CN106895038A - A kind of servo valve - Google Patents
A kind of servo valve Download PDFInfo
- Publication number
- CN106895038A CN106895038A CN201510957307.5A CN201510957307A CN106895038A CN 106895038 A CN106895038 A CN 106895038A CN 201510957307 A CN201510957307 A CN 201510957307A CN 106895038 A CN106895038 A CN 106895038A
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- CN
- China
- Prior art keywords
- press section
- room
- valve body
- valve
- nozzle
- 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
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/04—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor
- F15B13/042—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure
- F15B13/043—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves
- F15B13/0438—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors for use with a single servomotor operated by fluid pressure with electrically-controlled pilot valves the pilot valves being of the nozzle-flapper type
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Servomotors (AREA)
Abstract
The invention provides a kind of servo valve, structure includes：The guiding valve that can reciprocally install, the first Room pressed to mutual rightabout using fluid pressure handle guiding valve and second Room, to the first Room and second Room supply oil and adjust the pressure of the oily cutting plate for being supplied, and make the reciprocating spool actuation loop of guiding valve, wherein, the fluid pressure of the first Room is maintained substantially certain size by spool actuation loop, and has the nozzle-baffle mechanism of regulation second Room fluid pressure in the oil export portion of second Room.The present invention makes the relative position adjustment of nozzle and baffle plate simple, and makes simplifying the structure and can effectively reducing manufacturing cost for valve body driving circuit.
Description
Technical field
The invention belongs to Hydraulic Elements field, more particularly, to a kind of servo valve.
Background technology
Hydraulic control servo valve can be after electric simulation signal be received, the flow and oil pressure of corresponding output modulation.It is both electro-hydraulic converting element, is also power amplification element, and low power faint electrical input signal can be converted to powerful hydraulic energy (flow and oil pressure) output by it.In electrohydraulic servo system, it couples together electric part with hydraulic part, and the conversion and hydraulic pressure for realizing electro-hydraulic signal are amplified.Electrohydraulic servo valve is the core of electrohydraulic servo system control.
It is using a pair of nozzles and is arranged on the baffle plate between two nozzle and forms variable orifices, and the back pressure of two nozzles of change is derived according to the position of baffle plate, using the pressure differential of the derived back pressure acts guiding valve.
But when the baffle plate using a pair of nozzles and between being arranged on two nozzles is to form variable orifices, in order to the operation precision for improving guiding valve be accomplished by baffle plate be respectively installed to respect to two nozzles just on attitude or give the attitude of uniform influence.Therefore, there is the difficult problem of the position adjustment of the baffle plate in every installation.And the distance of the correct mobile control to both sides is needed due to baffle plate, so must just use big laminate-type piezoelectric element in the case of using laminate-type piezoelectric element.Therefore, servo valve can be forced to maximize, makes to increase difficulty to the control of baffle plate movement.
The content of the invention
It is an object of the invention to：In view of the shortcomings of the prior art, a kind of servo valve is provided, makes the relative position adjustment of nozzle and baffle plate simple, and make simplifying the structure and can effectively reducing manufacturing cost for valve body driving circuit.
To achieve these goals, the present invention is adopted the following technical scheme that：
That is, a kind of servo valve arrangement of the invention includes：Valve body, it can reciprocally be installed；First press section and the second press section, it utilizes the fluid pressure handle valve body to be pressed to mutual rightabout；Valve body driving circuit, it is to the described first pressing
Portion and second press section supply fluid and adjust the pressure of supplied fluid and move back and forth the valve body, wherein, institute
State valve body driving circuit and the fluid pressure of first press section is maintained consistent size, and there is the nozzle-baffle mechanism of the fluid pressure of regulation second press section in the fluid issuing portion of second press section.
Due to can reciprocating valve body pressed in the opposite direction by the fluid pressure of the first press section and the second press section, so being moved back and forth using the pressure difference of the first press section and the second press section fluid pressure.That is, in the fluid pressure of the first press section and the second press section, valve body presses the fluid of big press section to press acted on direction to move to fluid.
According to this structure, due to the fluid pressure of the first press section is maintained consistent size, so by the fluid pressure of the second press section being adjusted to press big than the fluid of the first press section or small just moving back and forth valve body.
Because the fluid issuing portion in the second press section has nozzle-baffle mechanism, so the distance between front end and baffle plate of the nozzle in fluid issuing portion are arranged on by adjustment can just adjust the Fluid pressure of the second press section.Because the Fluid pressure that can adjust the second press section can just adjust the fluid pressure of the second press section, it is possible to making the fluid of the second press section press the fluid pressure of the first certain press section of relative size and become big or diminish.
So, due to only nozzle-baffle mechanism being arranged on the export department of the second press section, i.e. baffle plate is engaged with a nozzle, it is possible to the easier position adjustment for carrying out baffle plate relative nozzle.Thereby, it is possible to correct and easily carry out the setting of baffle plate.
Because the loop structure of valve body driving circuit is simple, it is possible to reducing the production cost of valve body.
In said structure, the baffle plate of the nozzle-baffle mechanism can also utilize bimorph type piezoelectric element.Due to using displacement than the bimorph type piezoelectric element that larger and low-voltage can just drive, so power unit can promote nozzle-baffle mechanism to minimize.Servo valve can be more at low cost manufactured along with the low cost of bimorph type piezoelectric element.
In said structure, the baffle plate of the nozzle-baffle mechanism can also be acted using laminate-type piezoelectric element.Distance is adjusted because baffle plate is a relative nozzle, so using the single laminate-type piezoelectric element for moving it just can be with.Therefore, it is more compact with the structure compared for possessing big laminate-type piezoelectric element respectively in baffle plate both sides so that servo valve is minimized.And make the control also relative ease of the control system that baffle plate moves.
In above-mentioned form, the baffle plate of the nozzle-baffle mechanism can also be acted using torque electric notor.The servo valve for carrying out stablizing adjustment can be constituted by using the torque motor for having stabilization.
Brief description of the drawings
With reference to specification drawings and specific embodiments, the present invention and its Advantageous Effects are described in detail, wherein：
Fig. 1 is driving circuit figure of the invention.
Wherein 1- servo valves, 5- guiding valves, the rooms of 7- first (the first press section), 9- second Rooms (the second press section), 11- pumps, the paths of 13- first, 15- alternate paths, 17- fuel tanks, 19- pipe arrangements, 21- first throttle valves, 23- pressure regulation choke valves, 25- second throttle, 27- nozzle-flapper structures.
Specific embodiment
It is elucidated further below the present invention, it should be understood that following specific embodiments are only illustrative of the invention and is not intended to limit the scope of the invention, after the present invention has been read, modification of the those skilled in the art to the various equivalent form of values of the invention falls within the application appended claims limited range.
In servo valve 1, guiding valve 5 can be moved in the axial direction.Guiding valve 5 has the function in switching fuel feeding direction by its position in axis direction.Guiding valve 5 is detected in the position of axis direction by position detector (not shown).It is the first room (the first press section) 7 and second Room (the second press section) 9 to have the space opened wide to the both sides of guiding valve 5 at the both ends of guiding valve 5.Spool actuation loop 3 has the pump 11 of fuel feeding.Oil from pump 11 diverges in the first path 13 and alternate path 15.Supplied to the first Room 7 by the oil of the first path 13 and return to fuel tank 17.Discharged to pipe arrangement 19 after the oil of alternate path 15 is supplied to second Room 9.The oil discharged to pipe arrangement 19 returns to fuel tank 17.
Same area is about by the compression area of the guiding valve 5 of the oil effect of the first Room 7 and second Room 9.The pressure difference of fluid pressure and the pressure difference of hydraulic coupling that the oil of the first Room 7 and second Room 9 is acted on to guiding valve 5 are direct ratios.First path 13 has first throttle valve 21 in the upstream side of the first Room 7, has pressure regulation choke valve 23 in the downstream of the first Room 7.First throttle valve 21 is aperture, it is stipulated that to the oily pressure that the first Room 7 supplies.The pressure supplied to the first Room 7 is the substantially half of the oily pressure pumped out from pump 11.The variable open area of pressure regulation choke valve 23, adjusts the size of the hydraulic coupling of the first Room 7.Alternate path 15 has second throttle 25 in the upstream side of second Room 9, has nozzle-flapper structure 27 in downstream.Second throttle 25 is aperture, and its aperture area is same size with first throttle valve 21.
Claims (6)
1. a kind of servo valve, structure includes：Valve body, it can reciprocally be installed；First press section and the second press section, it utilizes the fluid pressure handle valve body to be pressed to mutual rightabout；Valve body driving circuit, it moves back and forth the valve body to the pressure of first press section and second press section supply fluid and the supplied fluid of regulation, wherein, the fluid pressure of first press section is maintained substantially certain size by the valve body driving circuit, and has the nozzle-baffle mechanism of the fluid pressure of regulation second press section in the fluid issuing portion of second press section.
2. the servo valve as described in claim 1, wherein, the first compression area and the fluid of second press section that the fluid of first press section of the valve body is acted on to the valve body are set to equal area to the second compression area that the valve body is acted on.
3. the servo valve as described in claim 1, wherein, the valve body uses carbon steel material, and needs heat treatment.
4. such as claim 1 to the servo valve as described in any one of claim 3, wherein, the baffle plate of the nozzle-baffle mechanism is acted using bimorph type piezoelectric element.
5. such as claim 1 to the servo valve as described in any one of claim 3, wherein, the baffle plate of the nozzle-baffle mechanism is acted using laminate-type piezoelectric element.
6. such as claim 1 to the servo valve as described in any one of claim 3, wherein, the baffle plate of the nozzle-baffle mechanism is acted using torque motor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510957307.5A CN106895038A (en) | 2015-12-21 | 2015-12-21 | A kind of servo valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510957307.5A CN106895038A (en) | 2015-12-21 | 2015-12-21 | A kind of servo valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106895038A true CN106895038A (en) | 2017-06-27 |
Family
ID=59189528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510957307.5A Pending CN106895038A (en) | 2015-12-21 | 2015-12-21 | A kind of servo valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106895038A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805583A (en) * | 2019-10-15 | 2020-02-18 | 南京航空航天大学 | Piezoelectric sheet driven nozzle blocking disc pressure servo valve with main valve core hydraulic compensation |
-
2015
- 2015-12-21 CN CN201510957307.5A patent/CN106895038A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805583A (en) * | 2019-10-15 | 2020-02-18 | 南京航空航天大学 | Piezoelectric sheet driven nozzle blocking disc pressure servo valve with main valve core hydraulic compensation |
| CN110805583B (en) * | 2019-10-15 | 2021-07-09 | 南京航空航天大学 | Piezoelectric sheet driven nozzle blocking disc pressure servo valve with main valve core hydraulic compensation |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170627 |
|
| WD01 | Invention patent application deemed withdrawn after publication |