EP0642628A1 - Double pump. - Google Patents
Double pump.Info
- Publication number
- EP0642628A1 EP0642628A1 EP93910004A EP93910004A EP0642628A1 EP 0642628 A1 EP0642628 A1 EP 0642628A1 EP 93910004 A EP93910004 A EP 93910004A EP 93910004 A EP93910004 A EP 93910004A EP 0642628 A1 EP0642628 A1 EP 0642628A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump
- ring insert
- radial piston
- double
- ring
- 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
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
- F04B23/08—Combinations of two or more pumps the pumps being of different types
- F04B23/10—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type
- F04B23/103—Combinations of two or more pumps the pumps being of different types at least one pump being of the reciprocating positive-displacement type being a radial piston pump
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
- F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
- F04B1/053—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement with actuating or actuated elements at the inner ends of the cylinders
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
- F04B23/08—Combinations of two or more pumps the pumps being of different types
- F04B23/12—Combinations of two or more pumps the pumps being of different types at least one pump being of the rotary-piston positive-displacement type
Definitions
- the invention relates to a double pump, which consists of a radial piston pump combined into a pump unit and a vane pump.
- a common shaft drives the radial piston pump arranged on the input side and the vane pump located on the shaft end.
- the housing of the radial piston pump encompasses an annular insert containing the delivery pistons.
- a pump package consisting of rotor, vanes and cam ring seals against end plates on both sides of the pump package.
- Such double pumps are often used in motor vehicles which are driven by the vehicle engine via a V-belt.
- the radial piston pump preferably supplies a level control and the vane pump an auxiliary power steering.
- a double pump of this type is already known from DE-OS 41 03 986.
- This version has a housing for accommodating the radial piston pump, which at the same time forms an end plate for the pump package of the vane pump.
- An opening in the housing receives the ring insert for the delivery piston.
- a housing cover closes this opening.
- there are at least two separation points namely the separation point on the housing cover and the separation point between the end plate of the pot-shaped housing and the pump package of the vane pump. Sealing rings are inserted in these two separation points.
- the invention has for its object to simplify this double pump structurally so that a compact and weight-saving design results.
- a housing separation point should be avoided.
- the ring insert containing the delivery pistons and the end plate for the vane pump facing the radial piston pump form a common component.
- the ring insert together with the end plate can be inserted into the housing of the radial piston pump from one side and there is only one separating point to be sealed between the two pumps.
- the end plate molded onto the ring insert is no longer part of the housing, as in the prior art, so that it can be made thinner. This reduces the axial length of the double pump.
- the end plate of the ring insert has a bore for mounting the shaft. Since a special bearing bush can be omitted, this storage is less expensive.
- the ring insert also forms a contact surface for the shaft in the area of the eccentric.
- a special thrust ring can also be saved here.
- a radial piston pump 1 and a vane pump 2 are connected to form a structural unit by screws 3 distributed on a housing end face.
- the piston pump 1 has a housing 4 with a large opening 5.
- a shaft 6 extends through the housing 4 into a further housing 7 of the vane pump.
- a ring insert 8 is fitted, which contains a plurality of cylinder bores 10 for receiving delivery pistons 11.
- An eccentric 12 fixed on the shaft 6 sets the delivery pistons 11 in lifting movements.
- inlet bores 13 are immersed in a suction chamber 14 during the suction stroke, so that their interior spaces are filled with oil.
- a band valve 15 assigned to all of the delivery pistons 11 opens, which bulges up from a seat above an outlet bore 16 that ejects oil.
- An annular groove 17 is connected to an outlet 18 of a first consumer.
- two sealing rings 19 and 19A are seated in the ring insert 8 to prevent high pressure.
- a rotor 20 is seated on the end of the shaft in a known manner, in the slots of which vanes 21 of the vane pump 2 are guided to slide along a cam ring 22.
- the rotor 20, the vanes 21 and the cam ring 22 form a so-called pump package.
- the pump package 20, 21, 22 seals laterally against an end face 23 and against an end plate 24.
- the radial piston pump and the vane pump draw from a common suction port 25.
- the oil passes through a bore 26, a channel 27 and an annular groove 28 in between the Wings 21 lying delivery chambers.
- the suction connection 25 is also connected to the suction space 14 via channels 30 and 30A in a different sectional plane, in which the delivery pistons 11 with the inlet bores 13 are immersed.
- a flow control valve 31 is concentric to the shaft 6 behind the end plate 24. This flow control valve 31 regulates in a known manner part of the flow rate of the vane pump increasing with the speed into the bore 26 connected to the suction port 25.
- the useful current flows from a pressure chamber 32 via a further outlet 33 to a second consumer.
- an end plate forming the end face 23 is molded onto the ring insert 8.
- the end face 23, together with the housing 4, creates the only separating joint to the vane pump 2.
- a concentric bore 36 in the ring insert 8 supports the shaft 6 without an additional bearing bush.
- the shaft 6 is axially supported on a contact surface 38 of the ring insert 8.
- the additional installation of an otherwise usual contact disk can be dispensed with.
- the ring insert 8 is preferably made of a material with good sliding and abrasion properties, e.g. B. Al die casting or sintered metal.
- a pin penetrating the ring insert 8, the cam ring 22 and the end plate -24 secures the pump components against rotation.
- the shaft 6 is inserted into the bore 36 of the ring insert 8 pre-assembled with the delivery piston 11 and the sealing rings 19 and 19A. Then this assembly unit is pushed into the housing 4. Subsequently, the preassembled pump package 20, 21, 22 is pushed onto the shaft end of the shaft 6 protruding from the ring insert 8 or the housing 4. After pre-assembly of the flow control valve 31 in the housing 7 and after inserting the end plate 24, the housing 7 can be flanged to the housing 4 and screwed to it.
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4217259A DE4217259A1 (en) | 1992-05-25 | 1992-05-25 | DOUBLE PUMP |
DE4217259 | 1992-05-25 | ||
PCT/EP1993/001224 WO1993024753A1 (en) | 1992-05-25 | 1993-05-17 | Double pump |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0642628A1 true EP0642628A1 (en) | 1995-03-15 |
EP0642628B1 EP0642628B1 (en) | 1995-11-29 |
Family
ID=6459679
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93910004A Expired - Lifetime EP0642628B1 (en) | 1992-05-25 | 1993-05-17 | Double pump |
Country Status (5)
Country | Link |
---|---|
US (1) | US5549452A (en) |
EP (1) | EP0642628B1 (en) |
JP (1) | JPH07507121A (en) |
DE (2) | DE4217259A1 (en) |
WO (1) | WO1993024753A1 (en) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19736160A1 (en) * | 1997-08-20 | 1999-02-25 | Bosch Gmbh Robert | High pressure fuel pump for IC engine in common rail systems |
DE19821794A1 (en) * | 1998-05-15 | 1999-11-18 | Continental Teves Ag & Co Ohg | Motor vehicle media pump off motor shaft |
JP3871031B2 (en) | 2001-11-21 | 2007-01-24 | 株式会社デンソー | Fuel injection pump |
DE10161258A1 (en) * | 2001-12-13 | 2003-07-03 | Bosch Gmbh Robert | High-pressure fuel pump with integrated blocking vane feed pump |
DE10228552B9 (en) | 2002-06-26 | 2007-08-23 | Siemens Ag | Radial piston pump unit |
US20060213477A1 (en) * | 2003-02-14 | 2006-09-28 | Luk Automobiltechnik Gmbh & Co. Kg | Pump combination |
US8414275B1 (en) | 2007-01-11 | 2013-04-09 | Reebok International Limited | Pump and valve combination for an article of footwear incorporating an inflatable bladder |
DE102008000700A1 (en) * | 2008-03-17 | 2009-09-24 | Robert Bosch Gmbh | fuel pump |
DE102013210036A1 (en) * | 2013-05-29 | 2014-12-04 | Robert Bosch Gmbh | High pressure pump for a fuel injection system |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2512025A (en) * | 1948-04-17 | 1950-06-20 | Borg Warner | Pump-gear and piston combination with unloading |
DE3366576D1 (en) * | 1983-06-18 | 1986-11-06 | Vickers Systems Gmbh | Double pump |
DE3623392C2 (en) * | 1985-07-24 | 1995-04-06 | Barmag Barmer Maschf | Pump combination |
DE8912797U1 (en) * | 1989-10-28 | 1989-12-28 | Vickers Systems Gmbh, 6380 Bad Homburg, De | |
DE4103986C2 (en) * | 1990-02-10 | 1999-11-25 | Zahnradfabrik Friedrichshafen | Double pump |
-
1992
- 1992-05-25 DE DE4217259A patent/DE4217259A1/en not_active Withdrawn
-
1993
- 1993-05-17 EP EP93910004A patent/EP0642628B1/en not_active Expired - Lifetime
- 1993-05-17 JP JP6500132A patent/JPH07507121A/en active Pending
- 1993-05-17 US US08/331,492 patent/US5549452A/en not_active Expired - Fee Related
- 1993-05-17 DE DE59301052T patent/DE59301052D1/en not_active Expired - Fee Related
- 1993-05-17 WO PCT/EP1993/001224 patent/WO1993024753A1/en active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO9324753A1 * |
Also Published As
Publication number | Publication date |
---|---|
JPH07507121A (en) | 1995-08-03 |
WO1993024753A1 (en) | 1993-12-09 |
DE59301052D1 (en) | 1996-01-11 |
DE4217259A1 (en) | 1992-11-12 |
US5549452A (en) | 1996-08-27 |
EP0642628B1 (en) | 1995-11-29 |
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Legal Events
Date | Code | Title | Description |
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PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
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