CN115978025A - Voice coil motor-driven double-cavity pump control actuator and working method thereof - Google Patents
Voice coil motor-driven double-cavity pump control actuator and working method thereof Download PDFInfo
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- CN115978025A CN115978025A CN202211741944.5A CN202211741944A CN115978025A CN 115978025 A CN115978025 A CN 115978025A CN 202211741944 A CN202211741944 A CN 202211741944A CN 115978025 A CN115978025 A CN 115978025A
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Abstract
The invention discloses a voice coil motor-driven double-cavity pump control actuator and a working method thereof, and relates to the field of electro-hydraulic actuators, wherein the voice coil motor-driven double-cavity pump control actuator comprises the following components: the piston, a pump cover plate, pump heads, a coil framework, a fastening nut, magnetic steel, an isolating ring, a coil, an iron core, a mandrel, a shell, a displacement sensor, a rear plug, an energy accumulator, a hydraulic cylinder, a first one-way control valve, a second one-way control valve, a third one-way control valve and a fourth one-way control valve, wherein two pump cavities are formed by the piston and the pump heads, the piston is servo-driven by a voice coil motor, the two pump cavities alternately pump out flow in a high frequency mode in parallel, the two pump cavities are rectified by the one-way control valves, two movements of the hydraulic cylinder are realized in one period, and the power-weight ratio of an actuator can be improved.
Description
Technical Field
The invention relates to the technical field of electro-hydraulic actuators, in particular to a voice coil motor-driven double-cavity pump control actuator and a working method thereof.
Background
In the field of aviation, an electro-hydraulic actuator is a driving structure for positions of airplane control surface actuation, undercarriage retraction, engine fuel regulation, nozzle vector control and the like, is developed towards the direction of integration at present, and becomes a research hotspot with the proposal of a power telex concept, and the electro-hydraulic actuator is a closed local hydraulic volume control system with a structure of high integration of a motor, a pump, a hydraulic valve and a hydraulic cylinder.
The invention discloses an intelligent material driven double-pump integrated electro-hydrostatic actuator and a working method thereof, and the patent 201911081525.1 adopts a design form of double-pump series and parallel drive, so that the flow pressure output performance of the actuator can be improved, and a good effect is achieved. However, the parallel structure of the dual-drive pump occupies a larger space layout, and brings a larger weight, and the structural form of the voice coil motor pump control actuator is not available at present.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a voice coil motor-driven dual-cavity pump control actuator and a working method thereof.
In order to achieve the purpose, the voice coil motor-driven dual-cavity pump control actuator and the working method thereof provided by the invention adopt the following technical scheme:
a voice coil motor driven dual chamber pump controlled actuator comprising: the device comprises a piston, a pump cover plate, a pump head, a coil framework, a fastening nut, magnetic steel, an isolating ring, a coil, an iron core, a mandrel, a shell, a displacement sensor, a rear plug, an energy accumulator, a hydraulic cylinder, a first one-way control valve, a second one-way control valve, a third one-way control valve and a fourth one-way control valve;
the bottom end of the piston is fixedly connected with the coil framework through a set nut, a coil is wound on the outer side of the coil framework, the inner side of the coil framework is in clearance fit with the mandrel, the outer side of the coil is in clearance fit with the inner hole of the isolating ring, the outer side of the isolating ring is tightly attached to the inner side of the magnetic steel, the outer side of the magnetic steel is tightly attached to the inner hole of the shell, the mandrel is arranged in the inner hole of the shell in an interference fit manner, the displacement sensor is arranged in the inner hole of the mandrel through threads, the upper end of the iron core is in threaded connection with the piston, the lower end of the iron core is arranged in the inner hole of the displacement sensor, the shell is connected with the pump head through a screw, and the pump cover plate is arranged in the inner hole of the pump head through threads;
a first pump cavity is formed in an area between the piston and the bottom surface of an inner hole of the pump head, a first oil outlet and a first oil inlet are formed in the first pump cavity, the first oil outlet is communicated with a high-pressure cavity of the hydraulic cylinder through a first one-way control valve, and the first oil inlet is communicated with a low-pressure cavity of the hydraulic cylinder through a second one-way control valve;
a second pump cavity is formed in the area between the piston and the pump cover plate, a second oil outlet and a second oil inlet are formed in the second pump cavity, the second oil outlet is communicated with a high-pressure cavity of the hydraulic cylinder through a third one-way control valve, and the second oil outlet is communicated with a low-pressure cavity of the hydraulic cylinder through a fourth one-way control valve;
furthermore, the first one-way control valve and the third one-way control valve have the same function, and the second one-way control valve and the fourth one-way control valve have the same function, and can be either passive one-way valves or active one-way valves or high-speed switching valves;
furthermore, the first one-way control valve only allows oil to flow from the first oil outlet to the high-pressure cavity and be cut off reversely, the second one-way control valve allows oil to flow from the low-pressure cavity to the first oil inlet and be cut off reversely, the third one-way control valve allows oil to flow from the second oil outlet to the high-pressure cavity and be cut off reversely, and the fourth one-way control valve allows oil to flow from the low-pressure cavity to the second oil inlet and be cut off reversely;
further, the accumulator is mounted on an oil line connecting the high pressure chambers for a given system bias; furthermore, the inner ring of the magnetic steel has N-pole polarity, and the outer ring has S-pole polarity;
further, the coil is fed with a positive electric signal to generate a magnetic field with an N pole facing downwards and an S pole facing upwards, and a negative electric signal is fed to generate a magnetic field with an S pole facing downwards and an N pole facing upwards;
the invention also discloses a working method of the voice coil motor-driven double-cavity actuator, which comprises the following steps:
when a positive value signal in a period is given by the coil, according to the ampere force rule, the coil is subjected to an upward ampere force along the axial direction of the coil, the coil framework drives the piston to move upwards, the volume of the first pump cavity is reduced, fluid is discharged through the first oil outlet and the one-way control valve and enters the high-pressure cavity, the hydraulic cylinder moves rightwards, the volume of the second pump cavity is increased, the fluid in the low-pressure cavity is sucked by the second pump cavity through the one-way control valve and the second oil inlet, the whole process finishes one-time action of the hydraulic cylinder, and the displacement sensor feeds back position information of the piston in the pump cavity in real time;
when a negative signal in a period is given by the coil, according to the ampere force rule, the coil is subjected to an ampere force which is downward along the axial direction of the coil, the coil framework drives the piston to move downward, the volume of the second pump cavity is reduced, fluid is discharged through the second oil outlet and the one-way control valve and enters the high-pressure cavity, the hydraulic cylinder is enabled to move rightward, the volume of the first pump cavity is increased, the fluid in the low-pressure cavity is sucked by the first pump cavity through the one-way control valve and the second oil inlet, the whole process finishes one-time actuation of the hydraulic cylinder, and the displacement sensor feeds back position information of the piston in the pump cavity in real time;
in the working process, the controller collects a real-time feedback piston position signal of the displacement sensor and a displacement signal of the output rod of the hydraulic cylinder in real time; the output flow of the pump is adjusted through the position information of the piston of the pump cavity, and the output displacement of the actuator is adjusted through the displacement signal of the output rod, so that double closed-loop control is formed.
In conclusion of the two movement processes, under the positive and negative signals of one period, the piston moves twice to finish oil suction and discharge twice, and the hydraulic cylinder moves twice.
Compared with the existing actuator structure, the invention has the following advantages:
(1) A voice coil motor is used as a drive, so that the response speed is improved;
(2) The position is fed back in real time by using a displacement sensor, so that the control precision is improved;
(3) The double-pump driving effect is achieved by adopting one piston, the structure is compact and simple, and the efficiency is high.
Drawings
FIG. 1 is a schematic view of an actuator.
Detailed Description
In order to make the construction principle and operation method of the present invention more intuitive and clear, the embodiments will be described with reference to the accompanying drawings, which are only some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without inventive efforts.
The embodiment of the invention provides a voice coil motor-driven double-cavity pump control actuator and a working method thereof.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
a voice coil motor driven dual chamber pump controlled actuator, as shown in fig. 1, comprising: the device comprises a piston 1, a pump cover plate 2, a pump head 3, a coil framework 4, a fastening nut 5, magnetic steel 6, an isolating ring 7, a coil 8, an iron core 9, a mandrel 10, a shell 11, a displacement sensor 12, a rear plug 13, an energy accumulator 14, a hydraulic cylinder 15, a first one-way control valve 17, a second one-way control valve 18, a third one-way control valve 16 and a fourth one-way control valve 19;
the bottom end of the piston 1 is fixedly connected with a coil framework 4 through a set nut 5, a coil 8 is wound on the outer side of the coil framework 4, the inner side of the coil framework is in clearance fit with a mandrel 10, the outer side of the coil 8 is in clearance fit with an inner hole of an isolating ring 7, the outer side of the isolating ring 7 is tightly attached to the inner side of a magnetic steel 6, the outer side of the magnetic steel 6 is tightly attached to an inner hole of a shell 11, the mandrel 10 is arranged in the inner hole of the shell 11 in an interference fit mode, a displacement sensor 12 is arranged in the inner hole of the mandrel 10 through threads, the upper end of an iron core 9 is in threaded connection with the piston 1, the lower end of the iron core is arranged in the inner hole of the displacement sensor 12, the shell 11 is connected with the pump head 3 through screws, and the pump cover plate 2 is arranged in the inner hole of the pump head 3 through threads;
a first pump cavity I is formed in an area between the piston 1 and the bottom surface of an inner hole of the pump head 3, a first oil outlet 3.2 and a first oil inlet 3.3 are formed in the first pump cavity I, the first oil outlet 3.2 is communicated with a high-pressure cavity 15.1 of the hydraulic cylinder 15 through a first one-way control valve 17, and the first oil inlet 3.3 is communicated with a low-pressure cavity 15.2 of the hydraulic cylinder 15 through a second one-way control valve 18;
a second pump cavity II is formed in the area between the piston 1 and the pump cover plate 2, a second oil outlet 3.1 and a second oil inlet 3.4 are formed in the second pump cavity II, the second oil outlet 3.1 is communicated with a high-pressure cavity 15.1 of the hydraulic cylinder 15 through a third one-way control valve 16, and the second oil outlet 3.4 is communicated with a low-pressure cavity 15.2 of the hydraulic cylinder 15 through a fourth one-way control valve 19;
the first one-way control valve 17 and the third one-way control valve 16 have the same function, the second one-way control valve 18 and the fourth one-way control valve 19 have the same function, and the two valves can be either passive one-way valves or active one-way valves or high-speed switching valves;
the first one-way control valve 17 only allows oil to flow from the first oil outlet 3.2 to the high-pressure chamber 15.1 and is cut off in the reverse direction, the second one-way control valve 18 allows oil to flow from the low-pressure chamber 15.2 to the first oil inlet 3.3 and is cut off in the reverse direction, the third one-way control valve 16 allows oil to flow from the second oil outlet 3.1 to the high-pressure chamber 15.1 and is cut off in the reverse direction, and the fourth one-way control valve 19 allows oil to flow from the low-pressure chamber 15.2 to the second oil inlet 3.4 and is cut off in the reverse direction;
the accumulator 14 is mounted on the oil circuit connecting the high pressure chamber 15.1 for a given system bias;
the inner ring of the magnetic steel 6 has N-pole polarity, and the outer ring has S-pole polarity;
the coil 8 is fed with a positive electric signal to generate a magnetic field with an N pole facing downwards and an S pole facing upwards, and a negative electric signal to generate a magnetic field with an S pole facing downwards and an N pole facing upwards;
the invention also discloses a working method of the voice coil motor-driven double-cavity actuator, which comprises the following steps:
when a positive value signal in a period is given by the coil 8, according to the ampere force rule, the coil 8 is subjected to an upward ampere force along the axial direction of the coil, the coil framework 4 drives the piston 1 to move upwards, the volume of the first pump cavity I is reduced, fluid is discharged through the first oil outlet 3.2 and the one-way control valve 17 and enters the high-pressure cavity 15.1, the hydraulic cylinder 15 moves rightwards, the volume of the second pump cavity II is increased, the fluid in the low-pressure cavity 15.2 is sucked in by the second pump cavity II through the one-way control valve 19 and the second oil inlet 3.4, the whole process finishes one-time actuation of the hydraulic cylinder 15, and the displacement sensor 12 feeds back position information in real time;
when a negative signal in a period is given by the coil 8, according to an ampere force rule, the coil 8 is subjected to an ampere force which is downward along the axial direction of the coil, the coil framework 4 drives the piston 1 to move downward, the volume of the second pump cavity II is reduced, fluid is discharged through the second oil outlet 3.1 and the one-way control valve 16 and enters the high-pressure cavity 15.1, the hydraulic cylinder 15 moves rightward, the volume of the first pump cavity I is increased, the fluid in the low-pressure cavity 15.2 is sucked in by the first pump cavity I through the one-way control valve 18 and the second oil inlet 3.3, the whole process finishes one-time actuation of the hydraulic cylinder 15, and the displacement sensor 12 feeds back position information in real time;
in conclusion of the two movement processes, under the positive and negative signals of one cycle, the piston 1 moves twice to finish the oil suction and discharge for 2 times, and the hydraulic cylinder 15 moves twice.
Compared with the existing actuator structure, the invention has the following advantages:
(1) A voice coil motor is used as a drive, so that the response speed is improved;
(2) The position is fed back in real time by using a displacement sensor, so that the control precision is improved;
(3) The double-pump driving effect is achieved by adopting one piston, the structure is compact and simple, and the efficiency is high.
The present invention has been described in detail with reference to the drawings or detailed description of the invention, and it is noted that some, but not all of the disclosed examples are shown in the drawings. Indeed, many different examples may be described and should not be construed as limited to only the examples set forth herein. Rather, these examples are described to further illustrate the positive effects of the present invention and are not exhaustive as is known or routine in the art.
Claims (8)
1. The utility model provides a voice coil motor drive two-chamber pump accuse actuator which characterized in that includes: the device comprises a piston (1), a pump cover plate (2), a pump head (3), a coil framework (4), a fastening nut (5), magnetic steel (6), a spacer ring (7), a coil (8), an iron core (9), a mandrel (10), a shell (11), a displacement sensor (12), a rear plug (13), an energy accumulator (14), a hydraulic cylinder (15), a first one-way control valve (17), a second one-way control valve (18), a third one-way control valve (16) and a fourth one-way control valve (19);
the bottom end of the piston (1) is fixedly connected with a coil framework (4) through a fastening nut (5), a coil (8) is wound on the outer side of the coil framework (4), the inner side of the coil framework is in clearance fit with a mandrel (10), the outer side of the coil (8) is in clearance fit with an inner hole of a spacer ring (7), the outer side of the spacer ring (7) is tightly attached to the inner side of a magnetic steel (6), the outer side of the magnetic steel (6) is tightly attached to an inner hole of a shell (11), the mandrel (10) is arranged in the inner hole of the shell (11) in an interference fit mode, a displacement sensor (12) is arranged in the inner hole of the mandrel (10) through threads, the upper end of an iron core (9) is in threaded connection with the piston (1), the lower end of the iron core is arranged in the inner hole of the displacement sensor (12), the shell (11) is connected with the pump head (3) through screws, and the pump cover plate (2) is arranged in the pump head (3) through threads;
a first pump cavity (I) is formed in an area between the piston (1) and the bottom surface of an inner hole of the pump head (3), a first oil outlet (3.2) and a first oil inlet (3.2) are formed in the first pump cavity (I), the first oil outlet (3.2) is communicated with a high-pressure cavity (15.1) of the hydraulic cylinder (15) through a first one-way control valve (17), and the first oil inlet (3.3) is communicated with a low-pressure cavity (15.2) of the hydraulic cylinder (15) through a second one-way control valve (18);
the area between the piston (1) and the pump cover plate (2) forms a second pump cavity (II), a second oil outlet (3.1) and a second oil inlet (3.4) are arranged in the second pump cavity (II), the second oil outlet (3.1) is communicated with a high-pressure cavity (15.1) of the hydraulic cylinder (15) through a third one-way control valve (16), and the second oil outlet (3.4) is communicated with a low-pressure cavity (15.2) of the hydraulic cylinder (15) through a fourth one-way control valve (19).
2. A voice coil motor driven dual chamber pump controlled actuator as claimed in claim 1 wherein the first one way control valve (17) and the third one way control valve (16) are functionally identical and the second one way control valve (18) and the fourth one way control valve (19) are functionally identical.
3. The voice coil motor-driven dual-chamber pump controlled actuator of claim 2, wherein the four one-way control valves are passive one-way valves, active one-way valves, or high-speed on-off valves.
4. The voice coil motor-driven dual-chamber pump control actuator as claimed in claim 3, wherein the first one-way control valve (17) allows oil to flow only from the first oil outlet (3.2) to the high pressure chamber (15.1) and to be blocked in the opposite direction, the second one-way control valve (18) allows oil to flow from the low pressure chamber (15.2) to the first oil inlet (3.3) and to be blocked in the opposite direction, the third one-way control valve (16) allows oil to flow from the second oil outlet (3.1) to the high pressure chamber (15.1) and to be blocked in the opposite direction, and the fourth one-way control valve (19) allows oil to flow from the low pressure chamber (15.2) to the second oil inlet (3.4) and to be blocked in the opposite direction.
5. A voice coil motor driven dual chamber pump actuator as claimed in claim 1 wherein the accumulator (14) is mounted on the oil circuit connecting the high pressure chambers (15.1) for a given system bias.
6. The voice coil motor-driven dual-chamber pump control actuator as claimed in claim 1, wherein the inner ring of the magnetic steel (6) has an N-pole polarity, and the outer ring has an S-pole polarity.
7. A voice coil motor driven dual chamber pump actuator as claimed in claim 1 wherein the coil (8) is energized with a positive electrical signal to produce a magnetic field with N pole down and S pole up, and with a negative electrical signal to produce a magnetic field with S pole down and N pole up.
8. A method of operating a voice coil motor driven dual chamber actuator as claimed in any one of claims 1 to 7, wherein the first pump chamber (i) and the second pump chamber (ii) are alternately pumped in parallel to effect two movements of the hydraulic cylinder (15) in a cycle, in particular as follows:
when a positive value signal in a period is given by the coil (8), according to the ampere force rule, the coil (8) is subjected to an upward ampere force along the axial direction of the coil, the coil framework (4) drives the piston (1) to move upwards, the volume of the first pump cavity (I) is reduced, fluid is discharged through the first oil outlet (3.2) and the one-way control valve (17) and enters the high-pressure cavity (15.1), the hydraulic cylinder (15) moves rightwards, the volume of the second pump cavity (II) is increased, the fluid in the low-pressure cavity (15.2) is sucked by the second pump cavity (II) through the one-way control valve (19) and the second oil inlet (3.4), the whole process finishes one-time actuation of the hydraulic cylinder (15), and the displacement sensor (12) feeds back position information in real time;
when a negative signal in a period is given by the coil (8), according to an ampere force rule, the coil (8) is subjected to an ampere force which is downward along the axial direction of the coil, the coil framework (4) drives the piston (1) to move downward, the volume of the second pump cavity (II) is reduced, fluid is discharged through the second oil outlet (3.1) and the one-way control valve (16) and enters the high-pressure cavity (15.1), the hydraulic cylinder (15) moves rightward, the volume of the first pump cavity (I) is increased, the fluid in the low-pressure cavity (15.2) is sucked by the first pump cavity (I) through the one-way control valve (18) and the second oil inlet (3.3), the whole process finishes one-time actuation of the hydraulic cylinder (15), and the displacement sensor (12) feeds back position information in real time;
under the positive and negative signals of one period, the piston (1) moves twice to finish oil suction and discharge twice, and the hydraulic cylinder (15) moves twice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211741944.5A CN115978025A (en) | 2022-12-30 | 2022-12-30 | Voice coil motor-driven double-cavity pump control actuator and working method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211741944.5A CN115978025A (en) | 2022-12-30 | 2022-12-30 | Voice coil motor-driven double-cavity pump control actuator and working method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115978025A true CN115978025A (en) | 2023-04-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211741944.5A Pending CN115978025A (en) | 2022-12-30 | 2022-12-30 | Voice coil motor-driven double-cavity pump control actuator and working method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115978025A (en) |
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2022
- 2022-12-30 CN CN202211741944.5A patent/CN115978025A/en active Pending
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