EP3728864A1 - Stellantrieb mit hydraulischem abflussverstärker - Google Patents
Stellantrieb mit hydraulischem abflussverstärkerInfo
- Publication number
- EP3728864A1 EP3728864A1 EP18830426.5A EP18830426A EP3728864A1 EP 3728864 A1 EP3728864 A1 EP 3728864A1 EP 18830426 A EP18830426 A EP 18830426A EP 3728864 A1 EP3728864 A1 EP 3728864A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic
- valve
- electro
- hydrostatic drive
- piston chamber
- 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
- F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
- F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D17/00—Regulating or controlling by varying flow
- F01D17/20—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted
- F01D17/22—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical
- F01D17/26—Devices dealing with sensing elements or final actuators or transmitting means between them, e.g. power-assisted the operation or power assistance being predominantly non-mechanical fluid, e.g. hydraulic
-
- 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
- F15B21/14—Energy-recuperation means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D21/00—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for
- F01D21/16—Trip gear
- F01D21/18—Trip gear involving hydraulic 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20561—Type of pump reversible
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/27—Directional control by means of the pressure source
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40507—Flow control characterised by the type of flow control means or valve with constant throttles or orifices
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/41—Flow control characterised by the positions of the valve element
- F15B2211/411—Flow control characterised by the positions of the valve element the positions being discrete
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
- F15B2211/41572—Flow control characterised by the connections of the flow control means in the circuit being connected to a pressure source and an output member
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/415—Flow control characterised by the connections of the flow control means in the circuit
- F15B2211/41581—Flow control characterised by the connections of the flow control means in the circuit being connected to an output member and a return line
-
- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/42—Flow control characterised by the type of actuation
- F15B2211/428—Flow control characterised by the type of actuation actuated by fluid pressure
Definitions
- the present invention relates to an actuator with variable speed pump, as he example, in steam turbines, gas turbines, die casting machines is used.
- EP 0 604 805 A1 discloses an actuating device for a hydraulic actuator with a pressure-proportional control signal, in which a piston-cylinder arrangement acting as a converter is interposed between the actuator and a hydraulic outflow amplifier.
- This device has, inter alia, the following disadvantages:
- the oil circuit is not closed Cru and requires a fairly large volume of oil.
- an external pressure supply is required for the function.
- An inventive electro-hydrostatic actuator has a driven by an electric motor volume and / or speed-variable hydraulic machine, to provide a volume flow of a hydraulic fluid. Furthermore, the actuator has a cylinder with a piston, a piston rod and a first piston chamber. In addition, a valve having a first position and a second position, which is movable from a first hydraulic actuator to the first position and from a second hydraulic actuator to the second position, wherein the second position controls a larger volume flow of the hydraulic fluid than the first position.
- the actuator has a sink, a main line which connects a first piston chamber of the cylinder with the sink and in which the hydromaschine is arranged, a secondary line which connects the first piston chamber with the sink and in the Valve is arranged, a first control line to the first hydraulic actuator, and a second control line to the second hydraulic actuator.
- the actuator is characterized in that in the main line in series with the hydraulic machine, a hydraulic resistor is arranged, the first control line is connected to the main line, and the second control line is connected between the hydraulic resistance and the first piston chamber.
- the cylinder can be used for example to control the hydraulics of a gas turbine or die casting machine.
- the hydraulic inflow or outflow is controlled by a closure, which is arranged on the piston rod of the cylinder.
- the sink is part of a closed hydraulic system. It can be realized, for example, as a closed to the environment reservoir. By realizing the actuator as a closed hydraulic system, the required oil volume compared to the prior art can be significantly reduced. This also reduces the risk to the environment - e.g. at a leakage of the system - reduced, because the smaller amount of oil, for. reduces the risk of fire or simplifies the measures to prevent pollution, because a smaller space is to be enclosed.
- the first piston chamber of the cylinder is filled by the hydraulic machine or pump via the main line.
- the hydraulic fluid is removed from the sink.
- the actuator has a secondary line, which has a higher, in particular a significantly higher, cross-section than the main line. This bypass connects the first piston chamber to the drain.
- a hydraulic valve is arranged in the secondary line.
- the valve can be realized in quite under different embodiments.
- the valve has a first position and a second position, wherein the second position has a larger one
- the valve may have a first "locked" position and a second "flow” position.
- the hydraulic valve is controlled by hydraulic actuators. It can be moved from a first hydraulic actuator to the first position and from a second hydraulic actuator to the first be movable second position.
- a first control line leads to the first hydraulic actuator and a second control line to the second hydraulic actuator.
- a hydraulic resistor is arranged in series with the hydraulic machine.
- the order of the arrangement plays a minor role; so either the hydro machine or the hydraulic resistance can be arranged closer to the sink.
- the first control line is connected to the main line, for example between the hydraulic resistance and the sink, and the second control line is connected between the hydraulic counterclaim and the first piston chamber. If the first piston chamber is to be emptied quickly ent, then the hydraulic machine first sucks the hydraulic fluid through the main line from the first piston chamber.
- the volume flow in the main pipe is gradually increased.
- an increased pressure in the second control line which is connected between the hydraulic resistance and the first piston chamber. Due to this increased pressure, the second hydraulic actuator moves the valve to the second position.
- the valve may thereby be moved from a first "locked” position to a second "flow” position.
- the first position "locked” may be the rest position of the valve in which the valve, e.g. by means of a valve spring, initially held. In this case, at least the counterforce of the spring must be overcome by the pressure on the second hydrau lic actuator.
- valve has been moved into the second position by means of the second hydraulic actuator increases the volume flow in the secondary line.
- the valve is moved from a first position "locked" to a second position "flow"
- the volume flow from the first piston chamber is increased almost by leaps and bounds.
- the actuating drive releases a hydraulic path that blocks the inflow or outflow, for example, the hydraulics of a gas turbine or die casting machine, very quickly.
- This effect can be further enhanced in some embodiments by arranging an energy store in or on the cylinder, e.g. in the form of a spring. This accelerates both the controlled inflow and outflow and the emptying of the first piston chamber.
- the first control line is connected between the hydraulic resistor and the hydraulic machine.
- hydraulic resistance is arranged between the hydraulic machine and the first piston chamber. This embodiment is preferably selected for actuators in which the hydraulic machine has only one pressure-resistant connection. The hydraulic resistance also acts as an instrument for pressure reduction.
- the first control line is connected between the hydraulic machine (50) and the first piston chamber (220).
- This embodiment is preferably selected for actuators, in which the hydraulic machine has two pressure-resistant connections.
- the hydraulic resistance is an orifice valve.
- An orifice valve is a well-established in the hydraulic, robust and easy-to-use component. It is available in various embodiments and can be so well adapted to the requirements, in particular so that the predefined volume flow, which triggers the switching of the valve can be determined quite accurately.
- the orifice valve may also be configured variably.
- the hydraulic resistance is integrated into the hydraulic machine. This allows in particular a particularly compact design of the actuator. In some embodiments, the hydraulic resistance may already be determined by the design of the actuator.
- Hydromachine be realized - e.g. if an internal resistance is realized - so that no additional component is required.
- the sink is a reservoir. This allows a cost-effective
- the reservoir is biased and designed in particular as a pressure accumulator. This ensures a particularly compact design of the actuator and saves energy when filling the first piston chamber.
- the drain is the second piston chamber of the cylinder, the cylinder being a synchronous cylinder.
- the synchronous cylinder does not have to have an exact ratio of 1: 1 from the first to the second piston chamber.
- the valve is a directional control valve, with the first position "locked" and the second position "flow".
- the valve can be realized as a 2/2-way valve.
- the valve has a plurality of positions, each with different cross sections. This is advantageous if the actuator is to realize a more complex control, e.g. a fast, yet soft control of the hydraulic inflow or outflow of the controlled device.
- the valve can steplessly switch between several positions, each with a different volume flow of the hydraulic fluid.
- “Stepless” can also mean “very small steps”. Again, this is an advantageous way to realize more complex controls.
- the valve has the "locked" position as the rest position, in which it is held by a particular spring, in particular.
- a particular spring in particular.
- the accidental activation e.g. the accidental opening of the valve largely prevented.
- the switching pressure of the valve can be precisely adjusted.
- the cylinder further comprises an energy store and / or is connected to an energy store.
- the energy storage device may be a spring, for example. This can be arranged in the second piston chamber or in front of the first piston chamber. With such an energy storage, the reaction speed of the actuator is significantly increased.
- a further hydraulic resistance in particular an orifice valve, arranged. This provides for a defined maximum volume flow when the hydraulic fluid is drained quickly from the first piston chamber, i. in particular when the valve is - at least for some embodiments - in the second position "flow".
- a check valve is disposed parallel to the hydraulic resistor.
- the cylinder further has an end position damping in the first piston chamber.
- a robust elastic material is used. This is particularly advantageous when the energy storage is designed as a spring. In such a case, the piston of the cylinder can impinge very hard on the inner wall of the cylinder and thus, at least in the medium term, cause damage to the cylinder. This is prevented by the end position damping.
- An inventive system is equipped with an electro-hydrostatic drive as described above.
- the cylinder controls, at least for some embodiments, a process valve, e.g. for a steam valve or a cast piston.
- An inventive system or an electro-hydrostatic drive is used for steam turbines, gas turbines, die casting machines or plastic injection molding machines.
- Fig. 1 A circuit diagram of an actuator according to the invention
- Fig. 3 Another variant of an actuator according to the invention.
- Fig. 1 shows a cylinder 200, the piston rod 230 at one end an actuator, namely a shutter 290, as used in particular for steam turbines, gas turbines, die casting machines or plastic injection molding machines.
- the closure 290 controls the opening of a conduit or passage 420 in one of said devices, which branches off from another conduit or passage 410. In some modes of operation, the opening to passage 420 should be closed very quickly. In the embodiment shown, this is done by emptying the first piston chamber 220 very quickly and releasing the spring 250 very quickly.
- the spring 250 is disposed within the second piston chamber 240 in this embodiment.
- the spring 250 acts as an energy store.
- the second piston chamber 240 may be open.
- the hydraulic machine or pump 50 initially pumps via the pressure lines 130 (which form part of the pressure line 110) also used) and 160 hydraulic fluid from the first piston chamber 220.
- the 2/2-way valve 100 is initially in the "locked" position. This is the rest position of the valve 100 and is ensured in this embodiment by a valve spring 108.
- the volume flow which thereby arises in the pressure line 130, causes a pressure difference between a first and a second side of the orifice valve 180, ie there is a higher pressure on the side of the orifice valve 180, which points in the direction of the first piston chamber 220. Consequently, a higher pressure also arises in the pressure line 140, which controls the actuator 102.
- the pressure is propor tional to the volume flow generated by the pump 50.
- the pressure in the conduit 140 is so high that the force of the valve spring 108 is overcome and the actuator 102 switches the valve 100 to the "flow" position.
- the hydraulic fluid can flow out of the first piston chamber 220 very quickly.
- the hydraulic fluid flows into the reservoir 190, which may be designed as a pressure chamber.
- the closed system advantageously allows a very compact design and requires a significantly lower volume of hydraulic fluid than in the prior art.
- the valve 100 is closed either by the valve spring 108 when the volume flow falls below a predefined level. Or the valve 100 is closed by the hydraulic machine 50 when the hydraulic machine 50 pumps the hydraulic fluid from the reservoir 190, via the lines 160 and 130, into the first piston chamber 220. This creates a higher pressure on the actuator 104, which switches the valve 100 in the "locked" position.
- the pump 50 is preferably realized as a volume and / or variable speed hydraulic machine 50 driven by an electric motor 60.
- FIG. 2 shows another embodiment of an actuator according to the invention.
- the basic function is the same as explained for Fig. 1.
- the same reference numerals designate the same elements as in Fig. 1.
- Fig. 2 has other elements that are advantageous for certain scenarios.
- FIG. 2 shows a pressure line 330, which connects the reservoir 190 and the second pump connection 52 to the second piston chamber 240.
- the spring 250 may be dispensed with.
- This variant has the advantage that the reservoir 190 can be made smaller because the second piston chamber 240 can accommodate a part of the hydraulic fluid flowing out of the first piston chamber 220.
- Fig. 2 shows a check valve 360 in the pressure line 310, which opens when the first piston chamber 220 is filled with the hydraulic fluid.
- the check valve 360 is disposed in parallel with the orifice valve 180. With the check valve 360 so the shutter valve 180 is bypassed, so that a faster filling of the first piston chamber 220 is possible.
- FIG. 2 also shows a check valve 370 arranged in parallel with the hydraulic machine 50.
- the check valve 370 opens when the first piston chamber 220 is deflated. Because most of the hydraulic fluid flows through the lines 110 and 120, the pump 50 may be undersupplied with hydraulic fluid. In some types of pumps, this can damage the pump. In order to avoid this, hydraulic fluid is conducted from the line 120 into the pump 50 via the check valve 370.
- an orifice valve 170 is disposed in the conduit 120. It is also possible to arrange the shutter valve 170 in line 110, preferably hydraulically in the vicinity of the valve 100. Thus, the maximum flow through the lines 110 and 120 is not determined by the cross section of these lines, but can be much more precise by the dimensioning of the Shutter valve 170 can be determined.
- a cushion end 270 is disposed in the first piston chamber 220 - in the region of the end, which is opposite to the spring 250. If the energy storage device, as in this embodiment, is designed as a spring 250, the piston of the cylinder can impinge very hard on the inner wall of the cylinder and thus, at least in the medium term, cause damage to the cylinder. This is avoided with the end cushioning 270 shown.
- Fig. 3 shows a further variant of an actuator according to the invention.
- the valve 100 has the rest position "locked”.
- a pressure builds up which is so high that the force of the valve spring 108 is overcome and the actuator 104 the valve 100 in the Position "Flow" switches.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
- Details Of Reciprocating Pumps (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102017131004.5A DE102017131004A1 (de) | 2017-12-21 | 2017-12-21 | Stellantrieb mit hydraulischem Abflussverstärker |
| PCT/EP2018/085037 WO2019121416A1 (de) | 2017-12-21 | 2018-12-14 | Stellantrieb mit hydraulischem abflussverstärker |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP3728864A1 true EP3728864A1 (de) | 2020-10-28 |
| EP3728864B1 EP3728864B1 (de) | 2022-01-19 |
Family
ID=65003344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP18830426.5A Active EP3728864B1 (de) | 2017-12-21 | 2018-12-14 | Stellantrieb mit hydraulischem abflussverstärker |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US11053957B2 (de) |
| EP (1) | EP3728864B1 (de) |
| CN (1) | CN111566357B (de) |
| DE (1) | DE102017131004A1 (de) |
| WO (1) | WO2019121416A1 (de) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP4375517A1 (de) * | 2022-11-28 | 2024-05-29 | Scanwill ApS | Hydraulisches vorschaltgerät für einfachwirkenden hydraulikzylinder |
| FR3143072A1 (fr) * | 2022-12-13 | 2024-06-14 | Safran Power Units | Actionneur, turbomachine et aéronef comprenant un tel actionneur, et procédé d’actionnement correspondant |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3469777D1 (en) * | 1983-05-30 | 1988-04-14 | Bbc Brown Boveri & Cie | Electro-hydraulic actuator for turbine valves |
| US5137253A (en) * | 1989-12-01 | 1992-08-11 | Asea Brown Boveri Ltd. | Actuator |
| CH681380A5 (de) * | 1990-04-09 | 1993-03-15 | Asea Brown Boveri | |
| DE4244304A1 (de) * | 1992-12-28 | 1994-06-30 | Asea Brown Boveri | Betätigungsvorrichtung für einen hydraulischen Stellantrieb mit druckproportionalem Stellsignal |
| SE531309C2 (sv) * | 2006-01-16 | 2009-02-17 | Volvo Constr Equip Ab | Styrsystem för en arbetsmaskin och förfarande för styrning av en hydraulcylinder hos en arbetsmaskin |
| US20090283160A1 (en) * | 2008-05-02 | 2009-11-19 | James Fishwick | Fluid flow control device and control circuit |
| JP5214575B2 (ja) * | 2009-10-20 | 2013-06-19 | カヤバ工業株式会社 | 電動液圧アクチュエータ |
| EP2637852B1 (de) * | 2010-11-11 | 2017-01-18 | Robert Bosch GmbH | Hydraulische achse |
| EP2620655A1 (de) * | 2012-01-30 | 2013-07-31 | Siemens Aktiengesellschaft | Antriebssystem für ein Ventil |
| EP2711560B1 (de) * | 2012-09-21 | 2019-06-12 | HAWE Hydraulik SE | Hydraulikantrieb für ein hydraulisch betätigbares Werkzeug |
| DE102014226666B3 (de) * | 2014-12-19 | 2015-12-24 | Voith Patent Gmbh | Stellantrieb für ein Regelventil, insbesondere Dampfturbinenregelventil und Verfahren zum Betreiben desselben |
-
2017
- 2017-12-21 DE DE102017131004.5A patent/DE102017131004A1/de not_active Withdrawn
-
2018
- 2018-12-14 EP EP18830426.5A patent/EP3728864B1/de active Active
- 2018-12-14 US US16/772,246 patent/US11053957B2/en active Active
- 2018-12-14 WO PCT/EP2018/085037 patent/WO2019121416A1/de not_active Ceased
- 2018-12-14 CN CN201880079298.6A patent/CN111566357B/zh active Active
Also Published As
| Publication number | Publication date |
|---|---|
| DE102017131004A1 (de) | 2019-06-27 |
| US11053957B2 (en) | 2021-07-06 |
| CN111566357B (zh) | 2022-06-17 |
| US20210095698A1 (en) | 2021-04-01 |
| WO2019121416A1 (de) | 2019-06-27 |
| CN111566357A (zh) | 2020-08-21 |
| EP3728864B1 (de) | 2022-01-19 |
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