CN114893456A - One-way throttling load sensitive electro-hydrostatic actuator - Google Patents
One-way throttling load sensitive electro-hydrostatic actuator Download PDFInfo
- Publication number
- CN114893456A CN114893456A CN202210351756.5A CN202210351756A CN114893456A CN 114893456 A CN114893456 A CN 114893456A CN 202210351756 A CN202210351756 A CN 202210351756A CN 114893456 A CN114893456 A CN 114893456A
- Authority
- CN
- China
- Prior art keywords
- load
- pipeline
- valve
- throttling
- pump
- 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
Images
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
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/04—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed
- F15B11/042—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in"
- F15B11/0423—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the speed by means in the feed line, i.e. "meter in" by controlling pump output or bypass, other than to maintain constant speed
-
- 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
- F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
- F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
-
- 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
- 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
-
- 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
- F15B21/02—Servomotor systems with programme control derived from a store or timing device; Control devices therefor
-
- 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
- F15B2211/20546—Type of pump variable capacity
-
- 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
- F15B2211/25—Pressure control functions
-
- 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
- F15B2211/255—Flow control functions
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T50/00—Aeronautics or air transport
- Y02T50/40—Weight reduction
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
A motor is connected with an input shaft of a load sensitive pump, the load sensitive pump is communicated with a first cavity of a working cylinder through a first pipeline, the load sensitive pump is communicated with a second cavity of the working cylinder through a second pipeline, and a one-way throttling load sensitive module realizes connection of load pressure and a swash plate control end of the load sensitive pump. When the load is rapidly increased, pressure medium enters the swash plate control end of the load sensitive pump through the one-way throttling load sensitive module, so that the swash plate angle of the load sensitive pump is slowly reduced, the displacement of the load sensitive pump is not rapidly reduced when the load is rapidly increased, and the rigidity of the electro-hydrostatic actuator is kept; when the load becomes smaller, the pressure medium of the variable actuating cylinder of the load sensitive pump flows out through the one-way throttling load sensitive module, the angle of a swash plate of the load sensitive pump can be increased rapidly, the displacement of the pump is increased rapidly, and the response speed of the electro-hydrostatic actuator is improved.
Description
Technical Field
The disclosure belongs to the technical field of medium control, and particularly relates to a one-way throttling load sensitive electro-hydrostatic actuator.
Background
The electro-hydrostatic actuator is an important flight control device in an aircraft, and the conventional electro-hydrostatic actuator adopts a constant displacement pump and carries out variable adjustment through a servo motor. Under the condition of large load, the pump can generate large load moment, so that the motor generates heat seriously. . The constant displacement pump of load sensitive electro-hydrostatic actuator in with conventional electro-hydrostatic actuator changes into the variable displacement pump, draws back load pressure and realizes that the pump discharge capacity changes, and under the heavy load condition, the discharge capacity of pump can reduce to reduce input torque, thereby can reduce motor torque, reduce the motor and generate heat. This is a conventional load sensitive technique, but when used in a hydrostatic actuator, this technique reduces the stiffness of the actuator and reduces the response speed of the actuator.
Disclosure of Invention
In order to solve the above technical problem, an object of the present disclosure is to provide an electro-hydrostatic actuator with simple structure and low cost.
In order to achieve the purpose of the disclosure, the technical scheme adopted by the disclosure is as follows:
a one-way throttling load-sensitive electro-hydrostatic actuator comprises a motor, a load-sensitive pump, an actuating cylinder and a one-way throttling load-sensitive module;
the motor is in power connection with the load-sensitive pump, one end of the load-sensitive pump is communicated with the first cavity of the actuating cylinder through a first pipeline, the second end of the load-sensitive pump is communicated with the second cavity of the actuating cylinder through a second pipeline,
the control end of the load sensitive pump is respectively connected with the first pipeline and the second pipeline through a one-way throttling load sensitive module;
when the unidirectional throttling load sensing module is in a first working mode, media in pipelines with relatively high pressure in the first pipeline and the second pipeline are introduced into the control end of the load sensing pump through the unidirectional throttling load sensing module;
when the one-way throttling load sensing module is in a second working mode, the medium of the load sensing pump is introduced into a pipeline with relatively low pressure in the first pipeline or the second pipeline through the one-way throttling load sensing module.
Optionally, the one-way throttling load sensing module comprises a shuttle valve, a first throttling valve and a second throttling valve;
the first inlet of the shuttle valve is communicated with the first pipeline, the second inlet of the shuttle valve is communicated with the second pipeline, the outlet of the shuttle valve is communicated with the first pipeline through the first throttling valve, the outlet of the shuttle valve is connected with the second pipeline through the second throttling valve, and the outlet of the shuttle valve is communicated with the control end of the load-sensitive pump.
Optionally, the one-way throttling load sensing module further comprises a third throttling valve and a third one-way valve connected in parallel with the third throttling valve,
the outlet of the shuttle valve is communicated with the control end of the load-sensitive pump through a third throttling valve, and the outlet of the shuttle valve is also communicated with the control end of the load-sensitive pump in a one-way mode through a third one-way valve.
Optionally, the system further comprises a liquid supplementing oil tank, a first check valve and a second check valve;
the outlet of the shuttle valve is communicated with the liquid supplementing oil tank, the outlet of the shuttle valve is also communicated with the first pipeline through a first one-way valve, and the outlet of the shuttle valve is also communicated with the second pipeline through a second one-way valve.
Optionally, the first pipeline is communicated with the second pipeline through a fourth throttling valve.
Optionally, the system further comprises a first overflow valve, the first pipeline is communicated with the second pipeline through the first overflow valve, and the first overflow valve is used for overflowing the oil liquid in the first pipeline to the second pipeline.
Optionally, the system further comprises a second overflow valve, the second pipeline is communicated with the first pipeline through the second overflow valve, and the second overflow valve is used for overflowing the oil liquid of the second pipeline to the first pipeline.
Optionally, the motor is a brushless dc motor.
Optionally, the load-sensitive pump is a variable displacement piston pump, and the control end of the load-sensitive pump is communicated with the swash plate control end of the variable displacement piston pump.
Optionally, the one-way throttling load-sensitive electro-hydrostatic actuator comprises a first module, a second module and a third module which are connected in sequence; the motor is installed in the first module, the load sensing pump and the one-way throttling load sensing module are installed in the second module, and the actuating cylinder is installed in the third module.
The load sensing module is provided for leading a medium with relatively high pressure in a first pipeline or a second pipeline into a swash plate control end of a load sensing pump or leading the medium at the control end of the load sensing pump into a pipeline with relatively low pressure in the first pipeline or the second pipeline;
under a heavy-load working condition, medium pressures of a working cavity and a working pipeline in the actuator are higher, namely the pressure of the working pipeline in the first pipeline or the second pipeline is higher, the one-way throttling load sensing module is in a first working mode, and pressure medium enters the control end of the load sensing pump through the one-way throttling load sensing module and can adjust the angle of a swash plate of the load sensing pump, so that the flow and the pressure in the working pipeline are passively adjusted;
under the working condition of small load, the medium pressure of a working cavity and a working pipeline in the actuator is small, the pressure of the working pipeline in the first pipeline or the second pipeline is small, the one-way throttling load sensing module is in the second working mode, the pressure medium at the control end of the load sensing pump enters the pipeline with relatively small pressure in the first pipeline or the second pipeline through the one-way throttling load sensing module, the angle of a swash plate of the load sensing pump can be automatically adjusted, and therefore the flow and the pressure in the working pipeline can be passively adjusted.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate exemplary embodiments of the disclosure and together with the description serve to explain the principles of the disclosure.
FIG. 1 is a first hydraulic schematic diagram of a one-way throttling load-sensitive electro-hydrostatic actuator of the present disclosure;
fig. 2 is a hydraulic schematic diagram of a one-way throttling load-sensitive electro-hydrostatic actuator according to the disclosure.
Detailed Description
The present disclosure will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are for purposes of illustration only and are not to be construed as limitations of the present disclosure. It should be further noted that, for the convenience of description, only the portions relevant to the present disclosure are shown in the drawings.
It should be noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
Referring to fig. 1, the unidirectional throttling load sensing electro-hydrostatic actuator comprises a motor 1, a load sensing pump 2, an actuating cylinder 14 and a unidirectional throttling load sensing module; wherein, the first and the second end of the pipe are connected with each other,
the motor 1 is used for driving the load sensitive pump to act, and the motor 1 adopts a brushless direct current motor in the disclosure; the load-sensitive pump 2 can generally adopt a variable displacement piston pump, the variable displacement piston pump is provided with a control end besides a first inlet and a second inlet of a medium, the control end is used for receiving the pressure of a load pipeline to adjust the inclination angle of a swash plate of the variable displacement piston pump, and can receive the medium pressure information of the load pipeline to adjust the flow or the pressure; the cylinder 14 is generally a double acting cylinder.
The motor 1 is connected with the load-sensitive pump 2, one end of the load-sensitive pump 2 is communicated with the first cavity of the actuating cylinder 14 through a first pipeline 15 and used for pressurizing the first cavity and driving the other end of the actuating cylinder 14 to extend out, and the second end of the load-sensitive pump 2 is communicated with the second cavity of the actuating cylinder 14 through a second pipeline 16 and used for pressurizing the second cavity and driving one end of the actuating cylinder 14 to extend out.
When the one-way throttling load sensing module is in the first working mode, the medium in the pipeline with relatively high pressure in the first pipeline 15 and the second pipeline 16 is introduced into the swash plate control end of the load sensing pump 2 through the one-way throttling load sensing module.
When the one-way throttling load sensing module is in the second working mode, the medium at the swash plate control end of the load sensing pump 2 is introduced into a pipeline with relatively low pressure in the first pipeline 15 or the second pipeline 16 through the one-way throttling load sensing module.
When the load sensitive pump 2 is a variable displacement plunger pump, the swash plate control end of the load sensitive pump 2 is communicated with the swash plate control end of the variable displacement plunger pump; when the oil hydraulic pressure is greater than the pressure when the swash plate is stable, the angle of the swash plate is increased, and the flow is increased; when the oil pressure is lower than the pressure when the swash plate is stable, the angle of the swash plate is reduced, and the flow is reduced.
When a large-load working condition is met, medium pressures of a working cavity and a working pipeline in the actuator 14 are high, namely the pressure of the working pipeline in the first pipeline 15 or the second pipeline 16 is high, the one-way throttling load sensing module is in a first working mode, pressure medium enters the swash plate control end of the load sensing pump 2 through the one-way throttling load sensing module, the angle of the swash plate of the load sensing pump 2 can be adjusted, and therefore the flow and the pressure in the working pipeline are passively adjusted;
when a small-load working condition is met, medium pressures of a working cavity and a working pipeline in the actuator 14 are low, namely the pressure of the working pipeline in the first pipeline 15 or the second pipeline 16 is low, the one-way throttling load sensing module is in a second working mode, pressure medium at the swash plate control end of the load sensing pump 2 enters the pipeline with relatively low pressure in the first pipeline 15 or the second pipeline 16 through the one-way throttling load sensing module, the angle of the swash plate of the load sensing pump 2 can be automatically adjusted, and therefore flow and pressure in the working pipeline are passively adjusted.
In some specific embodiments, the one-way throttling load sensing module comprises a shuttle valve 9, a first throttling valve 4 and a second throttling valve 5; the first inlet of the shuttle valve 9 is communicated with a first pipeline 15, the second inlet of the shuttle valve 9 is communicated with a second pipeline 16, the outlet of the shuttle valve 9 is communicated with the first pipeline 15 through a first throttling valve 4, the outlet of the shuttle valve 9 is connected with the second pipeline 16 through a second throttling valve 5, and the outlet of the shuttle valve 9 is communicated with the swash plate control end of the load-sensitive pump 1. The throttle valve is used for forming a certain pressure difference between the high-pressure pipeline and the low-pressure pipeline, and the shuttle valve 9 is used for introducing oil with higher pressure into the swash plate control end of the load sensitive pump 2 to control the angle of the swash plate.
When a large-load working condition is met, high-pressure oil liquid enters the swash plate control end of the load sensitive pump 2 through the inlet of the shuttle valve 9 and then the outlet of the shuttle valve 9 to control the angle of the swash plate. When a small load working condition is met, the swash plate control end of the load sensitive pump 2 returns to the pipeline after passing through the shuttle valve 9 and the throttle valve.
In another embodiment, the unidirectional throttling load sensing module further comprises a third throttling valve 12 and a third one-way valve 13 connected with the third throttling valve 12 in parallel, the outlet of the shuttle valve 9 is communicated with the swash plate control end of the load sensing pump 1 through the third throttling valve 12, and the outlet of the shuttle valve 9 is further communicated with the swash plate control end of the load sensing pump 1 in a unidirectional mode through the third one-way valve 13.
When the load becomes larger and the swash plate angle becomes smaller, the oil flows through the third throttle valve 12, so that the purpose of slowing down the reduction of the swash plate is achieved, the rigidity of the actuator can be kept when the load changes transiently, and the robustness of the EHA can be improved; on the contrary, when the load is suddenly reduced, the oil liquid at the control end of the swash plate of the load sensitive pump 2 flows through the one-way valve 13, so that the angle of the swash plate can be rapidly changed, the rigidity of the system is improved, and the response speed of the system can also be improved. When the load is stable, the angle of the swash plate is slowly changed through the damping holes to reach a stable state, so that the discharge capacity is reduced, and the heating of the motor is reduced.
In a further embodiment, the one-way throttling load-sensitive electro-hydrostatic actuator further comprises a fluid supplementing oil tank 8, a first one-way valve 6 and a second one-way valve 7; the outlet of the shuttle valve 9 is communicated with a liquid supplementing oil tank 8, the outlet of the shuttle valve 9 is also communicated with a first pipeline 15 through a first one-way valve 6, and the outlet of the shuttle valve 9 is also communicated with a second pipeline 16 through a second one-way valve 7. The liquid supplementing oil tank 8 is a storage device in the system, stores energy oil in the system at a proper time, and releases the oil through the first check valve 6 or the second check valve to supplement the system when the system needs the energy oil. The one-way throttling load-sensitive electro-hydrostatic actuator further comprises a fourth throttling valve 3, and the first pipeline 15 is communicated with the second pipeline 16 through the fourth throttling valve 3. The one-way throttling load sensitive electro-hydrostatic actuator further comprises a first overflow valve 10, the first pipeline 15 is communicated with a second pipeline 16 through the first overflow valve 10, and the first overflow valve 10 is used for overflowing oil in the first pipeline 15 to the second pipeline 16 to prevent the first pipeline 15 from being protected due to overhigh pressure in the first pipeline 15. The one-way throttling load-sensitive electro-hydrostatic actuator further comprises a second overflow valve 11, the second pipeline 16 is communicated with the first pipeline 15 through the second overflow valve 11, and the second overflow valve 11 is used for overflowing oil of the second pipeline 16 to the first pipeline 15. Preventing the pressure in second line 16 from becoming too high protects first line 16.
In order to facilitate modular installation, the one-way throttling load sensitive electro-hydrostatic actuator comprises a first module A, a second module B and a third module C which are sequentially connected; the motor 1 is installed in the first module a, the load sensing pump 2 and the one-way throttle load sensing module are installed in the second module B, and the cylinder 14 is installed in the third module C. All parts are installed in the three modules, so that the assembly, disassembly and maintenance are facilitated.
In another embodiment, referring to fig. 2, the unidirectional throttling load sensing electro-hydrostatic actuator further includes a controller 18 and a motor driver 17, the controller 18 is connected to the load sensing pump 1 through the motor driver 17, the load sensing pump is provided with a speed sensor, the speed sensor is connected to the motor driver 17 and used for speed feedback, an output line of the motor driver 17 is further provided with a current sensor, the current sensor is connected to the motor driver 17 and used for current feedback, two interface pipelines of the unidirectional throttling load sensing module are both provided with a pressure sensor, and both the two pressure sensors 18 are connected to the controller and used for detecting pressures on the two interface pipelines of the unidirectional throttling load sensing module and used for pressure feedback; the position of the extension rod of the cylinder 14 may also be equipped with a position sensor for detecting the position of the extension rod of the cylinder and feeding back to the controller to facilitate position feedback.
In the present disclosure, forward and reverse rotation of the load sensitive pump can achieve forward and reverse movement of the cylinder. The load pressure of the actuating cylinder is fed back to the variable cylinder of the load sensitive pump through the newly added one-way throttling load sensitive module, so that the variable of the load sensitive pump is realized. The one-way throttling load sensing module comprises a throttling hole and a one-way valve which are connected in parallel. The one-way throttling load sensing module realizes the connection between the load pressure and the variable actuating cylinder of the load sensing pump. When the load is rapidly increased, pressure medium enters a variable actuating cylinder of the load sensitive pump through the one-way throttling load sensitive module, so that the displacement of the variable pump is reduced, the one-way valve is closed, the pressure medium can only enter the variable actuating cylinder through the throttling hole, the angle of a swash plate of the load sensitive pump is slowly reduced, the displacement of the load sensitive pump is not rapidly reduced when the load is rapidly increased, and the rigidity of the electro-hydrostatic actuator is kept; when the load becomes smaller, the pressure medium of the variable actuating cylinder of the load sensitive pump flows out through the one-way valve in the parallel oil circuit of the one-way throttling load sensitive module, the angle of the swash plate of the load sensitive pump can be quickly increased, the displacement of the pump is quickly increased, and the response speed of the electro-hydrostatic actuator is improved. The invention can lead the electro-hydrostatic actuator to have both high energy efficiency and high dynamic,
in the description of the present specification, reference to the description of "one embodiment/mode", "some embodiments/modes", "example", "specific example", or "some examples" or the like means that a particular feature, structure, material, or characteristic described in connection with the embodiment/mode or example is included in at least one embodiment/mode or example of the present application. In this specification, the schematic representations of the terms used above are not necessarily intended to be the same embodiment/mode or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/aspects or examples and features of the various embodiments/aspects or examples described in this specification can be combined and combined by one skilled in the art without conflicting therewith.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
It will be understood by those skilled in the art that the foregoing embodiments are merely for clarity of illustration of the disclosure and are not intended to limit the scope of the disclosure. Other variations or modifications may occur to those skilled in the art, based on the foregoing disclosure, and are still within the scope of the present disclosure.
Claims (10)
1. A one-way throttling load-sensitive electro-hydrostatic actuator is characterized by comprising a motor, a load-sensitive pump, an actuating cylinder and a one-way throttling load-sensitive module;
the motor is in power connection with the load-sensitive pump, one end of the load-sensitive pump is communicated with the first cavity of the actuating cylinder through a first pipeline, the second end of the load-sensitive pump is communicated with the second cavity of the actuating cylinder through a second pipeline,
the control end of the load sensitive pump is respectively connected with the first pipeline and the second pipeline through a one-way throttling load sensitive module;
when the unidirectional throttling load sensing module is in a first working mode, media in pipelines with relatively high pressure in the first pipeline and the second pipeline are introduced into the control end of the load sensing pump through the unidirectional throttling load sensing module;
when the one-way throttling load sensing module is in a second working mode, the medium of the load sensing pump is introduced into a pipeline with relatively low pressure in the first pipeline or the second pipeline through the one-way throttling load sensing module.
2. The one-way throttling load-sensing electro-hydrostatic actuator of claim 1, wherein the one-way throttling load-sensing module includes a shuttle valve, a first throttling valve, and a second throttling valve;
the first inlet of the shuttle valve is communicated with the first pipeline, the second inlet of the shuttle valve is communicated with the second pipeline, the outlet of the shuttle valve is communicated with the first pipeline through the first throttling valve, the outlet of the shuttle valve is connected with the second pipeline through the second throttling valve, and the outlet of the shuttle valve is communicated with the control end of the load-sensitive pump.
3. A one-way throttle load sensitive electro-hydrostatic actuator as set forth in claim 2, wherein: the one-way throttling load sensing module further comprises a third throttling valve and a third one-way valve connected in parallel with the third throttling valve,
the outlet of the shuttle valve is communicated with the control end of the load-sensitive pump through a third throttling valve, and the outlet of the shuttle valve is also communicated with the control end of the load-sensitive pump in a one-way mode through a third one-way valve.
4. A one-way throttle load sensitive electro-hydrostatic actuator as set forth in claim 3, wherein: the liquid supplementing oil tank, the first check valve and the second check valve are further included;
the outlet of the shuttle valve is communicated with the liquid supplementing oil tank, the outlet of the shuttle valve is also communicated with the first pipeline through a first one-way valve, and the outlet of the shuttle valve is also communicated with the second pipeline through a second one-way valve.
5. A one-way throttle load sensitive electro-hydrostatic actuator as set forth in claim 1, wherein: the first pipeline is communicated with the second pipeline through the fourth throttling valve.
6. A one-way throttle load sensitive electro-hydrostatic actuator as set forth in claim 1, wherein: the first pipeline is communicated with the second pipeline through the first overflow valve, and the first overflow valve is used for overflowing oil of the first pipeline to the second pipeline.
7. A one-way throttle load sensitive electro-hydrostatic actuator as set forth in claim 1, wherein: the second pipeline is communicated with the first pipeline through the second overflow valve, and the second overflow valve is used for overflowing oil of the second pipeline to the first pipeline.
8. A one-way throttle load sensitive electro-hydrostatic actuator as set forth in claim 1, wherein: the motor is a brushless dc motor.
9. A unidirectional throttling load sensitive electro-hydrostatic actuator as claimed in claim 1, wherein: the load sensitive pump is a variable plunger pump, and the control end of the load sensitive pump is communicated with the swash plate control end of the variable plunger pump.
10. A one-way throttle load sensitive electro-hydrostatic actuator as set forth in claim 1, wherein: the one-way throttling load sensitive electro-hydrostatic actuator comprises a first module, a second module and a third module which are sequentially connected; the motor is installed in the first module, the load sensing pump and the one-way throttling load sensing module are installed in the second module, and the actuating cylinder is installed in the third module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210351756.5A CN114893456B (en) | 2022-04-02 | 2022-04-02 | One-way throttling load sensitive electro-hydrostatic actuator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210351756.5A CN114893456B (en) | 2022-04-02 | 2022-04-02 | One-way throttling load sensitive electro-hydrostatic actuator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114893456A true CN114893456A (en) | 2022-08-12 |
| CN114893456B CN114893456B (en) | 2023-02-17 |
Family
ID=82714947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210351756.5A Active CN114893456B (en) | 2022-04-02 | 2022-04-02 | One-way throttling load sensitive electro-hydrostatic actuator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114893456B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080236156A1 (en) * | 2007-03-30 | 2008-10-02 | Atsushi Kakino | Electro hydrostatic actuator with swash plate pump |
| CN104728195A (en) * | 2015-03-18 | 2015-06-24 | 北京航空航天大学 | Load-sensitive electro-hydrostatic actuator |
| CN104747514A (en) * | 2015-03-18 | 2015-07-01 | 北京航空航天大学 | Electro-hydrostatic actuator sensitive to load |
| CN104819176A (en) * | 2015-03-18 | 2015-08-05 | 北京航空航天大学 | Load-sensitive electro-hydrostatic actuator |
| EP3112699A1 (en) * | 2015-06-30 | 2017-01-04 | Goodrich Actuation Systems SAS | Electro hydrostatic actuators |
| CN108591193A (en) * | 2018-05-25 | 2018-09-28 | 北京航空航天大学 | Electric hydrostatic actuator system with energy-recuperation system |
-
2022
- 2022-04-02 CN CN202210351756.5A patent/CN114893456B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20080236156A1 (en) * | 2007-03-30 | 2008-10-02 | Atsushi Kakino | Electro hydrostatic actuator with swash plate pump |
| CN104728195A (en) * | 2015-03-18 | 2015-06-24 | 北京航空航天大学 | Load-sensitive electro-hydrostatic actuator |
| CN104747514A (en) * | 2015-03-18 | 2015-07-01 | 北京航空航天大学 | Electro-hydrostatic actuator sensitive to load |
| CN104819176A (en) * | 2015-03-18 | 2015-08-05 | 北京航空航天大学 | Load-sensitive electro-hydrostatic actuator |
| EP3112699A1 (en) * | 2015-06-30 | 2017-01-04 | Goodrich Actuation Systems SAS | Electro hydrostatic actuators |
| CN108591193A (en) * | 2018-05-25 | 2018-09-28 | 北京航空航天大学 | Electric hydrostatic actuator system with energy-recuperation system |
Non-Patent Citations (2)
| Title |
|---|
| 习仁国等: "电静液作动器的建模仿真与试验研究", 《机床与液压》 * |
| 纪友哲等: "EHA作动器的阀泵联合控制方案研究", 《液压气动与密封》 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114893456B (en) | 2023-02-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100424361C (en) | Closed electrohydraulic controlling system | |
| KR102317791B1 (en) | Electric-actuated pressure regulator- and volume-delivery units | |
| CN102226453B (en) | Dual-redundancy electro hydraulic servo actuator | |
| CN102011767B (en) | Hydraulic system | |
| CN105952713B (en) | A kind of hydraulic cylinder pilot system and method for testing | |
| CN108533546B (en) | Hydraulic excavator power system adopting double-pump direct drive and differential fast forward automatic switching | |
| CN115076162B (en) | Double-pump double-loop electro-hydraulic load sensing system with independently controlled valve ports and control method | |
| US10801616B2 (en) | Hydrostatic drive | |
| CN113669312A (en) | Closed hydraulic control system and engineering machinery | |
| US20140060034A1 (en) | Electro-Hydraulic Control Design for Pump Discharge Pressure Control | |
| CN114893456B (en) | One-way throttling load sensitive electro-hydrostatic actuator | |
| KR20120051722A (en) | Hydraulic power module | |
| CN107524641B (en) | Independent integrated hydraulic linear driving system | |
| CN107761804B (en) | Multi-pressure-level hydraulic excavator power source system | |
| CN112930446A (en) | Hydraulic system | |
| US20240209873A1 (en) | Electro-Hydraulic Power Unit with Variable Output Flow | |
| JP2011038558A (en) | Electric fluid pressure actuator device | |
| CN108953306A (en) | Duplex pump directly driven volume controlled electro-hydraulic servo control system | |
| CN103711172A (en) | Loader four-pump quantitative confluence hydraulic system | |
| CN107448440B (en) | Back pressure and the electric-hydraulic combined regulation multi executors system of power oil | |
| CN107842537B (en) | End cover assembly, hydraulic equipment and engineering machinery | |
| CN107701531B (en) | Power and the electro-hydraulic combination of rigidity and flexibility of back pressure oil regulate and control multi executors system | |
| CN220769824U (en) | Hydraulic system | |
| CN216241552U (en) | Pumping hydraulic system and wet spraying machine | |
| CN215596034U (en) | Load sensitive hydraulic system for foam molding machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |