Product
Feature
Quick Research
Generate reliable direction feasibility study reports for your R&D in just a few steps.
Technical Q&A
Discover and master advanced knowledge NOW. Basics, ideas, possibilities, all at once.
Find Solutions
As an expert in R&D theories, this can generate solutions to your technical problems instantly.
Evaluate Feasibility
Analyze your overall solution with one click, know your potential R&D risks in advance.
Monitor Landscape
Get weekly tech updates, stay abreast of the latest tech innovations and key insights.
Patents
Literature
Hiro is an intelligent assistant for R&D personnel, combined with Patent DNA, to facilitate innovative research.
117 results about "Electro-hydraulic actuator" patented technology
Efficacy Topic
Property
Owner
Technical Advancement
Application Domain
Technology Topic
Technology Field Word
Patent Country/Region
Patent Type
Patent Status
Application Year
Inventor
Electro-Hydrostatic actuators (EHAs), replace hydraulic systems with self-contained actuators operated solely by electrical power. EHAs eliminate the need for separate hydraulic pumps and tubing, simplifying system architectures and improving safety and reliability. This technology originally was developed for the aerospace industry but has since expanded into many other industries where hydraulic power is commonly used.
Electro-hydraulic actuator system
The system includes a hydraulic powered actuator. A pump system having first and second hydraulic lines is coupled to the first and second ports, respectively and is capable of providing hydraulic fluid to either the first and second lines. First and second pressure sensors are coupled to the first and second lines, respectively. A third line is coupled between the first and second lines and includes first and second valves mounted in series therein. Preferably, the first and second valves are capable of latching in the open position. A reservoir is coupled to the third line between the first and second valves. A shut off valve is included for cutting off the flow from the reservoir.
Owner:NORTHROP GRUMMAN SYST CORP
Integrated energy generating damper
A linear energy harvesting device that includes a housing and a piston that moves at least partially through the housing when it is compressed or extended from a rest position. When the piston moves, hydraulic fluid is pressurized and drives a hydraulic motor. The hydraulic motor drives an electric generator that produces electricity. Both the motor and generator are central to the device housing. Exemplary configurations are disclosed such as monotube, twin-tube, tri-tube and rotary based designs that each incorporates an integrated energy harvesting apparatus. By varying the electrical characteristics on an internal generator, the kinematic characteristics of to the energy harvesting apparatus can be dynamically altered. In another mode, the apparatus can be used as an actuator to create linear movement. Applications include vehicle suspension systems (to act as the primary damper component), railcar bogie dampers, or industrial applications such as machinery dampers and wave energy harvesters, and electro-hydraulic actuators.
Owner:CLEARMOTION INC
Integrated energy generating damper
A linear energy harvesting device that includes a housing and a piston that moves at least partially through the housing when it is compressed or extended from a rest position. When the piston moves, hydraulic fluid is pressurized and drives a hydraulic motor. The hydraulic motor drives an electric generator that produces electricity. Both the motor and generator are central to the device housing. Exemplary configurations are disclosed such as monotube, twin-tube, tri-tube and rotary based designs that each incorporates an integrated energy harvesting apparatus. By varying the electrical characteristics on an internal generator, the kinematic characteristics of the energy harvesting apparatus can be dynamically altered. In another mode, the apparatus can be used as an actuator to create linear movement. Applications include vehicle suspension systems (to act as the primary damper component), railcar bogie dampers, or industrial applications such as machinery dampers and wave energy harvesters, and electro-hydraulic actuators.
Owner:CLEARMOTION INC
Low power loss electro hydraulic actuator
InactiveUS6209825B1High currentHigh power lossAircraft stabilisationWithout power ampliicationElectricityMotor drive
The system includes a hydraulic surface actuator for operating a piston coupled to a structural member of an aircraft for moving the structural member. An electrical feedback sensor is coupled to the actuator piston rod. A summing circuit for receiving a command signal and the feedback signal is provided having an output which is coupled to a loop gain compensator for operating a servo motor. The shaft of the servo motor drives the shaft of a variable displacement pump having ports leading to the ports of the actuator. The variable displacement pump has a swash plate the angle of which is reduced by a hinge moment sensor and a de-stroking actuator when the load on the surface actuator exceeds a given percentage of maximum. A pump gain sensor measures the reduction in pump gain and produces an electrical output which is applied to the loop gain compensator to compensate for reduction in pump gain.
Owner:LOCKHEED MARTIN CORP
Direct-drive electro-hydraulic actuator
ActiveCN102588382AImprove flexibilityImprove reliabilityFluid-pressure actuator componentsFuel tankElectro hydraulic
The invention discloses a direct-drive electro-hydraulic actuator which comprises a direct-drive electro-hydraulic servo pump, a pressurizing oil tank, a first oil compensation check valve, a second oil compensation check valve and a hydraulic cylinder; according to the direct-drive electro-hydraulic actuator, a plurality of oil supply units are combined for use, so that the direct-drive electro-hydraulic servo pump system can be combined for construction according to the power requirement of an integrated hydraulic system; and parts do not need to be designed independently, so that the system has higher flexibility. According to the direct-drive electro-hydraulic actuator, the plurality of oil supply units work simultaneously so as to form a heat backup of the direct-drive electro-hydraulic servo pump system, particularly, redundant configuration is carried out to the pump system; when one or a quantity of oil supply units fail, the other oil supply units can lead the pump system to degrade to work, and compared with the condition that the whole pump fails when a plunger of an axial plunger pump is pulled away or tightly clamped, the direct-drive electro-hydraulic servo pump system has higher reliability.
Owner:BEIHANG UNIV
Electro-hydraulic actuator
ActiveCN103672126AGuaranteed stabilityGuaranteed positioning accuracyOperating means/releasing devices for valvesServomotorsElectricityControl system
The invention discloses an electro-hydraulic actuator. The electro-hydraulic actuator comprises a servo motor, an oil pump, a three-position four-way electromagnetic directional valve, an oil cylinder, a displacement sensor, a controller and a proportional velocity regulating valve. The inlet of the proportional velocity regulating valve is communicated with the oil pump, the outlet of the proportional velocity regulating valve is communicated with a port P of the three-position four-way electromagnetic directional valve, and the proportional velocity regulating valve is electrically connected with the controller. When the electro-hydraulic actuator works, the servo motor, the oil pump and the proportional velocity regulating valve jointly act, hydraulic oil is conveyed into the oil cylinder, due to the fact that the proportional velocity regulating valve can stably control the output flow of a system in an infinitely small mode, the oil cylinder can be made to stably operate at very low speed, the defect that the oil pump can not stably output hydraulic oil in the low-speed operation process caused by factors of the oil pump itself is overcome, and locating accuracy of the oil cylinder is guaranteed.
Owner:CHONGQING CHUANYI AUTOMATION
Electro-hydraulic actuator for controlling the pitch of a blade of a wind turbine
The present invention provides an improvement for use in a wind turbine (20) having a plurality of variable-pitch blades (24) mounted on a hub (23) for rotation relative to a nacelle (22). The improvement broadly includes: a electro-hydraulic actuator (25) for controlling the pitch of one of the blades, the actuator including: a motor (26) adapted to be supplied with a current; a pump (27) driven by the motor and arranged to provide a hydraulic output as a function of the current supplied to the motor; and a hydraulic actuator (28) operatively arranged to selectively vary the pitch of the associated blade as a function of the hydraulic output of the pump; and wherein the motor, pump and actuator are physically arranged within the hub of the wind turbine.
Owner:GEIGER DAVID
Integrated electro-hydraulic actuator capable of carrying out quick action and adjustment
ActiveCN1865746ACompact structureReduce volumeOperating means/releasing devices for valvesServomotorsElectric machineHydraulic pump
The invention discloses an integrated electric hydraulic executer with quick motion and adjustment. Wherein, present hydraulic executer needs external hydraulic station, to increase the volume and relative maintenance. The invention is characterized in that: it comprises a hydraulic cylinder, an integrated power source and a quick power source. Wherein, the quick power source comprises that: the hydraulic pump group via one-way valve feeds hydraulic oil to the accumulator; there is a check valve between the accumulator and the cylinder; the accumulator as the indirect oil source, via two electromagnetic steering valves, provides power oil to the cylinder; the electro voltage switch controls the voltage of accumulator; said integrated power source is formed by a servo motor, a step motor, a bidirectional hydraulic pump and a hydraulic control valve. The invention has the advantages that: it has itself oil source, with compact structure, small volume, lower weight, long service life, and reliable control, while it can be used to control the flux and pressure of tube.
Owner:SHENYANG NORTHEAST ELECTRIC POWER CONTROL
High-Flow Electro-Hydraulic Actuator
ActiveUS20130062542A1Cost-effectiveOperating means/releasing devices for valvesServomotor componentsEngineeringActuator
Embodiments of the invention provide a high-reliability, cost-effective electro-hydraulic servo-valve assembly that is not susceptible to failure caused by contaminated fluid. In particular embodiments, the electro-hydraulic servo-valve assembly includes a rotary valve that may be actuated by either a direct-coupled Limited Angle Torque (LAT) motor, a geared, brushless DC motor, or some other rotary electric actuating element with an integrated driver circuit. In particular embodiments, the rotary valve element made up of an outer sleeve element and an inner spool element, with matching ports and slots, respectively.
Owner:WOODWARD GOVERNOR CO
Blade electro-hydraulic adjustment method and device of high-oil-pressure control water turbine
ActiveCN103939273AWith adjustment functionTake advantage ofHydro energy generationMachines/enginesWater turbineEngineering
The invention discloses a blade electro-hydraulic adjustment method and device of a high-oil-pressure control water turbine. A fuzzy mathematic model is established for a selected blade angle calculation method according to hydropower station hydrologic data and unit parameters. Then, a high-oil-pressure control blade adjustment electro-hydraulic actuator adjusts a rotating blade to the calculated angle according to changes of the water head and flow, and therefore high hydraulic energy conversion efficiency is obtained, and the target of the maximum annual energy output of a high-oil-pressure control blade angle rapid adjustment hydroelectric generating set is achieved. According to the key technology, a high-oil-pressure control system is adopted for the turbine blade adjustment actuator, a standard ball floating seal is adopted, and therefore the problem of oil leakage of a high-oil-pressure rotating sealing device is completely solved. The blade electro-hydraulic adjustment method and device fill in technical gaps in controlling blade adjustment by a Kaplan turbine through the high-oil-pressure speed controller system, and great technical innovation is achieved for the structural design of the water turbine.
Owner:SHENZHEN ENLAIJI ENERGY TECH CO LTD
On-line neural network fault diagnosis method based on data driving
ActiveCN109376413AAchieve dimensionality reductionAchieve integrationDesign optimisation/simulationSpecial data processing applicationsDiagnosis methodsEngineering
The invention relates to the fault diagnosis field of an electro-hydraulic actuator, and discloses an on-line neural network fault diagnosis method based on data driving, which solves the problem thata database cannot be updated in real time in the traditional fault diagnosis of the actuator. The main points of the invention are as follows: analyzing the structure of an electro-hydraulic actuator, and building a simulation model of the electro-hydraulic actuator; analyzing the failure form of actuator, implanting different types of faults into the simulation model of electro-hydraulic actuator to complete the signal acquisition; collecting the data, extracting the eigenvalue and reduce the dimension; constructing the tag fault data matrix, and training the eigenvalues offline and online,so that the online neural network can be obtained. The electro-hydraulic actuator working data is acquired in real time, an on-line neural network is used to collect the data for fault diagnosis; after fault diagnosis, the collected data are trained on-line to update the on-line neural network. The invention is applicable to the fault diagnosis of the electro-hydraulic actuator.
Owner:SICHUAN UNIV
Electro-hydraulic lift mechanism for lawn mower deck
A mower deck lift mechanism for a lawn mower includes a mower deck, a linkage mechanism for movably mounting the mower deck to the frame for raising and lowering movement relative to the frame, and an electro-hydraulic actuator assembly connected to the linkage mechanism for raising and lowering the mower deck relative to the frame. The actuator assembly is an integrated unit including a hydraulic piston-cylinder assembly connected to the linkage mechanism, a pump for supplying pressurized fluid to the piston-cylinder assembly, and an electric motor for driving the pump.
Owner:PARKER INTANGIBLES LLC
Electro-hydraulic lift mechanism for lawn mower deck
A mower deck lift mechanism for a lawn mower includes a mower deck, a linkage mechanism for movably mounting the mower deck to the frame for raising and lowering movement relative to the frame, and an electro-hydraulic actuator assembly connected to the linkage mechanism for raising and lowering the mower deck relative to the frame. The actuator assembly is an integrated unit including a hydraulic piston-cylinder assembly connected to the linkage mechanism, a pump for supplying pressurized fluid to the piston-cylinder assembly, and an electric motor for driving the pump.
Owner:PARKER INTANGIBLES LLC
Pump control type electrohydraulic actuator
InactiveCN101235836ASmooth movementSolve the problem of unbalanced traffic changesPump controlPositive-displacement liquid enginesElectrothermal actuatorAir filter
The invention relates to a pump-control electro-hydraulic actuator, which comprises a position controller which is connected with a position sensor, the position sensor is connected with an expose head cylinder, two cavities of the expose head cylinder are respectively connected with the two ends of a hydraulic lock through a pipeline, the two ends of the hydraulic lock are connected with a two-way pump, a left relief valve, a right relief valve and a single valve, the other end of the check valves is connected and is connected with a fuel filter which is arranged in the oil box, the left relief valve and the right relief valve are connected with the oil box through the pipeline, an air filter and a liquid level thermometer are respectively arranged on the top portion and the side surface of the oil box, a distal control room is connected with a motor control unit through a wire, the two-way pump is connected with a motor, and the motor is connected with the motor control unit. The pump-control electro-hydraulic actuator leads the control room to adjust the motor control unit and adjust the rotating speed of the motor through a signal which is feedback to the position controller by a signal sensor, thereby adjusting the rotating speed of the two-way pump, achieving the changing of the two cavities of a hydro cylinder, and achieving the purpose of adjusting position. The pump-control electro-hydraulic actuator has low energy consumption, small volume, low cost and excellent control effect.
Owner:陈岩
Electro hydraulic actuator with spring energized accumulators
An electro hydraulic actuator with built-in fail safes is provided. Multiple accumulators are integrated into the actuator to improve reliability and redundancy. One or more accumulators can fail and the remaining accumulators provide sufficient energy to move the actuator to its fail-safe condition.
Owner:WOODWARD GOVERNOR CO
High-flow electro-hydraulic actuator
ActiveUS9127694B2Cost-effectiveOperating means/releasing devices for valvesServomotor componentsDriver circuitGear drive
Embodiments of the invention provide a high-reliability, cost-effective electro-hydraulic servo-valve assembly that is not susceptible to failure caused by contaminated fluid. In particular embodiments, the electro-hydraulic servo-valve assembly includes a rotary valve that may be actuated by either a direct-coupled Limited Angle Torque (LAT) motor, a geared, brushless DC motor, or some other rotary electric actuating element with an integrated driver circuit. In particular embodiments, the rotary valve element made up of an outer sleeve element and an inner spool element, with matching ports and slots, respectively.
Owner:WOODWARD GOVERNOR CO
Electro-hydraulic actuator of spherical pump for robot
ActiveCN105179388AReduce volumeReduce vibrationFluid-pressure actuator componentsEngineeringHigh pressure
Disclosed is an electro-hydraulic actuator of a spherical pump for a robot. Two oil feeding and discharging openings (121) for oil feeding and discharging are formed in a cylinder cover (101) of the spherical pump (1). When the spherical pump (1) rotates in the forward direction, high-pressure oil is discharged through one oil feeding and discharging opening (121) formed in the cylinder cover (101) and enters a working cylinder of a double-piston-rod cylinder, oil in a non-working cylinder of the double-piston-rod cylinder flows back to the other oil feeding and discharging opening (121) formed in the cylinder cover (101), and double piston rods (7) stretch out to do work. When the spherical pump (1) rotates in the reverse direction, an oil circuit is reverse, and the double piston rods (7) are drawn back. Oil flowing from an overflowing channel (111) of the spherical pump (1) is communicated to an elastic oil reservoir (19), and is communicated to an oil discharging channel and an oil return channel of a main oil circuit through two check valves (15). The electro-hydraulic actuator has the advantages of being small in size, light in weight, high in running efficiency and low in energy consumption, and being capable of being used in exoskeleton suits and autonomous walking robots.
Owner:深圳市球形动力科技有限公司
Electro-hydraulic actuator with mechanical servo position feedback
A method and apparatus for an electro-hydraulic actuator (1) having mechanical feedback provide closed loop control with a high degree of accuracy. The electro-hydraulic actuator (1) includes a current versus load generator (10), a single-stage servomechanism (20, 21, 22, 23), and a device (24, 25, 40, 41) for providing a mechanical feedback force for offsetting an input force (Fsol) of the current versus load generator (10).
Owner:HONEYWELL INT INC
Electro-hydraulic actuator for controlling the pitch of a blade of a wind turbine
The present invention provides an improvement for use in a wind turbine (20) having a plurality of variable-pitch blades (24) mounted on a hub (23) for rotation relative to a nacelle (22). The improvement broadly includes: a electro-hydraulic actuator (25) for controlling the pitch of one of the blades, the actuator including: a motor (26) adapted to be supplied with a current; a pump (27) drivenby the motor and arranged to provide a hydraulic output as a function of the current supplied to the motor; and a hydraulic actuator (28) operatively arranged to selectively vary the pitch of the associated blade as a function of the hydraulic output of the pump; and wherein the motor, pump and actuator are physically arranged within the hub of the wind turbine.
Owner:MOOG INC
Closed electro-hydraulic actuator and assembly of closed electro-hydraulic actuator
InactiveCN103511004AAdd loading functionLow cleanliness requirementsMachines/enginesEngine componentsFuel tankPiston rod
The invention discloses a closed electro-hydraulic actuator. The closed electro-hydraulic actuator comprises an oil tank, an oil servo-motor, a filter mechanism, an energy storage mechanism, a cooler, an oil cylinder casing, a spring mechanism and a motor pump unit, wherein the oil servo-motor comprises an oil cylinder and an integration module. The oil cylinder is installed on the upper side of an oil cylinder top cover and arranged at the center of the inner cavity of the oil cylinder top cover, and the integration module is installed on the lower side of an oil tank top cover and corresponds to the position of the oil cylinder. A cylinder barrel of the oil cylinder is directly connected with the oil tank top cover in a sealed matching mode. The spring mechanism penetrating the inner cavity of the whole oil cylinder casing is installed outside the oil cylinder. One end of the spring mechanism is pressed on the upper side of the oil tank top cover, and the other end of the spring mechanism is connected with a piston rod of the oil cylinder. The extended end of the piston rod of the oil cylinder is connected with a displacement sensor. The closed electro-hydraulic actuator occupies a small area and is small in space size, convenient to install and quick and convenient to use, and mechanical connection in other modes does not exist except the mechanical connection at the valve position of a steam turbine set.
Owner:SHANGHAI XINLI MACHINE PLANT
Chain cutter
InactiveUS6880378B1Minimize timeMinimizing energyNibbling shearing machinesMetal working apparatusEngineeringBending force
A compact chain cutting apparatus for automatically shearing and opening a chain link of a selected thickness in one operation is disclosed. The apparatus includes a housing, a first shearing member, a second shearing member, and an electro-hydraulic actuator system. The first shearing member is mounted to the housing. The second shearing member is pivotally mounted to the housing for movement to exert, in cooperation with the first shearing member, shearing and bending forces upon the chain link. The electro-hydraulic actuator system cooperates with the second shearing member to move automatically the second shearing member to shear and to bend the chain link, thereby defining an opening in the chain link greater than the thickness of the link.
Owner:VINDEE INDS
Electro hydraulic actuator for butterfly valve
InactiveCN105020458ANo throttling lossImprove efficiencyOperating means/releasing devices for valvesDisplay deviceHydraulic pump
The invention provides an electro hydraulic actuator for a butterfly valve. The electro hydraulic actuator comprises a shell, an electronic control part and a hydraulic system. The electronic control part comprises a controller, a displayer, control switches and an angle sensor, wherein the displayer, the control switches and the angle sensor are connected with the controller. The hydraulic system comprises a bidirectional gear quantitive hydraulic pump, an AC servo motor, one-way valves, a pressure oil tank, a double-liquid-control one-way valve, a gear rack type hydraulic cylinder and the butterfly valve. The AC servo motor is connected with the controller, and an output shaft of the AC servo motor is connected with an input shaft of the quantitive hydraulic pump. The pressure oil tank is communicated with a low-pressure oil suction port of the quantitive hydraulic pump through the one-way valves. Two outlets of the quantitive hydraulic pump are communicated with the hydraulic cylinder through the double-liquid-control one-way valve. The angle sensor is fixed to the upper portion of the hydraulic cylinder. One end, extending out of the hydraulic cylinder, of a rotation shaft is connected with a rotation shaft of the angle sensor. An output shaft of the hydraulic cylinder is connected with a rotation shaft of the butterfly valve. A hydraulic cylinder drive is high in response speed, the integration of the hydraulic cylinder is high, and the electro hydraulic actuator has high market competitiveness.
Owner:JIANGSU UNIV
Foot-type robot knee joint with embedded integrated electro-hydraulic actuator
The invention discloses a foot-type robot knee joint with an embedded integrated electro-hydraulic actuator. An electro-hydraulic actuator, a piston rod, a p spring and a connecting rod are included;the integrated electro-hydraulic actuator is installed on a thigh rod, the hydraulic cylinder of the electro-hydraulic actuator is embedded in the upper portion of the thigh rod as an upper cavity, acavity is formed in the lower hollow portion of the thigh rod as a lower cavity, the piston rod is installed in the thigh rod, the upper end of the piston rod is located in the upper cavity, and the lower end of the piston rod is located in the lower cavity; the lower end of the connecting rod is hinged to a calf rod, the upper end of the connecting rod is hinged to the thigh rod through a circular boss. The controlling of the knee joint is convenient through simple mechanisms and cooperation, adjustable variable speed can be achieved, the piston rod can be prevented from bending moment damageand linear movement jamming, and the spring has a buffering effect and can prevent a robot body from being violently impacted.
Owner:ZHEJIANG UNIV
Electro-hydraulic actuator with spring energized accumulators
InactiveCN1924369AClear descriptionAccumulator installationsFluid-pressure actuatorsActuatorControl theory
An electro-hydraulic actuator with built-in fail safes is provided. Multiple accumulators are integrated into the actuator to improve reliability and redundancy. One or more accumulators can fail and the remaining accumulators provide sufficient energy to move the actuator to its fail-safe condition.
Owner:WOODWARD GOVERNOR CO
Electro-hydraulic actuator of hydraulic integration machine
InactiveCN101846119ARealize regulationRealize cut-off controlFluid-pressure actuator componentsControl systemFuel tank
Owner:LISHUI ZHONGDE PETROCHEM EQUIP
Chain cutter
InactiveUS20050120768A1Preventing unrestrained twistingPrimingNibbling shearing machinesMetal chainsEngineeringBending force
A compact chain cutting apparatus for automatically shearing and opening a chain link of a selected thickness in one operation is disclosed. The apparatus includes a housing, a first shearing member, a second shearing member, and an electro-hydraulic actuator system. The first shearing member is mounted to the housing. The second shearing member is pivotally mounted to the housing for movement to exert, in cooperation with the first shearing member, shearing and bending forces upon the chain link. The electro-hydraulic actuator system cooperates with the second shearing member to move automatically the second shearing member to shear and to bend the chain link, thereby defining an opening in the chain link greater than the thickness of the link.
Owner:VINDEE INDS
Control system for a hydraulic servomotor
InactiveUS7677035B2Avoid the needEasier fitted into desiredFluid couplingsServomotor componentsControl systemServomotor
A control system for a hydraulic servomotor (13) is disclosed. The control system comprises an electro hydraulic actuator (2) comprising a number of valves (9, 10, 11, 12, 18) for controlling fluid flows, a main control module (1), and one or more connectors. The control system further comprises at least one extension control module (3) comprising one or more connectors. Finally, the control system comprises means (6) for communicating signals between the main control module (1) and each of the extension control module(s) (3). Since the main control module (1) and the extension control module(s) (3) are able to communicate signals, it is possible to provide signals to / from the main control module (1) via an extension module (3), thereby in effect providing additional connectors to the main control module (1). Thereby the main control module (1) may be able to perform additional functions as compared to similar prior art control modules.
Owner:DANFOSS PAUER SOLYUSHENS APS
Intelligent electro-hydraulic actuator self-healing regulation and control system control method
ActiveCN105159263AGuaranteed uptimeImprove reliabilityTotal factory controlProgramme total factory controlSelf-healingMaintainability
The invention relates to an intelligent electro-hydraulic actuator self-healing regulation and control system control method, which comprises the steps of collecting on-site incoming signals when the intelligent electro-hydraulic actuator is in work state, wherein the on-site incoming signals comprise a sensor signal, a hydraulic control valve signal, a controller signal, an oil pump signal and / or a power supply system signal. The beneficial effects of the present invention are that thanks to the comprehensive realization of the EHS intelligent electro-hydraulic actuator control system self-healing function, the apparatus reliability is greatly lifted; advantages like strong maintainability and high intelligent degree are provided; few technology personnel are required to diagnose and maintain the fault; the fault processing time is close to 0; maintenance can be done without shutdown the apparatus and temporary shutdown is avoided; influence to control and production prevented in the maintenance process; harm to the apparatus and the controlled object is prevented; and accident to safety and production is prevented; the system is in good state again after the maintenance; and a catalytic cracking apparatus can be ensured for stationary operation.
Owner:九江长江仪表精密液压件厂
Electro hydraulic actuator with spring energized accumulators
An electro hydraulic actuator with built-in fail safes is provided. Multiple accumulators are integrated into the actuator to improve reliability and redundancy. One or more accumulators can fail and the remaining accumulators provide sufficient energy to move the actuator to its fail-safe condition.
Owner:WOODWARD GOVERNOR CO
Electrohydraulic actuator with a pump incorporated in the piston
InactiveUS20110146262A1Easy to disassembleFluid couplingsServometer circuitsElectric machineActuator
The invention relates to an electrohydraulic actuator comprising a body (1) that defines a cylindrical cavity (2) in which a piston (3) slides in leaktight manner and divides an inside volume of the cavity into two chambers (A, B) of variable volume, the piston being associated with at least one rod (4) passing in leaktight manner through an end wall of the cavity, the actuator including a bidirectional pump (5) having two ports (P1, P2), each connected to one of the chambers, an electric motor (8) for selectively driving the pump in one direction or the other, the pump being placed inside the piston of the actuator so as to move together therewith. According to the invention, the motor is placed at the end of the actuator and drives a shaft of non-circular section (6) extending through the cavity parallel to a sliding direction of the piston (3) and of the rod (4), the shaft passing through the piston (3) to co-operate with a complementary drive member (11; 21) of the pump that slides freely along the shaft during movements of the rod but that is driven in rotation when the shaft turns under drive from the electric motor.
Owner:SAFRAN LANDING SYSTEMS
Who we serve
- R&D Engineer
- R&D Manager
- IP Professional
Why Patsnap Eureka
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com