CN1434218A - Novel nozzle baffle-plate type servo valve - Google Patents
Novel nozzle baffle-plate type servo valve Download PDFInfo
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- CN1434218A CN1434218A CN 03111075 CN03111075A CN1434218A CN 1434218 A CN1434218 A CN 1434218A CN 03111075 CN03111075 CN 03111075 CN 03111075 A CN03111075 A CN 03111075A CN 1434218 A CN1434218 A CN 1434218A
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- nozzle
- baffle plate
- piezoelectric stack
- baffle
- novel
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Abstract
The present invention relates to a new-type nozzle baffle plate servo valve. It is formed from nozzles which are communicated by means of fluid channel system, slide valve and filtering tube which are respectively set in the valve seat body and valve body. It is characterized by that the outlet positions correspondent to the nozzles are respectively equipped with baffle plates fixedly connected with piezoelectric piles, said invention utilizes the expansion and contraction of piezoelectric piles to implement the increment and decrement of gap between baffle plate and nozzles.
Description
Technical field
The present invention relates to a kind of improved electrohydraulic control.
Background technique
Electrohydraulic control is fast with the electric signal transmission speed, the computing pretreatment convenient, be easy to realize advantage such as distant control and hydraulic servomechanism response soon, output power is big, volume is little, advantages such as in light weight, be a kind of important servomechanism, be widely used in each civilian and defense industrial sector.Electrohydraulic control is electric liquid conversion and a power amplification element wherein, and as the servocontrol link of closed loop control system, the quality of its performance plays decisive action to whole system.Therefore, electrohydraulic control novel, superior performance has broad application prospects.
Traditional Dual Injector Baffle formula electrohydraulic control is driven by the electromagnetic type torque motor.The driver of novel executive component as servovalve appearred adopting in recent years.Utilize electrostriction element to make the baffle plate of servovalve as the pool side ocean of Japan etc., substitute the bourdon tube structure.This structure has two shortcomings: the stagnant ring that (1) is bigger; (2) baffle arrangement rigidity is little, is subject to the flow stream pressure influence during work.
Summary of the invention
The objective of the invention is provides a kind of novel nozzle baffle type servovalve for solving shortcomings such as the big ring that stagnates, baffle arrangement rigidity that present electrohydraulic control exists are little.
Nozzle baffle type servovalve of the present invention, constitute by twin nipple and guiding valve, the screen pipe that are arranged in pedestal and the valve body by liquid paths system connectivity, it is characterized in that being provided with respectively a baffle plate of fixedlying connected, stretching, contracting and realize gap increase and decrease between baffle plate and nozzle by piezoelectric stack with piezoelectric stack in the corresponding nozzle outlet port.
The present invention utilizes piezoelectric element (piezoelectric stack) to form the first order amplifier of servovalve: Nozzle flapper valve.Adopt two piezoelectric stacks directly to realize the yaw motion of baffle plate: the baffle plate that is fixed in two piezoelectric stack end faces is relative with two nozzles respectively, piezoelectric stack is applied voltage signal it is elongated or shortened, thereby the distance of the relative nozzle of baffle plate is changed.By coordinating the fore and aft motion of two piezoelectric stacks, can realize the proper functioning of Nozzle flapper valve.
The present invention's structure, baffle plate flexible movements, reliable, the ring that stagnates obviously reduces, and speed of response is fast, compact structure.
Description of drawings
Fig. 1 is a servovalve structural representation of the present invention;
Embodiment
Below the embodiment that provides with regard to accompanying drawing structure of the present invention is described in further detail.
With reference to Fig. 1: a kind of novel nozzle baffle type servovalve, constitute by nozzle 2,7 and guiding valve 11, the screen pipe 10 that are arranged in pedestal 5 and the valve body 9 by liquid paths system connectivity, one baffle plate 3,14 of fixedlying connected with piezoelectric stack 4,12 is set, stretching, contracting and realize gap increase and decrease between baffle plate and nozzle respectively by piezoelectric stack in corresponding nozzle 2,7 outlet ports.
When piezoelectric stack imposes positive voltage signal, the piezoelectric stack elongation, at this moment the gap between baffle plate and nozzle reduces; Otherwise when piezoelectric stack imposed negative voltage signal, piezoelectric stack shortened, and the gap between baffle plate and nozzle increases.
Baffle plate 3.14 is relative with nozzle 2,7 respectively, and when piezoelectric stack 4 imposes positive voltage signal elongation and during piezoelectric stack 12 no electric circuits, the back pressure in chamber, a servovalve left side is higher than right chamber, thereby promoting secondary guiding valve 11 moves right; Otherwise, when piezoelectric stack 12 imposes positive voltage signal elongation and during piezoelectric stack 4 no electric circuits, the back pressure in the right chamber of servovalve is higher than left chamber, thereby promotes the secondary guiding valve to left movement.When the piezoelectric stack one applies positive voltage signal elongation and another piezoelectric stack applies negative voltage signal and when shortening, distance between scalable nozzle flapper, and then the back pressure of secondary guiding valve is amplified, and the final displacement that realizes increasing the secondary guiding valve, thereby flow or pressure control formed.
Baffle plate deflection is to finish by the relative deformation of controlling two piezoelectric stacks, thus can improve the actual speed of deformation of baffle plate greatly, thus effectively reduce the ring that stagnates.
Because the amount of deformation of piezoelectric stack is directly proportional with the voltage signal of input, and the resolution of piezoelectric stack is very high, so by can realize effective control to the suitable voltage signal of piezoelectric stack input to Nozzle flapper valve.
Claims (4)
1. novel nozzle baffle type servovalve, constitute by the nozzle by liquid paths system connectivity (2), (7) and the guiding valve (11), the screen pipe (10) that are arranged in pedestal (5) and the valve body (9), it is characterized in that being provided with respectively baffle plate (3), (14) of fixedlying connected, stretching, contracting and realize gap increase and decrease between baffle plate and nozzle by piezoelectric stack with piezoelectric stack (4), (12) in corresponding nozzle (2), (7) outlet port.
2. a kind of novel nozzle baffle type servovalve according to claim 1 is characterized in that described nozzle (2), (7) are fixed in the pedestal (5) by lock screw (1), (8) of afterbody respectively, and can adjust its axial position.
3. a kind of novel nozzle baffle type servovalve according to claim 1 is characterized in that the tail end of described piezoelectric stack (4), (12) is fixed in the pedestal (5), and can adjusts its axial position by adjustment screw (6), (13) respectively.
4. a kind of novel nozzle baffle type servovalve according to claim 1 is characterized in that having anti-bakie on described baffle plate (3), (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03111075 CN1434218A (en) | 2003-02-25 | 2003-02-25 | Novel nozzle baffle-plate type servo valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03111075 CN1434218A (en) | 2003-02-25 | 2003-02-25 | Novel nozzle baffle-plate type servo valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1434218A true CN1434218A (en) | 2003-08-06 |
Family
ID=27634113
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03111075 Pending CN1434218A (en) | 2003-02-25 | 2003-02-25 | Novel nozzle baffle-plate type servo valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1434218A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100441887C (en) * | 2006-10-30 | 2008-12-10 | 华中科技大学 | Hydraulic pressure servo valve |
| CN101452295A (en) * | 2007-12-05 | 2009-06-10 | Abb股份公司 | Method for operation of a position regulator |
| CN102343900A (en) * | 2010-07-28 | 2012-02-08 | 罗伯特·博世有限公司 | Brake device with active brake force limit and double-wheel vehicle equipped therewith |
| CN106224598A (en) * | 2016-08-31 | 2016-12-14 | 渤海阀门集团有限公司 | Operated pneumatic valve |
| CN106704306A (en) * | 2017-03-24 | 2017-05-24 | 中冶华天工程技术有限公司 | Device and method for suppressing self-excited oscillation of servo valve by adjustable nozzle-baffle distance |
-
2003
- 2003-02-25 CN CN 03111075 patent/CN1434218A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100441887C (en) * | 2006-10-30 | 2008-12-10 | 华中科技大学 | Hydraulic pressure servo valve |
| CN101452295A (en) * | 2007-12-05 | 2009-06-10 | Abb股份公司 | Method for operation of a position regulator |
| CN102343900A (en) * | 2010-07-28 | 2012-02-08 | 罗伯特·博世有限公司 | Brake device with active brake force limit and double-wheel vehicle equipped therewith |
| CN106224598A (en) * | 2016-08-31 | 2016-12-14 | 渤海阀门集团有限公司 | Operated pneumatic valve |
| CN106224598B (en) * | 2016-08-31 | 2018-10-26 | 渤海阀门集团有限公司 | Operated pneumatic valve |
| CN106704306A (en) * | 2017-03-24 | 2017-05-24 | 中冶华天工程技术有限公司 | Device and method for suppressing self-excited oscillation of servo valve by adjustable nozzle-baffle distance |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| AD01 | Patent right deemed abandoned | ||
| C20 | Patent right or utility model deemed to be abandoned or is abandoned |