GB1549546A - Meshing-screw type rotary hydraulic machine - Google Patents
Meshing-screw type rotary hydraulic machineInfo
- Publication number
- GB1549546A GB1549546A GB4122477A GB4122477A GB1549546A GB 1549546 A GB1549546 A GB 1549546A GB 4122477 A GB4122477 A GB 4122477A GB 4122477 A GB4122477 A GB 4122477A GB 1549546 A GB1549546 A GB 1549546A
- Authority
- GB
- United Kingdom
- Prior art keywords
- pressure
- piston
- area
- pump
- low
- 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
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
- F04C15/00—Component parts, details or accessories of machines, pumps or pumping installations, not provided for in groups F04C2/00 - F04C14/00
- F04C15/0042—Systems for the equilibration of forces acting on the machines or pump
-
- 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
- F04C2240/00—Components
- F04C2240/60—Shafts
- F04C2240/605—Shaft sleeves or details thereof
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Details Of Reciprocating Pumps (AREA)
- Hydraulic Motors (AREA)
- Rotary Pumps (AREA)
- Rotary-Type Compressors (AREA)
- Reciprocating Pumps (AREA)
- Support Of The Bearing (AREA)
Abstract
The machine can work as a pump or a motor. In the first case, the fluid flows from the low-pressure side to the high-pressure side. In the second case it is the other way round. The pressure difference between high pressure and low pressure attempts to push the conveyor worm (1) towards the low-pressure side (65). In order to compensate for this axial thrust, the conveyor worm (1) is provided with a compensation piston (2). In addition there are frictional forces which act in an axial direction. In a motor these forces act in the same direction as the pressure force due to the pressure difference; in a pump they act in the opposite direction. In the case of the pump, the piston area should be chosen to be smaller, and in the case of the motor to be greater than would be required for pressure equalisation. So as not to have to provide the conveyor worm (1) with different pistons (for pump or motor mode), the free end of the piston is given a smaller area (6, d2) than would be required for pressure equalisation, said smaller area being acted upon by the pressure (65) which prevails at the other end of the conveyor worm (1). The piston (2) further has a second area (d1) which is acted upon by an intermediate pressure between the high pressure (67) and the low pressure (65). The sum of the smaller area (6, d2) and the second area (d1) is greater than the area which would be required for pressure equalisation. The intermediate pressure arises in a chamber (9) which is bounded by piston (2) and its bearing (3) and which communicates with the high pressure and low pressure side (67, 65) via leak points (64, 66). The throttle effect of these leak points changes as the piston (2) moves. <IMAGE>
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7611475A SE414813B (en) | 1976-10-15 | 1976-10-15 | HYDRAULIC MACHINE |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1549546A true GB1549546A (en) | 1979-08-08 |
Family
ID=20329149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB4122477A Expired GB1549546A (en) | 1976-10-15 | 1977-10-04 | Meshing-screw type rotary hydraulic machine |
Country Status (9)
Country | Link |
---|---|
JP (1) | JPS5349307A (en) |
CH (1) | CH623894A5 (en) |
DE (1) | DE2745646A1 (en) |
FR (1) | FR2367929A1 (en) |
GB (1) | GB1549546A (en) |
IT (1) | IT1091184B (en) |
NL (1) | NL7711023A (en) |
PL (1) | PL112857B1 (en) |
SE (1) | SE414813B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6551084B2 (en) | 1999-11-11 | 2003-04-22 | Svenska Rotor Maskiner Ab | Screw rotor machine having means for axially biasing at least one of the rotors |
US10975864B2 (en) | 2017-09-21 | 2021-04-13 | Leistritz Pumpen Gmbh | Screw pump |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2828348A1 (en) * | 1978-06-28 | 1980-01-10 | Allweiler Ag | SCREW MACHINE |
JPS63188477A (en) * | 1987-01-29 | 1988-08-04 | Kyocera Corp | Guide and electrification member for welding |
DE19508561C2 (en) * | 1995-03-10 | 2003-06-12 | Allweiler Ag | Screw Pump |
DE102010005900A1 (en) * | 2010-01-27 | 2011-07-28 | Robert Bosch GmbH, 70469 | Hydraulic gear machine |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE406958B (en) * | 1976-04-27 | 1979-03-05 | Imo Industri Ab | HYDRAULIC SCREWDRIVER |
-
1976
- 1976-10-15 SE SE7611475A patent/SE414813B/en not_active IP Right Cessation
-
1977
- 1977-10-04 CH CH1211677A patent/CH623894A5/en not_active IP Right Cessation
- 1977-10-04 GB GB4122477A patent/GB1549546A/en not_active Expired
- 1977-10-07 NL NL7711023A patent/NL7711023A/en not_active Application Discontinuation
- 1977-10-07 IT IT6923677A patent/IT1091184B/en active
- 1977-10-11 DE DE19772745646 patent/DE2745646A1/en active Granted
- 1977-10-14 PL PL20151777A patent/PL112857B1/en unknown
- 1977-10-14 JP JP12338877A patent/JPS5349307A/en active Granted
- 1977-10-14 FR FR7731666A patent/FR2367929A1/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6551084B2 (en) | 1999-11-11 | 2003-04-22 | Svenska Rotor Maskiner Ab | Screw rotor machine having means for axially biasing at least one of the rotors |
US10975864B2 (en) | 2017-09-21 | 2021-04-13 | Leistritz Pumpen Gmbh | Screw pump |
Also Published As
Publication number | Publication date |
---|---|
SE414813B (en) | 1980-08-18 |
NL7711023A (en) | 1978-04-18 |
IT1091184B (en) | 1985-06-26 |
JPS5349307A (en) | 1978-05-04 |
CH623894A5 (en) | 1981-06-30 |
JPS623281B2 (en) | 1987-01-24 |
PL201517A1 (en) | 1978-05-22 |
FR2367929A1 (en) | 1978-05-12 |
DE2745646A1 (en) | 1978-04-20 |
PL112857B1 (en) | 1980-11-29 |
FR2367929B3 (en) | 1980-07-04 |
SE7611475L (en) | 1978-04-16 |
DE2745646C2 (en) | 1989-12-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |