NO163031B - FLOTTOERAKKUMULATOR. - Google Patents
FLOTTOERAKKUMULATOR. Download PDFInfo
- Publication number
- NO163031B NO163031B NO874286A NO874286A NO163031B NO 163031 B NO163031 B NO 163031B NO 874286 A NO874286 A NO 874286A NO 874286 A NO874286 A NO 874286A NO 163031 B NO163031 B NO 163031B
- Authority
- NO
- Norway
- Prior art keywords
- float
- liquid
- gas
- accumulator
- pressure
- Prior art date
Links
- 239000007788 liquid Substances 0.000 claims description 35
- 239000006260 foam Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000004033 plastic Substances 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- QXJJQWWVWRCVQT-UHFFFAOYSA-K calcium;sodium;phosphate Chemical compound [Na+].[Ca+2].[O-]P([O-])([O-])=O QXJJQWWVWRCVQT-UHFFFAOYSA-K 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000004005 microsphere Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 239000000126 substance 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
- F15B1/24—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
- F15B2201/30—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
- F15B2201/41—Liquid ports
- F15B2201/411—Liquid ports having valve 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
- F15B2201/40—Constructional details of accumulators not otherwise provided for
- F15B2201/415—Gas ports
- F15B2201/4155—Gas ports having valve means
-
- 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)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
- Jet Pumps And Other Pumps (AREA)
- Signal Processing For Digital Recording And Reproducing (AREA)
- Degasification And Air Bubble Elimination (AREA)
Description
Den foreliggende oppfinnelse vedrører en hydropneumatisk akkumulator,fortrinnsvis til bruk for energilagring i forbindelse med et hydraulisk system som skal motta resp. av- The present invention relates to a hydropneumatic accumulator, preferably for use for energy storage in connection with a hydraulic system which is to receive resp. of-
gi store mengder bruksfluidum i løpet av kort tid .Den kan også benyttes til f.eks.demping av væskeslag i rør ,som en reserve kraftkilde for å opprettholde trykk eller manipul- provide large quantities of working fluid in a short time. It can also be used for e.g. damping of liquid impact in pipes, as a reserve power source to maintain pressure or manipulate
ere ventiler i et system hvis den normale kraftforsyning svikter ,sammen med hydrauliske sylindere som et fjærende element eller motvekt ,m.m. are valves in a system if the normal power supply fails, together with hydraulic cylinders as a resilient element or counterweight, etc.
En hydropneumatisk akkumulator består i hovedsak av en beholder som er fyllt med komprimert gass og koblet til et system som inneholder en væske .Ved oppladning av akkumulatoren pumpes væske inn i beholderen slik at gassen blir komprimert ytterligere.Når akkumulatoren skal avgi energi senkes systemtrykket slik at gassen ekspaderer og trykker væske tilbake til systemet . A hydropneumatic accumulator mainly consists of a container that is filled with compressed gas and connected to a system containing a liquid. When charging the accumulator, liquid is pumped into the container so that the gas is further compressed. When the accumulator is to release energy, the system pressure is lowered so that the gas expands and pushes liquid back into the system.
Gassen og væsken holdes vanligvis adskilt ved hjelp av The gas and liquid are usually kept separate by means of
et stempel ,en gummiblære .eller en fritt flytende flottør. a piston, a rubber bladder or a free-floating float.
De forskjellige akkumulatortyper betegnes ut fra hvordan The different accumulator types are designated based on how
denne adskillelsen finner sted . F.eks. stempelakkumulator, blæreakkumulator ,flottørakkumulator ,o.s.v. Vidre inneholder akkumulatorene vanligvis en annordning som hindrer gassen i å trenge ut i systemet hvis systemtrykket er lavere enn fylletrykket for den komprimerte gassen slik at akkumulatoren tømmes helt for væske .1 en stempelakkumulator hindres dette av de radielle tettningene mellom stemplet og sylinderen.I en blæreakkumulator hindres det av en fjærbelastet ventil i utløpet som lukkes ved åt gummi-blæren presser den igjen når akkumulatoren tømmes for væske. this separation takes place. E.g. piston accumulator, bladder accumulator, float accumulator, etc. Furthermore, the accumulators usually contain a device that prevents the gas from penetrating into the system if the system pressure is lower than the filling pressure of the compressed gas so that the accumulator is completely emptied of liquid. 1 a piston accumulator this is prevented by the radial seals between the piston and the cylinder. In a bladder accumulator if it is prevented by a spring-loaded valve in the outlet that closes at the rubber bladder, it presses again when the accumulator is emptied of liquid.
I en flottørakkumulator virker vanligvis flottøren som en ventil som stenger utløpet når akkumulatoren er tom for væske. Stempelakkumulatoren og blæreakkumulatoren er de mest anvendte typene ,og er beskrevet i alle lærebøker om hydraulikk. In a float accumulator, the float usually acts as a valve that closes the outlet when the accumulator is empty of liquid. The piston accumulator and bladder accumulator are the most used types, and are described in all textbooks on hydraulics.
Den foreliggende oppfinnelse sorterer imidlertid under kategori flottørakkumulatorer og består av en sylindrisk mantel (1) som er lukket i den øvre enden av et endelokk (2) som inneholder en påfyllingsventil (3) for gass .1 den nedre enden er mantelen lukket av et endelokk (4) som inneholder en boring (a) som står i forbindelse med et hydraulisk system .Pos. 1,2,4 danner således en beholder som inneholder en flottør (5) som flyter fritt i væsken og tjener til å skille væsken fra gassen.Gassen og væsken får kun kontakt med hverandre i et smalt ringareal (b) rundt flottøren (5).Akkumulatoren vil således på oversiden av flottøren (5) ha en ansamling gass som har et trykk som er avhengig av væskenivået og følgelig flottørens posisjon. The present invention, however, falls under the category of float accumulators and consists of a cylindrical shell (1) which is closed at the upper end by an end cap (2) which contains a filling valve (3) for gas.1 the lower end, the shell is closed by an end cap (4) which contains a bore (a) which is in connection with a hydraulic system .Pos. 1,2,4 thus form a container containing a float (5) which floats freely in the liquid and serves to separate the liquid from the gas. The gas and liquid only come into contact with each other in a narrow ring area (b) around the float (5) .The accumulator will thus have an accumulation of gas on the upper side of the float (5) which has a pressure which is dependent on the liquid level and consequently the position of the float.
Den komprimerte gassen blir ytterligere komprimert når væske blir pumpet inn gjennom boringen (a) i det nedre endelokket (4).Når det hydrauliske systemet som er til-koblet akkumulatoren via boringen (a) krever et stort kvantum væske ,vil trykket i systemet og følgelig i væsken under flottøren (5) bli senket slik at gassen over flottøren (5) ekspanderer og samtidig presser væske ut gjennom boringen (a) . The compressed gas is further compressed when liquid is pumped in through the bore (a) in the lower end cap (4). When the hydraulic system which is connected to the accumulator via the bore (a) requires a large quantity of liquid, the pressure in the system and consequently in the liquid below the float (5) be lowered so that the gas above the float (5) expands and at the same time pushes liquid out through the bore (a) .
I det nedre endelokket (4) er det anbrakt en tettningsring (6) som kommer til anlegg mot flottørens (5) bund når flottøren (5) befinner seg i sin nedre stilling .Tettnings-ringen (6) inngår således i et endeventilsystem som ikke krever bevegelige deler.Tettningen (6) hindrer lekkasje av gass ut i det hydrauliske systemet når væsketrykket er lavere enn gassfyllihgstrykket og flottøren (5) derfor befinner seg i bunnstillingen. D.v.s. når akkumulatoren er tom for væske. A sealing ring (6) is placed in the lower end cap (4) which comes into contact with the bottom of the float (5) when the float (5) is in its lower position. The sealing ring (6) is thus part of an end valve system which does not requires moving parts. The seal (6) prevents leakage of gas into the hydraulic system when the liquid pressure is lower than the gas filling pressure and the float (5) is therefore in the bottom position. I.e. when the accumulator is empty of liquid.
For at akkumulatorer av flottørtypen skal kunne virke til-fredstillende under forskjellige driftsforhold må følgende kriterier være oppfylt: 1. Flottøren må stenge utløpet i bunden av akkumulatoren når systemtrykket er lavere enn gassfyllingstrykket. 2. Flottøren må tåle et høyt driftstrykk (F.eks. 50-300bar) og likevel være lett nok til å flyte i den aktuelle væsken. 3. Flottøren må hindre at gassen absorberes av væsken og derved forsvinner ut av akkumulatoren innblandet væsken. In order for accumulators of the float type to work satisfactorily under different operating conditions, the following criteria must be met: 1. The float must close the outlet at the bottom of the accumulator when the system pressure is lower than the gas filling pressure. 2. The float must withstand a high operating pressure (e.g. 50-300bar) and still be light enough to float in the liquid in question. 3. The float must prevent the gas from being absorbed by the liquid and thereby disappearing out of the accumulator mixed with the liquid.
Pkt. 1 er oppfylt for den foreliggende oppfinnelse ved den ovenfor beskrevne tettningsring (6).Følgende hensyn er tatt ved utformingen av flottøren (5) for å oppnå betingelsene i pkt. 2 og 3: Flottøren (5) er relativ lang i aksiell utstrekning og er nederst forsynt med en styring (7) som har en meget liten klaring (c) til mantelen (l).Vidre er flottøren (5) utstyrt med en tilsvarende styring (8) øverst som også har en liten klaring (d) til mantelen (1).Mellom de to styringene (7,8) dannes et ringformet rom (e) mellom flottøren (5) og mantelen (1). Gassen og væsken får kontakt i ringarealet (b) Point 1 is fulfilled for the present invention by the sealing ring (6) described above. The following considerations have been taken in the design of the float (5) in order to achieve the conditions in points 2 and 3: The float (5) is relatively long in axial extent and is provided at the bottom with a guide (7) which has a very small clearance (c) to the mantle (l). Furthermore, the float (5) is equipped with a corresponding guide (8) at the top which also has a small clearance (d) to the mantle (1). Between the two guides (7,8) an annular space (e) is formed between the float (5) and the mantle (1). The gas and liquid come into contact in the ring area (b)
og væsken som befinner seg i rommet (e) må nødvendigvis bli gassinnblandet. P.g.a. den lille klaringen (c) ved styringen (7) vil imidlertid væskenivået i rommet (e) and the liquid in the space (e) must necessarily be mixed with gas. Because of. the small clearance (c) at the control (7) will, however, the liquid level in the compartment (e)
forbli ganske konstant selv ved akselrert og retardert bevegelse av flottøren (5) ,og den gassinnblandete væsken i rommet (e) vil i svært liten grad bli utskiftet med væsken som befinner seg under flottøren (5). remain fairly constant even during accelerated and decelerated movement of the float (5), and the gas-mixed liquid in space (e) will be exchanged to a very small extent with the liquid located below the float (5).
Flottørens (5) lange aksielle utstrekning gir en god The long axial extent of the float (5) provides a good
styring som sikrer at flottøren (5) kan beveges aksiellt nærmest friksjonsfritt samtidig som man sikrer at at væske ikke trenger opp på oversiden av flottøren (5) eller gass ned under flottøren (5) selv ved meget hurtig akselrert eller retardert bevegelse av flottøren (5).Av denne grunn er også flottørens (5) vekt tilpasset slik at den flyter ca halvt neddykket i væsken. control which ensures that the float (5) can be moved axially almost friction-free while ensuring that liquid does not seep up on the upper side of the float (5) or gas down under the float (5) even during very fast accelerated or decelerated movement of the float (5 ).For this reason, the weight of the float (5) is also adapted so that it floats approximately half submerged in the liquid.
For å oppnå at flottøren (5) blir så lett at den flyter tilnærmet halvt neddykket i væsken (F.eks.olje) ,og sam- To achieve that the float (5) becomes so light that it floats approximately half submerged in the liquid (E.g. oil), and together
tidig tåler et høyt utvendig trykk (F.eks. 50-300 bar), early withstands a high external pressure (e.g. 50-300 bar),
er flottøren tilvirket av plast med en kjerne (10) i syntaktisk skum omgitt av et tett skall (9). the float is made of plastic with a core (10) in syntactic foam surrounded by a dense shell (9).
Syntaktisk skum er velkjent som oppdriftmiddel i forbindelse med undervannsinstallasjoner ,men er alene lite egnet for å opptre i gass under trykk .Gasstrykket diffunderer inn i skummet over tid og sprenger skummet istykker innenifra når det utvendige trykket avlastes . Syntactic foam is well known as a buoyancy agent in connection with underwater installations, but alone is not suitable for acting in gas under pressure. The gas pressure diffuses into the foam over time and bursts the foam to pieces from the inside when the external pressure is relieved.
Kjernen (10) er derfor helt omgitt av et tett skall (9) i et plastmateriale som er diffusjonstett overfor gass ,og som forøvrig har gode mekaniske egenskaper i et vidt temperatur-område samt kjemisk motstandskraft mot den aktuelle væske. The core (10) is therefore completely surrounded by a dense shell (9) in a plastic material which is diffusion-proof to gas, and which otherwise has good mechanical properties in a wide temperature range as well as chemical resistance to the liquid in question.
(F.eks. POM ).Som tilsetting til basismaterialet i det syn-taktiske skummet som utgjør kjernen (10) benyttes mikrokuler i et materiale som forbedrer elastisitetsmodulen og varme-utvidelseskoeffesienten vesentlig (F.eks. glasskuler). Dette er avgjørende for at klaringene (c og d ) mellom styringene ( 7 og 8 ) og mantelen (1) kan gjøres små og forbli små under forskjellige trykk og temperatur forhold .Dette er igjen nød-vendig for at separeringen av gass og væske skal være til-fredstillende .Vedheften mellom kjernen (10) og skallet (9) må videre være god slik at det ikke oppstår spalt mellom dem p.g.a. forskjellig varmeutvidelse. (E.g. POM). As an addition to the base material in the syntactic foam that forms the core (10), microspheres are used in a material that significantly improves the elasticity modulus and thermal expansion coefficient (E.g. glass spheres). This is crucial so that the clearances (c and d) between the guides (7 and 8) and the mantle (1) can be made small and remain small under different pressure and temperature conditions. This is again necessary for the separation of gas and liquid to be satisfactory. The adhesion between the core (10) and the shell (9) must also be good so that there is no gap between them due to different thermal expansion.
Man kan sammenlikne den foreliggende oppfinnelse med tidligere patentskriv som omfatter akkumulatorer og lik-nende innretninger som inneholder en flottør i form av en tett beholder. F.eks. DE3143890A1, US 1.959.640 ,US 2.317.796, Dette er innretninger som er beregnet på et langt lavere arbeidstrykk og tilvirket av materialer som var kjent på den tiden ville ikke flottørene kunne tåle det arbeidstrykk som er aktuelt for akkumulatoren som omfattes av denne søk-nad .Eventuellt ville flottørene bli for tunge til å kunne flyte halvt neddykket i f.eks. olje.Noen av de tidligere beskrevne innretninger har dessuten en flottørutforming som gir en dårlig separering av gass og væske.Likledes har noen en mangelfull endeventil for å hindre gass i å trenge ut i det hydrauliske systemet når akkumulatoren er tom for væske. One can compare the present invention with previous patent documents which include accumulators and similar devices which contain a float in the form of a sealed container. E.g. DE3143890A1, US 1,959,640 , US 2,317,796, These are devices that are designed for a much lower working pressure and made of materials that were known at the time, the floats would not be able to withstand the working pressure applicable to the accumulator covered by this search -nad .Possibly the floats would be too heavy to be able to float half submerged in e.g. oil. Some of the previously described devices also have a float design that results in a poor separation of gas and liquid. Similarly, some have a defective end valve to prevent gas from entering the hydraulic system when the accumulator is empty of liquid.
Claims (1)
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO874286A NO163031C (en) | 1987-10-14 | 1987-10-14 | FLOTTOERAKKUMULATOR. |
PCT/NO1988/000078 WO1989003483A1 (en) | 1987-10-14 | 1988-10-13 | Float accumulator |
SE9001325A SE464658B (en) | 1987-10-14 | 1990-04-11 | Float accumulator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO874286A NO163031C (en) | 1987-10-14 | 1987-10-14 | FLOTTOERAKKUMULATOR. |
Publications (4)
Publication Number | Publication Date |
---|---|
NO874286D0 NO874286D0 (en) | 1987-10-14 |
NO874286L NO874286L (en) | 1989-04-17 |
NO163031B true NO163031B (en) | 1989-12-11 |
NO163031C NO163031C (en) | 1990-03-21 |
Family
ID=19890302
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO874286A NO163031C (en) | 1987-10-14 | 1987-10-14 | FLOTTOERAKKUMULATOR. |
Country Status (3)
Country | Link |
---|---|
NO (1) | NO163031C (en) |
SE (1) | SE464658B (en) |
WO (1) | WO1989003483A1 (en) |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19739015C1 (en) * | 1997-09-06 | 1998-08-06 | Hydac Technology Gmbh | Low pressure storage vessel |
DE10052665B4 (en) * | 2000-10-24 | 2007-02-01 | Zf Sachs Ag | Piston accumulator for a pressure medium actuator |
US8205610B2 (en) | 2005-06-29 | 2012-06-26 | Maquet Critical Care Ab | Diffusion barrier in a delivery apparatus for pressurized medical liquids |
TW200918762A (en) * | 2008-11-03 | 2009-05-01 | Wen-Rui Zheng | Float type accumulator |
IT201700055381A1 (en) * | 2017-05-22 | 2018-11-22 | Zilmet S P A | COMPACT EXPANSION VESSEL |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2817361A (en) * | 1953-02-10 | 1957-12-24 | Mercier Jean | Piston accumulator |
NO152382C (en) * | 1983-06-06 | 1985-09-18 | Myrens Verksted As | fluid accumulator |
-
1987
- 1987-10-14 NO NO874286A patent/NO163031C/en unknown
-
1988
- 1988-10-13 WO PCT/NO1988/000078 patent/WO1989003483A1/en active Application Filing
-
1990
- 1990-04-11 SE SE9001325A patent/SE464658B/en not_active IP Right Cessation
Also Published As
Publication number | Publication date |
---|---|
SE9001325L (en) | 1990-04-11 |
SE464658B (en) | 1991-05-27 |
NO163031C (en) | 1990-03-21 |
SE9001325D0 (en) | 1990-04-11 |
WO1989003483A1 (en) | 1989-04-20 |
NO874286L (en) | 1989-04-17 |
NO874286D0 (en) | 1987-10-14 |
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