EP0854296B1 - Kolbenspeicher mit Dichtungsvorrichtung - Google Patents
Kolbenspeicher mit Dichtungsvorrichtung Download PDFInfo
- Publication number
- EP0854296B1 EP0854296B1 EP97118384A EP97118384A EP0854296B1 EP 0854296 B1 EP0854296 B1 EP 0854296B1 EP 97118384 A EP97118384 A EP 97118384A EP 97118384 A EP97118384 A EP 97118384A EP 0854296 B1 EP0854296 B1 EP 0854296B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- separating
- pistons
- accumulator
- connecting rod
- 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
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
- F15B2201/20—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
- F15B2201/315—Accumulator separating means having flexible separating means
- F15B2201/3157—Sealings for the flexible separating 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
- F15B2201/30—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
- F15B2201/411—Liquid ports having valve means
Definitions
- the invention relates to a piston accumulator with the features of Preamble of claim 1.
- Piston accumulators are known in a variety of designs and on the market available.
- the essential components of a piston accumulator are the outer, the cylinder housing forming the cylinder housing, which is why the piston cylinder as well are designated with cylinder memory, the separating piston with the sealing system in the form of sealing rings attached to its outer circumference and the sealing caps on the front, which also simultaneously cover the liquid or Include gas connection.
- the storage case comes essentially two tasks too; on the one hand it serves to absorb the internal pressure and on the other hand, it causes the separating piston to guide the separating element represents between gas and fluid side.
- the object of the invention to create a piston accumulator that works even under extreme conditions maintains its tightness during long periods of use and ensures that none Operating state gas can escape to the fluid side.
- a pertinent one The object is achieved by a piston accumulator with the features of claim 1.
- Preload device has an energy store and a connecting rod, which passes through the two separating pistons are under the force of mentioned biasing device the two separating pistons towards each other movable that the sealing medium is biased and due to the Forced coupling of the separating pistons via the pretensioning device is prevented that the small gas molecules with the oil side relaxed are not otherwise tight sealing system in the form of the sealing rings arranged on the outer circumference the separating piston creep can affect the long-term reliability of the piston accumulator would.
- the pressure of the sealing medium in the space above the Force application of the pretensioner acting on the two positively coupled Separating piston acts is chosen such that it is always higher than an im Operation achievable pressure on the gas or fluid side. So the operating state plays the piston accumulator for the sealing device no role, because the critical gas seal is always below one of the pretensioning devices appropriate pressure. A gas loss on the gas side of the Storage is therefore excluded as long as the sealing medium in the space preloaded between the two separating pistons and over them is available.
- the piston accumulator according to FIG. 1 has one inside a accumulator housing 10 longitudinally movable first separating piston 12 which has a fluid side or Separates oil side 14 from a gas side 16.
- the storage housing 10 is cylindrical formed, the end caps with the gas or liquid connection are omitted in the figure for the sake of simplicity of illustration.
- a further second separating piston 18 is located on the fluid side 14 of the accumulator arranged, one arranged between the two separating pistons 12, 18 Intermediate space 20 can be filled with a sealing medium.
- the gas side 16 is generally filled with nitrogen as the working gas and hydraulic oil is stored on the fluid side 14. So between these two mentioned pressure rooms as balanced as possible Pressure level exists, there is basically the requirement that the friction between the piston seal (not shown) and the inner wall of the accumulator housing 10 is very small during the piston movement. For this reason, in usually the surface on the inside of the cylinder barrel that holds the storage case 10 forms, finely machined.
- the conventional sealing system consists of conventional ring or O-ring seals, in the outer circumferential grooves 22 on the outer circumferential side in the respective Separating pistons 12, 18 are inserted.
- the first separating piston 12 is cylindrical Piston formed with a central cylindrical inner recess 24.
- the second separating piston 18 is more like a cylindrical separating plate executed.
- the sealing medium which is usually a highly viscous oil, is exposed of the two separating pistons 12, 18 over the one designated as a whole by 50 Biasing device biased, the two separating pistons 12, 18 over an energy accumulator 26 of the pretensioning device 50 can be moved towards one another are held.
- the two separating pistons 12, 18 are from a connecting rod 28 penetrated and as a force accumulator 26, a compression spring is provided is supported with one end on the bottom 30 of the first separating piston 12, which in Looking towards the Fig.1 seen the cylindrical inner recess 24 after limited at the bottom and with the other end the compression spring is supported a fixed annular holding plate 32 at the upper free end of the Connecting rod 28 from.
- the sealing medium can also come from a separation gas consist of or from the working fluid as used on the fluid side 14.
- the two have Separating piston 12, 18 in turn has an annular groove 34, which accommodates two Seal rings, not shown, serve to face the intermediate space 20 to seal the fluid side 14 and the gas side 16.
- the connecting rod 28, insofar as it extends through the compression spring, with the latter in the inner recess 24 of the first separating piston 12 guided in the middle.
- the first Separating piston 12 facing away from the connecting rod 28 is fixed to the second separating piston 18 connected.
- a closable supply line 36 is at the bottom 30 of the inner recess 24 of the first separating piston 12 a longitudinal channel arranged parallel to the Longitudinal axis of the connecting rod 28 runs.
- the feed line 36 has in Area of the floor 30 on a grease nipple 38, over and over the Supply line 36 the highly viscous sealing medium in the intermediate space 20th can be pressed in.
- the injection pressure is chosen such that the in Gap 20 resulting oil pressure, caused by the bias the mutually braced separating piston 12, 18 is higher than one in operation this piston accumulator achievable pressure on the gas side 16 or Fluid side 14.
- Fig.1 is an effective Sealing device that prevents even over long periods of time, that gas can escape to the oil side, which otherwise leads to a loss of function of the memory leads.
- the connecting rod 28 of the pretensioning device designated as a whole by 50 2 has the lubricating nipple 38 along its longitudinal center and the feed line 36, which with a side channel on the Lubricating nipple 38 opposite end opens into the space 20.
- the first separating piston 12 has a closable one Vent line 40, which is parallel to the longitudinal axis of the connecting rod 28 is arranged and with one end in the space 20 opens and with its other end via a vent screw 42 is lockable.
- the holding plate 32 in the embodiment according to Fig.2 forms a web-like widening of the upper end of the connecting rod 28 and with its underside the system for the energy accumulator 26 in the form of Spring.
- a contact surface 44 on the first separating piston 12 provided on which a circumferential shoulder-like widening 46 of the Connecting rod 28 can support, if, as shown in Fig.2, the Compression spring is fully compressed.
- the annular contact surface 44 is thereby from a protruding into the inner recess 24 of the first separating piston Pin 48 formed, which is in one piece part of the separating piston 12.
- this is facing the second separating piston 18 End of the connecting rod 28 with this via a stop 54 supported, the stop 54 in the effective direction of the compression spring in an annular recess 52 on the underside of the separating piston 18 is supported on this.
- the stop 54 is through an outer peripheral side in a lower paragraph of the connecting rod 28 engaging circlip educated.
- the second embodiment is a compact one Sealing device realized, in addition to a feed line 36 for the highly viscous Sealing medium also the possibility of ventilation via the Vent line 40 has.
- the gas and the fluid side exchanged with each other i.e. the gas side 16 becomes the fluid side and the fluid side 14 to the gas side.
- the hydraulic accumulators suffer fundamentally with gas loss, so that gas migrates to the oil side. In the present Embodiment would then the pressure in the space 20 via the spring force climb out. If, as indicated above, the room 14 the Forms gas side and the fluid space 16 is depressurized, the piston unit sits with the separating piston 12, 18 on the fluid side on the housing-side cover (not shown) of the memory housing 10. The one acting on the gap 20 Force is then the gas pressure force + the spring force. For tightness itself, however, is only the differential pressure between gas space 14 and the space 20 effective.
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-Damping Devices (AREA)
- Sealing Devices (AREA)
Description
- Fig.1
- einen Längsausschnitt des Kolbenspeichers;
- Fig.2
- eine geänderte Ausführungsform der Trennkolbenanordnung nach der Fig.1.
Claims (7)
- Kolbenspeicher mit einem innerhalb eines Speichergehäuses (10) längsverfahrbaren ersten Trennkolben (12) und einem zweiten Trennkolben (18), die zwei Speicherräume, insbesondere eine Fluidseite (14) von einer Gasseite (16) trennen, wobei ein zwischen den beiden Trennkolben (12, 18) angeordneter Zwischenraum (20) mit einem Dichtmedium befüllt ist und wobei unter der Krafteinwirkung einer Vorspanneinrichtung (50) die beiden Trennkolben (12, 18) derart aufeinander zu bewegbar sind, daß das Dichtmedium vorgespannt ist, dadurch gekennzeichnet, daß die Vorspanneinrichtung (50) einen Kraftspeicher (26) und eine Verbindungsstange (28) aufweist, die die beiden Trennkolben (12,18) durchgreift.
- Kolbenspeicher nach Anspruch 1, dadurch gekennzeichnet, daß als Kraftspeicher (26) eine Druckfeder vorgesehen ist, die sich mit einem Ende an dem ersten Trennkolben (12) und mit dem anderen Ende an der Verbindungsstange (28) abstützt.
- Kolbenspeicher nach Anspruch 2, dadurch gekennzeichnet, daß die Verbindungsstange (28) soweit sie die Druckfeder durchgreift mit dieser in einer Innenausnehmung (24) des ersten Trennkolbens (12) mittig geführt ist.
- Kolbenspeicher nach Anspruch 2 oder 3, dadurch gekennzeichnet, daß das dem zweiten Trennkolben (18) zugewandte Ende der Verbindungsstange (28) mit diesem fest verbunden ist oder über einen Anschlag (50) in Wirkrichtung der Druckfeder sich an diesem abstützt.
- Kolbenspeicher nach einem der Ansprüche 1 bis 4, dadurch gekennnzeichnet, daß mindestens einer der Trennkolben (12) eine verschließbare Zuführleitung (36) für das Dichtmedium aufweist, die in den Zwischenraum (20) mündet.
- Kolbenspeicher nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß mindestens einer der Trennkolben (12) eine verschließbare Entlüftungsleitung (40) aufweist, die in den Zwischenraum (20) mündet.
- Kolbenspeicher nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß das Dichtmedium ein hochviskoses Öl ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19701303A DE19701303A1 (de) | 1997-01-16 | 1997-01-16 | Kolbenspeicher mit Dichtungsvorrichtung |
DE19701303 | 1997-01-16 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0854296A2 EP0854296A2 (de) | 1998-07-22 |
EP0854296A3 EP0854296A3 (de) | 1999-07-07 |
EP0854296B1 true EP0854296B1 (de) | 2003-06-04 |
Family
ID=7817526
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97118384A Expired - Lifetime EP0854296B1 (de) | 1997-01-16 | 1997-10-23 | Kolbenspeicher mit Dichtungsvorrichtung |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0854296B1 (de) |
AT (1) | ATE242431T1 (de) |
DE (2) | DE19701303A1 (de) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10207181A1 (de) * | 2001-11-05 | 2003-05-15 | Continental Teves Ag & Co Ohg | Kolbenspeicher |
DE10209663C1 (de) * | 2002-03-05 | 2003-07-31 | Hydac Technology Gmbh | Druckspeicher |
DE10242104A1 (de) * | 2002-03-06 | 2003-09-18 | Continental Teves Ag & Co Ohg | Kolbenspeicher |
NO329959B1 (no) | 2008-08-29 | 2011-01-31 | Tool Tech As | Fremgangsmate for bruk av nye spyleporter ved rengjoring av en stempelakkumulator |
CN104514758A (zh) * | 2013-09-27 | 2015-04-15 | 陈启星 | 基于集液器和夹心活塞的液封蓄能器及其液压系统 |
CN104295540B (zh) * | 2014-05-28 | 2017-10-20 | 国家电网公司 | 带气体泄漏报警装置的蓄能器及液压操动机构 |
DE102022000975A1 (de) | 2022-03-22 | 2023-09-28 | Hydac Technology Gmbh | Kolbenspeicher |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2008740A1 (de) * | 1970-02-25 | 1971-09-09 | Langen & Co | Hydro pneumatischer Kolbendruck speicher |
CH591020A5 (en) * | 1975-08-15 | 1977-08-31 | Gfeller Hans | High pressure storage reservoir - has separator of two longitudinally displaceable pistons |
CA1180979A (en) * | 1981-10-26 | 1985-01-15 | Deere & Company | Piston sealing arrangement |
-
1997
- 1997-01-16 DE DE19701303A patent/DE19701303A1/de not_active Withdrawn
- 1997-10-23 EP EP97118384A patent/EP0854296B1/de not_active Expired - Lifetime
- 1997-10-23 AT AT97118384T patent/ATE242431T1/de not_active IP Right Cessation
- 1997-10-23 DE DE59710219T patent/DE59710219D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP0854296A2 (de) | 1998-07-22 |
EP0854296A3 (de) | 1999-07-07 |
ATE242431T1 (de) | 2003-06-15 |
DE19701303A1 (de) | 1998-07-23 |
DE59710219D1 (de) | 2003-07-10 |
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