EP1601879A1 - Hydrospeicher mit positionsanzeige - Google Patents
Hydrospeicher mit positionsanzeigeInfo
- Publication number
- EP1601879A1 EP1601879A1 EP04704192A EP04704192A EP1601879A1 EP 1601879 A1 EP1601879 A1 EP 1601879A1 EP 04704192 A EP04704192 A EP 04704192A EP 04704192 A EP04704192 A EP 04704192A EP 1601879 A1 EP1601879 A1 EP 1601879A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- cylinder tube
- hydraulic accumulator
- permanent magnets
- separating element
- 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
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
- 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
- F15B2201/30—Accumulator separating means
- F15B2201/315—Accumulator separating means having flexible separating means
- F15B2201/3158—Guides for the flexible separating means, e.g. for a collapsed bladder
-
- 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
-
- 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
- F15B2201/50—Monitoring, detection and testing means for accumulators
- F15B2201/515—Position detection for separating means
Definitions
- the invention relates to hydraulic accumulators, such as those provided, among other things , in connection with hydraulic systems for receiving certain volumes of pressurized liquid (for example hydraulic medium) and returning them to the system if required.
- pressurized liquid for example hydraulic medium
- hydropneumatic (gas-pressurized) accumulators are used today, with the movable separating element within the accumulator housing separating a liquid space as the one working space from a gas storage space as the further working space. Nitrogen gas is regularly used as the working gas, and the gas-tight separating element, for example a piston, if it is a piston accumulator, largely allows a decoupling from the gas storage space to the liquid space.
- the liquid part is connected to the hydraulic circuit of the system, so that the accumulator absorbs liquid when the pressure rises and the gas is compressed. When the pressure drops, the compressed gas expands and displaces the stored hydraulic fluid back into the hydraulic circuit. Due to the changes in the company. Volumes of gas storage space and liquid space each result in a corresponding axial movement of the support element within the storage housing.
- the gas pre-filling pressure in the gas supply has a pressure value that is adapted to the pressure level of the liquid part, so that the separating element, i.e. the piston accumulators of the pistons, is located at a suitable point within the cylinder housing , so that the separating element can carry out the required working movements in the axial direction between the end positions in the storage housing.
- the object of the invention is to create a hydraulic storage device which enables the size of the volumes of the working spaces and thus the position of the separating element to be determined in a simple manner during operation.
- the row of magnetic field sensors on the outside of the cylinder tube is essentially along the entire stroke path of the Piston arranged.
- the piston is formed from non-magnetizable material, and the magnet arrangement which generates the magnetic field on the piston has a plurality of permanent magnets which are arranged distributed around the circumference of the piston and are aligned with one another in relation to the axial direction.
- a particularly simple design provides for the magnetic field sensors on the outside of the cylinder tube a series of movable, preferably rod-like permanent magnets, of which those which are aligned with the field generated by the magnet arrangement on the piston can be deflected into a display position by the latter.
- the rod-like permanent magnets function here as visually recognizable display markings, the deflection of which gives an immediate visual display of the respective piston position.
- the rod-like permanent magnets can be deflected against a low restoring force, so that when the piston moves, when the magnetic field of the piston moves out of their area, they automatically return to a starting position.
- the rod-like permanent magnets are freely pivotable for their deflection movement about pivot axes, which are located outside the centers of gravity of the rod-like permanent magnets, so that the acting gravity generates a restoring moment on the rod-like permanent magnets.
- Stainless steel or a non-ferritic metal alloy, for example aluminum alloy can be provided as the material for the non-magnetizable storage housing or, if it is a pressure level of limited height, possibly a plastic material.
- the invention is explained in detail below using an exemplary embodiment shown in the drawing. Show it:
- FIG. 1 shows a longitudinal section of an exemplary embodiment of the hydraulic accumulator according to the invention in the form of a piston accumulator; 2 shows a longitudinal section, drawn on a somewhat larger scale than that of FIG. 1, only of the piston of the exemplary embodiment corresponding to the section line labeled III-III in FIG. 3, and FIG. 3 shows a plan view of the piston shown separately in FIG.
- the embodiment of the hydraulic accumulator according to the invention shown in the drawing is a piston accumulator with a accumulator housing in the form of a circular cylindrical cylinder tube 1, which defines a longitudinal axis 3.
- a piston 9 can be moved in the axial direction as a separating element between a gas storage space 5 and a fluid space 7.
- the piston 9 has piston seals 11 and piston guide means 13 in annular grooves which are incorporated into its circumferential surface, which enable low-friction and gas-tight guidance of the piston 9 along the longitudinal axis 3.
- the cylinder tube 1 is closed by a screwed-in cylinder cover 15. This is traversed by a gas channel 17 to which a gas valve or a filling valve can be connected (neither of which is shown). In a similar manner, the cylinder tube 1 is closed at the end assigned to the fluid space 7 by a screwed-in cover 19 which has a central fluid passage 21.
- the piston 9 has a trough-like inner trough 23, which is concentric with the axis 3 and is open at the piston end facing the gas storage space 5, so that it increases the volume of the gas storage space 5.
- an annular body 25 which is concentric with the axis 3 is screwed to the piston 9 by means of connecting screws 27.
- This ring body 25, whose inner ring opening is aligned with the opening edge of the recess 23 of the piston 9, is made of non-magnetizable material, preferably the same material as the piston 9.
- the annular body 25 serves as a support ring for permanent magnets 29 which are embedded in the circumferential surface of the annular body 25 concentric with the cylinder tube 1 in such a way that their radially outer pole end surfaces 28 (FIG. 2) have a small radial distance from the circumference of the piston 9 and thus from the Have inside wall of the cylinder tube 1, see Fig. 3, in which the outer surface of the piston 9 is designated 31.
- fifteen permanent magnets 29 are arranged at regular angular intervals around the circumference of the piston 9, the permanent magnets 29 being arranged in the same polarity orientation, so that the radially outer pole end faces 28 each form magnetic poles of the same name.
- the piston 9 can be moved during operation along a piston stroke path between an upper end position, in which the ring body 25 rests on the upper cylinder cover 15, and a lower end position, in which the opposite side of the piston 9 to the lower cover 19 is approximated.
- the permanent magnets arranged on the ring body 25 of the piston 9 move along the length of a sensor strip 33 running longitudinally on the outside of the cylinder tube 1.
- On this there is a series of permanent magnets which, in the example shown, have the shape of small bar magnets 35 (only a few of which are numbered in the figure) are arranged, the row of bar magnets 35 extending essentially over the entire length of the sensor strip 33.
- the bar magnets 35 are pivotally mounted on pivot bearings 37 (only a few are numbered in the figure), the pivot axes each extending perpendicular to the longitudinal axis 3 and parallel to the tangent to the adjacent circumference of the cylinder tube 1.
- pivot bearings 37 only a few are numbered in the figure
- the bar magnets 35 can be deflected by the magnetic field that the permanent magnets 29 produce on the ring body 25 of the piston 9 on the longitudinal section of the sensor strip 33 on which the permanent magnets 29 are located.
- this deflection is shown for the piston position shown, in which the piston is located at a short distance from the upper cylinder cover 15.
- the third bar magnet 35 (counted from above) is deflected into the horizontal position, while adjacent second bar magnet 35 and fourth bar magnet 35 are partially deflected.
- This deflection of the bar magnets 35 allows the respective position of the piston 9 within the cylinder tube 1 to be determined by visual comparison with the undeflected other magnets 35 of the sensor strip 33.
- the bar magnets 35 can be provided with a signal coloring.
- the bar magnets 35 can be mounted on the sensor bar 33 in such a way that the deflection of bar magnets 35 caused by the magnetic field on the piston 9 takes place against a low restoring force, so that the bar magnets 35 serving as display elements during migration of the magnetic field, ie during the stroke movement of the piston 9, automatically return to an initial or non-display position.
- the restoring force can be effected in any suitable manner, for example in a simple manner in that the pivot axes 37 of the bar magnets 35 are located outside their center of gravity, so that the bar magnets 35 are automatically reset by gravity when the magnetic field does not act.
- the sensor bar 33 itself could be designed as a device generating a weak magnetic field, for example the sensor bar 33 itself could form a weak bar magnet ,
- a non-magnetizable material is provided for the cylinder tube 1, the piston 9 and its ring body 25 in the invention.
- a non-magnetizable steel stainless steel
- a non-ferritic metal alloy aluminum alloy or also a plastic material
- a plastic material can be provided for the cylinder tube 1.
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)
- Actuator (AREA)
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10310427A DE10310427A1 (de) | 2003-03-11 | 2003-03-11 | Hydrospeicher |
DE10310427 | 2003-03-11 | ||
PCT/EP2004/000471 WO2004081389A1 (de) | 2003-03-11 | 2004-01-22 | Hydrospeicher mit positionsanzeige |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1601879A1 true EP1601879A1 (de) | 2005-12-07 |
EP1601879B1 EP1601879B1 (de) | 2008-03-05 |
Family
ID=32920701
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04704192A Expired - Lifetime EP1601879B1 (de) | 2003-03-11 | 2004-01-22 | Hydrospeicher mit positionsanzeige |
Country Status (5)
Country | Link |
---|---|
US (1) | US7234490B2 (de) |
EP (1) | EP1601879B1 (de) |
AT (1) | ATE388329T1 (de) |
DE (2) | DE10310427A1 (de) |
WO (1) | WO2004081389A1 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8020587B2 (en) * | 2007-06-11 | 2011-09-20 | The United States Of America As Represented By The Administrator Of The U.S. Environmental Protection Agency | Piston-in sleeve hydraulic pressure accumulator |
GB0811562D0 (en) * | 2008-06-24 | 2008-07-30 | Aes Eng Ltd | Mechanical seal support system |
IT1393598B1 (it) * | 2009-03-31 | 2012-04-27 | Natali | Attuatore pneumatico |
DE102009016570A1 (de) * | 2009-04-06 | 2010-10-07 | Robert Bosch Gmbh | Kolbenspeicher |
DE102009034512A1 (de) * | 2009-07-25 | 2011-01-27 | Schaeffler Technologies Gmbh & Co. Kg | Vorrichtung zur variablen Einstellung der Steuerzeiten von Gaswechselventilen einer Brennkraftmaschine |
US8281897B1 (en) * | 2010-02-02 | 2012-10-09 | Trendsetter Engineering, Inc. | Automatic accumulator switching apparatus and system |
US9428994B2 (en) | 2010-07-01 | 2016-08-30 | National Oilwell Varco, L.P. | Blowout preventer monitor with trigger sensor and method of using same |
EP2588709B1 (de) | 2010-07-01 | 2018-02-21 | National Oilwell Varco, L.P. | Ausblasverhinderungs-überwachungssystem und verfahren zu seiner verwendung |
US8602063B2 (en) * | 2011-02-08 | 2013-12-10 | Hamilton Sundstrand Corporation | Gas over liquid accumulator |
DE102014001283A1 (de) * | 2014-02-01 | 2015-08-06 | Hydac Technology Gmbh | Druckspeicher |
DE102015005395A1 (de) | 2015-04-28 | 2016-11-03 | Hydac Technology Gmbh | Hydrospeicher |
US9587461B1 (en) * | 2015-09-11 | 2017-03-07 | Cameron International Corporation | Systems and methods for monitoring blowout preventer equipment |
US10190604B2 (en) * | 2015-10-22 | 2019-01-29 | Caterpillar Inc. | Piston and magnetic bearing for hydraulic hammer |
DE102016007798A1 (de) | 2016-06-25 | 2017-12-28 | Hydac Technology Gmbh | Hydropneumatischer Kolbenspeicher |
JP2019521294A (ja) | 2016-06-25 | 2019-07-25 | ハイダック テクノロジー ゲゼルシャフト ミット ベシュレンクテル ハフツングHydac Technology Gesellschaft Mit Beschrankter Haftung | 油空圧式ピストン型アキュムレータ |
DE102016007824A1 (de) | 2016-06-25 | 2017-12-28 | Hydac Technology Gmbh | Hydropneumatischer Kolbenspeicher |
EP3296574A1 (de) * | 2016-09-20 | 2018-03-21 | Eaton SAS | Akkumulator mit fluidpegelindikator |
US10208555B2 (en) | 2016-09-27 | 2019-02-19 | Cameron International Corporation | Blowout preventer monitoring systems and methods |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4181835A (en) * | 1978-03-27 | 1980-01-01 | Bowden John W | Gas flow indicator having a magnetic field sensitive switch that _is responsive to the position of a magnet secured to a piston |
DE3411367A1 (de) * | 1984-03-28 | 1985-10-10 | Robert Bosch Gmbh, 7000 Stuttgart | Druckmittelspeicher |
US4754648A (en) * | 1986-12-23 | 1988-07-05 | Halliburton Company | Safety relief for piston-type gauge protector |
US4755636A (en) * | 1987-06-24 | 1988-07-05 | Taiyo, Ltd. | Piston position detecting device for fluid pressure cylinder |
DE3910691C2 (de) | 1989-04-03 | 1998-07-09 | Teves Gmbh Alfred | Fluidaggregat |
DE10143675A1 (de) * | 2001-08-01 | 2003-02-13 | Continental Teves Ag & Co Ohg | Kolbenspeicher |
-
2003
- 2003-03-11 DE DE10310427A patent/DE10310427A1/de not_active Withdrawn
-
2004
- 2004-01-22 AT AT04704192T patent/ATE388329T1/de not_active IP Right Cessation
- 2004-01-22 US US10/548,469 patent/US7234490B2/en not_active Expired - Fee Related
- 2004-01-22 DE DE502004006412T patent/DE502004006412D1/de not_active Expired - Lifetime
- 2004-01-22 EP EP04704192A patent/EP1601879B1/de not_active Expired - Lifetime
- 2004-01-22 WO PCT/EP2004/000471 patent/WO2004081389A1/de active IP Right Grant
Non-Patent Citations (1)
Title |
---|
See references of WO2004081389A1 * |
Also Published As
Publication number | Publication date |
---|---|
ATE388329T1 (de) | 2008-03-15 |
WO2004081389A1 (de) | 2004-09-23 |
US20060213365A1 (en) | 2006-09-28 |
US7234490B2 (en) | 2007-06-26 |
DE502004006412D1 (de) | 2008-04-17 |
EP1601879B1 (de) | 2008-03-05 |
DE10310427A1 (de) | 2004-09-30 |
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