GB2205611A - A pump assembly - Google Patents

A pump assembly Download PDF

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Publication number
GB2205611A
GB2205611A GB08713407A GB8713407A GB2205611A GB 2205611 A GB2205611 A GB 2205611A GB 08713407 A GB08713407 A GB 08713407A GB 8713407 A GB8713407 A GB 8713407A GB 2205611 A GB2205611 A GB 2205611A
Authority
GB
United Kingdom
Prior art keywords
pump assembly
pump
casing
shaft
pump unit
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
Application number
GB08713407A
Other versions
GB2205611B (en
GB8713407D0 (en
Inventor
Philip John Ravenscroft
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rover Co Ltd
Original Assignee
Rover Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rover Co Ltd filed Critical Rover Co Ltd
Priority to GB8713407A priority Critical patent/GB2205611B/en
Publication of GB8713407D0 publication Critical patent/GB8713407D0/en
Publication of GB2205611A publication Critical patent/GB2205611A/en
Application granted granted Critical
Publication of GB2205611B publication Critical patent/GB2205611B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • F04C11/00—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations
    • F04C11/005—Combinations of two or more machines or pumps, each being of rotary-piston or oscillating-piston type; Pumping installations of dissimilar working principle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B77/00—Component parts, details or accessories, not otherwise provided for
    • F02B77/14—Engine-driven auxiliary devices combined into units
    • 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
    • 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
    • F04B23/14—Combinations of two or more pumps the pumps being of different types at least one pump being of the non-positive-displacement type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/12—Combinations of two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01P—COOLING OF MACHINES OR ENGINES IN GENERAL; COOLING OF INTERNAL-COMBUSTION ENGINES
    • F01P5/00—Pumping cooling-air or liquid coolants
    • F01P5/10—Pumping liquid coolant; Arrangements of coolant pumps
    • F01P5/12—Pump-driving arrangements
    • 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

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Details And Applications Of Rotary Liquid Pumps (AREA)

Abstract

The assembly has a casing 11 defining at least two working chambers 14, 15 each of which has a respective inlet and outlet means 16, 18 and 17, 19 associated with it. A shaft 20 is rotatably supported by the casing 11 and is adapted near one end to be driven by a source of motive power. There are a like number of rotors 25, 26 as there are working chambers 14, 15, all of the rotors 25, 26 being mounted upon the shaft 20 for rotation therewith. Sealing means 27, 28 are interposed between adjacent working chambers 14, 15 to prevent fluid transfer between the working chambers 14, 15. The pump 14, 25 is a positive displacement pump for supplying oil to a power steering actuator whereas the pump 15, 26 is a centrifugal pump for supplying coolant. <IMAGE>

Description

A Pump Assembly This invention relates to pumps and in particular to auxiliary pumps for motor vehicles.
It is known to provide for the engine of a motor vehicle a coolant pump to circulate coolant through the engine, the pump being driven by a belt from a pulley connected to one end of the crankshaft of the engine. It is similarly known to provide a power steering pump driven in a like manner to supply high pressure oil to a power steering actuating mechanism.
It is further known to drive other auxiliary equipment such as air conditioning or emission control pumps and the alternator in a similar manner.
This has the disadvantage that one end of the engine becomes congested with the plurallty of auxiliary belts required to drive the auxiliary equipment and the overal length of the engine is increased, this being particularly disadvantageous in the case of a small transverse engine vehicle where space is at a premium.
According to the invention there is provided a pump assembly comprising a casing defining at least two working chambers, each of which has a respective inlet and outlet means associated therewith, a shaft rotatably supported by the casing and adapted near one end to be driven by a source of motive power, sealing means interposed between adjacent working chambers to prevent fluid transfer therebetween and a like number of rotors as there are working chambers each rotor co-operating with the working chamber in which it is located to provide an independent pump unit wherein the rotors are mounted upon,said shaft for rotation therewith.
The pump assembly may have two working chambers and two rotors, a first working chamber and rotor to define a first high pressure pump unit and a second working chamber and rotor to define a second low pressure pump unit.
The first pump unit maybe a positive displacement pump unit and the second pump unit maybe a centrifugal pump.
Advantageously, the pump assembly is an auxiliary pump assembly for an internal combustion engine the first high pressure pump unit being arranged to supply oil at high pressure and the second low pressure pump unit being arranged to circulate coolant through the engine.
The invention will now be described by way of example with reference to the accompanying figure.
With reference to figure 1 there is shown a pump assembly for an internal combustion engine of a motor vehicle.
The pump assembly comprises a casing 11 defining first and second working chambers 14 and 15 each of which has a respective inlet and outlet means 16,18 and 17,19 associated therewith, a shaft 20 rotatably supported by the casing 11, sealing means 27,28 interposed between adjacent working chambers 14,15 to prevent fluid transfer therebetween and first and second rotors 25 and 26 mounted upon said shaft 20 for rotation therewith.
The casing 11 has a body portion 12 and an end portion 13. The body portion 12 has a stepped bore defining a first working chamber 14 and the end portion 13 has a stepped bore defining the second working chamber 15. The end portion 13 is secured to the body portion 12 by a number of cicumferentially spaced bolts (not shown).
The shaft 20 is rotatably mounted by means of three bearings 21,22,23 carried by the body portion 12 and is adapted near one end to be driven by a source of motive power, having a threaded bore 24 used to attach a pulley (not shown) to the shaft 20. The pulley is driven by a belt (not shown) from a further pulley attached to the end of the crankshaft of the engine (not shown).
The bearings are spaced out along the shaft 20 there being first and second plain bearings 21 and 22 located one on each side of the first rotor 25 and a ball bearing 23 located near to the end of the shaft 20 that is driven.
The first rotor 25 defines in combination with the first working chamber 14 a positive displacement pump arranged to be supplied with oil from a reservoir (not shown) through the inlet means 16 and to supply oil at high pressure to a power steering actuator (not shown) through the outlet means 17.
The second rotor 26 defines in combination with the second working chamber 15 a centrifugal pump arranged to be supplied with coolant through the inlet means 18 and to supply coolant at increased pressure through the outlet means 19. The centrifugal pump has no separate bearings, it being supported by the bearings 21,22,23 of the high pressure pump.
The sealing means includes a first seal 27 located with respect to the body portion 12 by means of a plate 30 a second seal 28 located with respect to the body portion 12 by means of an end plate 31 and vent means in the form of a hole 35 through a side wall of the body portion 12. The provision of a vent ensures that the pressure between the plates 30,31 is at substantially the same level as that of the surrounding air thereby preventing a build up of pressure between the seals 27,28 and allowing any fluid that should escape from the first and second working chambers 14 and 15 to drain away . As the pressure between the seals is maintained at or below the pressure in either of the working chambers 14,15 the risk of leakage from one of the working chambers to the other is reduced to a minimum.
The plate 30 is retained in the stepped bore of the body portion 12 by means of a snap ring 36 and includes passageways 34 which form an inlet port for the positive displacement pump.The plate 30 is used to support the second plain bearing 22 which is press fitted into an aperture in the centre of the plate 30.
Although the invention has been described with reference to a combined power steering/water pump it is not limited to such an arrangement the high pressure pump could for example be a scavange pump for a dry sump engine or an emission control pump. Furthermore a pump assembly according to this invention is not limited to use as an auxiliary pump for an internal combustion engine it could be used in any application where two or more separate pressurised fluid supplies are required.
Reference in the description to a positive displacement pump includes any known type of positive displacement pump such as bi-eccentric rotor sliding vane, gear pumps and roller pumps.

Claims (12)

Claims
1. A pump assembly comprising a casing defining at least two working chambers, each of which has a respective inlet and outlet means associated therewith, a shaft rotatably supported by the casing and adapted near one end to be driven by a source of motive power, sealing means interposed between adjacent working chambers to prevent fluid transfer therebetween and a like number of rotors as there are working chambers each rotor co-operating with the working chamber in which it is located to provide an independent pump unit wherein the rotors are mounted upon said shaft for rotation therewith.
2. A pump assembly as claimed in claim 1 in which there are two working chambers and two rotors, a first working chamber and rotor to define a first high pressure pump unit and a second working chamber and rotor to define a second low pressure pump unit.
3. A pump assembly as claimed in claim 2 in which the first pump unit is a positive displacement pump unit and the second pump unit is a centrifugal pump.
4. A pump assembly as claimed in claim 2 or in claim 3 in which the casing has a body portion defining the first working chamber and an end casing defining the second working chamber.
5. A pump assembly as claimed in any of claims 2 to 4 in which the end casing is made from a polymeric material.
6. A pump assembly as claimed in any of claims 2 to 5 in which the shaft is supported by bearing means located one on each side of the first rotor.
7. A pump assembly as claimed in claim 6 in which the shaft is further supported by an additional bearing at a position near to the one end where it is adapted to be driven.
8. A pump assembly as claimed in any of claims 2 to 7 in which the sealing means comprises two spaced apart seals supported by the casing to define a chamber therebetween and vent means to maintain the chamber at substantially the same pressure as that surrounding the pump assembly.
9. A pump assembly as claimed in any of claims 2 to 8 in which the pump assembly is an auxiliary pump assembly for an internal combustion engine the first high pressure pump unit being arranged to supply oil a high pressure and the second low pressure pump unit being arranged to circulate coolant through the engine.
10. A pump assembly as claimed in claim 9 in which the first pump unit is a power assisted steering pump.
11. A pump assembly as claimed in claim 9 or in claim 10 in which the shaft is adapted to be driven by an auxiliary drive of the engine by having a pulley attached thereto.
12. A pump assembly substantially described herein with reference to the accompanying drawing.
GB8713407A 1987-06-09 1987-06-09 A pump assembly for a motor vehicle. Expired - Lifetime GB2205611B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8713407A GB2205611B (en) 1987-06-09 1987-06-09 A pump assembly for a motor vehicle.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8713407A GB2205611B (en) 1987-06-09 1987-06-09 A pump assembly for a motor vehicle.

Publications (3)

Publication Number Publication Date
GB8713407D0 GB8713407D0 (en) 1987-07-15
GB2205611A true GB2205611A (en) 1988-12-14
GB2205611B GB2205611B (en) 1991-08-21

Family

ID=10618579

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8713407A Expired - Lifetime GB2205611B (en) 1987-06-09 1987-06-09 A pump assembly for a motor vehicle.

Country Status (1)

Country Link
GB (1) GB2205611B (en)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2635831A1 (en) * 1988-08-30 1990-03-02 Aisin Seiki HYDRAULIC PUMP SYSTEM FOR HYDRAULICALLY DRIVEN FAN SYSTEM
GB2239049A (en) * 1989-11-30 1991-06-19 * Rover Group Limited A pump assembly
EP0800943A1 (en) * 1995-11-06 1997-10-15 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Heating system for vehicles
EP0825055A1 (en) * 1996-03-01 1998-02-25 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Auxiliary machines for a vehicule
EP0773122A3 (en) * 1995-11-13 1999-01-20 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Automobile heating system
GB2351322A (en) * 1999-06-23 2000-12-27 Concentric Pumps Ltd Pump housing for a coolant pump and a lubricant pump
EP1092853A3 (en) * 1999-10-15 2003-06-04 Siemens VDO Automotive Inc. Accessory drive assembly
WO2004088103A1 (en) * 2003-03-07 2004-10-14 Chongqing Lifan Industry (Group) Co., Ltd . Water pump for motorcycle engine
WO2004092588A1 (en) * 2003-04-16 2004-10-28 O.M.P. Officine Mazzocco Pagnoni S.R.L. Oil and vacuum pumps group for a motor vehicle engine
CN103306799A (en) * 2013-06-26 2013-09-18 长城汽车股份有限公司 Pump in engine
WO2014014637A1 (en) * 2012-07-19 2014-01-23 Chrysler Group Llc A combination pump assembly and method of use
DE102013219413B4 (en) * 2012-10-09 2014-12-18 GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) COOLING PUMP FOR A COOLING SYSTEM
EP3492715A1 (en) 2017-11-29 2019-06-05 Airbus Helicopters An internal combustion engine having at least one crankcase of the dry-sump type
US10577990B2 (en) 2016-10-17 2020-03-03 Airbus Helicopters Internal combustion engine having at least one crankcase of the dry-sump type
CN112360620A (en) * 2020-11-09 2021-02-12 中国船舶重工集团公司第七0四研究所 Light seawater and lubricating oil integrated pump set

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB280779A (en) * 1927-03-23 1927-11-24 Irving Callender Jennings Wet vacuum pumping apparatus
GB350551A (en) * 1930-03-14 1931-06-15 Drysdale & Co Ltd Improvements in and relating to combined water and air pump units
GB463208A (en) * 1935-12-02 1937-03-24 Drysdale & Co Ltd Improved pumping unit
GB644840A (en) * 1947-05-31 1950-10-18 Economy Faucet Company Improvements in rotary liquid pumps
GB743088A (en) * 1952-08-25 1956-01-11 Raymond John Francis Moore Improvements relating to rotary pumps and motors
GB2093530A (en) * 1981-02-19 1982-09-02 Dewandre Co Ltd C Rotary fluid pumps

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB347175A (en) * 1930-01-14 1931-04-14 Angelo Pierotti Improvements in or relating to two-stroke internal-combustion engines

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB280779A (en) * 1927-03-23 1927-11-24 Irving Callender Jennings Wet vacuum pumping apparatus
GB350551A (en) * 1930-03-14 1931-06-15 Drysdale & Co Ltd Improvements in and relating to combined water and air pump units
GB463208A (en) * 1935-12-02 1937-03-24 Drysdale & Co Ltd Improved pumping unit
GB644840A (en) * 1947-05-31 1950-10-18 Economy Faucet Company Improvements in rotary liquid pumps
GB743088A (en) * 1952-08-25 1956-01-11 Raymond John Francis Moore Improvements relating to rotary pumps and motors
GB2093530A (en) * 1981-02-19 1982-09-02 Dewandre Co Ltd C Rotary fluid pumps

Cited By (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2635831A1 (en) * 1988-08-30 1990-03-02 Aisin Seiki HYDRAULIC PUMP SYSTEM FOR HYDRAULICALLY DRIVEN FAN SYSTEM
GB2239049A (en) * 1989-11-30 1991-06-19 * Rover Group Limited A pump assembly
GB2239049B (en) * 1989-11-30 1993-11-24 Rover Group A pump assembly
EP0800943A1 (en) * 1995-11-06 1997-10-15 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Heating system for vehicles
EP0800943A4 (en) * 1995-11-06 1999-01-13 Toyoda Automatic Loom Works Heating system for vehicles
EP0773122A3 (en) * 1995-11-13 1999-01-20 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Automobile heating system
EP0825055A1 (en) * 1996-03-01 1998-02-25 Kabushiki Kaisha Toyoda Jidoshokki Seisakusho Auxiliary machines for a vehicule
EP0825055A4 (en) * 1996-03-01 1999-01-13 Toyoda Automatic Loom Works Auxiliary machines for a vehicule
GB2351322A (en) * 1999-06-23 2000-12-27 Concentric Pumps Ltd Pump housing for a coolant pump and a lubricant pump
EP1092853A3 (en) * 1999-10-15 2003-06-04 Siemens VDO Automotive Inc. Accessory drive assembly
WO2004088103A1 (en) * 2003-03-07 2004-10-14 Chongqing Lifan Industry (Group) Co., Ltd . Water pump for motorcycle engine
WO2004092588A1 (en) * 2003-04-16 2004-10-28 O.M.P. Officine Mazzocco Pagnoni S.R.L. Oil and vacuum pumps group for a motor vehicle engine
WO2014014637A1 (en) * 2012-07-19 2014-01-23 Chrysler Group Llc A combination pump assembly and method of use
DE102013219413B4 (en) * 2012-10-09 2014-12-18 GM Global Technology Operations, LLC (n.d. Ges. d. Staates Delaware) COOLING PUMP FOR A COOLING SYSTEM
US9103351B2 (en) 2012-10-09 2015-08-11 GM Global Technology Operations LLC Cooling pump for a cooling system
CN103306799A (en) * 2013-06-26 2013-09-18 长城汽车股份有限公司 Pump in engine
US10577990B2 (en) 2016-10-17 2020-03-03 Airbus Helicopters Internal combustion engine having at least one crankcase of the dry-sump type
EP3492715A1 (en) 2017-11-29 2019-06-05 Airbus Helicopters An internal combustion engine having at least one crankcase of the dry-sump type
CN112360620A (en) * 2020-11-09 2021-02-12 中国船舶重工集团公司第七0四研究所 Light seawater and lubricating oil integrated pump set

Also Published As

Publication number Publication date
GB2205611B (en) 1991-08-21
GB8713407D0 (en) 1987-07-15

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Legal Events

Date Code Title Description
732 Registration of transactions, instruments or events in the register (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950609