EP3289227A1 - Hydrospeicher - Google Patents
HydrospeicherInfo
- Publication number
- EP3289227A1 EP3289227A1 EP16716005.0A EP16716005A EP3289227A1 EP 3289227 A1 EP3289227 A1 EP 3289227A1 EP 16716005 A EP16716005 A EP 16716005A EP 3289227 A1 EP3289227 A1 EP 3289227A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- hydraulic accumulator
- accumulator according
- guide
- trough
- 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
- 238000003860 storage Methods 0.000 claims abstract description 23
- 239000012530 fluid Substances 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 9
- 238000007789 sealing Methods 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 5
- 239000000956 alloy Substances 0.000 claims description 5
- 238000005096 rolling process Methods 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000002184 metal Substances 0.000 claims description 3
- 230000002093 peripheral effect Effects 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 230000004323 axial length Effects 0.000 claims description 2
- 239000004033 plastic Substances 0.000 claims description 2
- 229920003023 plastic Polymers 0.000 claims description 2
- 238000006073 displacement reaction Methods 0.000 claims 1
- 239000007789 gas Substances 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 5
- 230000002349 favourable effect Effects 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 239000007769 metal material Substances 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 2
- 239000002131 composite material Substances 0.000 description 2
- 239000010720 hydraulic oil Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000013016 damping Methods 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000009499 grossing Methods 0.000 description 1
- 239000002650 laminated plastic Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 230000010349 pulsation Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004381 surface treatment Methods 0.000 description 1
- 238000003856 thermoforming 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
- F15B1/24—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
- F15B2201/30—Accumulator separating means
- F15B2201/31—Accumulator separating means having 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
- F15B2201/40—Constructional details of accumulators not otherwise provided for
-
- 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
-
- 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
- F15B2201/60—Assembling or methods for making accumulators
- F15B2201/605—Assembling or methods for making housings therefor
-
- 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
- F15B2201/60—Assembling or methods for making accumulators
- F15B2201/61—Assembling or methods for making separating means therefor
Definitions
- the invention relates to a hydraulic accumulator, in particular piston accumulator, in which a piston part separates two media spaces within a storage housing from each other.
- Hydraulic accumulators of this type (DE 103 10 427 A1), in which the piston part in particular separates a space with a working gas, such as nitrogen, from a space with a working fluid, such as hydraulic oil, are known and marketed in a variety of sizes and embodiments available. They are widely used in hydraulic systems of various kinds, for example for the storage of hydraulic energy, for damping or smoothing pressure fluctuations or the like.
- storage devices in the form of piston accumulators are also used in hydraulic systems in working equipment having hydraulic drive units, for example in mobile working machines, such as excavators, stackers, loaders or mobile cranes.
- the invention is based on the object of providing a hydraulic accumulator of the type mentioned in the introduction put, which is particularly efficient and inexpensive to produce and is also characterized by a particularly favorable performance.
- a significant feature of the invention is that the piston part is formed as a deep-drawn part. With little effort to cost of material can thereby produce the piston part rationally and with low cost.
- the design as a deep-drawn part also leads to a relatively low piston weight and thus because of the low inertia to a favorable operating behavior.
- the piston part can be subdivided into a guide part and a dome-like part which serves to increase the gas working space on the gas side of the reservoir, wherein a pressure-balanced separation surface between the two media spaces is formed by the trough part during operation of the reservoir.
- this design is advantageously a particularly large proportion of the total volume of the storage enclosure available as a gas volume.
- the piston member may be provided on the outer peripheral side with continuous circumferential, groove-like depressions for receiving sealing and guiding tapes.
- the respective groove-like depressions can be obtained in a particularly advantageous and rational manner by a rolling process, which can be carried out in a particularly efficient manner as an additional forming step in conjunction with deep drawing.
- the arrangement may be made such that one of the groove-like recesses for receiving the guide strip is disposed at a free end portion of the piston member within the guide member, wherein a further second groove-like depression serves to receive the sealing tape and in the region of the transition between the guide and the trough part is arranged either on the guide or on the trough part. Due to the axial distance between the guide and sealing strip thereby a particularly favorable, non-tilting guidance of the piston part is ensured.
- the wall thickness of the piston part designed as a hollow piston is advantageously substantially the same over its axial extent.
- the length of the cylindrical guide part is preferably equal to or greater than half the diameter of this guide part.
- the piston part can be formed from a fine grain metal sheet, in particular from a stainless steel material or an AlMg alloy, or from another metallic material suitable for a deep drawing process.
- the piston part can be guided in a hollow tube within the storage housing in each of its possible travel positions.
- the storage housing can be rational and manufactured at low cost, because no consuming internal machining for a direct guidance of the piston part is required on the housing inner wall.
- An additional advantage is that one identical unit, consisting of hollow tube and associated piston part, for different storage enclosure sizes can be used, whereby for the production of different sized hydraulic accumulator a modular design can be realized, which allows a particularly efficient production with low cost.
- the storage housing must not be made of a metallic, good sliding properties for the piston part bidding material, but that also composite materials, such as in the form of carbon fiber reinforced plastic materials, come into question, which makes the production particularly lightweight Hydro Items allows cost-effective manner.
- FIG. 1 and 2 are longitudinal sections of a sheet-metal deep-drawn part, wherein in Figure 1, the preform formed by drawing and shown in Figure 2, the finished shape of the piston part of the hydraulic accumulator according to the invention.
- Fig. 3 shows a relation to a practical embodiment of the
- FIG. 3 in the form of a piston accumulator has a storage housing 1 with a circular cylindrical housing.
- Main part 3 a housing cover part 5 and a bottom part 7 on.
- the housing main part 3 and the bottom part 7 form a pot, which is closed except for a storage longitudinal axis 9 coaxially located gas filling port 1 1.
- Housing main part 3 and bottom part 7 are integrally formed, for example in the form of a deep-drawn part of metallic material, wherein the bottom part 7 has an outwardly convex curvature.
- a design pressure of! 5 bar and a gas volume of 20 liters designed embodiment of FIG. 1 is provided as suitable for thermoforming material for housing main body 3 and bottom part 7 an AlMg alloy, with a wall thickness of the main part 3 of 3.3 mm.
- the storage housing can also be constructed differently, for example in the form of a so-called liner, which is at least partially wound from plastic laminate materials.
- the housing cover part 5 has the shape of a shell with concave inner side 13 and, as a closure part of the housing 1, connected by means of a crimp 15 with the opening edge, wherein an O-ring 1 7 in a formed on the edge of the cover part 5 Ring groove 19 forms the seal.
- a fluid connection 21 for a relevant working fluid such as hydraulic oil, is provided on the cover part 5.
- Connection fittings on the fluid connection 21 as well as on the filling connection 1 1 are formed according to the prior art.
- a piston part 27 is guided axially freely movable in the housing main part 3.
- This piston part 27 is formed by a one-piece deep-drawn part, wherein a suitable for deep-drawing process fine grain plate is provided, for example, an AlMg alloy or a stainless steel material.
- FIG. 1 shows the preform 26 formed after deep drawing, from which the finished piston part 27 shown in FIG. 2 passes Rolling is formed. As shown in FIGS.
- the piston member 27 has a cup-shaped or pot-like shape with an axially along the inside of the housing main part 3 extending guide member 29, at its end facing the cover part 5, a trough part 31 connects, which is dome-shaped ,
- the curvature of the trough part 31 is adapted to the concave curvature of the inner side 13 of the cover part 5, so that the piston part 27 at its upper end position, ie in the absence of fluid pressure in the fluid working space 25, the entire surface rests against the inner side 13.
- the storage housing 1 is free of residual volume of remaining fluid at this end position.
- the separating surface 33 formed by the trough part 31 between the gas working chamber 23 and fluid working chamber 25 is pressure balanced.
- the trough part 31, as well as the guide member 29 may therefore be formed with a smaller thickness, so that the piston member 27 is a deep-drawn part with low construction weight and the correspondingly low inertia leads to a favorable operating behavior, for example when used as a pulsation damper.
- the piston part 27 is provided on the outer peripheral side with continuous circumferential recessed grooves 35 and 37. These grooves 35, 37 are each formed by rolling the preform.
- the groove 35 located on top in the figure is located at the transition between the guide part 29 and the trough part 31 and forms the seat for a sealing ring 39.
- the other groove 37 provided at the lower end of the guide part 29 accommodates a further sealing element in the form of a guide strip 41 ,
- the axial length of the cylindrical guide part 29 is at least half the diameter of the guide
- the hydraulic accumulator of the second embodiment of Fig. 4 is provided for a higher pressure level, for example, for a design pressure of 350 bar. Accordingly, the storage case 1 is formed with the main part 3 and cover part 5 made of a suitable stainless steel.
- a running tube 47 is provided which extends concentrically in the housing main part 3 to the axis 9.
- the running tube 47 is in a small wall thickness, for example, 2 mm, of a metallic material, such as an AlMg alloy, formed and fixed at the top in the figure on the lid part 5.
- the end edge of the cover part 5 on the inside forms a seat for the running tube 47 with a tolerance sleeve 49 and an O-ring seal 51.
- the running tube 47 held at a distance from the inside of the main part 3 is at its lower end by means of a preferably made of plastic retaining ring 53 with passages (not shown) supported on the housing main body 3, without a seal would be formed.
- the intermediate space 55 between the barrel 47 and the housing main part 3 is thus part of the gas working space 23.
- the embodiment of Fig. 5 also relates to a piston accumulator for a higher pressure level, for example, a design pressure of 350 bar.
- a higher pressure level for example, a design pressure of 350 bar.
- the housing main body 3 is made thin-walled.
- the main part 3 is a deep-drawn part with a wall thickness in the circular cylindrical longitudinal section of 5 mm, wherein only the bottom part 7 and the connection with the cover part 5 forming end portion 57 have a greater wall thickness.
- the main part 3 is surrounded by a cylindrical jacket 59. This is made of a high-strength composite material, for example of a carbon fiber reinforced plastic material.
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 |
---|---|---|---|
DE102015005395.7A DE102015005395A1 (de) | 2015-04-28 | 2015-04-28 | Hydrospeicher |
PCT/EP2016/000603 WO2016173697A1 (de) | 2015-04-28 | 2016-04-13 | Hydrospeicher |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3289227A1 true EP3289227A1 (de) | 2018-03-07 |
EP3289227B1 EP3289227B1 (de) | 2021-09-29 |
Family
ID=55750370
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP16716005.0A Active EP3289227B1 (de) | 2015-04-28 | 2016-04-13 | Hydrospeicher |
Country Status (6)
Country | Link |
---|---|
US (1) | US20180112681A1 (de) |
EP (1) | EP3289227B1 (de) |
JP (1) | JP6820276B2 (de) |
CN (1) | CN107532616A (de) |
DE (1) | DE102015005395A1 (de) |
WO (1) | WO2016173697A1 (de) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102018007279A1 (de) * | 2018-09-14 | 2020-03-19 | Hydac Technology Gmbh | Balgspeicher |
EP3977822A4 (de) * | 2019-05-24 | 2023-02-01 | Thermo Kevex X-Ray Inc. | Druckregler für röntgengerät |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2417873A (en) * | 1944-05-12 | 1947-03-25 | New York Air Brake Co | Accumulator |
US2829672A (en) * | 1955-03-23 | 1958-04-08 | Superior Pipe Specialties Co | Accumulator |
FR1299239A (fr) * | 1961-08-28 | 1962-07-20 | Greer Hydraulics Inc | Accumulateur à piston à coque fermée à une extrémité |
JPS4119722Y1 (de) * | 1964-07-27 | 1966-09-16 | ||
DE3728555A1 (de) * | 1987-08-27 | 1989-03-09 | Kloeckner Humboldt Deutz Ag | Kolbendruckspeicher fuer hydraulikoel |
JPH0211203U (de) * | 1988-07-06 | 1990-01-24 | ||
DE19651842A1 (de) * | 1996-12-13 | 1998-06-18 | Bosch Gmbh Robert | Medientrenneinrichtung, insbesondere für hydraulische Bremsanlagen von Fahrzeugen |
BR0012464B1 (pt) * | 1999-07-02 | 2009-01-13 | Êmbolo para um compartimento de pressço hidrÁulico. | |
DE10310427A1 (de) | 2003-03-11 | 2004-09-30 | Hydac Technology Gmbh | Hydrospeicher |
JP4550402B2 (ja) * | 2003-12-02 | 2010-09-22 | 日本発條株式会社 | アキュムレータおよびアキュムレータの製造方法 |
DE102005015262A1 (de) * | 2005-04-04 | 2006-10-05 | Robert Bosch Gmbh | Druckmittelspeicher, Speichereinheit aus mehreren Druckmittelspeichern und Verfahren zur Herstellung eines Druckmittelspeichers |
CN201661637U (zh) * | 2010-04-28 | 2010-12-01 | 浙江万向系统有限公司 | 带有防泡沫装置的减震器 |
CN201723513U (zh) * | 2010-05-24 | 2011-01-26 | 浙江万向精工有限公司 | 一种改进的蓄能器 |
DE102010062267A1 (de) * | 2010-12-01 | 2012-06-06 | Robert Bosch Gmbh | Hydroaggregat einer hydraulischen Fahrzeugbremsanlage |
US20120273076A1 (en) * | 2011-04-28 | 2012-11-01 | Robert Bosch Gmbh | Compact hydraulic accumulator |
CN203570708U (zh) * | 2013-10-29 | 2014-04-30 | 北京精密机电控制设备研究所 | 一种内表面强化钛合金液压活塞式蓄能器 |
DE102014000380A1 (de) | 2014-01-14 | 2015-07-16 | Hydac Technology Gmbh | Speichereinrichtung |
-
2015
- 2015-04-28 DE DE102015005395.7A patent/DE102015005395A1/de not_active Withdrawn
-
2016
- 2016-04-13 US US15/569,849 patent/US20180112681A1/en not_active Abandoned
- 2016-04-13 JP JP2017556936A patent/JP6820276B2/ja active Active
- 2016-04-13 CN CN201680024446.5A patent/CN107532616A/zh active Pending
- 2016-04-13 EP EP16716005.0A patent/EP3289227B1/de active Active
- 2016-04-13 WO PCT/EP2016/000603 patent/WO2016173697A1/de active Application Filing
Also Published As
Publication number | Publication date |
---|---|
JP6820276B2 (ja) | 2021-01-27 |
WO2016173697A1 (de) | 2016-11-03 |
EP3289227B1 (de) | 2021-09-29 |
DE102015005395A1 (de) | 2016-11-03 |
JP2018514719A (ja) | 2018-06-07 |
CN107532616A (zh) | 2018-01-02 |
US20180112681A1 (en) | 2018-04-26 |
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