CN101482131A - On-line equalization internal leaking electric zero-adjusting method of servo valve - Google Patents
On-line equalization internal leaking electric zero-adjusting method of servo valve Download PDFInfo
- Publication number
- CN101482131A CN101482131A CNA200810010049XA CN200810010049A CN101482131A CN 101482131 A CN101482131 A CN 101482131A CN A200810010049X A CNA200810010049X A CN A200810010049XA CN 200810010049 A CN200810010049 A CN 200810010049A CN 101482131 A CN101482131 A CN 101482131A
- Authority
- CN
- China
- Prior art keywords
- zero
- main valve
- feedback signal
- valve
- feedback
- 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.)
- Pending
Links
Abstract
The invention relates to a servo valve online balanced internally leaked electric zero adjusting method which comprises the steps as follows: 1) a main valve zero point is adjusted, a width spread potentiometer on a feedback card is adjusted, a main valve feedback signal is observed to ensure that the signal value reaches positive and negative limited position values; 2) under the state that a device is introduced with oil, an electric feedback main valve feedback signal of the main valve is observed, a pilot valve zero adjusting potentiometer on the feedback card is adjusted to ensure that the main valve feedback signal is zero; 3) the main valve feedback signal is observed after a period of time, if the main feedback signal is at the positive and negative limited position value, the main feedback signal is required to be adjusted again, until the main valve feedback signal is zero, and if the main valve feedback signal is kept as zero or in a slowly free state, the pilot valve zero adjustment is finished. The method is used for adjusting the zero point of a pilot valve, no matter whether the natural zero point of a servo valve restoring spring deviates or not, the method can always ensure that the servo valve works near the real zero point, thereby ensuring that the working stability of the servo valve, prolonging the online service life of the servo valve and being fit for current Chinese technical and economic status.
Description
Technical field
The present invention relates to a kind of servovalve adjusting method, particularly related to a kind of on-line equalization internal leaking electric zero-adjusting method of servo valve.
Background technique
Servovalve generally all is applied on the important quality control system, is the important step of quality control.The quality of its working state directly has influence on the quality index of product, under the situation of bad working state, production accident takes place very easily, brings about great losses to enterprise.The electric acyclic homologically trioial method of traditional servovalve is based on the servovalve Returnning spring and adjusts the natural zero point under no stressing conditions, but the fatal shortcoming of this method is, if mechanical bias takes place zero point in spring, also be offset electric zero point, thereby cause the servovalve job insecurity.If the serious servovalve of zero migration then can't use, machine is repaired down.Servovalve all can't proper functioning after the electric acyclic homologically trioial when serious.Thereby cause the stopping production of steel-fastening or long period.
Summary of the invention
The present invention has overcome deficiency of the prior art, and a kind of on-line equalization internal leaking electric zero-adjusting method of servo valve accurately is provided.
In order to address the above problem, the present invention by the following technical solutions:
A kind of on-line equalization internal leaking electric zero-adjusting method of servo valve is characterized in that this method may further comprise the steps:
1) adjusts main valve zero point: adjust on the feedback card and spread potentiometer, observe the main valve feedback signal, make its signal numerical value reach both positive and negative polarity extreme position value;
2) under the state of the logical oil of equipment, observe the electric feedback main valve feedback signal of main valve; Adjust pilot valve zero potentiometer on the feedback card, make that the main valve feedback signal is zero;
3) certain interval of time continues to observe the main valve feedback signal, if the main valve feedback signal is a both positive and negative polarity extreme position value, then need to adjust once more, and be zero until the main valve feedback signal; If the main valve feedback signal remains on zero or is slow free state, then the pilot valve acyclic homologically trioial finishes.
Compared with prior art, the invention has the beneficial effects as follows: by the position feed back signal of main valve, adjust the zero point of pilot valve, no matter whether be offset the natural zero point of servovalve Returnning spring, all the time can guarantee that servovalve was operated near true zero point, overcome the signal errors that conventional method forms owing to the mechanically deformation of spring, thereby guaranteed the stability of servovalve work.
Description of drawings
Fig. 1 is a pilot valve schematic representation of the present invention.
Embodiment
Traditional servovalve adjusting zero method is: pilot valve and main valve are benchmark with state separately, respectively zeroing; And the Returnning spring of pilot valve can produce mechanically deformation in long-term using process, is the benchmark zeroing with original stress more at this moment, will certainly produce error, makes servovalve depart from dead-center position work.
The foundation of the inventive method is:
As shown in Figure 1: spool was to be in the zero-bit state when C1 and C2 mouth were closed, and leakage a little P s mouth and Ex mouth between can occur at the engagement edge of spool and valve pocket this moment, this leakage be called servovalve in let out.
Pilot valve when zero-bit in let out the left chamber and the right ventricle that can enter main valve simultaneously, if pilot valve, then flows into the oil mass difference of main valve plug both sides not in zero-bit, can cause main valve plug slowly to move to a side of low fuel pressure (oil mass is few); If pilot valve is in zero-bit, the then interior discharge left and right sides is identical, the left chamber of main valve identical with right ventricle's oil pressure (oil mass is identical), and it is motionless that main valve plug is in neutral position (zero point).
Based on above principle, the position state signal feedback by main valve plug can be judged whether zero migration of pilot valve, thereby accurately adjust.
The step of the inventive method is:
1) adjusts main valve zero point: adjust on the feedback card and spread potentiometer, observe the main valve feedback signal, make its signal numerical value reach both positive and negative polarity extreme position value ± 2.5V;
2) under the state of the logical oil of equipment, observe the electric feedback main valve feedback signal of main valve; Adjust pilot valve zero potentiometer on the feedback card, make that the main valve feedback signal is zero;
3) certain interval of time continues to observe the main valve feedback signal, if the main valve feedback signal is both positive and negative polarity extreme position value ± 2.5V, then need to adjust once more, and be zero until the main valve feedback signal; If the main valve feedback signal remains on zero or is slow free state, then the pilot valve acyclic homologically trioial finishes.
Claims (1)
1, a kind of on-line equalization internal leaking electric zero-adjusting method of servo valve is characterized in that this method may further comprise the steps:
1) adjusts main valve zero point: adjust on the feedback card and spread potentiometer, observe the main valve feedback signal, make its signal numerical value reach both positive and negative polarity extreme position value;
2) under the state of the logical oil of equipment, observe the electric feedback main valve feedback signal of main valve; Adjust pilot valve zero potentiometer on the feedback card, make that the main valve feedback signal is zero;
3) certain interval of time continues to observe the main valve feedback signal, if the main valve feedback signal is a both positive and negative polarity extreme position value, then need to adjust once more, and be zero until the main valve feedback signal; If the main valve feedback signal remains on zero or is slow free state, then the pilot valve acyclic homologically trioial finishes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810010049XA CN101482131A (en) | 2008-01-08 | 2008-01-08 | On-line equalization internal leaking electric zero-adjusting method of servo valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810010049XA CN101482131A (en) | 2008-01-08 | 2008-01-08 | On-line equalization internal leaking electric zero-adjusting method of servo valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101482131A true CN101482131A (en) | 2009-07-15 |
Family
ID=40879376
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810010049XA Pending CN101482131A (en) | 2008-01-08 | 2008-01-08 | On-line equalization internal leaking electric zero-adjusting method of servo valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101482131A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297282A (en) * | 2010-06-25 | 2011-12-28 | 鞍钢股份有限公司 | Online zeroing method for proportional valve |
| CN109944838A (en) * | 2019-04-09 | 2019-06-28 | 鞍钢股份有限公司 | A kind of online adjusting zero method of servo valve mechanical zero |
| CN110030231A (en) * | 2019-04-24 | 2019-07-19 | 中国航发控制系统研究所 | A kind of online debugging device of electrohydraulic servo valve |
-
2008
- 2008-01-08 CN CNA200810010049XA patent/CN101482131A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297282A (en) * | 2010-06-25 | 2011-12-28 | 鞍钢股份有限公司 | Online zeroing method for proportional valve |
| CN109944838A (en) * | 2019-04-09 | 2019-06-28 | 鞍钢股份有限公司 | A kind of online adjusting zero method of servo valve mechanical zero |
| CN110030231A (en) * | 2019-04-24 | 2019-07-19 | 中国航发控制系统研究所 | A kind of online debugging device of electrohydraulic servo valve |
| CN110030231B (en) * | 2019-04-24 | 2020-11-27 | 中国航发控制系统研究所 | Online adjusting device of electro-hydraulic servo valve |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101482131A (en) | On-line equalization internal leaking electric zero-adjusting method of servo valve | |
| EP2203263B1 (en) | Operating method for a cooling section having centralized detection of valve characteristics and objects corresponding thereto | |
| CN106246456A (en) | Position method of adjustment in a kind of speed regulator main control valve electrically middle position and proportioning valve | |
| DE102008028190A1 (en) | Method for operating an electropneumatic valve | |
| KR20090132703A (en) | Method for measuring status of servo valve | |
| KR20170032684A (en) | Reprocessing method of an injector with control valve for commmon rail system | |
| CN108468616B (en) | Speed regulator proportional valve neutral position adjusting method based on static balance of hydraulic servo system | |
| CN102297282A (en) | Online zeroing method for proportional valve | |
| CN112570468A (en) | Control method for preventing steel coil from being staggered by clamping and feeding roller of coiling machine of hot rolling production line | |
| US9446581B2 (en) | Ink supply device for printing machine | |
| CN104043656A (en) | Method for testing hydraulic state of dynamic roll gaps through static pressure maintaining | |
| CN106154827A (en) | A kind of servo-control signal compensation method | |
| CN104018894B (en) | The check processing method of electrohydraulic steam turbine controlling system pulsatile impact | |
| KR20170109744A (en) | Test apparatus of servo valve and method thereof | |
| CN110273405A (en) | Double-cylinder hydraulic gate oil cylinder journey error compensation method based on PID control | |
| CN113985818A (en) | Task scheduling method and system for steam turbine servo card and steam turbine servo card | |
| CN204064579U (en) | A kind of hydraulic quick coupling combined test stand | |
| CN201322017Y (en) | Air pressure balance type end cover for direct-acting type electro hydraulic servo valve | |
| CN105277321A (en) | Comprehensive testboard for hydraulic quick joint | |
| CN105739307A (en) | Proportional pressure reducing valve hysteresis compensation device based on self-adaptive robust control and method thereof | |
| CN202903458U (en) | Optical fiber macrobend loss testing tool | |
| CN204302839U (en) | The control device of gas in incubator | |
| CN102980745A (en) | Macrobend loss test tool of optical fiber | |
| EP4272553A3 (en) | Device for the application of transitional resistance reducing media and application of electricity to plants | |
| CN206351418U (en) | A kind of hot-pressing fixture |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090715 |