EP2236835B1 - Pompe de moteur - Google Patents

Pompe de moteur Download PDF

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Publication number
EP2236835B1
EP2236835B1 EP20100155912 EP10155912A EP2236835B1 EP 2236835 B1 EP2236835 B1 EP 2236835B1 EP 20100155912 EP20100155912 EP 20100155912 EP 10155912 A EP10155912 A EP 10155912A EP 2236835 B1 EP2236835 B1 EP 2236835B1
Authority
EP
European Patent Office
Prior art keywords
cavity
impeller
motor pump
blade portions
cleaning liquid
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
EP20100155912
Other languages
German (de)
English (en)
Other versions
EP2236835A1 (fr
Inventor
Akinobu Kubota
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.)
Koito Manufacturing Co Ltd
Original Assignee
Koito Manufacturing Co Ltd
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 Koito Manufacturing Co Ltd filed Critical Koito Manufacturing Co Ltd
Publication of EP2236835A1 publication Critical patent/EP2236835A1/fr
Application granted granted Critical
Publication of EP2236835B1 publication Critical patent/EP2236835B1/fr
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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F04D29/242—Geometry, shape
    • 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
    • F04D29/00—Details, component parts, or accessories
    • F04D29/18—Rotors
    • F04D29/22—Rotors specially for centrifugal pumps
    • F04D29/24—Vanes
    • F04D29/242—Geometry, shape
    • F04D29/245—Geometry, shape for special effects

Definitions

  • the present invention relates to a motor pump.
  • a headlamp cleaner having a part moved to be taken in and out from an opening formed on a vehicle body or on a bumper to thereby clean a front cover of a vehicle headlamp.
  • the headlamp cleaner includes a spray nozzle for ejecting cleaning liquid, and a cylinder having a supply pipe. Cleaning liquid supplied to the cylinder through the supply pipe is ejected from the spray nozzle toward the front cover of the vehicle headlamp to thereby clean the front cover.
  • Cleaning liquid is supplied to the cylinder by a motor pump.
  • a drive motor having a drive shaft is disposed inside the motor pump.
  • a suction pipe as a suction path for suctioning the cleaning liquid and an ejection pipe as a ejection path for feeding the suctioned cleaning liquid are provided in the motor pump.
  • the suction pipe is connected to a tank while the ejection pipe is connected to the supply pipe of the cylinder by a hose.
  • An impeller for performing suction and discharge of cleaning liquid is rotatably supported inside the motor pump. While cleaning liquid is suctioned from the tank into the motor pump, the cleaning liquid is fed from the motor pump to the cylinder in accordance with rotation of the impeller.
  • the impeller has a bearing portion connected to the drive shaft of the drive motor, and blade portions protruding from an outer circumferential surface of the bearing portion.
  • An example of such configuration is disclosed in JP-A-2006-299898 .
  • each of the blade portions provided in the impeller of the motor pump is shaped to have a curve which is displaced gradually between a direction of rotation of the impeller and a direction opposite thereto in a range of from the bearing portion to a tip of the blade portion.
  • each blade portion for pressing cleaning liquid to the ejection pipe side may become so low that liquid pressure for feeding the cleaning liquid may hardly be kept high, since each blade portion of the impeller is shaped to have a curve which is displaced gradually between a direction of rotation of the impeller and a direction opposite thereto in a range of from the bearing portion to the tip as described above.
  • US 2005/0191176 A1 considered as the closest prior art, relates to a rotor wherein there are at least three blades disposed between a front cover plate and a rear cover plate, the arc of the suction edge of at least one blade in the top view of the inlet side of the pumping medium following a sinusoidal path with a single turning point.
  • WO 2004/046558 A1 relates to a centrifugal pump with an impeller which is rotatable in a direction of rotation in a pump housing.
  • One of objects of the present invention is to provide a motor lamp for a headlamp cleaner capable to increase flow rate of cleaning liquid and to improve liquid pressure for feeding the cleaning liquid.
  • a motor pump including: a case having a cavity having an inner circumferential surface, the cavity being configured to temporary store liquid being suctioned therein; a suction pipe provided to serve as a suction path for suctioning the liquid into the cavity, the suction pipe having one end being provided with an inlet and the other end communicating with the cavity; an ejection pipe provided to serve as an ejection path for ejecting the liquid from the cavity, the ejection pipe having one end being provided with an outlet and the other end communicating with the cavity; a drive motor disposed inside the case, the drive motor having a drive shaft; and an impeller fixed to the drive shaft to be rotated inside the cavity and the suction pipe to suction and eject the liquid, wherein the impeller includes a bearing portion configured to be fixed to the drive shaft and blade portions protruding in radial direction from the bearing portion, wherein each of the blade portions includes a base portion formed to continue from the bearing portion and a tip portion formed to continue from the
  • a motor pump 1 has a case 2 and other components disposed inside the case 2.
  • the case 2 is configured by an upper-half case 3 and a lower-half case 4 which are combined vertically.
  • the upper-half case 3 is opened downward and has a cylindrical wall 5 having a cylindrical shape, and a top wall 6 formed to be continued from an upper edge of the cylindrical wall 5 so as to cover one end of the cylindrical wall 5.
  • the cylindrical wall 5 has a fitting groove 5a and a fitting protrusion 5b which are formed vertically and continuously so as to be located near a lower end of the cylindrical wall 5.
  • the top wall 6 is integrally provided with a connector portion 7 which protrudes upward from an upper surface of the top wall 6.
  • a connection terminal 7a is disposed inside the connector portion 7.
  • the lower-half case 4 is opened upward and has a cylindrical wall 8 formed to have a cylindrical shape, and a top wall 9 formed to be continued from a lower end portion of the cylindrical wall 8 so as to cover the lower end portion of the cylindrical wall 8.
  • the cylindrical wall 8 has a fitting protrusion 8a and a fitting groove 8b which are formed vertically and continuously so as to be located near an upper end of the cylindrical wall 8.
  • the cylindrical wall 8 is integrally provided with an ejection pipe 10 which protrudes laterally from a lower end portion of the cylindrical wall 8.
  • the ejection pipe 10 has one end (tip) at which an outlet 10a is formed, and the other end which communicates with a cavity (which will be described later) formed inside the case 2.
  • the top wall 9 is integrally provided with a suction pipe 11 which protrudes downward from a center portion of the top wall 9.
  • the suction pipe 11 has one end (lower end) at which an inlet 11a is formed, and the other end which communicates with the cavity formed inside the case 2.
  • the upper-half case 3 and the lower-half case 4 are combined with each other to form the case 2 in such a manner that the fitting protrusion 8a is fitted into the fitting groove 5a while the fitting protrusion 5b is fitted into the fitting groove 8b.
  • a spacer 12 is disposed inside the lower-half case 4 so as to be fitted to the lower-half case 4.
  • a shaft insertion hole 12a is formed in a center portion of the spacer 12 so as to pierce the spacer 12 vertically. Because the spacer 12 is disposed inside the lower-half case 4, an upper space 13 and a lower space 14 are formed as upper and lower parts respectively inside the case 2.
  • a drive motor 15 is disposed in the upper space 13.
  • the drive motor 15 is configured by drive coils and drive magnets.
  • the drive motor 15 has a drive shaft 15a which is formed in a center portion of the drive motor 15 so as to extend vertically. A part of the drive shaft 15a protrudes downward.
  • a rubber bush 16 is disposed in the lower space 14 so as to be located under the spacer 12.
  • the rubber bush 16 is fitted inside the lower-half case 4 and has a shaft support hole 16a which is disposed in a center portion of the rubber bush 16 so as to pierce the rubber bush 16 vertically.
  • the rubber bush 16 has a function of preventing cleaning liquid (which will be described later) from leaching out from the lower space 14 into the upper space 13.
  • the downward protruding part of the drive shaft 15a of the drive motor 15 is formed as follows.
  • the drive shaft 15a is inserted into the shaft insertion hole 12a of the spacer 12 and passes through the shaft support hole 16a of the rubber bush 16 so as to be supported by the shaft support hole 16a of the rubber bush 16.
  • a lower end portion of the drive shaft 15a protrudes downward from the rubber bush 16.
  • a portion of the lower case space 14 which is surrounded by an inner circumferential surface 8c of the cylindrical wall 8, a lower surface of the rubber bush 16 and an inner surface of the top wall 9 in the lower-half case 4 is formed as a cavity 14a in which cleaning liquid can be stored temporarily.
  • the other end of the ejection pipe 10 and the other end of the suction pipe 11 communicate with the cavity 14a.
  • An impeller 17 is disposed inside the cavity 14a and the suction pipe 11 so as to be supported rotatably (see Figs. 2 and 3 ). As shown in Figs, 2 to 4 , the impeller 17 is formed in such a manner that a bearing portion 18 is integrated with blade portions 19, 19 and 19 protruding in radial direction from the bearing portion 18.
  • a fixing hole 18a opened upward is formed in the bearing portion 18.
  • the blade portions 19, 19 and 19 are provided and positioned at regular intervals in a circumferential direction around the bearing portion 18.
  • Each of the blade portions 19, 19 and 19 is configured by a suction blade 20 protruding downward from the bearing portion 18 and a feed blade 21 protruding laterally from the bearing portion 18.
  • Each feed blade 21 is configured by a base portion 21a continued to the bearing portion 18 and a tip portion 21b continued to the base portion 21a.
  • the length of each base portion 21a in a laterally extending direction is set to be larger than that of a corresponding tip portion 21b.
  • each base portion 21a is shaped to have a gentle curve such as a substantially circular arc which is convexly curved toward a direction of rotation of the impeller 17 (a direction P1 shown in Figs. 3 to 5 ).
  • each tip portion 21b is shaped to have a gentle curve such as a substantially circular arc which is convexly curved toward a direction opposite to the direction P1 of rotation of the impeller 17.
  • the base portions 21a, 21a and 21a are shaped like circular arcs so that three reference lines T, T and T radiating at regular intervals from a center M of the bearing portion 18 are tangential to extensions Q, Q and Q of the base portions 21a, 21a and 21a at the center M. Accordingly, cleaning liquid can be prevented from staying stagnantly in the vicinity of bearing portion 18-side end portions of the base portions 21a, 21a and 21a, so that improvement in fluidity of cleaning liquid can be improved.
  • the impeller 17 is fixed in such a manner that a lower end portion of the drive shaft 15a of the drive motor 15 is inserted into the fixing hole 18a of the bearing portion 18.
  • the bearing portion 18 and the feed blades 21, 21 and 21 are disposed in the cavity 14a while the suction blades 20, 20 and 20 are disposed inside the suction pipe 11. Accordingly, the impeller 17 is rotated inside the cavity 14a and the suction pipe 11 by driving force of the drive motor 15.
  • the ejection pipe 10 is provided so that an axial direction of the ejection pipe 10 coincides with a direction tangential to the inner circumferential surface 8c, and that an outermost portion 10b of the inner surface of the ejection pipe 10 farthest from the center of rotation of the impeller 17 coincides with a line (S in Fig. 3 ) tangential to the inner circumferential surface 8c.
  • the impeller 17 is rotated by driving force of the drive motor 15.
  • cleaning liquid is suctioned from a not-shown tank into the cavity 14a through the suction pipe 11 by the suction blades 20, 20 and 20 so that the suctioned cleaning liquid is fed to a not-shown cylinder of the headlamp cleaner through the ejection pipe 10 by the feed blades 21, 21 and 21.
  • the cleaning liquid fed to the cylinder is ejected from a spray nozzle of the headlamp cleaner toward a front cover of a vehicle headlamp, so that the front cover is cleaned.
  • each feed blade 21 is shaped to have a gentle curve which is convexly curved toward the direction of rotation of the impeller 17 as described above, flow resistance is so low that cleaning liquid can flow easily from the bearing portion 18 side to the tip portion 21b side, and that the flow rate of cleaning liquid increases as the cleaning liquid moves from the base portion 21a side to the tip portion 21b side.
  • each feed blade 21 is shaped to have a gentle curve which is convexly curved toward a direction opposite to the direction of rotation of the impeller 17, the direction of a rotation-direction side surface 21c (see Fig. 3 ) of each tip portion 21b approaches a tangential line in the direction of rotation compared with the direction of a rotation-direction side surface of a corresponding base portion 21a. Accordingly, increase in flow rate of cleaning liquid and improvement in liquid pressure for feeding the cleaning liquid can be attained.
  • each feed blade 21 is shaped to have a gentle curve which is convexly curved toward a direction opposite to the direction of rotation of the impeller 17, eddy currents of cleaning liquid which has flown from the base portion 21a side to the tip portion 21b side are adjusted so that velocity energy is efficiently converted into pressure energy in the vicinity of the tip portions 21b, 21b and 21b. Accordingly, increase in flow rate of cleaning liquid and improvement in liquid pressure for feeding the cleaning liquid can be attained.
  • the motor pump 1 is formed so that the respective tips of the feed blades 21, 21 and 21 in the impeller 17 are located near the inner circumferential surface 8c of the lower-half case 4 forming the cavity 14a, greater increase in flow rate of cleaning liquid in accordance with improvement in liquid pressure for feeding the cleaning liquid can be attained.
  • the motor pump 1 is formed so that the axial direction of the ejection pipe 10 coincides with a direction tangential to the inner circumferential surface 8c and that the portion 10b of the ejection pipe 10 coincides with a line tangential to the inner circumferential surface 8c. Accordingly, increase in flow rate of cleaning liquid and improvement in efficiency of liquid feeding operation can be attained.
  • the motor pump 1 is formed so that the impeller 17 is configured by three blade portions 19, 19 and 19. Because the number of the blade portions 19 is reduced to three as described above, resistance of cleaning liquid to the rotating impeller 17 can be reduced so that the load imposed on the drive motor 15 can be reduced.
  • the number of the blade portions 19 used in the impeller 17 of the motor pump 1 may not be limited to three.
  • the number of the blade portions 19 may be chosen in accordance with a desired pump design.
  • the motor pump 1 is used for a headlamp cleaner for ejecting the cleaning liquid to the headlamp of a vehicle.
  • the motor pump 1 may be widely used for variety of vehicle lamps including the headlamp or may be widely used for window washer unit for ejecting the cleaning liquid toward a windshield of a vehicle.

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

Claims (5)

  1. Pompe de moteur (1) comprenant :
    un carter (2) comportant une cavité (14a) ayant une surface circonférentielle intérieure (8c), la cavité (14a) étant configurée pour stocker temporairement un liquide aspiré dedans ;
    un tuyau d'aspiration (11) fourni pour servir de chemin d'aspiration pour aspirer le liquide dans la cavité (14a), le tuyau d'aspiration (11) ayant une extrémité pourvue d'un orifice d'entrée (11a) et l'autre extrémité communiquant avec la cavité (14a) ;
    un tuyau de refoulement (10) fourni pour servir de chemin de refoulement pour refouler le liquide de la cavité (14a), le tuyau de refoulement (10) ayant une extrémité pourvue d'un orifice de sortie (10a) et l'autre extrémité communiquant avec la cavité (14a) ;
    un moteur d'entraînement (15) disposé à l'intérieur du carter (2), le moteur d'entraînement (15) comportant un arbre d'entraînement (15a) ; et
    un impulseur (17) fixé sur l'arbre d'entraînement (15a) pour être mis en rotation à l'intérieur de la cavité (14a) et du tuyau d'aspiration (11) pour aspirer et refouler le liquide,
    dans lequel l'impulseur (17) comprend une partie de moyeu (18) configurée pour être fixée sur l'arbre d'entraînement (15a) et des parties de pale (19) faisant saillie dans une direction radiale depuis la partie de moyeu (18),
    dans lequel chacune des parties de pale (19) comprend une partie de base (21a) formée pour continuer depuis la partie de moyeu (18) et une partie d'extrémité (21b) formée pour continuer depuis la partie de base (21a),
    dans lequel la partie de base (21a) de chacune des parties de pale (19) est formée pour être courbée de manière convexe vers une direction de rotation de l'impulseur (17),
    caractérisé en ce que
    la partie d'extrémité (21b) de chacune des parties de pale (19) est formée pour être courbée de manière convexe vers une direction vers l'arrière opposée à la direction de rotation.
  2. Pompe de moteur (1) selon la revendication 1,
    dans laquelle l'impulseur (17) est formé pour avoir la partie d'extrémité (21b) de chacune des parties de pale (19) réglée pour tourner près de la surface circonférentielle intérieure (8c) de la cavité (14a).
  3. Pompe de moteur (1) selon l'une des revendications 1 et 2,
    dans laquelle une direction axiale du tuyau de refoulement (10) est réglée pour coïncider avec une direction tangentielle de la surface circonférentielle intérieure (8c) de la cavité (14a).
  4. Pompe de moteur (1) selon l'une des revendications 1 à 3,
    dans laquelle la cavité (14a) est formée pour être entourée par une paroi cylindrique comportant la surface circonférentielle intérieure (8c).
  5. Pompe de moteur (1) selon l'une des revendications 1 à 4,
    dans laquelle l'impulseur (17) comprend trois des parties de pale (19).
EP20100155912 2009-03-25 2010-03-09 Pompe de moteur Not-in-force EP2236835B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2009074012A JP5393217B2 (ja) 2009-03-25 2009-03-25 ヘッドランプクリーナーのモーターポンプ

Publications (2)

Publication Number Publication Date
EP2236835A1 EP2236835A1 (fr) 2010-10-06
EP2236835B1 true EP2236835B1 (fr) 2013-08-07

Family

ID=42332402

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20100155912 Not-in-force EP2236835B1 (fr) 2009-03-25 2010-03-09 Pompe de moteur

Country Status (3)

Country Link
EP (1) EP2236835B1 (fr)
JP (1) JP5393217B2 (fr)
CN (1) CN101846084B (fr)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5414627B2 (ja) 2010-06-07 2014-02-12 株式会社東芝 半導体発光装置及びその製造方法
CN104179727B (zh) * 2013-05-22 2019-02-05 德昌电机(深圳)有限公司 泵
CN106194756B (zh) * 2015-04-30 2020-02-14 浙江三花汽车零部件有限公司 离心泵制造方法
CN106194823B (zh) * 2015-04-30 2020-03-24 浙江三花汽车零部件有限公司 离心泵
US10584705B2 (en) 2015-04-30 2020-03-10 Zhejiang Sanhua Automotive Components Co., Ltd. Centrifugal pump and method for manufacturing the same
CN110352150B (zh) * 2017-03-24 2023-04-04 株式会社村上开明堂 清洗装置
CN110341653A (zh) * 2019-08-08 2019-10-18 温岭市华康汽车零部件有限公司 一种汽车雨刷喷水电机

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01159198U (fr) * 1988-04-22 1989-11-02
IT225647Y1 (it) 1991-05-22 1997-01-13 Zanussi Elettrodomestici Girante per pompa centrifuga
US7241114B2 (en) 2002-10-30 2007-07-10 Siemens Ag Rotor for a centrifugal pump
SE524642C2 (sv) 2002-11-19 2004-09-07 Volvo Lastvagnar Ab Centrifugalpump
NL1031687C2 (nl) * 2006-04-25 2007-10-26 Ihc Holland Ie Bv Centrifugaalpomp, alsmede rotor.
JP2008101553A (ja) * 2006-10-19 2008-05-01 Yamada Seisakusho Co Ltd ウォーターポンプのインペラ
JP5209907B2 (ja) * 2007-07-05 2013-06-12 株式会社小糸製作所 ヘッドランプクリーナ装置用モータポンプ

Also Published As

Publication number Publication date
JP5393217B2 (ja) 2014-01-22
CN101846084B (zh) 2014-07-16
EP2236835A1 (fr) 2010-10-06
JP2010223168A (ja) 2010-10-07
CN101846084A (zh) 2010-09-29

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