EP0866918A1 - Twin feed screw - Google Patents
Twin feed screwInfo
- Publication number
- EP0866918A1 EP0866918A1 EP96920677A EP96920677A EP0866918A1 EP 0866918 A1 EP0866918 A1 EP 0866918A1 EP 96920677 A EP96920677 A EP 96920677A EP 96920677 A EP96920677 A EP 96920677A EP 0866918 A1 EP0866918 A1 EP 0866918A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flank
- core
- arc
- pct
- twin
- 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.)
- Granted
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
-
- 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
-
- 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
- F04C18/12—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 of other than internal-axis type
- F04C18/14—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 of other than internal-axis type with toothed rotary pistons
- F04C18/16—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 of other than internal-axis type with toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
Definitions
- the invention relates to the profile geometries of twin feed screws for axially parallel, off-axis operation in pumps with a pilot gear for guiding the screws in opposite directions.
- Profile geometry, wrap angle, pitch, gap width, medium control and speed determine the pump parameters such as flow rate, efficiency, final pressure, leak rate, temperature, noise and the manufacturing effort.
- SRM profile The geometries from SRM, Sweden, known as the SRM profile, are suitable for the construction of fast-rotating twin-feed screws with unequal profiles in multiple threads and small wrap angles for pumps with medium final pressure.
- the screws are manufactured with wrap angles of 1080 °, 1440 °, 1800 °, etc. and have the same end profiles.
- the outlet is controlled at the end by one of the screws with an opening along the second, involute-shaped profile flank. While maintaining the working principle of the axially moving work cells with twice the length of the slope, the profile geometry should be redesigned and defined in terms of modern series production and an improvement in the volumetric efficiency, the dynamics and the control of the medium should be achieved.
- This object is achieved according to the invention in the case of twin-conveying screws with profile contours made of an arc of a core, a cycloid-shaped hollow flank, an outer circular arc and a second flank in that, in deviation from the known, the second flank 6, called the flank flank, connects to the core circular arc 4 at the base without kinks and that the flank 6 is at least a central, non-rising area, the saddle 7, which connects the partial side flanks thus formed, the inner flank 8 and the outer flank 9 without kinks.
- Fig.l A set of twin feed screws in a single version with pilot gear
- Fig.2 An execution of the profile geometry
- Fig. 3 An embodiment of the twin feed screws in a section along the line AA of Fig. 1, installed in a housing, shown on the same scale as Fig.l.
- Fig. 4 An embodiment of the feed screws in an axial section, in sections.
- the feed screws 1, 2 (Fig.l and 3). Wrap angle of approx. 1600 ° and the same end profiles with a jacket flank that is composed of several flank partial curves:
- the saddle 7 (Fig. 1 and 2) is designed in a circular arc with a radius the size of half the center distance and corresponds in installation to the saddle of the counter screw .
- the inner flank 8 (FIG. 2) consists of an eccentric circular arc, which here is called flank circle 10 (FIG. 2), which adjoins the saddle 7 without a kink, and an extended cycloid, the root cycloid 11 (FIG. 2), which connects without kinking the core arc 4 (Fig.2 and 3).
- the center of the flank circle of the counter screw moves with respect to the profile under consideration on a shortened epicycloid 12 (FIG. 2), the inner parallel curve of which, at a distance from the flank circle radius f, is the outer flank 9 (FIG. 2) of the profile under consideration.
- the hollow-side cycloid 5 (FIGS. 2 and 3) is calculated with a and b.
- the root cycloid 11 is generated by the top corner at the joint outer circle / outer flank of the counter profile and is congruent to part of the hollow flank 5 due to the same levers a, b.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rotary Pumps (AREA)
- Macromolecular Compounds Obtained By Forming Nitrogen-Containing Linkages In General (AREA)
- Polyesters Or Polycarbonates (AREA)
- Gear Transmission (AREA)
- Addition Polymer Or Copolymer, Post-Treatments, Or Chemical Modifications (AREA)
- Formation And Processing Of Food Products (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Details And Applications Of Rotary Liquid Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH3488/95 | 1995-12-11 | ||
CH348895 | 1995-12-11 | ||
CH348895 | 1995-12-11 | ||
CH362895 | 1995-12-21 | ||
CH362895 | 1995-12-21 | ||
CH3628/95 | 1995-12-21 | ||
PCT/CH1996/000251 WO1997021926A1 (en) | 1995-12-11 | 1996-07-08 | Twin feed screw |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0866918A1 true EP0866918A1 (en) | 1998-09-30 |
EP0866918B1 EP0866918B1 (en) | 1999-12-29 |
Family
ID=25693146
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96920677A Expired - Lifetime EP0866918B1 (en) | 1995-12-11 | 1996-07-08 | Twin feed screw |
Country Status (15)
Country | Link |
---|---|
US (1) | US6129535A (en) |
EP (1) | EP0866918B1 (en) |
JP (1) | JP4057059B2 (en) |
KR (1) | KR100384926B1 (en) |
CN (1) | CN1089409C (en) |
AT (1) | ATE188277T1 (en) |
AU (1) | AU720108B2 (en) |
CA (1) | CA2240169C (en) |
CZ (1) | CZ289348B6 (en) |
DE (1) | DE59604068D1 (en) |
ES (1) | ES2140867T3 (en) |
NO (1) | NO982675L (en) |
PT (1) | PT866918E (en) |
SK (1) | SK281393B6 (en) |
WO (1) | WO1997021926A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6702558B2 (en) | 2000-07-25 | 2004-03-09 | Ateliers Busch Sa | Twin screw rotors and displacement machines containing the same |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19725462A1 (en) * | 1997-06-16 | 1998-12-24 | Storz Endoskop Gmbh | Medical gear pump for suction and rinsing |
DE59811390D1 (en) * | 1998-10-23 | 2004-06-17 | Busch Sa Atel | Twins conveyor screw rotors |
EP1026399A1 (en) | 1999-02-08 | 2000-08-09 | Ateliers Busch S.A. | Twin feed screw |
JP4823455B2 (en) * | 1999-06-14 | 2011-11-24 | ウェイ ショウーン | Fluid machine provided with a gear and a pair of engagement gears using the gear |
JP4282867B2 (en) * | 2000-03-15 | 2009-06-24 | ナブテスコ株式会社 | Screw rotor and screw machine |
CN100392249C (en) * | 2005-01-31 | 2008-06-04 | 浙江大学 | Arc screw tooth shape of large flow double screw pump |
CN100400875C (en) * | 2005-01-31 | 2008-07-09 | 浙江大学 | Cycloidal screw tooth form of large flow double screw pump |
CN100460681C (en) * | 2005-01-31 | 2009-02-11 | 浙江大学 | Involute line screw tooth shape of large flow double screw pump |
US7625191B2 (en) * | 2005-02-16 | 2009-12-01 | Ateliers Busch Sa | Rotary displacement machines having rotors of asymmetrical profile |
CN103195716B (en) * | 2013-05-07 | 2015-09-02 | 巫修海 | A kind of tooth screw stem molded line |
CN105191474B (en) * | 2013-05-10 | 2019-04-19 | 株式会社Kt | Method for alleviating the hidden node problem in wireless local area network (WLAN) system |
DE102014105882A1 (en) | 2014-04-25 | 2015-11-12 | Kaeser Kompressoren Se | Rotor pair for a compressor block of a screw machine |
KR102294105B1 (en) | 2019-12-09 | 2021-08-25 | 김봉군 | Delivering of materials for High-Rise Building construction and apparatus thereof |
KR102282062B1 (en) | 2019-12-09 | 2021-07-26 | 김봉군 | Delivering of construction materials and apparatus thereof |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB746628A (en) * | 1953-04-06 | 1956-03-14 | Dresser Ind | Improvements in pumps or motors of the meshing screw type |
SU956840A1 (en) * | 1981-02-27 | 1982-09-07 | Предприятие П/Я А-3884 | Screw compressor |
GB2165890B (en) * | 1984-10-24 | 1988-08-17 | Stothert & Pitt Plc | Improvements in pumps |
JPS62291486A (en) * | 1986-06-12 | 1987-12-18 | Taiko Kikai Kogyo Kk | Screw compressor |
JP2904719B2 (en) * | 1995-04-05 | 1999-06-14 | 株式会社荏原製作所 | Screw rotor, method for determining cross-sectional shape of tooth profile perpendicular to axis, and screw machine |
-
1996
- 1996-07-08 US US09/077,965 patent/US6129535A/en not_active Expired - Fee Related
- 1996-07-08 KR KR10-1998-0704358A patent/KR100384926B1/en not_active IP Right Cessation
- 1996-07-08 CN CN96199627A patent/CN1089409C/en not_active Expired - Fee Related
- 1996-07-08 WO PCT/CH1996/000251 patent/WO1997021926A1/en active IP Right Grant
- 1996-07-08 DE DE59604068T patent/DE59604068D1/en not_active Expired - Fee Related
- 1996-07-08 ES ES96920677T patent/ES2140867T3/en not_active Expired - Lifetime
- 1996-07-08 CA CA002240169A patent/CA2240169C/en not_active Expired - Fee Related
- 1996-07-08 JP JP52157797A patent/JP4057059B2/en not_active Expired - Fee Related
- 1996-07-08 CZ CZ19981771A patent/CZ289348B6/en not_active IP Right Cessation
- 1996-07-08 PT PT96920677T patent/PT866918E/en unknown
- 1996-07-08 SK SK781-98A patent/SK281393B6/en unknown
- 1996-07-08 AT AT96920677T patent/ATE188277T1/en not_active IP Right Cessation
- 1996-07-08 EP EP96920677A patent/EP0866918B1/en not_active Expired - Lifetime
- 1996-07-08 AU AU61862/96A patent/AU720108B2/en not_active Ceased
-
1998
- 1998-06-10 NO NO982675A patent/NO982675L/en not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9721926A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6702558B2 (en) | 2000-07-25 | 2004-03-09 | Ateliers Busch Sa | Twin screw rotors and displacement machines containing the same |
Also Published As
Publication number | Publication date |
---|---|
AU720108B2 (en) | 2000-05-25 |
NO982675D0 (en) | 1998-06-10 |
KR100384926B1 (en) | 2003-08-21 |
CN1089409C (en) | 2002-08-21 |
JP2000501810A (en) | 2000-02-15 |
CZ177198A3 (en) | 2000-03-15 |
CZ289348B6 (en) | 2002-01-16 |
DE59604068D1 (en) | 2000-02-03 |
CN1207795A (en) | 1999-02-10 |
PT866918E (en) | 2000-04-28 |
CA2240169C (en) | 2007-12-04 |
US6129535A (en) | 2000-10-10 |
ATE188277T1 (en) | 2000-01-15 |
EP0866918B1 (en) | 1999-12-29 |
KR19990072057A (en) | 1999-09-27 |
AU6186296A (en) | 1997-07-03 |
WO1997021926A1 (en) | 1997-06-19 |
SK78198A3 (en) | 1999-02-11 |
ES2140867T3 (en) | 2000-03-01 |
JP4057059B2 (en) | 2008-03-05 |
SK281393B6 (en) | 2001-03-12 |
NO982675L (en) | 1998-08-07 |
CA2240169A1 (en) | 1997-06-19 |
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