CN202194875U - Linear servo device for hydraulic valve - Google Patents

Linear servo device for hydraulic valve Download PDF

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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
armature
pwm pulse
hydrovalve
cylindrical shell
power supply
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.)
Withdrawn - After Issue
Application number
CN2011202872976U
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Chinese (zh)
Inventor
杨浩轩
杨龙兴
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Jiangsu University of Technology
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Jiangsu University of Technology
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Publication date
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Priority to CN2011202872976U priority Critical patent/CN202194875U/en
Application granted granted Critical
Publication of CN202194875U publication Critical patent/CN202194875U/en
Anticipated expiration legal-status Critical
Withdrawn - After Issue legal-status Critical Current

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Abstract

The utility model belongs to a linear servo device for a hydraulic valve. The linear servo device comprises: a pair of cylinders arranged at an interval, a first magnet exciting coil and a second magnet exciting coil respectively sheathed on the pair of cylinders, a first armature and a second armature respectively arranged inside the pair of the cylinders, and a magnetic shielding body used for connecting the first armature and the second armature. The outer side end of the first armature is in rigid connection with the valve plug of the hydraulic valve; the power 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 power supply and a second PWM pulse direct-current power supply; and the first PWM pulse direct-current power supply and the second PWM pulse direct-current power supply are connected with an intelligent controller which is suitable for controlling the average voltage ratio of the PWM pulse outputted by the first PWM pulse direct-current power supply and the second PWM pulse direct-current power supply so as to control the shifting of the valve plug and then control the opening size of the hydraulic valve. In the utility model, single-coil direct-current ratio electromagnets are substituted with the armatures controlled by double coils, the opening size can be precisely and gradually controlled and the severe change of the movement state of a controlled object is avoided.

Description

A kind of linear servo device of hydrovalve
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.
Embodiment 1
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.
Spool 7 among Fig. 4 receives the control of first armature 3 to produce side-to-side movement, thus the opening h size through the said hydrovalve 6 of control, and then control inlet flow rate q1 realizes accurately proportional control to what of rate of discharge q2.
(embodiment 2)
The method of work of the linear servo device of described hydrovalve comprises:
Hydrovalve 6 is under the effect of its Returnning spring 8, and its initial position is a closed state;
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.
CN2011202872976U 2011-08-09 2011-08-09 Linear servo device for hydraulic valve Withdrawn - After Issue CN202194875U (en)

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

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CN2011202872976U Withdrawn - After Issue CN202194875U (en) 2011-08-09 2011-08-09 Linear servo device for hydraulic valve

Country Status (1)

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Cited By (2)

* Cited by examiner, † Cited by third party
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

Cited By (3)

* Cited by examiner, † Cited by third party
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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C14 Grant of patent or utility model
GR01 Patent grant
RGAV Abandon patent right to avoid regrant
AV01 Patent right actively abandoned

Granted publication date: 20120418

Effective date of abandoning: 20130710