cde is the circular arc of root circle, and ija is the circular arc of top circle, ghi is a spiral of Archimedes, and efg is to be the cycloid envelope of baseline with ghi curved section (spiral of Archimedes).
The utility model can be made left handed screw, also can make right handed screw.
When the utility model was used for two screw pump or double-screw compressor, adjacent screw rod was only in the hand of spiral difference, and its tooth-shape structure is identical.
Claims (2)
1, a kind of tooth screw stem, curve abcdefghij is the tooth curve on the screw rod cross section, and a, c, g are on a diameter of top circle, and a is on top circle, c is on root circle, d, e are on root circle, and i, j is characterized in that curve abc is a cycloid on top circle, cde is the circular arc of root circle, ija is the circular arc of top circle, and ghi is a spiral of Archimedes, and efg is to be the cycloid envelope of baseline with ghi curved section (spiral of Archimedes).
2, screw rod according to claim 1 is characterized in that making left handed screw, also can make right handed screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96236524 CN2273787Y (en) | 1996-01-12 | 1996-01-12 | Teeth like screw stem |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96236524 CN2273787Y (en) | 1996-01-12 | 1996-01-12 | Teeth like screw stem |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2273787Y true CN2273787Y (en) | 1998-02-04 |
Family
ID=33912327
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96236524 Expired - Lifetime CN2273787Y (en) | 1996-01-12 | 1996-01-12 | Teeth like screw stem |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2273787Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102465871A (en) * | 2010-11-17 | 2012-05-23 | 上海格什特螺杆科技有限公司 | Screw rotor end face tooth type |
| CN102979731A (en) * | 2012-12-03 | 2013-03-20 | 西安交通大学 | Rotor profile of double-screw vacuum pump, and designing method of rotor profile |
| CN105156323A (en) * | 2015-09-10 | 2015-12-16 | 中国科学院等离子体物理研究所 | Cold press rotor |
| CN110230592A (en) * | 2019-07-30 | 2019-09-13 | 浙江博大泵业有限公司 | A kind of Quimby pump that metal screw is used with the pairing of line with rubber screw rod |
-
1996
- 1996-01-12 CN CN 96236524 patent/CN2273787Y/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102465871A (en) * | 2010-11-17 | 2012-05-23 | 上海格什特螺杆科技有限公司 | Screw rotor end face tooth type |
| CN102465871B (en) * | 2010-11-17 | 2014-11-26 | 上海格什特螺杆科技有限公司 | Screw rotor end face tooth type |
| CN102979731A (en) * | 2012-12-03 | 2013-03-20 | 西安交通大学 | Rotor profile of double-screw vacuum pump, and designing method of rotor profile |
| CN102979731B (en) * | 2012-12-03 | 2015-04-29 | 西安交通大学 | Rotor profile of double-screw vacuum pump, and designing method of rotor profile |
| CN105156323A (en) * | 2015-09-10 | 2015-12-16 | 中国科学院等离子体物理研究所 | Cold press rotor |
| CN110230592A (en) * | 2019-07-30 | 2019-09-13 | 浙江博大泵业有限公司 | A kind of Quimby pump that metal screw is used with the pairing of line with rubber screw rod |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: PATENTEE; FROM: GUANGDONG UNIVERSITY OF TECHNOLOGY TO: SOUTH CHINA UNIVERSITY OF TECHNOLOGY |
|
| CP03 | Change of name, title or address |
Address after: 510641 Guangzhou city Tianhe District Wushan Patentee after: South China University of Technology Address before: 510643 Guangzhou Wushan Wushan campus of Guangdong University of Technology Patentee before: Guangdong University of Technology |
|
| AV01 | Patent right actively abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |