EP3798429A1 - Double pompe et dispositif de refoulement d'huile permettant de pomper de l'huile pour un moteur à combustion interne - Google Patents

Double pompe et dispositif de refoulement d'huile permettant de pomper de l'huile pour un moteur à combustion interne Download PDF

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Publication number
EP3798429A1
EP3798429A1 EP20198080.2A EP20198080A EP3798429A1 EP 3798429 A1 EP3798429 A1 EP 3798429A1 EP 20198080 A EP20198080 A EP 20198080A EP 3798429 A1 EP3798429 A1 EP 3798429A1
Authority
EP
European Patent Office
Prior art keywords
pump
suction
area
oil
gearwheel
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.)
Withdrawn
Application number
EP20198080.2A
Other languages
German (de)
English (en)
Inventor
Domenico Palmisani
Andrea Cavazzoni
Stephan Piller
Pierre-Vincent Baechler
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.)
Liebherr Machines Bulle SA
Original Assignee
Liebherr Machines Bulle SA
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 Liebherr Machines Bulle SA filed Critical Liebherr Machines Bulle SA
Publication of EP3798429A1 publication Critical patent/EP3798429A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/12—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
    • F04C2/14—Rotary-piston machines or pumps 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/12—Closed-circuit lubricating systems not provided for in groups F01M1/02 - F01M1/10
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps
    • 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
    • F04C15/06—Arrangements for admission or discharge of the working fluid, e.g. constructional features of the inlet or outlet
    • 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
    • F04C2/00—Rotary-piston machines or pumps
    • F04C2/08—Rotary-piston machines or pumps of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
    • F04C2/082—Details specially related to intermeshing engagement type machines or pumps
    • F04C2/086—Carter
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/02—Pressure lubrication using lubricating pumps
    • F01M2001/0207—Pressure lubrication using lubricating pumps characterised by the type of pump
    • F01M2001/0238—Rotary pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/12—Closed-circuit lubricating systems not provided for in groups F01M1/02 - F01M1/10
    • F01M2001/123—Closed-circuit lubricating systems not provided for in groups F01M1/02 - F01M1/10 using two or more pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M1/00—Pressure lubrication
    • F01M1/12—Closed-circuit lubricating systems not provided for in groups F01M1/02 - F01M1/10
    • F01M2001/126—Dry-sumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps
    • F01M2011/0037—Oilsumps with different oil compartments
    • F01M2011/0041—Oilsumps with different oil compartments for accommodating movement or position of engines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps
    • F01M2011/007—Oil pickup tube to oil pump, e.g. strainer
    • F01M2011/0075—Oil pickup tube to oil pump, e.g. strainer with a plurality of tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
    • F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
    • F01M11/0004—Oilsumps
    • F01M2011/0083—Dry sumps
    • 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
    • F04C2210/00—Fluid
    • F04C2210/20—Fluid liquid, i.e. incompressible
    • F04C2210/206—Oil

Definitions

  • the present invention relates to a double pump and an oil delivery device for pumping oil for an internal combustion engine.
  • the oil pans In order to ensure that a lubricating oil pump of an internal combustion engine can suck in oil even in the case of steep inclines, the oil pans generally have a recess in which the oil is sucked in.
  • an oil pump is equipped with several suction heads, which are arranged appropriately distributed over the dry sump oil pan, so that at least one of the suction heads is always completely surrounded by oil even in the event of strong accelerations or inclines, this does not provide a remedy. Because if a suction head is not partially surrounded by oil, the oil pump delivers air and the required oil circuit comes to a standstill.
  • the aim of the present invention is to create a more cost-effective alternative to this, which at the same time saves installation space.
  • This is achieved with the double pump according to the invention according to claim 1.
  • Advantageous embodiments are described in the dependent claims.
  • an oil delivery device for pumping oil for an internal combustion engine is also claimed, which uses the double pump according to the invention.
  • the double pump according to the invention comprises a gear arrangement with three gears, of which a first of the three gears meshes with the other two gears, and a housing which surrounds the gear arrangement in such a way that when the gears of the gear arrangement rotate, a first suction area and a second suction area and a first delivery area and a second delivery area are formed by the gear arrangement, the housing having a first suction inlet fluidically connected to the first suction area.
  • the double pump is characterized in that the housing has a second suction inlet fluidically connected to the second suction region, and the first suction inlet and the second suction inlet are fluidically separated from one another.
  • the use of the expression “fluidically separated” does not mean 100% fluid separation, since there is a certain unavoidable fluid separation with every pump There is leakage, which is typically located in the area of the pumping station.
  • leakage which is typically located in the area of the pumping station.
  • the sealing of a piston in its cylinder is also not completely tight under working conditions.
  • gear pumps in which the housing, which clings to the rotating gear wheels, must also allow a small amount of leakage.
  • first suction inlet and the second suction inlet are fluidically separated from one another, which accordingly preferably means that a connection of these two inlets is only possible via a path running through the high pressure side.
  • a path running through the high pressure side.
  • such a path must always be minimized or completely blocked, as it works against the operating principle of the pump.
  • the advantage of the double pump according to the invention is that it has two suction areas that are fluidically separated from one another and can be connected to suction heads that are independent of one another by means of a respective suction inlet.
  • the structure of the gear pump enables a suction power at one of the suction inlets, although the other of the two suction inlets runs empty, that is, for example, does not convey any liquid but only draws in air.
  • the supply of air through the other intake inlet does not affect the suction generated by the one intake inlet, so that the pump according to the invention is particularly suitable as an oil pump in an internal combustion engine, in which it is advantageous to provide suction heads that are spaced apart and operate independently. In the present case, this is possible even though only a single pump with its two pumping stations is used.
  • the double pump has two independent pumping stations which, on their suction side, have two oil suction connections that are completely spatially or fluidically separate from one another. This separation begins at the various suction heads, the two separate lines leading to the pump, and extends, including inside the double pump, to the high-pressure side, where the two suction lines can be combined.
  • the double pump is an oil pump for delivering oil.
  • the mechanical power to drive the two pumping stations is brought in via a common input.
  • the oil outlet on the high pressure side preferably takes place via a common oil outlet.
  • the housing furthermore has a dispensing outlet, preferably a single dispensing outlet, which is fluidically connected to both the first dispensing area and the second dispensing area.
  • the two delivery areas are combined into a single outlet by a corresponding design of the pump housing in order to further minimize the dimensions of the pump.
  • the second gear wheel and the third gear wheel preferably all three gear wheels, have an identical external shape.
  • the respective axes of rotation of the three gear wheels are preferably parallel to one another, and these can also lie in a common plane.
  • first delivery area and the second delivery area are fluidically separated from each other by the gear arrangement and the housing from both the first suction area and the second suction area, preferably by attaching the housing to the outer contour of the three Gears of the gear arrangement reaches.
  • the housing is guided so close to the outer contour of the gearwheels that no significant quantities of fluid can flow between the outer contour of a respective gearwheel and the side of the housing facing the gearwheel.
  • the first suction area is arranged adjacent to a contact area of the first gear and the second gear, in which the teeth of these two gears move away from each other during operation of the pump
  • the first delivery area adjacent to a contact area of the first Gear and the second gear is arranged in which the teeth of these two gears move towards each other during operation of the pump
  • the second suction area is arranged adjacent to a contact area of the first gear and the third gear, in which the teeth of these two gears at move away from each other during operation of the pump
  • the second delivery region is arranged adjacent to a contact region of the first gear and the third gear, in which the teeth of these two gearwheels move towards one another during operation of the pump.
  • the fluid is enclosed within the tooth valley formed by two teeth and transported from the low-pressure side to the high-pressure side, before the fluid in the tooth valley is forcibly emptied by meshing with the tooth of the adjacent gear.
  • one of the three gears is a driven gear and the other two gears only rotate when the driven gear rotates.
  • the driven gear is advantageously one of the two externally arranged gearwheels, since the connection to a drive shaft can be configured in the simplest way.
  • the invention also relates to an oil delivery device for pumping oil for an internal combustion engine, which comprises a double pump according to one of the preceding claims and a sump pan, the first suction inlet and the second suction inlet of the double pump being arranged at regions of the sump pan that are spaced apart from one another, around a Sucking in lubricant.
  • the sump pan is a dry sump pan.
  • the pump is preferably driven directly by a main gear train of the internal combustion engine.
  • a common, preferably the only, delivery outlet of the pump is designed to deliver oil to a main oil pan.
  • each of the two suction inlets is provided with a respective oil strainer in order to sieve oil delivered by the pump.
  • the invention also relates to a vehicle with an internal combustion engine which has an oil delivery device according to one of the preceding variants.
  • Fig. 1 shows a sectional view of the double pump 1 according to the invention.
  • the central component of the double pump 1 is the gear arrangement 2, which with its three gear wheels 3, 4, 5 forms two pumping stations. If one of the three gears 3, 4, 5 is driven, each of the three gears 3, 4, 5 rotates in its corresponding direction, since the two outer gears 3, 5 mesh with the middle gear 4.
  • the housing is not only brought to the area of the outer gears facing away from the middle gear, but also to the two areas of the middle gear 4 in order to seal suction areas 7, 8 from delivery areas 9, 10, or to separate them fluidically.
  • the housing follows the maximum outer diameter of a rotating gear over the distance of at least one tooth pitch of the associated gear 3, 4, 5 for a sealing separation or fluidic separation.
  • the housing reaches the gearwheel over a section which extends at least from one tip of a tooth at the same time to an immediately adjacent tip of the same tooth.
  • the first suction area 7 and the second suction area 8 are located on that side of an engagement area of two gears 3, 4; 4,5, where the meshing gears move away from each other.
  • the meshing gears disengage and, with their freed tooth valleys, generate suction that sucks in a delivery fluid, for example oil.
  • the delivery fluid received between two tooth tips is then decoupled from the low-pressure side in that it is guided by the rotation of the gear into the section of the housing that approaches the gear.
  • the delivery fluid cannot escape in this area, since the housing interacts with the tooth tips in such a way that no or only a very small amount of delivery fluid can escape.
  • the delivery fluid received from the low pressure side is brought to the high pressure side, that is to say the delivery area 9, 10, where it is pushed out of its tooth valley due to the meshing of the other gear. Only a small part of the delivery fluid can remain in the tooth valley due to the engagement of the corresponding tooth, so that the delivery circuit for the delivery fluid now begins anew.
  • the pump 1 has a first and a second suction area 7, 8, which in the present case are connected to a respective suction inlet 11, 12, which are sealingly separated from one another or fluidically separated.
  • the present pump has two mutually separate suction inlets 11, 12, each of which leads to its own suction area 7, 8 of the pump.
  • the advantage here is that each of the two suction inlets 11, 12 draws in delivery fluid independently of the other suction inlet 12, 11. If one of the two suction inlets 11, 12 only sucks air, for example, this does not mean that the other suction inlet 12, 11 would no longer function. Since the suction inlets 11, 12 are each assigned exclusively to one suction area 7, 8, the suction effect can be maintained regardless of the state of the other suction inlet 12, 11.
  • the two delivery areas 9, 10 are combined with one another to form a common delivery outlet (not shown).
  • Fig. 1 arrows show the flow directions of a conveying fluid sucked in through the two suction inlets, which result when the outer right gearwheel 5 rotates clockwise.
  • Fig. 2 shows an oil delivery device 20 for an internal combustion engine.
  • a dry sump pan 21 can be seen, which serves to collect oil dripping from an internal combustion engine, so that the oil can be used again for lubrication.
  • the oil is pumped out of the sump pan 21 and fed to a main oil tank 23, from where it is conveyed to the lubrication points of the engine via a main oil pump.
  • the double pump 1 is suitable here for overcoming the disadvantage described, since the first suction inlet 11 and the second suction inlet 12 can each convey a delivery fluid independently of one another.
  • oil can be conveyed via the intake inlet 11 via the double pump 1 and the line 22 to the main oil tank 23, from where it is fed to the lubrication points of the internal combustion engine by means of the main oil pump 25.
  • the oil is output from the pump 1 via a common oil outlet of the two output areas 11, 12.
  • Fig. 3 Fig. 10 shows the oil delivery device 20 in a horizontal orientation.
  • the suction heads 24 are provided with filters or oil sieves that prevent the supply of impurities.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Rotary Pumps (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)
EP20198080.2A 2019-09-27 2020-09-24 Double pompe et dispositif de refoulement d'huile permettant de pomper de l'huile pour un moteur à combustion interne Withdrawn EP3798429A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH01230/19A CH716640A2 (de) 2019-09-27 2019-09-27 Doppelpumpe und Ölfördervorrichtung zum Pumpen von Öl für eine Verbrennungskraftmaschine.

Publications (1)

Publication Number Publication Date
EP3798429A1 true EP3798429A1 (fr) 2021-03-31

Family

ID=72658976

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20198080.2A Withdrawn EP3798429A1 (fr) 2019-09-27 2020-09-24 Double pompe et dispositif de refoulement d'huile permettant de pomper de l'huile pour un moteur à combustion interne

Country Status (2)

Country Link
EP (1) EP3798429A1 (fr)
CH (1) CH716640A2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022117957B3 (de) 2022-07-19 2023-12-28 Audi Aktiengesellschaft Motoreinheit mit einem Schmiermittelkreislauf

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022128264A1 (de) 2022-10-25 2024-04-25 Valeo Powertrain Gmbh Zahnradpumpe

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03107516A (ja) * 1989-09-20 1991-05-07 Nissan Motor Co Ltd オイルポンプ
US20050126532A1 (en) * 2003-12-01 2005-06-16 Noboru Sugamuna Lubricating apparatus for an internal combustion engine
CN202065029U (zh) * 2010-11-27 2011-12-07 湖南机油泵股份有限公司 三斜齿轮机油泵
WO2013053854A1 (fr) * 2011-10-14 2013-04-18 Continental Automotive Gmbh Dispositif de transport pour le transport d'huile depuis un réservoir vers une boîte de vitesses d'un véhicule automobile
DE102015002035A1 (de) * 2015-02-17 2016-08-18 Dieter Voigt Mehrstufige Ölpumpe

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH03107516A (ja) * 1989-09-20 1991-05-07 Nissan Motor Co Ltd オイルポンプ
US20050126532A1 (en) * 2003-12-01 2005-06-16 Noboru Sugamuna Lubricating apparatus for an internal combustion engine
CN202065029U (zh) * 2010-11-27 2011-12-07 湖南机油泵股份有限公司 三斜齿轮机油泵
WO2013053854A1 (fr) * 2011-10-14 2013-04-18 Continental Automotive Gmbh Dispositif de transport pour le transport d'huile depuis un réservoir vers une boîte de vitesses d'un véhicule automobile
DE102015002035A1 (de) * 2015-02-17 2016-08-18 Dieter Voigt Mehrstufige Ölpumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102022117957B3 (de) 2022-07-19 2023-12-28 Audi Aktiengesellschaft Motoreinheit mit einem Schmiermittelkreislauf

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