EP3475584A1 - Hydropneumatic piston accumulator - Google Patents
Hydropneumatic piston accumulatorInfo
- Publication number
- EP3475584A1 EP3475584A1 EP17731805.2A EP17731805A EP3475584A1 EP 3475584 A1 EP3475584 A1 EP 3475584A1 EP 17731805 A EP17731805 A EP 17731805A EP 3475584 A1 EP3475584 A1 EP 3475584A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- piston
- housing
- measuring system
- cladding tube
- accumulator according
- 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
- 238000007789 sealing Methods 0.000 claims abstract description 12
- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 238000005253 cladding Methods 0.000 claims description 49
- 230000005291 magnetic effect Effects 0.000 claims description 20
- 230000005855 radiation Effects 0.000 claims description 8
- 239000010720 hydraulic oil Substances 0.000 claims description 6
- 230000003287 optical effect Effects 0.000 claims description 5
- 239000004020 conductor Substances 0.000 claims description 3
- 230000001939 inductive effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 abstract description 11
- 239000012530 fluid Substances 0.000 abstract description 5
- 238000010276 construction Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000002604 ultrasonography Methods 0.000 description 2
- 101150110188 30 gene Proteins 0.000 description 1
- 230000001133 acceleration Effects 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000004323 axial length Effects 0.000 description 1
- 230000006399 behavior Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000001010 compromised effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 150000001993 dienes Chemical class 0.000 description 1
- 239000000806 elastomer Substances 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- RZTAMFZIAATZDJ-UHFFFAOYSA-N felodipine Chemical compound CCOC(=O)C1=C(C)NC(C)=C(C(=O)OC)C1C1=CC=CC(Cl)=C1Cl RZTAMFZIAATZDJ-UHFFFAOYSA-N 0.000 description 1
- 239000003302 ferromagnetic material Substances 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000691 measurement method Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 239000012811 non-conductive material Substances 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000012549 training Methods 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/04—Accumulators
- F15B1/08—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor
- F15B1/24—Accumulators using a gas cushion; Gas charging devices; Indicators or floats therefor with rigid separating means, e.g. pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/30—Accumulator separating means
- F15B2201/31—Accumulator separating means having rigid separating means, e.g. pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2201/00—Accumulators
- F15B2201/50—Monitoring, detection and testing means for accumulators
- F15B2201/515—Position detection for separating means
Definitions
- the invention relates to a hydropneumatic piston accumulator, with a storage housing defining a housing longitudinal axis, in which a piston between two opposite housing covers is lekssverfahr- bar in the housing a working space for a compressible medium, such as a working gas from a working space for an incompressible medium Has as-Hydratiliköl-trenrit-and-at least a part of a continuously determining the respective position of the piston in the housing path measuring device.
- Hydraulic accumulators such as hydropneumatic piston accumulators, are used in hydraulic systems to take up certain volumes of pressurized fluid, such as hydraulic oil, and to return it to the system when needed.
- flawless performance of the memory is a prerequisite that the prevailing pressure in the working chamber of the working gas is adapted to the pressure level in the oil-side working space, so that the piston is located at appropriate locations within the storage enclosure and thereby the working movements between piston end positions in the storage enclosure can perform.
- the determination of the position occupied by the piston at a given fluid pressure in the oil-side working space also allows a determination of the amount of filling pressure of the working gas in the associated working space and thus monitoring the piston accumulator for proper functioning.
- a significant feature of the invention is that a rod-like guide is stationarily arranged in the storage housing, which fully penetrates the piston in each of its traversing positions in the storage housing and along the piston until each striking on one of both housing cover is movably guided and that the piston is sealed against this guide by means of a sealing device.
- the secure internal guidance of the piston which according to the invention is provided by the rod-like guidance of the piston, ensures a more reliable and accurate measured value generation compared with the prior art when different measuring methods known in the prior art are used.
- the seal formed between the piston and the rod-like guide and the resulting secure separation of the media of the working spaces ensure a particularly reliable function of the piston accumulator, even during the generation of the measured value.
- the path measuring device can be an optical measuring system, such as a laser measuring system, an acoustic measuring system, such as an ultrasonic measuring system, a magnetic measuring system, an inductive measuring system, a Hall sensor measuring system or a magnetostrictive measuring system.
- a relevant laser measuring system can, as shown in the documents DE 10 201 1 007 765 A1 or DE 10 2014 105 1 54 A1, be formed.
- ultrasonic measuring device a system can be used, as shown in the document DE 10 2013 009 614 A1.
- the rod-like guide in the storage housing may be at least partially designed as a hollow rod and have further parts of the path measuring device, such as a waveguide of a magnetostrictive measuring system or a Hall sensor chain of a sensor measuring system, or the leadership of the piston can directly from the be formed further parts of the respective displacement measuring device, such as the waveguide of the magnetostrictive measuring system.
- the formation of the rod-like guide as a hollow rod is particularly advantageous in the use of optical measuring systems and acoustic measuring systems, because in the interior of the hollow rod is a space separated from the work space for emitted and reflected optical or acoustic measuring radiation available.
- the propagation speed is not influenced by conditions such as pressure and temperature as labor in the eleventh lead free Ultrasetml Udei Free ⁇ taserslrahlung dur rMe ⁇ diene with changing speed of sound or optical transmittance therethrough would be the case, the measurement result is not of changing media conditions is compromised , as is the case with the cited prior art.
- a passage preferably formed coaxially to the longitudinal axis in the piston can be provided, on which there is a permanent magnet device.
- the permanent magnet device can serve as a position sensor.
- the rod-like guide can be formed by an enveloping element immediately surrounding the measuring wire made of an electrically non-conductive material.
- this enveloping element which consists for example of a plastic, and an electrical return conductor for the measurement process triggering current pulse can be embedded to be covered by another, the outside of the rod-like guide forming round strand forming enveloping layer.
- the rod-like guide forming hollow rod is preferably formed by a preferably pressure-resistant, circular cladding.
- this consists of a non-magnetic, metallic material.
- the smooth-surfaced outer surface allows in the implementation of the piston to form a smooth guide in the traversing movements of the piston.
- the arrangement can be made such that the storage housing has a cylinder tube which is closed at both ends by a housing cover, wherein the cladding tube is fixed with at least one open end on one of the housing cover and on which the mi ⁇ em ⁇ A ⁇ He le tei ⁇ s-ma n tostrii ⁇ measuring system connected, a pulse transmitter / receiver having pulse converter is arranged.
- a position sensor can be displaceably guided in the cladding tube, which follows the piston movements by the magnetic force of the permanent magnet device acting between it and the piston, wherein a transceiver of the displacement measuring device is arranged on one of the housing covers the relevant open end of the cladding tube transmits measuring radiation to the position transmitter and receives reflected radiation from it. Since a space separated by the media in the working spaces of the piston accumulator space is available for the measuring radiation through the cladding tube, the impairments of the measurement result caused by state changes of the media in the prior art are eliminated.
- the cover receiving the open end of the cladding tube adjoins the gas-side working space.
- the pulse generator of the respective sensor system can advantageously be arranged on the housing cover which accommodates the open end of the cladding tube, so that the opposite housing cover remains unhindered free for the connection connection of the pipeline leading to the associated hydraulic system (not shown).
- the cladding may also be open at its unspecified free end or closed at its unspecified free end.
- the pressure equalization between the pipe interior and the working space at the free end of the pipe ei can follow over the free pipe end, so that no high demands are placed on the pressure resistance of the cladding tube.
- the interior of the tube can be depressurized, so that no particularly complicated sealing is required on the receptacle formed for the pulse converter on the housing cover with passage leading to the tube interior.
- the cladding tube can be fixed with two open ends on a respective housing cover.
- the advantageous possibility opens that, starting from both open ends of the cladding tube, the waveguide of each sensor system extends over a respective part of the length of the measuring section within the cladding tube.
- the cover receiving the open end of the cladding tube may adjoin the oil-side working space.
- the connection for hydraulic oil can in this case, axially offset, be arranged on the cover next to the centrally arranged receptacle for the pulse transformer of the sensor system.
- the respective sensor system can be formed in an advantageous manner by a detachable from an open end of the cladding tube component with a preferably rollable, the waveguide tube-like surrounding, flexible-len sheath.
- one and the same magnetostrictive sensor system can be used to monitor the functioning of a plurality of piston accumulators by leaving the sensor system in the piston accumulator for only one measurement period and removing it from the piston accumulator after the end of the measurement period.
- a shortened longitudinal section of an embodiment of the piston accumulator according to the invention in comparison with Figure 1 enlarged view a longitudinal section of the piston of the piston accumulator according to the invention.
- a shortened drawn longitudinal section of a second embodiment of the piston accumulator according to the invention a shortened drawn longitudinal section of the embodiment of Fig. 3, but of the magnetostrictive Sensor system, only the outer sheath element is shown in the form of a cladding tube;
- FIG. 6 shows a shortened longitudinal section of the third embodiment, wherein the sensor system, only the outer casing element is shown in the form of a cladding tube;
- FIG. 7 shows a shortened drawn longitudinal section of a fourth embodiment
- FIG. 8 shows a shortened longitudinal section of the fourth exemplary embodiment, wherein only the outer envelope element in the form of a cladding tube is shown by the sensor system;
- FIG. 9 shows a shortened drawn longitudinal section of a fifth embodiment, wherein only the outer shell element is shown in the form of a cladding tube of the sensor system;
- FIG. 10 shows a longitudinal section of a sixth embodiment of the piston accumulator according to the invention
- Figures 11 and 12 are longitudinal sections of a seventh embodiment, wherein the sensor system is shown with its inner enveloping elements pulled out to different degrees from the outer casing element formed by a cladding tube
- FIG. 13 shows a shortened longitudinal section of an eighth embodiment of the piston accumulator according to the invention.
- the invention is illustrated by examples in which the piston accumulator is provided with a magnetostrictive measuring system.
- Fig. 1 3 shows an embodiment with an ultrasonic measuring system.
- embodiments of the piston accumulator according to the invention have a designated as a whole with 1 storage housing, which has a round hollow cylinder forming a cylinder tube 3 in all the embodiments shown as the main part. This is sealed at both ends by a screwed-in housing cover 5 and 7, between which a piston 9 along the housing longitudinal axis 1 1 is freely movable.
- the piston 9 separates a gas-working chamber 13, denate ⁇ compressible medium a working gas, such as Tsli; which is under a filling pressure, receives, from a working space 1 5, which receives an incompressible medium, such as hydraulic oil.
- a connection opening 1 7 coaxial with the longitudinal axis 1 1 is arranged in the adjoining the oil-side working space 1 5 housing cover 7.
- a filling channel 1 9, at the outer end of a filling valve 21 of the usual type is arranged, via the in the working space 1 3 a under a Filling pressure stationary filling amount of the working gas can be introduced.
- a sensor receptacle 23 is provided in the outer end portion has a seat 25 for a screw-in part of the pulse converter 26, and a through hole 27 through which the strand 29 of the cladding elements of the waveguide along the longitudinal axis 1 1 and extends through a passage 31 formed in the piston 9 through the length of the measuring section in the direction of the other housing cover 7.
- the strand 29 forms in this first embodiment according to the invention, the strand-like inner guide for the separating piston 9.
- FIG. 2 which shows the piston 9 enlarged in relation to FIG. 1, which corresponds approximately to the size of a practical embodiment, illustrates the details of the central passage 31.
- the piston 9 On its outer circumference, the piston 9, as usual in such accumulator piston for an external seal between the fluid and media spaces, recessed annular grooves 33 and 35 for piston seals, not shown, and offset towards them in the direction of the two axial end portions, flatter annular grooves 37th and 39 for also not shown guide rails
- the passage 31 has a through hole 51, which extends to the longitudinal axis 1 1 coaxial, starting from the bottom 43 to the piston end face.
- the bore 51 has a circular cylindrical extension 53, which forms the seat for an annular body 45 which is fixed in the extension 53 by screws 47 running parallel to the bore 51.
- Ring grooves 49 and 50 are formed in the unexpanded part of the bore 51 for sealing rings as part of the inner seal.
- the fixed in the extension 53 ring body 45 forms the support for serving as a position sensor permanent magnet device.
- This is formed by a magnetic ring 55 which is fixed at the flush with the bottom 43 free surface of the annular body 45 by gluing.
- the screws 47 and the annular body 45 are made of duroplastic plastic.
- FIG. 3 and 4 show a second embodiment of the piston accumulator according to the invention, in which the outer envelope element which surrounds the strand 29 forming shell elements, a cladding tube 57 is provided with its one, open end 59 on the gas side to the media room. 1 3 adjacent cover 5 by means of a soldered or welded connection 24, is set such that the open end 59 merges into the passage opening 27 of the sensor receptacle 23. At the opposite end 60, the cladding tube 57 is closed.
- a pressure-resistant formation of the H ⁇ lmly ⁇ - ⁇ - example we do not use the metallic ones
- the tube interior regardless of the prevailing in the work spaces 1 3, 1 5 accumulator pressure, depressurized, so that the seal on the seat 25 of the sensor receptacle 23 are no high demands.
- the smooth surface of the cladding tube 57 allows a smooth guiding of the piston 9 on the passage 31 and thereby an advantageous operating behavior of the piston accumulator.
- the cladding tube 57 forms the rod guide for the piston 9.
- FIGS. 5 and 6 differs from the example described above only in that the cladding tube 57 is also open at the end 60 which is adjacent to the adjacent to the oil-side working space 15 housing cover 7.
- the interior of the cladding tube 57 is pressure-balanced with respect to the working pressure of the accumulator, so that no pressure-resistant construction of the cladding tube 57 in the form of the rod guide is required. Therefore, besides a non-magnetic metal pipe, a plastic pipe can be used.
- 7 and 8 show a further embodiment in which the cladding tube 57 with its open end 60 does not end shortly before the oil-side connection opening 1 7 having the housing cover 7, but is added to this in a centrally continuous bore 61.
- an extension 54 is formed in the shape and size of the extension 53 in the piston. 9 equivalent.
- the annular body 45 by cross-end portion of the cladding tube 57 is sealed in the bore 61 by sealing rings 62 and 63.
- the connecting opening 1 7 provided for access to the oil-side working space 1 5 is arranged in this longitudinally displaced position in this longitudinal axis.
- the cladding tube 57 and open to the outside bore 61, the cladding tube 57 is again depressurized, so that on the seat 25 of the pulse converter 26 leading through hole 27 and the sensor receptacle 23 no particularly pressure-resistant sealing arrangement must be provided.
- pressure-resistant training of the seat 25 located on the seal assembly 64 may be provided at the the connection opening 1 7 having the housing cover 7, a fluid connection (not shown) between port 1 7 and bore 61, so that the cladding tube 57 in this embodiment in the interior Memory pressure leads and accordingly, as in the embodiment of Fig. 5 and 6, pressure-balanced.
- FIG. 9 shows an embodiment which corresponds to the embodiment of Figs. 3 and 4, except that a through hole 65 and seat 66 are provided for the pulse transformer 26, not shown in this figure on the oil-side housing cover 7, wherein the lid 7 fixed open end 60 opens into the passage opening 65.
- the connection opening 1 7 for the oil-side working space 1 5 radially offset to the longitudinal axis.
- FIG. 10 shows an embodiment with a storage housing 1 of great length.
- the construction of the gas-side housing cover 5 and the oil-side housing cover 7 respectively correspond to the cover construction of FIGS. 7 and 8, wherein the jacket tube 57 is fixed to these covers 5, 7 with both open ends.
- both the gas-side cover 5 a seat for forming a sensor receptacle 23 are provided, and on the oil-side cover 7.
- the stepped bore 61, FIG. 7 and 8, in the enlarged end portion 67 a seat for a second pulse transformer 28 are provided, and on the oil-side cover 7.
- the construction of the storage housing 1 corresponds to the example of FIGS. 3 and 4.
- the strand 29 containing the waveguide of the sensor system is flexible by means of enveloping elements formed from an elastomer. After pulling out of the jacket tube 57, which is closed at the free end 60 and thus pressureless, the strand 29, without interrupting the operation of the piston accumulator, be pulled out and rolled up when a relevant measurement period is completed.
- the sensor system can thereby be used for monitoring a plurality of piston accumulator, in which it is introduced via the located in the housing cover 5 through hole 27.
- the position transmitter is formed from a ferromagnetic material as a one-piece round body which is axially displaced from one another on both sides. opposite ends each have a flat circular disk 58, on the outer diameter of the position sensor is guided in the cladding tube 57 slidably.
- the discs 58 are integrally connected to one another via a reduced diameter connecting part 59.
- the axial distance of the discs 58 is adapted to the axial height of the magnetic ring 55 such that the end surfaces of the discs 58 are aligned with the axial end surfaces of the magnetic ring 55, so that an optimal magnetic flux is formed with the magnetic ring 55.
- the end surface of the disc 58 of the position sensor which faces the end 60 of the cladding tube 57, forms the reflection surface for from the end 60 forth in the cladding tube 57 incoming measuring radiation.
- Housing cover 7 has in the same way as is the case with the bore 51 at the passage 31 of the piston 9, a circular cylindrical extension 54, in which the same annular body 45, as he also used on the passage 31 of the piston 9 as a plastic body is taken up and secured by screws 47.
- the ring body 45 forms on the housing cover 7 a suitable enclosure of the inserted end portion of the cladding tube 57.
- the displacement measuring device has for the ultrasonic measurement method a transmitter / receiver 75, for the outer, extended bore portion 67 of the bore 61 in the oil-side Genzousede- disgust a 7 Seat forms.
- an ultrasonic transducer with a disk-shaped piezo-ceramic 78 extends into the end region of the tube 57 in order to carry out the distance determination to the reflection surface on the facing disc 58 of the position sensor 57.
- the transceiver 75 could also be arranged on the gas-side housing cover 5, wherein the End, end-side bore portion 73 of the through hole 27 could form the seat for the path measuring device.
- the position transmitter instead of the transmitter / receiver 75 for ultrasound, such could also be used for laser beams.
- the position transmitter then has on its upper side a reflecting surface for laser light, which reflects the laser light emitted by the transmitter 75 back to the receiver 75. From the runtime differences can then be the position of the piston 9 and possibly also its travel speed
- the magnetostrictive conductor in the form of the strand 29 can be inserted into the rod-like guide in the form of the hollow or jacket tube 57.
- Parts of a magnetic or inductive measuring system as shown in DE 103 10 427 A1 and DE 10 201 1090 050 A1, can also be accommodated in the pressure-tight rod-like guide in the form of the hollow or jacket tube 57.
- the rod-like guide is accommodated coaxially to the longitudinal axis 1 1 in the storage housing 1.
- the piston 9 by cross-leadership could also be arranged off-center to the longitudinal axis 1 1 parallel to the same in the storage housing 1.
- the acting between the guide rod and piston 9 sealing device 49, 50 is effective in each Anlagenschreib of the piston 9 and the two sealing rings, received in the annular grooves 49, 50 engage under attachment the pertinent guide rod.
- the two guided in the annular grooves 49, 50 sealing rings take in the direction of the longitudinal axis 1 1, a predetermined axial distance from one another and stabilize as part of the inner guide of the piston 9, the axial movement along the guide rod 29, 57th Die Abdicht Rhein 49, 50 is on the inner side of the home -Kölbens-9 and n viewing direction of diel- 'ig. Seen above ⁇ of the screwed into the piston 9 ring body 45 is arranged.
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)
- Length Measuring Devices Characterised By Use Of Acoustic Means (AREA)
- Length-Measuring Devices Using Wave Or Particle Radiation (AREA)
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016007798.0A DE102016007798A1 (en) | 2016-06-25 | 2016-06-25 | Hydropneumatic piston accumulator |
DE102016007824.3A DE102016007824A1 (en) | 2016-06-25 | 2016-06-25 | Hydropneumatic piston accumulator |
PCT/EP2017/000705 WO2017220196A1 (en) | 2016-06-25 | 2017-06-19 | Hydropneumatic piston accumulator |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3475584A1 true EP3475584A1 (en) | 2019-05-01 |
EP3475584B1 EP3475584B1 (en) | 2022-08-10 |
Family
ID=58544901
Family Applications (3)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17717082.6A Active EP3475583B1 (en) | 2016-06-25 | 2017-04-11 | Hydropneumatic piston accumulator |
EP23162104.6A Pending EP4230874A3 (en) | 2016-06-25 | 2017-04-11 | Hydropneumatic piston accumulator |
EP17731805.2A Active EP3475584B1 (en) | 2016-06-25 | 2017-06-19 | Hydropneumatic piston accumulator |
Family Applications Before (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17717082.6A Active EP3475583B1 (en) | 2016-06-25 | 2017-04-11 | Hydropneumatic piston accumulator |
EP23162104.6A Pending EP4230874A3 (en) | 2016-06-25 | 2017-04-11 | Hydropneumatic piston accumulator |
Country Status (4)
Country | Link |
---|---|
US (2) | US10781830B2 (en) |
EP (3) | EP3475583B1 (en) |
JP (2) | JP2019521294A (en) |
WO (2) | WO2017220179A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10781830B2 (en) * | 2016-06-25 | 2020-09-22 | Hydac Technology Gmbh | Hydropneumatic piston accumulator |
US20230375320A1 (en) * | 2020-09-25 | 2023-11-23 | Schenck Process Australia Pty Limited | Linear Displacement Transducer |
CN112762028B (en) * | 2021-01-18 | 2022-07-05 | 国家石油天然气管网集团有限公司华南分公司 | Voltage-stabilizing closed oil tank |
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KR102042745B1 (en) * | 2011-10-10 | 2019-11-27 | 앵거스 피터 롭슨 | Accumulator |
DE102011090050A1 (en) | 2011-12-28 | 2013-07-04 | Robert Bosch Gmbh | Method for determining a position of a piston in a piston accumulator by means of inductive sensors and suitably designed piston accumulator |
DE102012022871A1 (en) | 2012-11-22 | 2014-05-22 | Hydac System Gmbh | locking device |
US8939177B2 (en) * | 2013-03-15 | 2015-01-27 | Lsp Products Group, Inc. | In-line water hammer arrester |
DE102013009614A1 (en) | 2013-06-06 | 2014-12-11 | Hydac Electronic Gmbh | Ultrasonic displacement measuring system and method for ultrasonic displacement measurement |
DE102013014282A1 (en) | 2013-08-27 | 2015-03-05 | Hydac Electronic Gmbh | Position measuring system and method for determining position |
US20150285272A1 (en) * | 2014-04-08 | 2015-10-08 | Yokogawa Electric Corporation | Apparatus and methods for passive pressure modulation |
DE102014105154A1 (en) | 2014-04-11 | 2015-10-15 | Mhwirth Gmbh | Method for detecting the position and / or movement of a piston in a cylinder and cylinder arrangement |
US10781830B2 (en) * | 2016-06-25 | 2020-09-22 | Hydac Technology Gmbh | Hydropneumatic piston accumulator |
-
2017
- 2017-04-11 US US16/310,489 patent/US10781830B2/en active Active
- 2017-04-11 JP JP2018567180A patent/JP2019521294A/en not_active Withdrawn
- 2017-04-11 WO PCT/EP2017/000469 patent/WO2017220179A1/en unknown
- 2017-04-11 EP EP17717082.6A patent/EP3475583B1/en active Active
- 2017-04-11 EP EP23162104.6A patent/EP4230874A3/en active Pending
- 2017-06-19 US US16/310,878 patent/US10941789B2/en active Active
- 2017-06-19 EP EP17731805.2A patent/EP3475584B1/en active Active
- 2017-06-19 JP JP2018567701A patent/JP2019519739A/en not_active Withdrawn
- 2017-06-19 WO PCT/EP2017/000705 patent/WO2017220196A1/en unknown
Also Published As
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JP2019521294A (en) | 2019-07-25 |
US20190120257A1 (en) | 2019-04-25 |
US20200309158A1 (en) | 2020-10-01 |
EP4230874A3 (en) | 2023-08-30 |
JP2019519739A (en) | 2019-07-11 |
US10941789B2 (en) | 2021-03-09 |
WO2017220179A1 (en) | 2017-12-28 |
EP4230874A2 (en) | 2023-08-23 |
US10781830B2 (en) | 2020-09-22 |
EP3475584B1 (en) | 2022-08-10 |
WO2017220196A1 (en) | 2017-12-28 |
EP3475583C0 (en) | 2023-06-07 |
EP3475583A1 (en) | 2019-05-01 |
EP3475583B1 (en) | 2023-06-07 |
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