EP3091233A1 - Pompe à eau électrique - Google Patents

Pompe à eau électrique Download PDF

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Publication number
EP3091233A1
EP3091233A1 EP15194087.1A EP15194087A EP3091233A1 EP 3091233 A1 EP3091233 A1 EP 3091233A1 EP 15194087 A EP15194087 A EP 15194087A EP 3091233 A1 EP3091233 A1 EP 3091233A1
Authority
EP
European Patent Office
Prior art keywords
water pump
shaft
electric water
rotor
coolant
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Withdrawn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
EP15194087.1A
Other languages
German (de)
English (en)
Inventor
Bong Sang Lee
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.)
Hyundai Motor Co
Original Assignee
Hyundai Motor Co
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 Hyundai Motor Co filed Critical Hyundai Motor Co
Publication of EP3091233A1 publication Critical patent/EP3091233A1/fr
Withdrawn legal-status Critical Current

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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
    • F04D29/04—Shafts or bearings, or assemblies thereof
    • F04D29/043—Shafts
    • 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
    • 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
    • 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
    • F04D13/0606—Canned motor 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
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/2261—Rotors specially for centrifugal pumps with special measures
    • F04D29/2272—Rotors specially for centrifugal pumps with special measures for influencing flow or boundary layer
    • 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
    • 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
    • F01P5/02—Pumping cooling-air; Arrangements of cooling-air pumps, e.g. fans or blowers
    • F01P5/04—Pump-driving arrangements
    • F01P2005/046—Pump-driving arrangements with electrical pump drive

Definitions

  • the present disclosure relates to an electric water pump. More particularly, the present disclosure relates an electric water pump having a wing portion in order to increase a flow of a coolant.
  • a water pump circulates coolant to an engine and a heater to cool the engine and heat a cabin.
  • the coolant flowing out from the water pump circulates through and exchanges heat with the engine, the heater and/or the radiator, and flows back in the water pump.
  • the water pump is connected to a pulley fixed to a crankshaft of the engine and is driven according to the rotation of the crankshaft (i.e., the rotation of the engine). Therefore, the coolant amount flowing from the mechanical water pump is determined according to rotational speed of the engine.
  • the coolant amount required in the heater and radiator is a specific value regardless of the rotational speed of the engine. Therefore, the heater and the radiator do not properly operate where the engine speed is slow. In order to operate the heater and the radiator normally, the engine speed must be increased. However, if the engine speed is increased, the fuel consumption of a vehicle is also increased.
  • the electric water pump is driven by a motor controlled by a control apparatus.
  • the electric water pump can determine the coolant amount regardless of the rotational speed, and can reduce required power by 60-70% as compared with the mechanical water pump.
  • the electric water pump is advantageous in view of packaging over the mechanical water pump.
  • a DC motor is normally used in the electric water pump, particularly a BLDC(Brushless DC) motor.
  • a controller which can control the BLDC motor is provided with the motor, and an electric circuit is built-in the inside of the controller. As the controller is operated, heat is generated in an electric device. Therefore, sufficient cooling therein is required in order to prevent overheating
  • the BLDC motor has a coolant line between a stator wound with a coil and a rotor with a permanent magnet.
  • a space between the stator and the rotor should be within a few millimeters so as to function. Because of such a space constraint, the amount of coolant that flows between the stator and the rotor is not sufficient, and the coolant flow is not smooth. Therefore, the heat produced in the electric water pump is difficult to remove therefrom.
  • the present disclosure has been made in an effort to provide an electric water pump to increase a flow of a coolant.
  • An exemplary embodiment of the present disclosure provides an electric water pump having a wing portion in order to increase a flow of a coolant and improve cooling performance.
  • the electric water pump may include a pump cover having an inlet through which coolant flows; a stator chamber having a stator generating a magnetic field according to a control signal; a rotor chamber having a rotor rotated by the magnetic field generated by the stator; a separation wall configured to separate the stator chamber from the rotor chamber; a shaft having a central axis, the shaft fixed to the rotor so as to rotate together with the rotor about the central axis; and an impeller fixed to a front portion of the shaft so as to rotate together with the shaft, the impeller pressurizing the coolant flowing through the inlet, wherein at least one wing portion is formed on a part (e.g surface, e.g.
  • the wing portion may be formed at a front or a rear end portion of the shaft.
  • the shaft may comprise a trunk portion extended through a center of the separation wall along the central axis; and an extending portion having a smaller diameter than the trunk portion and extended from a front portion or a rear portion of the trunk portion along the central axis, wherein the wing portion has at least one rotatable blade protruding from the front portion or the rear portion of the trunk portion so as to increase the flow of the coolant.
  • the wing portion may have at least one rotatable blade protruding outwardly in a radial direction from an exterior circumferential portion of the trunk portion or the extending portion so as to increase the flow of the coolant.
  • the wing portion may have a tapered shape which becomes narrow gradually in a radial direction, and have a sharp end portion.
  • the wing portion may comprise: at least one long blade configured to protrude from the exterior circumferential portion in a radially outward direction; and at least one short blade configured to protrude from the exterior circumferential portion in a radially outward direction, the at least one short blade having a smaller radius (e.g length in radial direction) of rotation than the long blade.
  • the at least one long blade and the at least one short blade mat be alternately arranged (along the circumference).
  • the electric water pump may further comprise a body having the stator chamber and the rotor chamber; and a driver case mounted at a rear end of the body, having a fixing member protruding in a forward direction so as to fix the separation wall thereto.
  • a separation space may be formed between a rear surface of the separation wall and a front surface of the driver case.
  • a front end portion of the fixing member may be disposed apart from the rear surface of the separation wall.
  • a direction which is left side of a drawing is referred to as "a front surface", “a front portion”, or “frontward”, and the opposite direction is referred to as "a rear side", “a rear portion” or “rearward”.
  • FIG. 1 is a cross-sectional view of an electric water pump according to an exemplary embodiment of the present disclosure.
  • An electric water pump 1 includes a pump cover 10, a body 30, a driver case 50 and a driver cover 70.
  • the body 30 is engaged to a rear end of the pump cover 10 so as to form a volute chamber 14 and a rotor chamber 35.
  • the driver case 50 is engaged to a rear end of the body 30 to form a stator chamber 45, and a driver cover 70 is engaged to a rear end of the driver case 50 to form a driver chamber 85.
  • an impeller 17 is mounted in the volute chamber 14, and the rotor 37 fixed to a shaft 100 is mounted in the rotor chamber 35.
  • a stator 47 is mounted in the stator chamber 45, and a driver 80 is mounted in the driver chamber 85.
  • the shaft 100 has a central axis x, and the rotor 37, as well as the shaft 100, rotate about the central axis x.
  • the stator 47 is disposed coaxially with the central axis x of the shaft 100.
  • the pump cover 10 is provided with an inlet 12 at a front end portion thereof and an outlet 15 at a side portion thereof.
  • the coolant flows in the electric water pump 1 through the inlet 12, and the pressurized coolant in the electric water pump 1 flows out through the outlet 15.
  • a slanted surface 3 is formed at a rear end portion 20 of the inlet 12 of the pump 1, and a rear end portion 20 is extended rearward from slanted surface 3.
  • the rear end portion 20 of the pump cover 10 covers a mounting portion 32 of the body 30 by fixing means such as a bolt B.
  • the slanted surface 3 is slanted with reference to the central axis x of the shaft 100.
  • the volute chamber 14 for pressurizing the coolant is formed in the pump cover 10, and the impeller 17 for pressurizing the coolant through the outlet 15 is mounted in the volute chamber 14.
  • the impeller 17 is fixed to a front end portion of the shaft 100 and rotates together with the shaft 100.
  • a bolt hole 29 is formed at a middle portion of the impeller 17 and a thread is formed at an interior circumference of the bolt hole 29.
  • An impeller bolt 28 inserted in the bolt hole 29 is threaded to the front end portion of the shaft 100 such that the impeller 17 is fixed to the shaft 100.
  • a washer w may be interposed between the impeller 17 and the impeller bolt 28.
  • the coolant flowing into the water pump 1 may be smoothly guided and performance of the water pump 1 may be improved as a consequence of disposing the centers of the impeller 17 and the rotor 37 (rotating elements of the water pump 1) and a center of the stator 47 (a fixed element of the water pump 1) on the central axis x.
  • the impeller 17 is divided into a plurality of regions by a plurality of blades 18.
  • the coolant flowing into the plurality of regions is pressurized by rotation of the impeller 17. Meanwhile, as marked by the arrow in FIG. 1 , the coolant flowing in the inlet 12 is delivered into the rotor chamber 35 via the impeller 17.
  • the body 30 has a hollow cylindrical shape that is opens to the rear, and is engaged to the rear end portion of the pump cover 10.
  • the body 30 includes an adapter 25, a separation wall 90, the stator chamber 45 and the rotor chamber 35.
  • the adapter 25 supports the separation wall 90 at a rear end portion.
  • a bearing mounting portion 26 protrudes rearward from the adapter 25, and a bearing is interposed between the bearing mounting portion 26 and the shaft 100 in order to make the shaft 100 smoothly rotate and to prevent the shaft 100 from being inclined.
  • a penetration hole 27 is formed at a middle portion of the adapter 25 such that the front end portion of the shaft 100 protrudes into volute chamber 14 through the penetration hole 27.
  • the impeller 17 is fixed to a front portion of the shaft 100. It is described in this specification that the impeller 17 is fixed to the shaft 100 by the impeller bolt 28. However, the impeller 17 may also be press-fitted to an exterior circumference of the shaft 100.
  • a connecting hole 34 is formed in the adapter 25 radially outward of the bearing mounting portion 26. Therefore, as marked by the arrow, the coolant flowing through the impeller 17 is delivered into the rotor chamber 35 through the connecting hole 34. In addition, the coolant flowing in the rotor chamber 35 passes through a gap 5 formed between the separation wall 90 and the rotor 37. Heat generated at the shaft 100, the rotor 37 and the stator 47 by operation of the water pump 1 is cooled by the coolant flow. Therefore, the durability of the water pump 1 may be improved. Further, floating materials in the coolant are prevented from accumulating in the rotor chamber 35.
  • the separation wall 90 is formed in a cup-shaped opened in the impeller 17 direction, and is interposed between the stator 47 and the rotor 37.
  • the stator 47 is disposed outwardly in a radial direction
  • the rotor 37 is disposed inwardly in a radial direction.
  • the separation wall 90 includes a front surface 91 forming a volute chamber 14 between the pump cover 10 and the front surface 91.
  • the front surface 91 of the separation wall 90 is provided with a first partition 92, and a second partition 93 formed sequentially from an exterior circumference to a center thereof.
  • the first partition 92 is engaged to the rear end portion 20 of the pump cover 10. Sealing means such as an O-ring O may be interposed between the first partition and the rear end portion 20 to prevent leakage of the coolant from the volute chamber 14.
  • the second partition 93 protrudes rearward from the front surface 91, and defines a boundary between the stator chamber 45 and the rotor chamber 35.
  • the stator 47 is mounted outwardly in the radial direction of the second partition 93.
  • the stator chamber 45 is formed at a radially outer portion of the separation wall 90, and the stator 47 is mounted in the stator chamber 45.
  • the stator 47 is fixed to the body 30, directly or indirectly, and generates a magnetic field according to a control signal that is obtained from an outside source.
  • the rotor chamber 35 is formed at a radially inner portion of the separation wall 90, and a supporting portion 60, rotor 37 and shaft 100 are mounted in the rotor chamber 35.
  • the supporting portion 60 is made of an elastic rubber material, and relieves the thrust of the shaft 100 exerted to the bearing 31. Meanwhile, when the supporting portion 60 is connected with the bearing 31 directly, a rotational friction may be generated between the bearing 31 and the supporting portion 60 of the rubber material, and may deteriorate performance of the water pump 1. Therefore, a thrust ring 65 is mounted between the bearing 31 and the supporting portion 60, and the rotation friction may be reduced.
  • the rotor 37 is fixed to the external circumference portion of the shaft 100 in a cylinder shape by, for example, a press-fit or weld.
  • the permanent magnet is mounted at the rotor 37, and the rotor 37 rotates by the magnetic field generated in the stator 47.
  • shaft 100 will be described in detail below.
  • FIG. 2 is an enlarged schematic diagram of a portion A
  • FIG. 3 is a perspective view of a wing portion that is applied to an electric water pump according to an exemplary embodiment of the present disclosure
  • FIG. 4 is a cross-sectional view of a wing portion that may be applied to an electric water pump according to an exemplary embodiment of the present disclosure.
  • shaft 100 may include a trunk portion 105, an extending portion 120 and a wing portion 110.
  • the trunk portion 105 may be extended in a center of the separation wall 90 along the central axis x.
  • the extending portion 120 may be extended from the trunk portion 105 forward or rearward in an axial direction which may have a smaller radius than the trunk portion 105.
  • At least one or more wing portions 110 may be provided on a front or rear portion of the shaft 100. If the shaft 100 rotates, the wing portion 110 rotates together with it.
  • the wing portion 110 is formed in a wing shape so as to create more flow of a fluid when the shaft 100 rotates.
  • the wing portion 110 may be extended in an axial direction from the front or rear side of the trunk portion 105, and may be extended from an exterior circumference of the extending portion 120 in a radially outward direction.
  • the wing portion 110 may be formed as a common blade, and it is well known to a person of ordinary skill in the art. Therefore, as the wing portion 110 rotates with rotation of the shaft 100, a kinetic energy generated by the wing portion 110 increases a flow of the fluid.
  • the water pump 1 may be cooled quickly by the coolant passing through the gap 5 between the shaft 100 and the separation wall 90.
  • the wing portion 110 may be in a shape integrally formed at the rear end portion of the shaft 100 in this specification, but the present disclosure is not limited thereto.
  • the wing portion 110 may also be disposed or formed at any part (e.g surface, e.g. outer surface) of the shaft 100, including the front end portion of the shaft 100 by which coolant flows.
  • the wing portion 110 may be provided to protrude from a lateral surface of the trunk portion 105 or the exterior circumference of the extending portion 120.
  • the wing portion 110 may include at least one long blade 111 and at least one short blade 112.
  • each long blade 111 may be formed at the exterior circumference of the extending portion 120 and may be more extended than the short blade 112 in a radially outward direction. Also, each short blade 112 may be disposed between each long blade 111.
  • each long blade 111 and each short blade 112 may be extended in a radially outward direction, a thickness of each blade may be thinned.
  • the long and short blades 111, 112 may be in a tapered shape.
  • the end portions of the long and short blades 111, 112 may be formed as a sharp shape. Therefore, lateral surfaces of each long blade 111 and each short blade 112 may be formed to be slanted, and the shaft 100 may rotate in order to increase the flow of coolant while minimally being affected by a torque resistance.
  • the driver case 50 is engaged to a rear end of the body 30 to form the stator chamber 45.
  • the driver case 50 may include a first fixing member 51 and a second fixing member 52 which may protrude forward in order to support the separation wall 90. A part of the separation wall 90 may be inserted between the first fixing member 51 and the second fixing member 52, and fixed therebetween.
  • Separation spaces D1, D2, and D3 may be formed between a rear surface of the separation wall 90 and a front surface of the driver case 50.
  • Each separation space D1, D2, and D3 may be formed between the rear end surface of the separation wall 90 and the front end surface of the driver case 50, between the rear surface of the separation wall 90 and a front end of the first fixing member 51, and between the rear surface of the separation wall 90 and a front end of the second fixing member 52.
  • These separation spaces D1, D2, and D3 prevent a vibration by the thrust of the shaft 100 from being exerted to driver 80 disposed at a rear of the driver case 50.
  • the driver cover 70 may be formed from the driver case 50 in an axial direction, andmay be in a disk shape.
  • the driver cover 70 is engaged to the driver case 50 by fixing means such as a bolt so as to form a driver chamber 85.
  • Sealing means such as a O-ring O may be interposed radially outward of the driver cover 70 to prevent foreign substances, such as dust, from entering the driver chamber 85.
  • the driver 80 controlling operations of the water pump 1 is mounted in the driver chamber 85.
  • the driver 80 includes microprocessors and a printed circuit board (PCB).
  • the driver 80 is electrically connected to a controller (not shown) disposed at an exterior of the electric water pump 1 and receives a control signal from the controller.
  • the shaft 100 rotates with a rotor 37 and is provided with the wing portion 110. Therefore, a flow of a coolant passing through the gap 5 between the shaft 100 and the separation wall 90 is increased. As a result, the electric water pump 1 may have a high cooling efficiency and performance level.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Power Engineering (AREA)
EP15194087.1A 2015-04-02 2015-11-11 Pompe à eau électrique Withdrawn EP3091233A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150046992A KR20160118612A (ko) 2015-04-02 2015-04-02 전동식 워터 펌프

Publications (1)

Publication Number Publication Date
EP3091233A1 true EP3091233A1 (fr) 2016-11-09

Family

ID=54539967

Family Applications (1)

Application Number Title Priority Date Filing Date
EP15194087.1A Withdrawn EP3091233A1 (fr) 2015-04-02 2015-11-11 Pompe à eau électrique

Country Status (4)

Country Link
US (1) US20160290364A1 (fr)
EP (1) EP3091233A1 (fr)
KR (1) KR20160118612A (fr)
CN (1) CN106050725A (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111699617B (zh) * 2018-02-08 2022-12-02 Lg伊诺特有限公司 电机
EP3803131A1 (fr) * 2018-06-08 2021-04-14 Pierburg Pump Technology GmbH Pompe à liquide de refroidissement électrique
IT201800009201A1 (it) * 2018-10-05 2020-04-05 Ind Saleri Italo Spa Gruppo pompa
RU189399U1 (ru) * 2019-01-25 2019-05-21 Акционерное общество "Электромашиностроительный завод "ЛЕПСЕ" Насос циркуляционный герметичный с гильзованным электродвигателем
CN111490635A (zh) * 2019-01-29 2020-08-04 青岛海尔智能技术研发有限公司 离心式制冷压缩机的电机冷却系统及离心式制冷压缩机
KR102271971B1 (ko) * 2019-11-15 2021-07-05 주식회사 유니크 전자식 워터 펌프
US11637484B2 (en) 2020-12-28 2023-04-25 Hanon Systems Cover retention

Citations (2)

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Publication number Priority date Publication date Assignee Title
US20040234395A1 (en) * 2003-05-20 2004-11-25 Makoto Hatano Magnetic coupling pump
DE102013007849A1 (de) * 2013-05-08 2014-11-13 Ksb Aktiengesellschaft Pumpenanordnung

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US2913988A (en) * 1956-04-06 1959-11-24 Fostoria Corp Motor driven pumps
DE3038031C2 (de) * 1979-10-09 1984-06-20 Nippondenso Co., Ltd., Kariya, Aichi Klauenpol-Wechselstromgenerator für Fahrzeuge
US5997261A (en) * 1997-10-31 1999-12-07 Siemens Canada Limited Pump motor having fluid cooling system
JP2003269378A (ja) * 2002-03-14 2003-09-25 San Medical Gijutsu Kenkyusho:Kk 遠心ポンプ
GB2388404B (en) * 2002-05-09 2005-06-01 Dana Automotive Ltd Electric pump
US20060245955A1 (en) * 2005-04-18 2006-11-02 Kiyotaka Horiuchi Canned pump
JP5370928B2 (ja) * 2010-01-14 2013-12-18 株式会社安川電機 モータ、およびそれを備える車両
US8496448B2 (en) * 2010-03-16 2013-07-30 Toyota Motor Engineering & Manufacturing North America, Inc. Pump assembly

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040234395A1 (en) * 2003-05-20 2004-11-25 Makoto Hatano Magnetic coupling pump
DE102013007849A1 (de) * 2013-05-08 2014-11-13 Ksb Aktiengesellschaft Pumpenanordnung

Also Published As

Publication number Publication date
CN106050725A (zh) 2016-10-26
US20160290364A1 (en) 2016-10-06
KR20160118612A (ko) 2016-10-12

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