[go: up one dir, main page]

WO2016005089A1 - Ensemble pompe - Google Patents

Ensemble pompe Download PDF

Info

Publication number
WO2016005089A1
WO2016005089A1 PCT/EP2015/060943 EP2015060943W WO2016005089A1 WO 2016005089 A1 WO2016005089 A1 WO 2016005089A1 EP 2015060943 W EP2015060943 W EP 2015060943W WO 2016005089 A1 WO2016005089 A1 WO 2016005089A1
Authority
WO
WIPO (PCT)
Prior art keywords
face
thrust disc
driveshaft
pump assembly
journal portion
Prior art date
Application number
PCT/EP2015/060943
Other languages
English (en)
Inventor
James McHattie
Original Assignee
Delphi International Operations Luxembourg S.À R.L.
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 Delphi International Operations Luxembourg S.À R.L. filed Critical Delphi International Operations Luxembourg S.À R.L.
Priority to EP15723920.3A priority Critical patent/EP3167182A1/fr
Publication of WO2016005089A1 publication Critical patent/WO2016005089A1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/04—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps
    • F02M59/06—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by special arrangement of cylinders with respect to piston-driving shaft, e.g. arranged parallel to that shaft or swash-plate type pumps with cylinders arranged radially to driving shaft, e.g. in V or star arrangement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M63/00—Other fuel-injection apparatus having pertinent characteristics not provided for in groups F02M39/00 - F02M57/00 or F02M67/00; Details, component parts, or accessories of fuel-injection apparatus, not provided for in, or of interest apart from, the apparatus of groups F02M39/00 - F02M61/00 or F02M67/00; Combination of fuel pump with other devices, e.g. lubricating oil pump
    • F02M63/0001—Fuel-injection apparatus with specially arranged lubricating system, e.g. by fuel oil
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
    • F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
    • F04B53/00—Component parts, details or accessories not provided for in, or of interest apart from, groups F04B1/00 - F04B23/00 or F04B39/00 - F04B47/00
    • F04B53/16—Casings; Cylinders; Cylinder liners or heads; Fluid connections
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/02—Fuel-injection apparatus having means for reducing wear
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M2200/00—Details of fuel-injection apparatus, not otherwise provided for
    • F02M2200/03—Fuel-injection apparatus having means for reducing or avoiding stress, e.g. the stress caused by mechanical force, by fluid pressure or by temperature variations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M59/00—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps
    • F02M59/02—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type
    • F02M59/10—Pumps specially adapted for fuel-injection and not provided for in groups F02M39/00 -F02M57/00, e.g. rotary cylinder-block type of pumps of reciprocating-piston or reciprocating-cylinder type characterised by the piston-drive
    • F02M59/102—Mechanical drive, e.g. tappets or cams

Definitions

  • the present invention relates to a fuel pump assembly and more specifically to a thrust face for a drive shaft suitable for a diesel fuel pump.
  • fuel pumps are designed to accommodate a certain degree of axial loading during operation. Diesel fuel pumps could typically be required to accommodate an inward loading in the region of 50N to 150N.
  • thrust face to accommodate axial loading.
  • the thrust face could be formed by a machined surface inside the housing or cambox (e.g. an aluminium or steel surface), or alternatively by a separate thrust washer, formed of a low friction material such as PTFE.
  • a currently known fuel pump assembly 2 is illustrated in Figures 1 to 3.
  • the known pump assembly 2 comprises a housing 4, and a driveshaft 8.
  • the driveshaft 8 comprises a front journal portion 10, a cam portion 12, and a rear journal portion 14.
  • the rear journal portion 14 extends into a blind bore 16 provided in the housing 4.
  • the rear journal portion 14 stops short of an end face 40 of the blind bore 16, such that a gap 15 exists between an end face 34 of the driveshaft 8 and the end face 40 of the blind bore 16.
  • the driveshaft 8 is provided with a back leak circuit, comprising an axially extending central bore 18 and a radially extending bore 20 with which it communicates.
  • a thrust face 22 is provided to constrain axial movement of the driveshaft 8 during operation of the pump assembly 2.
  • the thrust face 22 is provided on a thrust washer 24 which is integral with a rear bearing 26.
  • the integral thrust washer 24 / rear bearing 26 component is shown in isometric cross-section in Figure 3.
  • prior art pump assemblies comprising a thrust washer provide a protected region in which debris particles from housing machining collects and cannot be washed out. Such debris is liberated during pump operation and can lead to seizure of the pump head. Such debris particles are often too large to leave the housing/cambox, and remain a risk for the life of the pump. Modifying the production process to allow pressing of the bearing into a housing which has been fully machined and washed free of debris adds production line time, complexity and expense.
  • the present invention comprises, in a first aspect, a fuel pump assembly comprising a housing and a driveshaft, the driveshaft comprising a rear journal portion which extends into a blind bore provided in the housing, wherein a thrust disc is provided between an end of the rear journal portion of the driveshaft and an end surface of the blind bore, such that in use of the pump assembly, axial loading of the driveshaft causes an end face of the rear journal portion to contact a first contact face of the thrust face.
  • the present invention solves the problems associated with prior art pump assemblies by removing the requirement for a thrust washer in the housing/cambox, whilst maintaining axial load capability of the pump assembly.
  • the present invention thereby provides a cheaper and simpler pump and thrust face arrangement.
  • a recess may be provided, projecting into the rear journal portion from the end face, and wherein the recess forms part of a back leak circuit.
  • the recess conveniently comprises a slot extending across the diameter of the end face of the rear journal.
  • the thrust disc may be formed of a hard metallic material or a ceramic material.
  • the first contact surface of the thrust disc may be coated with a low friction material.
  • the present invention comprises a thrust disc for use in a pump assembly, the thrust disc comprising a first contact face comprising a machined surface.
  • the present invention comprises a method of assembling the fuel pump assembly as above, the method including machining the first contact surface of the thrust disc, and assembling the pump assembly such that the thrust disc is positioned in the blind bore of the housing, between the end face of the blind bore and the end face of the rear journal portion.
  • the method may further comprising coating the first contact surface of the thrust disc with a low friction material.
  • Figure 4 is a cross-sectional partial view of a pump assembly in accordance with the present invention.
  • FIG. 5 is a detailed cross-sectional partial view of the pump assembly of Figure 4.
  • Figure 6 is an isometric partial view of the drive shaft of the assembly of
  • Figure 4 is an exploded isometric view of the assembly of Figure 4.
  • Figure 8 is an isometric partial view of the assembly of Figure 4.
  • the present invention comprises a pump assembly 102 (certain components of the pump assembly are not illustrated in Figure 4 for clarity), comprising a steel or aluminium housing 104, and a driveshaft 108 comprising a first end 130 and a second end 132.
  • the driveshaft 108 comprises a front journal portion 110 towards the first end 130, a rear journal portion 114 towards the second end 132, and a cam portion 112 between front journal portion 110 and the rear journal portion 114.
  • the rear journal portion 114 extends into a blind bore 116 provided in the housing 104.
  • a rear bearing 126 having a radial outer surface surrounds the rear journal portion 114.
  • the thrust disc 150 comprises two contact surfaces 152, 154, which are machined prior to insertion of the thrust disc 150 into the blind bore 116.
  • the end face 134 at the second end 132 of the driveshaft 108 is provided with a recess formed by a slot 162 (illustrated in Figures 6, 7 and 8), extending into the driveshaft 108 from the end face 134 and across the full diameter of the end face 134.
  • a first, axially extending bore 118 is provided in the drive shaft 108, and communicates with a second, radially extending bore 120 (only the entrance of which is shown in Figure 4).
  • the recess formed by the slot 162, the first bore 118, and the second bore 120 together form a back leak circuit through which a back leak flow of fuel drains to a fuel tank (not shown).
  • axial loading causes the end face 134 of the driveshaft 108 to contact with the first contact surface 152 of the thrust disc 150, thereby causing the second contact surface 154 of the thrust disc 150 to contact the end surface 140 of the blind bore 116 of the housing 104. Axial loading is thereby accommodated by the thrust disc 150.
  • any debris generated due to wear at the driveshaft 108 / thrust disc 150 interface does not pass over the radial surface of the rear bearing 126, or over any other components of the pump assembly 102 which are susceptible to damage by debris.
  • the thrust disc 150 is machined prior to insertion into the housing 104, any debris generated during machining of the thrust disc 150 is not trapped within the pump housing 104 and therefore cleanliness issues during production of the pump assembly 102 are avoided.
  • the thrust disc 150 could be formed of coated steel, hardened steel or other hard metal or ceramic material. Furthermore, either or both of the contact surfaces 152, 154 of the thrust disc 150 may be coated with a low friction material, thereby further increasing wear resistance of the interfaces.
  • the interfaces between the thrust disc 150 and the driveshaft 108 / blind bore 116 could, for example, be steel/steel, steel/aluminium, steel/ceramic, steel/PTFE, etc.
  • thrust disc first contact surface 152 thrust disc second contact surface 154 slot 162

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

La présente invention concerne un disque de butée métallique ou céramique pour un ensemble pompe à carburant diesel, situé entre une extrémité d'une partie de portée arrière d'un arbre d'entraînement, et une surface d'extrémité d'un trou borgne dans le carter, une charge axiale de l'arbre d'entraînement amenant une face d'extrémité de la partie de portée arrière à entrer en contact avec une première face de contact de la face de butée, un évidement comprenant une fente faisant saillie dans la partie de portée arrière à partir de la face d'extrémité, et l'évidement formant une partie d'un circuit de fuite arrière ; et un procédé d'assemblage d'un ensemble pompe comprenant le positionnement du disque de butée dans le carter.
PCT/EP2015/060943 2014-07-09 2015-05-19 Ensemble pompe WO2016005089A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP15723920.3A EP3167182A1 (fr) 2014-07-09 2015-05-19 Ensemble pompe

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB1412187.5A GB201412187D0 (en) 2014-07-09 2014-07-09 Pump assembly
GB1412187.5 2014-07-09

Publications (1)

Publication Number Publication Date
WO2016005089A1 true WO2016005089A1 (fr) 2016-01-14

Family

ID=51410846

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2015/060943 WO2016005089A1 (fr) 2014-07-09 2015-05-19 Ensemble pompe

Country Status (3)

Country Link
EP (1) EP3167182A1 (fr)
GB (1) GB201412187D0 (fr)
WO (1) WO2016005089A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5630708A (en) * 1993-12-28 1997-05-20 Zexel Corporation Radial piston pump for low-viscosity fuel
WO1999028620A1 (fr) * 1997-11-29 1999-06-10 Mannesmann Rexroth Ag Demarrage rapide d'une pompe haute pression au moyen d'un piston multiplicateur de pression
WO1999043947A1 (fr) * 1998-02-27 1999-09-02 Stanadyne Automotive Corp. Pompe d'alimentation en carburant a rappel dynamique du piston
WO2003048564A1 (fr) * 2001-12-01 2003-06-12 Robert Bosch Gmbh Pompe a piston radiaux a graissage force
WO2014063890A1 (fr) * 2012-10-25 2014-05-01 Robert Bosch Gmbh Pompe à carburant haute pression à alimentation de palier par des alésages de lubrification dans un arbre d'entraînement

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5630708A (en) * 1993-12-28 1997-05-20 Zexel Corporation Radial piston pump for low-viscosity fuel
WO1999028620A1 (fr) * 1997-11-29 1999-06-10 Mannesmann Rexroth Ag Demarrage rapide d'une pompe haute pression au moyen d'un piston multiplicateur de pression
WO1999043947A1 (fr) * 1998-02-27 1999-09-02 Stanadyne Automotive Corp. Pompe d'alimentation en carburant a rappel dynamique du piston
WO2003048564A1 (fr) * 2001-12-01 2003-06-12 Robert Bosch Gmbh Pompe a piston radiaux a graissage force
WO2014063890A1 (fr) * 2012-10-25 2014-05-01 Robert Bosch Gmbh Pompe à carburant haute pression à alimentation de palier par des alésages de lubrification dans un arbre d'entraînement

Also Published As

Publication number Publication date
GB201412187D0 (en) 2014-08-20
EP3167182A1 (fr) 2017-05-17

Similar Documents

Publication Publication Date Title
EP3755907B1 (fr) Pompe à liquide de refroidissement pourvue d'un dispositif palier optimisé et à bilan thermique amélioré
EP2663791B1 (fr) Pièce d'insertion pour garniture d'étanchéité d'arbre
WO2009125452A1 (fr) Turbocompresseur
DE60105464T2 (de) Dichtungsanordnung für einen Turbolader
EP3676484B1 (fr) Pompe de refroidissement optimisé selon l'utilisation
WO2019101471A1 (fr) Pompe à agent de refroidissement dont la structure est optimisée pour l'application et économie thermique amélioré
GB2576124A (en) Compliant abrasion resistant bearings for a submersible well pump
DE102011051650A1 (de) Axiale Wellenabdichtung
WO2014161522A2 (fr) Palier d'arbre à joint d'arbre
US10683874B2 (en) Multi-stage electric centrifugal compressor
CN209299038U (zh) 防漏油温升的电机
DE102019111038B4 (de) Motor
EP3167182A1 (fr) Ensemble pompe
EP4081713B1 (fr) Pompe conçue pour atténuer l'effet de tout entrechoquement de rotor et de stator et son procédé de fabrication
DE19960160B4 (de) Vorrichtung zur Optimierung der Spaltweite bei Kreiselpumpen
RU2307263C1 (ru) Насос центробежный (варианты)
US10227989B2 (en) Taper sleeve driver for thrust bearing
EP3318763B1 (fr) Étanchéité au vide, étanchéité double, système à vide et pompe à vide
DE102018123909A1 (de) Kompakt-Gleitlager mit Dichtungsanordnung und Wasserpumpe mit demselben
CH698902A2 (de) Axiallagerdichtung für einen Abgasturbolader.
US7189003B2 (en) Turbomachine
FR2599092A1 (fr) Pompe centrifuge a bagues d'usure pour rotors
CN111749897B (zh) 轴构件的结合结构及流体机械
JPS61190191A (ja) 車両用電動式燃料ポンプ
JP6012952B2 (ja) ころ軸受の製造方法

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15723920

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

REEP Request for entry into the european phase

Ref document number: 2015723920

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2015723920

Country of ref document: EP