EP1239196A2 - Kolbenspeicher - Google Patents
Kolbenspeicher Download PDFInfo
- Publication number
- EP1239196A2 EP1239196A2 EP02000825A EP02000825A EP1239196A2 EP 1239196 A2 EP1239196 A2 EP 1239196A2 EP 02000825 A EP02000825 A EP 02000825A EP 02000825 A EP02000825 A EP 02000825A EP 1239196 A2 EP1239196 A2 EP 1239196A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- ring
- piston
- sealing
- piston accumulator
- space
- 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.)
- Withdrawn
Links
Images
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
Definitions
- the invention relates to a piston accumulator, comprising at least one Separating piston which is axially reciprocable in a cylinder and for Sealing a space filled with a gaseous medium against one at least on the outside circumference with a space filled with a liquid medium two sealing rings arranged adjacent to one another with axial spacing has, wherein one of the sealing rings is designed as an O-ring.
- Such a piston accumulator is known from DE 36 19 457 A1.
- the Piston accumulators are used in hydraulic systems, whereby the Separating piston to seal it against the inner wall of the cylinder on the two each end of its outer circumference a groove-shaped recess has, in each of which a ring seal made of elastomeric material is arranged that its annular groove is directed to the relevant piston face is.
- the invention has for its object a piston accumulator at the beginning continue to develop in such a way that it is good Features of use for a long period of use in a very has a wide temperature range and is therefore used in motor vehicles Application can come.
- the O-ring on the Room with liquid medium facing side is arranged and from a Low-temperature elastomer and that the second sealing ring on the Room with gaseous medium facing side as a lip seal is formed, the sealing lips by a metallic tension spring to the sealing surfaces of separating pistons and / or cylinders can be created.
- the piston accumulator can also be used in automobiles because it is good Features of use over a long period of use in one Has temperature range, which is at least from - 40 ° C to + 150 ° C. extends.
- the service life in this temperature range is at least 10 years and the total number of cycles more than 1 million Load changes.
- the piston accumulator Due to the good usage properties of the piston accumulator is the leakage from the pressurized rooms, one of which with a liquid, the other with a gas, e.g. nitrogen, is filled, negligibly small, so that the overall system of which the piston accumulator forms part, works very reliably.
- a gas e.g. nitrogen
- a key advantage is the metal tension spring of the lip seal to see. Especially when used in temperature ranges below - 30 ° C pure elastomer seals no longer have sufficient elasticity, so that reliable sealing is no longer guaranteed.
- the piston accumulator according to the invention are too economically justifiable Excellent costs even under extreme operating conditions Usage properties ensured, even at temperatures of less than - 30 ° C, gas can escape to the liquid side is excluded.
- the low-temperature elastomer that makes up the O-ring can For example, preferably formed by a fluorocarbon rubber (FPM) his.
- FPM fluorocarbon rubber
- the advantage of this material is that it is low Compression set after a long high temperature phase, one low permeation after a long storage period and low wear with more than 1 million load changes. A good seal of the O-ring at Temperatures from - 30 ° C to 200 ° C are possible without any problems.
- the U-ring seal can be essentially C-shaped, open axially towards the room with gaseous medium be trained.
- a seal that is used, for example can be formed by the applicant's piston seal PFTE-Forseal his.
- the U-ring seal acts against the gas pressure on one side, whereby the metallic tension spring even at temperatures below - 30 ° C sufficiently large elastic pressure of the sealing lips on the surfaces to be sealed.
- Fig. 1 an embodiment of a piston accumulator is shown, the two Rooms 3, 4 seals against each other.
- Room 3 is with a gaseous Medium, for example filled with nitrogen.
- Room 4 is, for example, with oil filled.
- the separating piston 1 is a function of the one lying against it Pressure difference between the rooms 3, 4 in the axial direction within the Cylinder 2 reciprocated.
- the outer side of the separating piston 1 is from two sealing rings 5, 6 adjacent to one another with an axial spacing enclosed, wherein the first sealing ring 5 is formed as an O-ring 7 and out a fluorocarbon rubber (FPM), a low-temperature elastomer, consists.
- FPM fluorocarbon rubber
- Such elastomers retain their good performance properties a temperature range from - 30 ° C to 200 ° C.
- the second sealing ring on the room 3 with gaseous medium facing side of the separating piston 1 is as a lip seal 8 formed, the sealing lips 9, 10 by the metallic tension spring 11 to the surfaces 12, 13 of the separating piston 1 and cylinder 2 to be sealed are pressed.
- a guide belt 14 in this exemplary embodiment arranged, which consists of PTFE.
- the U-ring seal from Fig. 1 is shown as a single part.
- the groove ring seal 8 viewed in longitudinal section, is substantially C-shaped, axially in Direction of the room 3 with gaseous medium open, the metallic Tension spring 11 limits the C-shaped recess on the outer peripheral side.
- the Tension spring 11 is preferably made of a stainless spring steel, so that consistently good usage properties under all operating conditions during a long period of use. A reliable sealing takes place even at temperatures below -30 ° C.
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)
Abstract
Description
Claims (3)
- Kolbenspeicher, umfassend zumindest einen Trennkolben, der in einem Zylinder axial hin- und herbewegbar ist und zur Abdichtung eines mit einem gasförmigen Medium gefüllten Raums gegen einen mit einem flüssigen Medium gefüllten Raum außenumfangsseitig zumindest zwei mit axialem Abstand zueinander benachbart angeordnete Dichtringe aufweist, wobei einer der Dichtringe als O-Ring ausgebildet ist, dadurch gekennzeichnet, dass der O-Ring (7) auf der dem Raum (4) mit flüssigem Medium zugewandten Seite angeordnet ist und aus einem Tieftemperatur-Elastomer besteht und dass der zweite Dichtring (6) auf der dem Raum (3) mit gasförmigem Medium zugewandten Seite als Nutring-Dichtung (8) ausgebildet ist, deren Dichtlippen (9, 10) durch eine metallische Spannfeder (11) an die abzudichtenden Flächen (12, 13) von Trennkolben (1) und / oder Zylinder (2) anlegbar sind.
- Kolbenspeicher nach Anspruch 1, dadurch gekennzeichnet, dass das Tieftemperatur-Elastomer durch einen Fluor-Karbonkautschuk (FPM) gebildet ist.
- Kolbenspeicher nach einem der Ansprüche 1 oder 2, dadurch gekennzeichnet, dass die Nutring-Dichtung (8), im Längsschnitt betrachtet, im Wesentlichen C-förmig, axial in Richtung des Raums (3) mit gasförmigem Medium offen ausgebildet ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2001111332 DE10111332B4 (de) | 2001-03-08 | 2001-03-08 | Kolbenspeicher |
DE10111332 | 2001-03-08 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1239196A2 true EP1239196A2 (de) | 2002-09-11 |
EP1239196A3 EP1239196A3 (de) | 2004-09-15 |
Family
ID=7676839
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02000825A Withdrawn EP1239196A3 (de) | 2001-03-08 | 2002-01-15 | Kolbenspeicher |
Country Status (2)
Country | Link |
---|---|
EP (1) | EP1239196A3 (de) |
DE (1) | DE10111332B4 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100376807C (zh) * | 2006-07-12 | 2008-03-26 | 三一重工股份有限公司 | 活塞式蓄能器 |
CN105673858A (zh) * | 2014-12-05 | 2016-06-15 | 舍弗勒技术股份两合公司 | 用于摩擦离合器或制动缸的液压操纵件的密封件及带相应密封件的液压操纵件 |
WO2018134244A1 (de) * | 2017-01-17 | 2018-07-26 | Liebherr-Components Kirchdorf GmbH | Zylinder-kolben-vorrichtung mit einem aus einem faserverbundwerkstoff gefertigten zylinder |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017114621B4 (de) * | 2017-06-30 | 2021-04-22 | Schaeffler Technologies AG & Co. KG | Deckelanordnung zum Abdecken eines ringförmigen Hohlraums |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3619457A1 (de) | 1986-06-10 | 1987-12-17 | Bolenz & Schaefer Maschf | Zylindrischer druckspeicher fuer hydraulikanlagen |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1509067A (fr) * | 1966-11-29 | 1968-01-12 | Sud Aviation | Piston pour accumulateur hydraulique |
DK34980A (da) * | 1980-01-28 | 1981-07-29 | W S Shamban Europs A S | Taetningsindretning med indlagt aktiveringsfjeder |
US5163692A (en) * | 1989-07-24 | 1992-11-17 | Furon Company | One-piece composite lip seal |
DE19740150A1 (de) * | 1997-09-12 | 1999-03-25 | Hydac Technology Gmbh | Kolbenspeicher mit Tiefenfiltrationsdichtung |
EP0907030A1 (de) * | 1997-10-04 | 1999-04-07 | Itt Manufacturing Enterprises, Inc. | Druckmittelspeicher, insbesondere für Fahrzeug-Bremsanlagen |
-
2001
- 2001-03-08 DE DE2001111332 patent/DE10111332B4/de not_active Expired - Fee Related
-
2002
- 2002-01-15 EP EP02000825A patent/EP1239196A3/de not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3619457A1 (de) | 1986-06-10 | 1987-12-17 | Bolenz & Schaefer Maschf | Zylindrischer druckspeicher fuer hydraulikanlagen |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN100376807C (zh) * | 2006-07-12 | 2008-03-26 | 三一重工股份有限公司 | 活塞式蓄能器 |
CN105673858A (zh) * | 2014-12-05 | 2016-06-15 | 舍弗勒技术股份两合公司 | 用于摩擦离合器或制动缸的液压操纵件的密封件及带相应密封件的液压操纵件 |
WO2018134244A1 (de) * | 2017-01-17 | 2018-07-26 | Liebherr-Components Kirchdorf GmbH | Zylinder-kolben-vorrichtung mit einem aus einem faserverbundwerkstoff gefertigten zylinder |
Also Published As
Publication number | Publication date |
---|---|
DE10111332A1 (de) | 2002-09-19 |
EP1239196A3 (de) | 2004-09-15 |
DE10111332B4 (de) | 2004-08-19 |
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