CN117145818A - Hydraulic system of servo electro-hydraulic actuator - Google Patents

Hydraulic system of servo electro-hydraulic actuator Download PDF

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Publication number
CN117145818A
CN117145818A CN202311190943.0A CN202311190943A CN117145818A CN 117145818 A CN117145818 A CN 117145818A CN 202311190943 A CN202311190943 A CN 202311190943A CN 117145818 A CN117145818 A CN 117145818A
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CN
China
Prior art keywords
valve
stop valve
electromagnetic stop
oil
hydraulic
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.)
Pending
Application number
CN202311190943.0A
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Chinese (zh)
Inventor
王刚
于善利
毛波
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Shandong Wantong Hydraulic Co ltd
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Shandong Wantong Hydraulic Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
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Priority to CN202311190943.0A priority Critical patent/CN117145818A/en
Publication of CN117145818A publication Critical patent/CN117145818A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • 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
    • 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
    • F15B1/024—Installations or systems with accumulators used as a supplementary power source, e.g. to store energy in idle periods to balance pump load
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • 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
    • F15B20/00—Safety arrangements for fluid actuator systems; Applications of safety devices in fluid actuator systems; Emergency measures for fluid actuator systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B13/00—Details of servomotor systems ; Valves for servomotor systems
    • F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
    • F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
    • F15B13/044—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by electrically-controlled means, e.g. solenoids, torque-motors
    • F15B2013/0448—Actuation by solenoid and permanent magnet
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20507—Type of prime mover
    • F15B2211/20515—Electric motor
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B2211/00—Circuits for servomotor systems
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/21—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge
    • F15B2211/212—Systems with pressure sources other than pumps, e.g. with a pyrotechnical charge the pressure sources being 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
    • 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
    • F15B2211/775—Combined control, e.g. control of speed and force for providing a high speed approach stroke with low force followed by a low speed working stroke with high force, e.g. for a hydraulic press
    • 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
    • F15B2211/80—Other types of control related to particular problems or conditions
    • F15B2211/86—Control during or prevention of abnormal conditions
    • F15B2211/863—Control during or prevention of abnormal conditions the abnormal condition being a hydraulic or pneumatic failure

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

The invention discloses a hydraulic system of a servo electro-hydraulic actuator, which relates to the technical field of hydraulic systems and comprises the following components: the hydraulic pressure control system comprises a servo motor, an oil pump, an actuator body, a first electromagnetic stop valve, a second electromagnetic stop valve, a third electromagnetic stop valve, a fourth electromagnetic stop valve, a first safety relief valve, a second safety relief valve, a first one-way valve, a second one-way valve, a third one-way valve, a first pressure transmitter, a second pressure transmitter, a third pressure transmitter, an energy accumulator, an oil circuit integrated block, a pump frame coupler, a displacement sensor and other hydraulic accessories. When the servo electrohydraulic actuator hydraulic system is used, the hydraulic system is matched with the first electromagnetic stop valve, the second electromagnetic stop valve, the third electromagnetic stop valve and the fourth electromagnetic stop valve, so that the action and the pressure maintaining performance of the actuator body are well realized, and the actuator body is in a floating state when faults occur, and the parts cannot be locked.

Description

Hydraulic system of servo electro-hydraulic actuator
Technical Field
The invention relates to the technical field of hydraulic systems, in particular to a hydraulic system of a servo electro-hydraulic actuator.
Background
The servo electrohydraulic actuator body is used in the high-end military field such as aerospace, navigation and the like, and has the advantages of high control precision, high reliability, large thrust, backup and the like.
At present, most of electric cylinders are adopted as executing elements, gears and screw rods are in clearance transmission, the action is unstable, the service life is low, the self-locking is realized once faults occur, other backups cannot work, the reliability is reduced, and the electric cylinder cannot be used in occasions needing backups.
We have therefore proposed a servo electro-hydraulic actuator hydraulic system to address the problems set out above.
Disclosure of Invention
The invention aims to provide a hydraulic system of a servo electro-hydraulic actuator, which solves the problems that in the prior art, an electric cylinder is mostly adopted as an executing element, a gear and a screw are in clearance transmission, the action is unstable, the service life is low, the self-locking is realized once the fault occurs, and other backups cannot work.
In order to achieve the above purpose, the present invention provides the following technical solutions: a servo electro-hydraulic actuator hydraulic system, comprising: the hydraulic oil pump comprises a servo motor, an oil pump, an actuator body, a first electromagnetic stop valve, a second electromagnetic stop valve, a third electromagnetic stop valve, a fourth electromagnetic stop valve, a first safety relief valve, a second safety relief valve, a first one-way valve, a second one-way valve, a third one-way valve, a first pressure transmitter, a second pressure transmitter, a third pressure transmitter, an energy accumulator, an oil circuit integrated block, a pump frame coupler, a displacement sensor and other hydraulic accessories, wherein an oil discharge port of the oil pump is communicated with the first one-way valve through a connecting block, and the other end of the first one-way valve is respectively communicated with one ends of the energy accumulator, the third pressure transmitter, the second one-way valve, the third one-way valve, the first safety relief valve, the second safety relief valve and the fourth electromagnetic stop valve.
Preferably, the servo motor and the oil pump are connected through a pump frame coupler to form a motor pump set, the oil outlet of the oil pump is divided into an oil outlet A and an oil outlet B, and the oil pump can select a required oil outlet when rotating along with the pump frame coupler by dividing the oil pump into two oil outlets.
Preferably, the oil outlet a of the oil pump is respectively communicated with one ends of the third electromagnetic stop valve, the fourth electromagnetic stop valve, the third one-way valve and the second safety overflow valve through the oil path integrated block, the oil discharged from the oil outlet a of the oil pump can pass through the third electromagnetic stop valve, the fourth electromagnetic stop valve, the third one-way valve and the second safety overflow valve when flowing through the oil path integrated block, and the third electromagnetic stop valve, the fourth electromagnetic stop valve, the third one-way valve and the second safety overflow valve are selectively opened or closed according to the use condition.
Preferably, the other end of the third electromagnetic stop valve is respectively communicated with one ends of the second pressure transmitter, the second electromagnetic stop valve and the actuator body, and the actuator is characterized in that the actuator body is provided with a large cross-sectional area cavity, the fourth electromagnetic stop valve can release redundant oil to the accumulator, and the third electromagnetic stop valve, the second pressure transmitter, the second electromagnetic stop valve and the actuator body can be selectively opened and closed according to the use condition through the passage.
Preferably, the oil outlet B of the oil pump is respectively communicated with the second one-way valve, the first safety relief valve and the first electromagnetic stop valve through the oil way integrated block, the oil discharged from the oil outlet B of the oil pump can pass through the second one-way valve, the first safety relief valve and the first electromagnetic stop valve when flowing through the oil way integrated block, and the second one-way valve, the first safety relief valve and the first electromagnetic stop valve are selectively opened or closed according to the use condition.
Preferably, the other end of the first electromagnetic stop valve is respectively communicated with one ends of the first pressure transmitter, the second electromagnetic stop valve and the actuator body, and the actuator is characterized in that the cross section area of the actuator body is small, and the first electromagnetic stop valve, the first pressure transmitter, the second electromagnetic stop valve and the actuator body can be selectively opened and closed according to the use condition through the passage.
Preferably, the second electromagnetic stop valve, the third electromagnetic stop valve and the fourth electromagnetic stop valve are opened to enable the actuator body to be in a backup floating state, and the actuator body is in the backup floating state so that parts cannot be locked, and therefore other mechanisms cannot be influenced to continuously control execution parts.
Preferably, because the volume difference exists in the oil storage of the large cavity and the small cavity of the actuator body of the closed system and the accumulator is required to be recovered, the first check valve is arranged to prevent the misoperation from forming a high-pressure damaged oil pump, the closed-loop control system is adopted to increase the oil quantity of the section difference of the storage actuator body 13 of the accumulator 1, the storage actuator can be placed and rotated in any space, the oil leakage and the suction phenomenon can not occur, and the oil pump 4 is reliably and effectively protected.
Compared with the prior art, the invention has the beneficial effects that:
1. when the hydraulic system is used, the hydraulic system is matched with the first electromagnetic stop valve, the second electromagnetic stop valve, the third electromagnetic stop valve and the fourth electromagnetic stop valve, so that the action and the pressure maintaining performance of the actuator body are well realized, the actuator body is in a floating state when faults occur, parts cannot be locked, and other mechanisms cannot be influenced to continuously control executive parts.
2. When the closed-loop control system is used, the oil quantity of the accumulated difference of the section of the body of the energy accumulator storage and compensation actuator is increased, the energy accumulator storage and compensation actuator can be placed and rotated in any space, and oil leakage and air suction phenomena can not occur.
3. When the push-pull actuator is used, the servo motor is used for controlling the speed and stability of the actuator body, so that the impact of push-pull execution action is avoided.
Drawings
FIG. 1 is a hydraulic schematic diagram of a servo electro-hydraulic actuator hydraulic system of the present invention.
In the figure:
1. an accumulator; 2. an oil path integration block; 3. a servo motor; 4. an oil pump; 5. a pump frame coupler; 6. a first one-way valve; 7. a second one-way valve; 8. a third one-way valve; 9. a first safety relief valve; 10. a first electromagnetic shut-off valve; 11. a first pressure transmitter; 12. a second electromagnetic shut-off valve; 13. an actuator body; 14. a displacement sensor; 15. a second pressure transmitter; 16. a third electromagnetic shut-off valve; 17. a second safety relief valve; 18. a fourth electromagnetic shut-off valve; 19. and a third pressure transmitter.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1, the present invention provides a technical solution: a servo electro-hydraulic actuator hydraulic system, comprising: the hydraulic oil pump comprises a servo motor 3, an oil pump 4, an actuator body 13, a first electromagnetic stop valve 10, a second electromagnetic stop valve 12, a third electromagnetic stop valve 16, a fourth electromagnetic stop valve 18, a first safety relief valve 9, a second safety relief valve 17, a first check valve 6, a second check valve 7, a third check valve 8, a first pressure transmitter 11, a second pressure transmitter 15, a third pressure transmitter 19, an accumulator 1, an oil circuit integrated block 2, a pump frame coupler 5, a displacement sensor 14 and other hydraulic accessories, wherein an oil discharge port of the oil pump 4 is communicated with the first check valve 6 through a connecting block, and the other end of the first check valve 6 is respectively communicated with one ends of the accumulator 1, the third pressure transmitter 19, the second check valve 7, the third check valve 8, the first safety relief valve 9, the second safety relief valve 17 and the fourth electromagnetic stop valve 18.
As shown in fig. 1, the servo motor 3 and the oil pump 4 are connected through the pump frame coupling 5 to form a motor pump set, the oil outlet of the oil pump 4 is divided into an oil outlet a and an oil outlet B, and by dividing the oil pump 4 into two oil outlets, the oil pump 4 can select a required oil outlet when rotating along with the pump frame coupling 5.
As shown in fig. 1, the oil outlet a of the oil pump 4 communicates with one ends of the third electromagnetic cut-off valve 16, the fourth electromagnetic cut-off valve 18, the third check valve 8 and the second relief valve 17, respectively, through the oil passage integration block 2, by which the oil discharged from the oil outlet a of the oil pump 4 can pass through the third electromagnetic cut-off valve 16, the fourth electromagnetic cut-off valve 18, the third check valve 8 and the second relief valve 17 when circulating, and the third electromagnetic cut-off valve 16, the fourth electromagnetic cut-off valve 18, the third check valve 8 and the second relief valve 17 are selectively opened or closed according to the use condition.
As shown in fig. 1, the other end of the third electromagnetic stop valve 16 is respectively communicated with one ends of the second pressure transmitter 15, the second electromagnetic stop valve 12 and the actuator body 13, and is characterized in that the actuator body 13 has a large cross-sectional area, the fourth electromagnetic stop valve 18 can release excessive oil to the accumulator 1, and the third electromagnetic stop valve 16, the second pressure transmitter 15, the second electromagnetic stop valve 12 and the actuator body 13 can be selectively opened and closed according to the use condition through the passage.
As shown in fig. 1, the oil outlet B of the oil pump 4 communicates with the second check valve 7, the first relief valve 9, and the first electromagnetic cut-off valve 10 through the oil passage integration block 2, respectively, by which the oil discharged from the oil outlet B of the oil pump 4 can pass through the second check valve 7, the first relief valve 9, and the first electromagnetic cut-off valve 10 while circulating, and the second check valve 7, the first relief valve 9, and the first electromagnetic cut-off valve 10 are selectively opened or closed according to the use condition.
As shown in fig. 1, the other end of the first electromagnetic stop valve 10 is respectively communicated with one ends of the first pressure transmitter 11, the second electromagnetic stop valve 12 and the actuator body 13, and is characterized in that the actuator body 13 has a small cross-sectional area cavity, and the first electromagnetic stop valve 10, the first pressure transmitter 11, the second electromagnetic stop valve 12 and the actuator body 13 can be selectively opened and closed according to the use condition through the passage.
As shown in fig. 1, the second electromagnetic stop valve 12, the third electromagnetic stop valve 16 and the fourth electromagnetic stop valve 18 are opened to enable the actuator body 13 to be in a backup floating state, and the actuator body 13 is in the backup floating state, so that parts cannot be locked, and other mechanisms cannot be influenced to continuously control execution parts.
As shown in fig. 1, because the volume difference exists in the oil storage of the large cavity and the small cavity of the actuator body 13 of the closed system, the accumulator 1 is required to be recovered, the first check valve 6 is arranged to prevent the misoperation from forming the high-pressure damage oil pump 4, and the closed-loop control system is adopted to increase the oil quantity of the accumulator 1 for supplementing the area difference of the section of the actuator body 13, so that the closed-loop control system can be placed and rotated in any space, the oil leakage and the suction phenomenon can not occur, and the closed-loop control system has reliable and effective protection effect on the oil pump 4.
The application method and the working principle of the device are as follows: when in use, when the servo motor 3 is electrified, the oil outlet A and the oil outlet B of the oil pump 4 are driven by right rotation, then the pressure oil of the oil outlet A enters the oil way integrated block 2, when the servo motor 3 is electrified, the third electromagnetic stop valve 16 and the first electromagnetic stop valve 10 are electrified, the pressure oil of the small cavity of the actuator body 13 enters the large cavity of the actuator body 13, the pressure oil returns to the oil outlet B of the pump 4 through the first electromagnetic stop valve 10, the speed, the position and the pressure monitoring of the oil outlet of the actuator body 13 are controlled through the servo motor 3, the displacement sensor 14 and the second pressure transmitter 15, when the oil outlet B of the oil pump 4 is not fully supplied, the oil is driven by left rotation through the second one-way valve 7 of the energy accumulator 1 to the oil outlet B of the oil pump 4, when the servo motor 3 is electrified, the oil outlet B and the oil outlet A are driven by left rotation, then the pressure oil outlet B enters the oil way integrated block 2, when the first electromagnetic stop valve 10, the third electromagnetic stop valve 16 and the fourth electromagnetic stop valve 18 are electrified, the pressure oil enters the small cavity of the actuator body 13, the pressure oil of the large cavity of the actuator body 13 returns to the oil pump 4 through the third electromagnetic stop valve 16, the oil return to the oil pump 4A is controlled by the servo motor 3, the pressure oil outlet B is driven by the pressure oil pump 12, the pressure oil inlet B is driven by the pressure oil outlet B of the pressure valve 12 and the pressure sensor 12 when the servo motor 1 and the pressure oil outlet B is electrified, the pressure oil enters the large cavity of the actuator body 13, and the pressure oil cavity of the differential actuator body 13 through the pressure valve 12A is controlled by the pressure valve 12, and the pressure valve 12A and the pressure valve 12 is controlled by the pressure valve 12, the rod outlet speed, position and pressure of the actuator body 13 are controlled by the servo motor 3, the displacement sensor 14 and the second pressure transmitter 15, when the oil outlet B of the oil pump 4 is insufficient in oil supply, the oil outlet B of the oil pump 4 is replenished by the second one-way valve 7 of the energy accumulator 1, and when the servo motor 3 does not work, the second electromagnetic stop valve 12, the third electromagnetic stop valve 16 and the fourth electromagnetic stop valve 18 are electrified to enable the actuator body 13 to be in a floating backup state.
The wiring diagrams of the servo motor 3, the oil pump 4, the first electromagnetic cut-off valve 10, the first pressure transmitter 11, the second electromagnetic cut-off valve 12, the actuator body 13, the displacement sensor 14, the second pressure transmitter 15, the third electromagnetic cut-off valve 16, the fourth electromagnetic cut-off valve 18 and the third pressure transmitter 19 in the present invention are known in the art, and the working principle thereof is a known technology, and the model thereof is selected to be suitable according to the actual use, so that the control mode and the wiring arrangement will not be explained in detail for the servo motor 3, the oil pump 4, the first electromagnetic cut-off valve 10, the first pressure transmitter 11, the second electromagnetic cut-off valve 12, the actuator body 13, the displacement sensor 14, the second pressure transmitter 15, the third electromagnetic cut-off valve 16, the fourth electromagnetic cut-off valve 18 and the third pressure transmitter 19.
Although the present invention has been described with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described, or equivalents may be substituted for elements thereof, and any modifications, equivalents, improvements and changes may be made without departing from the spirit and principles of the present invention.

Claims (8)

1. A servo electro-hydraulic actuator hydraulic system, comprising:
the hydraulic oil pump comprises a servo motor (3), an oil pump (4), an actuator body (13), a first electromagnetic stop valve (10), a second electromagnetic stop valve (12), a third electromagnetic stop valve (16), a fourth electromagnetic stop valve (18), a first safety relief valve (9), a second safety relief valve (17), a first one-way valve (6), a second one-way valve (7), a third one-way valve (8), a first pressure transmitter (11), a second pressure transmitter (15), a third pressure transmitter (19), an energy accumulator (1), an oil circuit integrated block (2), a pump frame coupler (5), a displacement sensor (14) and other hydraulic accessories, wherein an oil unloading port of the oil pump (4) is communicated with the first one-way valve (6) through a connecting block, and the other end of the first one-way valve (6) is respectively communicated with one ends of the energy accumulator (1), the third one-way valve (19), the second one-way valve (7), the third one-way valve (8), the first safety relief valve (9), the second safety relief valve (17) and the fourth electromagnetic stop valve (18).
2. The servo electro-hydraulic actuator hydraulic system of claim 1, wherein: the servo motor (3) is connected with the oil pump (4) through a pump frame coupler (5) to form a motor pump set, and an oil outlet of the oil pump (4) is divided into an oil outlet A and an oil outlet B.
3. The servo electro-hydraulic actuator hydraulic system of claim 2, wherein: an oil outlet A of the oil pump (4) is respectively communicated with one ends of a third electromagnetic stop valve (16), a fourth electromagnetic stop valve (18), a third one-way valve (8) and a second safety overflow valve (17) through an oil way integrated block (2).
4. The servo electro-hydraulic actuator hydraulic system of claim 3, wherein: the other end of the third electromagnetic stop valve (16) is respectively communicated with the second pressure transmitter (15), the second electromagnetic stop valve (12) and one end of the actuator body (13), and is characterized in that the actuator body (13) is provided with a large cross-sectional area cavity, and the fourth electromagnetic stop valve (18) can release redundant oil to the accumulator (1).
5. The servo electro-hydraulic actuator hydraulic system of claim 4, wherein: an oil outlet B of the oil pump (4) is respectively communicated with a second one-way valve (7), a first safety overflow valve (9) and a first electromagnetic stop valve (10) through an oil way integrated block (2).
6. The servo electro-hydraulic actuator hydraulic system of claim 5, wherein: the other end of the first electromagnetic stop valve (10) is respectively communicated with the first pressure transmitter (11), the second electromagnetic stop valve (12) and one end of the actuator body (13), and is characterized in that the actuator body (13) is a small cavity with a small sectional area.
7. The servo electro-hydraulic actuator hydraulic system of claim 6, wherein: the second electromagnetic stop valve (12), the third electromagnetic stop valve (16) and the fourth electromagnetic stop valve (18) are opened to enable the actuator body (13) to be in a backup floating state.
8. The servo electro-hydraulic actuator hydraulic system of claim 7, wherein: because the oil storage of the big and small cavities of the closed system actuator body (13) has volume difference, the energy accumulator (1) is required to be recovered, and the first one-way valve (6) is arranged to avoid the misoperation to form the high-pressure damage oil pump (4).
CN202311190943.0A 2023-09-14 2023-09-14 Hydraulic system of servo electro-hydraulic actuator Pending CN117145818A (en)

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Application Number Priority Date Filing Date Title
CN202311190943.0A CN117145818A (en) 2023-09-14 2023-09-14 Hydraulic system of servo electro-hydraulic actuator

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Application Number Priority Date Filing Date Title
CN202311190943.0A CN117145818A (en) 2023-09-14 2023-09-14 Hydraulic system of servo electro-hydraulic actuator

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104595289A (en) * 2015-01-28 2015-05-06 北京航空航天大学 Double-redundancy electro-hydrostatic actuator (EHA)
CN108506286A (en) * 2018-07-02 2018-09-07 福建工程学院 A kind of driving motor directly drives the hydraulic energy-saving system of pump control cylinder with differential effect

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104595289A (en) * 2015-01-28 2015-05-06 北京航空航天大学 Double-redundancy electro-hydrostatic actuator (EHA)
CN108506286A (en) * 2018-07-02 2018-09-07 福建工程学院 A kind of driving motor directly drives the hydraulic energy-saving system of pump control cylinder with differential effect

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