CN202194875U - Linear servo device for hydraulic valve - Google Patents
Linear servo device for hydraulic valve Download PDFInfo
- Publication number
- CN202194875U CN202194875U CN2011202872976U CN201120287297U CN202194875U CN 202194875 U CN202194875 U CN 202194875U CN 2011202872976 U CN2011202872976 U CN 2011202872976U CN 201120287297 U CN201120287297 U CN 201120287297U CN 202194875 U CN202194875 U CN 202194875U
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- CN
- China
- Prior art keywords
- hydrovalve
- armature
- cylindrical shell
- pwm pulse
- spool
- 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.)
- Expired - Lifetime
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- 238000006073 displacement reaction Methods 0.000 claims abstract description 6
- 230000033001 locomotion Effects 0.000 abstract description 10
- 230000005284 excitation Effects 0.000 abstract 2
- 125000006850 spacer group Chemical group 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 4
- 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 2
- 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
- 238000005516 engineering process 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
- 238000004519 manufacturing process Methods 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
本实用新型属于一种液压阀的直线伺服装置，其包括：相间设置的一对筒体，分别套设于该对筒体上的第一、第二励磁线圈，分别设于该对筒体内的第一、第二衔铁，用于连接第一、第二衔铁的隔磁体；第一衔铁的外侧端与所述液压阀的阀芯刚性连接；第一、第二励磁线圈的电源端分别与第一、第二PWM脉冲直流电源相连；第一、第二PWM脉冲直流电源与一适于控制该第一、第二PWM脉冲直流电源输出的PWM脉冲的平均电压比而控制所述阀芯的位移、进而控制所述液压阀的开口大小的智能控制器相连。本实用新型采用双线圈控制衔铁芯代替单线圈直流比例电磁铁，可以精确、逐渐地控制开口的大小，避免了被控制物体出现运动状态的剧烈改变的情况。
The utility model belongs to a linear servo device for a hydraulic valve, which comprises: a pair of barrels arranged alternately, first and second excitation coils respectively sleeved on the pair of barrels, and coils respectively set in the pair of barrels. The first and second armatures are used to connect the spacer magnets of the first and second armatures; the outer end of the first armature is rigidly connected to the spool of the hydraulic valve; the power terminals of the first and second excitation coils are respectively connected to the first 1. The second PWM pulsed DC power supply is connected; the first and second PWM pulsed DC power supplies are suitable for controlling the displacement of the spool by the average voltage ratio of the PWM pulses output by the first and second PWM pulsed DC power supplies , and then connected to an intelligent controller that controls the opening size of the hydraulic valve. The utility model adopts double-coil control armature core instead of single-coil DC proportional electromagnet, can accurately and gradually control the size of the opening, and avoids the drastic change of the motion state of the controlled object.
Description
Technical field
The utility model relates to a kind of linear servo device of hydrovalve.
Background technique
Control unit in the hydrovalve Hydraulic Power Transmission System is the common components in the commercial production control, is used for direction, pressure and the flow of controlling 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 flow.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; Receive 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 magnetizes 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 of 1 arrival equilibrium position 2, position, and control accuracy is low.
The model utility content
The utility model technical problem to be solved provides a kind of linear servo device of simple in structure, hydrovalve that control accuracy is higher.
For solving the problems of the technologies described above; The linear servo device of the hydrovalve of the utility model; 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 said first, second cylindrical shell respectively, be used to connect the separated magnet of first, second armature; The outboard end of first armature and the spool of said 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 said spool and then control the openings of sizes of said hydrovalve links to each other.
Further, for strengthening the Electromagnetic Control effect, said first, second cylindrical shell is a 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 said first, second cylindrical shell; Described is to be used to be rigidly connected the cylindrical body of said first, second armature at a distance from magnet.During practical implementation, be provided with lubricant oil in the cylindrical shell.
The pipeline at said hydrovalve place is provided with the flow transducer of the openings of sizes that links to each other with said intelligent controller, be used to detect said hydrovalve.The openings of sizes of the said hydrovalve of this moment is suitable for calculating through hydraulic pressure value and specific discharge.
Compared with prior art; The utlity model has following advantage: (1) the utility model employing twin coil control armature core replaces original--the direct current proportion electro-magnet of mechanical structure; Can accurately, little by little control the size of opening, avoid being occurred the situation of the violent change of motion state by the control object.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 said 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 position for the armature in the linear servo device among Fig. 2;
Fig. 4 is the structural representation of said linear servo device control spool.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further.
Like 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 first, second armature 3,13 in said first, second cylindrical shell 2,12 respectively, be used to connect the separated magnet 5 of first, second armature 3,13; The spool 7 of the outboard end of first armature 3 and said hydrovalve 6 is rigidly connected; The power end of first, second field coil 4,14 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 said spool and then control the openings of sizes of said hydrovalve links to each other.
Wherein, the 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 ", 2011 03 phases.
Said first, second cylindrical shell 2,12 is a magnetic conductive cylinder, and the two end part of first, second cylindrical shell 2,12 are connected with first, second magnetic guiding loop 1,11 respectively.
Said first, second cylindrical shell 2,12 coaxial settings; Described at a distance from magnet 5 cylindrical body for said first, second armature 3,13 that is used to be rigidly connected.
The pipeline at said hydrovalve 6 places is provided with the flow transducer of the openings of sizes that links to each other with said intelligent controller, be used to detect said hydrovalve.
Like Fig. 2; First, second armature 3, use between 13 at a distance from magnet 5 (like copper) and 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 used 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 equated that the magnetic field suction that is produced also equates; But, do not have axial force to produce, and first armature 3 does not arrive the equilibrium position, receives the effect of axial force to the right, can drive second armature 13 and move right because second armature 13 is balance in the illustrated case.But along with moving right of second armature 13, also be in non-equilibrium site, receive 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; Just slowly move gradually controllably the equilibrium position, 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 preset openings of sizes; Intelligent controller first, second pwm pulse DC electrical source of control is earlier exported first, second pwm pulse that is strengthened gradually by zero beginning respectively; Change simultaneously the average voltage ratio of first, second pwm pulse gradually; So that the magnetic force on said first, second armature 3,13 is unbalance and overcome the active force of the Returnning spring 8 in this hydrovalve 8, and makes the spools 7 in this hydrovalve 8 that slowly displacement take place, slowly to open this hydrovalve 8; When the opening of this hydrovalve 8 reaches preset size; Keep current said first, second pwm pulse average voltage ratio, this moment, said spool was in the equilibrium position under the effect of said first, second armature 3,13, and the openings of sizes of said hydrovalve 6 is remained unchanged;
When needs are adjusted the openings of sizes of this hydrovalve 6; Intelligent controller is adjusted said first, second pwm pulse average voltage ratio gradually; The said spool 7 of this moment is slowly adjusted the equilibrium position under the effect of said first, second armature 3,13; When the opening of said hydrovalve 6 reaches required size, stop to change the average voltage ratio of said 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 said first, second pwm pulse average voltage ratio gradually; So that said spool 7 under the effect of said first, second armature slowly to the operating position displacement; When said hydrovalve 6 cuts out, stop to export said first, second pwm pulse.
Said intelligent controller detects the openings of sizes of said hydrovalve 6 through said flow transducer, to adjust the average voltage ratio of first, second pwm pulse gradually, in real time, makes the openings of sizes of said hydrovalve 6 remain on preset size.
The foregoing description of the utility model be merely that explanation the utility model does for example, and the utility model mode of execution is not limited thereto.Be the equivalence replacement for the modification of being done under spirit that belongs to the utility model and the principle, combination, simplification, substitute etc., all still be included within the protection domain of the utility model.
Claims (3)
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 said first, second cylindrical shell respectively, be used to connect the separated magnet of first, second armature;
The outboard end of first armature and the spool of said 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 said spool and then control the openings of sizes of said hydrovalve links to each other.
2. the linear servo device of hydrovalve according to claim 1, it is characterized in that: said first, second cylindrical shell is a magnetic conductive cylinder, and the two end part of first, second cylindrical shell are connected with first, second magnetic guiding loop respectively;
The coaxial setting of said first, second cylindrical shell; Described is to be used to be rigidly connected the cylindrical body of said first, second armature at a distance from magnet.
3. the linear servo device of hydrovalve according to claim 2 is characterized in that: the pipeline at said hydrovalve place is provided with the flow transducer of the openings of sizes that links to each other with said intelligent controller, be used to detect said hydrovalve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202872976U CN202194875U (en) | 2011-08-09 | 2011-08-09 | Linear servo device for hydraulic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202872976U CN202194875U (en) | 2011-08-09 | 2011-08-09 | Linear servo device for hydraulic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202194875U true CN202194875U (en) | 2012-04-18 |
Family
ID=45949790
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202872976U Expired - Lifetime CN202194875U (en) | 2011-08-09 | 2011-08-09 | Linear servo device for hydraulic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202194875U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305307A (en) * | 2011-08-09 | 2012-01-04 | 江苏技术师范学院 | Linear servo device of hydraulic valve and operating 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 |
-
2011
- 2011-08-09 CN CN2011202872976U patent/CN202194875U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102305307A (en) * | 2011-08-09 | 2012-01-04 | 江苏技术师范学院 | Linear servo device of hydraulic valve and operating method thereof |
| CN102305307B (en) * | 2011-08-09 | 2013-07-10 | 江苏理工学院 | Linear servo device of hydraulic valve and operating 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 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120418 Effective date of abandoning: 20130710 |
|
| RGAV | Abandon patent right to avoid regrant |