EP2299120B1 - Mechanische Kühlmittelpumpe zum Kühlen eines Verbrennungsmotors - Google Patents

Mechanische Kühlmittelpumpe zum Kühlen eines Verbrennungsmotors Download PDF

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Publication number
EP2299120B1
EP2299120B1 EP09170214.2A EP09170214A EP2299120B1 EP 2299120 B1 EP2299120 B1 EP 2299120B1 EP 09170214 A EP09170214 A EP 09170214A EP 2299120 B1 EP2299120 B1 EP 2299120B1
Authority
EP
European Patent Office
Prior art keywords
pump
wheel
control disk
disk
axially
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.)
Not-in-force
Application number
EP09170214.2A
Other languages
English (en)
French (fr)
Other versions
EP2299120A1 (de
Inventor
Pascal Georges
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 GmbH
Original Assignee
Pierburg Pump Technology GmbH
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 Pierburg Pump Technology GmbH filed Critical Pierburg Pump Technology GmbH
Priority to EP09170214.2A priority Critical patent/EP2299120B1/de
Publication of EP2299120A1 publication Critical patent/EP2299120A1/de
Application granted granted Critical
Publication of EP2299120B1 publication Critical patent/EP2299120B1/de
Not-in-force 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
    • F04D15/0027—Varying behaviour or the very pump
    • F04D15/0038—Varying behaviour or the very pump by varying the effective cross-sectional area of flow through the rotor

Definitions

  • the present invention refers to a mechanically driven liquid coolant pump for cooling an internal combustion engine.
  • a mechanical coolant pump is coupled to and driven by the engine itself. As a consequence, the coolant pump is driven as long as the engine is running, even if no or only a reduced coolant circulation is needed. This leads to unnecessary energy consumption for driving the pump while no coolant circulation is needed, and leads to a slow engine warming when the cold engine is started.
  • coolant pumps of the state of the art can be switched off by means of a clutch between the drive wheel and the pump wheel of the coolant pump.
  • This configuration bears the risk not to be totally failsafe because, in case of a malfunction or a jam of the clutch, a total stop of the pumping can occur when coolant circulation is needed. This can quickly lead to a serious damage of the engine.
  • US 4,798,517 A representing the closest prior art discloses a mechanical coolant pump which is switchable.
  • the actuator is a pneumatic means.
  • the pump wheel comprises a wheel disk and pump blades projecting axially from the wheel disk.
  • a separate control disk is provided with blade slits whereby the control disk is axially shiftable with respect to the pump wheel.
  • DE 1107886 discloses an air vent with a control disk which is actuated by a bimetal spring.
  • the mechanical coolant pump according to the invention is provided with a rotatable drive wheel driven by the engine and with a pump wheel directly connected with the drive wheel.
  • the pump wheel comprises a wheel disk and pump blades projecting axially from the wheel disk.
  • a separate control disk is provided with blade slits.
  • the control disk is coaxially provided at the pump wheel and is axially movable or shiftable with respect to the pump wheel.
  • the pump blades are received in the blade slits of the control disk, so that the control disk is rotated by and is rotating with the pump wheel, and the effective axial blade height of the blades between the wheel disk and the control disk is adjustable by axially shifting the control disk.
  • the pump wheel and the control wheel together form an impeller with a radial outside outlet.
  • the impeller, and in concrete the control disk can preferably be provided with a central axial inlet opening.
  • An actuation element for actuating the control disk, i.e. for axially shifting the control disk, is provided.
  • the actuation element is an electromagnetic actuator which pulls or pushes the actuation rod when energized.
  • the pumping performance of the coolant pump is controlled by the axial position of the control disk.
  • the control disk with an axial inlet opening is adjacent to the pump wheel disk in the idle position, the effective height of the pump blades between the pump disk and the control disk is low or zero.
  • the coolant pump still is pumping but with a significantly reduced low efficiency.
  • the control disk is spaced apart from the pump disk in its pumping position or pumping state, the effective height of the pump blades between the pump disk and the control disk is higher so that the pump is pumping with a higher or with the maximum pump efficiency.
  • the coolant pump Since even in the idle position of the control disk the pump wheel still is rotating and is pumping with a reduced efficiency, the coolant pump is absolutely failsafe.
  • the pumping position is the position of the control disk adjacent to the pump wheel disk, while the idle control disk position is spaced apart from the pump wheel disk.
  • the drive wheel and the pump wheel are connected by a tubular driving shaft, and the control disk is moved via the hollow space inside the driving shaft.
  • the tubular hollow configuration of the driving shaft makes it possible to position the actuation means for actuating the control disk remote from the control disk, for example distal of the drive wheel.
  • the control disk is axially moved by an actuation rod inside the tubular driving shaft. The actuation rod makes it possible to position the actuation element at the very distal end of the pump, so that the actuation element does not need to be inside of the water bearing part of the pump.
  • Figures 1 to 3 show a first embodiment of a mechanically driven coolant pump 10, which is not completely covered by claim 1, for cooling an internal combustion engine 12.
  • the coolant pump 10 circulates a coolant by pumping a coolant liquid from a central axial pump inlet 14 to a radial pump outlet 16.
  • the coolant pump 10 is switchable between an idle state shown in figures 1 and 3 and a pumping state shown in figure 2 .
  • the coolant pump 10 is provided with a hollow circular frame 20 which is mounted to an engine block 13 of the engine 12.
  • a distal end of the pump frame 20 supports a roller bearing 22 which is provided with a drive wheel 24.
  • the drive wheel 24 is driven by a drive belt 26 which is driven by the engine 12.
  • the drive wheel 24 is directly connected to a hollow tubular driving shaft 28 which supports at its proximal end a pump wheel 30.
  • the pump wheel 30 consists of a wheel disk 34 and several pump blades 32 projecting axially from the wheel disk 34.
  • the drive wheel 24 is directly and without any slip connected to the pump wheel 30 so that the pump wheel 30 is rotating as long when the drive wheel 24 is rotating.
  • the pump wheel 30 is provided with an axially shiftable control disk 40.
  • the control disk 40 consists of ring-like disk body 42 having a central inlet opening 15 and being provided with blade slits 44 through which the pump blades 32 protrude.
  • the control disk 40 is rotated together with the pump wheel 30.
  • the axial position of the control disk 40 is controlled by a thermal actuation element 46 via an actuation rod 48 which is moved axially by the thermal actuation element 46.
  • the actuation rod 48 is pushed by a preload spring 52 into the idle position.
  • the thermal actuation element 46 is provided with a wax element 50, which significantly increases its volume with increasing temperature.
  • the thermal actuation element 46 is provided with radial heat transfer fins 47 which improve the heat transfer between the wax element 50 and the environment.
  • the wax element 50 When the wax element 50 is cold, its volume is low so that the preload spring 52 is pushing the actuation rod 48 and the control wheel 40 into the idle position or idle state, as shown in figures 1 and 3 .
  • the wax element 50 When the wax element 50 is warm, it pushes the actuation rod 48 and the control wheel 40 into the pumping position, as shown in figure 2 .
  • the control disk body 42 In the idle position ( Fig. 1 ), the control disk body 42 is adjacent or at least very close to the pump wheel disk 52 so that the effective axial height of the pump blades 32 between the control disk body 42 and the wheel disk 52 is very low. This leads to a low pumping efficiency of the pump 10 so that a low pumping rate is achieved.
  • the pumping position ( Fig. 2 ) In the pumping position ( Fig. 2 ), the control disk body 42 and the pump wheel disk 52 have the maximum axial distance from each other, so that the axial height of the pump blades 32 between the control disk body 42 and the wheel disk 52 is maximally. This leads to the maximum pumping efficiency of the pump 10 so that the high pumping rate is achieved.
  • the temperature of the wax element 50 is determined by the temperature of the engine 12 on the basis of heat conduction via the pump frame 20, and via the environment on the basis of heat exchange via the heat exchange fins 47.
  • the pump 10 is driven in the pumping state or state, as shown in figure 2 .
  • the pump 10 is driven in the idle position or state, as shown in figures 1 and 3 .
  • FIGs 4 - 7 show a second embodiment of a mechanical coolant pump 10' which differs from the first embodiment shown in figures 1 and 2 only with respect to the actuation element and the control disk 40'.
  • the actuation element 70 of the pump 10' shown in figures 4 to 7 is realized as an electromagnetic actuator 72 which interacts with the actuation rod 74.
  • the distal end of the actuation rod 74 is provided with a permanent magnet 76 which is axially magnetized.
  • the actuation element is hold by a mounting bracket 78 mounted at the frame 20.
  • the control disk 40' is not ring-like but is a closed circular disk body 42' without a central inlet opening.
  • the actuation rod 74 and the control disk 40' are pushed into the idle position, or state, as shown in figures 5 and 7 .
  • the electromagnetic actuator 72 is not energized, the actuation rod 74 and the control wheel 40 are pulled by the preload spring 52 into the pumping position or state, as shown in figures 4 and 6 . If the actuation element 70 fails, the pump 10 is always driven in the pumping state, not in the idle state. This makes the pump 10' failsafe.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Claims (2)

  1. Mechanische Kühlmittelpumpe (10') zum Kühlen eines Verbrennungsmotors (12),
    mit
    einem von dem Motor (12) angetriebenen drehbaren Antriebsrad (24),
    einem Pumpenrad (30), das mit dem Antriebsrad (24) unmittelbar verbunden ist, wobei das Pumpenrad (30) eine Radscheibe (34) und axial von der Radscheibe (34) abstehende Pumpenflügel (32) aufweist,
    einer separaten Steuerscheibe (40), die axial bewegbar ist und mit Flügelschlitzen (44) versehen ist, wobei die Steuerscheibe (40) an dem Pumpenrad (30) vorgesehen ist, so dass die Pumpenflügel (32) in den Flügelschlitzen (44) aufgenommen sind, so dass die Flügelhöhe der Pumpenflügel (32) zischen der Radscheibe (34) und der Steuerscheibe (40) durch axiales Verschieben der Steuerscheibe (40) axial verstellbar ist, und
    einem Betätigungselement (70) zum Betätigen der Steuerscheibe (40),
    dadurch gekennzeichnet, dass
    das Antriebsrad (24) und das Pumpenrad (30) mit einer rohrförmigen Antriebswelle (28) verbunden sind, und die Steuerscheibe (40) über den Hohlraum in der Antriebselle (28) durch eine in der Antriebswelle (28) befindliche Betätigungsstange (74) betätigt ist, und die axiale Betätigung der Steuerscheibe (40) durch ein elektromagnetisches Betätigungselement (70) bewirkt ist, welches die Betätigungsstange (74) bei Bestromung zieht oder schiebt.
  2. Mechanische Kühlmittelpumpe (10) nach Anspruch 1, bei welcher die Betätigungsstange (48) durch eine Vorspannfeder (52) axial vorgespannt ist, vorzugsweise in eine Failsafe-Position vorgespannt ist.
EP09170214.2A 2009-09-14 2009-09-14 Mechanische Kühlmittelpumpe zum Kühlen eines Verbrennungsmotors Not-in-force EP2299120B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP09170214.2A EP2299120B1 (de) 2009-09-14 2009-09-14 Mechanische Kühlmittelpumpe zum Kühlen eines Verbrennungsmotors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP09170214.2A EP2299120B1 (de) 2009-09-14 2009-09-14 Mechanische Kühlmittelpumpe zum Kühlen eines Verbrennungsmotors

Publications (2)

Publication Number Publication Date
EP2299120A1 EP2299120A1 (de) 2011-03-23
EP2299120B1 true EP2299120B1 (de) 2017-04-19

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ID=41515999

Family Applications (1)

Application Number Title Priority Date Filing Date
EP09170214.2A Not-in-force EP2299120B1 (de) 2009-09-14 2009-09-14 Mechanische Kühlmittelpumpe zum Kühlen eines Verbrennungsmotors

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EP (1) EP2299120B1 (de)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103470359B (zh) * 2013-09-29 2015-09-09 长城汽车股份有限公司 用于发动机的水泵及具有其的发动机
AT517163B1 (de) 2015-05-13 2019-08-15 Bitter Eng & Systemtechnik Gmbh Kreiselpumpe
CN108119391B (zh) * 2016-11-30 2020-01-07 长城汽车股份有限公司 水泵以及车辆
CN115263763B (zh) * 2022-07-11 2023-05-16 长沙昌佳智慧流体科技有限公司 一种矿用多级离心泵

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1107886B (de) 1958-04-25 1961-05-31 Sucker G M B H Geb Vorrichtung zur AEnderung der Foerdermenge bei Stroemungsmaschinen
US4828455A (en) 1982-12-21 1989-05-09 Aisin Seiki Kabushiki Kaisha Temperature responsive blade shroud-disk for thermostatic water pump
JPH0622160Y2 (ja) 1986-09-30 1994-06-08 三菱自動車工業株式会社 ポンプ
US5169286A (en) 1989-03-09 1992-12-08 Yutaka Yamada Variable capacity centrifugal water pump with movable pressure chamber formed by impeller
DE19901123A1 (de) 1999-01-14 2000-07-20 Bosch Gmbh Robert Regelbare Radialpumpe, insbesondere zum Fördern eines Kühlmittels für ein Kraftfahrzeug
DE10247424A1 (de) 2002-10-11 2004-04-22 Daimlerchrysler Ag Verstellbares Pumpenlaufrad
DE10344309A1 (de) 2003-09-23 2005-04-21 Ticu Aci Förderpumpe
DE102005004315B4 (de) * 2005-01-31 2007-04-26 Geräte- und Pumpenbau GmbH Dr. Eugen Schmidt Regelbare Kühlmittelpumpe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

Also Published As

Publication number Publication date
EP2299120A1 (de) 2011-03-23

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