WO2014019748A1 - Bague d'étanchéité de dépression pour un élément de pompe d'un groupe hydraulique - Google Patents

Bague d'étanchéité de dépression pour un élément de pompe d'un groupe hydraulique Download PDF

Info

Publication number
WO2014019748A1
WO2014019748A1 PCT/EP2013/061688 EP2013061688W WO2014019748A1 WO 2014019748 A1 WO2014019748 A1 WO 2014019748A1 EP 2013061688 W EP2013061688 W EP 2013061688W WO 2014019748 A1 WO2014019748 A1 WO 2014019748A1
Authority
WO
WIPO (PCT)
Prior art keywords
low
sealing ring
pump
pressure sealing
pump housing
Prior art date
Application number
PCT/EP2013/061688
Other languages
German (de)
English (en)
Inventor
Rainer Braun
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Priority to EP13728160.6A priority Critical patent/EP2880311A1/fr
Priority to CN201380040482.7A priority patent/CN104508300B/zh
Priority to KR1020157002765A priority patent/KR102084929B1/ko
Publication of WO2014019748A1 publication Critical patent/WO2014019748A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60T—VEHICLE BRAKE CONTROL SYSTEMS OR PARTS THEREOF; BRAKE CONTROL SYSTEMS OR PARTS THEREOF, IN GENERAL; ARRANGEMENT OF BRAKING ELEMENTS ON VEHICLES IN GENERAL; PORTABLE DEVICES FOR PREVENTING UNWANTED MOVEMENT OF VEHICLES; VEHICLE MODIFICATIONS TO FACILITATE COOLING OF BRAKES
    • B60T8/00—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force
    • B60T8/32—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration
    • B60T8/34—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition
    • B60T8/40—Arrangements for adjusting wheel-braking force to meet varying vehicular or ground-surface conditions, e.g. limiting or varying distribution of braking force responsive to a speed condition, e.g. acceleration or deceleration having a fluid pressure regulator responsive to a speed condition comprising an additional fluid circuit including fluid pressurising means for modifying the pressure of the braking fluid, e.g. including wheel driven pumps for detecting a speed condition, or pumps which are controlled by means independent of the braking system
    • B60T8/4031—Pump units characterised by their construction or mounting
    • 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
    • F04B1/0408—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
    • F04B1/0421—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
    • F04B1/0448—Sealing means, e.g. for shafts or housings
    • 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
    • F04B53/02—Packing the free space between cylinders and 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
    • 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
    • F04B53/14—Pistons, piston-rods or piston-rod connections
    • F04B53/143—Sealing provided on the piston
    • 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
    • F04B53/164—Stoffing boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J15/00—Sealings
    • F16J15/16—Sealings between relatively-moving surfaces
    • F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
    • F16J15/3268—Mounting of sealing rings

Definitions

  • the invention relates to a low-pressure sealing ring for a pump element of a hydraulic unit of a vehicle brake system having a pump housing and a pump piston guided displaceably therein, wherein the low-pressure sealing ring is adapted for sealing against the pump housing and for sealing against the pump piston. Furthermore, the invention relates to the use of such a low-pressure sealing ring on a pump element of a hydraulic unit of a vehicle brake system. For hydraulic power units, such as those on vehicle brake systems for regulating
  • Brake pressure can be used during an anti-lock function
  • pump housing are provided, in which in particular at least two pistons are slidably mounted.
  • the two pistons are displaced axially back and forth by means of a single eccentric drive and it is sucked in this way in each case formed in front of the piston pressure chamber hydraulic fluid andwhogefödert out of this.
  • the pressure chamber is of its own
  • a cylinder which is also sealed on the piston side.
  • a cylinder and a piston thus form a pump element, which is inserted in the housing in a stepped bore and is often pressed from the outside.
  • the piston protrudes into the housing further into an area in which the eccentric drive is located at the end. In this area, which is referred to here as a low-pressure area, and the supply of hydraulic fluid into the cylinder is formed.
  • the case between the piston and the housing basically existing annular gap must be sealed by means of a low-pressure sealing ring.
  • the low-pressure sealing ring thus seals between the low-pressure region and an eccentric chamber belonging to the eccentric drive.
  • the low-pressure sealing rings used in this case are preferably made as O-rings or Q-rings mostly of EPDM (ethylene-propylene-diene rubber) and thus comparatively soft. They advantageously seal between the pump housing and the pump piston, but at the same time are at risk of tilting between the pump housing and the pump piston in the worst case. It can then lead to damage to the low-pressure sealing ring and leakage. Disclosure of the invention
  • a low-pressure sealing ring for a pump element of a hydraulic unit of a vehicle brake system which has a pump housing and a pump piston guided displaceably therein.
  • the low-pressure sealing ring is adapted for sealing against the pump housing and for sealing against the pump piston. He also has a gradation with which he can be positioned on a shoulder on the pump housing. This grading is directed in particular radially outward and then abuts against a radially inwardly directed shoulder of the pump housing.
  • the seal between the pump housing and the pump piston is improved, in particular, by the fact that the low-pressure sealing ring with its graduation is attached to a shoulder on the pump housing.
  • the staging initially results in a certain labyrinth effect, which makes it difficult to flow through brake fluid.
  • the low-pressure sealing ring positioned on the step can be pressed against the pump housing at least slightly in the axial direction and, if appropriate, at least slightly compressed axially. Due to the elasticity of its material, the axially compressed Niederdruckdicht- ring also urges in the radial direction against the adjacent components and thus in particular against the pump piston.
  • the low-pressure sealing ring according to the invention also assumes a tolerance compensation of length tolerances, that is to say in the axial direction on the pump element.
  • the installation of the low-pressure sealing ring is simplified because its position and position can be easily detected automatically based on the gradation.
  • the grading is preferably formed at right angles in the cross section of the low pressure sealing ring. Such gradation is inexpensive to produce both sides of the pump housing and the low-pressure sealing ring. It has a strong labyrinth effect and enables a safe installation of the low-pressure sealing ring.
  • a first sealing surface viewed in the cross-section of the low-pressure sealing ring, is advantageously formed, sealing off towards the pump housing.
  • the thus configured first sealing surface positions the low-pressure sealing ring relative to the pump housing in the radial direction. It also ensures a further sealing between pump housing and pump piston.
  • a first sealing bead for sealing to the pump housing is preferably provided for improved sealing of the low-pressure sealing ring.
  • a straight, second sealing surface sealing towards the pump piston is advantageously formed in the cross-section of the low-pressure sealing ring.
  • the pump piston slides along, wherein the sealing surface particularly advantageously contributes to a uniform lubricating film between the low-pressure sealing ring and the pump piston.
  • a second sealing bead for additional sealing to the pump piston is then also provided on the low-pressure sealing ring according to the invention.
  • the low-pressure sealing ring is further preferably formed with a front-side, to a neighboring component, in particular a filter, towards sealing, third sealing surface.
  • the third sealing surface serves as a contact surface for an adjacent component, with which the low-pressure sealing ring is urged in axial ring against the pump housing and thereby both clearly positioned and sealingly can be applied to the pump housing.
  • the invention is accordingly also applicable to a use of such a low-pressure sealing ring according to the invention on a pump element of a hydraulic pump. likaggregats a vehicle brake system directed.
  • the pump element comprises a pump housing, a pump piston guided slidably therein, and a filter for filtering brake fluid flowing into the pump element.
  • the low-pressure sealing ring is positioned with its gradation on a shoulder of the pump housing and urged by means of another component of the pump element against the pump housing.
  • a tolerance compensation with regard to the length of the pump element is created very advantageously.
  • the sealing of the low-pressure sealing ring is improved against the pump housing due to the contact pressure on the gradation against the pump housing.
  • an improved sealing of the low-pressure sealing ring is provided against the pump piston by the low-pressure sealing ring undergoes an axial compression. This results in a radial pressure of the low pressure sealing ring, both outside against the pump housing and inside against the pump piston. This pressure can be set exactly to the desired size with the pressure applied axially to the low-pressure sealing ring.
  • FIG. 1 shows a longitudinal section of an embodiment of a pump element with a low pressure sealing ring according to the prior art
  • Fig. 2 is a longitudinal section of an embodiment of a pump element with a low-pressure sealing ring according to the invention
  • FIG. 3 is an enlarged longitudinal section of the low-pressure sealing ring according to FIG.
  • a pump element 10 of a hydraulic unit is illustrated, which is arranged in a block-shaped pump housing 12.
  • the hydraulic unit allows vehicle brakes of an associated vehicle brake system in particular anti-lock, anti-skid and a vehicle dynamics control function (ABS, ASR and ESP).
  • ABS anti-lock, anti-skid
  • ESP vehicle dynamics control function
  • a stepped bore 14 is formed, in which the pump element 10 is arranged.
  • the stepped bore 14 has three paragraphs 16, 18 and 20, with which the diameter 14 from the outside starting in steps increasingly inwardly reduced.
  • the pump element 10 has a multi-part pump cylinder 22, which surrounds a likewise multi-part pump piston 24.
  • the multi-part pump cylinder 22 includes an annular filter 26 to which brake fluid can be supplied through an inlet 28 from radially outside to radially inside through the pump housing 12.
  • To the filter 26 is directed to axially outwardly directed to a cylinder cup 30, with which a pressure chamber 32 is enclosed.
  • On the outside there is then a cylinder cover 34 which is fluid-caulked with the pump housing 12 and with which the filter 26 and the cylinder cup 30 and thus the entire pump element 10 are retained in the stepped bore 14.
  • an outlet valve 36 In the cylinder cover 34 is an outlet valve 36, with the brake fluid under pressure from the pressure chamber 32 controlled in an exhaust 38 can be removed.
  • the multi-part pump piston 24 is designed with a circular cylindrical piston plunger 40, which is located in the axially innermost region of the bore 14.
  • Piston plunger 40 can be moved out of the bore 14 on an end face 42 by an eccentric 44 in the axial direction.
  • a piston sleeve 48 At the other end face 46 of the piston plunger 40 adjoins a piston sleeve 48, through which the flowed through the inlet 28 and the filter 26 brake fluid can continue to flow radially inward.
  • a piston sealing disc 50 then axially adjoins the piston sleeve 48, wherein an inlet valve 52 for supplying the supplied brake fluid into the pressure chamber 32 is located between the piston sleeve 48 and the piston sealing disc 50.
  • the piston plunger 40 is guided as part of the pump piston 24 in the rear part of the stepped bore 14 by means of a guide ring 54, a support ring 56 and a low-pressure sealing ring 58.
  • the conventional low-pressure sealing ring 58 is arranged between the filter 26 and the support ring 56 in a purely cylindrical portion 64 of the stepped bore 14 as shown in FIG.
  • the pump element 10 in the stepped bore 14 of the filter 26 is located with its inner front end on the second paragraph 18 and is supported against this.
  • a low-pressure sealing ring 58 is illustrated according to the invention, the directed radially outward or radially outward has a right-angled step 66, with which he is on the shoulder 18 on the pump housing 12 is posi tioned.
  • the thus supported on the pump housing 12 gradation 66 of the low pressure sealing ring 58 improves the seal between the pump housing 12 and the pump piston 24 at the low pressure region 60, on the one hand a certain labyrinth effect with the gradation and on the other hand, the low pressure sealing ring 58 due to the pressure applied to it in Radial direction is pressed both the outside of the pump housing 12 and the inside of the pump piston 24.
  • the thus configured and held low-pressure sealing ring 58 fulfills its novel sealing function particularly advantageously in that it then has a first sealing surface 68, which is viewed in the cross-section of the low-pressure sealing ring 58 and seals the pump housing 12 toward the eccentric region 62.
  • the sealing surface 68 also terminates with a first sealing bead 70 for sealing against the pump housing 12.
  • Radial on the inside, the low-pressure sealing ring 58 furthermore has, viewed in cross-section, a straight, second sealing surface 72 which seals off towards the pump piston 24 and terminates toward the eccentric chamber 62 with a second sealing bead 74.
  • the low pressure sealing ring 58 is formed with a third sealing surface 76.
  • This third sealing surface 76 serves as a contact surface for the adjacent filter 26, with which the low-pressure sealing ring 58 is urged against the pump housing 12 in axial ringing.
  • the low-pressure sealing ring 58 is in particular both clearly positioned and urged in a sealing manner against the pump housing 12 and the pump piston 24.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Transportation (AREA)
  • Valves And Accessory Devices For Braking Systems (AREA)
  • Details Of Reciprocating Pumps (AREA)

Abstract

L'invention concerne une bague d'étanchéité de dépression (58) pour un élément de pompe (10) d'un groupe hydraulique d'une installation de freinage de véhicule qui présente un corps de pompe (12) et un piston de pompe (24) guidé de façon coulissante dans ce corps. Cette bague est apte à former un joint étanche sur le corps de pompe (12) ainsi qu'à former un joint étanche sur le piston de pompe (24) et, par ailleurs, elle présente un épaulement (66) avec lequel elle peut être positionnée contre un décrochement (18) du corps de pompe (12).
PCT/EP2013/061688 2012-08-03 2013-06-06 Bague d'étanchéité de dépression pour un élément de pompe d'un groupe hydraulique WO2014019748A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP13728160.6A EP2880311A1 (fr) 2012-08-03 2013-06-06 Bague d'étanchéité de dépression pour un élément de pompe d'un groupe hydraulique
CN201380040482.7A CN104508300B (zh) 2012-08-03 2013-06-06 用于液压设备的泵单元的低压密封圈
KR1020157002765A KR102084929B1 (ko) 2012-08-03 2013-06-06 유압 유닛의 펌프 부재용 저압 밀봉 링

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012213763.7A DE102012213763A1 (de) 2012-08-03 2012-08-03 Niederdruckdichtring für ein Pumpenelement eines Hydraulikaggregats
DE102012213763.7 2012-08-03

Publications (1)

Publication Number Publication Date
WO2014019748A1 true WO2014019748A1 (fr) 2014-02-06

Family

ID=48607242

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2013/061688 WO2014019748A1 (fr) 2012-08-03 2013-06-06 Bague d'étanchéité de dépression pour un élément de pompe d'un groupe hydraulique

Country Status (5)

Country Link
EP (1) EP2880311A1 (fr)
KR (1) KR102084929B1 (fr)
CN (1) CN104508300B (fr)
DE (1) DE102012213763A1 (fr)
WO (1) WO2014019748A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015091700A1 (fr) * 2013-12-20 2015-06-25 Robert Bosch Gmbh Unité hydraulique

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102390510B1 (ko) * 2017-07-31 2022-04-26 현대모비스 주식회사 전자제어식 브레이크 시스템용 펌프장치
CN114094381B (zh) * 2021-10-28 2024-04-16 中航光电科技股份有限公司 一种密封连接器

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19704250A1 (de) * 1997-02-05 1998-08-06 Itt Mfg Enterprises Inc Dichtung mit konischem Boden der Aufnahmenut
DE102005042197A1 (de) * 2005-09-06 2007-03-08 Robert Bosch Gmbh Kolbenpumpe mit verbessertem Kolben
DE102005045937A1 (de) * 2005-09-26 2007-03-29 Robert Bosch Gmbh Kolbenpumpe für eine Schlupfregelung aufweisende Fahrzeugbremsanlage
DE102006035055A1 (de) * 2006-07-28 2008-01-31 Robert Bosch Gmbh Dicht- und Führungseinrichtung für einen Kolben einer Kolbenpumpe
WO2010000534A1 (fr) * 2008-07-03 2010-01-07 Robert Bosch Gmbh Pompe à piston
DE102011015709A1 (de) * 2010-03-31 2012-02-02 Nissin Kogyo Co., Ltd. Kolbenpumpe

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102009047590B4 (de) * 2009-12-07 2022-05-19 Robert Bosch Gmbh Kolbenpumpe mit einer Dichtungsanordnung
DE102010040135A1 (de) * 2010-09-02 2012-03-08 Robert Bosch Gmbh Kolbenführungselement, insbesondere einer hydraulischen Kolbenpumpe

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19704250A1 (de) * 1997-02-05 1998-08-06 Itt Mfg Enterprises Inc Dichtung mit konischem Boden der Aufnahmenut
DE102005042197A1 (de) * 2005-09-06 2007-03-08 Robert Bosch Gmbh Kolbenpumpe mit verbessertem Kolben
DE102005045937A1 (de) * 2005-09-26 2007-03-29 Robert Bosch Gmbh Kolbenpumpe für eine Schlupfregelung aufweisende Fahrzeugbremsanlage
DE102006035055A1 (de) * 2006-07-28 2008-01-31 Robert Bosch Gmbh Dicht- und Führungseinrichtung für einen Kolben einer Kolbenpumpe
WO2010000534A1 (fr) * 2008-07-03 2010-01-07 Robert Bosch Gmbh Pompe à piston
DE102011015709A1 (de) * 2010-03-31 2012-02-02 Nissin Kogyo Co., Ltd. Kolbenpumpe

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2015091700A1 (fr) * 2013-12-20 2015-06-25 Robert Bosch Gmbh Unité hydraulique

Also Published As

Publication number Publication date
CN104508300A (zh) 2015-04-08
KR102084929B1 (ko) 2020-03-05
KR20150040896A (ko) 2015-04-15
CN104508300B (zh) 2016-10-26
DE102012213763A1 (de) 2014-02-06
EP2880311A1 (fr) 2015-06-10

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