EP1552162B1 - Hydrospeicher - Google Patents

Hydrospeicher Download PDF

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Publication number
EP1552162B1
EP1552162B1 EP03809250A EP03809250A EP1552162B1 EP 1552162 B1 EP1552162 B1 EP 1552162B1 EP 03809250 A EP03809250 A EP 03809250A EP 03809250 A EP03809250 A EP 03809250A EP 1552162 B1 EP1552162 B1 EP 1552162B1
Authority
EP
European Patent Office
Prior art keywords
piston
axial direction
guide
circumference
fluid side
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.)
Expired - Lifetime
Application number
EP03809250A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1552162A1 (de
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/de
Application granted granted Critical
Publication of EP1552162B1 publication Critical patent/EP1552162B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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 according to the feature configuration of the preamble of claim 1.
  • Piston accumulator of this type (DE 36 38 640 A) are commercially available and find widespread use in hydrosystems for versatile tasks application, for example, energy storage, emergency operation, oil leakage compensation, volume compensation, shock absorption, pulsation damping and the like.
  • a generic hydraulic accumulator is known, with a movable in the storage housing in the axial direction, a gas side of a fluid side of the storage housing separating piston, provided at the periphery for the interaction with the wall of the storage housing provided guide elements and at least one sealing element which is axially offset to the guide elements, is disposed in the peripheral portion of the piston between them, wherein between the guide member which is closest to the fluid side adjacent the piston side, and the axially next following, offset in the axial direction to the gas side sealing element a pressure equalization channel opens on the piston circumference, which forms a fluid path to the fluid side in the piston, and wherein in the pressure equalization passage, a device whose passage cross section is reduced in size is provided.
  • the invention is therefore based on the object to further improve the known solutions to the effect that results in an improved long-term performance for a hydraulic accumulator.
  • This object is achieved by a hydraulic accumulator with the features of claim 1 in its entirety.
  • the starting point of the solution according to the invention is that between the guide element which is closest to the piston side adjacent to the fluid side, and the next axially adjacent to the gas side offset sealing element, a pressure equalization channel opens on the piston circumference, which forms a fluid path to the fluid side in the piston, and that in the pressure equalization passage, a means whose passage cross-section reducing means is provided.
  • Dirt particles contained in the fluid side hydraulic oil can adversely affect the long-term performance of the hydraulic accumulator, more specifically, they can affect the performance of the sealing and guiding system between the piston circumference and the inner wall of the accumulator housing.
  • hydraulic accumulators of the prior art due to the movement of the piston, there is a pressure difference between the fluid side and the space located at the piston circumference between the guide element at the fluid-side end of the piston and the sealing element following in the axial direction. Due to this pressure difference occurs over the guide element away to a small volume flow in the space between the guide element and sealing element. Entrained dirt particles can thereby between Deposit the guide element and piston, and cause system-damaging scratches due to movement of the piston.
  • the Schmutzabstreiferlippe is provided with a taper angle ⁇ , which is about 10 ° relative to the axial direction of the piston and in that the radial thickness of the lip at its on the Rectangular ring adjacent root is slightly less than half the radial thickness of the rectangular ring, it is ensured that dirt particles, even if they may have already fixed to the housing inner wall, are not overflowed in piston movements but stripped off.
  • the reduction of the passage cross-section of the pressure compensation channel effecting device preferably reduces the passage cross-section so strong that results due to the cross-sectional constriction, the effect of a particulate filter. Even a minimal volume flow through the pressure equalization channel, as it results for the pressure equalization during movements, thereby does not lead to a transport of dirt particles in the space behind the guide element gap on the piston circumference.
  • a throttle device for example, a nozzle used in the pressure equalization channel with a correspondingly small nozzle opening, which acts as a particle filter.
  • a porous filter element inserted in the pressure equalization channel can be provided as the device narrowing the cross-section.
  • Fig. 1 of the described embodiment of the hydraulic accumulator according to the invention in the form of a piston accumulator only the portion of the storage case 1 is shown, in which the piston 3 is located. This forms in the axial direction, ie along the longitudinal axis 4, movable separating element between the gas side 5 and the fluid side 7 of the storage housing.
  • the gas side 5 is usually filled with nitrogen gas, while the fluid side 7 usually contains hydraulic oil during operation.
  • the effective between the circumference of the piston 3 and the inner wall of the storage enclosure 1 sealing and guiding system, which prevents media from one side of the piston to the other piston side and forms a piston guide during movements of the piston 3, has a plurality of provided on the circumference of the piston 3 components. In succession, in the axial direction from left to right in FIG.
  • a pressure equalization channel 19 which is formed of two mutually merging blind holes, one of which, starting from the end 13 of the piston 3, extends parallel to the longitudinal axis 4 and is denoted by 20, while the other bore, designated 21, extends at right angles thereto, starting from the circumference of the piston 3.
  • the bore 21 opens at the piston circumference in the intermediate space between the guide belt 17 and the piston seal 15 following in the axial direction. This room is labeled 23.
  • pressure equalization channel 19 avoids the formation of a corresponding pressure difference and thus a corresponding oil transfer.
  • 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 to be so small that it acts as a particle filter, so that no particles that have a larger dimension than the bore 27 can pass through the channel 19 into the space 23.
  • a correspondingly small-sized nozzle bore 27 as a particle filter could be used in the pressure equalization channel 19, preferably in the bore 20, a filter element.
  • the guide belt 17 is additionally designed as a scraper element whose structure in particular From Fig. 2 it can be seen.
  • this scraper element as a base, which exerts the function of the piston guide in cooperation with the inner wall of the housing 1, a rectangular ring 29 which is mounted in an incorporated in the circumference of the piston 3 annular groove 31.
  • the guide surface forming the outer annular surface 33 of the rectangular ring 29 is extended in the axial direction to form a wiper lip 35. This extends over an axial length which is slightly larger than half the axial length of the rectangular ring 29, see Fig. 2.
  • the lip 35 tapers, starting from its root on the rectangular ring 29th , to the end edge 37 out with a taper angle ⁇ , which is about 10 degrees to the axial direction in the example shown.
  • ⁇ the radial thickness of the lip 37 at its adjacent to the rectangular ring 29 root is slightly less than half of the radial thickness of the rectangular ring 29th
  • the guide band 17 forming guide and Abstreiferelement consist of the rectangular ring 29 and integrally formed with him wiper lip 35 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 cantilevered.
  • the lip 35 extends over an end-side peripheral portion 39 of the piston 3 which is slightly reduced in outside diameter and extends into the region of the fluid-side end 13. By formed in section 39 between the piston 3 and lip 35, this can resiliently conform to the inner wall of the housing 1, whereby the lip 35 reaches an optimal scraper effect.
  • the guide band 9 shown on the left as seen in the viewing direction on 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)
  • Fluid-Pressure Circuits (AREA)
  • Lubricants (AREA)
  • Valve Device For Special Equipments (AREA)
EP03809250A 2002-10-19 2003-08-01 Hydrospeicher Expired - Lifetime EP1552162B1 (de)

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 (de) 2002-10-19 2003-08-01 Hydrospeicher

Publications (2)

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

Family

ID=32087041

Family Applications (1)

Application Number Title Priority Date Filing Date
EP03809250A Expired - Lifetime EP1552162B1 (de) 2002-10-19 2003-08-01 Hydrospeicher

Country Status (6)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011009326A1 (de) 2011-01-18 2012-07-19 Hydac Technology Gmbh Hydrospeicher und Dichtelement, insbesondere für die Verwendung in einem Hydrospeicher

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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
WO2009126784A2 (en) 2008-04-09 2009-10-15 Sustainx, Inc. Systems and methods for energy storage and recovery using compressed gas
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
US8037678B2 (en) * 2009-09-11 2011-10-18 Sustainx, Inc. Energy storage and generation systems and methods using coupled cylinder assemblies
US8474255B2 (en) 2008-04-09 2013-07-02 Sustainx, Inc. Forming liquid sprays in compressed-gas energy storage systems for effective heat exchange
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
US8250863B2 (en) 2008-04-09 2012-08-28 Sustainx, Inc. Heat exchange with compressed gas in energy-storage systems
US8677744B2 (en) 2008-04-09 2014-03-25 SustaioX, Inc. Fluid circulation in energy storage and recovery systems
US8240140B2 (en) 2008-04-09 2012-08-14 Sustainx, Inc. High-efficiency energy-conversion based on fluid expansion and compression
US8479505B2 (en) 2008-04-09 2013-07-09 Sustainx, Inc. Systems and methods for reducing dead volume in compressed-gas energy storage systems
US8448433B2 (en) 2008-04-09 2013-05-28 Sustainx, Inc. Systems and methods for energy storage and recovery using gas 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
US7802426B2 (en) 2008-06-09 2010-09-28 Sustainx, Inc. System and method for rapid isothermal gas expansion and compression for energy storage
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
WO2010105155A2 (en) 2009-03-12 2010-09-16 Sustainx, Inc. Systems and methods for improving drivetrain efficiency for compressed gas energy storage
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 (en) 2009-11-03 2011-05-12 Sustainx, Inc. Systems and methods for compressed-gas energy storage using coupled cylinder assemblies
US8191362B2 (en) 2010-04-08 2012-06-05 Sustainx, Inc. Systems and methods for reducing dead volume in compressed-gas energy storage systems
US8171728B2 (en) 2010-04-08 2012-05-08 Sustainx, Inc. High-efficiency liquid heat exchange 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
EP2715075A2 (en) 2011-05-17 2014-04-09 Sustainx, Inc. Systems and methods for efficient two-phase heat transfer in compressed-air energy storage systems
US8656959B2 (en) * 2011-09-23 2014-02-25 GM Global Technology Operations LLC Hydraulic accumulator
US20130091836A1 (en) 2011-10-14 2013-04-18 Sustainx, Inc. Dead-volume management in compressed-gas energy storage and recovery systems
WO2015163325A1 (ja) * 2014-04-22 2015-10-29 住友ゴム工業株式会社 空気入りタイヤ、及び空気入りタイヤの製造方法
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
WO2022266373A1 (en) * 2021-06-16 2022-12-22 Performance Pulsation Control, Inc. Diaphragm radial compression ring (drcr tm) to enhance the sealing ability and service life of the diaphragms used in dampeners/accumulators/pulsation control equipment

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DE102011009326A1 (de) 2011-01-18 2012-07-19 Hydac Technology Gmbh Hydrospeicher und Dichtelement, insbesondere für die Verwendung in einem Hydrospeicher

Also Published As

Publication number Publication date
WO2004038230A1 (de) 2004-05-06
DE50306403D1 (de) 2007-03-15
JP2006503247A (ja) 2006-01-26
WO2004038231A1 (de) 2004-05-06
US20060130920A1 (en) 2006-06-22
US7322377B2 (en) 2008-01-29
DE10248823A1 (de) 2004-05-06
ATE352719T1 (de) 2007-02-15
EP1552162A1 (de) 2005-07-13

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