EP2981458A1 - Rudermaschine - Google Patents
RudermaschineInfo
- Publication number
- EP2981458A1 EP2981458A1 EP14712692.4A EP14712692A EP2981458A1 EP 2981458 A1 EP2981458 A1 EP 2981458A1 EP 14712692 A EP14712692 A EP 14712692A EP 2981458 A1 EP2981458 A1 EP 2981458A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hydraulic
- cylinder
- pump
- chamber
- rowing machine
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/06—Steering by rudders
- B63H25/08—Steering gear
- B63H25/12—Steering gear with fluid transmission
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H20/00—Outboard propulsion units, e.g. outboard motors or Z-drives; Arrangements thereof on vessels
- B63H20/08—Means enabling movement of the position of the propulsion element, e.g. for trim, tilt or steering; Control of trim or tilt
- B63H20/12—Means enabling steering
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/06—Steering by rudders
- B63H25/08—Steering gear
- B63H25/14—Steering gear power assisted; power driven, i.e. using steering engine
- B63H25/18—Transmitting of movement of initiating means to steering engine
- B63H25/22—Transmitting of movement of initiating means to steering engine by fluid means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/06—Steering by rudders
- B63H25/08—Steering gear
- B63H25/14—Steering gear power assisted; power driven, i.e. using steering engine
- B63H25/26—Steering engines
- B63H25/28—Steering engines of fluid type
- B63H25/30—Steering engines of fluid type 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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
- F15B1/025—Installations or systems with accumulators used for thermal compensation, e.g. to collect expanded fluid and to return it to the system as the system fluid cools down
-
- 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
- F15B21/04—Special measures taken in connection with the properties of the fluid
- F15B21/045—Compensating for variations in viscosity or temperature
-
- 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
- F15B2211/50—Pressure control
- F15B2211/505—Pressure control characterised by the type of pressure control means
- F15B2211/50509—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means
- F15B2211/50518—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves
- F15B2211/50527—Pressure control characterised by the type of pressure control means the pressure control means controlling a pressure upstream of the pressure control means using pressure relief valves using cross-pressure relief valves
-
- 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
- F15B2211/60—Circuit components or control therefor
- F15B2211/625—Accumulators
-
- 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
- F15B2211/7053—Double-acting output members
- F15B2211/7054—Having equal piston areas
-
- 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
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7051—Linear output members
- F15B2211/7055—Linear output members having more than two chambers
- F15B2211/7056—Tandem cylinders
-
- 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
- F15B7/00—Systems in which the movement produced is definitely related to the output of a volumetric pump; Telemotors
- F15B7/005—With rotary or crank input
Definitions
- the invention relates to a steering machine with a hydraulic circuit and a compensation device for a hydraulic circuit.
- both rowing machines are known, which are electrically driven and rowing machines, which are hydraulically driven.
- Purely electrically operated rowing machines have an advantage in terms of energy efficiency compared to hydraulically operated rowing machines. However, they need a gear with high reduction or a drive with high torque.
- a variable displacement pump for operation in an open hydraulic circuit of a steering gear is described, for example, in DE 1 036 088.
- the invention has the object to increase the energy efficiency in a hydraulic circuit of a rowing machine.
- a steering machine in particular for an underwater vehicle, is provided with a hydraulic circuit in which a pump is arranged, wherein the pump is a motor-driven reversible hydraulic pump and the hydraulic circuit is a closed circuit.
- the steering machine according to the invention combines the advantages of the two types of drive described above, ie the advantages of energy efficiency, previously with electric drives could be achieved and the advantages of the high actuating forces that can be achieved with hydraulic drives.
- a combination of electrically driven hydraulic pump in a closed hydraulic circuit is provided, which achieves an increased energy efficiency in a simple manner. Energy efficiency is essentially based on the use of a closed hydraulic circuit, so hydraulic power must be supplied only when the rudder is to be moved.
- the basic idea of the solution according to the invention is thus, on the one hand, to provide a closed hydraulic circuit in order to minimize the energy to be expended and, on the other hand, to provide a re-variable pump in order to be able to travel in two directions while avoiding expensive valve controls, that is to say under use the same hydraulic circuit and without complex valve arrangements via a double-acting or two single-acting actuator cylinder to be able to move the rudder in one direction and optionally also in the other direction.
- the hydraulic pump acts directly on a hydraulic cylinder arrangement, in particular on a double-acting cylinder of the same piston area and with double-sided piston rod.
- the hydraulic pump is driven by a servomotor, in particular a servomotor operable in four-quadrant operation.
- a servomotor operable in four-quadrant operation.
- a delivered volume of the hydraulic pump is directly proportional to the cylinder stroke of the hydraulic cylinder assembly.
- a such training is then the number of drive motor revolutions, which is in fixed proportion to the pivoting movement of the rudder and thus a very simple control is possible.
- a rudder is connected via a coupling device, in particular via a connecting rod, with the hydraulic cylinder arrangement.
- the movement of the rudder is controllable via the rotational movement of the servomotor, in particular the position of the rudder over the number of rotations of the servomotor adjustable.
- valves for hydraulic locking of the rudder at pump standstill in the hydraulic circuit can also be provided valves for hydraulic locking of the rudder at pump standstill in the hydraulic circuit.
- a hydraulic locking of the rotor is advantageous because then no provision must be made on the drive side in order to apply this counterforce, that is, no electrical or other energy is required at pump standstill.
- a second pump is provided in the hydraulic circuit, which can be zuschalfbar in a second Leipsungs Grade, in particular in a high-performance area.
- a pressure air operated motor driven hydraulic pump or a compressed air motor as an auxiliary drive for a hydraulic pump.
- a pressure air operated motor driven hydraulic pump or a compressed air motor as an auxiliary drive for a hydraulic pump.
- a compressed air motor is particularly advantageous because submarine side compressed air is available anyway and this is also available when other energy sources fail.
- compressed air drives are inexpensive and easy to install, since no closed circuits and no return lines are required.
- a balancing device for a closed hydraulic circuit in particular a rowing machine, in which a reversible hydraulic pump driven by a motor acts directly on a hydraulic cylinder arrangement for controlling a rudder, is provided, the balancing device providing a predetermined pressure in the hydraulic circuit is and comprises a tandem cylinder with double-sided piston rod and the same piston surfaces, wherein two effective in the same direction piston surfaces with a hydraulic accumulator and the other two piston surfaces are each in communication with one side of the hydraulic cylinder assembly.
- the balancer sees in a simple and effective way the pressure required for the closed hydraulic necessary volume compensation, as is necessary to compensate for temperature-related volume fluctuations and leaks.
- Temperature and leakage-related volume changes are compensated by means of the compensation device according to the invention in such a way that the overall system remains “hard” when driving the cylinder, in contrast to systems known from the prior art systems known from the prior art react "softly", which requires a complicated control of the piston stroke.
- the balancing device according to the invention thus provides on the one hand for the required volume compensation, but on the other hand avoids the otherwise known from hydraulic accumulators spring effects.
- the balancing device according to the invention can be used not only for a closed hydraulic circuit of a rudder system, but also in any other hydraulic circuits, preferably closed circuits, to achieve this effect.
- the hydraulic cylinder arrangement comprises a working cylinder, in particular a double-acting working cylinder of the same piston area and with a piston rod on both sides.
- the tandem cylinder has a first cylinder having a first chamber and a second chamber and a second cylinder having a first chamber and a second chamber
- the working cylinder has a first chamber and a second chamber, the respective first chambers respectively on the one, z. B. the left side of the respective piston surfaces and the respective second chambers are on the respective other, then the right side of the respective piston surfaces, wherein the first chamber of the working cylinder is connected to the first chamber of the first cylinder and the second chamber of the Working cylinder is connected to the first chamber of the second cylinder, and wherein the second chamber of the first ⁇ s cylinder is connected to the hydraulic accumulator and the second chamber of the second cylinder is connected to the hydraulic accumulator.
- a medium pressure to be set in the hydraulic circuit is equal to half the maximum pump pressure difference plus a pedestal pressure.
- the steering machine is equipped with a compensation device, as described above.
- FIG. 1 is a schematic representation of a closed hydraulic system according to an embodiment of the invention, a schematic representation of a closed hydraulic system with a compensation device according to a further embodiment of the invention, and
- Fig. 3 is a hydraulic circuit diagram of a steering machine with balancing device according to another embodiment of the invention.
- FIG. 1 is a schematic representation of a closed hydraulic circuit 1, in which a reversible hydraulic pump 4 operated by a servomotor 5 acts directly on a double-acting cylinder 2 with a piston rod 6 on both sides.
- the two-sided piston rod diameter are the same size.
- a rudder also not shown here is articulated to the piston rod 6 (see FIG. 3) and the rudder motion tion is controlled exclusively by the movement of the servomotor 5.
- To reverse the direction of the servo motor 5 and the hydraulic pump 4 are stopped and started again in the opposite direction.
- the hydraulic circuit 1 of this closed system is designed for a specific system pressure. If the hydraulic fluid in the hydraulic circuit 1 expands due to temperature, the system pressure may increase and exceed permissible pressures. On the other hand, if the system pressure decreases due to temperature and / or leakage, cavitation phenomena can occur on pumps and valves and the function of the system can no longer be fulfilled.
- a hydraulic accumulator 3 is connected to both sides of a hydraulic working cylinder 2, which is biased by the system pressure.
- the gas volume must not be too small, otherwise there will be large system pressure fluctuations as a result of temperature fluctuations.
- FIG. 2 is a schematic representation of a closed hydraulic system with a hydraulic circuit 1 according to another embodiment of the invention, which, in contrast to the "soft" system shown in FIG. 1, is a “hard” system which also in the case of temperature and leakage-related volume changes.
- a tandem cylinder 7 with a piston rod 8 on both sides and piston surfaces of equal size is arranged in the hydraulic circuit 1.
- the tandem cylinder 7 has a first cylinder 9 with a first chamber 10 and a second chamber 10 'and a second cylinder 11 having a first chamber 12 and a second chamber 12'
- the working cylinder 2 also has a first chamber 13 and a second chamber 13 ' Chambers, namely the first chamber 10 of the first cylinder 9, the first chamber 12 of the second cylinder 1 1 and the first chamber 13 of the working cylinder 2 are in the figure respectively on the left side of the respective piston surfaces 14, 15 and 1 6.
- the second Chambers namely the second chamber 10 'of the first cylinder 9, the second chamber 12' of the second cylinder 1 1 and the second chamber 13 'of the working cylinder 2 li
- the first chamber 13 of the working cylinder 2 is connected to the first chamber 10 of the first cylinder 9
- the second chamber 13 'of the working cylinder 2 is connected to the first chamber 12 of the second cylinder 1 1 connected.
- the second chamber 10 'of the first cylinder 9 is connected to a hydraulic accumulator 3 and the second chamber 12' of the second cylinder 1 1 is also connected to the hydraulic accumulator 3.
- the chamber pressures push the tandem piston 8 to the right.
- the piston forces add up.
- the pressure of the hydraulic accumulator acts on the piston surfaces 14, 15.
- the pressure in the hydraulic accumulator is therefore the arithmetic mean of the two chamber pressures of the working cylinder 2. If the hydraulic volume of the hydraulic circuit 1 increases due to an increase in temperature, the piston rod 8 shifts of the tandem cylinder 7 to the right and liquid from the two right chambers 10 ', 12' of the tandem cylinder 7 is pressed into the hydraulic accumulator 3.
- the system pressure increases accordingly slightly suspend the displaced volume in the hydraulic accumulator.
- hydraulic fluid from the hydraulic accumulator 3 in the hydraulic circuit 1 pushes the piston rod 8 of the tandem cylinder 7 to the left and the circulation volume is reduced.
- the system pressure is maintained down to a minimum pressure drop.
- FIG. 3 is a hydraulic circuit diagram of a steering machine 17 with a balancer according to another embodiment of the invention.
- a hydraulic pump 4 acts directly on a double-acting cylinder 2 with double-sided piston rod 6, wherein the piston rod diameter are the same size.
- a coupling device 18, which is designed here as a connecting rod a rudder 19 is coupled motion with the working cylinder 2.
- the hydraulic pump 4 is reversible and is driven by the servo motor 5. To reverse the direction of the servo motor 5 and the hydraulic pump 4 are stopped and in opposite Direction of rotation approached again.
- the hydraulic pump 4 is designed here as a screw pump, since it has the advantage of pulsation poverty.
- the pump 4 is designed to reach the nominal torque under nominal load for starting already. In addition, small numbers of revolutions should be realized for acoustic reasons. This can be achieved by so-called torque motors, designed as permanently excited synchronous motors. These have a starting torque in the amount of the rated torque. Since the rudder movement is controlled by the hydraulic pump 4, a motor controller 20 is provided, which is designed for the four-quadrant operation. The rudder movement is thus controlled exclusively by the rotational movement of the servomotor 5. If no rudder adjustment is required, the rudder 19 is hydraulically locked in its position by retaining valves 21, 21 '(check valves). As a result, no engine torque is applied at standstill and energy is saved. In addition to the pipe losses cause the holding valves 21, 21 'a loss. For low-loss operation, these are low-resistance in the open state.
- pressure limiting valves 22, 22 ' are arranged in the hydraulic circuit 1 to protect the engine 5 and pump 4, which limit the oil pressure and thus the engine torque.
- a cooler 23 is provided close to the pump 4.
- a compensation device as already described in connection with FIG. 2, is also provided here.
- This is again served by the Tandem cylinder 7 with double-sided piston rod 8 and the same piston surfaces.
- the suction and pressure side of the working cylinder 2 are connected to the tandem cylinder 7 such that add the piston forces.
- the connection of the individual chambers has already been described in detail in connection with FIG.
- the pressure of the hydraulic accumulator 3. This pressure is exactly the arithmetic mean of the suction and pressure side of the working cylinder 2. If the volume expands, the piston rod 8 of the tandem cylinder 7 is moved in Fig.
- the mean system pressure rises slightly. Reduces the hydraulic volume in the hydraulic circuit 1 due to cooling, pushes the hydraulic accumulator 3 hydraulic fluid in the tandem cylinder 7, which then moves in Fig. 3 to the left and reduces the circulation volume, so that the system pressure drops slightly.
- the medium pressure to be set is thus equal to half the maximum pump pressure difference plus a pedestal pressure to avoid cavitation on pumps and valves.
- the diving pressure In underwater vehicles, it is customary to guide the piston rod 6 of the working cylinder 2 through a pressure body 24. Thus, the diving pressure additionally acts on the piston rod 6. In order to act on the cylinder 2, regardless of the depth no forces other than the rudder, the diving pressure is also performed on the opposite side 25 of the piston rod 6, whereby lower actuating forces and pump pressures and thus lower Loss of the pump 4 due to internal leakage can be realized.
- the maximum required pump power can also be divided into two units of different delivery capacity.
- small rudder deflections are sufficient at low adjustment speeds.
- z. B. for port maneuvers large adjustment speeds required.
- the ⁇ a pump with a higher delivery capacity is connected in parallel. Since a smaller pump unit less leakage losses, less friction and the power controller of a smaller motor has lower electrical losses compared to a large electric motor, the steering machine 1 7 can be operated even more efficient. In addition, there is redundancy.
- a pneumatic motor 26 which drives the pump 4 in the event of failure of the servomotor 5 or the control.
- compressed air is readily and instantaneously available to an underwater vehicle from compressed air tanks 27.
- the pneumatic motor 26 is, however, usefully only then connected to the pump 4, which is indicated by the dashed line 28 when the compressed air motor 26 is acted upon by compressed air.
- This circuit is known from compressed air starters for diesel engines.
- the rudder 19 is then set either manually or electrically via a 3/4-way valve 29.
- the control of the steering machine 19 is performed as follows.
- the desired rudder angle or the travel s of the working cylinder 2 is predetermined.
- a controller 30 for the path specification 31 determines the deviation from the actual value and specifies the direction of rotation and rotational speed of the motor 5.
- the controller 30 has the task of avoiding a swing around the setpoint.
- the working cylinder 2 is equipped with a displacement sensor 32 for measuring distance.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102013205807.1A DE102013205807A1 (de) | 2013-04-02 | 2013-04-02 | Rudermaschine |
| PCT/EP2014/056189 WO2014161769A1 (de) | 2013-04-02 | 2014-03-27 | Rudermaschine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP2981458A1 true EP2981458A1 (de) | 2016-02-10 |
| EP2981458B1 EP2981458B1 (de) | 2019-11-06 |
Family
ID=50382464
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP14712692.4A Active EP2981458B1 (de) | 2013-04-02 | 2014-03-27 | Rudermaschine |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP2981458B1 (de) |
| DE (1) | DE102013205807A1 (de) |
| ES (1) | ES2766929T3 (de) |
| WO (1) | WO2014161769A1 (de) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11692918B2 (en) | 2021-06-01 | 2023-07-04 | China University Of Mining And Technology, Beijing | Pressure-preserving conventional triaxial compression loading apparatus and method for performing conventional triaxial compression test on pressure-preserving specimen using same |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20180037310A1 (en) * | 2015-03-13 | 2018-02-08 | Bae Systems Plc | Hydraulic system |
| EP3067252A1 (de) * | 2015-03-13 | 2016-09-14 | BAE Systems PLC | Hydraulikanlage |
| DE102019108476A1 (de) * | 2019-04-01 | 2020-10-01 | Moog Gmbh | Hydrauliksystem für Stabilisatorantrieb |
| CN110486337B (zh) * | 2019-09-11 | 2025-06-27 | 三一海洋重工有限公司 | 多腔油缸闭式液压系统及工程机械 |
| CN112709729A (zh) * | 2020-12-31 | 2021-04-27 | 无锡市东舟船舶设备股份有限公司 | 一种集成式泵控闭式拨叉电动液压舵机 |
| CN113341766B (zh) * | 2021-06-10 | 2024-04-12 | 哈尔滨理工大学 | 一种加载与消扰臂长可调的电液负载模拟器 |
Family Cites Families (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE7511765U (de) * | 1975-09-04 | Wedekind K | Handstelltrieb für die Ruderanlage von Segel· und Motorfahrzeugen | |
| GB365939A (en) * | 1931-05-22 | 1932-01-28 | John Hastie & Company Ltd | Improvements in or relating to hydraulic ships' steering gear |
| US2892310A (en) * | 1954-02-17 | 1959-06-30 | Mercier Jean | Automatic follow-up system for successive application of power sources |
| DE1036088B (de) | 1956-04-16 | 1958-08-07 | Licentia Gmbh | Wegabhaengig ferngesteuerte hydraulische Ruderanlage fuer Schiffe, Flugzeuge od. dgl. |
| US3986475A (en) * | 1974-06-17 | 1976-10-19 | Heiser Kenneth R | Control arrangement |
| DE2923130A1 (de) * | 1979-06-07 | 1980-12-11 | Hermes Hans Steuerungstech | Hydraulische ruderanlage |
| JPS58133999A (ja) * | 1982-02-01 | 1983-08-09 | Mitsubishi Heavy Ind Ltd | 単ラム型油圧式舵取装置 |
| US5427045A (en) * | 1993-09-30 | 1995-06-27 | Teleflex (Canada) Ltd. | Steering cylinder with integral servo and valve |
| US5509369A (en) * | 1994-10-11 | 1996-04-23 | Nautamatic Marine Systems | Small watercraft automatic steering apparatus and method |
| US5481871A (en) * | 1995-03-02 | 1996-01-09 | Teleflex (Canada) Ltd. | Hydraulic steering system with spool pressure equalization |
| FR2831226B1 (fr) * | 2001-10-24 | 2005-09-23 | Snecma Moteurs | Actionneur electrohydraulique autonome |
| US7254945B1 (en) * | 2006-02-27 | 2007-08-14 | Kayaba Industry Co., Ltd. | Operate check valve and hydraulic driving unit |
| US8046122B1 (en) * | 2008-08-04 | 2011-10-25 | Brunswick Corporation | Control system for a marine vessel hydraulic steering cylinder |
| WO2010052777A1 (ja) * | 2008-11-06 | 2010-05-14 | 三菱重工業株式会社 | 舵取機 |
| US8589027B2 (en) * | 2010-12-02 | 2013-11-19 | Furuno Electric Company Limited | Steering assist system and method using autopilot device |
| JP2012136148A (ja) * | 2010-12-27 | 2012-07-19 | Kawasaki Heavy Ind Ltd | 舶用操舵装置及び舶用操舵方法 |
-
2013
- 2013-04-02 DE DE102013205807.1A patent/DE102013205807A1/de not_active Ceased
-
2014
- 2014-03-27 EP EP14712692.4A patent/EP2981458B1/de active Active
- 2014-03-27 WO PCT/EP2014/056189 patent/WO2014161769A1/de not_active Ceased
- 2014-03-27 ES ES14712692T patent/ES2766929T3/es active Active
Non-Patent Citations (1)
| Title |
|---|
| See references of WO2014161769A1 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11692918B2 (en) | 2021-06-01 | 2023-07-04 | China University Of Mining And Technology, Beijing | Pressure-preserving conventional triaxial compression loading apparatus and method for performing conventional triaxial compression test on pressure-preserving specimen using same |
Also Published As
| Publication number | Publication date |
|---|---|
| ES2766929T3 (es) | 2020-06-15 |
| WO2014161769A1 (de) | 2014-10-09 |
| DE102013205807A1 (de) | 2014-10-02 |
| EP2981458B1 (de) | 2019-11-06 |
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