EP3759356B1 - Elektrische kühlmittelpumpe - Google Patents

Elektrische kühlmittelpumpe Download PDF

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Publication number
EP3759356B1
EP3759356B1 EP18825616.8A EP18825616A EP3759356B1 EP 3759356 B1 EP3759356 B1 EP 3759356B1 EP 18825616 A EP18825616 A EP 18825616A EP 3759356 B1 EP3759356 B1 EP 3759356B1
Authority
EP
European Patent Office
Prior art keywords
coolant
pump
pump housing
electric
housing
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.)
Active
Application number
EP18825616.8A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3759356A1 (de
Inventor
Conrad Nickel
Franz Pawellek
Jens Hoffmann
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.)
Nidec GPM GmbH
Original Assignee
Nidec GPM 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 Nidec GPM GmbH filed Critical Nidec GPM GmbH
Publication of EP3759356A1 publication Critical patent/EP3759356A1/de
Application granted granted Critical
Publication of EP3759356B1 publication Critical patent/EP3759356B1/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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5806—Cooling the drive system
    • 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
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • 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
    • F04D13/06—Units comprising pumps and their driving means the pump being electrically driven
    • F04D13/0653—Units comprising pumps and their driving means the pump being electrically driven the motor being flooded
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/5813—Cooling the control unit
    • 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
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • 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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/046—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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/58—Cooling; Heating; Diminishing heat transfer
    • F04D29/586—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps
    • F04D29/588—Cooling; Heating; Diminishing heat transfer specially adapted for liquid pumps cooling or heating the machine
    • 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
    • F04D29/70—Suction grids; Strainers; Dust separation; Cleaning
    • F04D29/708—Suction grids; Strainers; Dust separation; Cleaning specially for liquid pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
    • F04D7/00—Pumps adapted for handling specific fluids, e.g. by selection of specific materials for pumps or pump parts
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05B—INDEXING SCHEME RELATING TO WIND, SPRING, WEIGHT, INERTIA OR LIKE MOTORS, TO MACHINES OR ENGINES FOR LIQUIDS COVERED BY SUBCLASSES F03B, F03D AND F03G
    • F05B2260/00—Function
    • F05B2260/20—Heat transfer, e.g. cooling
    • F05B2260/232—Heat transfer, e.g. cooling characterised by the cooling medium

Definitions

  • the invention relates to an electric coolant pump, in particular for pumping coolant to cool an internal combustion engine of a vehicle.
  • EP0967707A2 discloses a pump in which electronics are cooled using the funding. A portion of the conveyance is conveyed through a channel, the conveyance flowing along a surface forming part of a heat sink of the electronic control unit. In the process, heat is dissipated from the circuitry in the electronic control unit first to the electronic control unit and then to the surface. The conveying medium flowing past then absorbs part of the heat from the surface.
  • the electric coolant pump has a pump impeller for accelerating the coolant to be pumped, a rotor shaft on which the pump impeller is mounted, an electric motor with a stator and a rotor for driving the rotor shaft, a control circuit for controlling the electric motor and a pump housing which contains at least the control circuit and picks up the electric motor.
  • the pump housing can be flowed through by the coolant to be pumped.
  • the coolant to be conveyed flows around the stator, the rotor and the control circuit.
  • the coolant to be pumped flows through the pump housing.
  • the pump impeller In addition to conveying the coolant in the actual cooling circuit (e.g. cooling circuit for cooling an internal combustion engine of a motor vehicle), the pump impeller generates a volume flow of the coolant through the pump housing.
  • the coolant therefore flows around the components arranged inside the pump housing, in particular the stator, the rotor and the control circuit. The waste heat generated by the components mentioned can be efficiently dissipated in this way.
  • the coolant flows not only around the stator and the rotor of the electric motor, but also around the control circuit.
  • the electronic components e.g. electronic circuit elements, printed circuit boards, etc.
  • the control circuit are in direct contact with the coolant to be pumped.
  • This direct contact leads to a particularly effective cooling of the control circuit.
  • the power density can be increased in this way, the structural volume can be reduced, the reliability can be improved and/or the service life can be increased.
  • the control circuit can be designed as an electronic control unit (Electric Control Unit - ECU).
  • an inflow opening for the coolant to be pumped to flow into the pump housing can be formed in the pump housing.
  • Such an inflow opening enables the defined supply of coolant.
  • the direction of flow and the volume of flow can be determined by the Dimensioning and the position of the inflow opening can be adjusted accordingly.
  • the formation of the inflow opening in the housing wall facing the pump impeller is particularly advantageous. As a result, the flow movement of the coolant to be conveyed, generated by the pump impeller, can directly ensure a movement of the coolant within the pump housing.
  • the inflow opening is provided with a filter element for filtering the inflowing coolant.
  • a filter element for filtering the inflowing coolant. This protects the components arranged in the pump housing against dirt or damage caused by dirt that may be present in the cooling circuit. In this way, for example, the entry of particles that adversely affect the functioning of the rotor shaft bearing or the rotor can be prevented.
  • the pump housing is filled with a dielectric coolant as the coolant to be pumped.
  • Metal corrosion-inhibiting components are advantageously added to this cooling liquid. In this way, a largely maintenance-free, robust and long-lasting functionality of the coolant pump is guaranteed. At the same time, electrical malfunctions of the electric motor or the control circuit can be prevented.
  • the coolant pump can also have a plain bearing for mounting the rotor shaft in the pump housing.
  • the required installation space is also reduced.
  • the coolant pump can have a correspondingly compact design.
  • the pump housing can be made of a polymer material. Since the heat from the electric motor and the control circuit is dissipated via the coolant to be pumped, the heat dissipation capacity of the pump housing plays a subordinate role.
  • a metal housing can therefore be dispensed with and an inexpensive pump housing made of a polymer material can be used.
  • the pump housing in particular be made of a thermoplastic polymer material. This has the advantage that the material of the housing can easily be encapsulated around the stator. This simplifies the manufacture of the coolant pump.
  • electric coolant pump 1 is used to promote a coolant in a cooling circuit shown schematically.
  • This cooling circuit can be used, for example, to cool an internal combustion engine of a motor vehicle and essentially consist of cooling channels through which the coolant is fed to the components to be cooled and then to a heat sink (eg radiator). These cooling channels are not shown in detail in the drawings.
  • the coolant is a dielectric coolant with added metal corrosion inhibiting ingredients.
  • This coolant is circulated by a pump impeller 2 of the coolant pump 1 within the cooling circuit. The direction of movement of the coolant within the cooling circuit is indicated by arrows in the drawing figures.
  • the pump impeller 2 is mounted on a rotor shaft 3 .
  • This rotor shaft 3 in turn is mounted in a pump housing base body 5 via a slide bearing 4 .
  • a cylindrical inner wall is formed in the pump housing base body 5 , which serves as a support for the plain bearing 4 .
  • An electric motor 6 drives the rotor shaft 3 and thus the pump impeller 2 .
  • a rotor 7 of the electric motor 6 is flanged onto the rotor shaft 3 .
  • the rotor 7 is a pot-shaped or bell-shaped rotor 7, which is connected to the rotor shaft 3 with a first end area and surrounds the above-mentioned cylindrical inner wall radially on the outside with a second end area.
  • a stator 8 arranged in a torque-proof manner with the pump housing base body 5 encloses the rotor 7 radially on the outside. The stator 8 sets the rotor 7 in rotation and in this way drives the pump impeller 2.
  • the pump housing base body 5 is essentially pot-shaped and, together with a housing cover 9, forms the pump housing 10.
  • the face of the pump housing base body 5 opposite the housing cover 9 is perforated by the rotor shaft 3, so that the pump impeller 2 is outside of the pump housing 10, but in the immediate vicinity and parallel to the above-mentioned end face within the cooling circuit (ie in particular within a cooling channel).
  • an inflow opening 11 is formed, which is provided with a filter 12 for filtering the inflowing coolant.
  • the inflow opening 11 is arranged in such a way that it lies within the area of a projection of the pump impeller 2 perpendicular to the end face.
  • control circuit 13 of the electric motor 6 is arranged in the end area of the pump housing 10 opposite the pump impeller 2, i.e. in the area of the housing cover 9, a control circuit 13 of the electric motor 6 is arranged.
  • the control circuit 13 is formed as an ECU. In this case, the electronic components of the control circuit 13 are oriented in the direction of the interior of the pump housing 10 .
  • the pump housing 10 is designed to be fluid-tight with respect to the atmosphere, so that the coolant located within the pump housing 10 does not get into the environment can escape.
  • the pump housing body 5 and the housing cover 9 are made of a thermoplastic polymer material.
  • the coolant circulates in the cooling circuit through the impeller 2
  • part of the coolant is introduced through the inflow opening 11 into the pump housing 10
  • the coolant flow of the coolant within the pump housing 10 is also shown by arrows in the drawing figures.
  • the introduced coolant flows around the stator 8, the control circuit 13 and the rotor 7 in particular, in order to then leave the pump housing 10 in the region of the plain bearing 4 again.
  • the rotor 7, the stator 8 and the electronic components of the control circuit 13 are thus in direct contact with the coolant to be conveyed. This direct contact leads to a particularly effective cooling of the components.
  • electric coolant pump 101 differs from that in 1 shown coolant pump 1 only by the formation of the rotor shaft bearing and by dispensing with the filter 12 in the feed opening 11. Instead of the slide bearing 4 from 1 the rotor shaft 3 is supported in this embodiment by a roller bearing 104 in the pump housing base body 5 .
  • 3 represents another sectional view of the in 1 illustrated electric coolant pump 1.
  • the inflow of the coolant via the cooling circuit is shown only schematically, shows 3 a housing closure 14 on the impeller side designed as a cover, which together with the pump housing base body 5 and the pump impeller 2 forms a specific configuration for a flow space for the coolant in the area of the coolant pump 1 .
  • an extension 15 is formed on the impeller-side housing end 14 , which serves as an axial bearing for the rotor shaft 3 . Together with the slide bearing 4, this extension 15 ensures a stable Bearing of the rotor shaft 3 and the pump impeller 2 mounted on the rotor shaft 3.
  • the axial bearing of the rotor shaft 3 is formed in the housing closure 14 on the impeller side.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
EP18825616.8A 2018-03-02 2018-12-13 Elektrische kühlmittelpumpe Active EP3759356B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102018104770.3A DE102018104770A1 (de) 2018-03-02 2018-03-02 Elektrische Kühlmittelpumpe
PCT/EP2018/084743 WO2019166118A1 (de) 2018-03-02 2018-12-13 Elektrische kühlmittelpumpe

Publications (2)

Publication Number Publication Date
EP3759356A1 EP3759356A1 (de) 2021-01-06
EP3759356B1 true EP3759356B1 (de) 2022-11-23

Family

ID=64755531

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18825616.8A Active EP3759356B1 (de) 2018-03-02 2018-12-13 Elektrische kühlmittelpumpe

Country Status (6)

Country Link
US (1) US11708843B2 (zh)
EP (1) EP3759356B1 (zh)
CN (1) CN111801501A (zh)
BR (1) BR112020017549A2 (zh)
DE (1) DE102018104770A1 (zh)
WO (1) WO2019166118A1 (zh)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102021214755A1 (de) * 2021-12-21 2023-06-22 Vitesco Technologies GmbH Gehäusevorrichtung für eine Fluidpumpe
WO2023150060A1 (en) * 2022-02-01 2023-08-10 Ticona Llc Polymer composition with a high degree of thermal shock resistance
CN114458608B (zh) * 2022-02-10 2024-01-30 瑞希特(浙江)科技股份有限公司 一种冷却效果突出的管道屏蔽电泵

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Also Published As

Publication number Publication date
CN111801501A (zh) 2020-10-20
US11708843B2 (en) 2023-07-25
EP3759356A1 (de) 2021-01-06
WO2019166118A1 (de) 2019-09-06
DE102018104770A1 (de) 2019-09-05
US20210003147A1 (en) 2021-01-07
BR112020017549A2 (pt) 2020-12-22

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