CN204226322U - A kind of electrohydraulic control - Google Patents
A kind of electrohydraulic control Download PDFInfo
- Publication number
- CN204226322U CN204226322U CN201420667150.3U CN201420667150U CN204226322U CN 204226322 U CN204226322 U CN 204226322U CN 201420667150 U CN201420667150 U CN 201420667150U CN 204226322 U CN204226322 U CN 204226322U
- Authority
- CN
- China
- Prior art keywords
- armature
- spool
- end cap
- valve body
- magnet case
- 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.)
- Active
Links
Abstract
A kind of electrohydraulic control, comprise power stage guiding valve, prestage torque motor, described power stage guiding valve comprises valve body, spool, valve pocket and left end cap, right end cap, valve body is provided with fuel supply chamber Ps, and the chamber, left and right of spool is connected with the left and right oil circuit on valve body top by the oil circuit on left end cap, right end cap by fuel supply chamber Ps respectively; Prestage torque motor comprises base, upper magnet case, lower magnet case, coil is provided with in upper magnet case, magnet steel, armature assembly is provided with between upper magnet case and lower magnet case, armature assembly comprises armature, armature is provided with feedback rod, and through baffle plate linking springs pipe outside feedback rod, described base is provided with two nozzles, baffle plate opposite sides is corresponding two nozzles respectively, and two nozzles communicate with left and right, valve body top oil circuit respectively; Described feedback rod connects spool.There is highly sensitive, stable and reliable for performance, shock resistance and vibration, tracking velocity is fast, noise is little feature, and there is stable Static output and good dynamic indicator simultaneously.
Description
Technical field
The utility model relates to a kind of electrohydraulic control, particularly a kind of Dual Injector Baffle type secondary electrohydraulic control.
Background technique
Current domestic Dual Injector Baffle type secondary electrohydraulic control design theory is still immature, generally adopts the method for test to develop the type servovalve.In existing Dual Injector Baffle electrohydraulic control, between nozzle with base, adopt is threaded more, and this kind is connected in later long-term work may cause thread looseness, makes valve job insecurity; Feedback rod end steel ball many employings riveted joint form in addition, may cause in the long-term work of guiding valve level spool after this kind is connected to steel ball be connected with feedback rod between loosen, thus there will be oscillation phenomenon.A kind of electrohydraulic control involved by the utility model, adopts interference fit to be connected between its nozzle with base, and feedback rod end steel ball and feedback rod make integrated type, so just well can improve above mentioned valve job insecurity and oscillation phenomenon.
Model utility content
Its object of the utility model is just to provide a kind of electrohydraulic control, has highly sensitive, stable and reliable for performance, shock resistance and vibration, tracking velocity is fast, noise is little feature, and has stable Static output and good dynamic indicator simultaneously.
Realize above-mentioned purpose and the technological scheme taked, comprise power stage guiding valve, prestage torque motor, described power stage guiding valve comprises valve body, spool, valve pocket and left end cap, right end cap, valve body is provided with fuel supply chamber Ps, and the chamber, left and right of spool is connected with the left and right oil circuit on valve body top by the oil circuit on left end cap, right end cap by fuel supply chamber Ps respectively; Prestage torque motor comprises base, upper magnet case, lower magnet case, coil is provided with in upper magnet case, magnet steel, armature assembly is provided with between upper magnet case and lower magnet case, armature assembly comprises armature, armature is provided with feedback rod, and through baffle plate linking springs pipe outside feedback rod, described base is provided with two nozzles, baffle plate opposite sides is corresponding two nozzles respectively, and two nozzles communicate with left and right, valve body top oil circuit respectively; Described feedback rod connects spool.
Compared with prior art the utility model has the following advantages.
The pressure in two chambeies about regulating spool is carried out by the deflection of baffle plate, spool is connected with torque motor and reaches the effect of machine feedback by the feedback rod in prestage in armature assembly, there is highly sensitive, stable and reliable for performance, shock resistance and vibration, tracking velocity is fast, noise is little feature, and there is stable Static output and good dynamic indicator simultaneously.
Accompanying drawing explanation
Below in conjunction with accompanying drawing, the utility model is described in further detail.
Fig. 1 is this apparatus structure schematic diagram;
Fig. 2 is the structural representation of power stage guiding valve in this device;
Fig. 3 is the structural representation of torque motor in this device;
Fig. 4 is the structural representation of armature assembly in this device.
Embodiment
Comprise power stage guiding valve, prestage torque motor, as shown in Figure 1, described power stage guiding valve comprises valve body 4, spool 2, valve pocket 1 and left end cap 7, right end cap 3, as shown in Figure 2, valve body 4 is provided with fuel supply chamber Ps, and the chamber, left and right of spool 2 is connected with the left and right oil circuit on valve body 4 top by the oil circuit on left end cap 7, right end cap 3 by fuel supply chamber Ps respectively; Prestage torque motor comprises base 12, upper magnet case 9, lower magnet case 8, as shown in Figure 3, coil 10 is provided with in upper magnet case 9, magnet steel 11, armature assembly 5 is provided with between upper magnet case 9 and lower magnet case 8, armature assembly 5 comprises armature 13, as shown in Figure 4, armature 13 is provided with feedback rod 16, through baffle plate 15 linking springs pipe 14 outside feedback rod 16, described base 12 is provided with two nozzles 6, baffle plate 15 opposite sides respectively corresponding two nozzles 6, two nozzles 6 communicates with left and right, valve body 4 top oil circuit respectively; Described feedback rod 16 connects spool 2.
Described spool 2 cylindrical and valve pocket 1 endoporus match grinding, matching gap is 0.002 ~ 0.004mm.
Described nozzle 6 and base 12 interference fit, magnitude of interference is 0.01 ~ 0.014mm, and two nozzle 6 spacings are 0.12 ~ 0.14mm.
Described armature about 13 two magnet steel 11 produce polar flux, and armature 13 two ends are stretched in the air gap of flux circuit, form both sides totally four air gaps, width of air gap 0.58 ~ 0.63mm; Described bourdon tube 14 lower end is fixed by screws on base 12, the external cylindrical surface of bourdon tube 14 upper end and inner cylindrical surface respectively with armature 13 and baffle plate 15 interference fit, magnitude of interference is respectively 0.005 ~ 0.007mm and 0.009 ~ 0.012mm, feedback rod 16 and baffle plate 15 interference fit, magnitude of interference is 0.009 ~ 0.012mm.
Described armature assembly 5 is fixed on base 12 by bourdon tube 14, and the steel ball of feedback rod 16 lower end in armature assembly 5 inserts in the sipes in the middle of spool 2, and the matching gap of steel ball and sipes is 0.002 ~ 0.003mm.
Embodiment
This device is a kind of Dual Injector Baffle type secondary electrohydraulic control in electrohydraulic servo-controlling system, is widely used in various electrohydraulic servo-controlling system.
Comprise power stage guiding valve, prestage torque motor, described power stage guiding valve comprises valve body 4, spool 2, valve pocket 1 and left end cap 7, right end cap 3, as shown in Figure 1, the chamber, left and right of spool 2 is connected with left and right, valve body 4 top oil circuit by the oil circuit on the end cap of two, left and right by fuel supply chamber Ps respectively; Two nozzles 6 are had in described prestage torque motor, there is baffle plate 15 at middle part, baffle plate 15 opposite sides is corresponding two nozzles 6 respectively, two nozzles 6 communicate with left and right, valve body 4 top oil circuit respectively, carried out the pressure in regulating spool about 2 two chamber by the deflection of baffle plate 15, in prestage, spool 2 is connected with torque motor and reaches the effect of machine feedback by the feedback rod 16 of armature assembly 5 li in addition.
Described spool 2 cylindrical and valve pocket 1 endoporus match grinding, matching gap 0.002 ~ 0.004mm.
Described prestage torque motor comprises magnet case 9, lower magnet case 8, magnet steel 11, coil 10, nozzle 6, base 12 and armature assembly 5, and armature assembly 5 comprises armature 13, bourdon tube 14, baffle plate 15 and feedback rod 16; Nozzle 6 and base 12 interference fit, magnitude of interference is 0.01 ~ 0.014mm, and two injector spacings are from being 0.12 ~ 0.14mm; Two magnet steel 11 produce polar flux, armature 13 two ends are stretched in the air gap of flux circuit, form both sides totally four air gaps, width of air gap 0.58 ~ 0.63mm, bourdon tube 14 lower end is fixed by screws on base 12, the external cylindrical surface of bourdon tube 14 upper end and inner cylindrical surface respectively with armature 13 and baffle plate 15 interference fit, magnitude of interference is respectively 0.005 ~ 0.007mm and 0.009 ~ 0.012mm, feedback rod 16 and baffle plate 15 interference fit, magnitude of interference is 0.009 ~ 0.012mm.
Described armature assembly 5 is fixed on base 12 by bourdon tube 14, and the steel ball of feedback rod 16 lower end now in armature assembly 5 just inserts in the sipes in the middle of spool 2, the matching gap 0.002 ~ 0.003mm of steel ball and sipes.
Two, left and right in power stage guiding valve end cap offers oil circuit, and the chamber, left and right of spool is connected with left and right, valve body top oil circuit by the oil circuit on the end cap of two, left and right by fuel supply chamber respectively.
Prestage torque motor produces polar flux by two magnet steel, armature two ends are stretched in the air gap of flux circuit, form both sides totally four air gaps, width of air gap 0.58 ~ 0.63mm, bourdon tube lower end is fixed by screws on base, the external cylindrical surface of bourdon tube upper end and inner cylindrical surface respectively with armature and baffle plate interference fit, feedback rod upper end and baffle plate interference fit, feedback rod lower end, without constraint, makes torque motor can obtain right combination rigidity.
Armature assembly simultaneously as the force feedback element between power stage and prestage, and makes the feedback rod in armature assembly have rational power placement property.
The key technical indexes:
Coil resistance: 80 ± 8 Ω (under 20 DEG C of conditions)
Insulation resistance > 50M Ω
Rated current ± 40 mA
Rated pressure 21 MPa
Rated flow 4,10,19,22,38,63 L/min ± 10% Qn(Δ P=7Mpa)
The linearity≤7.5%
Degree of symmetry≤10%
Stagnant ring≤4%
Interior leakage≤3%Qn+0.5 × 2 L/min
Resolution≤1%
Pressure gain >=30% Δ P/1%In
Zero partially≤2%
Every drift≤2%
Frequency characteristic >=30Hz
Working principle
As shown in Figure 1, high pressure oil continuous print from fuel supply chamber Ps by oil purifier and fixed orifice, be connected with left and right, valve body top oil circuit respectively in the chamber, left and right of spool by the oil circuit on the end cap of two, left and right, left and right, valve body top oil circuit communicates with the nozzle of two in torque motor respectively.When input current is zero, armature assembly does not stress and does not deflect, and the pressure flow that baffle plate two sides is subject to nozzle is equal, and the pressure at spool two ends is identical, and spool remains on neutral position, and valve does not export.When to torque motor coil input control electric current, owing to controlling the interaction of magnetic flux and polar flux, armature produces a control moment, this moment makes armature assembly deflect, and drives bourdon tube deflection, makes swung, spool two ends control chamber is caused to produce pressure reduction, cause spool travel, thus delivery pressure and flow, the output flow of servovalve is directly proportional to the instruction electrical signal of input.
As shown in Figure 3, two nozzles 6 are distributed in baffle plate 15 both sides, and symmetrical distribution, each nozzle 6 is 0.06 ~ 0.07mm to the distance of baffle-panels.Input instruction signal will produce electromagnetic force in the two ends of armature 13 to the coil 10 of torque motor, and this makes armature assembly 5(be made up of armature 13, bourdon tube 14, baffle plate 15 and feedback rod 16) deflect, and then drive baffle plate 15 to deflect.And the deflection of baffle plate 15 will reduce the flow of one of them nozzle 6, and then change the pressure of spool 2 side communicated with this nozzle 6, thus promote spool 2 towards mobile.The now displacement of spool 2 produces an active force to feedback rod 16, and this active force defines the restoring moment to armature assembly 5.When the electromagnetic torque of this restoring moment and torque motor balances each other, armature assembly 5 will keep balance, and so spool will remain on the enable possition of this state of equilibrium, until the Setting signal of input changes again.
Making by being connected above both to have connected between each part reliably, larger distortional stress can not be produced again, torque motor is obtained and stablizes rational mechanical stiffness.Stablizing rational mechanical stiffness makes torque motor under same instructions signal, have larger pendulum angle and very little hysteresis, makes servovalve have stable static output characteristic.
Armature assembly is the important component part ensureing in this device that valve linear stable exports, and obtains specific force-displacement behavior, greatly improves the static output characteristic of valve, realizes its force-displacement behavior by choosing of feedback rod material with suitable heat treatment method.
Claims (5)
1. an electrohydraulic control, comprise power stage guiding valve, prestage torque motor, it is characterized in that, described power stage guiding valve comprises valve body (4), spool (2), valve pocket (1) and left end cap (7), right end cap (3), valve body (4) is provided with fuel supply chamber Ps, and the chamber, left and right of spool (2) is connected with the left and right oil circuit on valve body (4) top by the oil circuit on left end cap (7), right end cap (3) by fuel supply chamber Ps respectively, prestage torque motor comprises base (12), upper magnet case (9), lower magnet case (8), coil (10) is provided with in upper magnet case (9), magnet steel (11) is provided with between upper magnet case (9) and lower magnet case (8), armature assembly (5), armature assembly (5) comprises armature (13), armature (13) is provided with feedback rod (16), feedback rod (16) outside is through baffle plate (15) linking springs pipe (14), described base (12) is provided with two nozzles (6), baffle plate (15) opposite sides is corresponding two nozzles (6) respectively, two nozzles (6) communicate with valve body (4) left and right, top oil circuit respectively, described feedback rod (16) connects spool (2).
2. a kind of electrohydraulic control according to claim 1, is characterized in that, described spool (2) cylindrical and valve pocket (1) endoporus match grinding, matching gap is 0.002 ~ 0.004mm.
3. a kind of electrohydraulic control according to claim 1, is characterized in that, described nozzle (6) and base (12) interference fit, and magnitude of interference is 0.01 ~ 0.014mm, and two nozzles (6) spacing is 0.12 ~ 0.14mm.
4. a kind of electrohydraulic control according to claim 1, it is characterized in that, upper and lower two magnet steel (11) of described armature (13) produce polar flux, and armature (13) two ends are stretched in the air gap of flux circuit, form both sides totally four air gaps, width of air gap 0.58 ~ 0.63mm; Described bourdon tube (14) lower end is fixed by screws on base (12), the external cylindrical surface of bourdon tube (14) upper end and inner cylindrical surface respectively with armature (13) and baffle plate (15) interference fit, magnitude of interference is respectively 0.005 ~ 0.007mm and 0.009 ~ 0.012mm, feedback rod (16) and baffle plate (15) interference fit, magnitude of interference is 0.009 ~ 0.012mm.
5. a kind of electrohydraulic control according to claim 1, it is characterized in that, described armature assembly (5) is fixed on base (12) by bourdon tube (14), the steel ball of feedback rod (16) lower end in armature assembly (5) inserts in the sipes in the middle of spool (2), and the matching gap of steel ball and sipes is 0.002 ~ 0.003mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420667150.3U CN204226322U (en) | 2014-11-11 | 2014-11-11 | A kind of electrohydraulic control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420667150.3U CN204226322U (en) | 2014-11-11 | 2014-11-11 | A kind of electrohydraulic control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204226322U true CN204226322U (en) | 2015-03-25 |
Family
ID=52924424
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420667150.3U Active CN204226322U (en) | 2014-11-11 | 2014-11-11 | A kind of electrohydraulic control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204226322U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105570225A (en) * | 2016-03-03 | 2016-05-11 | 安徽万荣航天设备有限公司 | Ultra-low-pressure large-flow electro-hydraulic servo valve |
| CN106678102A (en) * | 2015-11-06 | 2017-05-17 | 中国航空工业第六八研究所 | Deflecting plate jet flow electro-hydraulic servo valve based on piezoelectric structure |
| CN108716489A (en) * | 2018-08-07 | 2018-10-30 | 上海航天控制技术研究所 | A kind of Electric hydraulic pressure servo valve power level structure |
| CN111102261A (en) * | 2019-12-24 | 2020-05-05 | 中航工业南京伺服控制系统有限公司 | Force feedback positive gain type electro-hydraulic pressure servo valve |
-
2014
- 2014-11-11 CN CN201420667150.3U patent/CN204226322U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106678102A (en) * | 2015-11-06 | 2017-05-17 | 中国航空工业第六八研究所 | Deflecting plate jet flow electro-hydraulic servo valve based on piezoelectric structure |
| CN105570225A (en) * | 2016-03-03 | 2016-05-11 | 安徽万荣航天设备有限公司 | Ultra-low-pressure large-flow electro-hydraulic servo valve |
| CN108716489A (en) * | 2018-08-07 | 2018-10-30 | 上海航天控制技术研究所 | A kind of Electric hydraulic pressure servo valve power level structure |
| CN108716489B (en) * | 2018-08-07 | 2020-04-10 | 上海航天控制技术研究所 | Power stage structure of electro-hydraulic pressure servo valve |
| CN111102261A (en) * | 2019-12-24 | 2020-05-05 | 中航工业南京伺服控制系统有限公司 | Force feedback positive gain type electro-hydraulic pressure servo valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204226322U (en) | A kind of electrohydraulic control | |
| CN107203184B (en) | The dynamic control method of straight line steering engine Electric Loading System | |
| CN105525697B (en) | The intelligent bypass type fluid linking damper that stacked piezoelectric driver is adjusted | |
| WO2015120683A1 (en) | A single-degree-of-freedom magnetic vibration isolation device | |
| CN202182074U (en) | High-flow jet pipe type secondary electro-hydraulic servo valve | |
| CN103398138B (en) | Damping-rigidness-controllable double-freedom-degree vibration active control platform | |
| CN102808811A (en) | Two-stage electro-hydraulic servo valve based on giant magnetostrictive electro-mechanical actuator GMA | |
| CN105221508A (en) | A kind of actuating motor direct-driving type servovalve | |
| CN102242742A (en) | Two-stage jet nozzles series super-magnetostrictive jet servo valve and operating method thereof | |
| CN204436910U (en) | A kind of asymmetric hydraulic efficiency servo-valve | |
| CN111963602B (en) | Bistable nonlinear energy hydrazine based on electromagnetic negative stiffness | |
| CN107606018A (en) | A kind of hourglass shape electromagnetism vibration isolator | |
| CN105070179A (en) | Electric linear load simulator | |
| CN105840727A (en) | Stiffness-adjustable mechanism coupled by axial magnetic force | |
| CN103671293B (en) | Floating weight of banbury mixer oil cylinder hydraulic control method and device | |
| CN103354412A (en) | High-frequency micro-displacement driving apparatus and control method | |
| CN202228587U (en) | Magnetorheological damper with multi-magnet-coil structure | |
| CN204371811U (en) | A kind of direct drive Electric hydraulic pressure servo valve | |
| CN103499488B (en) | A kind of Hopkinson pressure bar that with the addition of magnetic field control device | |
| CN104613034A (en) | Electro-hydraulic servo valve with safety protection devices | |
| CN205136188U (en) | Servo motor directly drives type servovalve | |
| CN205260716U (en) | Magneto rheological damper with two -stage damping force output control | |
| CN2846835Y (en) | Pressure flow electrohydraulic servo valve | |
| CN104916409B (en) | A kind of rapid response type self-excitation type magnet controlled reactor | |
| CN201714727U (en) | Nozzle baffle valve with damping throttler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |