CN109282960A - A kind of rolling wind tunnel experiment model rotation-speed measuring device - Google Patents
A kind of rolling wind tunnel experiment model rotation-speed measuring device Download PDFInfo
- Publication number
- CN109282960A CN109282960A CN201811430251.8A CN201811430251A CN109282960A CN 109282960 A CN109282960 A CN 109282960A CN 201811430251 A CN201811430251 A CN 201811430251A CN 109282960 A CN109282960 A CN 109282960A
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- Prior art keywords
- bearing
- cylindrical portion
- measuring device
- swivel
- speed measuring
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Classifications
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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
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
- G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
- G01P3/42—Devices characterised by the use of electric or magnetic means
- G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
- G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
- G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
- G01P3/487—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by rotating magnets
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a kind of rolling wind tunnel experiment model rotation-speed measuring device, including bullet portion, magnetic inductor, body cylindrical portion, first bearing, foot piece, empennage, every going back to swivel, force balance, second bearing, magnet；The bullet portion and foot piece are respectively fixedly connected in body cylindrical portion rear and front end；The empennage is connected to foot piece end, and installation inner cavity is equipped with inside the bullet portion, and the magnet is arranged intracavitary in the installation of bullet portion；The bullet portion, body cylindrical portion, foot piece, empennage, magnet are co-axially mounted；It is equipped with accommodating cavity in the body cylindrical portion, it is described to be located in accommodating cavity every going back to swivel；And described first bearing and second bearing are respectively equipped with every going back to rear and front end between swivel and body cylindrical portion；The first bearing and second bearing are to carrying out revolving support every going back between swivel and body cylindrical portion；The force balance is located at internal every going back to swivel；The measurement of wind tunnel experiment model revolving speed can be achieved in the present invention.
Description
Technical field
The invention belongs to wind tunnel experiments to test fields of measurement, especially a kind of rolling wind tunnel experiment model tachometric survey dress
It sets.
Background technique
It is always to compare stubborn problem that the scan angle of rotating model and revolving speed, which quantify real-time measurement, in wind tunnel test.It is domestic
There are two types of the measurement means of wind-tunnel routine: one is tachograph is installed inside model, this mode can not only change bullet
The practical structures and weight of body, the authenticity and integrity of damage model, and it is difficult to transient rotative speed and the scanning of measurement model
Angle, measurement accuracy and accuracy be not also high；Another kind is binocular image measurement method, and this measurement method does not change model entirety
Structure, it is only necessary in model surface binding mark object, but during image processing, the characteristic point of high-speed rotary body is difficult to extract,
And cumbersome coordinate transform is carried out, measurement error is also larger.
In high-end wind-tunnel field, external continuous high-speed wind-tunnel starting is early, and quantity is more, and Medium Voltage Variable Frequency Speed Regulation Technology is applied to
It is ripe, but the reference that can be found in addition to revolving speed controls precision index is seldom；It in domestic continuous high-speed wind-tunnel starting evening, grinds
Lack of experience processed especially exists in terms of high-power high-accuracy frequency conversion speed-adjusting system independent development, revolving speed control precision measure certain
Gap.In practical application, no matter the industrial conventional speed measuring device or external velocity metre (instrument) for status monitoring,
The problems such as requiring is exported in the presence of cannot be considered in terms of measurement accuracy, measurement period and data.Especially for the high voltage variable with speed closed loop
Frequency modulation speed system can only utilize the tap measurement of original encoder since drive shaft system installs other speed measuring devices without space
Revolving speed, but this mode that the directly external measurement of isolating device is not added easily introduce interference, and frequency converter and high-tension apparatus is caused to damage
It ruins.In addition, original encoder code disc resolution ratio is low, it is insufficient to also result in direct measurement accuracy.
Summary of the invention
The purpose of the present invention is to provide a kind of rolling wind tunnel experiment model rotation-speed measuring devices, to solve existing wind-tunnel
Experimental model revolving speed is difficult to measure, and experimental model inner space is insufficient, and especially foot piece section diameter is small, can not arrange that revolving speed is remembered
Record instrument or other speed measuring devices, the problem for causing measurement difficult.
The technical solution for realizing the aim of the invention is as follows:
A kind of rolling wind tunnel experiment model rotation-speed measuring device, including bullet portion, magnetic inductor, body cylindrical portion, first
Bearing, foot piece, empennage, every going back to swivel, force balance, second bearing, magnet；
The bullet portion and foot piece are respectively fixedly connected in body cylindrical portion rear and front end；The empennage is connected to foot piece end,
Installation inner cavity is equipped with inside the bullet portion, the magnet is arranged intracavitary in the installation of bullet portion；The bullet portion, body cylinder
Portion, foot piece, empennage, magnet are co-axially mounted；It is equipped with accommodating cavity in the body cylindrical portion, it is described to be located at accommodating every going back to swivel
In cavity；And described first bearing and second bearing are respectively equipped with every going back to rear and front end between swivel and body cylindrical portion；Institute
First bearing and second bearing are stated to carrying out revolving support between swivel and body cylindrical portion every going back to；The force balance is located at
It is internal every going back to swivel.
Compared with prior art, the present invention its remarkable advantage:
(1) rotation-speed measuring device of the invention, the magnet by being embedded in body front end will generate rotation due to rotating
Magnetic induction line simultaneously cuts induction coil, adjusts coil size and the number of turns, the periodic vibration voltage of sufficient intensity can be generated in coil,
And by amplification and filter circuit, the oscillating curve of induced voltage finally can be obtained.
(2) rotation-speed measuring device of the invention, bullet portion, cylindrical portion, foot piece, bearing are every going back to swivel, sleeve, first axle
Hold, second bearing is Axisymmetric Revolution body, installation in the same axial direction, play and avoid periodically answering as caused by unbalance dynamic
The effect that power damages model and force balance, while making measurement data accurate.
(3) rotation-speed measuring device of the invention, magnetic inductor are arranged in wind-tunnel outside glass visible observation window, can be greatly
The occupied space of rotation-speed measuring device is saved, while directly magnetic inductor can be adjusted, without entering wind turbine apparatus
Operation.
(4) rotation-speed measuring device of the invention is additionally provided with an attack angle mechanism, and it is each under the different angles of attack to can record model
The power and torque in direction.
Present invention is further described in detail with reference to the accompanying drawing.
Detailed description of the invention
Fig. 1 is rolling wind tunnel experiment model rotation-speed measuring device general structure schematic diagram of the invention.
Fig. 2 is rolling wind tunnel experiment model rotation-speed measuring device experimental principle figure of the invention.
Fig. 3 is rolling wind tunnel experiment model rotation-speed measuring device measurement gained voltage oscillation curve graph of the invention.
Specific embodiment
In order to illustrate technical solution of the present invention and technical purpose, with reference to the accompanying drawing and specific embodiment is the present invention
It is further to introduce.
In conjunction with Fig. 1, a kind of rolling wind tunnel experiment model rotation-speed measuring device of the invention, including bullet portion 1, magnetic inductor
2, body cylindrical portion 5, first bearing 6, foot piece 7, empennage 8, every going back to swivel 10, force balance 12, second bearing 13, magnet
14；
The bullet portion 1 and foot piece 7 are respectively fixedly connected in 5 rear and front end of body cylindrical portion；The empennage 8 is connected to foot piece 7
End, is equipped with installation inner cavity inside the bullet portion 1, the magnet 14 be arranged bullet portion 1 install it is interior intracavitary；The bullet portion 1,
Body cylindrical portion 5, foot piece 7, empennage 8, magnet 14 are co-axially mounted；It is equipped with accommodating cavity in the body cylindrical portion 5, it is described every turning
Revolving body 10 is located in accommodating cavity；And described the is respectively equipped with every going back to rear and front end between swivel 10 and body cylindrical portion 5
One bearing 6 and second bearing 13；The first bearing 6 and second bearing 13 are to every going back between swivel 10 and body cylindrical portion 5
Play revolving support, relatively rotate the two can；The force balance 12 be located at every go back to swivel 10 inside.
After internal components are successively installed, the bullet portion 1, cylindrical portion 5, foot piece 7, bearing every go back to swivel 10,
Sleeve 11, first bearing 6, second bearing 13 are Axisymmetric Revolution body；It is covered before and after bullet portion 1, cylindrical portion 5, foot piece 7, empennage 8
Even composition complete model.In model installation process, these components need to be installed in the same axial direction, played and avoided by unbalance dynamic
The effect that caused cyclic stress damages model and force balance 12.Wind tunnel device has a balance mounting base,
It is placed in wind-tunnel, balance mounting base is protruded into from 7 end of foot piece, until every going back to 10 posterior segments of swivel；10 rear ends are turned every going back to
Equipped with tapered surface 9, balance mounting base is agreed with tapered surface 9, and balance mounting base front end is connect with force balance 12；Magnetic inductor 2
It is placed in wind-tunnel outside glass observation window.The experimental model device installation, which is placed, as a result, completes.The experimental model is placed in model
In HG-4 wind-tunnel, also to can be used in other experimental situations or device measuring；
Further, the magnet 14 is fixed on intracavitary in installation by clamping piece 15, and 15 shape of clamping piece is circle
Cylinder, inside have polygon groove；14 shape of magnet is polygon, is engaged with 15 polygon groove of clamping piece；Pass through clamping
Part 15 is fixed on intracavitary in installation, plays fixed function, avoid because magnet 14 occur it is mobile due to experiment measurement is had an impact.
Further, the clamping piece 15 is made of non-magnetic material.Magnetic induction line will not be generated because of movements such as rollings, it is right
Experiment has no effect, while can play fixed, buffering and electrical isolation protective effect well.
Preferably, 15 material of clamping piece is Fypro, and Fypro does not have any magnetism.
Further, the magnetic inductor 2 includes shell, magnetic induction coil 3 and filtering and amplifying circuit 4；The magnetic strength
Coil 3 and filtering and amplifying circuit 4 is answered to be mounted in shell；Magnetic induction coil 3 is connected with filtering and amplifying circuit 4.
When experiment, by between model and force balance 12 by every go back to swivel 10 carry out every turn, its purpose is that testing
During progress, body model can realize high speed rotation state around the free rolling of axis, at the same time, positioned at every going back to
Force balance 12 in body 10 will remain stationary state, and force balance can measure the directive power of institute and torque data.In model
After completing processing and assembly, it is necessary first to carry out unbalance dynamic experiment to model, it is ensured that model places steady and spin stabilization, together
When place magnetic inductor 2 in wind-tunnel side glass visible observation window.During carrying out wind tunnel experiment, firstly, experimental model is sharp
Rolling movement is generated with the spin square of leading that empennage 8 generates, and is finally reached balancing speed.It is mounted on 1 inside cabin front end of bullet portion
The line of magnetic induction that magnet 14 is placed in the glass visible observation window on the outside of wind-tunnel due to rotating the magnetic induction line and cutting that will generate rotation
Circle 3, and because 14 shape of magnet is regular shape changeable, 3 size of magnetic induction coil and the number of turns are adjusted, can be produced in magnetic induction coil 3
The rectilinear oscillation voltage of raw sufficient intensity, rectilinear oscillation voltage handle circuit by filtering and amplifying circuit 4, finally may be used
The oscillating curve of induced voltage is obtained, frequency of oscillation is the rolling frequency (revolving speed) of body model.
Further, rolling wind tunnel experiment model rotation-speed measuring device of the invention, is additionally provided with an attack angle mechanism, described
Attack angle mechanism is fixed on 7 rear end of foot piece；When experiment, the air-flow in wind-tunnel is adjusted, high-speed flow reaches experimental section by accelerating, makes
Air-flow reaches specified Mach number；When air-flow reaches stable, start to test.It is each under the different angles of attack that force balance can record model
The power and torque in a direction.
In conjunction with Fig. 3, when 14 shape of magnet is regular quadrilateral, gained is measured in the wind tunnel experiment that rotation-speed measuring device measures
Voltage oscillation curve graph, horizontal axis is time t (s) in figure, and the longitudinal axis is induced voltage U (v), and curve is periodic rectangular wave, is led to
Cross figure you can get it revolving speed.
Rolling wind tunnel experiment model rotation-speed measuring device of the invention is embedded in the magnet of body front end since rotation will produce
The magnetic induction line of raw rotation simultaneously cuts induction coil, adjusts coil size and the number of turns, the period of sufficient intensity can be generated in coil
Voltage is shaken, and by amplification and filter circuit, the oscillating curve of induced voltage finally can be obtained, frequency of oscillation is body
Rolling frequency.Magnetic inductor 2 is arranged in wind-tunnel outside glass visible observation window, can greatly save occupied by rotation-speed measuring device
Space, while directly magnetic inductor 2 can be adjusted, be operated without entering wind turbine apparatus.Magnet 14 of the invention is
Magnet, 3 material of magnetic induction coil are copper coil, are all made of common used material, cost compared with Hall element, tachograph or its
Its speed measuring device is cheap, and easy to process, manufacture, carrying and installation.
Claims (6)
1. a kind of rolling wind tunnel experiment model rotation-speed measuring device, it is characterized in that, including bullet portion (1), magnetic inductor (2), bullet
Body cylindrical portion (5), first bearing (6), foot piece (7), empennage (8), every go back to swivel (10), force balance (12), second bearing
(13), magnet (14)；
The bullet portion (1) and foot piece (7) are respectively fixedly connected in body cylindrical portion (5) rear and front end；The empennage (8) is connected to tail
Bar (7) end, the bullet portion (1) is internal to be equipped with installation inner cavity, and magnet (14) setting bullet portion (1) is installed interior intracavitary；
The bullet portion (1), body cylindrical portion (5), foot piece (7), empennage (8), magnet (14) are co-axially mounted；The body cylindrical portion
(5) in be equipped with accommodating cavity, it is described every go back to swivel (10) be located at accommodating cavity in；And it is described every going back to swivel (10) and body
Rear and front end is respectively equipped with first bearing (6) and second bearing (13) between cylindrical portion (5)；The first bearing (6) and second
Bearing (13) to every go back to swivel (10) and body cylindrical portion (5) between carry out revolving support；The force balance (12) is located at
It is internal every going back to swivel (10).
2. rolling wind tunnel experiment model rotation-speed measuring device according to claim 1, it is characterized in that, the magnet (14) is logical
Cross clamping piece (15) be fixed on installation in it is intracavitary, the clamping piece (15) be cylindrical body, inside have polygon groove；The magnet
(14) shape is polygon, is engaged with clamping piece (15) polygon groove.
3. rolling wind tunnel experiment model rotation-speed measuring device according to claim 2, it is characterized in that, the clamping piece (15)
It is made of non-magnetic material.
4. rolling wind tunnel experiment model rotation-speed measuring device according to claim 3, it is characterized in that, the non-magnetic material is
Fypro.
5. rolling wind tunnel experiment model rotation-speed measuring device according to claim 1, it is characterized in that, the magnetic inductor
It (2) include shell, magnetic induction coil (3) and filtering and amplifying circuit (4)；The magnetic induction coil (3) and filtering and amplification electricity
Road (4) is mounted in shell；Magnetic induction coil (3) is connected with filtering and amplifying circuit (4).
6. rolling wind tunnel experiment model rotation-speed measuring device according to claim 1, it is characterized in that the foot piece (7) rear end
It is further fixed on an attack angle mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811430251.8A CN109282960A (en) | 2018-11-28 | 2018-11-28 | A kind of rolling wind tunnel experiment model rotation-speed measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811430251.8A CN109282960A (en) | 2018-11-28 | 2018-11-28 | A kind of rolling wind tunnel experiment model rotation-speed measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN109282960A true CN109282960A (en) | 2019-01-29 |
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ID=65173698
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811430251.8A Pending CN109282960A (en) | 2018-11-28 | 2018-11-28 | A kind of rolling wind tunnel experiment model rotation-speed measuring device |
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| CN (1) | CN109282960A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111521370A (en) * | 2020-05-12 | 2020-08-11 | 中国人民解放军国防科技大学 | Specific phase bit flow field testing device and method suitable for pulse wind tunnel rotation model |
| CN114018536A (en) * | 2021-10-14 | 2022-02-08 | 西安航天动力试验技术研究所 | System and method for measuring aerodynamic moment in wind tunnel test of aircraft |
| CN114112289A (en) * | 2021-10-14 | 2022-03-01 | 西安航天动力试验技术研究所 | Blade type rotating test piece rotating speed measuring device and measuring system and method thereof |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111521370A (en) * | 2020-05-12 | 2020-08-11 | 中国人民解放军国防科技大学 | Specific phase bit flow field testing device and method suitable for pulse wind tunnel rotation model |
| CN111521370B (en) * | 2020-05-12 | 2021-04-13 | 中国人民解放军国防科技大学 | Specific phase bit flow field testing device and method suitable for pulse wind tunnel rotation model |
| CN114018536A (en) * | 2021-10-14 | 2022-02-08 | 西安航天动力试验技术研究所 | System and method for measuring aerodynamic moment in wind tunnel test of aircraft |
| CN114112289A (en) * | 2021-10-14 | 2022-03-01 | 西安航天动力试验技术研究所 | Blade type rotating test piece rotating speed measuring device and measuring system and method thereof |
| CN114112289B (en) * | 2021-10-14 | 2024-02-06 | 西安航天动力试验技术研究所 | Vane type rotation test piece rotating speed measuring device and measuring system and method thereof |
| CN114018536B (en) * | 2021-10-14 | 2024-04-05 | 西安航天动力试验技术研究所 | System and method for measuring aerodynamic moment in aircraft wind tunnel test |
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Application publication date: 20190129 |