CN102305307B - Linear servo device of hydraulic valve and operating method thereof - Google Patents
Linear servo device of hydraulic valve and operating method thereof Download PDFInfo
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- CN102305307B CN102305307B CN 201110227007 CN201110227007A CN102305307B CN 102305307 B CN102305307 B CN 102305307B CN 201110227007 CN201110227007 CN 201110227007 CN 201110227007 A CN201110227007 A CN 201110227007A CN 102305307 B CN102305307 B CN 102305307B
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- 238000011017 operating method Methods 0.000 title abstract 2
- 238000006073 displacement reaction Methods 0.000 claims abstract description 10
- 230000000694 effects Effects 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 9
- 238000001514 detection method Methods 0.000 claims description 3
- 230000002708 enhancing effect Effects 0.000 claims description 3
- 230000033001 locomotion Effects 0.000 abstract description 10
- 238000005192 partition Methods 0.000 abstract 1
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 3
- 230000005611 electricity Effects 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- -1 copper between first Chemical compound 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000000314 lubricant Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000696 magnetic material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
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Abstract
The invention belongs to a linear servo device of a hydraulic valve and an operating method thereof. The device comprises a pair of cylinders which are alternately arranged, a first magnet exciting coil and a second magnet exciting coil which are respectively sheathed on the cylinders, a first armature and a second armature which are respectively arranged in the cylinders, and a magnet partition body used for connecting the first armature and the second armature, wherein, the outside end of the first armature is in rigid connection with the valve core of the hydraulic valve; the power supply ends of the first magnet exciting coil and the second magnet exciting coil are respectively connected with a first PWM (pulse-width modulation) pulse direct current (DC) power supply and a second PWM pulse DC power supply; and the first PWM pulse DC power supply and the second PWM pulse DC power supply are connected with an intelligent controller, and the intelligent controller is suitable for controlling average voltage ratio of PWM pulse output by the first PWM pulse DC power supply and the second PWM pulse DC power supply so as to control displacement of the valve core and further control the opening size of the hydraulic valve. The linear servo device provided by the invention has the advantages that the armature cores controlled by the double coils replace a DC proportional electromagnet controlled by a single coil so as to accurately and gradually control the opening size, thus preventing great change of motion sate of the controlled object.
Description
Technical field
The present invention relates to a kind of linear servo device and method of work thereof of hydrovalve.
Background technique
Control unit in the hydrovalve Hydraulic Power Transmission System is the common components in the industrial production control, is used for controlling direction, pressure and the flow of liquid.It is made up of valve body, spool and liquid flow path etc.That the control of its spool can be adopted is manual, motor-driven, surge, electronic, electricity surges etc., and electronic control is owing to interrelate with control circuit, easily is automated and is widely used.But common solenoid valve is inhaled the moving armature core after adopting coil electricity, drive spool by iron core again and produce motion, again after dead electricity by spring reset armature core and spool, thereby the break-make of control liquid stream.Therefore this controlling method, is controlled the violent change that object can experience motion state usually because the core of the armature in an instant motion impact of energising is bigger, is unfavorable for the accurate control of controlled object state.Especially in the control of Proportional valve, adopt the unicoil of direct current proportion electro-magnet to control the suction size of armature and the balance method of spring force, thereby the control openings of sizes reaches the size of proportional control speed, pressure, flow, be subjected to especially that spring force changes, control accuracy is low, limited the application of Proportional valve.
The principle of existing coil control armature core motion is illustrated in fig. 1 shown below.When field coil D switches on, the magnetic conduction cylinder B and the magnetic guiding loop C that are made by soft magnetic material will be electromagnet by the magnetic field magnetisation of coil D, and armature C is produced suction, and when the position 1 by Fig. 1 (a) is drawn onto the position 2 of Fig. 1 (b), armature C will no longer move.This movement velocity is uncontrolled, and armature C is very short by the time that position 1 arrives equilibrium position 2, and control accuracy is low.
Summary of the invention
Technical problem to be solved by this invention provides a kind of linear servo device and method of work thereof of simple in structure, hydrovalve that control accuracy is higher.
For solving the problems of the technologies described above, the linear servo device of hydrovalve of the present invention, comprise: first, second cylindrical shell of alternate setting, be sheathed on first, second field coil on first, second cylindrical shell respectively, be located at first, second armature in described first, second cylindrical shell respectively, be used for connecting first, second armature every magnet; The outboard end of first armature and the spool of described hydrovalve are rigidly connected; The power end of first, second field coil links to each other with first, second pwm pulse DC electrical source respectively; First, second pwm pulse DC electrical source and one be suitable for controlling this first, second pwm pulse DC electrical source output pwm pulse average voltage than and the intelligent controller controlling the displacement of described spool and then control the openings of sizes of described hydrovalve links to each other.
Further, for strengthening the Electromagnetic Control effect, described first, second cylindrical shell is magnetic conductive cylinder, and the two end part of first, second cylindrical shell are connected with first, second magnetic guiding loop respectively.
Further, for guaranteeing to control effect, the coaxial setting of described first, second cylindrical shell; Described every the cylindrical body of magnet for described first, second armature that is used for being rigidly connected.During concrete enforcement, be provided with lubricant oil in the cylindrical shell.
The pipeline at described hydrovalve place be provided with link to each other with described intelligent controller, for detection of the flow transducer of the openings of sizes of described hydrovalve.The openings of sizes of the described hydrovalve of this moment is suitable for calculating by hydraulic pressure value and specific discharge.
The method of work of the linear servo device of described hydrovalve, it comprises:
Hydrovalve is under the effect of its Returnning spring, and its initial position is closed state;
When needs are opened this hydrovalve to default openings of sizes, intelligent controller is control first earlier, the second pwm pulse DC electrical source is exported respectively by zero and is begun first of enhancing gradually, second pwm pulse, simultaneously change first gradually, the average voltage ratio of second pwm pulse, so that described first, magnetic force on second armature is unbalance and overcome the active force of the Returnning spring in this hydrovalve, and make the spool in this hydrovalve that slowly displacement take place, slowly to open this hydrovalve, when the opening of this hydrovalve reaches default size, keep current described first, the second pwm pulse average voltage ratio, this moment, described spool was described first, be in the equilibrium position under the effect of second armature, the openings of sizes of described hydrovalve is remained unchanged;
When needs are adjusted the openings of sizes of this hydrovalve, intelligent controller is adjusted described first, second pwm pulse average voltage ratio gradually, the described spool of this moment is slowly adjusted the equilibrium position under the effect of described first, second armature, when the opening of described hydrovalve reaches required size, stop to change the average voltage ratio of described first, second pwm pulse, the spool of this moment stops at second equilibrium position;
When needs are closed this hydrovalve, intelligent controller is corresponding adjusts described first, second pwm pulse average voltage ratio gradually, so that described spool under the effect of described first, second armature slowly to the operating position displacement, when described hydraulic valve closes, stop to export described first, second pwm pulse.
Described intelligent controller detects the openings of sizes of described hydrovalve by described flow transducer, to adjust the average voltage ratio of first, second pwm pulse gradually, in real time, makes the openings of sizes of described hydrovalve remain on default size.
Compared with prior art, the present invention has the following advantages: it is original that (1) the present invention adopts twin coil control armature core to replace--the direct current proportion electro-magnet of mechanical structure, can accurately, little by little control the size of opening, avoid being occurred by the control object situation of the violent change of motion state.Specifically: adopt an intelligent controller to adjust the pwm pulse average voltage ratio of first, second pwm pulse DC electrical source output gradually, to control the openings of sizes of described hydrovalve.
Description of drawings
The structural representation of the linear servo device of the hydrovalve of Fig. 1 (a) and Fig. 1 (b) unicoil control of the prior art armature core motion;
Fig. 2 is the structural representation of the linear servo device of the hydrovalve among the embodiment;
Fig. 3 is in the schematic representation of another location for the armature in the linear servo device among Fig. 2;
Fig. 4 is the structural representation of described linear servo device control spool.
Embodiment
The invention will be further described below in conjunction with accompanying drawing.
As Fig. 2-4, the linear servo device of the hydrovalve of present embodiment comprises: first, second cylindrical shell 2,12 of alternate setting, be sheathed on first, second field coil 4,14 on first, second cylindrical shell 2,12 respectively, be located at described first, second cylindrical shell 2, first, second armature 3,13 in 12 respectively, be used for connecting first, second armature 3,13 every magnet 5; The spool 7 of the outboard end of first armature 3 and described hydrovalve 6 is rigidly connected; First, second field coil 4,14 power end link to each other with first, second pwm pulse DC electrical source respectively; First, second pwm pulse DC electrical source and one be suitable for controlling this first, second pwm pulse DC electrical source output pwm pulse average voltage than and the intelligent controller controlling the displacement of described spool and then control the openings of sizes of described hydrovalve links to each other.
Wherein, circuit structure and the principle of intelligent controller and first, second pwm pulse DC electrical source can be referring to " the monolithic processor controlled μ s of PIC level pwm pulse Research of Power ", document sources: " electric machining and mould ", 03 phase in 2011.
Described first, second cylindrical shell 2,12 is magnetic conductive cylinder, and first, second cylindrical shell 2,12 two end part are connected with first, second magnetic guiding loop 1,11 respectively.
Described first, second cylindrical shell 2,12 coaxial settings; Describedly be described first, second armature 3 that is used for being rigidly connected, 13 cylindrical body every magnet 5.
The pipeline at described hydrovalve 6 places be provided with link to each other with described intelligent controller, for detection of the flow transducer of the openings of sizes of described hydrovalve.
As Fig. 2, use every magnet 5(such as copper between first, second armature 3,13) be rigidly connected, under two field coils situation identical with armature, when the pulsed voltage U1 that exports respectively when first, second pwm pulse DC electrical source uses the identical pwm pulse of width to drive first, second field coil respectively with U2 simultaneously, the average voltage of pulsed voltage U1 and U2 equates that the magnetic field suction that produces also equates; But because second armature 13 is balance in the illustrated case, do not have axial force to produce, and first armature 3 does not arrive the equilibrium position, is subjected to the effect of axial force to the right, can drive second armature 13 and move right.But along with moving right of second armature 13, also be in non-equilibrium site, be subjected to the effect of axial force left, first, second armature 3,13 stop motions reach equilibrium position shown in Figure 3 behind two power equal and opposite in directions.
If the pwm pulse average voltage of the first pulsed voltage U1 is less than the second pulsed voltage U2, the equilibrium position will be moved to the direction of first armature 3 of little average voltage so.Obviously, the pwm pulse average voltage of pulsed voltage U1 and U2 affects the equilibrium position of each armature, the corresponding equilibrium position of each average voltage, therefore, as long as the pwm pulse average voltage ratio of pulsed voltage U1 and U2 gradually changes, the equilibrium position is just slowly mobile controllably gradually, reaches the purpose of accurate control.
(embodiment 2)
The method of work of the linear servo device of described hydrovalve comprises:
When needs are opened this hydrovalve 6 to default openings of sizes, intelligent controller is control first earlier, the second pwm pulse DC electrical source is exported respectively by zero and is begun first of enhancing gradually, second pwm pulse, simultaneously change first gradually, the average voltage ratio of second pwm pulse, so that described first, second armature 3, magnetic force on 13 is unbalance and overcome the active force of the Returnning spring 8 in this hydrovalve 8, and make the spool 7 in this hydrovalve 8 that slowly displacement take place, slowly to open this hydrovalve 8, when the opening of this hydrovalve 8 reaches default size, keep current described first, the second pwm pulse average voltage ratio, this moment, described spool was described first, second armature 3, be in the equilibrium position under 13 the effect, the openings of sizes of described hydrovalve 6 is remained unchanged;
When needs are adjusted the openings of sizes of this hydrovalve 6, intelligent controller is adjusted described first, second pwm pulse average voltage ratio gradually, the described spool 7 of this moment is slowly adjusted the equilibrium position under described first, second armature 3,13 effect, when the opening of described hydrovalve 6 reaches required size, stop to change the average voltage ratio of described first, second pwm pulse, the spool 7 of this moment stops at second equilibrium position;
When needs are closed this hydrovalve 6, intelligent controller is corresponding adjusts described first, second pwm pulse average voltage ratio gradually, so that described spool 7 under the effect of described first, second armature slowly to the operating position displacement, when described hydrovalve 6 cuts out, stop to export described first, second pwm pulse.
Described intelligent controller detects the openings of sizes of described hydrovalve 6 by described flow transducer, to adjust the average voltage ratio of first, second pwm pulse gradually, in real time, makes the openings of sizes of described hydrovalve 6 remain on default size.
The above embodiment of the present invention only is explanation example of the present invention, and embodiment of the present invention is not limited thereto.Replace for being equivalence belong to the modification done under spirit of the present invention and the principle, combination, simplification, substitute etc., all still be included within protection scope of the present invention.
Claims (5)
1. the linear servo device of a hydrovalve, it is characterized in that comprising: first, second cylindrical shell of alternate setting, be sheathed on first, second field coil on first, second cylindrical shell respectively, be located at first, second armature in described first, second cylindrical shell respectively, be used for connecting first, second armature every magnet;
The outboard end of first armature and the spool of described hydrovalve are rigidly connected;
The power end of first, second field coil links to each other with first, second pwm pulse DC electrical source respectively;
First, second pwm pulse DC electrical source and one be suitable for controlling this first, second pwm pulse DC electrical source output pwm pulse average voltage than and the intelligent controller controlling the displacement of described spool and then control the openings of sizes of described hydrovalve links to each other.
2. the linear servo device of hydrovalve according to claim 1, it is characterized in that: described first, second cylindrical shell is magnetic conductive cylinder, and the two end part of first, second cylindrical shell are connected with first, second magnetic guiding loop respectively.
3. the linear servo device of hydrovalve according to claim 1 is characterized in that: the coaxial setting of described first, second cylindrical shell; Described every the cylindrical body of magnet for described first, second armature that is used for being rigidly connected.
4. the linear servo device of hydrovalve according to claim 1 is characterized in that: the pipeline at described hydrovalve place be provided with link to each other with described intelligent controller, for detection of the flow transducer of the openings of sizes of described hydrovalve.
5. the method for work of the linear servo device of the described hydrovalve of one of described claim 1-4 is characterized in that:
Hydrovalve is under the effect of its Returnning spring, and its initial position is closed state;
When needs are opened this hydrovalve to default openings of sizes, intelligent controller is control first earlier, the second pwm pulse DC electrical source is exported respectively by zero and is begun first of enhancing gradually, second pwm pulse, simultaneously change first gradually, the average voltage ratio of second pwm pulse, so that described first, magnetic force on second armature is unbalance and overcome the active force of the Returnning spring in this hydrovalve, and make the spool in this hydrovalve that slowly displacement take place, slowly to open this hydrovalve, when the opening of this hydrovalve reaches default size, keep current described first, the second pwm pulse average voltage ratio, this moment, described spool was described first, be in the equilibrium position under the effect of second armature, the openings of sizes of described hydrovalve is remained unchanged;
When needs are adjusted the openings of sizes of this hydrovalve, intelligent controller is adjusted described first, second pwm pulse average voltage ratio gradually, the described spool of this moment is slowly adjusted the equilibrium position under the effect of described first, second armature, when the opening of described hydrovalve reaches required size, stop to change the average voltage ratio of described first, second pwm pulse, the spool of this moment stops at second equilibrium position;
When needs are closed this hydrovalve, intelligent controller is corresponding adjusts described first, second pwm pulse average voltage ratio gradually, so that described spool under the effect of described first, second armature slowly to the operating position displacement, when described hydraulic valve closes, stop to export described first, second pwm pulse.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110227007 CN102305307B (en) | 2011-08-09 | 2011-08-09 | Linear servo device of hydraulic valve and operating method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110227007 CN102305307B (en) | 2011-08-09 | 2011-08-09 | Linear servo device of hydraulic valve and operating method thereof |
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| CN102305307A CN102305307A (en) | 2012-01-04 |
| CN102305307B true CN102305307B (en) | 2013-07-10 |
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| CN 201110227007 Expired - Fee Related CN102305307B (en) | 2011-08-09 | 2011-08-09 | Linear servo device of hydraulic valve and operating method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103674073A (en) * | 2012-08-31 | 2014-03-26 | 鼎佳（天津）汽车电子有限公司 | Three-pole-piece sensor |
| CN104879551A (en) * | 2015-05-22 | 2015-09-02 | 南京航空航天大学 | Pneumatic proportional valve system based on switch strategy and control method thereof |
| CN105064807A (en) * | 2015-08-06 | 2015-11-18 | 苏州好压净化设备有限公司 | Multi-coil magnetic levitation electromagnetic motion mechanism and magnetic levitation electromagnetic lock |
| CN108406051B (en) * | 2018-05-22 | 2021-05-18 | 江苏理工学院 | Welding seam tracking device |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1783515A (en) * | 1927-05-18 | 1930-12-02 | Harry W Montgomery | Valve actuation for a burglar-repelling device |
| US3190608A (en) * | 1962-02-07 | 1965-06-22 | Kromschroeder Ag G | Electromagnetically controlled valve |
| CN1272600A (en) * | 2000-05-12 | 2000-11-08 | 西南交通大学 | High-speed numerical control proportion valve |
| CN1588585A (en) * | 2004-07-15 | 2005-03-02 | 浙江大学 | Anti high voltage permanent magnet polarized two-way ratio electromagnet |
| CN202194875U (en) * | 2011-08-09 | 2012-04-18 | 江苏技术师范学院 | Linear servo device for hydraulic valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60136684A (en) * | 1983-12-23 | 1985-07-20 | Matsushita Electric Works Ltd | Solenoid-valve apparatus |
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2011
- 2011-08-09 CN CN 201110227007 patent/CN102305307B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1783515A (en) * | 1927-05-18 | 1930-12-02 | Harry W Montgomery | Valve actuation for a burglar-repelling device |
| US3190608A (en) * | 1962-02-07 | 1965-06-22 | Kromschroeder Ag G | Electromagnetically controlled valve |
| CN1272600A (en) * | 2000-05-12 | 2000-11-08 | 西南交通大学 | High-speed numerical control proportion valve |
| CN1588585A (en) * | 2004-07-15 | 2005-03-02 | 浙江大学 | Anti high voltage permanent magnet polarized two-way ratio electromagnet |
| CN202194875U (en) * | 2011-08-09 | 2012-04-18 | 江苏技术师范学院 | Linear servo device for hydraulic valve |
Non-Patent Citations (3)
| Title |
|---|
| JP昭60-136684A 1985.07.20 |
| PIC 单片机控制的μs 级PWM 脉冲电源的研究;皮定 等;《电加工与模具》;20110630(第3期);29－32 * |
| 皮定 等.PIC 单片机控制的μs 级PWM 脉冲电源的研究.《电加工与模具》.2011,(第3期),29－32. |
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Effective date of registration: 20150925 Address after: 226000 Nantong County, Jiangsu province Haian County town of Lee Road, No. 118 Patentee after: NANTONG HUADE FORGING MACHINE TOOL CO.,LTD. Patentee after: JIANGSU University OF TECHNOLOGY Address before: 213015 Changzhou Province in the Clock Tower District, Jiangsu, Wu Road, No. 1801 Patentee before: Jiangsu University of Technology |
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