EP0902193A3 - Piston accumulator with sealing device comprising deep-bed filter - Google Patents

Piston accumulator with sealing device comprising deep-bed filter Download PDF

Info

Publication number
EP0902193A3
EP0902193A3 EP98113168A EP98113168A EP0902193A3 EP 0902193 A3 EP0902193 A3 EP 0902193A3 EP 98113168 A EP98113168 A EP 98113168A EP 98113168 A EP98113168 A EP 98113168A EP 0902193 A3 EP0902193 A3 EP 0902193A3
Authority
EP
European Patent Office
Prior art keywords
piston
sealing rings
deep
hydraulic
sealing device
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
EP98113168A
Other languages
German (de)
French (fr)
Other versions
EP0902193A2 (en
EP0902193B1 (en
Inventor
Helmfried Kany
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 EP0902193A2 publication Critical patent/EP0902193A2/en
Publication of EP0902193A3 publication Critical patent/EP0902193A3/en
Application granted granted Critical
Publication of EP0902193B1 publication Critical patent/EP0902193B1/en
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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/04—Special measures taken in connection with the properties of the fluid
    • F15B21/041—Removal or measurement of solid or liquid contamination, e.g. filtering
    • 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
    • F15B2201/20—Accumulator cushioning means
    • F15B2201/21—Accumulator cushioning means using springs
    • 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
    • F15B2201/32—Accumulator separating means having multiple separating means, e.g. with an auxiliary piston sliding within a main piston, multiple membranes or combinations thereof
    • 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
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/41—Liquid ports
    • 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
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/41—Liquid ports
    • F15B2201/411—Liquid ports having valve means
    • 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
    • F15B2201/40—Constructional details of accumulators not otherwise provided for
    • F15B2201/415—Gas ports

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Sealing Devices (AREA)
  • Fluid-Pressure Circuits (AREA)

Abstract

A piston for separating the hydraulic side (14) of a pressure storage reservoir from a gas side (16) has piston sealing rings (18,20) of elastomer or of any other suitable sealing material. To protect the sealing rings from damage by debris in the hydraulic fluid a special felt ring (24) is fitted around the piston as the first ring seal to the hydraulic side. The felt collects any debris in the hydraulic fluid and ensures that only filtered fluid reaches the elastomer sealing rings. The main piston can be supplemented by a secondary piston on the gas side of the main piston, and connected to the main piston by a sprung coupling. The space between the two pistons is filled with clean hydraulic fluid.
EP98113168A 1997-09-12 1998-07-15 Piston accumulator with sealing device comprising deep-bed filter Expired - Lifetime EP0902193B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19740150A DE19740150A1 (en) 1997-09-12 1997-09-12 Piston accumulator with depth filtration seal
DE19740150 1997-09-12

Publications (3)

Publication Number Publication Date
EP0902193A2 EP0902193A2 (en) 1999-03-17
EP0902193A3 true EP0902193A3 (en) 1999-07-07
EP0902193B1 EP0902193B1 (en) 2003-10-29

Family

ID=7842159

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98113168A Expired - Lifetime EP0902193B1 (en) 1997-09-12 1998-07-15 Piston accumulator with sealing device comprising deep-bed filter

Country Status (6)

Country Link
EP (1) EP0902193B1 (en)
AT (1) ATE253177T1 (en)
DE (2) DE19740150A1 (en)
DK (1) DK0902193T3 (en)
ES (1) ES2210626T3 (en)
NO (1) NO320760B1 (en)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10052665B4 (en) * 2000-10-24 2007-02-01 Zf Sachs Ag Piston accumulator for a pressure medium actuator
DE10111332B4 (en) * 2001-03-08 2004-08-19 Carl Freudenberg Kg piston accumulators
DE10209663C1 (en) * 2002-03-05 2003-07-31 Hydac Technology Gmbh Pressure reservoir for fluid actuator has separator with filter and auxiliary piston to pressurize seal fluid around main piston
DE10242104A1 (en) * 2002-03-06 2003-09-18 Continental Teves Ag & Co Ohg Piston accumulator for electrohydraulic brake system of motor vehicle, has annular space filled with liquid and located between piston wall and accumulator housing, also has sensor for monitoring liquid volume inside liquid container
CN103511402A (en) * 2012-06-18 2014-01-15 中国航空工业集团公司西安飞机设计研究所 Method for preventing hydraulic lock and special pressure balance device for preventing hydraulic lock

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2019407A1 (en) * 1970-04-22 1971-11-04 Baumgarten Hydrotech Separating piston for hydropneumatic energy storage
CH591020A5 (en) * 1975-08-15 1977-08-31 Gfeller Hans High pressure storage reservoir - has separator of two longitudinally displaceable pistons
DE3638640A1 (en) * 1985-11-25 1987-06-19 Stroemholmens Mekaniska Verkst Device on a piston movable in a cylinder
DE3619990A1 (en) * 1986-06-13 1987-12-17 Bosch Gmbh Robert Piston pressure accumulator
EP0313539A1 (en) * 1987-10-23 1989-04-26 Volvo Flygmotor Ab A device for neutralizing metal chips in a pressure liquid accumulator

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4141929A1 (en) * 1991-12-19 1993-06-24 Bosch Gmbh Robert Piston-type accumulator - has connecting channel, which is partly helical, between piston chamber and atmosphere

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2019407A1 (en) * 1970-04-22 1971-11-04 Baumgarten Hydrotech Separating piston for hydropneumatic energy storage
CH591020A5 (en) * 1975-08-15 1977-08-31 Gfeller Hans High pressure storage reservoir - has separator of two longitudinally displaceable pistons
DE3638640A1 (en) * 1985-11-25 1987-06-19 Stroemholmens Mekaniska Verkst Device on a piston movable in a cylinder
DE3619990A1 (en) * 1986-06-13 1987-12-17 Bosch Gmbh Robert Piston pressure accumulator
EP0313539A1 (en) * 1987-10-23 1989-04-26 Volvo Flygmotor Ab A device for neutralizing metal chips in a pressure liquid accumulator

Also Published As

Publication number Publication date
NO984186L (en) 1999-03-15
DE59810011D1 (en) 2003-12-04
EP0902193A2 (en) 1999-03-17
DE19740150A1 (en) 1999-03-25
ES2210626T3 (en) 2004-07-01
EP0902193B1 (en) 2003-10-29
NO984186D0 (en) 1998-09-11
DK0902193T3 (en) 2004-02-23
NO320760B1 (en) 2006-01-23
ATE253177T1 (en) 2003-11-15

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