CN109163873A - Quality test device suitable for low temperature and low pressure wind-tunnel wind field - Google Patents
Quality test device suitable for low temperature and low pressure wind-tunnel wind field Download PDFInfo
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- CN109163873A CN109163873A CN201810913314.9A CN201810913314A CN109163873A CN 109163873 A CN109163873 A CN 109163873A CN 201810913314 A CN201810913314 A CN 201810913314A CN 109163873 A CN109163873 A CN 109163873A
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- wind
- rotating mechanism
- test device
- wind field
- measurement
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
Abstract
The invention discloses a kind of wind field quality test devices suitable for low temperature and low pressure wind-tunnel, it mainly include mounting bracket, measurement bay, rotating mechanism and insulation cover, mounting bracket is fixed on a section of test chamber, wherein several Wind parameters in wind measurement sensors are arranged on measurement bay according to certain arrangement mode and status requirement, measurement bay is arranged on rotating mechanism, insulation cover is arranged between measurement bay and rotating mechanism, for carrying out temperature control to rotating mechanism, keep it in suitable operating temperature, under the driving of rotating mechanism, several Wind parameters in wind measurement sensors are rotated with the rotation of measurement bay, measure the Wind parameters in wind of same section everywhere.The device rotational angle controls precision and is better than 0.5 °, 0 °~360 ° of rotational angle range, it is small with being influenced on wind field uniformity, the Measurement channel resource of occupancy is few, the high feature of angle control precision, it solves the assessment and debugging under low temperature, low pressure to test air tunnel wind field quality, makes wind field environment real simulation test requirements document, meet the demand of related space flight and aviation model.
Description
Technical field
The invention belongs to spacecrafts, ground experiment of aircraft technical field, and in particular to one kind in ground simulation low temperature
When with hypobaric wind speed environments, by arranging that the sensors such as wind-warm syndrome, wind speed realize low temperature, low pressure wind-tunnel wind on the apparatus
The test of field quality.
Background technique
With the development of China's space mission, the detection of other exterior planets such as Mars is gradually carried out, in order to reach
The purpose of to the comprehensive verification and Modifying model of the star catalogues spacecraft such as lander, rover, needing for spacecraft to be mounted on can
The sufficient environment examination of wind-tunnel progress of low temperature, hypobaric is provided, that is, wind-tunnel is required to carry out temperature, pressure to star catalogue environment
The composite analogy of power, wind speed.To improve wind tunnel simulation precision, before the test, need to carry out the wind field quality that wind-tunnel provides comprehensive
Close test and assessment.
Wind-tunnel wind field quality is mainly used to illustrate the degree of model area flow field superiority and inferiority in test chamber, i.e. test chamber
The uniformity coefficient of interior flow parameter over time and space.Wind field attribute test at present is mainly to the same section each point of wind-tunnel
The parameters such as temperature, pressure, wind speed measure to assess the uniformity in the section.It needs when test in same section different location
Arrange that measurement sensor carries out gas-flow measurement, in principle for, point layout is more, and the accuracy of uniformity measurement is got over
Height, but sensor arrangement must be more, and the blocking of stream field is also bigger, will certainly influence to get over caused by the uniformity wind-tunnel section
Greatly.And measurement sensor arrangement is more, and the Measurement channel resource of occupancy is also more, keeps test macro more complicated.
Therefore, in order to realize the test of low temperature, low pressure wind-tunnel wind field quality, need to design a set of low temperature, low of being adapted to
The wind field quality test device of air pressure environment, can gas parameter uniformity to test chamber carry out it is effectively measuring, should
Device is small on wind field influence, and the Measurement channel resource of occupancy is few, and it is equal can more actually to react wind field of the wind-tunnel in same section
Even property.Before the star catalogues spacecraft model formal test such as Mars, by the device to test air tunnel wind field quality carry out assessment and
Debugging, makes the star catalogues states such as wind field environment real simulation Mars, has positive reality to test accuracy and test level is improved
Meaning.
Summary of the invention
The technical problem to be solved by the present invention is to provide a set of wind field quality test device under low pressure, cryogenic conditions,
Can gas parameter uniformity to test chamber carry out effectively measuring, which influences wind field uniformity small, occupies
Measurement channel resource it is few, can more accurately react wind-tunnel in the wind field uniformity in same section.Wind field quality of the invention
Test device is able to satisfy the tests, test test air tunnel wind field product such as other exterior planets detector, the stratospheric airships such as Mars
Matter is assessed and is debugged, and has both certain extended capability.
To solve the above problems, The technical solution adopted by the invention is as follows:
It mainly include mounting bracket, measurement bay, rotation suitable for the wind field quality test device of low temperature and low pressure wind-tunnel
Mechanism and insulation cover, mounting bracket are fixed on a section of test chamber, wherein several Wind parameters in wind measurement sensors are pressed
It is arranged on measurement bay according to certain arrangement mode and status requirement, measurement bay is arranged on rotating mechanism, and insulation cover setting exists
Between measurement bay and rotating mechanism, it is used to carry out temperature control to rotating mechanism, suitable operating temperature is kept it in, in rotating machine
Under the driving of structure, several Wind parameters in wind measurement sensors are rotated with the rotation of measurement bay, measure the wind field of same section everywhere
Parameter.
Wherein, the section is air inlet section.
Wherein, rotating mechanism is by stepper motor, harmonic wave speed reducing machine, transmission shaft, bearing, gear, rotary transformer, control
System composition, provides rotating torque and can accurately adjust record rotational angle.
Wherein, insulation cover is used to carry out temperature control to the stepper motor, transmission parts, rotary transformer of rotating mechanism, makes it
It is maintained at suitable operating temperature.
Wherein, on the basis of meeting intensity, the round tube or windward side for selecting diameter small are small for mounting bracket and measurement bay
Streamlined structure reduces the blocking of stream field.
Wherein, measurement bay is " cross " or " linear type " shape, the rotation axis connection of center and rotating mechanism.
Wherein, temperature, the pressure, wind speed parameter under each position state are measured by several Wind parameters in wind sensors, and are led to
Cross the control system record position information being connected electrically respectively and each road sensor measurement data.
Further, the lubricant medium of the components such as the stepper motor of rotating mechanism, transmission shaft, bearing is oil-free solid profit
It is sliding；
Further, rotating mechanism uses harmonic wave speed reducing machine, and major part is mounted on leeward；
Further, for low temperature and low pressure flow fields environment, using thin film heater and multilayer insulation establishment of component
Insulation cover carries out temperature control；
Further, the rotational angle of measurement bay, rotary transformer are measured in real time by the rotary transformer of rotating mechanism
It is mounted in shaft, in low temperature, low pressure flow fields environment, the decoder of the control system of rotating mechanism to be placed on wind-tunnel
Outside, it is not influenced by low temperature, hypobaric；
Further, the control cabinet of rotating mechanism control system is located at outside wind-tunnel, between the two by cable connection through walls,
Control cabinet is connect by network with host computer；
Further, host computer setting direction of rotation, revolving speed and position, setting of the PLC according to host computer, output height electricity
Ordinary mail number and pulse signal are to driver.The positive and negative rotation of low and high level signal control motor.Pulse frequency corresponds to revolving speed, umber of pulse
Corresponding position.It is rotated to control stepper motor according to direction initialization and speed, finally stops at setting position.Rotation
When, the physical location of angular transducer real-time monitoring shaft is compared with setting position, detects whether to reach setting position.
Of the invention is driven by measurement bay rotation and is mounted on suitable for low temperature, low pressure wind-tunnel wind field quality test device
The Wind parameters in wind of the same section of parameter measurement sensor measurement everywhere thereon, device rotational angle control precision are better than
It 0.5 °, 0 °~360 ° of rotational angle range, can be realized parameter measurement of the single sensor under same circumference different angle, have
Having influences wind field uniformity small, and the Measurement channel resource of occupancy is few, the high feature of angle control precision, can be more actually anti-
Answer wind-tunnel in the wind field uniformity in same section.Solve assessment under low temperature, low pressure to test air tunnel wind field quality and
Debugging, makes wind field environment real simulation test requirements document, meets the demand of related model.
Detailed description of the invention
Fig. 1 a is the front view for being suitable for low temperature, low pressure wind-tunnel wind field quality test device of the invention；
Fig. 1 b is the top view for being suitable for low temperature, low pressure wind-tunnel wind field quality test device of the invention；
In figure, 1, measurement bay；2, mounting bracket；3, rotating mechanism；4, insulation cover.
Fig. 2 is the rotating mechanism major part suitable for low temperature, low pressure wind-tunnel wind field quality test device of the invention
Structural schematic diagram；
In figure, 5, stepper motor；6, harmonic wave speed reducing machine；7, tapered roller bearing；8, bearing chamber；9, transmission shaft；10, gear
1；11, gear 2；12, rotary transformer；13, measurement bay mounting flange.
Specific embodiment
Low temperature, the progress of low pressure wind-tunnel wind field quality test device are suitable for specifically to of the invention referring to the drawings
It is bright, but this describe it is merely illustrative, it is no intended to protection scope of the present invention carry out any restrictions.
Referring to Fig. 1, Fig. 1 a is facing for the wind field quality test device for being suitable for low temperature and low pressure wind-tunnel of the invention
Figure, Fig. 1 b are the top views of the wind field quality test device for being suitable for low temperature and low pressure wind-tunnel of the invention, wherein this hair
Bright device mainly includes mounting bracket 2, measurement bay 1, rotating mechanism 3 and insulation cover 4.The device is fixed by mounting bracket 2
On test chamber section, it is typically mounted at air inlet section, wherein several Wind parameters in wind measurement sensors are according to one
Fixed arrangement mode is arranged on measurement bay 1 such as the mode and status requirement that equidistantly arrange, and measurement bay 1 shown in figure is ten
Font, measurement bay 1 are mounted on rotating mechanism 3, and under the driving of rotating mechanism 3, several measurement sensors are with 1 turn of measurement bay
It moves and rotates, measure Wind parameters in wind everywhere in being distributed on different circumference in same section.Mounting bracket 2 and measurement bay 1 are full
On the basis of sufficient intensity, the round tube of diameter 5cm is selected to the greatest extent, reduces the blocking of stream field.Between measurement bay 1 and rotating mechanism 3
Insulation cover 4 is set, and insulation cover 4 is used to carry out temperature control to the stepper motor, transmission parts, rotary transformer of rotating mechanism 3, makes it
It is maintained at suitable operating temperature.
Referring to fig. 2, Fig. 2 is the structural schematic diagram of rotating mechanism major part in apparatus of the present invention, and rotating mechanism is by stepping
Motor 5, harmonic wave speed reducing machine 6, transmission shaft 9, bearing 7, gear 1 and gear 2 11, rotary transformer 12, control system and
The composition such as measurement bay mounting flange 13, rotating mechanism provide rotating torque for measurement bay and can accurately adjust record rotational angle.
Wherein, rotating mechanism is become by stepper motor 5, harmonic wave speed reducing machine 6, transmission shaft 9, bearing 7, gear 1 and gear 2 11, rotation
The composition such as depressor 12, control system and measurement bay mounting flange 13, rotating mechanism provide rotating torque for measurement bay and can essences
Really adjust record rotational angle.Wherein, stepper motor 5 passes through harmonic wave speed reducing machine 6 and the rolling of the circular cone by being arranged in bearing chamber 8
In sub- bearing 7 output torque to transmission shaft 9, the top setting measurement bay mounting flange 13 of transmission shaft 9 with measurement bay for connecting.
Band moving gear 1 in 9 rotation process of transmission shaft, gear one are engaged by gear rotation passing to gear 2 11, and transformation is rotated
Two rotational angle of gear is converted to electric signal outflow by device 12, can calculate the rotation of rotation axis 9 in real time according to gear ratio
Angle.Rotating mechanism major part is mounted on leeward, and reducing flow resistance influences.Stepper motor, transmission shaft, the bearing of rotating mechanism
Equal moving components carry out vacuum and low temperature adaptability reform, deoil, and filled vacuum squeezes lubricating grease, then assemble.To movement mechanism
In can not carry out the position of temperature control, such as bearing assembly (bearing and bearing block), screw pair, calculate low temperature and transport at use temperature
The dynamic gap width needed, low temperature are given in design and are considered using the variable quantity between temperature and room temperature processing and manufacturing temperature, and
According to corresponding machinery standard rounding value.
Wherein, rotating mechanism causes stuck for movement clearance variation caused by material temperature unevenness under low temperature, according to
Using between temperature and room temperature, the difference of linear expansion coefficient rationally designs fit clearance, and fit clearance is made to adapt to low temperature ring
Use under border.
The harmonic wave speed reducing machine used in the present invention, kinematic accuracy is high, run smoothly, transmission efficiency is high, alignment is good, adopts
It is mounted in shaft with the rotary transformer for being suitable for low temperature, low compression ring border, measures the rotational angle of measurement bay in real time.
The control cabinet of rotating mechanism control system is mounted on outside wind-tunnel, is connected with rotating mechanism remaining part by cable through walls
It connects.Control cabinet is connect by network with host computer, and host computer setting direction of rotation, revolving speed and position, PLC are set according to host computer
It is fixed, low and high level signal and pulse signal are exported to driver.Low and high level signal controls the positive and negative rotation of motor.Pulse frequency
Corresponding revolving speed, umber of pulse corresponding position.It is rotated to control stepper motor according to direction initialization and speed, is finally stopped at
Setting position.When rotation, the physical location of angular transducer real-time monitoring shaft is compared with setting position, detects whether
Reach setting position.It, preferential some defencive functions in the logic control of control system.For example maximum (top) speed (passes through PLC program
Limit maximum speed), emergent stop signal, the type priority class of traffic height.
Insulation cover carries out temperature control to any temperature-sensitive components such as motor, rotary transformers.It is made of figuration metal sheet,
Thin film heater, thermocouple are pasted on metal sheet, and in the low temperature multilayer insulation component of external sheath Unit 10, insulation cover system
Work should be compact as far as possible, and any temperature-sensitive components can be made to be maintained at the blocking that suitable operating temperature reduces stream field again.
Experimental test process is generally as follows
1) system is installed.Device is fixed on test chamber air inlet section by mounting bracket, and by Wind parameters in wind
Measurement sensor is arranged on measurement bay according to certain arrangement and status requirement, the control cabinet installation of rotating mechanism control system
Outside wind-tunnel, with rotating mechanism remaining part by cable connection through walls, parameter measurement sensor will be believed also by cable through walls
It number leads to outside wind-tunnel；
2) hypobaric is established.It generally requires to open vacuum pump and be evacuated to after high vacuum and pours test gas and replaced,
And by process control to predetermined pressure, by taking Mars pressure as an example, control is generally required to 1400Pa ± 50Pa, gaseous environment is
CO2.Container needs the moment to control pressure, prevents pressure in calibration process from rising at any time；
3) low temperature environment is established.It is different according to calibration temperature, it is generally adjusted by control temperature adjustment heat-sink system more in wind-tunnel
A subregion heat sink temperature and gas temperature reach predetermined value, and by taking Mars temperature as an example, gas temperature is controlled to 150K~160K；
4) low temperature, low pressure wind field environment are established.Low temperature, low is formed by modes such as blowers or injection according to test requirements document
Air pressure wind field environment；
5) Wind parameters in wind is tested.After wind field ambient stable, surveyed by each Wind parameters in wind sensor being mounted on measurement bay
The parameters such as temperature, pressure, the wind speed under the location status are obtained, and are surveyed by control system record position information and each road sensor
Measure data；
6) accurately adjustment rotating mechanism is rotated to a certain specified angle, after wind field ambient stable, passes through each Wind parameters in wind
Sensor measures the parameters such as temperature, pressure, wind speed under new location status, and is sensed by computer record location information and each road
Device measurement data；
7) step 6) is repeated, until the parameter obtained represents the integrity attribute in the section enough, is with Mars wind-tunnel wind field
Example, each rotational angle of the device are 10 ° ± 0.5 °, 0 °~360 ° of rotational angle range；
8) location information of computer record and each road sensor measurement data are analyzed, pass through wind-tunnel by data assessment
The measurement data such as temperature, pressure, the wind speed of the section each point assess the uniformity in the section.
Although the detailed description and description of the specific embodiments of the present invention are given above, it should be noted that
We can carry out various equivalent changes and modification to above embodiment according to the concept of the present invention, and generated function is made
It, should all be within protection scope of the present invention when with the spirit still covered without departing from specification and attached drawing.
Claims (11)
- It mainly include mounting bracket, measurement bay, rotating machine 1. being suitable for the wind field quality test device of low temperature and low pressure wind-tunnel Structure and insulation cover, mounting bracket are fixed on a section of test chamber, wherein several Wind parameters in wind measurement sensors according to Certain arrangement mode and status requirement is arranged on measurement bay, and measurement bay is arranged on rotating mechanism, and insulation cover setting is being surveyed It measures between frame and rotating mechanism, is used to carry out temperature control to rotating mechanism, suitable operating temperature is kept it in, in rotating mechanism Driving under, several Wind parameters in wind measurement sensors are rotated with the rotation of measurement bay, measure same section everywhere wind field ginseng Number.
- 2. wind field quality test device as described in claim 1, wherein the section is air inlet section.
- 3. wind field quality test device as described in claim 1, wherein rotating mechanism is by stepper motor, harmonic wave speed reducing machine, biography Moving axis, bearing, gear, rotary transformer, control system composition, provide rotating torque and can accurately adjust record rotational angle.
- 4. wind field quality test device as described in claim 1, wherein insulation cover be used to the stepper motor of rotating mechanism, Transmission parts, rotary transformer carry out temperature control, keep it in suitable operating temperature.
- 5. wind field quality test device according to any one of claims 1-4, wherein mounting bracket and measurement bay are meeting by force On the basis of degree, the small streamlined structure of the round tube or windward side for selecting diameter small reduces the blocking of stream field.
- 6. wind field quality test device according to any one of claims 1-4, wherein measurement bay is " cross " or " a word The rotation axis connection of shape " shape, center and rotating mechanism.
- 7. wind field quality test device according to any one of claims 1-4, wherein surveyed by several Wind parameters in wind sensors Obtain temperature, the pressure, wind speed parameter under each position state, and the control system record position information by being connected electrically respectively And each road sensor measurement data.
- 8. wind field quality test device as claimed in claim 3, wherein stepper motor, transmission shaft, the bearing portion of rotating mechanism The lubricant medium of part is oil-free solid lubrication.
- 9. wind field quality test device according to any one of claims 1-4, wherein rotating mechanism uses harmonic wave speed reducing machine, And major part is mounted on leeward.
- 10. wind field quality test device according to any one of claims 1-4, wherein be directed to low temperature and low pressure flow field ring Border carries out temperature control using the insulation cover of thin film heater and multilayer insulation establishment of component.
- 11. wind field quality test device according to any one of claims 1-4, wherein the control of rotating mechanism control system Case is located at outside wind-tunnel, and between the two by cable connection through walls, control cabinet is connect by network with host computer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201810913314.9A CN109163873A (en) | 2018-08-10 | 2018-08-10 | Quality test device suitable for low temperature and low pressure wind-tunnel wind field |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810913314.9A CN109163873A (en) | 2018-08-10 | 2018-08-10 | Quality test device suitable for low temperature and low pressure wind-tunnel wind field |
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| CN201810913314.9A Pending CN109163873A (en) | 2018-08-10 | 2018-08-10 | Quality test device suitable for low temperature and low pressure wind-tunnel wind field |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112525473A (en) * | 2020-12-09 | 2021-03-19 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel variable attack angle device driven by screw pair and suitable for special temperature environment |
| CN113670565A (en) * | 2021-08-12 | 2021-11-19 | 同济大学 | Wind field measuring device and measuring method for wind power generation high tower model test |
| CN117538050A (en) * | 2024-01-04 | 2024-02-09 | 浙江贝良风能电子科技有限公司 | Yaw sensor testing device |
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Application publication date: 20190108 |