EP1552162A1 - Accumulateur hydraulique - Google Patents

Accumulateur hydraulique

Info

Publication number
EP1552162A1
EP1552162A1 EP03809250A EP03809250A EP1552162A1 EP 1552162 A1 EP1552162 A1 EP 1552162A1 EP 03809250 A EP03809250 A EP 03809250A EP 03809250 A EP03809250 A EP 03809250A EP 1552162 A1 EP1552162 A1 EP 1552162A1
Authority
EP
European Patent Office
Prior art keywords
piston
hydraulic accumulator
fluid
section
accumulator according
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.)
Granted
Application number
EP03809250A
Other languages
German (de)
English (en)
Other versions
EP1552162B1 (fr
Inventor
Herbert Baltes
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.)
Hydac Technology GmbH
Original Assignee
Hydac Technology 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 Hydac Technology GmbH filed Critical Hydac Technology GmbH
Publication of EP1552162A1 publication Critical patent/EP1552162A1/fr
Application granted granted Critical
Publication of EP1552162B1 publication Critical patent/EP1552162B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • F15B1/04—Accumulators
    • F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
    • F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/205—Accumulator cushioning means using gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
    • F15B2201/312—Sealings therefor, e.g. piston rings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2201/00—Accumulators
    • F15B2201/30—Accumulator separating means
    • F15B2201/315—Accumulator separating means having flexible separating means
    • F15B2201/3158—Guides for the flexible separating means, e.g. for a collapsed bladder

Definitions

  • the invention relates to a hydraulic accumulator with a piston which is movable in the axial direction in the accumulator housing and separates a gas side from a fluid side of the accumulator housing, on the circumference of which guide elements are provided for interaction with the wall of the accumulator housing and at least one sealing element which is in the axial direction towards the Guide elements offset, is arranged in the peripheral portion of the piston located between them.
  • Piston accumulators of this type are commercially available and are widely used in hydraulic systems for a variety of tasks, for example for energy storage, emergency actuation, leakage oil compensation, volume compensation, shock absorption, pulsation damping and the like.
  • the invention has for its object to provide a hydraulic accumulator of the type under consideration, which is distinguished from the prior art by an improved long-term operating behavior.
  • this object is achieved according to the invention in that between the guide element which is closest to the piston side adjoining the fluid side and the sealing element which follows in the axial direction and is offset in the axial direction to the gas side, a pressure compensation channel opens at the piston circumference, which Piston forms a fluid path to the fluid side, and that a device reducing its passage cross section is provided in the pressure compensation channel.
  • the starting point of the invention is that it has been found that dirt particles which are contained in the hydraulic oil located on the fluid side can have a negative effect on the long-term behavior of the hydraulic accumulator, more precisely the operational behavior of the sealing and guiding system between the piston circumference and the inner wall of the accumulator housing ,
  • hydraulic accumulators of the prior art there is a pressure difference between the fluid side and the space located on the piston periphery between the guide element at the fluid-side end of the piston and the next sealing element in the axial direction due to the movement of the piston. Due to this pressure difference, there is a small volume flow across the guide element into the space between the guide element and the sealing element.
  • the device effecting the reduction of the passage cross section of the pressure compensation channel preferably reduces the passage cross section so much that the effect of a particle filter results due to the narrowing of the cross section. Even a minimal volume flow through the pressure equalization channel, as it results for the pressure equalization during movements, does not result in the transport of dirt particles into the space on the piston circumference behind the guide element.
  • a throttle device can be provided as the device reducing the passage cross section, for example a nozzle inserted into the pressure equalization channel with a correspondingly small nozzle opening, which acts as a particle filter.
  • a porous filter element inserted into the pressure compensation channel can be provided as the device that narrows the cross section.
  • the guide element closest to the fluid side of the piston is arranged closely adjacent to the fluid-side end of the piston and is guided by a guide band with an at least approximately formed dirt wiper lip extending to the end of the piston. This additionally prevents dirt particles, which may have already become lodged on the inner wall of the housing, from being overrun during piston movements.
  • the guide band having the dirt wiper lip is designed as a rectangular ring seated in an annular groove of the piston circumference with a wiper lip extending radially on the outside on one side thereof and tapering towards its end edge.
  • FIG. 1 shows a broken longitudinal section of a piston accumulator according to an exemplary embodiment of the invention, only the section of the accumulator housing in which the piston is located being shown, and FIG. 2 shows a part drawn on a greatly enlarged scale compared to FIG. 1 Longitudinal section of a piston guide element of the embodiment of FIG. 1 in the form of a rectangular ring with a protruding dirt wiper lip.
  • FIG. 1 of the exemplary embodiment of the hydraulic accumulator to be described in the form of a piston accumulator, only the section of the accumulator housing 1 in which the piston 3 is located is shown.
  • the gas side 5 is usually filled with nitrogen gas, while the fluid side 7 usually contains hydraulic oil during operation.
  • the effective sealing and guiding system between the circumference of the piston 3 and the inner wall of the storage housing 1, which prevents media transfer from one piston side to the other piston side and forms a piston guide when the piston 3 moves, has several components provided on the circumference of the piston 3 on.
  • a guide element in the form of a guide band 9 adjacent to the fluid-side end of the piston 3, a first piston seal 1 located at an axial distance therefrom approximately in the central region of the piston 3 1, a second piston seal 15 offset in relation to this in the axial direction against the fluid-side end 13 of the piston 3 and a guide element in the form of a guide band 17 which is offset even further against the end 13 of the piston 3.
  • the bore 21 opens out on the circumference of the piston in the space between the guide band 17 and the piston seal 15 following in the axial direction. This room is designated 23.
  • the invention provides for a narrowing of the passage cross section of the channel 19.
  • this device is formed by a nozzle 25 which is inserted into the mouth of the bore 20 of the channel 19 at the end 13 of the piston 3.
  • the nozzle bore 27 is chosen so small that it acts as a particle filter, so that no particles that have a larger dimension than the bore 27 can get into the space 23 via the channel 19.
  • a filter element could be inserted into the pressure compensation channel 19, preferably in its bore 20.
  • the guiding band 17 is additionally designed as a wiper element, the construction of which re can be seen from Fig. 2.
  • this scraper element as the base part, which performs the function of the piston guide in cooperation with the inner wall of the housing 1, has a rectangular ring 29 which is mounted in an annular groove 31 machined into the circumference of the piston 3.
  • the outer ring surface 33 of the rectangular ring 29 forming the guide surface is extended in the axial direction to form a wiper lip 35. This extends over an axial length that is somewhat greater than half the axial length of the rectangular ring 29, see FIG. 2.
  • FIG. 2 As can also be clearly seen from FIG.
  • the lip 35 tapers, starting from its root on the rectangular ring 29 , up to the end edge 37 with a taper angle ⁇ , which in the example shown is about 10 degrees with respect to the axial direction.
  • ⁇ which in the example shown is about 10 degrees with respect to the axial direction.
  • the radial thickness of the lip 37 at its root adjoining the rectangular ring 29 is somewhat less than half the radial thickness of the rectangular ring 29.
  • the rectangular ring 29 and the scraper lip 35 formed integrally with it are made of an elastomeric material, so that the rectangular ring 29 can be snapped into the annular groove 31 on the piston 3 and the lip 35 extends flexibly and projecting , As can be seen from FIG. 1, the lip 35 extends over an end-side circumferential section 39 of the piston 3 which is somewhat reduced in outer diameter and extends into the region of the fluid-side end 13. Due to the space formed in section 39 between the piston 3 and the lip 35, the latter can resiliently nestle against the inner wall of the housing 1, as a result of which the lip 35 achieves an optimal scraper effect.
  • the guide band 9 shown on the left in the direction of view of FIG. 1 can be configured or replaced by the guide band 17 shown on the right.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Lubricants (AREA)
  • Valve Device For Special Equipments (AREA)
  • Fluid-Pressure Circuits (AREA)
EP03809250A 2002-10-19 2003-08-01 Accumulateur hydraulique Expired - Lifetime EP1552162B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10248823A DE10248823A1 (de) 2002-10-19 2002-10-19 Hydrospeicher
DE10248823 2002-10-19
PCT/EP2003/008517 WO2004038230A1 (fr) 2002-10-19 2003-08-01 Accumulateur hydraulique

Publications (2)

Publication Number Publication Date
EP1552162A1 true EP1552162A1 (fr) 2005-07-13
EP1552162B1 EP1552162B1 (fr) 2007-01-24

Family

ID=32087041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03809250A Expired - Lifetime EP1552162B1 (fr) 2002-10-19 2003-08-01 Accumulateur hydraulique

Country Status (6)

Country Link
US (1) US7322377B2 (fr)
EP (1) EP1552162B1 (fr)
JP (1) JP2006503247A (fr)
AT (1) ATE352719T1 (fr)
DE (2) DE10248823A1 (fr)
WO (2) WO2004038230A1 (fr)

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CN100376807C (zh) * 2006-07-12 2008-03-26 三一重工股份有限公司 活塞式蓄能器
US8020587B2 (en) * 2007-06-11 2011-09-20 The United States Of America As Represented By The Administrator Of The U.S. Environmental Protection Agency Piston-in sleeve hydraulic pressure accumulator
US7802426B2 (en) 2008-06-09 2010-09-28 Sustainx, Inc. System and method for rapid isothermal gas expansion and compression for energy storage
US8359856B2 (en) * 2008-04-09 2013-01-29 Sustainx Inc. Systems and methods for efficient pumping of high-pressure fluids for energy storage and recovery
US8677744B2 (en) 2008-04-09 2014-03-25 SustaioX, Inc. Fluid circulation in energy storage and recovery systems
US20100307156A1 (en) * 2009-06-04 2010-12-09 Bollinger Benjamin R Systems and Methods for Improving Drivetrain Efficiency for Compressed Gas Energy Storage and Recovery Systems
US8448433B2 (en) 2008-04-09 2013-05-28 Sustainx, Inc. Systems and methods for energy storage and recovery using gas expansion and compression
US8474255B2 (en) 2008-04-09 2013-07-02 Sustainx, Inc. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange
US8479505B2 (en) 2008-04-09 2013-07-09 Sustainx, Inc. Systems and methods for reducing dead volume in compressed-gas energy storage systems
US8037678B2 (en) 2009-09-11 2011-10-18 Sustainx, Inc. Energy storage and generation systems and methods using coupled cylinder assemblies
EP2280841A2 (fr) 2008-04-09 2011-02-09 Sustainx, Inc. Systèmes et procédés de stockage et de récupération d'énergie à l aide de gaz comprimé
US8225606B2 (en) 2008-04-09 2012-07-24 Sustainx, Inc. Systems and methods for energy storage and recovery using rapid isothermal gas expansion and compression
US8250863B2 (en) 2008-04-09 2012-08-28 Sustainx, Inc. Heat exchange with compressed gas in energy-storage systems
US8240140B2 (en) 2008-04-09 2012-08-14 Sustainx, Inc. High-efficiency energy-conversion based on fluid expansion and compression
US7958731B2 (en) * 2009-01-20 2011-06-14 Sustainx, Inc. Systems and methods for combined thermal and compressed gas energy conversion systems
WO2010105155A2 (fr) 2009-03-12 2010-09-16 Sustainx, Inc. Systèmes et procédés destinés à améliorer le rendement de transmission pour le stockage d'énergie sous forme de gaz comprimé
US8910807B2 (en) * 2009-05-20 2014-12-16 Manitowoc Crane Companies, Llc Compressible stop member for use on a crane
US8104274B2 (en) 2009-06-04 2012-01-31 Sustainx, Inc. Increased power in compressed-gas energy storage and recovery
US8267123B2 (en) * 2009-06-29 2012-09-18 Emerson Process Management, Valve Automation Inc. Methods and apparatus to charge accumulator apparatus
WO2011056855A1 (fr) 2009-11-03 2011-05-12 Sustainx, Inc. Systèmes et procédés de stockage d'énergie produite par un gaz comprimé au moyen d'ensembles vérins couplés
US8171728B2 (en) 2010-04-08 2012-05-08 Sustainx, Inc. High-efficiency liquid heat exchange in compressed-gas energy storage systems
US8191362B2 (en) 2010-04-08 2012-06-05 Sustainx, Inc. Systems and methods for reducing dead volume in compressed-gas energy storage systems
US8234863B2 (en) 2010-05-14 2012-08-07 Sustainx, Inc. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange
US8495872B2 (en) 2010-08-20 2013-07-30 Sustainx, Inc. Energy storage and recovery utilizing low-pressure thermal conditioning for heat exchange with high-pressure gas
US20120047884A1 (en) * 2010-08-30 2012-03-01 Mcbride Troy O High-efficiency energy-conversion based on fluid expansion and compression
US8578708B2 (en) 2010-11-30 2013-11-12 Sustainx, Inc. Fluid-flow control in energy storage and recovery systems
DE102011009326A1 (de) 2011-01-18 2012-07-19 Hydac Technology Gmbh Hydrospeicher und Dichtelement, insbesondere für die Verwendung in einem Hydrospeicher
WO2012158781A2 (fr) 2011-05-17 2012-11-22 Sustainx, Inc. Systèmes et procédés pour un transfert thermique biphasé efficace dans des systèmes de stockage d'énergie à air comprimé
US8656959B2 (en) * 2011-09-23 2014-02-25 GM Global Technology Operations LLC Hydraulic accumulator
US20130091835A1 (en) 2011-10-14 2013-04-18 Sustainx, Inc. Dead-volume management in compressed-gas energy storage and recovery systems
EP3135465B1 (fr) * 2014-04-22 2021-12-15 Sumitomo Rubber Industries, Ltd. Pneumatique et procédé de production de pneumatique
US10591101B2 (en) * 2016-01-23 2020-03-17 Ronald E. Smith Pulsation dampening system for high-pressure fluid lines
DE102019007711A1 (de) * 2019-11-07 2021-05-12 Hydac Technology Gmbh Kolbenspeicher
US20220063074A1 (en) * 2020-08-26 2022-03-03 Robert Bosch Gmbh Gas Spring for a Fastener Driving Tool
EP4356037A4 (fr) * 2021-06-16 2025-04-02 Performance Pulsation Control, Inc. Bague de compression radiale à diaphragme (drcr) permettant d'améliorer la capacité d'étanchéité et la durée de vie des diaphragmes utilisés dans des amortisseurs/des accumulateurs/un équipement de commande de pulsations

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Also Published As

Publication number Publication date
DE50306403D1 (de) 2007-03-15
DE10248823A1 (de) 2004-05-06
WO2004038231A1 (fr) 2004-05-06
ATE352719T1 (de) 2007-02-15
WO2004038230A1 (fr) 2004-05-06
US20060130920A1 (en) 2006-06-22
US7322377B2 (en) 2008-01-29
EP1552162B1 (fr) 2007-01-24
JP2006503247A (ja) 2006-01-26

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