WO2013056855A1 - Pompe à liquide de refroidissement réglable - Google Patents

Pompe à liquide de refroidissement réglable Download PDF

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Publication number
WO2013056855A1
WO2013056855A1 PCT/EP2012/054512 EP2012054512W WO2013056855A1 WO 2013056855 A1 WO2013056855 A1 WO 2013056855A1 EP 2012054512 W EP2012054512 W EP 2012054512W WO 2013056855 A1 WO2013056855 A1 WO 2013056855A1
Authority
WO
WIPO (PCT)
Prior art keywords
coolant pump
piston
release lever
pump according
impeller
Prior art date
Application number
PCT/EP2012/054512
Other languages
German (de)
English (en)
Inventor
Michael Weiss
Klaus Hahn
Original Assignee
Schaeffler Technologies AG & Co. KG
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 Schaeffler Technologies AG & Co. KG filed Critical Schaeffler Technologies AG & Co. KG
Priority to CN201280049508.XA priority Critical patent/CN103874858A/zh
Priority to US14/349,229 priority patent/US20140241864A1/en
Publication of WO2013056855A1 publication Critical patent/WO2013056855A1/fr

Links

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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/60—Control system actuates means
    • F05D2270/62—Electrical actuators

Definitions

  • the invention relates to a controllable coolant pump for a cooling circuit of an internal combustion engine, having a hollow bearing shaft received in a bearing sleeve, which carries a drive wheel at one end and is connected at its opposite end to an impeller having an abutment face at the end, wherein the space between stop surface and vane wheel is designed as a conveying cross section for a cooling medium and in the hollow bearing shaft a piston axially displaceable by an adjusting unit is arranged, which has at its outer end a guide plate, which has a projection for complete or partial closing of the conveyor cross section has depending on the position of the piston.
  • cooling water is pumped by means of a coolant pump in a closed circuit through cooling channels in the region of the cylinder for cooling the brake motor and then conveyed to an air-water cooler, where the heated water is cooled down again by means of the airstream.
  • the necessary for circulating the cooling water pump is usually connected via a belt with a pulley of the crankshaft of the internal combustion engine.
  • a generic controllable coolant pump is known.
  • a guide disk with a contour corresponding to the impeller is arranged between impeller and a stop surface, which is guided over the impeller and the stop surface connecting axial webs and axially displaceable by means of a piston placed within the hollow shaft by an actuator.
  • the guide disc has at its outer edge on a projection with which it covers a ring channel of a pump housing in dependence on the position between the impeller and stop surface.
  • the annular channel can be completely or partially covered, so that no cooling liquid is pumped through cooling channels.
  • the axial positioning of the piston takes place by means of a magnet.
  • the invention is therefore based on the object of specifying a controllable coolant pump whose controllability is improved, in particular during a cold start.
  • the invention provides, in the case of a controllable coolant pump of the type mentioned in the introduction, that the actuating unit has a release lever, which can be pivoted about an axis of rotation by means of an electromechanical actuating element, by means of which the piston can be axially positioned.
  • the controllability of the coolant pump can be substantially improved by providing a release lever which is coupled or connected or connectable on the one hand to the electromechanical actuator as drive and on the other hand to the piston.
  • the release lever may have a first lever arm and a second lever arm and is pivotable about an axis of rotation.
  • an operation ie an adjustment of the piston and thus a control of the delivery rate in a simple manner by the fact that the actuator acts on a lever arm of the release lever, whereby the release lever is pivoted about the axis of rotation.
  • the other lever arm adjusts the piston during pivoting, whereby the delivery cross section for the cooling medium is adjusted or changed.
  • the lever may have a single lever arm and be pivotable about a lever end.
  • the release lever is pivotally mounted on the bearing sleeve.
  • the release lever may preferably be arranged fixedly on the bearing sleeve, so that it is pivotable about its attachment point.
  • the attachment point is preferably designed as a bearing point.
  • the disengagement lever can either be fastened to the bearing sleeve in the vicinity of the actuating unit; alternatively, the disengagement lever can be fastened to a position of the bearing sleeve remote from the actuating unit at the opposite end of the bearing sleeve.
  • a thrust bearing is arranged.
  • the thrust bearing serves to decouple the rotational speed of the release lever and the piston.
  • the thrust bearing comprises two discs between which rolling elements are arranged.
  • the rolling elements can be replaced by another disc or the like.
  • a disc of the thrust bearing touches the second lever arm of the release lever, the other disc of the rolling bearing touches the piston, which may have a transverse pin or the like. If the piston rotates, the rotational movement is absorbed by the disc of the thrust bearing connected to the piston, as this disc is also rotated.
  • the second lever arm of the release lever has two spaced-apart end portions, which abut against the thrust bearing, in particular on a disc of the thrust bearing. It can be provided that the second lever arm of the release lever is fork-shaped and has an enlarged area between end portions of the fork, wherein the drive shaft and the piston are arranged in the interior of the bearing shaft.
  • the electromechanical actuator has an axially displaceable spindle acting on the release lever.
  • a spindle By means of a spindle, a particularly precise adjustment of the piston is possible, so that the delivery cross section for the cooling medium can be precisely controlled or regulated.
  • the spindle is coupled to a driven by an electric motor spindle nut.
  • the electric motor and the spindle nut are arranged stationary, upon rotation of the output shaft of the electric motor, the spindle nut is rotated, whereby the spindle is axially displaced.
  • the electric motor of the coolant pump according to the invention may have a meshing with the spindle nut pinion, in this way, a translation of the rotational speeds of the electric motor and the spindle can be realized.
  • a particularly failsafe variant of the controllable coolant pump results when it comprises a second, independent of the first electromechanical actuator electromechanical actuator for pivoting the release lever.
  • the second electromechanical actuating element can be actuated either as an alternative to the first electromechanical actuating element, on the other hand it can be used when the first electromechanical actuating element has a defect.
  • the coolant pump according to the invention may comprise a sensor for detecting the axial position of the piston.
  • the sensor is designed for contactless detection of the position.
  • FIG. 1 shows a conventional controllable coolant pump in a sectional view
  • Figure 2 shows a first embodiment of a coolant pump according to the invention in a sectional view
  • FIG. 3 shows the coolant pump shown in FIG. 2 with the piston deflected
  • Figure 4 is a cross-sectional view of the coolant pump shown in Figures 2 and 3;
  • FIG. 5 shows a second embodiment of a coolant pump according to the invention
  • FIG. 6 shows the coolant pump shown in FIG. 5 in the deflected state
  • Figure 7 is a cross-sectional view of the coolant pump shown in Figures 5 and 6;
  • Figure 8 shows a third embodiment of a coolant pump in a sectional view
  • FIG. 9 shows the coolant pump shown in FIG. 8 in the deflected state
  • FIG. 10 shows a further operating state of the coolant pump shown in FIGS. 8 and 9.
  • FIG. 1 shows a sectional view of a conventional coolant pump 1 with a bearing shaft 3 mounted in a pump housing 2, which carries a drive wheel 4 at one end and is firmly connected at its other end to an impeller (impeller) 5.
  • the front side, the impeller 5 has a stop surface 6, the space between the stop surface 6 and impeller 5 is designed as a conveyor cross-section for a cooling medium, in particular cooling water.
  • axially displaceable piston 7 is arranged, which has at its outer end a guide plate 8, which has a projection 9 for complete or partial closing of the conveyor cross section in dependence of the position of the piston. 7 having.
  • FIG. 2 shows a coolant pump 1 1 in a sectional view.
  • a hollow bearing shaft 12 receives an axially displaceable piston 13.
  • the bearing shaft 12 is mounted by means of rolling bearings 14 in a bearing sleeve 15.
  • the coolant pump 1 1 comprises a release lever 16, which is pivotable about a rotation axis 17.
  • a first lever arm 18 of the release lever 16 is pivotable by means of an electromechanical actuator.
  • the electromechanical actuating element comprises an electric motor 19 whose output shaft 20 comprises a pinion 21 which meshes with a spindle nut 22.
  • a spindle 23 is axially displaced, one end of the spindle 23 acts on the first lever arm 18 of the release lever 16, whereby the release lever 16 is pivoted about its axis of rotation 17.
  • a second lever arm 24 of the release lever 16 acts on a thrust bearing 25 a.
  • the second lever arm 24 and the thrust bearing 25 are located within the bearing sleeve 15 in contrast to the first lever arm 18 of the release lever 16, which is located outside of the bearing sleeve 15. In the region of the axis of rotation 17, the bearing sleeve 15 has a recess which is penetrated by the release lever 16.
  • the thrust bearing 25 comprises a first disc 26, rolling elements 27 and a second disc 28, which is connected to a transverse pin 29, which passes through the piston 13 in the transverse direction.
  • the rolling elements 27 may be replaced by a disc in the simplest case.
  • FIG. 2 shows the coolant pump with the delivery cross section open and released, so that the coolant is pumped into cooling channels.
  • the electromechanical actuator is actuated.
  • the output shaft 20 of the electric motor 19 rotates the pinion 21, whereby the spindle nut 22 is rotated. Accordingly, the spindle 23 is displaced axially, in the view shown in Figure 2 to the left.
  • the release lever 16 is pivoted from the position shown in Figure 2 in the position shown in Figure 3.
  • the release lever 16 pivots about the axis of rotation 17.
  • the second lever arm 24 of the release lever 16 abuts against the disc 26 of the thrust bearing and pushes it in the view shown in Figure 3 to the right.
  • FIG. 4 shows a cross-sectional view of the coolant pump 11. It can be seen that the schematically illustrated second lever arm 24 of the release lever 16 is fork-shaped and touches the disc 26.
  • Figure 5 shows a second embodiment of a coolant pump in a sectional view. The structure and function of the coolant pump 30 shown in Figure 5 basically corresponds to that of the first embodiment, matching components and their operation will therefore not be explained again at this point.
  • the axis of rotation 31 of the release lever 32 is located at a position remote from the actuator position of the bearing sleeve 15.
  • the release lever 32 is articulated to a point opposite the actuator.
  • Figure 7 shows a cross-sectional view of the coolant pump 30, in which it is shown that the release lever 32 is fork-shaped and has a central region of increased diameter, wherein the bearing shaft 12 and the piston 13 are enclosed by the release lever 32.
  • the electric motor 19 is actuated. Accordingly, the spindle 23 is displaced to the right in the view shown in FIG.
  • the spindle 23 acts on the release lever 32 and pivots it about its axis of rotation 31 in a clockwise direction.
  • a central, to the thrust bearing 25 convexly curved portion 33 of the release lever 32 touches the thrust bearing 25 and moves it in the view shown in Figure 5 to the right. Because of the coupling of the thrust bearing 25 with the piston 13, this is pushed out of the bearing shaft 12 axially.
  • Figure 6 shows the coolant pump 30 after actuation by the actuator.
  • De release lever 32 has been deflected by the spindle 23 maximum, the thrust bearing 25 has been moved axially within the bearing sleeve 15 to the right. However, a further shift is prevented by the transverse pin 29. In this position of the piston 13, the conveyor cross section is closed, so that no coolant is conveyed.
  • FIGS. 8, 9 and 10 show a third exemplary embodiment of a coolant pump.
  • the coolant pump 34 is similar in its basic structure to the embodiment illustrated in FIGS. 5-7, which is why matching components will not be described again in detail.
  • the release lever 35 is pivotable about an axis of rotation 36, which is located outside of the bearing sleeve 15, at the end of the spindle 37.
  • FIG. 8 shows the coolant pump 34 in a basic position.
  • the adjustment of the piston 13 is analogous to the preceding embodiment by means of the electric motor 19 and the spindle 23.
  • the disengagement lever 35 moves the piston 3 via the thrust bearing 25 in the axial direction, in the view shown in Figure 8 right, whereby the conveyor cross section is reduced and optionally closed.
  • Figure 9 shows the coolant pump 34 at full deflection, the spindle 23, the release lever 35 and the piston 13 are displaced or deflected maximum. Since no coolant can be delivered in this state, a failure of the actuator, comprising the electric motor, the pinion, the spindle nut and the spindle 23, potentially dangerous for the internal combustion engine, since then there is a risk of overheating.
  • a second actuator is provided, which is constructed identically to the first actuator. Accordingly, the second actuator comprises an electric motor 38 which drives the spindle 37 via a pinion and a spindle nut.
  • a possible failure of the first actuator can be detected for example via a resistance measurement.
  • the position of a spindle can be detected by means of a position sensor.
  • a position sensor assigned to the piston 13 may also be provided.
  • a return in the initial state can take place by means of the second setting unit.
  • This condition is shown in FIG.
  • the spindle 37 was displaced axially by the electric motor 38, in the view shown in Figure 10 to the left.
  • the axis of rotation 36 forming the end of the release lever 35 has been moved to the left.
  • the second actuator with the electric motor 38 and the spindle 37 can take over the control of the coolant pump when the first actuator has failed.

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

Abstract

L'invention concerne une pompe à liquide de refroidissement réglable pour le circuit de refroidissement d'un moteur à combustion interne, comprenant un arbre de roulement creux placé dans une douille-palier, qui porte une roue d'entraînement à une extrémité et est relié de manière fixe avec un impulseur à l'extrémité opposée, ledit impulseur étant associé à une surface de butée située à l'avant. L'espace entre la surface de butée et l'impulseur forme une section de refoulement pour un liquide de refroidissement, et un piston déplaçable axialement par une unité de commande de position est disposé dans l'arbre de support creux, et comporte à son extrémité externe un disque de guidage qui présente une saillie dirigée vers l'impulseur, laquelle ferme partiellement ou totalement la section de refoulement en fonction de la position du piston. L'unité de commande de position comporte un levier de décalage (16, 32, 35) pouvant être amené à pivoter autour d'un axe de pivotement (17, 31, 36) par un élément de commande de position électromécanique, le pivotement dudit levier de décalage permettant le positionnement axial du piston (13).
PCT/EP2012/054512 2011-10-20 2012-03-15 Pompe à liquide de refroidissement réglable WO2013056855A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201280049508.XA CN103874858A (zh) 2011-10-20 2012-03-15 能调节的冷却介质泵
US14/349,229 US20140241864A1 (en) 2011-10-20 2012-03-15 Controllable coolant pump

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011084853.3 2011-10-20
DE102011084853A DE102011084853A1 (de) 2011-10-20 2011-10-20 Regelbare Kühlmittelpumpe

Publications (1)

Publication Number Publication Date
WO2013056855A1 true WO2013056855A1 (fr) 2013-04-25

Family

ID=45872937

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/054512 WO2013056855A1 (fr) 2011-10-20 2012-03-15 Pompe à liquide de refroidissement réglable

Country Status (4)

Country Link
US (1) US20140241864A1 (fr)
CN (1) CN103874858A (fr)
DE (1) DE102011084853A1 (fr)
WO (1) WO2013056855A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20160040584A1 (en) * 2014-08-05 2016-02-11 Schaeffler Technologies AG & Co. KG Electro-mechanical drive mechanism for an impeller shroud of a variable water pump
CN104265641A (zh) * 2014-09-09 2015-01-07 浙江海洋学院 一种流量可控的绞吸泵
US9882447B2 (en) 2015-06-09 2018-01-30 Regal Beloit America, Inc. Electric machine, assembly and associated method

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Publication number Priority date Publication date Assignee Title
DE2255503A1 (de) * 1972-11-13 1974-05-16 Heinz Knebel Einrichtung zur stufenlos regulierbaren ausstossmengen-regelung fuer kreiselpumpen, ventilatoren und geblaese
DE10344309A1 (de) * 2003-09-23 2005-04-21 Ticu Aci Förderpumpe
DE102008046424A1 (de) 2008-09-09 2010-03-11 Schaeffler Kg Regelbare Kühlmittelpumpe
DE102010025013A1 (de) * 2009-06-29 2011-01-05 Tcg Unitech Systemtechnik Gmbh Radialpumpe

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GB974958A (en) * 1962-09-03 1964-11-11 Dowty Fuel Syst Ltd Fluid metering device
CH578686A5 (fr) * 1974-10-03 1976-08-13 Charmilles Sa Ateliers
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US4754155A (en) * 1987-06-02 1988-06-28 Obermeyer Henry K Hydroelectric generator having retractable runner
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GB9323340D0 (en) * 1993-11-11 1994-01-05 Allied Signal Ltd Turbochargers for internal combustion engines
EP0654587B1 (fr) * 1993-11-19 1999-01-20 Holset Engineering Company Limited Turbine avec entrée à géométrie variable
CA2189379C (fr) * 1995-11-07 2002-01-01 Thomas W. Ramsay Rotor de pompe a pales reglables
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2255503A1 (de) * 1972-11-13 1974-05-16 Heinz Knebel Einrichtung zur stufenlos regulierbaren ausstossmengen-regelung fuer kreiselpumpen, ventilatoren und geblaese
DE10344309A1 (de) * 2003-09-23 2005-04-21 Ticu Aci Förderpumpe
DE102008046424A1 (de) 2008-09-09 2010-03-11 Schaeffler Kg Regelbare Kühlmittelpumpe
DE102010025013A1 (de) * 2009-06-29 2011-01-05 Tcg Unitech Systemtechnik Gmbh Radialpumpe

Also Published As

Publication number Publication date
CN103874858A (zh) 2014-06-18
DE102011084853A1 (de) 2013-04-25
US20140241864A1 (en) 2014-08-28

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