CN108153341A - For the adjusting throat opening area of compressed air experiment and the device of experimental section flow velocity - Google Patents
For the adjusting throat opening area of compressed air experiment and the device of experimental section flow velocity Download PDFInfo
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- CN108153341A CN108153341A CN201611105656.5A CN201611105656A CN108153341A CN 108153341 A CN108153341 A CN 108153341A CN 201611105656 A CN201611105656 A CN 201611105656A CN 108153341 A CN108153341 A CN 108153341A
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- 238000002474 experimental method Methods 0.000 title description 14
- 238000012360 testing method Methods 0.000 claims abstract description 147
- 238000001816 cooling Methods 0.000 claims description 9
- 230000017525 heat dissipation Effects 0.000 claims description 5
- 230000007704 transition Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 1
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- 238000013461 design Methods 0.000 description 10
- 230000033228 biological regulation Effects 0.000 description 6
- 230000004087 circulation Effects 0.000 description 4
- 238000001514 detection method Methods 0.000 description 3
- 230000033001 locomotion Effects 0.000 description 3
- 230000001276 controlling effect Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000006244 Medium Thermal Substances 0.000 description 1
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- 238000012512 characterization method Methods 0.000 description 1
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Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D13/00—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover
- G05D13/62—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover characterised by the use of electric means, e.g. use of a tachometric dynamo, use of a transducer converting an electric value into a displacement
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D13/00—Control of linear speed; Control of angular speed; Control of acceleration or deceleration, e.g. of a prime mover
- G05D13/66—Governor units providing for co-operation with control dependent upon a variable other than speed
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- Automation & Control Theory (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a kind of adjusting throat opening area for air testing and the device of test section flow velocity, including：Pipeline, motor, tapered plug and control system are adjusted, the one end for adjusting pipeline is suitable for connecting with the test section of air testing, and the internal face for adjusting the other end of pipeline is equipped with along the annular stop portion of its circumferentially extending；Motor, which is located at, to be adjusted in pipeline, and motor has along the telescopic push rod of axial direction for adjusting pipeline；Tapered plug is located at one end of push rod and adjacent rings stopper section, and the gas channel limited between the conical surface of tapered plug and annular stop portion is formed as throat, the air velocity of the movable area control test section with by adjusting throat of axial direction of tapered plug along access；Control system is connected to control motor operation with motor.It is according to the present invention accurately to adjust the air-flow velocity of test section for the adjusting throat opening area of air testing and the device of test section flow velocity, improve the validity and reliability of test data.
Description
Technical field
The present invention relates to nuclear power plant's experimental study field more particularly to a kind of adjusting throat faces for compressed air experiment
The device of product and experimental section flow velocity.
Background technology
Prior art scenario is the thermal hydraulic test flow velocity control system generally use flow control valve that air is working medium
Realize the control to flow or flow velocity, pressure regulator valve realizes the control to pressure.Under different operating condition of test, regulating valve is to flow
Adjusting and test section pressure correlation, i.e. flow and pressure interfere with each other, and test section flow velocity can generate fluctuation, degree of regulation, can
Row and operability need to be further improved.
Invention content
The present invention is directed to solve one of above-mentioned technical problem at least to a certain extent.
For this purpose, an object of the present invention is to provide a kind of for the adjusting throat opening area of air testing and examination
The device of section flow velocity is tested, described device can be used in accurately controlling examination of the air of gas flow rate for the thermal hydraulic test of working medium
Test section so that the ideal value of the flow control of compressed air to operating condition of test, and will not by test section resistance and this equipment and
The influence of equipment rear end back pressure, improves air velocity degree of regulation in test section, realize thermal hydraulic test system it is continuous,
Stablize, accurate gas supply control, improve the validity and reliability of test data.
It is according to embodiments of the present invention for the adjusting throat opening area of air testing and the device of test section flow velocity, wrap
It includes：Pipeline is adjusted, is defined in the adjusting pipeline along its axially extending access, described one end for adjusting pipeline is suitable for and pressure
The test section connection of contracting air test, the internal face of the other end for adjusting pipeline are equipped with the annular stop along its circumferentially extending
Portion；Motor, the motor are located in the adjusting pipeline, and the motor, which has along the axial direction for adjusting pipeline is telescopic, to be pushed away
Bar；Tapered plug, the tapered plug is located at one end of the push rod and the neighbouring annular stop portion, the tapered plug are generally formed into cone
Shape, the conical surface of the tapered plug is towards the annular stop portion, the air-flow limited between the conical surface and the annular stop portion
Channel is formed as throat, and the axial direction of the tapered plug along the access is movable with by adjusting described in the area control of the throat
The air velocity of test section；Control system, the control system are connected to control the motor operation with the motor.
It is according to embodiments of the present invention for the adjusting throat opening area of air testing and the device of test section flow velocity, it is logical
It crosses and is adjusting equipped with motor in pipeline, control system accurately controls motor driving push rod to run, and push rod pushes tapered plug to live in an axial direction
It is dynamic, so as to accurately control the axial position of tapered plug, and then throat opening area is controlled, the accurate air-flow velocity for adjusting test section.By
This, may be such that the flow control of test section compressed air to the ideal value of operating condition of test, and by test section resistance and will not set
Standby and equipment rear end back pressure influence improves air velocity degree of regulation in test section, realizes thermal hydraulic test system
Continuous, stable, accurate gas supply control, improve the validity and reliability of test data.
It is in addition, according to embodiments of the present invention for the adjusting throat opening area of air testing and the dress of test section flow velocity
Following additional technical characteristic can also be had by putting：
According to some embodiments of the present invention, the motor is axial step-servo motor.
Optionally, the axial stepping accuracy of the servo motor is 0.03-0.07mm.
Optionally, the servo motor includes：Electronic cylinder sleeve, the electronic cylinder sleeve are generally formed into along the access
Axially extending column, define chamber in the electronic cylinder sleeve；Electric cylinder, axial direction of the electric cylinder along the access
It is movably located in the chamber, the push rod is connected with the electric cylinder with scalable along the axial direction for adjusting pipeline.
Further, the axial both ends of the chamber are respectively equipped with limiting device to limit the stroke of the tapered plug.
Further, the limiting device is mechanical ram.
Optionally, it is set on the electric cylinder there are two the limit switch of the axially spaced arrangement along the access to detect
The position of the push rod.
Further, the limit switch is the Hall element being connected with the control system.
Optionally, the electronic cylinder sleeve by locating support be located at it is described adjusting pipeline in, the electronic cylinder sleeve with
The adjusting pipeline coaxial arrangement.
According to some embodiments of the present invention, the section in the annular stop portion is generally formed into triangle, the annular
The side wall surface of stopper section towards the tapered plug is substantially parallel with the conical surface of the tapered plug.
According to some embodiments of the present invention, flowing transition between the tapered plug and the push rod.
According to some embodiments of the present invention, the tapered plug is welded and fixed after being threadedly coupled with the push rod.
According to some embodiments of the present invention, be respectively equipped with connecting hole in the push rod and the tapered plug, the push rod with
The tapered plug is locked after being threadedly coupled by wire across the connecting hole.
According to some embodiments of the present invention, it is equipped with to walk suitable for what is be routed through between the motor and the control system
String holes and the air cooling runner suitable for heat dissipation, the motor are equipped with cooling hole.
The additional aspect and advantage of the present invention will be set forth in part in the description, and will partly become from the following description
It obtains significantly or is recognized by the practice of the present invention.
Description of the drawings
The above-mentioned and/or additional aspect and advantage of the present invention will become in the description from combination accompanying drawings below to embodiment
Significantly and it is readily appreciated that, wherein：
Fig. 1 is according to embodiments of the present invention for the adjusting throat opening area of air testing and the dress of test section flow velocity
The structure diagram put；
Fig. 2 be in Fig. 1 the embodiment of the present invention for the adjusting throat opening area of air testing and test section flow velocity
The partial enlarged view of device；
Reference sign：
100：For the adjusting throat opening area of air testing and the device of test section flow velocity；
1：Adjusting pipeline, 11：Access, 12：Annular stop portion, 13：Locating support；
2：Motor, 21：Electronic cylinder sleeve, 211：Chamber, 22：Electric cylinder, 23：Push rod；
3：Tapered plug, 31：The conical surface, 32：Throat；
4：Test section.
Specific embodiment
The embodiment of the present invention is described below in detail, the example of the embodiment is shown in the drawings, wherein from beginning to end
Same or similar label represents same or similar element or the element with same or like function.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to for explaining the present invention, and is not considered as limiting the invention.
In the description of the present invention, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
The instructions such as " thickness ", " on ", " under ", "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom " " interior ", " outer "
Orientation or position relationship are based on orientation shown in the drawings or position relationship, are for only for ease of the description present invention and simplification is retouched
It states rather than indicates or imply signified device or element must have specific orientation, with specific azimuth configuration and operation,
Therefore it is not considered as limiting the invention.
In addition, term " first ", " second " are only used for description purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity for indicating indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more this feature.In the description of the present invention, " multiple " are meant that two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term should be interpreted broadly, for example, it may be being fixedly connected or being detachably connected or be integrally connected；It can be machine
Tool is connected or is electrically connected；It can be directly connected, can also be indirectly connected by intermediary, can be two members
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in this hair as the case may be
Concrete meaning in bright.
Below with reference to the accompanying drawings description it is according to embodiments of the present invention for the adjusting throat opening area of air testing and examination
Test the device 100 of section flow velocity.
It is as shown in Figure 1, according to embodiments of the present invention for the adjusting throat opening area of air testing and test section stream
The device 100 of speed can include adjusting pipeline 1, motor 2, tapered plug 3 and control system.The present invention can be used for compressed air to be working medium
Thermal hydraulic test system air flow velocity control, such as the experiment of Steam Generators in NPP drier acoustic resonance pilot system
The compressed air flow control of section 4.
Specifically, it adjusts and is defined in pipeline 1 along its axially extending access 11, one end of adjusting pipeline 1 is suitable for and pressure
The test section 4 of contracting air test connects, and the internal face for adjusting the other end of pipeline 1 is equipped with along the annular stop portion of its circumferentially extending
12, motor 2, which is located at, to be adjusted in pipeline 1, and motor 2 has along the telescopic push rod 23 of axial direction for adjusting pipeline 1, and tapered plug 3, which is located at, to be pushed away
One end and adjacent rings stopper section 12 of bar 23, tapered plug 3 are generally formed into taper, and the conical surface 31 of tapered plug 3 is towards annular stop portion
12, the gas channel limited between the conical surface 31 and annular stop portion 12 is formed as throat 32, and the axial direction of tapered plug 3 along access 11 can
With the air velocity of the area control test section 4 by adjusting throat 32, control system is connected to control motor with motor 2 for activity
2 operations.
In other words, as shown in Figure 1, experiment of the compressed air for the compressed air experiment of the thermal hydraulic test system of working medium
Section 4 is connected with adjusting one end of pipeline 1, adjusts and access 11 is limited in pipeline 1, and access 11 is axially extending along adjusting pipeline 1,
The test section 4 of compressed air experiment is connected with access 11, and the compressed air of compressed air experiment can lead to the access for adjusting pipeline 1
In 11.
Motor 2 is located in access 11, and motor 2 is equipped with push rod 23, and tapered plug 3 is located on one end of push rod 23, adjusts pipeline 1
One end be connected with test section 4, adjust pipeline 1 the other end internal face be equipped with annular stop portion 12,12 edge of annular stop portion
Adjust the circumferentially extending setting of pipeline 1, tapered plug 3 is formed as substantially taper, the conical surface 31 of tapered plug 3 towards annular stop portion 12,
That is the tip of tapered plug 3 is towards annular stop portion 12.The internal face in annular stop portion 12 may be adapted to and the conical surface of tapered plug 3 31
Cooperation.Push rod 23 can control to make stretching motion in an axial direction in adjusting pipeline 1 by motor 2, so as to can control tapered plug 3 along adjusting
The axial activity of pipeline 1.
As shown in Figure 1, can limit gas channel between the conical surface 31 of tapered plug 3 and annular stop portion 12 is formed as throat
32, when push rod 23 is moved along the axial stretching for adjusting pipeline 1, tapered plug 3 is movable along the axial direction for adjusting pipeline 1 with push rod 23, this
Sample, the flow area of the gas channel between the conical surface 31 of tapered plug 3 and annular stop portion 12 increase or subtract with 3 activity of tapered plug
It is small.Such as in example as shown in Figure 1, in the direction for the test section 4 that push rod 23 is tested towards compressed air, activity is (i.e. as schemed
It is movable to the left shown in 1) when, tapered plug 3 is far from annular stop portion 12, and the flow area of gas channel increases, in 23 direction of push rod
When 12 direction of annular stop portion (right direction i.e. as shown in Figure 1) is movable, the circulation area of gas channel reduces, that is, passes through control
The area of throat 32 is adjusted, and controls the flow area of the air-flow of throat 32 in the activity of tapered plug 3 processed in axial direction.
In the system tested for compressed air, test section 4 can be passed through compressed air, and (such as air pressure is higher than 0.3MPa
Air), the throat 32 formed between the conical surface 31 of tapered plug 3 and annular stop portion 12 is had the velocity of sound by air, at this time according to sky
Mass flow of the gas when throat 32 reaches the velocity of sound be equal to test section 4 mass flow and test section 4 compressed air it is close
The relational expression of degree and flow velocity, can show that the gas flow rate of test section 4 is uniquely determined by 32 area of throat.
That is, by activity tapered plug 3, the area of throat 32 is adjusted, can accurately adjust the air-flow velocity of test section 4.
The flow control of the compressed air of test section 4 be may be such that as a result, to the ideal value of operating condition of test, and will not be hindered by test section 4
The influence of force-summing device and equipment rear end back pressure improves the air velocity degree of regulation of test section 4, realizes thermal-hydraulic examination
Continuous, stable, the accurate gas supply control of check system improves the validity and reliability of test data.
Control system is connected with motor 2, the operation of motor 2 is can control by control system, and then control push rod 23 and cone
Fill in 3 activity in an axial direction.Specifically, under different operating condition of test, when room temperature is determined with gas supply stagnation pressure, pass through control system
2 driving push rod 23 of controllable motor, push rod 23 pushes tapered plug 3 to move, accurately to control the axial position of tapered plug 3, so as to accurate
32 area of throat that the conical surface 31 of tapered plug 3 is controlled to be formed with annular stop portion 12, by forming critical flow in 32 position of throat, from
And the air-flow velocity of Control experiment section 4.
It is according to embodiments of the present invention for the adjusting throat opening area of air testing and the device of test section flow velocity
100, by being equipped with motor 2 in adjusting pipeline 1, control system accurately controls 2 driving push rod 23 of motor to run, and push rod 23 pushes
Tapered plug 3 is axially moveable, so as to accurately control the axial position of tapered plug 3, and then controls 32 area of throat, accurate to adjust experiment
The air-flow velocity of section 4.The flow control of 4 compressed air of test section be may be such that as a result, to the ideal value of operating condition of test, and will not be by
The influence of force-summing device and equipment rear end back pressure is hindered to test section 4, improves air velocity degree of regulation in test section 4, it is real
Continuous, stable, the accurate gas supply control of existing thermal hydraulic test system improves the validity and reliability of test data.
The compressed air of test section 4 leads to throat 32 by access 11, when 32 front pressure of throat is more than the 1.89 of back pressure
Times when, the mass flow when throat 32 forms the velocity of sound, reaches the velocity of sound according to principle of mass conservation throat 32 at this time is equal to compression
The density of 4 compressed air of mass flow and test section of 4 runner of air test section and the relational expression of flow velocity, therefore test section 4
Gas flow rate be the function of 32 area of throat and can be uniquely determined by 32 area of throat.That is, by accurately adjusting
32 area of throat is saved, so as to accurately adjust to obtain 4 required gas flow rate of test section.
Specifically, using the principle of mass conservation, when the mass flow of air testing section 4 reaches the velocity of sound equal to throat 32
Mass flow, i.e. air velocity × density × area=throat 32 of test section 4 air velocity × density × area, so as to
It can obtain (atmospheric density of atmospheric density/throat 32 of test section 4) × (air of air velocity/throat 32 of test section 4
Flow velocity)=(sectional area of sectional area/test section 4 of throat 32), since (experiment being determined by compressed-air power principle
Section 4 atmospheric density/throat 32 atmospheric density) be (air velocity of air velocity/throat 32 of test section 4) function,
Therefore (air velocity of air velocity/throat 32 of test section 4) by (sectional area of sectional area/throat 32 of test section 4) only
One determines.
In technological design, since the air velocity (i.e. the velocity of sound) of the sectional area of test section 4, throat 32 is that design determines
Value, therefore 4 air velocity of test section is the function about the area of throat 32, can be uniquely determined by the area of throat 32.By
This controls the activity of push rod 23 and tapered plug 3 in an axial direction by motor 2, the area of throat 32 can be accurately adjusted, so as to accurate
Ground adjusts to obtain 4 required gas flow rate of test section.
The mathematic(al) representation that more design method is related to is as follows：
According to the principle of mass conservation, the mass flow of air testing section 4 can be obtained and matter when throat 32 reaches the velocity of sound
It is equal to measure flow.
That is ρ uA=ρ*u*A* (1)
Wherein ρ represents atmospheric density；U represents air velocity；A represents sectional area；The parameter without subscript * represents examination in full text
The parameter of section 4 is tested, the parameter for having subscript * represents the parameter of throat 32.
According to compressed-air power principle, the atmospheric density of atmospheric density/throat 32 of test section 4 is as follows：
The relational expression represent (atmospheric density of atmospheric density/throat 32 of test section 4) be (air velocity of test section 4/
The air velocity of throat 32) function.WhereinFor velocity coeffficient, represent (air velocity of test section 4/
The air velocity of throat 32)；U represents the flow velocity of air test section 4, u*Represent 32 velocity of sound of throat.R is gas constant R=287, T*
Represent critical-temperature (the corresponding temperature of 32 velocity of sound of throat),T0For gas total temperature, γ is gas adiabatic exponent, this
Device design in can value be γ=1.4.
Mass flow relationship when the mass flow of air testing section 4 reaches the velocity of sound with throat 32 deforms as follows：
Above formula expression, λ (4 air velocity u/ throats of test section, 32 air velocity u*) it is A/A*(4 sectional areas of test section/throat
32 sectional areas) function.Since the air velocity (velocity of sound) of the sectional area of test section 4, throat 32 is that design determines value, then test
4 air velocity u of section are uniquely determined by 32 sectional area A* of throat.By adjusting 32 area of throat, can directly control empty in test section 4
Gas velocity.
Advantageously, motor 2 can be axial step-servo motor 2, and motor 2 is equipped with push rod 23, according to the stepping of motor 2
The stepping-in amount to control push rod 23 is measured, so as to accurately control the axial movement of push rod 23 and tapered plug 3, and then accurately controls throat
32 areas, accurately to adjust the air-flow velocity of the compressed air of test section 4.Specifically, servo motor 2 is according to the control of control system
The pulse of signal processed carries out stepping, and push rod 23 is moved by the stairstep signal of motor 2, and tapered plug 3 is located at one end of push rod 23, step
Stepping-in amount into the push rod 23 of servo motor 2 is equal to the stepping-in amount of tapered plug 3, is controlled by controlling the stepping-in amount of stepping push rod 23
The stepping-in amount of tapered plug 3.
Further, the hardware components of control system can include computer, control software, 2 driver of motor and PLC systems
System.Wherein, 2 driver of motor can realize outputting and inputting for the control to servo motor 2 and 2 signal of motor, control software
It can be connected directly by extended data line and 2 driver of the motor of testing ground, be sent out by control software to 2 driver of motor
Go out pulse signal, 2 driver of motor to step-servo motor 2 send out parameter needed for operating condition of test include umber of pulse, pulse frequency,
The pulse signal in direction, the pulse signal are digital signal, and testing ground, which can carry out data line protection, ensures that it is not tried
The interference and delay of other live signals are tested, servo motor 2 often receives a pulse signal, then controls push rod 23 leftward or rightward
Mobile a distance.
Control of the accurate control of 4 air velocity of test section dependent on 2 stepping-in amount of step-servo motor, advantageously, servo
The axial stepping accuracy of motor 2 can be 0.03-0.07mm.So as to improve the accuracy of 4 air velocity of test section measurement, carry
Top adjustment accuracy.Optionally, the precision of the axial stepping-in amount of servo motor 2 can be 0.05mm, pass through error propagation public affairs as a result,
It is 0.3% that formula, which can be calculated 4 compressed air stream speed degree of regulation of test section,.Test section 4 is pressed so as to further improve
The air velocity of contracting air is accurately adjusted.
Further, throat opening area A*It is adjusted by servo motor electric cylinder amount of feeding X, as shown in Fig. 2, D in the present apparatus
It is the determining value of design with α, wherein, the distance of the central axis of the inner terminal in D annular stops portion 12 to tapered plug 3, α stops for annular
Stopper 12 relative to adjust pipeline 1 axial direction angle of inclination.θ is the function of electric cylinder amount of feeding X, therefore the present apparatus is led to
Throat opening area can accurately be adjusted by overregulating servo motor electric cylinder amount of feeding X：
A*=f (X, D, α, θ) (4)
To sum up the design method of the air velocity of the area and test section 4 of the accurate control throat 32 of servo motor 2 is：Pass through
The accurate stepping-in amount X for adjusting servo motor 2, so as to accurately control throat opening area A*, the air stream of final accurate Control experiment section 4
Degree of hastening u.
In some examples of the present invention, servo motor 2 can include electronic cylinder sleeve 21 and electric cylinder 22, electronic cylinder sleeve
Cylinder 21 is generally formed into the axially extending column along access 11, and chamber 211,22 edge of electric cylinder are defined in electronic cylinder sleeve 21
The axial direction of access 11 is movably located in chamber 211, and push rod 23 is connected to stretch along the axial direction for adjusting pipeline 1 with electric cylinder 22
Contracting.As a result, by the way that electric cylinder 22 is controlled to adjust the axial activity of pipeline 1 in chamber 211, so as to can control push rod 23 along tune
The axial movement of length of tubing 1, and then the axial position of adjustable tapered plug 3, to adjust the circulation area of throat 32, reach accurate tune
Save the purpose of 4 compressed air flow velocity of test section.
As shown in Figure 1, the right end of the electric cylinder 22 of servo motor 2 can be equipped with push rod 23, the right end of push rod 23 is equipped with cone
Plug 3, electric rod is movable along the axial direction for adjusting pipeline 1 in chamber 211, and can control push rod 23 along the axial direction for adjusting pipeline 1
(left and right directions i.e. as shown in Figure 1) telescopic movable.
Further, the axial both ends of chamber 211 can be respectively equipped with limiting device to limit the stroke of tapered plug 3.Specifically,
The activity of electric cylinder 22 can be limited by the limiting device at both ends axial in chamber 211, and then tapered plug 3 can be limited along adjusting pipeline
1 axial stroke.It is more than to allow to be formed and destroy gas channel so as to prevent tapered plug 3.Optionally, limiting device can be machinery
Percussion device.When push rod 23 moves to the limiting device at both ends in chamber 211, electric cylinder 22 occurs machinery with limiting device and hits
It hits, and the locking due to mechanical impact, is more than to allow stroke and destroy gas flow so as to further prevent tapered plug 3.
Advantageously, the limit switch of the axially spaced arrangement there are two being set on electric cylinder 22 along access 11 to be pushed away with detecting
The position of bar 23.Two limit switches can limit length respectively as the reference bit and maximum activity of the stroke zero of tapered plug 3.It is logical
The position that two limit switches can detect push rod 23 is crossed, and detection information can be sent to control system.
Further, limit switch can be the Hall element being connected with control system.So as to improve limit switch detection
Accuracy.Specifically, limit switch can be used for the position of the push rod 23 of detection servo motor 2, when the push rod 23 of servo motor 2
When interior magnetic element is walked to limit-switch positions, limit switch sends a signal to control system.Control system reads limit
The signal of bit switch, when the walking of motor 2 is to another limit-switch positions, control system makes feedback, and can be in control system
Shown on interface, such as can display lamp it is bright, operator can 3 stroke dead-center position of accurate judgement tapered plug and maximum limit bit length,
3 stroke of initial time tapered plug that gas flow rate is adjusted is equal to zero.
In some examples of the present invention, electronic cylinder sleeve 21 can be located at by locating support 13 to be adjusted in pipeline 1, electronic
Cylinder sleeve 21 is coaxially disposed with adjusting pipeline 1, by locating support 13 so as to improving the push rod 23 of servo motor 2, tapered plug 3
With the concentricity of throat 32, it is ensured that 32 control accuracy of throat, and then improve the measuring accuracy of 4 air velocity of test section.
Optionally, as shown in Figure 1, the section in annular stop portion 12 is substantially formed as triangle, 12 court of annular stop portion
It is substantially parallel with the conical surface of tapered plug 3 31 to the side wall surface of tapered plug 3.The cone of the side wall surface in annular stop portion 12 and tapered plug 3 as a result,
Gas channel is limited between face 31, so as to ensure that the circulation area of gas channel in an axial direction is identical, ensures air in throat
The stationarity of 32 circulations.And then it is also beneficial to according to control of the throat 32 to 32 area of throat, improve the air-flow stream to test section 4
The accurate control of speed.
Advantageously, between tapered plug 3 and push rod 23 can flowing transition, so as to can realize that air-flow flows through tapered plug 3 and push rod 23
When seamlessly transit, effectively prevent aerodynamic loss caused by gas flow separation.
Optionally, tapered plug 3 is welded and fixed after being threadedly coupled with push rod 23.Tapered plug 3 and push rod 23 can not only be strengthened as a result,
Fixing intensity can also ensure tapered plug 3 and the concentricity of push rod 3, adjusting pipeline 1, be conducive to tapered plug 3 and throat 32 to a greater degree
Cooperation, realize with the basically identical flow operating mode of Theoretical Design, further to realize to the accurate of 4 air velocity of test section
Control improves the accuracy that air velocity is adjusted.
Advantageously, threaded connection can be used between tapered plug 3 and push rod 23, spot welding is carried out after adjusting pipeline 1 and assembling,
Point postwelding fine tuning is welded again, so as to the concentricity that maximally ensure that tapered plug 3 with adjust pipeline 1, ensure that 2 stepping-in amount of motor
Coordinate with throat 32, realize the flow operating mode consistent with Theoretical Design.
In some embodiments of the invention, connecting hole (not shown), push rod can be respectively equipped in push rod 23 and tapered plug 3
23 be threadedly coupled with tapered plug 3 after by wire across connecting hole lock.Thus tapered plug 3 and push rod 23 and motor 2 can be realized
Locking, it is stability that tapered plug 3 is connect with push rod 23, reliable so as to ensure that under 3 design condition of tapered plug of compact profile
Property, tapered plug 3 caused by stress caused by can also effectivelying prevent gas flow rate excessively high and Long-term Vibration loosens.
In some examples of the present invention, tapered plug 3 is connected through a screw thread with push rod 23, is connected in tapered plug 3 with push rod 23
Four apertures can be respectively opened on one end that one end and push rod 23 are connected with tapered plug 3, wire can be thin wire, and thin wire is to passing through
Tapered plug 3 and push rod 23 along the direction screwed tense and locked by aperture, thereby it is ensured that tapered plug 3 will not be in high flow rate air-flow
Vibration or even if tapered plug 3 vibration can not be rotated to the direction loosened, and then ensure tapered plug 3 connect stability and can
By property.
In some embodiments of the invention, be equipped between motor 2 and control system be suitable for the cable hole that is routed through and
Suitable for the air cooling runner of heat dissipation, motor 2 is equipped with cooling hole.As a result, so as to facilitate the line between motor 2 and control system
The setting on road and, and the heat dissipation to device and circuit can be realized by air cooling runner, by cooling hole can to motor 2 into
Row heat dissipation, to prevent motor 2 from being overheated due to closed.Further, air cooling runner can be with the air flow channel of experiment working medium
It does not connect, so as to both ensure the air cooling of motor 2 during work, motor 2 will not be overheated when closed, in turn ensures experiment stream
The leakproofness in road.
In the present invention unless specifically defined or limited otherwise, fisrt feature second feature it " on " or it " under "
It can be in direct contact including the first and second features, it is not to be in direct contact but pass through it that can also include the first and second features
Between other characterisation contact.Moreover, fisrt feature second feature " on ", " top " and " above " including first spy
Sign is right over second feature and oblique upper or is merely representative of fisrt feature level height higher than second feature.Fisrt feature exists
Second feature " under ", " lower section " and " following " right over second feature and oblique upper or be merely representative of including fisrt feature
Fisrt feature level height is less than second feature.
In the description of this specification, reference term " one embodiment ", " example ", " is specifically shown " some embodiments "
The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description
Point is contained at least one embodiment of the present invention or example.In the present specification, schematic expression of the above terms are not
Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any
One or more embodiments or example in combine in an appropriate manner.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is impossible to limitation of the present invention is interpreted as, those of ordinary skill in the art are not departing from the principle of the present invention and objective
In the case of can make changes, modifications, substitutions and variations to the above described embodiments within the scope of the invention.
Claims (14)
- It is 1. a kind of for the adjusting throat opening area of air testing and the device of test section flow velocity, which is characterized in that including：Adjust pipeline, defined in the adjusting pipeline along its axially extending access, described one end for adjusting pipeline be suitable for The test section connection of air testing, the internal face of the other end for adjusting pipeline, which is equipped with along the annular of its circumferentially extending, to be stopped Stopper；Motor, the motor are located in the adjusting pipeline, and the motor has telescopic along the axial direction for adjusting pipeline Push rod；Tapered plug, the tapered plug is located at one end of the push rod and the neighbouring annular stop portion, the tapered plug are generally formed into cone Shape, the conical surface of the tapered plug is towards the annular stop portion, the air-flow limited between the conical surface and the annular stop portion Channel is formed as throat, and the axial direction of the tapered plug along the access is movable with by adjusting described in the area control of the throat The air velocity of test section；Control system, the control system are connected to control the motor operation with the motor.
- 2. it is according to claim 1 for the adjusting throat opening area of air testing and the device of test section flow velocity, It is characterized in that, the motor is axial step-servo motor.
- 3. it is according to claim 2 for the adjusting throat opening area of air testing and the device of test section flow velocity, It is characterized in that, the axial stepping accuracy of the servo motor is 0.03-0.07mm.
- 4. it is according to claim 2 for the adjusting throat opening area of air testing and the device of test section flow velocity, It is characterized in that, the servo motor includes：Electronic cylinder sleeve, the electronic cylinder sleeve are generally formed into the axially extending column along the access, the electric cylinder Chamber is defined in sleeve；Electric cylinder, the electric cylinder are movably located at along the axial direction of the access in the chamber, the push rod and the electricity Dynamic cylinder is connected with scalable along the axial direction for adjusting pipeline.
- 5. it is according to claim 4 for the adjusting throat opening area of air testing and the device of test section flow velocity, It is characterized in that, the axial both ends of the chamber are respectively equipped with limiting device to limit the stroke of the tapered plug.
- 6. it is according to claim 5 for the adjusting throat opening area of air testing and the device of test section flow velocity, It is characterized in that, the limiting device is mechanical ram.
- 7. it is according to claim 4 for the adjusting throat opening area of air testing and the device of test section flow velocity, It is characterized in that, sets that there are two the limit switches of the axially spaced arrangement along the access to detect described push away on the electric cylinder The position of bar.
- 8. it is according to claim 7 for the adjusting throat opening area of air testing and the device of test section flow velocity, It is characterized in that, the limit switch is the Hall element being connected with the control system.
- 9. it is according to claim 4 for the adjusting throat opening area of air testing and the device of test section flow velocity, It is characterized in that, the electronic cylinder sleeve is located at by locating support in the adjusting pipeline, the electronic cylinder sleeve and the tune Length of tubing is coaxially disposed.
- 10. it is according to claim 1 for the adjusting throat opening area of air testing and the device of test section flow velocity, It is characterized in that, the section in the annular stop portion is generally formed into triangle, and the annular stop portion is towards the one of the tapered plug Side wall surface is substantially parallel with the conical surface of the tapered plug.
- 11. it is according to claim 1 for the adjusting throat opening area of air testing and the device of test section flow velocity, It is characterized in that, flowing transition between the tapered plug and the push rod.
- 12. it is according to claim 1 for the adjusting throat opening area of air testing and the device of test section flow velocity, It is characterized in that, the tapered plug is welded and fixed after being threadedly coupled with the push rod.
- 13. it is according to claim 1 for the adjusting throat opening area of air testing and the device of test section flow velocity, It is characterized in that, connecting hole is respectively equipped on the push rod and the tapered plug, and the push rod passes through after being threadedly coupled with the tapered plug Wire is locked across the connecting hole.
- 14. it is according to claim 1 for the adjusting throat opening area of air testing and the device of test section flow velocity, It is characterized in that, is equipped between the motor and the control system and is suitable for the cable hole that is routed through and cold suitable for the air of heat dissipation But runner, the motor are equipped with cooling hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611105656.5A CN108153341A (en) | 2016-12-05 | 2016-12-05 | For the adjusting throat opening area of compressed air experiment and the device of experimental section flow velocity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611105656.5A CN108153341A (en) | 2016-12-05 | 2016-12-05 | For the adjusting throat opening area of compressed air experiment and the device of experimental section flow velocity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108153341A true CN108153341A (en) | 2018-06-12 |
Family
ID=62470776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611105656.5A Pending CN108153341A (en) | 2016-12-05 | 2016-12-05 | For the adjusting throat opening area of compressed air experiment and the device of experimental section flow velocity |
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| CN (1) | CN108153341A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110780685A (en) * | 2019-08-20 | 2020-02-11 | 南京理工大学 | Incoming flow adjusting device for direct-connected experiment table |
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| CN206541205U (en) * | 2016-12-05 | 2017-10-03 | 国家电投集团科学技术研究院有限公司 | The regulation throat opening area and the device of experimental section flow velocity tested for compressed air |
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| US4278010A (en) * | 1979-07-23 | 1981-07-14 | United Technologies Corporation | Fluid flow regulator valve |
| CN2432554Y (en) * | 2000-07-21 | 2001-05-30 | 涟源钢铁集团有限公司 | Flow regulator with valve core |
| CN2433480Y (en) * | 2000-08-07 | 2001-06-06 | 涟源钢铁集团有限公司 | Coreless flow regulating device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110780685A (en) * | 2019-08-20 | 2020-02-11 | 南京理工大学 | Incoming flow adjusting device for direct-connected experiment table |
| CN110780685B (en) * | 2019-08-20 | 2023-01-13 | 南京理工大学 | Incoming flow regulating device for direct-connected experiment table |
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