CN105570226A - Digital voice coil motor control servo valve - Google Patents
Digital voice coil motor control servo valve Download PDFInfo
- Publication number
- CN105570226A CN105570226A CN201610145501.8A CN201610145501A CN105570226A CN 105570226 A CN105570226 A CN 105570226A CN 201610145501 A CN201610145501 A CN 201610145501A CN 105570226 A CN105570226 A CN 105570226A
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- CN
- China
- Prior art keywords
- voice coil
- coil motor
- digital
- valve
- servovalve
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- 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.)
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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
- 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
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- 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
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K31/00—Actuating devices; Operating means; Releasing devices
- F16K31/02—Actuating devices; Operating means; Releasing devices electric; magnetic
- F16K31/04—Actuating devices; Operating means; Releasing devices electric; magnetic using a motor
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Servomotors (AREA)
- Magnetically Actuated Valves (AREA)
Abstract
The invention discloses a digital voice coil motor control servo valve. The digital voice coil motor control servo valve comprises a voice coil motor, a four-way servo valve, a hall position sensor and a digital servo controller; the digital servo controller is mounted on the voice coil motor and the hall position sensor, and is respectively connected with the voice coil motor and the hall position sensor through cables; the voice coil motor directly drives the four-way servo valve, and includes a magnetic conducting pressure resistant shell, a movable ring component and an inner magnet; the hall position sensor includes a position feedback rod, an induction coil, a sensor pressure resistant pipe and a shell support frame; the four-way servo valve includes a valve body, a valve element, a valve sleeve and an end cover plate; the valve element is rigidly connected with the movable ring component and the position feedback rod; and the valve body is fixed with the magnetic conducting pressure resistant shell of the voice coil motor. The digital voice coil motor control servo valve can synchronously satisfy the performance characteristics of a proportional valve and a servo valve on performance, is strong in oil pollution resistance on structure, and can perform closed-loop control in a hydraulic loop, or can perform open-loop control.
Description
Technical field
The present invention relates to servovalve, specifically a kind of digital voice coil motor controls servovalve.
Background technique
Proportional control valve and servovalve are commonly referred to as electrical modulation hydraulic control valve.In electrical modulation hydraulic control valve, proportional control valve is applied to oil hydraulic circuit, and continuous regulating action under a main opened loop control, also can realize closed loop control application, but its dynamic response when closed loop control regulates is not high enough; And although servovalve dynamic response is high, it can only be applied to close loop control circuit and can not be used in opened loop control loop, and in addition, this body structure of servovalve oil resistant liquid pollution capacity is poor, and using in general industry Hydraulic Field has certain limitation.
Summary of the invention
For solving the problems of the technologies described above, the invention provides a kind of digital voice coil motor and control servovalve, function can meet Proportional valve and servovalve behavior characteristics simultaneously, dynamic response reaches servovalve level and can apply in opened loop control loop, its structure oil resistant liquid pollution capacity is strong, and both can closed loop control also can opened loop control in oil hydraulic circuit.
The present invention takes following technological scheme: digital voice coil motor controls servovalve, comprise voice coil motor, four-way servovalve, hall position sensor and digital servocontroller, described digital servocontroller is arranged on voice coil motor and hall position sensor, described voice coil motor Direct driver four-way servovalve; Described voice coil motor comprises magnetic conduction pressure casing and is positioned at moving coil component and the internal magnet of magnetic conduction pressure casing, described hall position sensor comprises inductor coil, position feedback bar, sensor pressure pipe and shell supporting frame, inductor coil is provided with in described shell supporting frame, described inductor coil one end is fixed with sensor pressure pipe, one end of described sensor pressure pipe is fixed on magnetic conduction pressure casing, and described position feedback bar is threaded with moving coil component; Described four-way servovalve comprises valve body, be positioned at the zero lap four of valve body controls the spool of limit function and valve pocket and is arranged on the end casing of valve body sidepiece, one end of described spool is provided with spring seat and Returnning spring, the other end of spool and moving coil component and position feedback bar are rigidly connected, valve core movement is regulated by voice coil motor, the magnetic conduction pressure casing of described valve body and voice coil motor is fixed, described valve body lower portion is provided with oil return inlet T, pressure oil port P, oil inlet and outlet A and oil inlet and outlet B, and is communicated with the active chamber of spool by valve inner oil duct.Oil duct in valve body communicates with 4 throttling windows of valve pocket respectively, at work, is precisely moved by the front and back of spool, realizes oil circuit P-A, B-T, and continuous, accurate, the high frequency of anti-phase P-B, A-T control.
Described digital servocontroller comprises servocontroller and protecting sheathing; the side of described protecting sheathing is provided with communication port; opposite side is provided with seven core plugs; described protecting sheathing is arranged on magnetic conduction pressure casing and shell supporting frame, and described digital servocontroller is connected with voice coil motor and hall position sensor respectively by cable.
The end casing of described valve body sidepiece is also provided with exhaust bolt.Can facilitate in chamber and be vented, avoid loop residual gas to be gathered in valve pocket dead band and interference effect is produced to valve work.
Magnetic isolation board is provided with between the magnetic conduction pressure casing of described valve body and voice coil motor.
Described magnetic conduction pressure casing is provided with the withstand voltage voice coil motor socket of oil resistant, and described digital servocontroller is connected by the voice coil motor socket that cable and oil resistant are withstand voltage.
This servovalve adopts voice coil motor, form electric closed-loop feedback by hall position sensor to control, four throttlings of servovalve control mouth and will ensure zero lap, first ensure that the error of mechanical zero is very little, then by regulating the electrical null position of Hall transducer to revise.In work, according to the consecutive variations of input signal size, digital servo controller and Hall transducer form automated closed-loop and regulate, and come accurately, the thrust size of high speed control voice coil motor, thus reach the automatic oil circuit commutation of servovalve and changes in flow rate continuous, precisely regulate.
Advantage of the present invention is: 1, because voice coil motor has high dynamic characteristic and response acceleration, there is larger thrust, valve core movement can be overcome and produce the used momentum of various frictional force, hydraulic power, spring force and interference, meet the senior control performance of servovalve.2, this valve is compared with the servovalve of nozzle-flapper structure, there is stronger antijamming capability, compared with high frequency sound proportional control valve, there is very high Dynamic response, very large electric proportion adjustment thrust, can precision control valve core displacement amount, and spool travel change reaches 0.01mm resolution, adjusting function is also higher than high frequency sound proportional control valve, and has very high wear resistance and working life.3, adopt digital servocontroller, regulated by Digital Control, meet industrial automation interface needs, easy to adjust.4, the valve pocket window structure principle of this valve adoption rate directional throttle valve, has Control function various informative, the feature that oil resistant pollution capacity is strong.5, this valve is not when forming electric feedback closed loop, and common exactly electricity drives selector valve working principle, if control malfunctioning, is conducive to loop application.6, this valve not only can regulate flow continuous closed-loop in servo-system, also can with the position feedback of outside or pressure feedback or angle feed-back, realize the position of executive component or the closed loop control of pressure or angle.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is the partial enlarged drawing at I place in Fig. 1;
Fig. 3 is the partial enlarged drawing at II place in Fig. 1;
Fig. 4 is the worm's eye view of Fig. 1;
In figure, 1, hall position sensor, 2, shell supporting frame, 3, servocontroller, 4, communication port, 5, seven core plugs, 6, voice coil motor socket, 7, valve pocket, 8, spool, 9, valve body, 10, first spring seat, 11, Returnning spring, 12, one O shape circle, 13, exhaust bolt, 14, end casing, 15, second spring seat, 16, 2nd O shape circle, 17, the spacing pad of spool, 18, magnetic isolation board, 19, 3rd O shape circle, 20, moving coil component, 21, position feedback bar, 22, magnetic conduction pressure casing, 23, internal magnet, 24, sensor pressure pipe, 25, 4th O shape circle, 26, oil return inlet T, 27, pressure oil port P, 28, oil inlet and outlet A, 29, oil inlet and outlet B, 30, inductor coil, 31, protecting sheathing.
Embodiment
Below in conjunction with the drawings and specific embodiments, technological scheme of the present invention is further described, but the protection domain of invention is not limited thereto.
As shown in Figures 1 to 4, digital voice coil motor controls servovalve, comprises voice coil motor, four-way servovalve, hall position sensor 1 and digital servocontroller, voice coil motor Direct driver four-way servovalve.Voice coil motor comprises magnetic conduction pressure casing 22 and is positioned at moving coil component 20 and the internal magnet 23 of magnetic conduction pressure casing 22, magnetic conduction pressure casing 22 is provided with the withstand voltage voice coil motor socket 6 of oil resistant, digital servocontroller is connected by the voice coil motor socket 6 that cable and oil resistant are withstand voltage, be provided with magnetic isolation board 18 between the magnetic conduction pressure casing 22 of four-way servovalve and voice coil motor, between magnetic conduction pressure casing 22 and magnetic isolation board, be provided with the 3rd O shape circle 19.Owing to being that high dynamic performance and high acceleration and rating value reach 80N, the thrust of peak value 150N, make voice coil motor when overcome friction, spring force, hydraulic power, used momentum, be 87HZ when can reach spool 90% aperture, 10% aperture is 260HZ (-3 decibels of point).
Hall position sensor 1 comprises inductor coil 30, position feedback bar 21, sensor pressure pipe 24 and shell supporting frame 2, inductor coil 30 is provided with in shell supporting frame 2, one end of inductor coil 30 is fixed with sensor pressure pipe 24, one end of sensor pressure pipe 24 is fixed on magnetic conduction pressure casing 22, therebetween the 4th O shape circle 25 is provided with, digital servocontroller is connected with hall position sensor 1 by cable, position feedback bar 21 is threaded with moving coil component 20, and moving coil component 20 is also threaded with spool 8.Position feedback bar 21 is contactless, therefore can reach very high working life.
Four-way servovalve comprises valve body 9, be positioned at the zero lap four of valve body 9 controls the spool 8 of limit function and valve pocket 7 and is arranged on the end casing 14 of valve body 9 sidepiece, end casing 14 is provided with exhaust bolt 13, can facilitate in chamber and be vented, avoid loop residual gas to be gathered in valve pocket dead band and interference effect is produced to valve work.Also be provided with an O shape between valve body 9 and end casing 14 and enclose 12, one end of spool 8 is provided with the first spring seat 10 and the second spring seat 15 and Returnning spring 11, second spring seat 15 is positioned on end casing 14, the other end of spool 8 and the feedback rod 21 of moving coil component 20 and sensor are rigidly connected, valve core movement is regulated by voice coil motor, and position transducer 1 can machinery and the electric zero-bit regulating servo spool 8.Valve body 9 is bolted with the magnetic conduction pressure casing 22 of voice coil motor, is also provided with magnetic isolation board 18 therebetween, is provided with the spacing pad 17 of spool between spool 8 and magnetic isolation board 18.Valve body 9 bottom is provided with oil return inlet T, pressure oil port P, oil inlet and outlet A and oil inlet and outlet B, and is communicated with each active chamber of spool 8 by valve inner oil duct, and oil inlet and outlet A and oil inlet and outlet B place are provided with the 2nd O shape circle 16.This servovalve four limit valve port zero lap structures, have the performance that servovalve is identical, can the various Median Function of extension valve, have various proportional servo valve performance, namely can closed loop control also can opened loop control in oil hydraulic circuit.Spool 8 leads with valve pocket 7 precision, and frictional force is minimum, and has very high wear resistance.
Digital servocontroller comprises protecting sheathing 31 and is positioned at the servocontroller 3 of protecting sheathing 31, and the side of protecting sheathing is provided with RS232 communication port 4, and opposite side is provided with seven core plugs 5, protecting sheathing is arranged on magnetic conduction pressure casing 22 and on shell supporting frame 2.Digital servocontroller is by Microprocessor S3C44B0X, and kernel is the digital control of DSP calculation function, by software programming, has digital regulated function, versatility good reliability, meets industrial automation interface needs, easy to adjust.
Principle of the present invention: servocontroller 3 is moved by the moving coil component 20 of SC sigmal control voice coil motor, moving coil component 20 and position feedback bar 21, spool 8 are rigidly connected, when voice coil motor works, the spool 8 be connected with moving coil component 20 offsets certain displacement amount, and form certain four margin knot head pieces between valve pocket 7 to change, the displacement amount of the spool 8 detected is produced electrical signal by Hall effect and feeds back in servocontroller 3 by position feedback bar 21, forms position-force control principle.When not having signal to input, spool 8 remains on Bias Safe position under the effect of Returnning spring 11; When there being signal to input, the moving coil component 20 of the voice coil motor of band hall position sensor 1, Direct driver spool 8, forms zero lap four and controls limit function in valve pocket 7.The size of throttle orifice, regulates the changes in flow rate of oil inlet and outlet A and oil inlet and outlet B, flow is entered by main valve body pressure oil port P, flows out from main valve body oil return inlet T.Spool 8 aperture position departure produces feedback deviation signal by the position feedback bar 21 of sensor and compares with input signal values, until input signal values is equal with actual value, spool 8 is made to be in stress balance, to keep the aperture position accuracy value formed between spool 8 and valve pocket 7, like this, proportional change regulates with input signal values under closed loop control condition for spool 8 travel position and the change of control valve port.
What form between spool 8 and valve pocket 7 is four-side mouth, each control valve port all has very little covering amount or zero lap amount, after the voice coil motor live line work of hall position sensor, promote servo spool 8 and produce certain opening amount, Throttle Principle controls output flow in proportion, when voice coil motor positively charged, servo spool 8 is stressed to be moved to the left, the power produced with Returnning spring 11 balances each other, position transducer makes displacement amount and input signal values composition relation, at this moment, the throttling window of fluid by being formed between spool 8 and valve pocket 7, respectively from pressure oil port P to oil inlet and outlet A, oil inlet and outlet B is to oil return inlet T.When voice coil motor is electronegative, spool 8 is stressed to be moved to the right, certain thrust that Returnning spring 11 also produces, hall position sensor 1 makes displacement amount and input signal values composition relation, at this moment, fluid by the throttling window that formed between spool 8 and valve pocket 7, respectively from pressure oil port P to oil inlet and outlet B, oil inlet and outlet A is to oil return inlet T.
When voice coil motor power-off, spool 8 is pushed to biased right-hand member position for spring 11 again, and each hydraulic fluid port can be kept to be in the home closed or be communicated with.During voice coil motor work, whole magnetic conduction pressure casing 22 is communicated with sensor pressure pipe 24, infiltrates in fluid all the time, and has compression resistance to 10MPa ability.Voice coil motor socket 6 is arranged on magnetic conduction pressure casing 22, and this socket is made up of contact pin, sintered glass, metal shell, itself has compression resistance to 10MPa ability, and in certainly using, voice coil motor part is full of at most the hydraulic oil of 1MPa.
Digital voice coil motor of the present invention controls servovalve, during work, by integrated digital servocontroller, controls voice coil motor and directly drives, by the position transducer of Hall effect by the position feedback of spool to servocontroller, the closed loop control of formation high frequency.This servovalve can be used alone in addition, also can regard pilot valve, external position feedback or pressure feedback, realize 2 grades of servocontrol.
Claims (5)
1. digital voice coil motor controls servovalve, it is characterized in that: comprise voice coil motor, four-way servovalve, hall position sensor and digital servocontroller, described digital servocontroller is arranged on voice coil motor and hall position sensor, described voice coil motor Direct driver four-way servovalve
Described voice coil motor comprises magnetic conduction pressure casing and is positioned at moving coil component and the internal magnet of magnetic conduction pressure casing, described hall position sensor comprises inductor coil, position feedback bar, sensor pressure pipe and shell supporting frame, inductor coil is provided with in described shell supporting frame, described inductor coil one end is fixed with sensor pressure pipe, one end of described sensor pressure pipe is fixed on magnetic conduction pressure casing, described position feedback bar is threaded with moving coil component
Described four-way servovalve comprises valve body, be positioned at the zero lap four of valve body controls the spool of limit function and valve pocket and is arranged on the end casing of valve body sidepiece, one end of described spool is provided with spring seat and Returnning spring, the other end of spool and moving coil component and position feedback bar are rigidly connected, valve core movement is regulated by voice coil motor, the magnetic conduction pressure casing of described valve body and voice coil motor is fixed, described valve body lower portion is provided with oil return inlet T, pressure oil port P, oil inlet and outlet A and oil inlet and outlet B, and is communicated with the active chamber of spool by valve inner oil duct.
2. digital voice coil motor according to claim 1 controls servovalve; it is characterized in that: described digital servocontroller comprises servocontroller and protecting sheathing; the side of described protecting sheathing is provided with communication port; opposite side is provided with seven core plugs; described protecting sheathing is arranged on magnetic conduction pressure casing and shell supporting frame, and described digital servocontroller is connected with voice coil motor and hall position sensor respectively by cable.
3. digital voice coil motor according to claim 1 controls servovalve, it is characterized in that: the end casing of described valve body sidepiece is provided with exhaust bolt.
4. digital voice coil motor according to claim 1 controls servovalve, it is characterized in that: be provided with magnetic isolation board between the magnetic conduction pressure casing of described valve body and voice coil motor.
5. digital voice coil motor according to claim 1 controls servovalve, and it is characterized in that: described magnetic conduction pressure casing is provided with voice coil motor socket, described digital servocontroller is connected with voice coil motor socket by cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610145501.8A CN105570226B (en) | 2016-03-15 | 2016-03-15 | Digital voice coil motor controls servo valve |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610145501.8A CN105570226B (en) | 2016-03-15 | 2016-03-15 | Digital voice coil motor controls servo valve |
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| CN105570226A true CN105570226A (en) | 2016-05-11 |
| CN105570226B CN105570226B (en) | 2017-12-05 |
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| CN201610145501.8A Active CN105570226B (en) | 2016-03-15 | 2016-03-15 | Digital voice coil motor controls servo valve |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327591A (en) * | 2017-08-02 | 2017-11-07 | 油威力液压科技股份有限公司 | High voltage-resistant bi-directional proportion electro-magnet drives double-spring structure proportional servo valve |
| CN108757995A (en) * | 2018-07-24 | 2018-11-06 | 凯铭科技(杭州)有限公司 | A kind of multichannel flow control valve |
| CN113483138A (en) * | 2021-06-16 | 2021-10-08 | 北京华德液压工业集团有限责任公司 | Digital valve with shaft motion controller |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107327591A (en) * | 2017-08-02 | 2017-11-07 | 油威力液压科技股份有限公司 | High voltage-resistant bi-directional proportion electro-magnet drives double-spring structure proportional servo valve |
| CN107327591B (en) * | 2017-08-02 | 2023-08-18 | 油威力液压科技股份有限公司 | High-pressure-resistant proportional servo valve with bidirectional proportional electromagnet driven double-spring structure |
| CN108757995A (en) * | 2018-07-24 | 2018-11-06 | 凯铭科技(杭州)有限公司 | A kind of multichannel flow control valve |
| CN113483138A (en) * | 2021-06-16 | 2021-10-08 | 北京华德液压工业集团有限责任公司 | Digital valve with shaft motion controller |
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|---|---|
| CN105570226B (en) | 2017-12-05 |
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Address after: 226100 Jiangsu city of Nantong Province Haimen Haimen Town Road No. 749 Patentee after: Oil power hydraulic Polytron Technologies Inc Address before: 226100 Jiangsu city of Nantong Province Haimen Haimen Town Road No. 749 Patentee before: Haimen Youweili Hydraulic Co., Ltd. |