CN108506257A - A kind of threeway jet pipe servo valve jet axis track debugging apparatus and method - Google Patents
A kind of threeway jet pipe servo valve jet axis track debugging apparatus and method Download PDFInfo
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- CN108506257A CN108506257A CN201810123205.7A CN201810123205A CN108506257A CN 108506257 A CN108506257 A CN 108506257A CN 201810123205 A CN201810123205 A CN 201810123205A CN 108506257 A CN108506257 A CN 108506257A
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Classifications
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- 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
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- 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
- F15B19/00—Testing; Calibrating; Fault detection or monitoring; Simulation or modelling of fluid-pressure systems or apparatus not otherwise provided for
- F15B19/002—Calibrating
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Abstract
The present invention relates to a kind of threeway jet pipe servo valve jet axis track debugging apparatus and method, which includes valve body, the jet stream receiver of jet area is arranged on valve body, is arranged with jet area face and by the jet nozzle of torque-motor command displacement and the pressure sensor being connect with jet nozzle by detection hole.Compared with prior art, the present invention has many advantages, such as that detection method is simple, and accuracy is high, efficient, with a high credibility.
Description
Technical field
The present invention relates to jet pipe servo valve technical fields, more particularly, to a kind of threeway jet pipe servo valve jet axis
Track debugging apparatus and method.
Background technology
Jet pipe servo valve occurs during World War II earliest, and German Askania companies have invented first penetrates
Flow tube servo valve.Jet action valve has the function of that failure safe has been widely used in the liquid of civilian military aviation space equipment because of it
In pressure system.Nineteen fifty-seven R.Atchley is in Askania (referenced patent documents：R.D.Atchley.Servo-mechanism:
US2884907A [P] .1957-8-30) basis on invented two stage jet pipe servo valve.Gerald C.Zoller (ginsengs
Examine patent document：Gerald C.Zoller.Variable gain jet pipe servo vavle:US3589238A[P]
.1969-2-24) position is mounted with one movably between fixed nozzle and receiver hole in jet pipe servo valve prestage
Circular ring shape jet stream guidance cavity restores pressure by changing the relative position between guidance cavity and nozzle, receiver hole to reach to adjust
The purpose of power.Clyde E.Cobb (referenced patent documents in 1971：Clyde E Cobb,Charles E
jones.Adjustable receiver port construction for jet pipe servovavle:
US3584638A [P] .1971-6-15) et al. invented receiver hole adjustable jet pipe servo valve, two receptions of prestage
Hole is set up directly on main valve plug, and the position of two receiver hole relative nozzles can be adjusted by the radiai adjustment of main valve plug,
Restore pressure to play the role of adjusting receiver hole.Richard D.Bartholomew (referenced patent documents in 1987：
Richard D.Bartholomew.Optical feedback loop system for a hydraulic
servovalve:US4660589A [P] .1986-3-3) use electromagnetic positioners to replace traditional hydraulic control and automatically controlled locator, this
Kind feedback system is more accurate than machine feedback.In various adjusting receiver holes restore the method for pressure, core is to adjust nozzle
With the relative position of receiver hole, movement locus of the nozzle under torque-motor driving is set to change, so that injection stream
The flow flowed into receiver hole generates variation, then achievees the purpose that adjust and restores pressure.Since the working environment of servo valve is multiple
It is miscellaneous, it is easy to be affected by various factors during the work time, lead to the offset of nozzle location, and then jet axis track occur
Variation, and it is this change bring influence often it is unfavorable.So one kind can adjust Jet Axis according to people's wish
The it is proposed of the method for line tracking is necessary.
Since threeway jet pipe servo valve works in enclosure space, jet axis track can not directly be detected.Currently, people
Adjust jet axis track method be all based on experience, intuition, feel etc. greatly, such method lacks professional and not straight
It sees.
Invention content
It is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of threeway jet pipes to watch
Take valve jet axis track debugging apparatus and method.
The purpose of the present invention can be achieved through the following technical solutions：
A kind of threeway jet pipe servo valve jet axis track debugging apparatus, the device include valve body, are arranged on valve body
The jet stream receiver of jet area with the setting of jet area face and passes through the jet nozzle of torque-motor command displacement and logical
Cross the pressure sensor that detection hole is connect with jet nozzle.
Preferably, the jet stream receiver is rounding pillar base type, and lower part is fixed in jet area, and top is sprayed with jet stream
Mouth is oppositely arranged, and is respectively equipped with jet stream receiver hole, upper pressure sensing port and lower pressure sensing port, the jet stream on end face thereon
Receiver hole is connected to the reception slot hole in setting valve body, and upper pressure sensing port and lower pressure sensing port pass through right detection slot hole respectively
It is connect with pressure difference value sensor with left detection slot hole.
Preferably, the jet stream receiver hole be one perpendicular to jet stream receiver upper surface straight hole, the upper pressure
Detection hole and lower pressure sensing port are inclined hole, and are symmetrical arranged in space splayed, to prevent pressure sensing port from being connect with jet stream
Batter interferes, and angle is the axis of jet stream receiver hole between upper pressure sensing port and the axis of lower pressure sensing port respectively
15 °~35 °, preferably 30 °.
Preferably, the perpendicular bisector of the circle center line connecting of the upper pressure sensing port and lower pressure sensing port is received by jet stream
The center of circle in hole.
Preferably, the radius R ' of the upper pressure sensing port and lower pressure sensing port is that jet stream receives the one of pore radius R
Half.
Preferably, the distance of center circle of the upper pressure sensing port and lower pressure sensing port is R '+0.02mm.
A kind of adjustment method, includes the following steps：
1) pressure difference value sensor is connected in valve body both sides, places jet nozzle in initial position, opens driving moment
Motor makes jet nozzle complete the moving process from initial position to terminal point under the action of torque-motor；
2) in jet nozzle moving process, the pressure difference value of pressure at both sides detection hole is obtained, is penetrated according to pressure difference judgement
Whether stream axis line track meets the requirements；
3) it when jet axis track meets the requirements, i.e., with x-axis coincidence or desired value that is parallel and being apart setting, unloads
Pressure difference value sensor closes detection slot hole using sealing screw, completes the debugging of jet axis track；
4) when jet axis track is undesirable, nozzle mounting position, and return to step 1 are readjusted).
In the step 2)：
When it is zero that the difference of the pressure value of pressure at both sides sensor is constant, then jet axis track is overlapped with x-axis, judgement symbol
It closes and requires；
When the pressure value of pressure at both sides sensor is not zero and constant pressure differential is a nonzero value, then jet axis track
It is parallel with x-axis, and be apart certain value, judgement meets the requirements；
When the random variation of the difference of the pressure value of pressure at both sides sensor, then jet axis track is not parallel with x-axis, sentences
It is fixed undesirable.
The x-axis is the perpendicular bisector of the circle center line connecting of upper pressure sensing port and lower pressure sensing port.
The center of circle of the upper pressure sensing port and lower pressure sensing port is respectively positioned on the regions of turbulent flow under initial jets state
In the annular section formed with the constant speed nucleus under initial jets state.
Compared with prior art, the present invention has the following advantages：
1, the present invention records the pressure difference of two pressure sensing ports using pressure difference value sensor, and measurement process is more just
It is prompt.
2, the present invention can judge threeway jet servo valve jet axis track according to the pressure difference value detected, compare
Rule of thumb, traditional judgment method such as intuition, feel is more intuitive, confidence level higher.
3, detection sensitivity is high, accuracy is good, and to be adapted to logical jet servo valve, jet stream receiver of the invention is in center
A jet stream receiver hole is opened up, effectively avoiding can be limited when opening up two pressure sensing ports by more positions, cause
Receiving limited flow, sensitivity is not high, and since only there are one jet stream receiver holes in three-way servo valve, so can more freely set
Set the position of two pressure sensing ports, detection sensitivity higher.
4, detection method is simple, efficient.
Description of the drawings
Fig. 1 is a kind of jet pipe type electro-hydraulic servo structure of relief pressure valve schematic diagram of embodiment of the present invention.
Fig. 2 is a kind of free injection stream flow field geometrical relationship figure of embodiment of the present invention.
Fig. 3 is a kind of receiver floor map of embodiment of the present invention.
Fig. 4 is a kind of receiver schematic three dimensional views of embodiment of the present invention.
Fig. 5 is four kinds of different situations of jet axis track in the embodiment of the present invention.
Fig. 6 is the pressure trend under four kinds of different situations corresponding to pressure sensing port in the embodiment of the present invention,
In, the pressure trend in the case of figure (6a) is a corresponding to pressure sensing port, figure (6b) is pressure sensing port institute in the case of b
Corresponding pressure trend, the pressure trend in the case of figure (6c) is c corresponding to pressure sensing port, figure (6d) are d feelings
Pressure trend under condition corresponding to pressure sensing port.
Fig. 7 is the pressure difference variation under four kinds of different situations corresponding to two-way pressure detection hole in the embodiment of the present invention,
In, the pressure difference variation in the case of figure (7a) is a corresponding to two-way pressure detection hole, two-way pressure detects in the case of figure (7b) is b
Pressure difference variation corresponding to hole, the pressure difference variation in the case of figure (7c) is c corresponding to two-way pressure detection hole, figure (7d) is d feelings
Pressure difference variation under condition corresponding to two-way pressure detection hole.
Description of symbols in figure：
1, valve body, 2, spool, 3, spring, 4, pressure difference value sensor, 5, right detection slot hole, 5 ', left detection slot hole, 6, first
Lead back to hydraulic fluid port, 7, jet stream receiver hole, 8, upper pressure sensing port, 8 ', lower pressure sensing port, 9, the turbulent region under initial jets state
Domain, 10, the constant speed nucleus under initial jets state, 11, the constant speed nucleus at jet beam exercise end, 12, jet stream
Regions of turbulent flow at beam exercise end, 13, torque-motor, 14, flexible fuel feed pump, 15, jet nozzle, 16, jet stream receiver,
17, receive slot hole, P, oil-feed port, C, control port, T, oil return opening, O, coordinate origin, O1, constant speed core under initial jets state
The round heart in area section, P1, the upper round heart in pressure sensing port section, P2, the lower round heart in pressure sensing port section, Δ, valve port opening.
Specific implementation mode
The present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings.
Embodiment
As shown in Figure 1, the jet pipe type electro-hydraulic servo pressure reducing valve of the present invention is by valve body 1, spool 2, spring 3, torque-motor
13, flexible fuel feed pump 14, jet nozzle 15, jet stream receiver 16 form, jet stream receiver hole 7 and spool on jet stream receiver 16
Right chamber is connected, when jet pipe type servo pressure reducing valve input control electric current is zero, 13 attonity of torque-motor, as shown in figure 3, this
When to be projected in jet stream a fluid stream turbulent region on jet stream receiver 13 be that section justifies 9, constant speed core space is that section justifies 10, and the center of circle is
O1, and turbulent region section circle 9 is tangent with the outer circle of jet stream receiver hole 7, the energy that receiver hole 7 receives is zero, and spool is in left side bullet
Right positions are under the action of spring.After applying control electric current, under the driving of torque-motor 13, jet nozzle 15 is to left avertence
It moves, the jet energy that the receiver hole 7 on jet stream receiver 16 receives gradually increases, and gradually increases in the pressure that spool right end generates
Greatly.Due to spool left end power under spring action, when the pressure in receiver hole is more than spring force, spool 2 is moved to left end
Dynamic, valve port opening Δ increases, and a part of pressure oil entered from oil-feed port P is connected by the valve port of unlatching with control port C,
2 left side of spool is entered eventually into, feedback effect is played, avoids 2 immediate movement problems of too of spool.When 2 pressure at two ends of spool
It is equal to form new dynamic balance back valve core stabilization in a certain operating position.At this point, the offset of main valve plug 2 with control electric current at than
Example.Jet pipe 15 is farthest moveable to right over jet stream receiver hole 7, and the jet stream a fluid stream being projected at this time on jet stream receiver 16 is disorderly
It is that section justifies 12 to flow area, and constant speed core space is that section justifies 11, which justifies 12 centers of circle and received with jet stream
7 center of circle of hole overlaps, as coordinate origin O, which is the terminal of jet axis track, the energy that jet pipe receiver hole 7 receives at this time
Amount reaches maximum value.
As shown in Fig. 2, jet stream fluid injects static fluid of the same race through jet nozzle 15, connect in jet stream with hole surface is received
Before touching, it is believed that jet stream is not hit the influence on surface, therefore is equivalent to the stationary fluid for having injected an infinite space, for freely
Flood turbulent jet, a fluid stream is in figure shown in dotted line, including constant speed core space and turbulent region, wherein constant speed core space jet velocity
Degree is v0, turbulent region effluxvelocity is v.Jet nozzle 15 and 7 diameter of receiver hole are D=2R in this example, and nozzle 15 exports
Distance away from 16 plane of receiver is generally L ≈ (1~1.4) D.According to Zalmanzon and Semikova to incompressible turbulent flow
Injection scope in propose pressure distribution precise figures description, when jet stream jet angle α=14 °, constant speed core space angle
The length of γ=11 ° 26', constant speed core space are 5D.Distance of the jet nozzle 15 away from jet stream receiver plane takes L in the present embodiment
=1.2D is obtained by the geometrical relationship in figure：
Constant speed core space a fluid stream diameter
Shear layer a fluid stream diameter
As shown in figure 3, two pressure sensing ports 8,8 ' on jet stream receiver are located at jet stream receiver hole both sides, jet stream
The center of receiver hole 7 is located on the perpendicular bisector of the line of centres P1P2 of two pressure sensing ports 8,8 ', and R is the half of jet stream receiver hole
Diameter is pressure detecting pore radius.When installation, front and back 15 position of adjustment jet nozzle on P1P2 perpendicular bisectors direction, makes as required
Detection aperture 8,8 ' place's pressure difference values and its variation meet expection.When requiring jet axis to be overlapped with x-axis, upper and lower detection hole 8,
The pressure difference value Ying Heng that 8 ' places are detected is zero；When requiring jet axis parallel with x-axis and at a distance of certain certain value, examine up and down
Survey aperture 8, the pressure difference value at 8 ' places should be a non-zero definite value in certain section.When detecting the pressure at two detection apertures
When the random variation of difference, illustrates that jet axis track and x-axis are not parallel, generally can determine that be nonconforming, then need to continue to adjust
The position of whole jet nozzle 15.Detection aperture 8,8 ' is symmetrically opened in 7 both sides of jet stream receiver hole up and down, it is assumed that detects aperture in top
8 coordinate in figure is (x, y), to ensure that detection aperture can receive jet pipe energy to greatest extent in jet pipe swing process
Detection aperture is positioned close at initial jets, and is in as possible at its constant speed core space by amount herein.Then closed by diagram geometry
Be
Aperture will be detected to be positioned close to ensure that the identification that detection hole receives pressure at initial jets, in order to make jet stream
Still there is certain detection pressure when pipe moves to final position, and two detection holes 8,8 ' do not interfere with jet stream receiver hole 7,
Then had according to diagram geometrical relationship：
Simultaneously to ensure that raising its output pressure that detection aperture 8 can be big as possible when position is certain, detection hole 8,8 ' are answered
The jet beam of more reception constant speed core spaces and shear layer as possible, therefore detection hole should be in region between circle 9 and circle 10 as possible,
Its radius then can be obtained by diagram geometrical relationship：
Take detection aperture radius R'=0.5R.According to existing processing technology, it is ensured that the entity between two adjacent processing holes
Distance reaches a millimeter class precision, which takes the physical distance between the top edge of the lower edge of detection aperture 8, detection aperture 8 '
For 0.02mm, i.e. the top edge of the lower edge of detection aperture 8, detection aperture 8 ' is 0.01mm away from x-axis distance.Detect aperture 9
Y-coordinate value i.e. obtained determination, y=0.5R+0.01.According to the above known conditions, inequality (2) can turn to：
Considered inequality (1), (2), (3) restrictive condition, take in this exampleFinal
Coordinate to two detection apertures 8,8 ' is respectively (1.6R, 0.5R+0.01), (1.6R, -0.5R-0.01).Two detection apertures 8,8 '
It is symmetrical about x-axis.
As shown in figure 4, two pressure sensing ports 8,8 ' on jet stream receiver 16 are symmetrical about jet stream receiver hole 7,
It is arranged in splayed in space, in order to not interfered with jet stream receiver hole 7, reception slot hole 17, two pressure sensing ports 8,8 '
7 axis of axis and jet stream receiver hole between angular range be 15 °~35 °, it is 30 ° that angle is preferably taken in this example.Two detection apertures
Centre distance is R+0.02 (mm), and detection pore radius is R '=0.5R, and the radius of jet stream receiver hole is R.Jet stream receiver 16 is in
Inverted boss-shaped, tail portion be equipped with two symmetrical vertical sections, two pressure sensing ports by be attached thereto two detection slot holes with
Pressure difference value sensor is connected.During being passed through current driving capability square motor to drive nozzle to move, two inspection of record
The pressure difference value of gaging hole 8,8 '.When it is zero that pressure difference value is constant, illustrate that jet axis track is overlapped with x-axis；When appearing in one
In section section, constant pressure difference value is a nonzero value, illustrates that jet axis track is parallel with x-axis, and is apart certain value；Work as pressure
When force difference is worth random variation, illustrate that jet axis is not parallel with x-axis, this kind of situation of general estimation is nonconforming, need to will be penetrated
The position of flow nozzle 15 is finely adjusted, and so that it is in as possible perpendicular to y-axis and is crossed in the plane of x-axis, to ensure jet axis
Track reaches ideal situation.
It is driven and four kinds of allusion quotations in moving process by torque-motor as shown in figure 5, a, b, c, d correspond to jet nozzle 15 respectively
Type jet path situation.Wherein a is the case where jet axis track is overlapped with x-axis, and b is parallel with x-axis and is separated by a certain distance
The case where, c, d are two different jet axis tracks and the not parallel situation of x-axis.These four different jet axis at this
In track, a, b are satisfactory jet axis track, and c, d are undesirable jet axis track.
Fig. 6 is the pressure change under tetra- kinds of different situations of a, b, c, d corresponding to pressure sensing port in the embodiment of the present invention
Trend.As described above, a is the case where jet axis track is overlapped with x-axis, in this case, pressure sensing port 8 and 8 ' has complete one
The pressure trend of cause.B is parallel with x-axis and the case where is separated by a certain distance, and the pressure value of two detection holes is being not zero
In the case of have similar variation tendency.In two kinds of c, d, the pressure value that two detection pressure ports 8,8 ' measure is irregular
Variation.
Fig. 7 is pressure difference value between pressure sensing port 8 and 8 ' under tetra- kinds of different situations of a, b, c, d in the embodiment of the present invention
Variation.As described above, a is the case where jet axis track is overlapped with x-axis, in this case, being detected at two pressure sensing ports
Pressure difference value perseverance be zero.B is parallel with x-axis and the case where is separated by a certain distance, and is not zero in the pressure value of two detection holes
In the case of its difference be certain value.In two kinds of c, d, the irregular variation of pressure difference value of two pressure sensing ports.
This hair can be understood and applied the above description of the embodiments is intended to facilitate those skilled in the art
It is bright.Person skilled in the art obviously easily can make various modifications to these embodiments, and described herein
General Principle is applied in other embodiment without having to go through creative labor.Therefore, the present invention is not limited to implementations here
Example, those skilled in the art's announcement according to the present invention, the improvement made for the present invention and modification all should be the present invention's
Within protection domain.
Claims (10)
1. a kind of threeway jet pipe servo valve jet axis track debugging apparatus, which is characterized in that the device include valve body (1),
The jet stream receiver (16) of the jet area on valve body (1) is set, with the setting of jet area face and by torque-motor (13)
The jet nozzle (15) of command displacement and the pressure sensor being connect with jet nozzle (15) by detection hole.
2. a kind of threeway jet pipe servo valve jet axis track debugging apparatus according to claim 1, which is characterized in that
The jet stream receiver (16) is rounding pillar base type, and lower part is fixed in jet area, and top is opposite with jet nozzle (15)
Setting, is respectively equipped with jet stream receiver hole (7), upper pressure sensing port (8) and lower pressure sensing port (8 ') thereon on end face, described
Jet stream receiver hole (7) is connected to the reception slot hole (17) in setting valve body, upper pressure sensing port (8) and lower pressure sensing port (8 ')
It is connect respectively with pressure difference value sensor (4) by right detection slot hole (5) and left detection slot hole (5 ').
3. a kind of threeway jet pipe servo valve jet axis track debugging apparatus according to claim 2, which is characterized in that
The jet stream receiver hole (7) be one perpendicular to jet stream receiver (16) upper surface straight hole, the upper pressure sensing port (8)
Be inclined hole with lower pressure sensing port (8 '), and be symmetrical arranged in space splayed, the axis of jet stream receiver hole (7) respectively with it is upper
Angle is 15 °~35 ° between pressure sensing port (8) and the axis of lower pressure sensing port (8 ').
4. a kind of threeway jet pipe servo valve jet axis track debugging apparatus according to claim 3, which is characterized in that
The perpendicular bisector of the circle center line connecting of the upper pressure sensing port (8) and lower pressure sensing port (8 ') passes through jet stream receiver hole (7)
The center of circle.
5. a kind of threeway jet pipe servo valve jet axis track debugging apparatus according to claim 3, which is characterized in that
The radius R ' of the upper pressure sensing port (8) and lower pressure sensing port (8 ') is the half of jet stream receiver hole (7) radius R.
6. a kind of threeway jet pipe servo valve jet axis track debugging apparatus according to claim 5, which is characterized in that
The distance of center circle of the upper pressure sensing port (8) and lower pressure sensing port (8 ') is R '+0.02mm.
7. a kind of tune of application threeway jet pipe servo valve jet axis track debugging apparatus as described in claim any one of 1-6
Method for testing, which is characterized in that include the following steps：
1) pressure difference value sensor is connected in valve body both sides, places jet nozzle in initial position, opens driving moment motor,
Jet nozzle is set to complete the moving process from initial position to terminal point under the action of torque-motor；
2) in jet nozzle moving process, the pressure difference value of pressure at both sides detection hole is obtained, Jet Axis is judged according to pressure difference
Whether line tracking meets the requirements；
3) when jet axis track meets the requirements, i.e., with x-axis coincidence or desired value that is parallel and being apart setting, pressure is unloaded
Difference sensor closes detection slot hole using sealing screw, completes the debugging of jet axis track；
4) when jet axis track is undesirable, nozzle mounting position, and return to step 1 are readjusted).
8. a kind of adjustment method according to claim 7, which is characterized in that in the step 2)：
When it is zero that the difference of the pressure value of pressure at both sides sensor is constant, then jet axis track is overlapped with x-axis, and judgement conforms to
It asks；
When the pressure value of pressure at both sides sensor is not zero and constant pressure differential is a nonzero value, then jet axis track and x
Axis is parallel, and is apart certain value, and judgement meets the requirements；
When the random variation of the difference of the pressure value of pressure at both sides sensor, then jet axis track and x-axis are not parallel, and judgement is not
It meets the requirements.
9. a kind of adjustment method according to claim 7, which is characterized in that the x-axis is upper pressure sensing port under
The perpendicular bisector of the circle center line connecting of pressure sensing port.
10. a kind of adjustment method according to claim 7, which is characterized in that the upper pressure sensing port and lower pressure
The regions of turbulent flow that the center of circle of detection hole is respectively positioned under initial jets state is formed with the constant speed nucleus under initial jets state
Annular section in.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110529466A (en) * | 2019-09-02 | 2019-12-03 | 北京交通大学 | A kind of digital servo valve debugging apparatus |
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| US20060216167A1 (en) * | 2004-12-02 | 2006-09-28 | Muchlis Achmad | Methods and apparatus for splitting and directing a pressurized fluid jet within a servovalve |
| US20170241449A1 (en) * | 2016-02-19 | 2017-08-24 | Hamilton Sundstrand Corporation | Jet Pipe Arrangement For A Servo Valve |
| CN106194898A (en) * | 2016-07-08 | 2016-12-07 | 同济大学 | A kind of jet pipe servo valve nozzle and the receiver hole centering method of inspection |
| CN206268174U (en) * | 2016-10-31 | 2017-06-20 | 北京实验工厂 | A kind of local derviation jet servo valve prestage performance testing device |
| CN107131167A (en) * | 2017-03-23 | 2017-09-05 | 同济大学 | The jet pipe servo valve and adjustment method of a kind of adjustable nozzle-axis position |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110529466A (en) * | 2019-09-02 | 2019-12-03 | 北京交通大学 | A kind of digital servo valve debugging apparatus |
| CN110529466B (en) * | 2019-09-02 | 2020-11-10 | 北京交通大学 | Digital servo valve debugging device |
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