EP1830045A1 - Regulierte Wasserpumpe - Google Patents

Regulierte Wasserpumpe Download PDF

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Publication number
EP1830045A1
EP1830045A1 EP07103413A EP07103413A EP1830045A1 EP 1830045 A1 EP1830045 A1 EP 1830045A1 EP 07103413 A EP07103413 A EP 07103413A EP 07103413 A EP07103413 A EP 07103413A EP 1830045 A1 EP1830045 A1 EP 1830045A1
Authority
EP
European Patent Office
Prior art keywords
cage
shaft
integral
bearing
drive shaft
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
EP07103413A
Other languages
English (en)
French (fr)
Other versions
EP1830045B1 (de
Inventor
Pierre Reininger
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.)
Pierburg Pump Technology France SARL
Original Assignee
Pierburg SARL
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Filing date
Publication date
Application filed by Pierburg SARL filed Critical Pierburg SARL
Publication of EP1830045A1 publication Critical patent/EP1830045A1/de
Application granted granted Critical
Publication of EP1830045B1 publication Critical patent/EP1830045B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
    • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
    • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
    • 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
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D13/00—Pumping installations or systems
    • F04D13/02—Units comprising pumps and their driving means
    • F04D13/021—Units comprising pumps and their driving means containing a coupling
    • 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
    • F01P7/00—Controlling of coolant flow
    • F01P7/14—Controlling of coolant flow the coolant being liquid
    • F01P7/16—Controlling of coolant flow the coolant being liquid by thermostatic control
    • F01P7/164—Controlling of coolant flow the coolant being liquid by thermostatic control by varying pump speed

Definitions

  • the invention relates to a water pump according to the preamble of claim 1.
  • Paddle pumps especially in the automotive industry, are used to circulate water in the vehicle cooling system. They are set in motion by a belt connected to the engine.
  • the pulley rotated by the belt was directly fitted on the drive shaft and the ball bearing was inside the pump body.
  • the pulley can also be mounted on a ball bearing placed on a bearing housing of the pump.
  • the belt is connected to the motor so that as it rotates, the belt drives the pump in rotation, whether or not it is necessary to circulate the coolant. This results in a significant loss of energy and increased wear of the pump parts.
  • the pump rotates according to the speed of the motor.
  • the most common is to provide the pump with a coupler associated with a control element by temperature.
  • An expandable element directly or indirectly causes coupling of the coupler when it reaches a certain expansion. This expandable element is under the influence of the temperature of the water circulating in the pump.
  • the coupler may be placed between the drive shaft and the impeller or between the drive means and the drive shaft.
  • the documents DE 43 25 627 A1 and DE 28 34 199 A1 for example, have pumps having a coupler placed between the drive shaft and the impeller.
  • the coupling means are constituted by a disk in a working chamber containing a viscous liquid. This viscous liquid flows between a reservoir and the working chamber through an opening controlled by a valve and then returns through a return hole in the reservoir.
  • the valve is actuated by means of an expandable element. The warmer the water on the front side of the impeller, the more the expansion element expands, causing the valve to open, the viscous liquid to enter the working chamber and the coupling between the disc drive and the impeller.
  • This solution is particularly bulky.
  • the coupling device, parallel to the impeller, requires increasing the height of the pump.
  • an expandable member consisting of an annular cylinder containing an expandable product and having two cylindrical walls forming friction surfaces for frictional engagement with the friction surfaces on the wheel hub and the shaft.
  • drive There is no viscous liquid between the different friction surfaces, only a layer of water from the pump.
  • this expandable element requires two pairs of friction surfaces arranged parallel to the axis of the drive shaft. Due to the friction between the expandable member and the corresponding surfaces of the drive shaft and the impeller, this expandable member is subject to rapid wear.
  • the expandable element is located at the bottom of a dead space located between the hub of the wheel and the drive shaft and closed at one of its ends by the retaining ring of the impeller. The prevailing water, whose temperature must cause the dilatation of the expandable element, can not easily circulate. Its temperature is therefore not significant from that flowing in the cooling circuit.
  • the viscocoupler is placed between the drive means and the drive shaft.
  • This device comprises a multi-plate clutch actuated with a viscous liquid.
  • This viscous liquid is included in a compression chamber consisting on the one hand of a fixed wall and on the other hand by a movable wall.
  • An expandable element, placed in the pump near the impeller, causes during its expansion the displacement of a rod passing through the drive shaft and fixed by its other end to the movable wall of the chamber of compression.
  • the expandable element in the pipe is an obstacle to the flow of water.
  • this element is relatively bulky, as is the entire clutch.
  • the displacement of the rod in the housing made in the drive shaft is accompanied friction and therefore wear.
  • the objective of the present invention is to develop a water pump according to the preamble whose coupling device is less bulky and less subject to wear than those of known devices.
  • the compression means comprise a deformable chamber containing a heat-expandable liquid whose deformable wall separates it from the compression chamber. This avoids any solid friction between the compression means and the drive shaft.
  • one of the walls of the compression chamber is integral with the drive means and another is integral with the drive shaft.
  • the compression means compress the viscous liquid which then ensures the hydraulic coupling between the integral wall of the drive means and the integral wall of the drive shaft.
  • the deformable chamber may be integral with the drive shaft or, preferably, drive means.
  • the drive shaft may be hollow and closed at its end carrying the impeller, for example by a sealing plug. It is then possible to place the viscocoupler inside this tree.
  • the coupling device may comprise a primary shaft penetrating into the drive shaft and secured to the drive means, for example by means of a housing, a deformable tube being arranged around the primary shaft inside the drive shaft without touching it, a heat-expandable liquid being contained in the chamber formed by the space between the primary shaft and the deformable tube, a liquid viscous being placed in the compression chamber located between the deformable tube and the inner wall of the drive shaft.
  • This solution is particularly compact and fits into the drive shaft present anyway in the pump.
  • the transmission shaft is integral with the cage of a first bearing, preferably the outer cage, the other cage of the first bearing, preferably the inner cage, being integral with the pump body.
  • the bearing outside the pump on a bearing provided for this purpose.
  • the drive means comprise a contact surface secured to the cage of a second bearing, preferably the outer cage, the other cage of the second bearing, preferably the inner cage being preferably integral with the cage of the first bearing integral with the drive shaft, the coupling device being interposed between the cage of the second bearing integral with the drive means and the transmission shaft.
  • the pump (1) is composed of a housing (2) in which there is a impeller (3) mounted on a drive shaft (4). Driving means are provided for driving the shaft (4) in rotation.
  • the housing (1) is provided with a bearing (5) on which is fitted the inner cage (6 ') of a first ball bearing (6).
  • the drive shaft (4) is integral with the outer race (6 ") of the same first bearing (6), for which the drive shaft is extended by a radial housing (7) which ends with a ring (8) extending axially.
  • This ring (8) is fitted on the outer casing (6 ') of the first bearing (6) It is obvious that it would also be possible to directly fasten the radial casing (7). ) with the outer cage (6 ") of the first bearing (6).
  • a second bearing (9) is fitted on the crown (8).
  • the inner race (9 ') of this second bearing (9) is thus integral with the drive shaft (4), while the outer race (9 ") serves as a pulley for a drive belt (not shown). It is also possible to place a pulley on the outer cage (9 ") of this second bearing (9).
  • a dynamic seal (10) is placed between the housing (2) and the drive shaft (4) to seal the pump (1) at the driver.
  • the pump can not work.
  • the friction experienced by the impeller in the pump is too great for the rotation of the outer cage (9 ") of the second bearing (9) can significantly cause the inner cage (9 ') and therefore the shaft d training (4).
  • a coupling device is therefore arranged between the drive shaft (4) and the outer race (9 ") of the second bearing (9) to couple or disconnect these two elements as a function of the temperature of the water prevailing in the circuit connected to the pump (1).
  • This coupling device is controlled as a function of the temperature of the water in the pump, particularly at the level of the impeller. A viscous liquid made active when the temperature increases ensures the hydraulic coupling between the drive means (9 ") and the drive shaft (4).
  • the drive shaft (4) is hollow and supports the coupling device.
  • the latter is essentially composed of a primary rotating shaft (20) secured to the drive means (9 ") via a housing (21), this primary shaft is partially surrounded by a deformable tube (22). containing a liquid that can expand under the effect of heat.
  • the drive shaft (4) is closed by a sealing plug (23).
  • the hollow drive shaft (4) is closed by a seal (24) placed between the end of the deformable tube (22) and the inner wall of the hollow shaft (4).
  • a closed chamber (25) between the deformable tube (22) and the inner wall of the drive shaft (4).
  • This chamber (25) is filled with a viscous liquid. The amount of viscous liquid is chosen such that when the deformable tube (22) is not deformed (low temperature), the viscous liquid pressure prevailing in the chamber (25) is insufficient to ensure a coupling between the shaft primary (20) and drive shaft (4).
  • the thermal coupling between the water located at the impeller and the expandable liquid can be done via the hollow shaft (4) or the sealing plug (23), the viscous liquid and the tube deformable (22).
  • the transition from the uncoupled state to the coupled state can be done more or less gradually.
  • the pump it will be possible to design the pump so that it turns all the faster as the temperature of the cooling water is high, while it will run slower if the temperature is lower and will be at a lower temperature. stop when the water temperature is below a certain threshold.
  • the first bearing for rotating the drive shaft may be inside the housing.
  • the second bearing need not necessarily be located around the first one.
  • the drive belt can cooperate either directly with the outer cage (9 ") or with a pulley secured to the outer race (9") of the second bearing.
  • the regulation can be done instantaneously when a certain threshold value is reached, or on the contrary progressively according to the needs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Sorption Type Refrigeration Machines (AREA)
  • Control Of Non-Positive-Displacement Pumps (AREA)
EP07103413A 2006-03-02 2007-03-02 Regulierte Wasserpumpe Active EP1830045B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR0650733A FR2898154A1 (fr) 2006-03-02 2006-03-02 Pompe a eau regulee

Publications (2)

Publication Number Publication Date
EP1830045A1 true EP1830045A1 (de) 2007-09-05
EP1830045B1 EP1830045B1 (de) 2008-05-07

Family

ID=37334305

Family Applications (1)

Application Number Title Priority Date Filing Date
EP07103413A Active EP1830045B1 (de) 2006-03-02 2007-03-02 Regulierte Wasserpumpe

Country Status (4)

Country Link
EP (1) EP1830045B1 (de)
AT (1) ATE394586T1 (de)
DE (1) DE602007000014D1 (de)
FR (1) FR2898154A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8512185B2 (en) 2008-12-12 2013-08-20 Schaeffler Technologies AG & Co. KG Switchable drive pulley with electrically actuated friction disc torque transfer mechanism

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018137045A1 (en) 2017-01-30 2018-08-02 Litens Automotive Partnership Clutched vacuum pump system

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2834199A1 (de) * 1978-08-04 1980-02-21 Daimler Benz Ag Thermostatische kraftschluessige kupplung zum loesen der antriebsverbindung zwischen einem pumpenrad und einer antriebswelle bei einer kuehlwasserpumpe fuer fluessigkeitsgekuehlte brennkraftmaschinen
DE4325627A1 (de) * 1993-07-30 1995-02-02 Behr Gmbh & Co Antriebsvorrichtung für eine Wasserpumpe
JP2001090537A (ja) * 1999-09-24 2001-04-03 Isuzu Motors Ltd ウォータポンプ

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2163835B (en) * 1984-08-30 1988-03-30 Aisin Seiki Viscous fluid couplings

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2834199A1 (de) * 1978-08-04 1980-02-21 Daimler Benz Ag Thermostatische kraftschluessige kupplung zum loesen der antriebsverbindung zwischen einem pumpenrad und einer antriebswelle bei einer kuehlwasserpumpe fuer fluessigkeitsgekuehlte brennkraftmaschinen
DE4325627A1 (de) * 1993-07-30 1995-02-02 Behr Gmbh & Co Antriebsvorrichtung für eine Wasserpumpe
JP2001090537A (ja) * 1999-09-24 2001-04-03 Isuzu Motors Ltd ウォータポンプ

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8512185B2 (en) 2008-12-12 2013-08-20 Schaeffler Technologies AG & Co. KG Switchable drive pulley with electrically actuated friction disc torque transfer mechanism

Also Published As

Publication number Publication date
EP1830045B1 (de) 2008-05-07
ATE394586T1 (de) 2008-05-15
DE602007000014D1 (de) 2008-06-19
FR2898154A1 (fr) 2007-09-07

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