EP2354552A2 - Dispositif pour une pompe et pompe à eau - Google Patents

Dispositif pour une pompe et pompe à eau Download PDF

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Publication number
EP2354552A2
EP2354552A2 EP11000402A EP11000402A EP2354552A2 EP 2354552 A2 EP2354552 A2 EP 2354552A2 EP 11000402 A EP11000402 A EP 11000402A EP 11000402 A EP11000402 A EP 11000402A EP 2354552 A2 EP2354552 A2 EP 2354552A2
Authority
EP
European Patent Office
Prior art keywords
impeller
drive shaft
pump
anchor
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.)
Withdrawn
Application number
EP11000402A
Other languages
German (de)
English (en)
Other versions
EP2354552A3 (fr
Inventor
Andreas Dr. Wolf
Rainer Dr. Krafft
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.)
Licos Trucktec GmbH
Original Assignee
Licos Trucktec 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 Licos Trucktec GmbH filed Critical Licos Trucktec GmbH
Publication of EP2354552A2 publication Critical patent/EP2354552A2/fr
Publication of EP2354552A3 publication Critical patent/EP2354552A3/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Withdrawn legal-status Critical Current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
    • 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
    • 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
    • F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
    • F04D13/026—Details of the bearings
    • 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
    • F04D13/024—Units comprising pumps and their driving means containing a coupling a magnetic coupling
    • F04D13/027—Details of the magnetic circuit
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/20—Mounting rotors on shafts

Definitions

  • EP 2 105 624 is an electromagnetically actuated coupling for a water pump of the cooling water circuit of an internal combustion engine with a drive wheel is known, which can be rotatably mounted in the area or on the water pump and with an armature disc which cooperates with a coil.
  • the coupling is constructed in such a way that a so-called “fail-safe" arrangement is provided in which a drive of a water pump via the coupling is possible even in the currentless state of the coil, for example if a failure of the electrical power supply takes place.
  • the invention has for its object to provide a device for a pump, in particular water pump of a motor vehicle with clutch assembly, so that a switchable pump with a compact structure is created.
  • the invention is based on a device for a pump of a motor vehicle, in particular a water pump, for example for the cooling water circuit of an internal combustion engine.
  • the pump includes a rotating impeller to be driven and a switchable clutch assembly for switchably connecting the impeller to a drive side.
  • the core of the invention lies in the fact that the impeller is rotatably mounted on a rotatable drive shaft, so that a relative movement between impeller and drive shaft can take place. This allows the impeller to turn on the drive shaft.
  • a clutch assembly at least partially in a simple manner in a pump, in particular within a pump housing.
  • the bearing of the impeller on the drive shaft can be done via roller bearings or plain bearings.
  • a cost-sliding bearing is used, since the operating time in which the impeller by a correspondingly switched clutch has a much lower speed than the drive shaft compared to the total service life is small. An eventual increased wear of a plain bearing compared to a rolling bearing is therefore manageable.
  • the impeller In an engaged state of the clutch, the impeller preferably has the speed of the drive shaft or an at least approximately rotational speed of the drive shaft. Ideally, however, there is no slippage between the drive shaft and impeller. In the disengaged state arises at least a relative speed between the impeller and a still rotating drive shaft. Preferably, the impeller is at a standstill or by prevailing friction forces in a state with a low towing speed.
  • the impeller is axially displaceable on the drive shaft.
  • a friction portion of the impeller cooperates by axial displacement with friction means, the rotatably mounted on the drive shaft are arranged.
  • an electromagnetic coil which acts in a current-fed state on a magnetically conducting armature element.
  • an anchor element is disposed within a pump housing.
  • the electromagnetic coil can also be arranged within the pump housing for a compact and inexpensive construction.
  • the armature element can be moved axially by an electromagnetic action of the coil, wherein the switching state of the impeller can be predetermined by an adjusting axial position of the armature element.
  • the impeller can be moved axially or the armature element moves a further element which acts on the impeller to produce a switching state.
  • non-rotatably on the drive shaft contact means in particular friction means are arranged for a force and / or positive connection, in particular adhesion with a friction portion on the on Drive shaft rotatable impeller are designed.
  • anchor element and the friction means are matched to one another such that a frictional engagement between the drive shaft and impeller in response to an axial position of the anchor element is formed.
  • a displacement member is provided, by means of which a contact portion, for.
  • Example of a friction section of the Impeller can be brought into frictional contact with the friction means.
  • the displacement member for example a spring, in particular a compression spring, in the axial direction on the impeller at a non-energized electromagnetic coil, so that a friction portion of the impeller is urged against friction means, which are rotatably connected to the drive shaft.
  • the armature element can be displaced axially in such a way that friction means which press resiliently against the impeller are lifted off from it, so that the pump impeller can rotate freely or substantially freely on the drive shaft.
  • the anchor element is arranged on the impeller.
  • the anchor element may be mounted on the suction side or on the side facing away from the suction side of the impeller.
  • a displacement member in particular a spring element can not energized electric coil, the impeller in a clutched state are urged.
  • an axial bearing stop is formed on the drive shaft for the impeller.
  • the bearing stop preferably has the functionality of a pivot bearing, so that in a case in which the pump impinges with axial compressive force on the bearing stop, and beyond, for example, no further frictional forces experienced by friction, even then can rotate freely.
  • the friction means on the drive shaft comprise a wedge member which is frictionally engageable with a friction portion of the impeller.
  • the impeller can be brought to the rotational speed of the drive shaft with a comparatively low axial displacement force by a "wedge gear effect" of a wedge-shaped friction surface via frictional engagement.
  • the device according to the invention is preferably used for pumps in a motor vehicle, in particular water pumps.
  • the preferred application is the water pump for the cooling water circuit.
  • a switchable cooling water pump allows the engine to reach operating temperature more quickly when it starts up from cold.
  • the cooling water circuit is switched off by disengaging the impeller in this phase of engine operation. As soon as the engine is then at the specified operating temperature, the impeller is coupled, whereby the cooling water circuit is started.
  • FIG. 1 Elements of a cooling water pump with coupling arrangement are shown within a pump housing, not shown.
  • the cooling water pump comprises a pump shaft 1, on which a pump wheel 2 is rotatably mounted via an axially and radially extending sliding bushing 3.
  • the radial section 3a of the sliding bush 3 can abut against a radial bearing stop 4, for example in the form of a steel disc.
  • a radial bearing stop for example in the form of a steel disc.
  • the impeller 2 is as in FIG. 1 illustrated, preferably formed as an impeller, which is surrounded by a correspondingly shaped housing (not shown).
  • a compression spring 5 with an engagement portion 6, which can cooperate positively and / or non-positively with the impeller 2.
  • a V-shaped or wedge-shaped groove 2a is annularly introduced into the impeller 2, in which the engagement portion 6 retracts to produce a frictional engagement between the correspondingly adapted engagement portion 6 and the groove 2a.
  • the engagement section 6 has form elements which fit into corresponding form elements in the V-shaped groove 2a, so that a positive connection is created in the engaged state.
  • a magnetically conductive anchor member 7, for example, a ring member is mounted, which cooperates with an electromagnet 8.
  • the solenoid 8 may be mounted inside or outside the pump housing. In an arrangement outside the pump housing, a magnetic passage must be ensured by the pump housing to the anchor member 7 in order to exert a magnetic force on the anchor member 7 when the solenoid 8 is energized.
  • stop elements for example in the form of finger-shaped stop members are provided which axially restrict an axial movement of the anchor member 7 at a tightening force by the electromagnet 8.
  • the electromagnet is subjected to a voltage which may be excessive in an initial period of time to pull the armature element against the electromagnet 8.
  • a voltage which may be excessive in an initial period of time to pull the armature element against the electromagnet 8.
  • the axial stop fingers, not shown, in the region of the compression spring 5 limit the axial travel of the anchor element 7, so that this can not come to rest on the electromagnet 8 when the electromagnet is energized.
  • FIG. 2 an embodiment is shown in which the wedge-shaped groove 2a and the engagement portion 6 is replaced by a wedge member 9 which cooperates with a mating cone-shaped recess 10 on the impeller 2.
  • the impeller 2 is displaced axially in the direction of the wedge member 9, whereby between the wedge member 9 and the conical recess 10 entstehz a frictional engagement.
  • the impeller 2 preferably runs at the same speed as the pump shaft. 1
  • the frictional torque between impeller 2 and wedge element 9 drives the impeller 2.
  • the impeller 2 is pulled over an armature element 13 arranged in or on the impeller 2 in the direction of the electromagnet 8, thereby releasing the transmission of force between the wedge element 9 and the conical recess 10.
  • the anchor element 13 may, for example, be cast into the impeller 2.
  • the impeller is pressed against the bearing stop 11, for example in the form of a steel disc, which is designed so that no or substantially no drive torque is transmitted to the impeller when rotating the pump shaft 1. In this case, the impeller is disengaged. There is no pumping action.
  • FIG. 3 an embodiment is shown, which is analogous to the embodiment of FIG. 2 operates, with the difference that the elements 8, 11, 12, 13 are transferred to the suction side, whereas the wedge member 9 and the matching cone-shaped recess 10 on the side facing away from the suction side 14 15 are arranged.

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)
EP11000402.5A 2010-01-26 2011-01-20 Dispositif pour une pompe et pompe à eau Withdrawn EP2354552A3 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102010005936A DE102010005936A1 (de) 2010-01-26 2010-01-26 Vorrichtung für eine Pumpe sowie Wasserpumpe

Publications (2)

Publication Number Publication Date
EP2354552A2 true EP2354552A2 (fr) 2011-08-10
EP2354552A3 EP2354552A3 (fr) 2016-01-27

Family

ID=43778465

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11000402.5A Withdrawn EP2354552A3 (fr) 2010-01-26 2011-01-20 Dispositif pour une pompe et pompe à eau

Country Status (3)

Country Link
US (1) US20110182757A1 (fr)
EP (1) EP2354552A3 (fr)
DE (1) DE102010005936A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016179619A1 (fr) * 2015-05-13 2016-11-17 Bitter Engineering & Systemtechnik Gmbh Pompe centrifuge à rotor coulissant

Citations (1)

* Cited by examiner, † Cited by third party
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016179619A1 (fr) * 2015-05-13 2016-11-17 Bitter Engineering & Systemtechnik Gmbh Pompe centrifuge à rotor coulissant

Also Published As

Publication number Publication date
US20110182757A1 (en) 2011-07-28
EP2354552A3 (fr) 2016-01-27
DE102010005936A1 (de) 2011-07-28

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