WO2015185619A2 - Vanne multivoies, en particulier vanne à 6/2 voies, et agencement de vannes multivoies - Google Patents

Vanne multivoies, en particulier vanne à 6/2 voies, et agencement de vannes multivoies Download PDF

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Publication number
WO2015185619A2
WO2015185619A2 PCT/EP2015/062370 EP2015062370W WO2015185619A2 WO 2015185619 A2 WO2015185619 A2 WO 2015185619A2 EP 2015062370 W EP2015062370 W EP 2015062370W WO 2015185619 A2 WO2015185619 A2 WO 2015185619A2
Authority
WO
WIPO (PCT)
Prior art keywords
valve
multiway
control piston
valves
hydraulic
Prior art date
Application number
PCT/EP2015/062370
Other languages
German (de)
English (en)
Other versions
WO2015185619A3 (fr
Inventor
Matthias Leykauf
Original Assignee
Voith Patent Gmbh
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 Voith Patent Gmbh filed Critical Voith Patent Gmbh
Publication of WO2015185619A2 publication Critical patent/WO2015185619A2/fr
Publication of WO2015185619A3 publication Critical patent/WO2015185619A3/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/02—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit
    • F16K11/06—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements
    • F16K11/065—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members
    • F16K11/07—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with all movable sealing faces moving as one unit comprising only sliding valves, i.e. sliding closure elements with linearly sliding closure members with cylindrical slides
    • 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
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/0401—Valve members; Fluid interconnections therefor
    • F15B13/0402—Valve members; Fluid interconnections therefor for linearly sliding valves, e.g. spool valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K11/00—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves
    • F16K11/10—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit
    • F16K11/20—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members
    • F16K11/22—Multiple-way valves, e.g. mixing valves; Pipe fittings incorporating such valves with two or more closure members not moving as a unit operated by separate actuating members with an actuating member for each valve, e.g. interconnected to form multiple-way valves
    • 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
    • F01D21/14—Shutting-down of machines or engines, e.g. in emergency; Regulating, controlling, or safety means not otherwise provided for responsive to other specific conditions
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
    • F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
    • F05D2270/00—Control
    • F05D2270/60—Control system actuates means
    • F05D2270/64—Hydraulic actuators

Definitions

  • Multi-way valve in particular a 6/2-way valve
  • the invention relates to a hydraulic multi-way valve, consisting essentially of a valve housing, at least one integrated in the valve housing valve chamber, an actuating mechanism, a movable by the actuating mechanism and arranged in the valve chamber control piston, and inflows and outflows, in particular inlet and Abiaufbohrept , which are at least partially or completely shut off or released by the position of the control piston.
  • the invention further relates to a multi-way valve arrangement and a hydraulic control device with a multi-way valve arrangement.
  • Steam turbines for example in power plants, in which live steam is expanded from a boiler and thereby drives one or more turbine stages, must not exceed certain maximum speeds, in particular to prevent damage to the turbine components.
  • a clutch breakage or the like it is known for example from DE 102004042891 B3 to provide a quick-closing valve that interrupts or reduces the steam mass flow to the turbine in the shortest possible time, if, for example the turbine speed exceeds a predetermined threshold or in any other way an imminent exceeding of the maximum speed is detected.
  • a quick-acting valve has a working cylinder or actuator which is vented by a hydraulic pressure against a biasing element, such as a spring, to actively open the quick-acting valve as long as the hydraulic pressure overcomes the bias of the biasing element.
  • a biasing element such as a spring
  • this hydraulic pressure is reduced as quickly as possible, for example, shut down in a tank.
  • the non-pressurized working cylinder is forced by the biasing member in the closed position of the quick-closing valve.
  • find row arrangements of two-way slide valves use, which can be brought with appropriate switching magnets in the necessary respectively for the opening and closing of the quick-closing valve position.
  • a redundant arrangement causes actuation of the quick-acting valve when at least two two-way slide valves are actuated.
  • DE 102004042891 B3 discloses a control device for a quick-closing valve of a steam turbine with a module for reducing a hydraulic pressure by rapidly opening a discharge valve, wherein a control valve arrangement is provided with at least three safety directional valves, which are hydraulically connected so that the first quick-closing valve Close when at least two safety valves of the control valve assembly have moved to a quick-closing position.
  • the control device is designed such that the hydraulic pressure can be reduced almost abruptly when a defined event occurs.
  • 2oo3 circuit two out of three.
  • DE 102011082599 A1 shows a valve arrangement, as it can be used for example for turbines. This valve assembly has 2oo3 logic.
  • a first, a second and a third pilot valve are provided, wherein each of these Vorschaltventile controls two safety valves.
  • the valve arrangement is characterized in that the safety valve is divided into inlet and outlet valves and These are coupled such that the inlet and outlet valves are connecting branches across.
  • the inlet valves and two of the drain valves are connected in series with one another in order to jointly form the connecting branches.
  • three ball valves are each assigned two inlet valves and two drain valves.
  • an arrangement is provided in which one of the two inlet valves and one of the two drain valves in the first connection branch and the other inlet valve and the other drain valve are arranged in the further connection branch, but the other drain valve is fed to the first connection branch.
  • the current operation must be interrupted or at least waived the so-called TRIP function.
  • the TRIP function consists, for example, of immediately switching off a steam turbine in an emergency. Three safety valves are switched. The triggering takes place via a 2oo3 (two out of three) circuit. This means that the control liquid is shut off for rapid shutdown by actuation of at least two safety directional valves.
  • the document EP 0433 791 A1 discloses an embodiment with three safety valves in the form of safety-way valves and in each case the safety valves associated solenoid valves for actuating this known. In case of failure of one of the safety valves can be maintained by ab interviewedn the associated actuating valve, the operation anyway.
  • the actuation valves can not decouple the flow P of the safety valve. They serve only as an actuator of the safety valve and replacement of a safety valve during operation is also not possible.
  • the object of the invention is to develop a multi-way valve for indirect control of the quick-closing valve, that a simple cost-effective design can be realized. Furthermore, a multi-way valve for a control device with a quick-closing valve for the operation of a turbine is to provide, in the case of failure of a safety valve, the safety valve can be replaced during operation.
  • valve housing integrated in the valve housing and extending along a longitudinal axis
  • Valve chamber movable and arranged in the valve chamber control piston for the realization of at least two valve positions
  • valve housing in each case three Inlets and three processes are provided and the control piston has piston surfaces for cooperation with the valve chamber, in particular the inner peripheral surfaces for coupling and / or blocking the connections between the individual inlets and outlets via the valve chamber, wherein the control piston viewed in the direction of the longitudinal axis of the valve chamber at least consists of two interconnected sub-pistons and each of the sub-piston has on its outer circumference a sealing surface region which shuts off in cooperation with a valve housing arranged in the valve seat in each case a valve position at least one outlet of the valve chamber.
  • the solution according to the invention makes it possible to provide a multi-way valve, in particular a 6 / x-way valve, preferably a 6/2-way valve for use in control devices for actuating quick-acting valves, in particular for use in power plants.
  • a multi-way valve in particular 6 / x-way valve, preferably a 6/2-way valve for use in control devices for actuating quick-acting valves, in particular for use in power plants.
  • the formation of the sealing surface areas of these is ensured for the interaction with a valve seat of the valve chamber with a simple design.
  • a multi-way valve, in particular 6/2-way valve as a feed valve for a safety valve in particular safety directional valve can in a hydraulic control device for a quick-closing valve of a steam turbine with redundant valve arrangement, a hydraulic decoupling or shutting off the respective safety valve during operation, i.
  • the pilot valve which is assigned to the defective safety valve, spent in a valve position in which the downstream safety valve can be removed, but still the pending pressure is passed, so that the current operation is not interrupted.
  • a preferred application is the use in a hydraulic control device with a module for reducing a hydraulic pressure by rapidly opening a discharge valve and / or unloading or loading an actuator for actuating the quick-closing valve, wherein in a Radioffenerss- and / or guide system, a control valve arrangement is provided with at least three safety valves, which are connected hydraulically such that they open the outflow valve or the actuator load or load, if a safety circuit by at least two safety valves of the control valve arrangement have moved into a quick-closing position.
  • each safety valve is independent of the other safety valves Vorschaltventil connected upstream hydraulically, such that a respective Vorschaltventil downstream safety valve during operation is hydraulically decoupled from this.
  • Hydraulic precedence is understood as an upstream arrangement viewed in the flow direction from a pressure source to a pressure sink.
  • "Hydraulically coupled” or “decoupled” includes in particular hydraulically directly or indirectly connected via further connecting channels, lines, rooms or intermediate components or ensuring or blocking a fluid connection.
  • the individual sub-pistons of the control piston are preferably detachably connected to each other for assembly and disassembly purposes, wherein the connection can be non-positively or positively formed.
  • the control device for the control piston can be performed manually operable in the preferred application in which the multi-way valve according to the invention only 2- switching positions, especially if the number of actuation is low, such as in control devices with safety valves in the case of replacement of such a safety valve.
  • the multi-way valve according to the invention is designed such that in the longitudinal direction of the control piston this is supported with an end portion in the valve housing via at least one energy storage device, in particular spring unit and the actuator is arranged acting on the other end.
  • the invention provides to combine them in a hydraulic multi-way valve assembly with at least two, preferably three multi-way valves, the multi-way valves each having a valve housing, a valve housing integrated in the valve chamber, arranged in the individual valve chamber, along a longitudinal axis of the valve chamber movable Control piston for realizing at least two valve positions and an actuating mechanism per valve chamber include. Furthermore, associated with a single valve chamber inlets and outlets are provided, which are at least partially shut off or released by the position of the control piston.
  • each individual multi-way valves are combined to form a structural unit, wherein at least one fluid connection between the valve chambers of the individual multi-way valves is provided and each individual actuating mechanism comprises an adjusting element, which in each case transfers the control piston of a multi-way valve from a first position I to a further position II or vice versa ,
  • the basic idea is to arrange a plurality of valves, which provide for a corresponding redundancy, in a valve housing.
  • the summary of a multi-way valve assembly in the form of a structural unit has the advantage of providing them as a compact and easy to handle unit and easy to integrate into systems. Required brackets are easy to fix. Furthermore, the hydraulic connection can be made compact in a small space.
  • the present basic idea further pursues a hydraulic triple redundancy which protects against unwanted and consequently expensive shutdowns of the turbine.
  • the new device is a supplement to the electronic speed monitoring. It is characterized by a threefold redundancy of the module. The designation is marked "2oo3" - two out of three (two out of three). It avoids turbine damage caused by turbines in overspeed, should the load to be driven suddenly disappear. As it is with such Damage can also be dangerous for people and the environment, steam turbines are subject to high safety requirements. This includes in particular a reliable shutdown of the turbine in an emergency. At an overspeed of, for example, ten percent triggers an electronic overspeed protection.
  • the device is equipped with three identical solenoids with slide valves - preferably arranged in series 6/2-way valves - and immediately controls the pressure oil of a hydraulic cylinder with return spring.
  • the spring return closes the quick-closing valve in less than 0.3 seconds and stops the process. If this process is triggered by mistake, for example due to a faulty cable break, unnecessary and, above all, expensive downtimes occur. Just such a device protects.
  • the safety device can be tested during operation without causing interruption and allows the replacement of electrical components during operation.
  • the invention sees the three 6/2 - way valves in parallel as upstream shut-off of safety valves.
  • the three way valves are advantageously arranged in a common valve housing.
  • a hydraulic multi-way valve consists essentially of the said valve housing, a plurality of valve housings integrated in the valve chambers, each an actuating mechanism, a movable by the actuating mechanism and arranged in the valve chamber control piston, and inlet and Abiaufbohrept, by the position of the control piston, a first or assume a further position and at least partially within the valve housing via the valve chamber fluidly coupled to each other.
  • valve housing thus a plurality of valve chambers are arranged, wherein at least one fluid connection between the valve chambers is provided.
  • an adjusting element is provided as the actuating mechanism, the each transferred the control piston from a first position I to another position II.
  • the operating mechanism provided for this purpose consists of a spring which cooperates with the control piston of the multi-way valve and an adjusting element interacting with the control piston and arranged opposite the spring. By transferring position I to position II is moved by a relative movement, the adjustment against the force of the spring acting.
  • the actuating element can preferably be operated by hand, for example with a commercially available tool.
  • valve chambers are such that their longitudinal axes are arranged to run parallel to each other and the individual complementary terminals, ie respective inlets and outlets preferably each lie on a common theoretical connection line.
  • the interaction of valve chamber and control piston with respect to the first position I of a multiway valve causes the first inlet bore Z1 are fluidly connected to the Abiaufbohrung A2, the second inlet bore Z3 with the Abiaufbohrung A4, and the inlet bore Z5 and the Abiaufbohrung A6 are locked.
  • the multi-way valve consisting of a defined number of preferably 6/2-way valves thus has a common valve housing, which can be coupled in a flange to a valve block such that the respective inlet bores and Abiaufbohritch the valve housing control lines can be for the control block. This eliminates the need for additional control lines.
  • the manual operation also makes it easy to operate the multi-way valve. Due to a single valve housing a compact design is given, which can be easily attached to other control blocks or control modules flange.
  • Fig. 1 is a schematic representation of the function of the multi-way valve
  • Fig. 2 shows a section through the multi-way valve of FIG. 1 in a first
  • Fig. 3 is a section through the multi-way valve of FIG. 1 in a second
  • FIGS. 4 shows a longitudinal section through the multi-way valve, according to FIGS. 1 to 3;
  • Fig. 5 is a perspective view of the multi-way valve according to FIGS.
  • Fig. 6 is a perspective view of the multi-way valve together with a control module.
  • FIGS. 4 and 5 show a multiway valve arrangement 1 according to the invention.
  • This consists of three multi-way valves 3 (individually in Figs. 4-6 as 6/2-way valve with the reference numerals 3.1, 3.2, 3.3), which are connected in parallel to each other, the upstream shut-off of safety valves 10 of a hydraulic control device 12, as shown for example in Figure 6 serve for a quick-closing valve, not shown here.
  • Such a multi-way valve 3 is shown schematically in Fig. 1 as a 6/2-way valve.
  • the illustrated in Fig. 1 6/2-way valve 3 has three inlets, in particular Zulaufbohritch Z1, Z3 and Z5 and three processes, in particular Abiaufbohritch A2, A4 and A6 and is designed such that it can optionally take one of the two possible positions I (Fig. 2) and II (Fig. 3).
  • the control piston 5 has according to the invention piston surfaces for cooperation with the inner peripheral surfaces of the valve chamber 4 for coupling and / or blocking the connections between the individual inlets and outlets Z1, Z3, Z5, A2, A4 and A6 via the valve chamber 4, wherein the control piston. 5 viewed in the direction of the longitudinal axis of the valve chamber 4 at least two interconnected sub-piston 5.1, 5.2 and each of the sub-piston 5.1, 5.2 at its outer periphery a sealing surface area 13.1, 13.2, which in cooperation with a valve housing 2 arranged in the valve seat 14.1, 14.2 in each case a valve position I or II shuts off at least one outlet A2, A4 or A6 of the valve chamber 4.
  • Such a hydraulic multi-way valve arrangement 1 consists essentially of said valve housing 2, three valve chambers 4 integrated in the valve housing 2, three actuating mechanisms 6, one each by the actuating mechanism 6 movable and arranged in the valve chamber 4 at least two part pistons 5.1 and 5.2 formed control piston fifth , as well as said inlet bores Z1, Z3, Z5 and the Abiaufbohrept A2, A4, A6, which occupy a position corresponding to the position of the control piston 5.
  • the valve chambers 4 are fluidly connected by at least one connection 7.
  • the actuating mechanism 6 consists of an adjusting element 6.2 and a spring element 6.1.
  • the control piston 5 extends into the one side of the valve chamber 4, on which the control piston 5 is connected to the adjusting element 6.2 in connection to the other side of the valve chamber 4, on which the control piston 5 is coupled to the spring element 6.1 and thus along the longitudinal axis L of the valve chamber 4.
  • the Control piston 5 is round in its cross section and has different sections with different cross sections. These cross sections are used to lock or open the supply lines Z1, Z3, Z5 and the Abiaufbohritch A2, A4, A6 accordingly.
  • the respective positions I and II are shown in FIGS. 2 and 3, wherein the direction of flow of the open supply and discharge lines is indicated by arrows.
  • the adjusting element 6.2 is provided, which in each case transfers the control piston 5 from a first position I to a further position II against the spring force of the spring element 6.1.
  • the adjusting element 6.2 can preferably be operated by hand, for example with a commercially available tool.
  • valve chamber 4 and control piston 5 with respect to the first position I of a 6/2-way valve causes the first inlet bore Z1 with the
  • the second inlet bore Z3 are fluidly connected to the Abiaufbohrung A4, and the inlet bore Z5 and the Abiaufbohrung A6 are locked.
  • the individual multi-way valves 3.1 to 3.3 are here individually and independently operable.
  • valve housing 2 is closed by a closure element 15, which is designed here as a cover element and all three valve chambers 4 of the multi-way valve assembly 1 is closed.
  • the guide for the respective adjusting element 6.2 of the actuating mechanisms 6 is integrated in this closure element 15.
  • the multi-way valve 1, consisting of a defined number of preferably 6/2-way valves has a common valve housing 2, the flange to a valve block 8 (FIG. 6) can be coupled such that the respective inlet bores and Abiaufbohritch the valve housing 2 control lines for may be the valve block 8.
  • valve housing 2 designed as a flange of the multi-way valve 1 is preferably designed as a rectangular body element.
  • the drain lines A2, A4, A6 correspond to corresponding supply lines in the valve block 8, on which the safety valves 10 of a control device 12 are arranged, for example, a quick-closing valve of a steam turbine arrangement, not shown here.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Fluid-Driven Valves (AREA)
  • Multiple-Way Valves (AREA)

Abstract

L'invention concerne une vanne hydraulique multivoies, qui se compose essentiellement d'un boîtier de vanne, d'au moins une chambre de vanne intégrée dans le boîtier de vanne et longeant un axe longitudinal, un mécanisme d'actionnement, un piston distributeur pouvant être déplacé par le mécanisme d'actionnement et destiné à réaliser au moins deux positions de vanne, des arrivées et sorties reliées à la chambre de vanne, qui peuvent être respectivement bloquées ou libérées au moins partiellement par la position du piston distributeur. Selon l'invention, trois arrivées (Z1, Z3, Z5) et trois sorties (A2, A4, A6) se trouvent respectivement sur le boîtier de vanne (2), et le piston distributeur (5) comporte des surfaces de piston destinées à coopérer avec les surfaces circonférentielles intérieures de la chambre de vanne (4) afin de coupler et/ou bloquer les liaisons entre chaque arrivée et sortie (Z1, Z3, Z5, A2, A4, A6) par le biais de la chambre de vanne (4). Le piston distributeur (5), vu dans la direction de l'axe longitudinal (L) de la chambre de vanne (4), se compose au moins de deux pistons partiels (5.1, 5.2) reliés entre eux et chacun des pistons partiels (5.1, 5.2) comporte une zone de surface d'étanchéité (13.1, 13.2) sur sa circonférence extérieure. Cette zone de surface d'étanchéité bloque au moins une sortie (A2, A4, A6) de la chambre de vanne (4) en coopération avec un siège de vanne (14.1, 14.2) disposé dans le boîtier de vanne (2) dans une position de vanne (I, II) respective.
PCT/EP2015/062370 2014-06-03 2015-06-03 Vanne multivoies, en particulier vanne à 6/2 voies, et agencement de vannes multivoies WO2015185619A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102014210415 2014-06-03
DE102014210415.7 2014-06-03

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WO2015185619A2 true WO2015185619A2 (fr) 2015-12-10
WO2015185619A3 WO2015185619A3 (fr) 2016-03-03

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WO (1) WO2015185619A2 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9897113B2 (en) * 2016-05-02 2018-02-20 Hallco Industries, Inc. Switching valve control system
CN108502816B (zh) * 2018-05-08 2023-07-14 安徽合力股份有限公司 旁通式能量再生叉车液压系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0433791A1 (fr) 1989-12-21 1991-06-26 Asea Brown Boveri Ag Actuateur pour une valve d'alimentation
DE102004042891B3 (de) 2004-08-31 2005-10-06 Hydac System Gmbh Sicherheitsschaltung für medienbetriebene Verbraucher und Verfahren zum Betrieb derselben
DE102011082599A1 (de) 2011-09-13 2013-03-14 KEICHER Hydraulik UG Ventilanordnung, Verwendung, Turbine und Kraftwerk

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Publication number Priority date Publication date Assignee Title
SE9501794L (sv) * 1995-05-15 1996-08-19 Nordwin Ab Hydraulisk riktningsventil
WO2009088504A1 (fr) * 2008-01-07 2009-07-16 Vanderbilt University Ensemble électrovanne
JP5316263B2 (ja) * 2009-06-30 2013-10-16 株式会社ジェイテクト 電磁弁
DE102009050007A1 (de) * 2009-10-21 2011-05-05 Alpha Fluid Hydrauliksysteme Müller GmbH Hydraulische Parallelweiche
JP5543236B2 (ja) * 2010-02-10 2014-07-09 東芝機械株式会社 建設機械の油圧制御弁
CN101893011A (zh) * 2010-07-30 2010-11-24 三一重工股份有限公司 液压阀、液压阀组及其控制方法

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0433791A1 (fr) 1989-12-21 1991-06-26 Asea Brown Boveri Ag Actuateur pour une valve d'alimentation
DE102004042891B3 (de) 2004-08-31 2005-10-06 Hydac System Gmbh Sicherheitsschaltung für medienbetriebene Verbraucher und Verfahren zum Betrieb derselben
DE102011082599A1 (de) 2011-09-13 2013-03-14 KEICHER Hydraulik UG Ventilanordnung, Verwendung, Turbine und Kraftwerk

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WO2015185619A3 (fr) 2016-03-03

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