CN2612829Y - Novel nozzle flapper type servo valve - Google Patents
Novel nozzle flapper type servo valve Download PDFInfo
- Publication number
- CN2612829Y CN2612829Y CN 03211566 CN03211566U CN2612829Y CN 2612829 Y CN2612829 Y CN 2612829Y CN 03211566 CN03211566 CN 03211566 CN 03211566 U CN03211566 U CN 03211566U CN 2612829 Y CN2612829 Y CN 2612829Y
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- CN
- China
- Prior art keywords
- nozzle
- piezoelectric stack
- baffle
- baffle plate
- novel
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- Expired - Fee Related
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Abstract
The utility model relates to an improved electro hydraulic servo valve, which aims at solving the disadvantages of big hysteresis and small structural stiffness of a baffle and the like existing in prior electro hydraulic servo valves, and provides a novel jet nozzle baffle type servo valve, which comprises a jet nozzle 2,7, a slide valve 11 and a filter tube 10 which are communicated through a fluid path channel system and arranged in a base 5 and a valve body 9, and is characterized in that a baffle 3,14 fixedly connected with a piezoelectric stack 4,12 is arranged on an outlet which is corresponding to the jet nozzle 2,7, and increasing or decreasing of a gap between the baffle and the jet nozzle is achieved through expansion of the piezoelectric stack.
Description
Technical field
The utility model 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 purpose of this utility model is for solving shortcomings such as the big ring that stagnates, baffle arrangement rigidity that present electrohydraulic control exists are little, a kind of novel nozzle baffle type servovalve being provided.
The utility model nozzle baffle type servovalve, 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 utility model 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 structure of the utility model, 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 the utility model servovalve structural representation;
Embodiment
Below the embodiment that provides with regard to accompanying drawing the utility model structure 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 03211566 CN2612829Y (en) | 2003-02-25 | 2003-02-25 | Novel nozzle flapper type servo valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03211566 CN2612829Y (en) | 2003-02-25 | 2003-02-25 | Novel nozzle flapper type servo valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2612829Y true CN2612829Y (en) | 2004-04-21 |
Family
ID=34159057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03211566 Expired - Fee Related CN2612829Y (en) | 2003-02-25 | 2003-02-25 | Novel nozzle flapper type servo valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2612829Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410269A (en) * | 2011-08-11 | 2012-04-11 | 西安航空制动科技有限公司 | Method for determining bore diameter of throttling pillar of hydraulic servo valve of aircraft and clearances between nozzles and baffles |
| EP3502486A1 (en) * | 2017-12-22 | 2019-06-26 | Hamilton Sundstrand Corporation | Servo valve |
| EP3587831A1 (en) * | 2018-06-25 | 2020-01-01 | Microtecnica S.r.l. | Hydraulic stage |
-
2003
- 2003-02-25 CN CN 03211566 patent/CN2612829Y/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102410269A (en) * | 2011-08-11 | 2012-04-11 | 西安航空制动科技有限公司 | Method for determining bore diameter of throttling pillar of hydraulic servo valve of aircraft and clearances between nozzles and baffles |
| EP3502486A1 (en) * | 2017-12-22 | 2019-06-26 | Hamilton Sundstrand Corporation | Servo valve |
| US20190195381A1 (en) * | 2017-12-22 | 2019-06-27 | Hamilton Sundstrand Corporation | Servo valve |
| US10767778B2 (en) | 2017-12-22 | 2020-09-08 | Hamilton Sunstrand Corporation | Servo valve |
| EP3587831A1 (en) * | 2018-06-25 | 2020-01-01 | Microtecnica S.r.l. | Hydraulic stage |
| US11193510B2 (en) | 2018-06-25 | 2021-12-07 | Microtecnica S.R.L. | Hydraulic stage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |