EP0902193A2 - Accumulateur à piston avec dispositif d'étanchéité ayant un filtre à lit profond - Google Patents

Accumulateur à piston avec dispositif d'étanchéité ayant un filtre à lit profond Download PDF

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Publication number
EP0902193A2
EP0902193A2 EP98113168A EP98113168A EP0902193A2 EP 0902193 A2 EP0902193 A2 EP 0902193A2 EP 98113168 A EP98113168 A EP 98113168A EP 98113168 A EP98113168 A EP 98113168A EP 0902193 A2 EP0902193 A2 EP 0902193A2
Authority
EP
European Patent Office
Prior art keywords
piston
separating
sealing device
accumulator
sealing
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)
English (en)
Other versions
EP0902193B1 (fr
EP0902193A3 (fr
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/fr
Publication of EP0902193A3 publication Critical patent/EP0902193A3/fr
Application granted granted Critical
Publication of EP0902193B1 publication Critical patent/EP0902193B1/fr
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
    • 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

Definitions

  • the invention relates to a piston accumulator with an inside Storage housing longitudinally movable separating piston, which is a fluid side of the Seals storage from its gas side via a sealing device.
  • piston accumulators DE 41 41 929 A1 Types known.
  • the essential components of a piston accumulator are the outer cylinder tube forming the accumulator housing, which is why the piston accumulator are also designated with cylinder memory, the separating piston with the Sealing system in the form of sealing rings attached to its outer circumference as well as the front cover, which also the Include liquid or gas connection.
  • the storage case come doing essentially two tasks; on the one hand, it is used for recording of the internal pressure and on the other hand it causes the separation piston to be guided, which represents the separating element between the gas and fluid side.
  • the object of the invention to create a piston accumulator that works even under extreme conditions with long operating times and when contamination occurs in the operating medium maintains its tightness and ensures that in no operating condition Gas can escape to the fluid side. This is a task solves a piston accumulator with the features of claim 1.
  • the sealing device has a separating agent with depth filtration properties occurring contamination, in particular in the form of the metal particles the actual sealing devices quasi filtered out of the fluid, so that the seals are no longer affected and by the depth filter cleaned fluid without affecting the gas side of the accumulator can seal.
  • the dirt holding capacity of the filter medium becomes not exhausted because of the oil between the depth filter and the elastomer seal arrives, is not exchanged.
  • the filter has a long-term effect.
  • the release agent from a felt in particular in the form of at least one felt ring.
  • felt stands for a compressed scrim random arrangement of fibers, especially natural and chemical fibers.
  • Both needle felt and full felt can be used, in which the A layer of fiber similar to that of the initial cotton wool was intertwined with barbed needles is or in the nonwoven fabric by pressure and movement under Heat and moisture are solidified.
  • Woven felt materials can also be used Woven, milled and matted fabrics are used.
  • the felt material is preferably chosen such that good filtration and in particular deep filtration properties as stated above is.
  • the release agent is a kind of filtration medium represents.
  • Piston accumulator is the separating agent with deep filtration properties as part of the Sealing device to the fluid side arranged last and the other parts the sealing device in the direction of the gas side are on the outer peripheral side Separating pistons arranged. This ensures that the felt ring is optimal can extend the life of the seals.
  • Piston accumulator is a second separating piston on the gas side of the accumulator arranged, with an intermediate space arranged between the two separating pistons is filled with a sealing medium that under the influence of is biased two separating pistons, which one another via an energy accumulator are too mobile.
  • This is a kind of variable two-part separating piston given with an intermediate gas barrier that prevents the small gas molecules with a relaxed oil side not due to the otherwise dense Sealing system in the form of the sealing rings arranged on the outer circumference Separating pistons can creep, which in the long term improves the functional reliability of the Piston accumulator would affect.
  • DE 41 41 929 A1 discloses a piston accumulator with a rigid one two-piece separating piston assembly that separates the gas side from the fluid side of the Storage separates and delimits a space between them that over a channel running radially through the wall of the storage housing surrounding atmosphere leads. Regardless of the position of the separating pistons within the storage case is the space across the channel with the Atmosphere permanently connected. When pressure changes in the surrounding Atmosphere and / or temperature changes and possibly gas leakage from the gas space along a first sealing arrangement on one of the pressure in the space between the two separating pistons the channel, so that inhibitions in the operation of the known piston accumulator are avoided. To prevent dirt and / or water from entering, a section of the corresponding channel becomes helical formed, with in the channel bore expanded to a Ductile shaped element is used, which is then the spiral running channel section results.
  • a gas loss on the gas side of the store is therefore compared to the known one Solution excluded as long as the sealing medium in the space present between the two separating pistons and biased over them is, the actual seals from damage by the Sealants with the depth filtration property are protected and therefore a such an effective overall sealing system is realized that meets all requirements justice. Otherwise, can be found on dirty channel openings in the storage case to be dispensed with.
  • the piston accumulator according to FIG. 1 has one inside a accumulator housing 10 longitudinally movable first separating piston 12, the one fluid side or separates oil side 14 from a gas side 16.
  • the storage case 10 is cylindrical, the end caps with the gas or Liquid connection for simplicity of illustration in the figure are omitted.
  • the gas side 16 is usually filled with nitrogen as the working gas and hydraulic oil is stored on the fluid side 14. So between these a pressure level that is as balanced as possible in the two pressure rooms mentioned there is basically a requirement that the friction between the sealing device designated as a whole with 18 and the inner wall of the Storage housing 10 is very small during the piston movement. For this The reason is usually the surface on the inside of the cylinder tube, that forms the memory housing 10, finely machined.
  • the conventional sealing system of the storage consists of the usual ring or O-ring seals 20 which are in the outer circumferential grooves 22 on the outer circumferential side are embedded in the separating piston 12. Furthermore, the sealing device 18 a separating agent 24 with deep filtration property, which is also in an outer circumferential groove 22 of the separating piston 12 is received.
  • the release agent 24 consists of a felt, in particular in the form of a felt ring.
  • the separating means 24 has the depth filtration property as part of the sealing device 18 towards the fluid side 14 last arranged and the other parts of the sealing device already mentioned 18 in the form of the ring seals 20 are in the direction of the gas side 16 and arranged on the separating piston 12 away from the fluid side 14 away from the outer circumference.
  • the separating piston 12 is of the type cylindrical piston with a central cylindrical inner recess 28, which opens to the gas side 16 and forms part of the same.
  • the sealing medium which is usually a highly viscous oil, is under the influence of the two separating pistons 12, 30 biased via an energy accumulator 34 are kept movable towards each other.
  • the two separating pistons 12.30 are penetrated by a connecting rod 36 and is as an energy store 34 a compression spring is provided which is located at one end within the bottom 38 the inner recess 28 of the first separating piston 12 and with the other At the end, the compression spring is supported on a fixed annular holding plate 40 from the upper free end of the connecting rod 36.
  • the sealing medium can also consist of a separation gas or a working fluid, such as it is inserted on the fluid side 14.
  • the two have Separating pistons 12, 30 each have an annular groove 42 which does not accommodate two seal rings shown serve to space 32 against the Seal the fluid side 14 and the gas side 16 in the interior.
  • the connecting rod 36 is, as far as it passes through the compression spring, with this in the inner recess 28 of the first separating piston 12 guided in the middle.
  • the first Separating piston 12 opposite end of the connecting rod 28 is in contrast firmly connected to the second separating piston 30.
  • the supply line 44 is at the bottom 38 of the inner recess 28 of the first Separating piston 12 a longitudinal channel arranged parallel to the longitudinal axis of the Connecting rod 36 runs.
  • the feed line 44 has in the area of Bottom 38 has a lubricating nipple 46, via which and via the feed line 44 the highly viscous sealing medium can be pressed into the intermediate space 32 is.
  • the injection pressure is chosen such that that in the space 32 resulting oil pressure caused by the bias of the against each other tensioned separating piston is 12.30 higher than one in operation of this Piston accumulator achievable pressure on the gas side 16 or the fluid side 14.

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)
EP98113168A 1997-09-12 1998-07-15 Accumulateur à piston avec dispositif d'étanchéité ayant un filtre à lit profond Expired - Lifetime EP0902193B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19740150 1997-09-12
DE19740150A DE19740150A1 (de) 1997-09-12 1997-09-12 Kolbenspeicher mit Tiefenfiltrationsdichtung

Publications (3)

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

Family

ID=7842159

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98113168A Expired - Lifetime EP0902193B1 (fr) 1997-09-12 1998-07-15 Accumulateur à piston avec dispositif d'étanchéité ayant un filtre à lit profond

Country Status (6)

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

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1342922A3 (fr) * 2002-03-05 2004-05-26 HYDAC Technology GmbH Accumulateur de pression
DE10052665B4 (de) * 2000-10-24 2007-02-01 Zf Sachs Ag Kolbenspeicher für eine Druckmittel-Betätigungsvorrichtung

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10111332B4 (de) * 2001-03-08 2004-08-19 Carl Freudenberg Kg Kolbenspeicher
DE10242104A1 (de) * 2002-03-06 2003-09-18 Continental Teves Ag & Co Ohg Kolbenspeicher
RU2252148C1 (ru) * 2003-12-05 2005-05-20 Федеральное государственное образовательное учреждение высшего профессионального образования "Азово-Черноморская государственная агроинженерная академия" (ФГОУ ВПО АЧГАА) Устройство для снижения жесткости трансмиссии машинотракторных агрегатов
CN103511402A (zh) * 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 一种防止液压锁闭的方法及其专用压力平衡器

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2019407B2 (de) * 1970-04-22 1975-07-10 Hydrotechnik Gmbh, 6051 Laemmerspiel Trennkolben fuer hydropneumatische Energiespeicher
CH591020A5 (en) * 1975-08-15 1977-08-31 Gfeller Hans High pressure storage reservoir - has separator of two longitudinally displaceable pistons
SE447296B (sv) * 1985-11-25 1986-11-03 Stromsholmens Mek Verkstad Avstrykaranordning vid cylinder och axiellt rorlig kolv
DE3619990A1 (de) * 1986-06-13 1987-12-17 Bosch Gmbh Robert Kolbendruckspeicher
SE459275B (sv) * 1987-10-23 1989-06-19 Volvo Flygmotor Ab Anordning foer oskadliggoerande av metallspaanor i en tryckvaetskeackumulator
DE4141929A1 (de) * 1991-12-19 1993-06-24 Bosch Gmbh Robert Kolbenspeicher

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10052665B4 (de) * 2000-10-24 2007-02-01 Zf Sachs Ag Kolbenspeicher für eine Druckmittel-Betätigungsvorrichtung
EP1342922A3 (fr) * 2002-03-05 2004-05-26 HYDAC Technology GmbH Accumulateur de pression

Also Published As

Publication number Publication date
NO984186D0 (no) 1998-09-11
ATE253177T1 (de) 2003-11-15
EP0902193B1 (fr) 2003-10-29
DE59810011D1 (de) 2003-12-04
NO320760B1 (no) 2006-01-23
DE19740150A1 (de) 1999-03-25
DK0902193T3 (da) 2004-02-23
ES2210626T3 (es) 2004-07-01
NO984186L (no) 1999-03-15
EP0902193A3 (fr) 1999-07-07

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