• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    ÅG W ÄBSTRACT Title: ELECTRIC FLÜID PUMP An electric water pump includes a housing (2), apropelling mechanisH1(3) diaposed in the housing (2), anda driving mechanism (4) far driving a driving ehaft (31)of the propeiling mechanism (3). The driving shaft (31)has a fluid passage (311) in fiuid communication with animpeller Chamber (23) and a Cooling Chamber (24) in th,housing (2). The prepelling' mechanism. (3) íurther includes a spiral rod (35) disnosed in the fluid passage f-~. 311) and ce~rotatable with the driving shaft (31), andah impeller (34) diaposed in the impeller Chamber (23),.nring operation ef the propelling mechanism (3), the impeller (34) drivas flow of a fiuid, and the spiral rod J-.z (ï5) co~rotates with the driving shaft (31) to change the I rate of the fluid flowing through the driving ehaft (31). (Figure 3)
    公开号:SE1251144A1
    申请号:SE1251144
    申请日:2012-10-09
    公开日:2013-11-11
    发明作者:Chin-Chen Chiu；Triven Lin；James Chien
    申请人:Ji Ee Industry Co Ltd；
    IPC主号:
    专利说明:

    the cooling chamber 116 and thereby dissipate heat from the rotor 13, the stator 15 and the electric control unit 16.
    The above-mentioned electric water pump has a disadvantage. That is, the velocity of the fluid flowing through the fluid passage 141 in the drive shaft 14 cannot be changed.
    When a change in the cooling effect is desired, it is necessary to adjust the cross-sectional area of the cooling duct 117, thereby creating difficulties in manufacturing and design. Furthermore, since the minority portion of the fl uiden fl flows into the cooling passage 117, when a change of the fl expression at the outlet 110 (i.e., the discharge fluid pressure) is desired, it is also necessary to adjust the cross-sectional area of the cooling passage 117.
    The object of this invention is to provide an electric fluid pump in which the cooling effect or discharge fluid pressure can be adjusted without changing the basic structure or specification, thereby resulting in convenience in use.
    According to the present invention, an electric fluid pump comprises: a housing comprising an outer housing wall and a compartment unit cooperating with said outer housing wall to define an impeller chamber, a cooling chamber and a cooling passage located between and in communication with said impeller chamber and said propeller chamber and said propeller chamber. drive shaft rotatably mounted on said compartment of said housing and having a fluid passage formed therein, an impeller located in said impeller chamber and connected to and co-rotatable with said drive shaft, and a coil rod placed in said fluid passage in said drive shaft and co-rotatable with said drive shaft, said the passage is located between and in fluid communication with said impeller chamber and said cooling chamber in said housing, and a drive mechanism for driving rotation of said drive shaft of said propeller mechanism, wherein when said drive shaft is rotated by said drive mechanism, said drive mechanism rotates impeller for driving fl uid to pass through said impeller chamber along a feed direction, and said helical rod rotates to change velocity of iden uid about flows through said fluid passage in said drive shaft.
    As such, by replacing the coil rod with a new one that has a different structure (eg different in the number of coil vanes or coil direction), the cooling effect or discharge expression can be changed without any change in basic structure or specification.
    These and other features and advantages of this invention will become apparent from the following detailed description of preferred embodiments of this invention, taken in conjunction with the accompanying drawings, in which: Fig. 1 is a cross-sectional view of a conventional electric water pump 1 shown in US 5,997,261; Fig. 2 is a top view of the first preferred embodiment of an electric fluid pump according to this invention, Fig. 3 is a cross-sectional view taken along the line III-III in Fig. 2, Fig. 4 is a top view of a casing body of the first preferred embodiment, Fig. 5 is a cross-sectional view of a second end cap of the first preferred embodiment, Fig. 6 is an exploded view of a drive shaft and a coil rod according to the first preferred embodiment, Fig. 7 is a view similar to Fig. 3 but illustrates the second embodiment of an electric fluid pump according to this invention, Fig. 8 is a cross-sectional view of a coil rod of the third embodiment of an electric fluid pump e according to this invention, and Fig. 9 is a view similar to Fig. 3 but illustrating the fourth embodiment of an electric fluid pump according to this invention.
    Before describing the present invention in more detail in connection with the preferred embodiments, it should be noted that similar elements and structures are designed by like reference numerals throughout the specification.
    Figs. 2 to 5, the first preferred embodiment of an electric fluid pump according to the present invention is adapted to drive a fluid to flow along a feed direction 29. The electric fluid pump 10 comprises a housing 2, a propeller mechanism 3, and a drive mechanism 4, which are located in the housing 2.
    The housing 2 comprises a housing body 201, a first end cap 202, and a second end cap 203 which are mounted on two opposite sides of the housing body 201. After mounting, the housing 2 comprises an outer housing wall 21, and a compartment unit 22 placed in the outer wall 21.
    The compartment unit 22 cooperates with the outer casing wall 21 to define an impeller chamber 23, a cooling chamber 24, a stator chamber 25 placed around the cooling chamber 24, a mounting chamber 26 located below the cooling chamber 24 and a cooling passage 27 placed between and in communication with the impeller chamber 23 and the cooling chamber 24. The impeller chamber 23 and mounting are located on two respective sides of the cooling chamber 24.
    The compartment unit 22 includes a first compartment 221 for dividing the impeller chamber 23 and the cooling chamber 24, a second compartment 222 for dividing the cooling chamber 24 and the mounting chamber 26, and a circular divider 223 located between the first and second compartments 221, 222, for dividing the cooling chamber 24 and the stator chamber 25. The first divider 221 is aligned with the housing body 201 and includes a first mounting heel 224 a plurality of angularly spaced first mounting heels 224. The second divider 22 is aligned with the second end cap 203, and includes a second mounting heel 226 and a plurality of angularly spaced second mounting blocks 227 located around the second mounting hole 226. The cooling passage 27 has a plurality of passage ports 271 each located between two adjacent first mounting blocks 225.
    The cooling chamber 24 has a main chamber portion 241 in communication with the passage ports 271, a bottom chamber portion 242 located below the main chamber portion 241, and a plurality of communicating portions 243 each located between two adjacent second mounting blocks 227. The communicating portions 243 are located between and in the main communication portion. 241 and the bottom chamber portion 242.
    Referring to Figs. 2, 3 and 6, the propeller mechanism 3 comprises a drive rod 31, a first bearing 32 placed around the first mounting blocks 225 of the first divider 221, a second bearing 33 placed around the second mounting blocks 227 of the second divider 222, an impeller 34 connected to and co-rotating with the drive shaft 31 and located in the impeller chamber 23 in the housing 2, and a helical rod 35 located in the fluid passage 311 in the drive shaft 31. the impeller 34 is rotatable to force flow into the impeller chamber 23 through an inlet 231. Thereby the fluid passes through the impeller chamber 23 and is discharged through the outlet 232.
    The drive shaft 31 further has a surrounding wall 312 defining the fluid passage 311. An outer surface of the surrounding wall 312 has an external sheath portion 313. The fluid passage has a first passage end 314 adjacent a central low pressure surface his impeller chamber 23 and a second passage end 315 adjacent the second divider. 222. The coil rod 35 is positioned in the fluid passage 311 in the drive shaft 31 in a tight fit to be co-rotatable with the drive shaft 31. The coil rod 35 has a first rod end 351 adjacent the second passage end 315 of the fluid passage 311 in the drive shaft 31, and a second rod end 352 adjacent the first passage end 314 of the fluid passage 311 in the drive shaft 31. The helical rod 35 has a helical direction so that rotation of the helical rod 35 results in flow of fluid from the first rod end 351 to the second rod end 352.
    The drive mechanism 4 comprises a rotor 41 located in the main chamber portion 241 of the cooling chamber 24 in the housing 2, a stator 42 located in the stator chamber 25 in the housing 2, and an electrical control unit 43 located in the mounting chamber 26 in the housing 2 and electrically connected to the stator 42. The rotor 41 has an internally knurled central axial hole 411 which allows the drive shaft 31 to extend therethrough and engage the externally knurled portion 313 of the drive shaft 31, to allow co-rotation of the rotor 41 with the drive shaft 31.
    Using the electric pump, the drive shaft 31 of the propeller mechanism 3 is driven to rotate by the drive mechanism 4. Thereby, the impeller 34 rotates to force fluid to flow into the impeller chamber 23 in the housing 2 and through the impeller chamber 23 along the feed direction 29 for discharge. Underflow of fluid into the impeller chamber 23, a minority of flows into the main chamber 241 of the cooling chamber 24 through the cooling passage 27, and subsequently into the bottom chamber portion 242 through the communicating ports 10, the stator 42, the rotor 41, and the electrical control unit 43. are located in the vicinity of the cooling chamber 24, and since the first and second layers 32, 33 are surrounded by a collection of passage ports 271 and a collection of communicating ports 243, respectively, and are thereby immersed in the fluid, they can be cooled by the fluid.
    During rotation of the impeller 34, since the pressure of a portion of the impeller adjacent the central portion of the impeller 34 is less than that of the circumferential area of the impeller 34 adjacent to the portion of fluid, when the impeller enters the bottom chamber portion 242 of the cooling chamber 24, it flows into the impeller chamber. 23 through the fluid passage 311 the drive shaft 31. As such, due to the pressure differences described above, the fl uid returns from the cooling chamber 24 to the impeller chamber 23. More importantly, the coil rod 35 rotates with the drive shaft 31 to create a driving force to accelerate fl uid again from the cooling chamber 24 to the impeller chamber 23 through the fluid passage 311 in the drive shaft 31, thereby improving the cooling effect.
    Fig. 7 shows a second preferred embodiment of an electric fluid pump according to this invention, which is similar to the first preferred embodiment except for a modified coil rod 35. In this example, the coil direction of the coil rod 35 is changed to create a driving force which tends to drive flow of fluid from the first passage end 314 of the fluid passage 311 in the drive shaft 31 to the second passage end 315. Due to the changing spiral direction of the spiral rod 35, the cooling effect is reduced and a resistance to the flow of the fluid in the second passage end 315 is created to increase the outlet fluid pressure. described in the next paragraph.
    By use, the majority of the flow entering the inlet 231 flows into the outlet 232, and a minority of the flow flows through the cooling passage 27, the cooling chamber 24, and the fluid passage 311 to be returned to the impeller chamber 23. Since the spiral direction of the spiral rod 35 may result in a resistance to the flow of the fluid through the fluid passage 311, the velocity of the fluid flowing through the fluid passage 311 and the amount of fluid flowing into the outlet passage 311 can be reduced, thereby increasing the amount of fluid flowing from the inlet 231 to the outlet 232 and thereby increasing the outlet expression. That is, the more resistance, the greater the outlet expression. It should be noted that the angle of the coil rod 35 can also change the resistance.
    Fig. 8 shows another modified spiral rod, which has four spiral vanes 353 placed around a central axis (A) thereof. A change in the number of helical vanes 353 can also change the resistance.
    Referring to Fig. 9, in an alternative preferred embodiment, the housing 2 further comprises a third divider 228. The housing 2 comprises a cooling assist chamber 28 defined by the third divider 228 and the second divider and is located between the cooling chamber 24 and the mounting chamber 26. the third divider 228 has a convex and concave side surface 282 facing the cooling assist chamber 28 to improve the heat dissipation effect.
    In view of the above, by replacing the coil rod 35, the cooling effect or outlet fluid pressure can be adjusted without changing the basic structure or specification. Thus, the object of the invention is fulfilled.
    权利要求:
    Claims (8)
    [1] 1. : l. 16 -__.u An electric fluid pump cemprising: a nousing including an outer housing wall and apartitien unit coeperating with said.outer housing wallse as to define an impeller Chamber, a Cooling chamb.r, and a Cooling passage disposed between and in fluid communicatinn. with said_ impeller cnambsr and saideooling ehamber; a propeiling mechanism including a driving shaftdispssedretatablycuisaidpartitioninüixofsaidnensingand having a fiuid passage formed therethrough, animpelisr'dispesed:U1saicíimpeller"Chamberëdnícennsctsdtøfand co~retatablf:with.saidwiriving shaft, andasspiral rod.disposed in said fluitipassaqe in said.drivinq'shaft and co~retatable with said driving shaft, said fluidpassage being' disposedi betweenr and. in fluid communication_ with. said. impslleri Chamber and. saidCooling ehamber in said housing; and a driving mechanism for drifing rotation of saiddriving shaft ef said prepelling mechanism; wnerein, when said driving shaft is retated by saiddrivingnæchanism,saidinmellerrotatesåxzdriveezíluidto pass through said impeller Chamber along a deliverydirection, and saicíspiral_reCírotates to«ïnanqe@the.rateof the fluid flswinq through said fluid passage in saic driving shaft.
    [2] 2. The electric fluid pump as claimed in Claim.l, wnerein pm;QJE »iå- 13 said fluid passage has a first passage end adjaosnt to 1 said impeller Chamber in said housing, and a second passage end adjao nt to said oooling Chamber in saidhousing, said spiral rod.having a first rod.snd,adjacentto said second passage end of said.fluid passage in saiddrivingshaft,andaaseoondrodendadjaeenttosaidfirstpassage end.of said fluid passage in said driving shaftso that, when said driving shaft is rotated hy saiddrivingwmeohanism, said spiral rod rotatesixvdrive flowof the fluid from said second passage end of said fluidpassage to said first passage end.of said.flnid;oassage.
    [3] 3. The electric flnid pump as claimed in Ciaim 1, wherein said fluid passage nas a first passage end adjaoent to said impelier Chamber in said housing, and a secondpassage end adjacent to said Cooling ohamber in saidhousing, said spiral rod having a first rod_end.adjacehtto said first passage end of said flnid passage in saiddriving shaft, and a second rod end adjaoent to saidsecond passage end.of said finid passage in said drivingshaft such that, when said driving shaft is rotated hysaiddrivihgnmohanism,saidspiralrodrotatestocxeatea resistance to flow of the flf-:iifi fitom, said seffonci end of said fiuid passage to said first passage end ofsaid fluid nassage.
    [4] 4. The electric flnid pump as ciaimed in Ciaiail, whereinsaid spiral rod has a central axis and four spiral vanes disposed around said central axis. 14
    [5] 5. The electric fluid pump as claimed in Clainal, wherain: said housing furthsr includes a mounting Chamberandeastatorchambarthatiscüspcsedaroundsaidcooling Chamber; (13 aid_drivingznechanisnaincludes a rotor disposed insaid Cooling chambsr in said.housin., a stator disposadin said stator Chamber in said.housing, and.an electriccontrol unit disposed in said mounting chamber andeiectrically connsctad to said stater;saàdpartitiantnüiiofsaidhousingineiudeseafirstpartition for partitioning said impallar cnamber andsaid ceoling chambar, a second partition forpartitioning said Cooling Chamber and said møuntingChamber, andsn1annular'§artition disposad between said first and second. partitions for 1partitioning“ said Cooling Chamber and said stator Chamber, said first nartition having a first mounting hole permitting saiddriving snaft to axtond tharethrough, and a piuralityof spaced~apart first mounting blacks disposad aroundsaid first mounting hole, said second partition havinga sacond.mountinq hola parmittinq said_driving“shaft teextsnd therethrough, and a plurality of spacad~apart second mounting blocks disposed around said second mounting hola; and hearing forznountingosaidciriving shaft amønq said.first mounting blocks of said first partition, and a second lå 29 ON hearingfornmuntingeaiddrivingsnaftamongsaidsecondmountinq blocks of said second partition,F The electric fluid pump as claimed in Claim Q, whereinsaid. housingi further includes a Cooling assistingchamberii:fluid»:ommunicationvüifi1saicicoolirggcnamberand dieposed between said Cooling ohamber and saidmountinq ohamber, said partition unit of said housingfurther including a third partition for partition ngsaid<:ooling chamber*antisaid»:oolingwassistingwohamber,said third partition having a convex~and~concave sidesurface facing said cooiing assisting Chamber, The electric fluid pump ae claimed in Ciaimiß, whereinsaid rotor of said driving mechanisnahas en internallysplinedcentralaxialhoieformedtherethrough,andsaiddriving ahaft further has a surrounding wall definingeaidfluidpassage,saidsurroundingwallhavimqanoutersurface that has an externally'splined.portion engagingsaid internally spiined central axiai hole, so as toallow for co~rotation of said rotor with said drivin_Shšíft . The electric fluid pump as claimed in Ciaim_7, whereinsaid Cooling passage has a plnrality of passage portseach located between two adjaoent ones of said firstmounting blocks, said ooolin_ ohamber having a mainchamberportioniïlfluidcommunioationwithsaidpassageporto andjperiitting saio.rotor to be diaposed therein, a bottom cnamber portion, ano a plurality of 16 cømmunicating portions each located betwean twoadjacent ones of said sficond mßunting bløcks, saidcommunicating portions heing disposæd between and influid communication with said main Chamber portion and said bQttom_chamb@r portion.
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    同族专利:
    公开号 | 公开日
    US20130302142A1|2013-11-14|
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    CN106151054B|2015-03-26|2019-12-13|浙江三花汽车零部件有限公司|Electrically driven pump|
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    TWI642349B|2017-12-15|2018-11-21|雙鴻科技股份有限公司|Pump module|
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    法律状态:
    2017-08-08| NAV| Patent application has lapsed|
    优先权:
    申请号 | 申请日 | 专利标题
    TW101116686A|TWI486525B|2012-05-10|2012-05-10|
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