US3856048A - Hydropneumatic accumulator - Google Patents

Hydropneumatic accumulator Download PDF

Info

Publication number
US3856048A
US3856048A US00370808A US37080873A US3856048A US 3856048 A US3856048 A US 3856048A US 00370808 A US00370808 A US 00370808A US 37080873 A US37080873 A US 37080873A US 3856048 A US3856048 A US 3856048A
Authority
US
United States
Prior art keywords
accumulator
compartment
gas
nitrogen
pressure
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.)
Expired - Lifetime
Application number
US00370808A
Other languages
English (en)
Inventor
J Gratzmuller
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Application granted granted Critical
Publication of US3856048A publication Critical patent/US3856048A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
    • F15B21/06—Use of special fluids, e.g. liquid metal; Special adaptations of fluid-pressure systems, or control of elements therefor, to the use of such fluids
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
    • H01H33/02—Details
    • H01H33/53—Cases; Reservoirs, tanks, piping or valves, for arc-extinguishing fluid; Accessories therefor, e.g. safety arrangements, pressure relief devices
    • 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
    • F15B2201/312—Sealings therefor, e.g. piston rings
    • 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
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin

Definitions

  • ABSTRACT This invention relates to a hydropneumatic accumulator comprising a piston and cylinder arrangement defining in the cylinder a first compartment in which is provided a gas which is under pressure and which has a density less than that of nitrogen and a second compartment in which liquid is provided.
  • Helium is the gas preferably used, such that, on the one hand, a much larger volumeof the liquid can be stored in the accumulator at a predetermined pressure than is possible using nitrogen, and, on the other hand, the variations in pressure due to variations in temperature is much less than with nitrogen.
  • the invention is particularly applicable to hydraulic controls for electric circuit breakers.
  • hydropneumatic piston accumulators are substantially made up of a sealed cylinder divided by a piston into two compartments of volumes which are inversely variable, one compartment enclosing a cushion of gas under pressure, forming an elastic buffer, the other compartment containing a liquid, generally oil, which is thus stored and always available at the pressure established by the cushion of gas.
  • Such accumulators are widely used in hydraulic control installations (e.g., hydraulic circuit breaker controls). where they ensure that there is always available a predetermined minimum volume of oil at a predetermined minimum pressure. In these installations, the accumulators are generally periodically recharged or reinflated with oil by a pump.
  • the present invention is a hydropneumatic accumulator comprising a sealed cylinder having a piston slidably located thereon and defining with the cylinder a first compartment enclosing a gas under pressure and a second compartment enclosing a liquid, the improvement that the gas enclosed in said first compartment is a gas of a density less than that of nitrogen.
  • FIG. 1 is a diagrammatic view of an accumulator according to the invention in an hydraulic control installation
  • FIG. 2 is a graph showing the volumes of oil available as a function of the pressures in an accumulator according to the invention, and in a conventional nitrogen accumulator at a temperature of 20C.
  • FIG. 3 is an analogous graph, but drawn for temperatures of +50 and 35C;
  • F IG. 4 is a diagrammatic view in section of an electrical circuit breaker fitted with a static hydropneumatic accumulator according to the invention
  • FIG. 5 is a diagram showing the advantages of accumulators according to the invention for static applications.
  • FIG. 6 shows an embodiment of a hydropneumatic accumulator according to the invention and, diagrammatically, the hydraulic installation on which this accumulator is mounted.
  • FIG. 1 illustrates a hydropneumatic accumulator which comprises a sealed container formed by a cylinder 3 and two end parts 5 and 7.
  • the cylinder 3 has a piston 13 slidably located therein, the piston 13 defining with the cylinder 3, two compartments 9 and 11.
  • Compartment 9 encloses a gas under pressure i.e., according to the invention a gas of a density less than that of nitrogen, such as helium, hydrogen or neon, while compartment 11 contains oil.
  • helium is preferable chosen, as it is not flammable, is chemically neutral and is easily obtained. It will be shown later that, in spite of the high cost of helium compared to nitrogen (about 15 times dearer), an
  • accumulator inflated with helium is less costly than one inflated with nitrogen, for identical performances.
  • FIG. 1 also shows the essential elements of a conventional working circuit of such an accumulator.
  • the oil compartment 11 is connected by a pipe 15 to a motor apparatus such as a jack 17, a rod 19 of which can activate any controllable device e.g. the mobile contact of an electrical circuit-breaker, if the installation is used as an hydraulic circuit-breaker control.
  • a valve 21 interposed in the'pipe 15 allows the jack 17 to be selectively linked to the high pressure of the accumulator or to a low-pressure tank or container 23.
  • a pump 25 draws oil from tank 23 and recharges compartment 11 of the accumulator with oil under pressure. It may thus be said that in this application, the accumulator operates as an active appliance, receiving or restoring energy.
  • a pipe 27, equipped with a stop-valve 29 allows compartment 9 of the accumulator to be supplied with gas at the initial pre-inflation pressure, and also allows the accumulator to be recharged if there is a gas leak.
  • FIG. 2 shows, in the form of a graph, the functioning of an accumulator as described above.
  • the volumes of oil in cm introduced into the accumulator, or capable of being restored by it, are entered as abscissae, and the corresponding pressures in kg/cm as ordinates.
  • Curve A relates to a conventional accumulator charged with nitrogen
  • curve B to an accumulator according to the invention charged with helium
  • curve C is a theoretical curve representing the functioning of an accumulator charged with a perfect gas which obeys exactly, for the high pressure considered, Mariottes (Boyles) law PVC".
  • These three curves are drawn for an identical temperature of +20C and for an identical accumulator of a total internal capacity of 1,000 cm, capable of delivering oil at a pressure between about 400 and 600 kg/cm
  • the abscissa shows that the accumulator was pre-inflated with nitrogen at a pressure of about 400 kg/cm Oil is then introduced under pressure into the oil compartment.
  • Point 33 on the curve shows that, after introduction of 123.5cm of oil the pressure of the accumulator is raised to about 500 kg/cm and, after introduction of 206cm of oil (point 35 of the curve) the pressure reaches about 600 kg/cm
  • a reserve of energy constituted by the output of 206cm of oil at a pressure between about 600 and 400 kg/cm (at a temperature of 20C).
  • the theoretical curve C representing the phenomenon if the accumulator could be charged with a perfect gas (PV-C) has above all the object of showing the loss of compressibility which arises with nitrogen, this loss being much less with helium (or with another less dense gas such as hydrogen).
  • the point 39 on curve C corresponds to a pressure of about 600 kg/cm and to a volume of oil of 333 cm It may be deduced from this that the nitrogen accumulator allows only 206/333 62 percent of the maximum theoretically storable energy to be stored, while the helium accumulator allows 303/333 91 percent of this maximum theoretical energy.
  • a gas less dense than nitrogen which is likewise suitable for an accumulator according to the invention is hydrogen (density relative to air; 0.069), whose curve (not shown) would be located substantially between those for nitrogen and helium.
  • Point 40 appearing in Flg. 2 for a pressure of about 600 kg/cm corresponds to a volume of available oil of about 255 cm, in an accumulator inflated with hydrogen, i.e. an increase in available energy of 24 percent relative to a conventional nitrogen accumulator.
  • neon density relative to air
  • helium despite its cost, which is about times higher than that of nitrogen, allows hydropneumatic accumulators to be made more economically than those filled with nitrogen.
  • the total internal capacity (and thus the dimensions) of a conventional nitrogen accumulator would have to be about 50 percent greater than those of a helium accumulator according to the invention, which would increase the cost price by about 50 percent, while the increase in cost price due to the use of helium in the place of nitrogen is less than 7 percent.
  • curves D and E are the function curves respectively at 35C and +50C of a helium accumulator according to the invention, having served to trace the curve B in FIG. 2.
  • Curves F and G are the curves, respectively at 35C and +50C of a conventional nitrogen accumulator of the same capacity, having served to trace the curve A in FIG. 2.
  • the accumulator was initially preinflated to a pressure of 400 kg/cm at a temperature of C, as in the case of FIG. 2, and the total interior capacity of the accumulator is 1,000 cm, as indicated before.
  • a gain in available energy of at least 70 percent when operating at very variable ambient temperatures, and for example, in a range between +50C and 35C;
  • the accumulator 78 comprises a cylinder 94 in which is slidably located a piston 80 defining with the cylinder 94 a gas compartment 82, filled with a gas less dense than nitrogen, particularly helium, under pressure, and a liquid compartment 76 filled with the above mentioned dielectric gas in the liquid state.
  • the liquid compartment 76 communicates with the internal volume 69 of the cut-off chamber 52 by a narrow-bore tube 74.
  • a valve 84 allows the accumulator to be reinflated and, by means of a monometer 86, the maintenance of the pressure of the dielectric fluid in the circuit-breaker can be checked.
  • nitrogen was chosen to fill the gas compartment 82, i.e. to constitute the cushion of elastic gas of the accumulator. It was also indicated that the manometer 86 could be used to automatically control operations for re-establishing the pressure.
  • nitrogen is not used to form the gaseous elastic cushion, but a gas less dense than nitrogen, and in particular, helium. It will be shown in the following that, due to the helium, the pressure limits of the dielectric fluid necessary for correct functioning of the circuit-breaker can be naturally respected without having recourse to an automatic system for controlling and regulating the pressure, as might be necessary with an accumulator inflated with nitrogen.
  • the passage of the current may raise the temperature of the SP6 to 30C.
  • the extreme temperatures for the liquid may vary from 35C (cold, open) to +80C (hot, closed) i.e. a temperature differential of the liquid of 115C.
  • this differential of 115C will only affect the liquid contained in the cut-off chamber, whereas the accumulator itself will only be subjected to variations in external temperature i.e. from 35C to +50C.
  • pre-inflation pressures have been indicated above as a function of temperature, in the case of a nitrogen accumulator, and in that of a helium accumulator, both pre-inflated to 400 kg/cm at a temperature of 20C.
  • the variations are mainly due to the expansion of the gas and also to the expansion of the liquid in the cut-off chamber.
  • One of the known methods consists in using an accumulator of very large volume i.e. with a large-volume gas compartment.
  • an accumulator of very large volume i.e. with a large-volume gas compartment.
  • a helium accumulator of a sufficiently high volume will fulfil the requirements set, and will thus ensure, in a static manner and without any regulation apparatus, that the pressure is kept between the selected limits.
  • the nitrogen accumulator will only be suitable in zone C of FIG. 5.
  • the helium accumulator will be suitable in zones B and C. No accumulator will satisfy the requirements of zone A.
  • a circuit-breaker will be postulated, in which the volume of dielectric liquid (SP6) is such that the volume variations (hot and cold) of the liquid are 1,000 cm, i.e. the accumulator must be able to absorb or restore 1,000 cm of liquid.
  • SP6 volume of dielectric liquid
  • a pressure-decrease latitude ratio of 50 percent is chosen (e.g. pressure between 600 and 300 kg/cm so that this pressure can be attained by both types of accumulator (Zone C, FIG.
  • hydro-pneumatic accumulator provided with reference means indicating the position of the piston in the cylinder of the accumulator, these means enabling control of the filling of the accumulator with oil as a function of the volume of oil in the latter, and not as a function of pressure.
  • a cylinder 103 of an accumulator 101 has a piston 113 slidably located therein, the piston 113 defining with the cylinder 103 a gas compartment 109 filled under pressure with a gas less dense than nitrogen, this gas preferably being helium, and a liquid compartment 111 filed with oil which supplies a working circuit 117.
  • the helium accumulator is provided with an extension rod 127 which is integral with piston 113, and which passes through a base 105 of cylinder 103, through a sealed joint 129.
  • the outer end of the rod 127 preferably having a widened part 131 forming a cam, can actuate control keys of one or more electrical contacts 133-433 incorporated in the supply circuit of an electric motor 135 driving an oil filling pump 125.
  • contact 133 is a start switch for motor 135, while contact 133 is a stop switch for the same motor. Due to this arrangement, it is possible to keep permanently in the accumulator a reserve of oil under pressure whose volume is between two predetermined limits, which are fixed by the position of cam 131 of the emerging rod relative to the keys of the switches 133-133.
  • the position of cam 131 is preferably adjustable on rod 127, in order to regulate the tripping positions of switches 133-133.
  • the total capacity of the accumulator should be 3,500 cm in the case of an accumulator filled with helium, and 11,200 cm in the case of a nitrogen accumulator, for a pressure decrease of 50 percent.
  • the variations in pressure, for the temperature variations indicated above, would then be between about 600 and 300 kg/cm, i.e. the maximum decrease in pressure would be 50 percent.
  • the capacity of the nitrogen accumulator should be more than three times greater than that of the helium accumulator, for identical performance.
  • the helium accumulator would give pressure decreases well below those of the nitrogen accumulator.
  • the pressure decrease may be reduced much more.
  • the total capacity of the accumulator should be 8.186 cm with a helium accumulator and 15.610 cm with a conventional nitrogen accumulator (the preinfiation pressures being respectively about 464 kg/cm and 458 kg/cm at 20C).
  • a helium accumulator can have a volume half that of the conventional nitrogen accumulator.
  • a hydropneumatic accumulator comprising a sealed cylinder having a piston slidably located therein and defining with the cylinder a first compartment and a second compartment, the second compartment enclosing a liquid and the first compartment enclosing a body of gas compressed to a maximum operating pressure of at least 200 kglcm said gas having a density less than that of nitrogen.
  • An accumulator according to claim 1 in which the gas is compressed to a maximum operating pressure of between 300 and 1,000 kg/cm 6.
  • an hydropneumatic accumulator comprising a sealed cylinder having a piston slidably located therein and defining with the cylinder a first compartment enclosing a gas under pressure and a second compartment enclosing a liquid, the improvement that the gas enclosed in the first compartment is a gas of a density less than that of nitrogen, and the liquid enclosed in the second compartment is a liquefiable gas kept in the liquid state by the pressure exerted by the gas contained in the first compartment.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)
  • Separation By Low-Temperature Treatments (AREA)
US00370808A 1970-01-29 1973-06-18 Hydropneumatic accumulator Expired - Lifetime US3856048A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR7003105A FR2076812A5 (ja) 1970-01-29 1970-01-29
FR7047483A FR2120383A6 (ja) 1970-01-29 1970-12-31
FR717100010A FR2121340B2 (ja) 1970-01-29 1971-01-04

Publications (1)

Publication Number Publication Date
US3856048A true US3856048A (en) 1974-12-24

Family

ID=27249278

Family Applications (1)

Application Number Title Priority Date Filing Date
US00370808A Expired - Lifetime US3856048A (en) 1970-01-29 1973-06-18 Hydropneumatic accumulator

Country Status (11)

Country Link
US (1) US3856048A (ja)
JP (1) JPS5842641Y2 (ja)
AT (1) AT307843B (ja)
BE (1) BE762192A (ja)
CA (1) CA942162A (ja)
CH (1) CH533769A (ja)
ES (1) ES387667A1 (ja)
FR (3) FR2076812A5 (ja)
GB (1) GB1321586A (ja)
NL (1) NL152637B (ja)
SE (1) SE376277B (ja)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4649704A (en) * 1984-12-24 1987-03-17 Shell Offshore Inc. Subsea power fluid accumulator
US4667699A (en) * 1985-05-09 1987-05-26 Nestec S.A. Device for damping fluid shocks in pipe systems
US4819697A (en) * 1985-08-16 1989-04-11 Rockwell International Corporation Helium charged hydraulic accumulators
US5074193A (en) * 1987-07-29 1991-12-24 Brunswick Corporation Marine power steering system
US5241894A (en) * 1987-07-29 1993-09-07 Brunswick Corporation Marine power steering system
USRE36984E (en) * 1995-02-14 2000-12-12 Control Components Inc. Fluid flow controlling device
US20080104951A1 (en) * 2006-11-07 2008-05-08 Springett Frank B Subsea pressure accumulator systems
US20080185046A1 (en) * 2007-02-07 2008-08-07 Frank Benjamin Springett Subsea pressure systems for fluid recovery
US20080267786A1 (en) * 2007-02-07 2008-10-30 Frank Benjamin Springett Subsea power fluid recovery systems
CN101907106A (zh) * 2009-03-06 2010-12-08 通用汽车环球科技运作公司 主动型电动蓄能器
US20110290496A1 (en) * 2010-05-28 2011-12-01 Mcmiles Barry Gasless Pilot Accumulator
WO2012159455A1 (zh) * 2011-05-20 2012-11-29 Chen Qixing 一种基于储压剂的液压存储仓及其液压系统
US8727018B1 (en) 2013-07-19 2014-05-20 National Oilwell Varco, L.P. Charging unit, system and method for activating a wellsite component
CN112049836A (zh) * 2019-06-05 2020-12-08 大连中和聚能自动控制系统有限公司 气动执行机构可视化系统
US11193506B2 (en) 2018-11-15 2021-12-07 Canon Kabushiki Kaisha Pulsation dampener with gas retention
CN116336014A (zh) * 2023-05-31 2023-06-27 罗特液压(太仓)有限公司 一种双活塞式蓄能器

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2154928A5 (ja) * 1971-09-30 1973-05-18 Gratzmuller Jean Louis
US4041990A (en) * 1976-04-05 1977-08-16 The Bendix Corporation Accumulator for use in a hydraulic system
NL7706448A (nl) * 1977-06-13 1978-12-15 Philips Nv Drukenergie-accumulator.
DE3442909A1 (de) * 1984-11-24 1986-05-28 Alfred Teves Gmbh, 6000 Frankfurt Vorrichtung zur steuerung des druckes in dem hilfsdruck-versorgungssystem einer bremsanlage
ES2060888T3 (es) * 1989-10-28 1994-12-01 Hemscheidt Fahrwerktech Gmbh Sistema de suspension hidroneumatica.
EP0425876A3 (en) * 1989-10-28 1991-09-11 Hermann Hemscheidt Maschinenfabrik Gmbh & Co. Hydropneumatic piston accumulator
CN107817841B (zh) * 2017-09-30 2019-12-31 中国科学院合肥物质科学研究院 一种临液氦温度的精准温度控制系统
EP3530988A1 (de) * 2018-02-21 2019-08-28 Flender GmbH Ölförder- und speichervorrichtung sowie getriebe mit einer solchen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2170890A (en) * 1937-04-08 1939-08-29 Link Belt Co Removable accumulator
US2747370A (en) * 1952-01-15 1956-05-29 William A Traut Fluid pressure device
US2829672A (en) * 1955-03-23 1958-04-08 Superior Pipe Specialties Co Accumulator
US2999680A (en) * 1959-02-24 1961-09-12 Du Pont Pneumatic spring suspension
US3064686A (en) * 1957-08-23 1962-11-20 Gratzmuller Jean Louis Hydro-pneumatic accumulators
US3326241A (en) * 1964-01-25 1967-06-20 Mercier Olaer Patent Corp Pressure vessel

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1181985A (fr) * 1957-09-04 1959-06-19 Perfectionnements aux installations de commande hydraulique
DE1188247B (de) * 1959-10-17 1965-03-04 Friedrich Stuebbe Druckmittelakkumulator fuer den hydraulischen Antrieb von Spritzgiessmaschinen, Werkzeugmaschinen od. dgl.
FR1407711A (fr) * 1964-06-22 1965-08-06 Perfectionnements apportés aux accumulateurs hydro-pneumatiques

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2170890A (en) * 1937-04-08 1939-08-29 Link Belt Co Removable accumulator
US2747370A (en) * 1952-01-15 1956-05-29 William A Traut Fluid pressure device
US2829672A (en) * 1955-03-23 1958-04-08 Superior Pipe Specialties Co Accumulator
US3064686A (en) * 1957-08-23 1962-11-20 Gratzmuller Jean Louis Hydro-pneumatic accumulators
US2999680A (en) * 1959-02-24 1961-09-12 Du Pont Pneumatic spring suspension
US3326241A (en) * 1964-01-25 1967-06-20 Mercier Olaer Patent Corp Pressure vessel

Cited By (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4649704A (en) * 1984-12-24 1987-03-17 Shell Offshore Inc. Subsea power fluid accumulator
US4667699A (en) * 1985-05-09 1987-05-26 Nestec S.A. Device for damping fluid shocks in pipe systems
US4819697A (en) * 1985-08-16 1989-04-11 Rockwell International Corporation Helium charged hydraulic accumulators
US5074193A (en) * 1987-07-29 1991-12-24 Brunswick Corporation Marine power steering system
US5241894A (en) * 1987-07-29 1993-09-07 Brunswick Corporation Marine power steering system
US5392690A (en) * 1987-07-29 1995-02-28 Brunswick Corporation Marine power steering system
USRE36984E (en) * 1995-02-14 2000-12-12 Control Components Inc. Fluid flow controlling device
US7520129B2 (en) 2006-11-07 2009-04-21 Varco I/P, Inc. Subsea pressure accumulator systems
US20080104951A1 (en) * 2006-11-07 2008-05-08 Springett Frank B Subsea pressure accumulator systems
US8464525B2 (en) 2007-02-07 2013-06-18 National Oilwell Varco, L.P. Subsea power fluid recovery systems
US20080267786A1 (en) * 2007-02-07 2008-10-30 Frank Benjamin Springett Subsea power fluid recovery systems
US7926501B2 (en) 2007-02-07 2011-04-19 National Oilwell Varco L.P. Subsea pressure systems for fluid recovery
US20080185046A1 (en) * 2007-02-07 2008-08-07 Frank Benjamin Springett Subsea pressure systems for fluid recovery
CN101907106A (zh) * 2009-03-06 2010-12-08 通用汽车环球科技运作公司 主动型电动蓄能器
CN101907106B (zh) * 2009-03-06 2016-01-20 通用汽车环球科技运作公司 主动型电动蓄能器
US8939215B2 (en) * 2010-05-28 2015-01-27 The Subsea Company Gasless pilot accumulator
US20110290496A1 (en) * 2010-05-28 2011-12-01 Mcmiles Barry Gasless Pilot Accumulator
WO2012159455A1 (zh) * 2011-05-20 2012-11-29 Chen Qixing 一种基于储压剂的液压存储仓及其液压系统
US8727018B1 (en) 2013-07-19 2014-05-20 National Oilwell Varco, L.P. Charging unit, system and method for activating a wellsite component
US11193506B2 (en) 2018-11-15 2021-12-07 Canon Kabushiki Kaisha Pulsation dampener with gas retention
CN112049836A (zh) * 2019-06-05 2020-12-08 大连中和聚能自动控制系统有限公司 气动执行机构可视化系统
CN116336014A (zh) * 2023-05-31 2023-06-27 罗特液压(太仓)有限公司 一种双活塞式蓄能器
CN116336014B (zh) * 2023-05-31 2023-11-03 罗特液压(太仓)有限公司 一种双活塞式蓄能器

Also Published As

Publication number Publication date
DE2103552A1 (de) 1971-08-05
FR2121340A2 (ja) 1972-08-25
FR2121340B2 (ja) 1974-02-15
FR2120383A6 (ja) 1972-08-18
CH533769A (de) 1973-02-15
BE762192A (fr) 1971-07-27
JPS5288708U (ja) 1977-07-02
CA942162A (en) 1974-02-19
JPS5842641Y2 (ja) 1983-09-27
ES387667A1 (es) 1974-11-16
FR2076812A5 (ja) 1971-10-15
NL7101249A (ja) 1971-08-02
NL152637B (nl) 1977-03-15
AT307843B (de) 1973-06-12
SE376277B (ja) 1975-05-12
DE2103552B2 (de) 1972-08-31
GB1321586A (en) 1973-06-27

Similar Documents

Publication Publication Date Title
US3856048A (en) Hydropneumatic accumulator
US3015345A (en) Combination reservoir-accumulator arrangement for hydraulic system
US3336948A (en) Hydro-pneumatic accumulator
US4819697A (en) Helium charged hydraulic accumulators
US4243856A (en) Piston-type hydropneumatic accumulator equipped with a gas shortage detection device
US3804443A (en) Impact absorbing device using compressible liquid
US2723847A (en) Double acting liquid shock isolator
KR890000323B1 (ko) 온도 보정 가스 스프링 장치
US3752461A (en) Pneumatic spring devices
US4461937A (en) Fail-safe hydraulically operated circuit breaker accumulator arrangement
US3230976A (en) Pressure container
US5502290A (en) Switch mechanism
US3531609A (en) Electrical circuit breaker
US3886744A (en) Power-control system for stirling engines
SU735196A3 (ru) Электрический силовой выключатель
EP0363676B2 (en) A container piston rod unit
CN110500503A (zh) 一种气体高密封快速调压系统及方法
GB983109A (en) An improved oil-pneumatic suspension device
US3019280A (en) Pressure type oil feeding tank for oil
CA1247175A (en) Oleopneumatic control system for electric circuit- breakers
CN211694347U (zh) 安全型供气系统及lng撬装式供气站
CN210483927U (zh) 自力式船用稳压装置
US2627249A (en) Fluid pressure operated positioning apparatus for motor valves
JPS6256372B2 (ja)
US2415812A (en) Pressure regulator