ZA935312B - Pair of conveyor screws for rotating positive-displacement pumps - Google Patents
Pair of conveyor screws for rotating positive-displacement pumpsInfo
- Publication number
- ZA935312B ZA935312B ZA935312A ZA935312A ZA935312B ZA 935312 B ZA935312 B ZA 935312B ZA 935312 A ZA935312 A ZA 935312A ZA 935312 A ZA935312 A ZA 935312A ZA 935312 B ZA935312 B ZA 935312B
- Authority
- ZA
- South Africa
- Prior art keywords
- rotor
- pair
- displacement pumps
- flank
- reversal point
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/082—Details specially related to intermeshing engagement type pumps
- F04C18/084—Toothed wheels
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
The invention relates to a pair of conveyor worms for rotary positive-displacement pumps, the conveyor worms of which, which are formed as a rotor and counter-rotor, rotate contactlessly in the drilling and the sides at the same speed (worm-drive pump), form loss gaps between them and have the same throat depth and pitch and symmetrical flank profiles on each side, made up with respect to their land height of a tooth base beneath the flank profile reversal point (q) and a tooth head thereabove. To provide an improvement it is proposed that the height of the loss gap (c) determined by the profile in the axial section on the pitch circle can be kept constant for a given rotor diameter (DK) by shifting the flank profile reversal point (q) as a function of a technically attainable rotor rise (H).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4224969A DE4224969C1 (en) | 1992-07-29 | 1992-07-29 | Feed screw pair for rotating positive displacement pumps |
Publications (1)
Publication Number | Publication Date |
---|---|
ZA935312B true ZA935312B (en) | 1994-02-10 |
Family
ID=6464331
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ZA935312A ZA935312B (en) | 1992-07-29 | 1993-07-22 | Pair of conveyor screws for rotating positive-displacement pumps |
Country Status (10)
Country | Link |
---|---|
EP (1) | EP0653021B1 (en) |
JP (1) | JPH07509295A (en) |
CN (1) | CN1042259C (en) |
AT (1) | ATE139304T1 (en) |
CA (1) | CA2141455A1 (en) |
DE (1) | DE4224969C1 (en) |
ES (1) | ES2089828T3 (en) |
NO (1) | NO306076B1 (en) |
WO (1) | WO1994003730A1 (en) |
ZA (1) | ZA935312B (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1026399A1 (en) | 1999-02-08 | 2000-08-09 | Ateliers Busch S.A. | Twin feed screw |
DE19924616C2 (en) * | 1999-05-28 | 2001-04-19 | Bornemann J H Gmbh | Process for the production of rotors |
DE19941787B4 (en) * | 1999-09-02 | 2011-06-16 | Leybold Vakuum Gmbh | Screw vacuum pump with screw flights with changing pitch |
DE10129341A1 (en) * | 2001-06-19 | 2003-01-02 | Ralf Steffens | Profile contour of a spindle pump |
ES2295340T3 (en) * | 2001-08-27 | 2008-04-16 | Arthur Vanmoor | FLUID DISPLACEMENT PUMP WITH COUNTERPRESSURE BUMPER. |
DE10259444B3 (en) * | 2002-12-19 | 2004-04-15 | Joh. Heinr. Bornemann Gmbh | Conveyor screw for screw type pump has asymmetrical rotor profile for reduced profile-dependent flank gaps, with convex flank section for increased sealing surface |
CN100379993C (en) * | 2005-12-08 | 2008-04-09 | 无锡压缩机股份有限公司 | Oil-free screw compressor rotor clearance structure |
JP6679158B2 (en) * | 2015-10-30 | 2020-04-15 | 蛇の目ミシン工業株式会社 | Feed dog adjusting mechanism and sewing machine equipped with the adjusting mechanism |
CN114483575B (en) * | 2022-02-08 | 2024-05-03 | 黄山黄泵双螺杆科技有限公司 | Twin screw pump for transporting fluids of high specific gravity |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB254986A (en) * | 1925-10-06 | 1926-07-15 | Alexander Johan Mollinger | Improvements in or relating to screw pumps |
DE594691C (en) * | 1933-01-04 | 1934-03-21 | Aeg | Screw compressor, consisting of right- and left-handed, mutually engaging screws coupled by cogwheels |
US3289600A (en) * | 1964-03-13 | 1966-12-06 | Joseph E Whitfield | Helically threaded rotors for screw type pumps, compressors and similar devices |
GB2182393A (en) * | 1985-11-04 | 1987-05-13 | Ngk Insulators Ltd | Intermeshing screw pump |
-
1992
- 1992-07-29 DE DE4224969A patent/DE4224969C1/en not_active Expired - Fee Related
-
1993
- 1993-07-03 CA CA002141455A patent/CA2141455A1/en not_active Abandoned
- 1993-07-03 AT AT93914601T patent/ATE139304T1/en not_active IP Right Cessation
- 1993-07-03 WO PCT/DE1993/000595 patent/WO1994003730A1/en active IP Right Grant
- 1993-07-03 JP JP6504876A patent/JPH07509295A/en active Pending
- 1993-07-03 ES ES93914601T patent/ES2089828T3/en not_active Expired - Lifetime
- 1993-07-03 EP EP93914601A patent/EP0653021B1/en not_active Expired - Lifetime
- 1993-07-22 ZA ZA935312A patent/ZA935312B/en unknown
- 1993-07-29 CN CN93116899A patent/CN1042259C/en not_active Expired - Fee Related
-
1995
- 1995-01-27 NO NO950310A patent/NO306076B1/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
ES2089828T3 (en) | 1996-10-01 |
EP0653021B1 (en) | 1996-06-12 |
CN1088666A (en) | 1994-06-29 |
NO306076B1 (en) | 1999-09-13 |
DE4224969C1 (en) | 1993-09-30 |
WO1994003730A1 (en) | 1994-02-17 |
CN1042259C (en) | 1999-02-24 |
NO950310L (en) | 1995-03-24 |
JPH07509295A (en) | 1995-10-12 |
ATE139304T1 (en) | 1996-06-15 |
CA2141455A1 (en) | 1994-02-17 |
NO950310D0 (en) | 1995-01-27 |
EP0653021A1 (en) | 1995-05-17 |
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