EP3306071B1 - Pompe haute pression de type plongeur piston et ensemble à haute pression et son manchon de plongeur - Google Patents

Pompe haute pression de type plongeur piston et ensemble à haute pression et son manchon de plongeur Download PDF

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Publication number
EP3306071B1
EP3306071B1 EP17195118.9A EP17195118A EP3306071B1 EP 3306071 B1 EP3306071 B1 EP 3306071B1 EP 17195118 A EP17195118 A EP 17195118A EP 3306071 B1 EP3306071 B1 EP 3306071B1
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EP
European Patent Office
Prior art keywords
plunger
cavity
pressure
sleeve
pressure assembly
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.)
Active
Application number
EP17195118.9A
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German (de)
English (en)
Other versions
EP3306071A1 (fr
Inventor
Jianhui Li
Jianxin Zhang
Qian MA
Rong Zhu
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.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of EP3306071A1 publication Critical patent/EP3306071A1/fr
Application granted granted Critical
Publication of EP3306071B1 publication Critical patent/EP3306071B1/fr
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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
    • F02M59/10—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
    • 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
    • F02M55/00—Fuel-injection apparatus characterised by their fuel conduits or their venting means; Arrangements of conduits between fuel tank and pump F02M37/00
    • F02M55/007—Venting means
    • 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
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • 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
    • F02M59/44—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston
    • F02M59/442—Details, components parts, or accessories not provided for in, or of interest apart from, the apparatus of groups F02M59/02 - F02M59/42; Pumps having transducers, e.g. to measure displacement of pump rack or piston means preventing fuel leakage around pump plunger, e.g. fluid barriers
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0421—Cylinders
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0439—Supporting or guiding means for the pistons
    • 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
    • F04B1/00—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders
    • F04B1/04—Multi-cylinder machines or pumps characterised by number or arrangement of cylinders having cylinders in star- or fan-arrangement
    • F04B1/0404—Details or component parts
    • F04B1/0443—Draining of the housing; Arrangements for handling leaked fluids
    • 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
    • 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
    • F04B53/162—Adaptations of cylinders
    • 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
    • F04B53/18—Lubricating

Definitions

  • the present invention relates to plunger sleeve.
  • Plunger-type high-pressure pumps are widely used in the field of high-pressure fuel pumps.
  • a camshaft pushes a plunger so as to pressurize fuel in a plunger cavity, and a control valve controls the supply of high-pressure fuel to the outside.
  • figs. 1 and 2 schematically show the basic structure of a plunger-type high-pressure pump in the prior art.
  • the plunger-type high-pressure pump 900 comprises a housing 90; a high-pressure assembly accommodating cavity 901 and a camshaft cavity 902 are provided in the housing 90, wherein the high-pressure assembly accommodating cavity 901 and the camshaft cavity 902 are in communication with each other.
  • a camshaft 92 is disposed in the camshaft cavity 902; a high-pressure assembly 91 is disposed in the high-pressure assembly accommodating cavity 901.
  • the high-pressure assembly 91 comprises a plunger sleeve 910, and a plunger 911 that is disposed in a plunger cavity 915 of the plunger sleeve 910 and is capable of reciprocating in the plunger cavity 915.
  • a driven element 93 is further disposed between the high-pressure assembly 91 and the camshaft 92; the driven element 93 is pushed by a cam on the camshaft 92, and thereby pushes the abovementioned plunger 911 to reciprocate in the plunger cavity 915.
  • a seal accommodating chamber 912 is provided on a lower side of the plunger sleeve 910; a plunger seal 913 is disposed in the seal accommodating chamber 912, and provides sealing between the plunger 911 and the plunger sleeve 910.
  • An oil storage groove 916 is disposed at the plunger sleeve 910, above the abovementioned seal accommodating chamber 912; the oil storage groove 916 is used for holding a portion of fuel located between the plunger 913 and the plunger sleeve 910, and guiding same to a fuel tank (not shown in the figures) through an oil drainage channel 917.
  • the oil drainage channel 917 is a channel drilled from outside the plunger sleeve 910 to the plunger cavity 915; a stopper 918 is needed to close the oil drainage channel 917 at one end thereof.
  • the plunger seal 913 is generally made of a plastics material, there is a possibility that fragments will form when the plunger 911 rubs against it at high speed, and there is a possibility that fragments will form if the temperature is too high when the oil storage groove 916 rubs against it at high speed; the oil storage groove 916 and the plunger seal 913 are relatively far apart, therefore the cooling effect of fuel on the plunger seal 913 is limited. Furthermore, the presence of the stopper will also result in complex processing steps and components.
  • EP 1975402 A1 discloses a high-pressure fuel pump, wherein the seal system consists of a combination of fuel-side seal for sealing of fuel and lubricating-oil-side seal for sealing of lubricating oil.
  • the fuel-side seal is composed of plastic-made seal ring and rubbery-elastomer-made O ring for backup of the seal ring.
  • the lubricating-oil-side seal consists of a single body of single-lip-type oil seal wherein rubbery-elastomer-made seal lip fitted to metal ring is arranged so as to face the lubricating oil side.
  • DE 10 2014 214291 A1 discloses a straight leakage channel or groove to return oil from directly above the plunger seal in addition to an upper ring channel higher above the seal for collecting oil leaking along the plunger.
  • the object of the present invention is to provide a plunger sleeve, which is structurally simple and convenient to form by processing.
  • the plunger sleeve of a high-pressure assembly is defined by the features of claim 1.
  • Advantageous embodiments are subject of the dependent claims.
  • the seal accommodating chamber is in communication with the oil drainage channel via an annular groove.
  • the other end of the oil drainage channel is in communication with the outside of the plunger-type high-pressure pump via an oil outlet.
  • a type of the high-pressure assembly characterized by comprising a plunger sleeve, a plunger that is disposed in a plunger chamber in the plunger sleeve and is capable of reciprocating in the plunger chamber, and a valve assembly disposed in a valve cavity in the plunger sleeve;
  • the plunger chamber is in communication with the valve cavity
  • a seal accommodating chamber is disposed on the plunger sleeve
  • a plunger seal is disposed in the seal accommodating chamber, to provide sealing between the plunger and the plunger sleeve
  • an oil drainage channel is further disposed on the plunger sleeve, the oil drainage channel having one end in communication with the seal accommodating chamber and another end in communication with the outside of the high-pressure assembly.
  • the seal accommodating chamber is in communication with the oil drainage channel via an annular groove.
  • the other end of the oil drainage channel is in communication with the outside of the high-pressure assembly via an oil outlet.
  • the present invention also provides a plunger sleeve having the features of claim 1.
  • an extended line of the central axis of the oil drainage channel does not intersect with a bottom end of the plunger sleeve, and the oil drainage channel is in communication with the seal accommodating chamber via an annular groove.
  • the oil drainage channel is in communication with a sealing ring accommodating chamber, and is therefore structurally simple and convenient to form by processing.
  • the plunger-type high-pressure pump 100 comprises a pump housing 20; a high-pressure assembly 30 and a camshaft 40 disposed in the pump housing 20; and a cam driven apparatus 50 located between the high-pressure assembly 30 and the camshaft 40.
  • a high-pressure assembly accommodating cavity 201 and a camshaft cavity 202 are provided in the pump housing 20; the high-pressure assembly accommodating cavity 201 and camshaft cavity 202 are in communication with each other, and arranged perpendicular to each other.
  • Two high-pressure assembly accommodating cavities are shown in fig.
  • the high-pressure assembly 30 is disposed in the high-pressure assembly accommodating cavity 201, the camshaft 40 is disposed in the camshaft cavity 202, and the camshaft 40 can drive the high-pressure assembly 30, by means of the cam driven apparatus 50, to perform pressurization.
  • the high-pressure assembly 30 comprises a plunger sleeve 31 fixed in the high-pressure assembly accommodating cavity 201; a plunger cavity 311 and a valve cavity 312 in communication with each other are provided in the plunger sleeve 31.
  • a plunger 32 is installed in the plunger cavity 311, a valve assembly 33 is disposed in the valve cavity 312, and a high-pressure cavity is formed between the plunger 32 and the valve assembly 33, at the top of the plunger cavity 311.
  • the plunger 32 can reciprocate in the plunger cavity 311 under the driving action of the cam driven apparatus 50, so as to perform oil suction and oil pressurizing operations.
  • the seal accommodating chamber 314 is connected to the oil drainage channel 315 via the annular groove 316.
  • the annular groove 316 could also be omitted, such that the seal accommodating chamber 314 is in direct communication with the oil drainage channel 315.
  • the plunger 32 is installed in the plunger cavity 311, and a plunger seal 34 is disposed in the seal accommodating chamber 314.
  • a plunger seal 34 is disposed in the seal accommodating chamber 314.
  • high-pressure fuel in the high-pressure cavity will partially drain into a gap between the plunger 32 and the plunger sleeve 31, thereby providing lubrication at this site.
  • fuel that has drained to the seal accommodating chamber 314 can also carry away some of the heat generated by friction between the plunger seal 34 and the plunger 32, and be discharged out of the plunger sleeve 31 through the oil outlet 317.
  • the oil drainage channel is in communication with a sealing ring accommodating chamber, and is therefore structurally simple and convenient to form by processing.
  • the robustness of the product is improved in two ways at the same time: the distance between the annular groove 316 and the plunger seal 34 is shortened, enhancing the cooling of the plunger seal 34 by fuel, lowering the operating temperature thereof and thereby reducing the speed of ageing thereof, to increase the lifespan; and enhancing lubrication between the plunger sleeve 31 and the plunger 32 at an upper part of the plunger seal 34, to reduce the risk of seizing.

Claims (8)

  1. Manchon de plongeur (31) d'un ensemble haute pression, comprenant :
    une cavité de plongeur (311) ;
    une cavité de soupape (312) en communication avec la cavité de plongeur (311) ;
    une chambre de réception de joint (314) formée au fond du manchon de plongeur (31) ;
    un joint de plongeur (34) disposé dans la chambre de réception de joint (314) ;
    un canal de drainage d'huile (315) formé dans le manchon de plongeur (31) et ayant une extrémité en communication avec la chambre de réception de joint (314) par le biais d'une rainure annulaire (316) et une autre extrémité en communication avec l'extérieur du manchon de plongeur (31) par le biais d'une sortie d'huile (317).
  2. Manchon de plongeur (31) selon la revendication 1, caractérisé en ce qu'une droite dans le prolongement de l'axe central du canal de drainage d'huile (315) n'intersecte pas une extrémité inférieure du manchon de plongeur (31).
  3. Pompe haute pression de type à plongeur (100), comprenant :
    un boîtier de pompe (20) avec une cavité de réception d'ensemble haute pression (201) et une cavité d'arbre à cames (202) prévues dans le boîtier de pompe (20) ;
    un ensemble haute pression (30) disposé dans la cavité de réception d'ensemble haute pression (201), l'ensemble haute pression (30) comprenant un manchon de plongeur (31) selon la revendication 1 ou 2 fixé dans la cavité de réception d'ensemble haute pression (201), un plongeur (32) qui est disposé dans la cavité de plongeur (311) du manchon de plongeur (31) et qui est capable d'aller et venir dans la cavité de plongeur (311), et un ensemble de soupape (33) disposé dans la cavité de soupape (312) du manchon de plongeur (31), le joint de plongeur (34) assurant une étanchéité entre le plongeur (32) et le manchon de plongeur (31), et le canal de drainage d'huile (315) ayant ladite une extrémité en communication avec la chambre de réception de joint (314) et ladite autre extrémité en communication avec l'extérieur de la pompe haute pression de type à plongeur (100) ;
    un arbre à cames (40) étant disposé dans la cavité d'arbre à cames (202), et l'arbre à cames (40) étant capable d'entraîner l'ensemble haute pression (30) au moyen d'un appareil entraîné par came (50) pour assurer la pressurisation.
  4. Pompe haute pression de type à plongeur (100) selon la revendication 3, caractérisée en ce que la chambre de réception de joint (314) est en communication directe avec le canal de drainage d'huile (315).
  5. Pompe haute pression de type à plongeur (100) selon la revendication 3 ou 4, caractérisée en ce que l'autre extrémité du canal de drainage d'huile (315) est en communication avec l'extérieur de la pompe haute pression de type plongeur (100) par le biais d'une sortie d'huile (317).
  6. Ensemble haute pression (30), comprenant :
    un manchon de plongeur (31) selon la revendication 1 ou 2 ;
    un plongeur (32) qui est disposé dans la cavité de plongeur (311) du manchon de plongeur (31) et qui est capable d'aller et venir dans la cavité de plongeur (311) ; et
    un ensemble de soupape (33) disposé dans la cavité de soupape (312) du manchon de plongeur (31).
  7. Ensemble haute pression (30) selon la revendication 6, caractérisé en ce que la chambre de réception de joint (314) est en communication directe avec le canal de drainage d'huile (315).
  8. Ensemble haute pression (30) selon la revendication 6 ou 7, caractérisé en ce que l'autre extrémité du canal de drainage d'huile (315) est en communication avec l'extérieur de l'ensemble haute pression (30) par le biais d'une sortie d'huile (317).
EP17195118.9A 2016-10-10 2017-10-06 Pompe haute pression de type plongeur piston et ensemble à haute pression et son manchon de plongeur Active EP3306071B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201610884335.3A CN107917028B (zh) 2016-10-10 2016-10-10 柱塞式高压泵及其高压组件、柱塞套

Publications (2)

Publication Number Publication Date
EP3306071A1 EP3306071A1 (fr) 2018-04-11
EP3306071B1 true EP3306071B1 (fr) 2021-01-06

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP17195118.9A Active EP3306071B1 (fr) 2016-10-10 2017-10-06 Pompe haute pression de type plongeur piston et ensemble à haute pression et son manchon de plongeur

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EP (1) EP3306071B1 (fr)
CN (1) CN107917028B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2568542A (en) * 2017-11-21 2019-05-22 Delphi Tech Ip Ltd High pressure pump with plunger seal protection
CN108412652B (zh) * 2018-05-07 2024-01-16 梁跃中 一种柴油机多种燃料喷油泵结构
CN109653921A (zh) * 2018-10-30 2019-04-19 中国北方发动机研究所(天津) 一种防柱塞卡滞的喷油泵柱塞套

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014214291A1 (de) * 2014-07-22 2016-01-28 Robert Bosch Gmbh Kraftstoffhochdruckpumpe, insbesondere Steckpumpe

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DE10322598A1 (de) * 2003-05-20 2004-12-09 Robert Bosch Gmbh Kolbenpumpe, insbesondere Hochdruck-Kraftstoffpumpe
JP4414966B2 (ja) * 2006-01-16 2010-02-17 Ｎｏｋ株式会社 高圧燃料ポンプおよび高圧燃料ポンプ用シールシステム
US9151289B2 (en) * 2008-08-21 2015-10-06 Cummins Inc. Fuel pump
US8308450B2 (en) * 2009-03-05 2012-11-13 Cummins Intellectual Properties, Inc. High pressure fuel pump with parallel cooling fuel flow
CN201851241U (zh) * 2010-11-18 2011-06-01 博世汽车柴油系统股份有限公司 高压燃油泵
EP2620633A1 (fr) * 2012-01-30 2013-07-31 Delphi Technologies Holding S.à.r.l. Tête de pompe pour pompe à carburant
JP6293994B2 (ja) * 2012-10-31 2018-03-14 日立オートモティブシステムズ株式会社 高圧燃料供給ポンプ
DE102013215956A1 (de) * 2013-08-13 2015-02-19 Continental Automotive Gmbh Hochdruckpumpe
DE102015201444A1 (de) * 2015-01-28 2016-07-28 Robert Bosch Gmbh Hochdruckpumpe zur Förderung eines Mediums

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014214291A1 (de) * 2014-07-22 2016-01-28 Robert Bosch Gmbh Kraftstoffhochdruckpumpe, insbesondere Steckpumpe

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Publication number Publication date
CN107917028A (zh) 2018-04-17
CN107917028B (zh) 2022-01-18
EP3306071A1 (fr) 2018-04-11

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