EP3818269A1 - Balgspeicher - Google Patents
BalgspeicherInfo
- Publication number
- EP3818269A1 EP3818269A1 EP19768743.7A EP19768743A EP3818269A1 EP 3818269 A1 EP3818269 A1 EP 3818269A1 EP 19768743 A EP19768743 A EP 19768743A EP 3818269 A1 EP3818269 A1 EP 3818269A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bellows
- storage housing
- fluid
- housing
- accumulator according
- 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
Links
- 239000012530 fluid Substances 0.000 claims abstract description 40
- 238000007789 sealing Methods 0.000 claims abstract description 22
- 238000013016 damping Methods 0.000 claims description 4
- 230000007704 transition Effects 0.000 claims description 3
- 238000000926 separation method Methods 0.000 abstract 2
- 239000007788 liquid Substances 0.000 description 12
- 238000003466 welding Methods 0.000 description 5
- 238000004804 winding Methods 0.000 description 4
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 239000000835 fiber Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- OGSYQYXYGXIQFH-UHFFFAOYSA-N chromium molybdenum nickel Chemical compound [Cr].[Ni].[Mo] OGSYQYXYGXIQFH-UHFFFAOYSA-N 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
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
- F15B1/10—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means
- F15B1/103—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with flexible separating means the separating means being bellows
-
- 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
- F15B2201/315—Accumulator separating means having flexible separating means
- F15B2201/3153—Accumulator separating means having flexible separating means the flexible separating means being bellows
-
- 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
- F15B2201/3156—Accumulator separating means having flexible separating means characterised by their attachment
-
- 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
- F15B2201/315—Accumulator separating means having flexible separating means
- F15B2201/3158—Guides for the flexible separating means, e.g. for a collapsed bladder
-
- 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
- F15B2201/405—Housings
- F15B2201/4053—Housings characterised by the material
-
- 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
- F15B2201/405—Housings
- F15B2201/4056—Housings characterised by the attachment of housing components
Definitions
- the invention relates to a bellows accumulator consisting of at least one accumulator housing and with a separating bellows movably arranged in the accumulator housing with a plurality of bellows folds, which separates two media spaces from one another, which is fixed with its stationary open end to the accumulator housing by means of a fixing device and which has at its movable other end a closure member with a device with which it is guided in the storage housing.
- Bellows accumulators of this type are state of the art, see for example DE 10 201 5 012 253 A1.
- Bellows accumulators are advantageously used in hydraulic systems, preferably to reduce or smooth pressure peaks occurring in pressure fluids.
- the outside diameter of a bellows is selected to be slightly smaller than the inside diameter of the storage housing, and the bellows is guided by the guide device of the Closure part guided such that in the working positions between the Bellows tips and the housing wall a gap is formed.
- the invention is based on the object of making available a bellows accumulator of the type mentioned at the outset which is distinguished from the prior art by increased operational reliability.
- a significant feature of the invention is that the closure part has a sealing device in addition to the guide device, which, at least in one extended end position of the separating bellows, contains a fluid space in which the bellows folds are arranged in the storage housing, by a fluid - Separated connection point in the storage housing and at least in some of the other working positions releases the relevant fluid connection.
- the sealing device of the guide device shuts off the fluid space on the outside of the bellows. Due to the enclosed fluid volume, the bellows is thereby supported against the pre-filling pressure acting from the interior and is thus secured against damage under pressure conditions in which the pre-filling pressure rises above the liquid pressure. If, in the operating state in which the liquid volume is enclosed in the gap by the sealing device, temperature changes occur with an expansion or contraction of the liquid volume corresponding to the coefficient of thermal expansion, this can lead to a deformation of the bellows.
- the gap width and thus the enclosed liquid volume are set to a small size.
- the gap dimension in bellows accumulators of this type can be less than 1 mm. With such small liquid volumes, temperature changes are uncritical even over a large range.
- the bellows accumulator according to the invention can therefore also be used with advantage in aviation applications in which high temperature differences must be reliably manageable.
- the sealing device on the closure part can advantageously be set back in reduced diameter by the guide device.
- Housing side can be provided to cooperate with the reduced diameter Dichtin direction in the housing inner diameter reducing, forming a sealing surface housing wall part.
- the closure part has a calotte at its end facing the fluid connection, the convex outer contour of which follows the inner contour of the fluid connection in the region of the fluid connection and is at least partially brought into contact with the latter in one end position. At the end position, practically no fluid dead volume remains in the area of the storage housing adjacent to the fluid connection point.
- a shoulder is formed on the inside of the storage housing, against which the separating bellows moves in its one end position while closing the connection point.
- the arrangement can be such that the heel is provided with a slope that tapers conically in the direction of the connection point and a blocked fluid transition between the guide and sealing device in its one end position that closes the connection point.
- the conical surface can form a ramp over which the sealing device runs onto a projecting sealing surface of the storage housing when the end position is reached.
- the guide device of the closure part has a guide ring with individual guide segments which are in contact with the inner wall of the storage housing in each working position of the separating piston and between which passage spaces for fluid are defined.
- the fluid space on the outside of the bellows is in communication with the fluid connection point via the passage spaces of the guide ring in the working positions of the bellows.
- the outer diameter of the bellows folds can advantageously be chosen to be slightly smaller than the assignable inner diameter of the storage housing such that subspaces are formed in the fluid space, which in total form hydraulic damping for the fluid.
- the sealing device can advantageously be arranged on the closure part between the guide device and the calotte.
- the arrangement is also advantageously made such that the bellows folds are in abutment with one another in the end position of the separating bellows on a block opposite one end position.
- the accumulator housing can be wrapped to increase its pressure stability.
- a winding referred to in technical terms as a liner, can be formed from a fiberglass composite.
- Fig. 2 shows an enlarged partial longitudinal section of the in Fig. 1 with
- Bellows accumulator has a storage housing designated as a whole as 2, which has two housing parts, one of which forms a housing main part denoted by 4 and the other forms a housing end part denoted by 6.
- the main part 4 has the shape of a pot with a circular cylindrical interior 8 and a dome-shaped pot bottom 10, which is closed except for a fluid connection point 12 coaxial to the longitudinal axis 14.
- the end part 6 has the shape of a hemispherical shell, the opening 16 except for a coaxial to the axis 14 Rudöff is closed.
- Main part 4 and end part 6 are welded together along their mutually facing end edges on a welding line 18.
- the bellows 20 is made of stainless steel, with a chromium-nickel-molybdenum steel alloy (AM350) being provided in the present example.
- AM350 chromium-nickel-molybdenum steel alloy
- the bellows 20 is welded with its last bellows side to a retaining ring 24, which forms the fixing device, with the bellows 20 is fixed to its immovable bellows end on the storage housing 2.
- the retaining ring 24 is made of stainless steel, for example steel 1.4435, and is welded to the welding line 18 by means of laser welding together with the housing parts 4 and 6.
- a closure part 36 made of high-grade steel (such as steel 1.4435), which with the facing bellows is firmly welded.
- the closure part 36 has the shape of a circular shell, on the outer circumference of which, starting from the open shell edge 38, a guide device 40 and an adjoining sealing device 42 are formed, see. Fig. 2.
- the guide device 40 in the vicinity of the shell rim of the 38 has a circumferential annular groove 46 in which a guide ring in the form of a flat ring 54 is received.
- the sealing device 42 has an annular groove 48, which is arranged axially offset from the annular groove 46 of the guide device 40 in the direction of the pot base 10 and radially inward.
- a sealing ring 50 is received in the annular groove 48.
- the closure part 36 is closed by a dome part 44.
- the flat ring 54 forming the guide ring of the guide device 40 in the annular groove 46 has the function of moving the bellows folds out of the end position shown in FIGS. 1 and 2 while maintaining a gap along the inner wall in the inner space 8 between the bellows tips and the housing wall respectively.
- the guide ring as shown in EP 2 519 748 B1 in FIGS. 5 and 6, is formed from a plastic with good sliding properties, such as polytetrafluoroethylene.
- bodies which are in contact with the housing wall as guide shoes are set back on the circumference of the flat ring 54 formed as passageways.
- the interior 8 surrounding the bellows 20 therefore forms part of the liquid side.
- the spaces between the bellows folds, the volumes of which change during operation of the bellows form damping spaces as part of the liquid side, damping throttles being formed between the tips of the folds and the inner wall of the housing, where the selected gap dimension determines the throttle cross section between the inner wall of the main part 4 and the bellows tips.
- a shoulder is formed at the transition between the main body part 4 and the pot base 10, to which the bellows 20 runs with the closure part 36 in the extended end position.
- FIG. 1 shows, the housing main part 4, starting from a thickened wall part 58, which adjoins the welding line 18, an area of reduced wall thickness which extends to the area of the Topfbo dens 10. As indicated in FIG. 1, this area has a fiber winding 60 made of glass fiber material, which extends beyond the welding line 18 to the initial area of the housing part 6.
- the structure of the fiber winding 60 which increases the compressive strength corresponds to the windings which are known in the case of pressure containers under the technical name “liner”.
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
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018007279.8A DE102018007279A1 (de) | 2018-09-14 | 2018-09-14 | Balgspeicher |
PCT/EP2019/073918 WO2020053113A1 (de) | 2018-09-14 | 2019-09-09 | Balgspeicher |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3818269A1 true EP3818269A1 (de) | 2021-05-12 |
EP3818269B1 EP3818269B1 (de) | 2022-08-10 |
Family
ID=67953757
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19768743.7A Active EP3818269B1 (de) | 2018-09-14 | 2019-09-09 | Balgspeicher |
Country Status (6)
Country | Link |
---|---|
US (1) | US11434932B2 (de) |
EP (1) | EP3818269B1 (de) |
JP (1) | JP7389794B2 (de) |
CN (1) | CN215908136U (de) |
DE (1) | DE102018007279A1 (de) |
WO (1) | WO2020053113A1 (de) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN118669373A (zh) * | 2023-11-22 | 2024-09-20 | 安徽威远新能源科技有限公司 | 一种车辆、液压悬架系统、蓄能器及其操作方法 |
Family Cites Families (23)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1366473A (en) * | 1914-04-22 | 1921-01-25 | Harry C Mallory | Expansible and collapsible element for thermostatic and pressuresensitive devices |
US3158180A (en) * | 1960-12-28 | 1964-11-24 | Greer Hydraulics Inc | Blind shell piston accumulator |
DE1803849A1 (de) * | 1968-10-18 | 1970-05-27 | Elmer Dipl Ing Adam | Hydrospeicher mit schwimmendem Kolben |
IT1185613B (it) * | 1985-05-30 | 1987-11-12 | Magnaghi Cleodinamica Spa | Accumulatore di pressione gas-olio con struttura in materiali compositi per circuiti idraulici di velivoli |
US4691739A (en) * | 1986-09-02 | 1987-09-08 | United Aircraft Products, Inc. | Bootstrap reservoir |
JPH0246301A (ja) * | 1988-08-04 | 1990-02-15 | Eagle Ind Co Ltd | アキュムレータ |
JP2000249101A (ja) | 1999-02-26 | 2000-09-12 | Nhk Spring Co Ltd | ダイヤフラムベローズを用いたアキュムレータ装置 |
EP1052412B1 (de) | 1999-05-12 | 2005-03-09 | NHK Spring Co., Ltd. | Druckspeicher und dessen Herstellungsverfahren |
DE10003648A1 (de) * | 2000-01-29 | 2001-08-09 | Hydac Technology Gmbh | Hydropneumatischer Druckspeicher |
JP2002242902A (ja) * | 2001-02-19 | 2002-08-28 | Aisin Seiki Co Ltd | アキュームレータ |
DE10116995B4 (de) * | 2001-04-05 | 2008-09-18 | Robert Bosch Gmbh | Hydraulikeinrichtung |
DE102006004120A1 (de) * | 2006-01-25 | 2007-07-26 | Hydac Technology Gmbh | Hydrospeicher |
EP1918626B1 (de) * | 2006-10-24 | 2010-03-03 | Carl Freudenberg KG | Speicher zur Dämpfung von Druckpulsationen |
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 |
WO2010040040A1 (en) | 2008-10-03 | 2010-04-08 | Eaton Corporation | Hydraulic accumulator and method of manufacture |
DE102009060852A1 (de) * | 2009-12-30 | 2011-07-07 | HYDAC Technology GmbH, 66280 | Hydrospeicher, insbesondere Pulsationsdämpfer |
EP2519747B1 (de) * | 2009-12-30 | 2013-10-09 | Hydac Technology Gmbh | Führungseinrichtung für einen metallbalg |
WO2011079852A1 (de) * | 2009-12-30 | 2011-07-07 | Hydac Technology Gmbh | Hydrospeicher, insbesondere balgspeicher |
EP2860406B1 (de) * | 2012-06-11 | 2020-01-15 | Eagle Industry Co., Ltd. | Akkumulator |
JP6165833B2 (ja) * | 2013-02-15 | 2017-07-19 | イーグル工業株式会社 | アキュムレータ |
US9683583B2 (en) * | 2013-08-02 | 2017-06-20 | Eagle Industry Co., Ltd. | Metal bellows |
DE102015005395A1 (de) | 2015-04-28 | 2016-11-03 | Hydac Technology Gmbh | Hydrospeicher |
DE102015012253A1 (de) * | 2015-09-18 | 2017-03-23 | Hydac Technology Gmbh | Balgspeicher, insbesondere Pulsationsdämpfer |
-
2018
- 2018-09-14 DE DE102018007279.8A patent/DE102018007279A1/de not_active Withdrawn
-
2019
- 2019-09-09 US US17/275,745 patent/US11434932B2/en active Active
- 2019-09-09 EP EP19768743.7A patent/EP3818269B1/de active Active
- 2019-09-09 CN CN201990001008.6U patent/CN215908136U/zh active Active
- 2019-09-09 WO PCT/EP2019/073918 patent/WO2020053113A1/de unknown
- 2019-09-09 JP JP2021514089A patent/JP7389794B2/ja active Active
Also Published As
Publication number | Publication date |
---|---|
CN215908136U (zh) | 2022-02-25 |
JP7389794B2 (ja) | 2023-11-30 |
EP3818269B1 (de) | 2022-08-10 |
US20220034334A1 (en) | 2022-02-03 |
DE102018007279A1 (de) | 2020-03-19 |
US11434932B2 (en) | 2022-09-06 |
WO2020053113A1 (de) | 2020-03-19 |
JP2022500602A (ja) | 2022-01-04 |
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