GB2039616A - An elastic partition wall for pressure vessels - Google Patents

An elastic partition wall for pressure vessels Download PDF

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Publication number
GB2039616A
GB2039616A GB7938908A GB7938908A GB2039616A GB 2039616 A GB2039616 A GB 2039616A GB 7938908 A GB7938908 A GB 7938908A GB 7938908 A GB7938908 A GB 7938908A GB 2039616 A GB2039616 A GB 2039616A
Authority
GB
United Kingdom
Prior art keywords
partition wall
gas
elastic
liquid
wall
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
Application number
GB7938908A
Other versions
GB2039616B (en
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Robert Bosch GmbH filed Critical Robert Bosch GmbH
Publication of GB2039616A publication Critical patent/GB2039616A/en
Application granted granted Critical
Publication of GB2039616B publication Critical patent/GB2039616B/en
Expired legal-status Critical Current

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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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16J—PISTONS; CYLINDERS; SEALINGS
    • F16J3/00—Diaphragms; Bellows; Bellows pistons
    • F16J3/02—Diaphragms
    • 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
    • F15B2201/3151—Accumulator separating means having flexible separating means the flexible separating means being diaphragms or membranes
    • 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
    • F15B2201/60—Assembling or methods for making accumulators
    • F15B2201/61—Assembling or methods for making separating means therefor
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/16—Mechanical energy storage, e.g. flywheels or pressurised fluids

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Separation Using Semi-Permeable Membranes (AREA)

Abstract

This invention relates to an elastic partition wall for pressure vessels or pressure accumulators which are used in hydraulic installations for storing pressure energy. The elastic partition wall 10 sub-divides the pressure vessel into a gas space 14 and a liquid space 13 and has a high ability to resist the liquid. Furthermore, the gas permeability of the partition wall is made as low as possible. This is achieved in accordance with the invention, by means of dome-like thickened portions 15, for example, which increase the average thickness of the partition wall, without negatively influencing its deformability. <IMAGE>

Description

SPECIFICATION An elastic partition wall for pressure vessels State of the art The invention originates from an elastic partition wall according to the type set forth in the main claim.
With one such known partition wall the means opposed to gas diffusion consist of an additional gas impermeable partition wall of non-expansible material which is arranged inside the elastic partition wall. That has the disadvantage that when the elastic partition wall is compressed by the stored liquid, the non-expansible partition wall lies within the elastic partition wall in a kinked and folded condition. In that manner, it ca be damaged or destroyed.
With one other known partition wall a gas impermeable additional foil-like partition wall is also provided which is of the same size as the elastic partition wall. Such an arrangement is only suitable for partition walls of very small pressure vessels, and it has moreover the disadvantage that the side of the partition wall facing the liquid is sensitive with respect to the said liquid and that due to the loose arrangement of the two partition walls gas cushions can form between them which can lead to breakdowns.
Advantages ofthe invention As opposed to this, the elastic partition wall in accordance with the invention comprising the characterising features of the main claim has the advantage that it is very reliable, that it has a long working life, is simple to assemble and to some extent also cheap to manufacture.
Advantageous further developments and improvements of the features set forth in the main claim are made possible by the measures set forth in the sub-claims. It is of particular advantage when the means consist of uniformly re-occurring and contiguous thickened portions along the entire surface of the partition wall since, in that case, manufacture of the partition wall is particularly simple.
Drawing Three embodiments of the invention are illustrated in the drawing and are described in more detail in the following specification. They show longitudinal sections through an elastic partition wall.
Description ofthe embodiments The partition wall 10 according to the embodiment of Figure 1 consists of an elastic, rubber-like mate rial. It is rigidly clamped at its upper edge 11 in a vessel 12 of rigid material which is only illustrated in chain dotted lines. Such vessels are known and for that reason are not described further. The partition wall 10 sub-divides the said vessel into a liquid space 13 and a gas space 14.
The partition wall is made smooth on its outside whilst on its inside it has, with the exception of the edge 11, a large number of dome-like raised portions 15, each of which is in contiguous contact with its neighbour. These raised portions extend from a basic thickness s which was usual with previous partition walls of this kind. Due to the thickened portions, the amount of gas diffusing from the gas side to the liquid side is less. The thickness of the partition wall could, of course, be increased throughout by the amounts in order to reduce the gas permeability. In that case however, the deformability of the partition wall required in operation would suffer and considerable bending stresses would occur which would reduce the life of the wall.With the proposed solution, the original deformability of the partition wall remains whilst maintaining a simultaneously low gas permeability. The depressions 16 between the domes 15 act as hinges. The transition positions at the domes are rounded in order to avoid a notch effect. Thus, in accordance with the invention, with a previously usual basic wall thickness s, the average wall thickness is increased by the domes 15, whereby less gas can diffuse from the gas side to the oil side. As is known per se, the basic wall thickness s must not be the same size everywhere. The domes 15 can, of course, also be arranged on the outside of the partition wall.
The embodiment according to Figure 2 shows a modification of the embodiment according to Figure 1. The dome-like raised portions are then replaced by annular rib-like raised portions 17 - likewise formed on the inside - all of which abut one another without any intermediate spaces.
In the embodiment according to Figure 3, the same effect is achieved in another way. In this instance, the partition wall - referenced 20 - consists of two layers 21, 22 rigidly connected to one another.
The inner layer 22 consists of a material with a low coefficient of permeability, for example butyl, whereas the layer 21 consists of a material which is resistant to the liquid, for example epichlorohydrine or perbunan. The two layers are preferably rigidly connected to one another by adhesion, vulcanising or the like. This so laminated partition wall is resistant to the liquid used and at the same time is more gas-tight than a partition wall which is manufactured from only the material which is otherwise used durable with respect to the liquid.
1. An elastic partition wall for pressure vessels, especially pressure accumulators, which sub-divides its interior into a gas space and a liquid space and which has means opposed to gas diffusion, characterised in that, the means form an integral compo nentofthe partition wall.
2. A partition wall according to claim 1 characterised in that the means consist of uniformly recurring and contiguous thickened portions over the entire surface of the partiton wall with the exception of the clamping region.
3. A partition wall according to claim 1 or 2 characterised in that the thickened portions are dome-like raised portions on the inside (gas side) of the partition wall.
4. A partition wall according to claim 1 or 2 characterised in that the dome-like thickened portions are formed on the outside of the partition wall.
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (8)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION An elastic partition wall for pressure vessels State of the art The invention originates from an elastic partition wall according to the type set forth in the main claim. With one such known partition wall the means opposed to gas diffusion consist of an additional gas impermeable partition wall of non-expansible material which is arranged inside the elastic partition wall. That has the disadvantage that when the elastic partition wall is compressed by the stored liquid, the non-expansible partition wall lies within the elastic partition wall in a kinked and folded condition. In that manner, it ca be damaged or destroyed. With one other known partition wall a gas impermeable additional foil-like partition wall is also provided which is of the same size as the elastic partition wall. Such an arrangement is only suitable for partition walls of very small pressure vessels, and it has moreover the disadvantage that the side of the partition wall facing the liquid is sensitive with respect to the said liquid and that due to the loose arrangement of the two partition walls gas cushions can form between them which can lead to breakdowns. Advantages ofthe invention As opposed to this, the elastic partition wall in accordance with the invention comprising the characterising features of the main claim has the advantage that it is very reliable, that it has a long working life, is simple to assemble and to some extent also cheap to manufacture. Advantageous further developments and improvements of the features set forth in the main claim are made possible by the measures set forth in the sub-claims. It is of particular advantage when the means consist of uniformly re-occurring and contiguous thickened portions along the entire surface of the partition wall since, in that case, manufacture of the partition wall is particularly simple. Drawing Three embodiments of the invention are illustrated in the drawing and are described in more detail in the following specification. They show longitudinal sections through an elastic partition wall. Description ofthe embodiments The partition wall 10 according to the embodiment of Figure 1 consists of an elastic, rubber-like mate rial. It is rigidly clamped at its upper edge 11 in a vessel 12 of rigid material which is only illustrated in chain dotted lines. Such vessels are known and for that reason are not described further. The partition wall 10 sub-divides the said vessel into a liquid space 13 and a gas space 14. The partition wall is made smooth on its outside whilst on its inside it has, with the exception of the edge 11, a large number of dome-like raised portions 15, each of which is in contiguous contact with its neighbour. These raised portions extend from a basic thickness s which was usual with previous partition walls of this kind. Due to the thickened portions, the amount of gas diffusing from the gas side to the liquid side is less. The thickness of the partition wall could, of course, be increased throughout by the amounts in order to reduce the gas permeability. In that case however, the deformability of the partition wall required in operation would suffer and considerable bending stresses would occur which would reduce the life of the wall.With the proposed solution, the original deformability of the partition wall remains whilst maintaining a simultaneously low gas permeability. The depressions 16 between the domes 15 act as hinges. The transition positions at the domes are rounded in order to avoid a notch effect. Thus, in accordance with the invention, with a previously usual basic wall thickness s, the average wall thickness is increased by the domes 15, whereby less gas can diffuse from the gas side to the oil side. As is known per se, the basic wall thickness s must not be the same size everywhere. The domes 15 can, of course, also be arranged on the outside of the partition wall. The embodiment according to Figure 2 shows a modification of the embodiment according to Figure 1. The dome-like raised portions are then replaced by annular rib-like raised portions 17 - likewise formed on the inside - all of which abut one another without any intermediate spaces. In the embodiment according to Figure 3, the same effect is achieved in another way. In this instance, the partition wall - referenced 20 - consists of two layers 21, 22 rigidly connected to one another. The inner layer 22 consists of a material with a low coefficient of permeability, for example butyl, whereas the layer 21 consists of a material which is resistant to the liquid, for example epichlorohydrine or perbunan. The two layers are preferably rigidly connected to one another by adhesion, vulcanising or the like. This so laminated partition wall is resistant to the liquid used and at the same time is more gas-tight than a partition wall which is manufactured from only the material which is otherwise used durable with respect to the liquid. CLAIMS
1. An elastic partition wall for pressure vessels, especially pressure accumulators, which sub-divides its interior into a gas space and a liquid space and which has means opposed to gas diffusion, characterised in that, the means form an integral compo nentofthe partition wall.
2. A partition wall according to claim 1 characterised in that the means consist of uniformly recurring and contiguous thickened portions over the entire surface of the partiton wall with the exception of the clamping region.
3. A partition wall according to claim 1 or 2 characterised in that the thickened portions are dome-like raised portions on the inside (gas side) of the partition wall.
4. A partition wall according to claim 1 or 2 characterised in that the dome-like thickened portions are formed on the outside of the partition wall.
5. A partition wall according to claim 1 and/or 2 characterised in that the thickened portions are formed as annular ribs
6. A partition wall according to claim 1 characterised in that the means consist of a layer of an elastic material with a high coefficient of permeability on the inside of the partition wall and rigidly connected thereto, whereas the other layer consists of a material resistant to liquid, especially to oil.
7. A partition wall according to claim 1 and 6 characterised in that the two layers are rigidly connected together byvulcanising or adhesion.
8. An elastic partition wall for a pressure vessel substantially as herein described with reference to Figure 1, Figure 2 or Figure 3 of the accompanying drawings.
GB7938908A 1978-12-07 1979-11-09 Elastic partition wall for pressure vessels Expired GB2039616B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19782852912 DE2852912A1 (en) 1978-12-07 1978-12-07 ELASTIC PARTITION FOR PRESSURE TANKS

Publications (2)

Publication Number Publication Date
GB2039616A true GB2039616A (en) 1980-08-13
GB2039616B GB2039616B (en) 1983-03-02

Family

ID=6056557

Family Applications (1)

Application Number Title Priority Date Filing Date
GB7938908A Expired GB2039616B (en) 1978-12-07 1979-11-09 Elastic partition wall for pressure vessels

Country Status (5)

Country Link
JP (1) JPS5578801A (en)
DE (1) DE2852912A1 (en)
FR (1) FR2443622B1 (en)
GB (1) GB2039616B (en)
IT (1) IT1127660B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5036110A (en) * 1988-09-20 1991-07-30 Automobiles Peugeot Impervious resilient membrane and hydropneumatic accumulator fitted with that membrane

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2515761A1 (en) * 1981-10-30 1983-05-06 Milton Roy Dosapro HYDROPNEUMATIC SHOCK ABSORBER
DE3313910A1 (en) * 1983-04-16 1984-10-18 Alfred Teves Gmbh, 6000 Frankfurt Hydropneumatic accumulator
DE3741897A1 (en) * 1987-12-10 1989-06-29 Wolf Woco & Co Franz J Actuator
DE3833653A1 (en) * 1987-12-24 1989-07-06 Integral Hydraulik Co Hydraulic accumulator
FR2628795B1 (en) * 1988-03-18 1993-06-11 Bendix France FLEXIBLE MEMBRANE FOR PRESSURE TANK
JPH0235232A (en) * 1989-06-29 1990-02-05 Nhk Spring Co Ltd Partition film between gas and liquid chamber of pressure vessel
DE3925874A1 (en) * 1989-08-04 1991-02-07 Friedhelm Schneider Membrane gas pressure reservoir for hydraulic lines - has two overlying membranes and cooperating piston rod operating proximity switches
DE8909430U1 (en) * 1989-08-04 1989-10-26 Schneider, Friedhelm, 5226 Reichshof Diaphragm gas pressure accumulator
JPH0367701U (en) * 1989-10-25 1991-07-02
DE4035785C2 (en) * 1990-11-10 1994-09-08 Bosch Gmbh Robert Bladder accumulator
DE10112976A1 (en) 2001-03-17 2002-10-02 Hydac Technology Gmbh Hydropneumatic pressure accumulator
DE102007003724A1 (en) 2007-01-25 2008-07-31 Hydac Technology Gmbh Pressure vessel, in particular hydraulic accumulator
DE102007003723A1 (en) 2007-01-25 2008-07-31 Elringklinger Ag structural component

Family Cites Families (10)

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Publication number Priority date Publication date Assignee Title
US2543585A (en) * 1945-01-13 1951-02-27 Bendix Aviat Corp Accumulator
US2532143A (en) * 1946-04-06 1950-11-28 Jack & Heintz Prec Ind Inc Accumulator
FR1272420A (en) * 1960-11-02 1961-09-22 Olaer Patent Co Composite mobile separator for pressure vessel
DE1600621A1 (en) * 1967-01-26 1970-01-08 Teves Gmbh Alfred Hydropneumatic pressure accumulator with a two-part pressure-resistant housing
DE1675349A1 (en) * 1968-02-03 1971-01-21 Langen & Co Hydraulic accumulator
JPS49112060A (en) * 1973-02-12 1974-10-25
US3948288A (en) * 1974-12-13 1976-04-06 Gardner-Denver Company Hydraulic accumulator
DE2522380A1 (en) * 1975-05-21 1976-12-02 Teves Gmbh Alfred Pressure accumulator with membrane divided container - has double dividing wall with interspace filled with fluid
FR2319037A1 (en) * 1975-07-25 1977-02-18 Bosch Gmbh Robert Hydropneumatic accumulator with two part body - has elastic partition diaphragm gripped between bead on one body half and ring on other half
DE2620230A1 (en) * 1976-05-07 1977-11-17 Karlsruhe Augsburg Iweka DEVICE FOR REGULATING THE TEMPERATURE OF A MEDIUM

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5036110A (en) * 1988-09-20 1991-07-30 Automobiles Peugeot Impervious resilient membrane and hydropneumatic accumulator fitted with that membrane

Also Published As

Publication number Publication date
FR2443622A1 (en) 1980-07-04
GB2039616B (en) 1983-03-02
DE2852912A1 (en) 1980-06-26
IT1127660B (en) 1986-05-21
JPS5578801A (en) 1980-06-13
FR2443622B1 (en) 1985-10-31
IT7927677A0 (en) 1979-11-29

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PCNP Patent ceased through non-payment of renewal fee