EP2519747A1 - Guiding device for metal bellows - Google Patents
Guiding device for metal bellowsInfo
- Publication number
- EP2519747A1 EP2519747A1 EP09801177A EP09801177A EP2519747A1 EP 2519747 A1 EP2519747 A1 EP 2519747A1 EP 09801177 A EP09801177 A EP 09801177A EP 09801177 A EP09801177 A EP 09801177A EP 2519747 A1 EP2519747 A1 EP 2519747A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bellows
- annular
- housing
- guide device
- annular surface
- 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
- 239000002184 metal Substances 0.000 title claims abstract description 11
- 230000002093 peripheral effect Effects 0.000 claims abstract description 7
- 239000012530 fluid Substances 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 6
- 230000006835 compression Effects 0.000 abstract 1
- 238000007906 compression Methods 0.000 abstract 1
- 239000007789 gas Substances 0.000 description 14
- 238000004519 manufacturing process Methods 0.000 description 5
- 238000003466 welding Methods 0.000 description 4
- 239000006096 absorbing agent Substances 0.000 description 3
- 238000013016 damping Methods 0.000 description 3
- 238000009434 installation Methods 0.000 description 3
- 230000010349 pulsation Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000004323 axial length Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 1
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
- 238000007789 sealing Methods 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
- F15B2201/3158—Guides for the flexible separating means, e.g. for a collapsed bladder
Definitions
- the invention relates to a guide device for a metal bellows, which has on at least one Balgende a movable during extension and contraction of the bellows along the wall of a housing end body, wherein between this and the housing, a guide means is present.
- Metal bellows are used in various technical fields as a variable-length component, for example, if a length compensation lines or couplings for fluid media is required. Metal bellows are also very common
- Hydraulic accumulators used as a movable separating element between the gas side and the fluid side.
- Hydraulic accumulators used as a movable separating element between the gas side and the fluid side.
- These guide bodies are designed as guide shoes, which engage over the peripheral edge of the pot in the cup-shaped end body whose nikzyl Indian side wall extends into the interior of the bellows.
- guide bodies formed from a plastic material with good sliding properties, good guiding properties are achieved, ie the guide allows reliable long-term operation with favorable friction conditions between guide body and housing wall.
- the production is complicated and cost intensive.
- the individual guide body which are made in a separate manufacturing step, must be brought to the installation site and mounted on the end edge of the end body of the bellows concerned.
- the guide body are designed as guide shoes with a cross-sectionally U-shaped profile, whose legs engage over the end edge of the pot-like end body.
- both at the end edge of the pot a catch and inside the profile of the guide shoes at least one undercut must be present to allow the securing of the guide body by clipping.
- the formation of undercuts requires a complex production of the guide shoes by compression molding.
- the object of the invention is to provide a guide device which, while maintaining the good guiding and operating properties of the mentioned solution of the prior art, is characterized by a substantial simplification of the production and thus a reduction of the production costs.
- a guide device having the features of claim 1 in its entirety. Accordingly, a significant feature of the invention is that the guide means has a surrounding a peripheral region of the end body of the bellows annular body and that it forms on its outer circumference both annular surface parts which have a radial distance from the wall of the housing, as well as distributed over the outer circumference, radially forms over the first ring surface parts protruding second ring surface parts. These radially projecting annular surface parts in this case form the guided on the housing wall sliding surfaces which separate the radially radially withdrawn first annular surface parts in the circumferential direction from each other.
- a uniform ring body thus assumes not only the function of the guide body of the solution according to the prior art, but also the formation of the fluid passages between the housing wall and the end body of the bellows at the radially located between the second Ring lake constitution first Ring lake former.
- the ring body is formed of a plastic material with good sliding properties, resulting in a lightweight, easy to produce by injection molding construction.
- the bellows is fixed at the housing end opposite the moveable end body to a housing-fixed retaining ring, which holds the interior of the bellows opposite the wall of the housing. seals the housing, wherein the end body forms a the interior of the bellows on the associated Balgende sealing final closure body.
- a housing-fixed retaining ring which holds the interior of the bellows opposite the wall of the housing. seals the housing, wherein the end body forms a the interior of the bellows on the associated Balgende sealing final closure body.
- the arrangement may advantageously be made such that the respective annular body engages with a ring part forming the first annular surface parts in a circumferential annular groove which is arranged on the end body.
- This enlargement of the distance of the guide point from the immovable bellows end favors the tilting safety of the guide.
- the securing of the ring body by snapping into an annular groove allows a particularly simple installation.
- the annular body may have an inner ring part with at least one radially inwardly into the associated annular groove projecting inner edge and an outer ring part, on the outside of the first and second Ring vomer are formed, wherein the outer ring part and first and second annular surface part has a greater axial width than having the width of the annular groove and the width of the inner edge of the inner ring part received therein.
- Such a configuration of the annular body opens up the possibility of forming the axial dimension of the second annular surface parts formed on the outer ring part, which form the actual sliding surfaces on the housing wall, with an axially much larger dimension than corresponds to the width of the annular groove securing the annular body.
- the arrangement can be made so that the bottom of the housing nearest the end of the inner ring part of the Ring body forms a radially inwardly projecting lip, which extends from the radially outer edge region inwardly and limits the edge region on a narrow annular surface.
- the device thus forms a narrow, axially projecting edge region of the contact surface in the system on the surface of the housing bottom in the fully extended state of the bellows.
- the second annular surface parts are arranged at equal angular distances from one another, wherein for a low-friction but secure guidance preferably 4 to 12 second annular surface parts are present on the relevant annular body.
- the invention is according to claim 8, a hydraulic accumulator with a storage housing in which a metal bellows is provided as a movable separating element between a gas side and a fluid side, for which a guide device according to one of claims 1 to 7 is present.
- FIG. 1 shows a longitudinal section of a hydraulic accumulator intended for use as a shock absorber, with a slightly smaller, schematically simplified schematic view of a hydraulic accumulator serving as a movable separating element between the gas side and the fluid side. bellows, provided with a guide device according to an embodiment of the invention;
- FIGs. 1 to 6 show an embodiment of the guide device according to the invention in a hydraulic accumulator in the form of a shock absorber.
- a storage housing designated as a whole by 1 has a housing main part 3 in the form of a circular cylindrical pot which is closed at the end lying in the drawing except for a filling opening 7, which is aligned with the housing longitudinal axis 9 and in the illustration of FIG a weld core is sealed fluid-tight.
- a closing part 13 is welded tightly to the housing main part 3 along a welding line 16.
- a fluid inlet 1 5 with an outer connection piece 1 7.
- a threaded protection cap 20 is screwed onto the external thread of the connecting piece 17.
- a metal bellows unit forms a movable separating element between a gas side 21, which adjoins the closing part 13 and can be filled via the filling opening 7 with a working gas, preferably N 2, with a gas pre-filling pressure.
- a working gas preferably N 2
- a gas pre-filling pressure preferably N 2
- the bellows unit is welded in a fluid-tight manner to the bellows end 29 adjacent the housing end part 13, more precisely to the radially outer edge of the last bellows fold, with a metallic retaining ring 25.
- the retaining ring 25 in turn is welded to the storage housing at the separation point between the end part 13 and the main part 3 at the weld line 16.
- the welding line 16 is thermally insulated at least partially via the retaining ring 25 from the bellows 29.
- the welding region of the bellows 29 on the retaining ring 25 is indicated in the figure by 27, the point where the retaining ring 25 forms an axial bulge as a welding area.
- the housing-fixed Balgende 29 opposite, movable bellows 31 is welded to the radially outer end edge of the last Balgfalte with a metallic end body 35 which forms a closure body which closes the interior of the bellows 19 fluid-tight and thus forms the separation between the gas side 21 and fluid side 23.
- a cylindrical insert body 73 which extends from the end portion 13 into the interior of the bellows 19, causes a corresponding reduction in the volume of the gas side 21 and at the same time forms an end stop, at which the movable end body 35 of the bellows 19 starts in the fully contracted state.
- the bellows 19 is shown in its almost fully extended position, in which the end body 35 is located at a small distance from the flat bottom surface 71 of the bottom 69.
- the end body 35 is on the inside of the bellows 1 9 side facing substantially planar, except for an axially slightly protruding peripheral edge 75, the weld at the associated bellows end 31 forms. Axially offset from the peripheral edge 75, the end body 35 forms an annular groove 77 as a seat for an inner ring part 79 of the annular body 47 of the guide device. Axially offset relative to the annular groove 77, the end body 35 forms a step, against whose step surface a radially inwardly protruding lip 81 of the annular part 79 rests.
- the annular body 47 is formed from a plastic material with good sliding properties and can be produced by means of turning or milling, but can also be formed as a press-formed component.
- a peculiarity of the ring body 47 consists, as best seen in Fig. 6, in that the lip 81 between the radially outer end 85 and its inner end forms an inclined surface 87, such that the annular body 47 at the end 85 a relatively narrow Edge area forms.
- the fluid side 23 is to be smoothed via the inlet 15 with a pressure fluid, in particular hydraulic fluid, a fuel or lubricant in fluid communication to occur pressure surges.
- a pressure fluid in particular hydraulic fluid, a fuel or lubricant in fluid communication to occur pressure surges.
- the gas side 21 is not only filled with working gas, but also contains a predetermined volume fraction of a fluid.
- a combination of nitrogen gas as the working gas and ethylene alcohol as the fluid on the gas side 21 of the storage has proved to be particularly advantageous.
- the fluid between folds and deflections of the bellows 19 form a damping support medium, on which the folded wall parts of the bellows 19 can be supported on the fluid as an abutment, resulting in an increase in the life of the bellows and thus to an increase in functional safety leads. This is especially true for rapid pulsations and rapid pressure surges.
Abstract
Description
Claims
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/EP2009/009330 WO2011079851A1 (en) | 2009-12-30 | 2009-12-30 | Guiding device for metal bellows |
Publications (2)
Publication Number | Publication Date |
---|---|
EP2519747A1 true EP2519747A1 (en) | 2012-11-07 |
EP2519747B1 EP2519747B1 (en) | 2013-10-09 |
Family
ID=42751683
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP09801177.8A Active EP2519747B1 (en) | 2009-12-30 | 2009-12-30 | Guiding device for metal bellows |
Country Status (4)
Country | Link |
---|---|
US (1) | US8844575B2 (en) |
EP (1) | EP2519747B1 (en) |
JP (1) | JP5711264B2 (en) |
WO (1) | WO2011079851A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007036487A1 (en) * | 2007-08-01 | 2009-02-05 | Hydac Technology Gmbh | Guide device for a metal bellows |
DE102009060852A1 (en) * | 2009-12-30 | 2011-07-07 | HYDAC Technology GmbH, 66280 | Hydraulic accumulator, in particular pulsation damper |
DE102018007280A1 (en) * | 2018-09-14 | 2020-03-19 | Hydac Technology Gmbh | Bellows accumulator |
DE102018007279A1 (en) * | 2018-09-14 | 2020-03-19 | Hydac Technology Gmbh | Bellows accumulator |
US11761507B2 (en) * | 2021-02-10 | 2023-09-19 | DRiV Automotive Inc. | Weight optimized bellow accumulator |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2592850B2 (en) | 1987-07-29 | 1997-03-19 | ヤマハ発動機株式会社 | Hub mounting device for vehicle having rear two wheels |
JPH0417847Y2 (en) * | 1987-08-25 | 1992-04-21 | ||
JPH0267136A (en) | 1988-09-01 | 1990-03-07 | Mitsubishi Heavy Ind Ltd | Origin control method of ink remote control apparatus |
JPH02113139A (en) | 1988-10-20 | 1990-04-25 | Nhk Spring Co Ltd | Accumulator |
JPH0267136U (en) * | 1988-11-10 | 1990-05-21 | ||
JP2539905B2 (en) * | 1989-01-20 | 1996-10-02 | 日本発条株式会社 | Accumulator |
JP3692638B2 (en) * | 1996-07-04 | 2005-09-07 | 日本発条株式会社 | Metal bellows accumulator |
DE60018503T2 (en) * | 1999-05-12 | 2006-04-13 | NHK Spring Co., Ltd., Yokohama | Pressure accumulator and its production process |
JP2005505731A (en) * | 2001-10-16 | 2005-02-24 | コンティネンタル・テーベス・アクチエンゲゼルシヤフト・ウント・コンパニー・オッフェネ・ハンデルスゲゼルシヤフト | Pressure medium accumulator |
DE10205814A1 (en) * | 2002-02-13 | 2003-08-14 | Bosch Gmbh Robert | Pressure media storage unit for electrohydraulic brake comprises a gas and fluid separation element provided with a guide which is constituted as a valve blocking two fluid spaces from one another |
DE102004004341A1 (en) | 2004-01-29 | 2005-08-18 | Hydac Technology Gmbh | Pressure accumulator, in particular pulsation damper |
JP4735811B2 (en) * | 2005-04-15 | 2011-07-27 | Nok株式会社 | accumulator |
DE102007036487A1 (en) | 2007-08-01 | 2009-02-05 | Hydac Technology Gmbh | Guide device for a metal bellows |
JP5116153B2 (en) * | 2008-03-20 | 2013-01-09 | Nok株式会社 | Bellows type accumulator |
DE102009060852A1 (en) * | 2009-12-30 | 2011-07-07 | HYDAC Technology GmbH, 66280 | Hydraulic accumulator, in particular pulsation damper |
-
2009
- 2009-12-30 JP JP2012546363A patent/JP5711264B2/en active Active
- 2009-12-30 WO PCT/EP2009/009330 patent/WO2011079851A1/en active Application Filing
- 2009-12-30 US US13/261,282 patent/US8844575B2/en active Active
- 2009-12-30 EP EP09801177.8A patent/EP2519747B1/en active Active
Non-Patent Citations (1)
Title |
---|
See references of WO2011079851A1 * |
Also Published As
Publication number | Publication date |
---|---|
WO2011079851A1 (en) | 2011-07-07 |
US20120211111A1 (en) | 2012-08-23 |
EP2519747B1 (en) | 2013-10-09 |
JP2013516580A (en) | 2013-05-13 |
US8844575B2 (en) | 2014-09-30 |
JP5711264B2 (en) | 2015-04-30 |
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