US20140169960A1 - Fuel pump - Google Patents

Fuel pump Download PDF

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Publication number
US20140169960A1
US20140169960A1 US14/232,119 US201114232119A US2014169960A1 US 20140169960 A1 US20140169960 A1 US 20140169960A1 US 201114232119 A US201114232119 A US 201114232119A US 2014169960 A1 US2014169960 A1 US 2014169960A1
Authority
US
United States
Prior art keywords
impeller
pump
fuel
casing
series
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.)
Abandoned
Application number
US14/232,119
Other languages
English (en)
Inventor
Yutaro Hamatani
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.)
Mitsubishi Electric Corp
Original Assignee
Mitsubishi Electric Corp
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 Mitsubishi Electric Corp filed Critical Mitsubishi Electric Corp
Assigned to MITSUBISHI ELECTRIC CORPORATION reassignment MITSUBISHI ELECTRIC CORPORATION ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: HAMATANI, YUTARO
Publication of US20140169960A1 publication Critical patent/US20140169960A1/en
Abandoned 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
    • F04D29/08—Sealings
    • F04D29/086—Sealings especially 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
    • F04D29/02—Selection of particular materials
    • F04D29/026—Selection of particular materials especially 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
    • F04D29/041—Axial thrust balancing
    • F04D29/0413—Axial thrust balancing hydrostatic; hydrodynamic thrust 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
    • F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
    • F04D29/051—Axial thrust balancing
    • 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
    • F04D29/188—Rotors specially for regenerative 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
    • F04D5/00—Pumps with circumferential or transverse flow
    • F04D5/002—Regenerative pumps
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2300/00—Materials; Properties thereof
    • F05D2300/40—Organic materials
    • F05D2300/43—Synthetic polymers, e.g. plastics; Rubber

Definitions

  • This invention relates to a fuel pump, and in detail, relates to a fuel pump having an impeller and a pump casing that rotatably accommodates the impeller.
  • Fuel pumps are known as devices for supplying a fuel in a fuel tank to an internal combustion engine (for example, a vehicle engine etc.).
  • the fuel pumps of this type generally have a pump section.
  • the pump section includes a casing and an impeller in a nearly disc-like shape that is rotatably accommodated in the casing.
  • a blade groove portion is circularly formed along the outer periphery of the impeller.
  • another blade groove portion is formed at a place corresponding to the blade groove portion formed at the suction side of the impeller.
  • pump passage are formed each extending from an upstream end to a downstream end along a rotating direction of the impeller in a region corresponding to each blade groove portion formed on the impeller.
  • the upstream end of the suction-side pump passage is communicated with the outside of the casing through a fuel suction opening
  • the downstream end of the discharge-side pump passage is communicated with the outside of the casing through a fuel discharge opening.
  • the fuel pumps upon rotation of the impeller, the fuel is sucked in the pump casing through the suction opening and the sucked fuel is introduced into the blade groove portions of the impeller and the pump passages.
  • a centrifugal force due to rotation of the impeller acts on the fuel sucked in the pump casing.
  • the fuel sucked in the pump casing flows along the pump passages to the downstream side thereof while being pressurized by the centrifugal force of the impeller, and is then discharged to the outside of the pump casing from the discharge opening.
  • This invention has been made in consideration of the above situation, and an object thereof is to provide a fuel pump that has a simple and low cost configuration, and that prevents increase in rotational resistance of the impeller and occurrence of trouble in the pump chamber, such as locking, to thereby achieve both ensuring the reliability and keeping the pump performance.
  • a fuel pump according to the invention is configured to include: an impeller in a disc-like shape; a casing comprising a pump cover and a pump body that rotatably accommodate the impeller; and a motor section that drives to rotate the impeller; wherein, on each of front and back faces of the impeller, a series of recesses being repeated in a circumferential direction is formed in a region that extends along the circumferential direction with a given distance apart inside from an outer periphery; wherein, on the pump cover facing to the front face of the impeller, a first groove is formed that extends in a region facing to the series of recesses of the impeller, from an upstream end to a downstream end; wherein, on the pump body facing to the back face of the impeller, a second groove is formed that extends in a region facing to the other series of recesses of the impeller, from an upstream end to a downstream end; wherein, in the casing, there are formed a fuel discharge opening that communicates between near the downstream
  • the fuel pump of the invention it is possible to provide a fuel pump that has a simple and low cost configuration, and that prevents increase in rotational resistance of the impeller and occurrence of trouble in the pump chamber, such as locking, to thereby achieve both ensuring the reliability and keeping the pump performance.
  • FIG. 1 is a longitudinal cross-sectional view showing a whole configuration of a fuel pump of Embodiment 1 of the invention.
  • FIG. 2 is a enlarged longitudinal cross-sectional view of a pump section shown in FIG. 1 .
  • FIG. 3 is a top view of an impeller according to Embodiment 1 of the invention.
  • FIG. 4 is a top view of a pump body, viewed from the side of the impeller, according to Embodiment 1 of the invention.
  • FIG. 5 is a top view of a pump cover, viewed from the side of the impeller, according to Embodiment 1 of the invention.
  • FIG. 6 is a partial cross-sectional view of the pump section 12 according to Embodiment 1 of the invention.
  • Embodiment 1 of the invention will be described with reference to FIG. 1 through FIG. 6 . Note that, in the respective figures, the same symbols represent the same or equivalent parts.
  • FIG. 1 is a longitudinal cross-sectional view showing a whole configuration of a fuel pump of Embodiment 1 of the invention.
  • the fuel pump 10 is configured with a motor section 70 and a pump section 12 .
  • the motor section 70 is provided with a housing 72 , a motor cover 73 , magnets 74 , 75 , and a rotor 76 .
  • the housing 72 is formed in a nearly cylindrical shape.
  • the motor cover 73 is fixed to the housing 72 by caulking inwardly an upper end 72 a of the housing 72 (up and down in FIG. 1 correspond to up and down of the fuel pump 10 , here).
  • a discharge port 73 a is formed that is open upward.
  • the magnets 74 , 75 are fixed to an inner wall of the housing 72 .
  • the rotor 76 has a main body 77 composed of a laminated core and a coil, etc., and a shaft 78 penetrating up and down through the main body 77 .
  • An upper end portion 78 a of the shaft 78 is rotatably mounted to the motor cover 73 byway of a bearing 81 .
  • a lower end portion 78 b of the shaft 78 is rotatably mounted to a pump cover 14 of the pump section 12 by way of a bearing 82 .
  • the motor section 70 since its configuration is similar to that of the conventional fuel pump, a more detailed description thereof is omitted here.
  • FIG. 2 shows a selectively enlarged view of the pump section shown in FIG. 1 .
  • the pump section 12 is provided with a casing 18 and an impeller 20 .
  • the impeller 20 is nearly in a disc-like shape.
  • a first series of blade grooves 20 b successively arranged in a circumference direction is formed circularly with a given distance apart from an outer periphery face 20 e . That is, the first series of blade grooves 20 b is apart from the outer periphery face 20 e of the impeller 20 by an outer periphery wall 20 d of the impeller 20 .
  • a second series of blade grooves 20 c successively arranged in a circumference direction is formed circularly in a place corresponding to the first series of blade grooves 20 b formed on the fuel-suction-side face of the impeller 20 (that is, in a region being apart by a given distance from the outer periphery face 20 e ).
  • the bottoms of the first series of blade grooves 20 b and the second series of blade grooves 20 c are communicated with each other through communication openings (omitted from the figure).
  • an engaging hole 20 a is formed that is a nearly D-letter like form in a cross section perpendicular to the shaft direction and that penetrates through the impeller in the thickness direction.
  • the shaft 78 is engaged with in the engaging hole 20 a .
  • the shaft 78 rotates so that the impeller 20 rotates.
  • the casing 18 comprises a combination of the pump cover 14 and a pump body 16 .
  • a concave portion 14 a is formed that is circular in planar view.
  • the diameter of the concave portion 14 a is approximately the same as the diameter of the impeller 20
  • the depth of the concave portion 14 a is approximately the same as the thickness of the impeller 20 .
  • the impeller 20 is rotatably fitted in the concave portion 14 a.
  • a second pump passage like a groove is formed that extends along a circumference direction in a region facing to the second series of blade grooves 20 c of the impeller 20 .
  • An upstream end 31 a of the second pump passage 31 is built near a place facing to an upstream end 30 a of a first pump passage 30 to be described later.
  • a fuel discharge opening 41 is formed.
  • the fuel discharge opening 41 extends from the second pump passage 31 to an upper face of the pump cover 14 (upper face in FIG. 1 ), to thereby communicate between the second pump passage 31 and the outside of the casing 18 (in exact detail, the inside of the housing 72 ).
  • a first pump passage 30 like a groove is formed that extends along a circumference direction in a region facing to the first series of blade grooves 20 b of the impeller 20 .
  • a fuel suction opening 40 is provided at the upstream end 30 a of the first pump passage 30 .
  • a vapor vent hole 30 c is formed that penetrates up and down (up and down in FIG. 1 ) through the pump body 16 .
  • a concave place 16 b is formed, and in the concave place 16 b , a thrust bearing 33 is disposed in the same axis as the shaft 78 .
  • the thrust bearing 33 receives and bears the thrust load of the rotor 76 .
  • the casing 18 comprised of the pump cover 14 and the pump body 16 is fixed to the housing 72 by caulking inwardly a lower end 72 b of the housing 72 , in a state where the impeller 20 is embedded in the concave portion 14 a of the pump cover 14 .
  • the lower end portion 78 b of the shaft 78 is being inserted and fitted in the engaging hole 20 a of the impeller 20 at a location lower than the location where being supported by the bearing 82 .
  • the thrust bearing 33 is interposed between the lower end of the shaft 78 and the pump body 16 .
  • the fuel pump 10 configured as described above, when a current flows through the rotor 76 so that the impeller 20 rotates, the fuel in a fuel tank (omitted from the figures) is sucked in the casing 18 through the fuel suction opening 40 .
  • the fuel sucked in the casing 18 firstly flows in the upstream end 30 a of the first pump passage 30 .
  • the fuel having flowed in the first pump passage 30 forms a swirling flow S between the first pump passage 30 and the first series of blade grooves 20 b by the rotation of the impeller 20 , to thereby be pressurized.
  • the fuel having flowed in the first pump passage 30 flows along the first pump passage 30 from the upstream end 30 a toward the downstream end 30 b while being pressurized by the rotation of the impeller. Then, the fuel discharged to the motor section 70 from the fuel discharge opening 41 formed at the downstream end of the second pump passage 31 , flows inside the motor section 70 , and then discharged to the outside of the fuel pump 10 from the discharge port 73 a formed on the motor cover 73 .
  • the aforementioned little clearance A in the shaft direction shown in FIG. 6 is one of the factors that largely affect the discharge performance of the fuel pump 10 . That is, when the clearance becomes broader, the swirling flow S is impaired from flowing smoothly and at the same time, a leakage loss in the casing 18 becomes increased, which results in reduction of the discharge amount of fuel discharged from the fuel discharge opening 41 . Namely, keeping and controlling the clearance as little as possible, is an extremely important issue for keeping the discharge performance of the pump. Meanwhile, the impeller 20 , which is made of a thermosetting or thermoplastic resin or like resin material, is known to cause its dimensional change (swelling) due to moisture absorption because the impeller 20 is generally used in its immersed state in the fuel as described above, at all times.
  • the impeller 20 with a shape having an outer ring portion 20 g as shown in FIG. 3 , and in particular, made of a thermosetting resin, has a characteristic that the swelling amount at a blade portion 20 f is larger than those at the other portions (a planar portion, the outer periphery portion 20 e ).
  • the above characteristic is focused, so that, on a portion of each slidable face inside the casing 18 , that is facing to the blade portion 20 f of the impeller, a recessed shape is formed that incorporates an expected swelling amount in advance.
  • the recessed shapes 35 , 36 in a micron order each incorporating an expected swelling amount of the impeller 20 are formed along the lines extending from these passages in the circumference direction, in other words, in seal portions provided between the upstream end 30 a and the downstream end 30 b and between the upstream end 31 a and the downstream end 31 b of the pump passages 30 and 31 , respectively, so that the clearances are partially enlarged.
  • the recessed shapes 35 , 36 formed on the inner faces of the casing 18 are formed on the pump body 16 and the pump cover 14 , respectively; however, the recessed shape may be formed on only either one of them.
  • the recessed shapes are formed only on the pump body 16 and the pump cover 14 , or on the impeller 20 , it is possible to use conventional components (parts) for the other portions.
  • the invention is well-suited to be applied to a fuel pump for supplying a fuel in a fuel tank to an internal combustion engine (for example, a vehicle engine etc.,)
  • an internal combustion engine for example, a vehicle engine etc.,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
US14/232,119 2011-10-13 2011-10-13 Fuel pump Abandoned US20140169960A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2011/073514 WO2013054412A1 (ja) 2011-10-13 2011-10-13 燃料ポンプ

Publications (1)

Publication Number Publication Date
US20140169960A1 true US20140169960A1 (en) 2014-06-19

Family

ID=48081489

Family Applications (1)

Application Number Title Priority Date Filing Date
US14/232,119 Abandoned US20140169960A1 (en) 2011-10-13 2011-10-13 Fuel pump

Country Status (8)

Country Link
US (1) US20140169960A1 (zh)
JP (1) JP5653531B2 (zh)
KR (1) KR20140021064A (zh)
CN (1) CN104040180A (zh)
DE (1) DE112011105737T5 (zh)
IN (1) IN2014CN02439A (zh)
TW (1) TWI464321B (zh)
WO (1) WO2013054412A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11371511B2 (en) * 2019-02-15 2022-06-28 Toyota Jidosha Kabushiki Kaisha Diagnostic apparatus for fuel pump

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015095938A1 (pt) * 2013-12-27 2015-07-02 Robert Bosch Limitada Unidade de distribuição de combustível
KR20180127842A (ko) * 2017-05-22 2018-11-30 삼성전자주식회사 다중 캐리어 시스템에서 셀의 송신 전력 조절 방법 및 장치
CN113423956B (zh) * 2019-01-16 2024-02-02 株式会社美姿把 非容积式泵和液体供给装置

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5429476A (en) * 1992-12-22 1995-07-04 Robert Bosch Gmbh Fuel pump
US5449269A (en) * 1993-06-01 1995-09-12 Robert Bosch Gmbh Aggregate for feeding fuel from a supply tank to internal combustion engine of motor vehicle
US6017183A (en) * 1996-08-29 2000-01-25 Robert Bosch Gmbh Flow pump
US6669437B2 (en) * 2001-10-04 2003-12-30 Visteon Global Technologies, Inc. Regenerative fuel pump with leakage prevent grooves
JP2007247634A (ja) * 2006-03-20 2007-09-27 Aisan Ind Co Ltd 燃料ポンプ
US20080085181A1 (en) * 2006-10-06 2008-04-10 Aisan Kogyo Kabushiki Kaisha Fuel pump
US20080253878A1 (en) * 2006-09-15 2008-10-16 Aisan Kogyo Kabushiki Kaisha Fuel pump

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3463356B2 (ja) * 1994-06-30 2003-11-05 株式会社デンソー ウエスコポンプ
JP2002168188A (ja) * 2000-09-20 2002-06-14 Mitsuba Corp 再生式ポンプ
US6890144B2 (en) * 2002-09-27 2005-05-10 Visteon Global Technologies, Inc. Low noise fuel pump design
DE10348008A1 (de) * 2003-10-15 2005-05-19 Siemens Ag Kraftstoffpumpe
JP2007056705A (ja) * 2005-08-22 2007-03-08 Aisan Ind Co Ltd 燃料ポンプ
JP2007211679A (ja) * 2006-02-09 2007-08-23 Mitsubishi Electric Corp 円周流ポンプ
JP2010144609A (ja) * 2008-12-18 2010-07-01 Mitsubishi Electric Corp 燃料ポンプ

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5429476A (en) * 1992-12-22 1995-07-04 Robert Bosch Gmbh Fuel pump
US5449269A (en) * 1993-06-01 1995-09-12 Robert Bosch Gmbh Aggregate for feeding fuel from a supply tank to internal combustion engine of motor vehicle
US6017183A (en) * 1996-08-29 2000-01-25 Robert Bosch Gmbh Flow pump
US6669437B2 (en) * 2001-10-04 2003-12-30 Visteon Global Technologies, Inc. Regenerative fuel pump with leakage prevent grooves
JP2007247634A (ja) * 2006-03-20 2007-09-27 Aisan Ind Co Ltd 燃料ポンプ
US20080253878A1 (en) * 2006-09-15 2008-10-16 Aisan Kogyo Kabushiki Kaisha Fuel pump
US20080085181A1 (en) * 2006-10-06 2008-04-10 Aisan Kogyo Kabushiki Kaisha Fuel pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11371511B2 (en) * 2019-02-15 2022-06-28 Toyota Jidosha Kabushiki Kaisha Diagnostic apparatus for fuel pump

Also Published As

Publication number Publication date
JPWO2013054412A1 (ja) 2015-03-30
DE112011105737T5 (de) 2014-07-31
TW201315894A (zh) 2013-04-16
JP5653531B2 (ja) 2015-01-14
WO2013054412A1 (ja) 2013-04-18
TWI464321B (zh) 2014-12-11
IN2014CN02439A (zh) 2015-08-07
KR20140021064A (ko) 2014-02-19
CN104040180A (zh) 2014-09-10

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Legal Events

Date Code Title Description
AS Assignment

Owner name: MITSUBISHI ELECTRIC CORPORATION, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:HAMATANI, YUTARO;REEL/FRAME:031951/0961

Effective date: 20131114

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION