CN113029505B - Wind tunnel flow field mobile measurement device - Google Patents
Wind tunnel flow field mobile measurement device Download PDFInfo
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- CN113029505B CN113029505B CN202110268724.4A CN202110268724A CN113029505B CN 113029505 B CN113029505 B CN 113029505B CN 202110268724 A CN202110268724 A CN 202110268724A CN 113029505 B CN113029505 B CN 113029505B
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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
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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
- G01M9/04—Details
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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a wind tunnel flow field movement measuring device. The device includes a fixed part, a driving part and a moving part. The bent blade connecting bracket of the fixing part is fixed on the wind tunnel bent blade mechanism; an output shaft of a speed reducer motor of the driving part is fixedly connected with a gear above the speed reducer seat; the movable shaft of the movable part is provided with a rack meshed with the gear; the motor of the speed reducer drives a gear which is meshed with a rack, and the rack drives the axially movable base plate to move back and forth along the axial direction. The speed reducer motor of the device is positioned behind the wind tunnel knife bending mechanism, so that the blocking degree of the mechanism can be effectively reduced. The device has simple structure and convenient installation, has small blocking degree in the wind tunnel, can move forwards and backwards along the wind tunnel shaft, can install different measuring instruments at the head installation interface of the axial moving substrate according to the requirement, can be used for carrying out dynamic and static flow field calibration of the wind tunnel, can be used as a supporting mechanism of a model for carrying out wind tunnel test, and has universality.
Description
Technical Field
The invention belongs to the technical field of wind tunnel tests, and particularly relates to a wind tunnel flow field movement measuring device.
Background
The wind tunnel test has extremely high requirements on the uniformity of the space flow field, and because the quality of the flow field can directly influence the quality of test data, in order to ensure accurate and reliable test results, the quality of the flow field of a test section must be detected by a reasonable measurement method before the test, and the distribution range of the uniform area of the flow field is obtained. In general, the flow field calibration test can be carried out after the wind tunnel is built and the heavy equipment is transformed, and the flow field calibration test is carried out regularly even under normal conditions so as to ensure that the flow field of the wind tunnel is stable and reliable in the use process and no abnormality occurs.
The flow field calibration comprises a plurality of contents such as speed field calibration, direction field calibration, turbulence calibration and the like, and different measuring tools are needed to be selected according to the calibration contents during the calibration. In the case of directional field calibration, because the flow field in a certain space range needs to be measured point by point, a special mobile measuring device is also required to be designed, so that a tester can quickly and accurately change the position of the probe. The conventional mobile measuring device in the wind tunnel mostly adopts a structure of a movable guide rail and a movable bent frame or a gantry frame, the mechanical structure and a control system of the device are complex, the installation process is relatively complicated, the movable guide rail or the gantry frame is required to be installed in the wind tunnel particularly during flow field measurement, the blocking degree of the mechanism is relatively large, in addition, in order to ensure that the wind tunnel has enough structural strength when the incoming flow speed is high, the size of each part of the device is relatively large, and a plurality of limitations exist during the application of the small-size wind tunnel.
Currently, development of a wind tunnel flow field mobile measurement device capable of being flexibly installed is needed.
Disclosure of Invention
The invention aims to provide a wind tunnel flow field movement measuring device.
The invention relates to a wind tunnel flow field movement measuring device which is characterized by comprising a fixed part, a driving part and a moving part;
the fixed part comprises a curved knife connecting bracket, a rear cover plate and a speed reducer seat; the bending knife connecting bracket is fixed on the wind tunnel bending knife mechanism, the wind tunnel incoming flow direction is taken as the front, a horizontal rear cover plate is fixed on the upper surface of the rear end of the bending knife connecting bracket, and a horizontal speed reducer seat is fixed on the lower surface of the rear end of the bending knife connecting bracket;
the driving part comprises a speed reducer motor and a gear, the speed reducer motor is positioned at the rear of the curved knife connecting bracket, and an output shaft of the speed reducer motor vertically penetrates out of the speed reducer base upwards through a bearing fixed in the speed reducer base and is fixedly connected with the gear positioned above the speed reducer base;
the moving part comprises an axial moving base plate, an axial moving base plate cover plate and a rack; the axial moving base plate and the axial moving base plate cover plate are elongated battens; a head mounting interface is arranged at the front end of the axial moving base plate; the inner side surface of the curved knife connecting bracket facing the axially movable substrate is provided with a wiring groove at the front section, and the surface is covered with an axially movable substrate cover plate; the upper surface of the rear section of the axial moving substrate is provided with a pipeline groove communicated with the wiring groove, and the upper surface of the pipeline groove is provided with a front cover plate; an isolation slit is arranged between the upper surface of the front cover plate and the lower surface of the rear cover plate; a rack meshed with the gear is arranged at the lower part of the axial moving base plate;
the speed reducer motor drives a gear which is meshed with a rack to move forwards, and the rack drives an axially moving substrate to move forwards and backwards along the axial direction;
the central axis of the head mounting interface coincides with the central axis of the wind tunnel.
Further, the height of the isolation joint is larger than or equal to the depth of the pipeline groove.
Further, the front windward side of the head mounting interface is subjected to pneumatic repair.
Further, the head mounting interface is provided with a single total static pressure probe, a multi-hole probe, a hot wire anemometer, a measurement bent or a test model.
Further, the outer side surface of the axial moving base plate is gradually expanded from front to back, and pneumatic shaping is performed.
Further, the axially movable base plate and the axially movable base plate cover plate are fixedly connected through screws which are arranged in series.
Further, the inner side surface of the curved knife connecting support, which faces the axially movable substrate cover plate, is provided with a square groove, and the assembly of the axially movable substrate and the axially movable substrate cover plate moves back and forth in the square groove, and the square groove has the double functions of limiting and sliding rails.
Further, the rear cover plate is internally provided with a hole for hole digging and weight reduction.
Further, the length of the rack is greater than or equal to the length of the uniform area of the wind tunnel flow field.
The wind tunnel flow field movement measuring device uses the existing curved knife mechanism of the wind tunnel test section as an installation basis, the installation process is simple and convenient, the wind tunnel flow field movement measuring device can move forwards and backwards along the wind tunnel axis after being installed, and the movement range can cover the flow field uniform area of the whole test section.
The wind tunnel flow field movement measuring device can be used for wind tunnel dynamic and static flow field calibration, can be used as a supporting mechanism of a model for wind tunnel test, and has multiple purposes.
The front end of the axially movable substrate of the wind tunnel flow field movable measuring device has rich interfaces, can be provided with a single total static pressure probe, a multi-hole probe, a hot wire anemometer or a measuring bent frame according to the requirements, can be provided with a test model, can be used for wind tunnel dynamic and static flow field calibration, can be used for developing wind tunnel tests, and has universality.
The wind tunnel flow field movement measuring device is simple in structure, high in integration level and convenient to install, except for the fact that the axially moving base plate extends into the test section, the rear cover plate, the speed reducer seat, the speed reducer motor and other parts are all located in the super-expansion section with low requirements for blocking degree in the wind tunnel, and particularly the speed reducer motor is located on the leeward side of the curved knife mechanism, so that blocking degree in the wind tunnel is effectively reduced, and the use requirement of a small wind tunnel can be met.
Drawings
FIG. 1 is a schematic diagram of the main structure (right side view) of a wind tunnel flow field movement measuring device of the present invention;
FIG. 2 is a schematic diagram of the main structure of the wind tunnel flow field movement measuring device (left side view);
FIG. 3 is a schematic diagram (exploded view) of the main structure of the wind tunnel flow field movement measuring device of the present invention;
FIG. 4 is a schematic diagram of the main structure of the wind tunnel flow field movement measuring device (a curved knife connecting bracket diagram);
FIG. 5 is a schematic diagram of the main structure of the wind tunnel flow field movement measuring device (axial movement substrate diagram) of the present invention;
FIG. 6 is a schematic diagram of an application mode of installing a single probe at the front end of the wind tunnel flow field movement measuring device;
fig. 7 is a schematic diagram of an application mode of the wind tunnel flow field movement measuring device provided by the invention in which a measuring bent is arranged at the front end.
In the figure, 1, a head mounting interface 2, an axially moving base plate 3, an axially moving base plate cover plate 4, a bent cutter connecting bracket 5, a front cover plate 6, a rear cover plate 7, a gear 8, a rack 9, a speed reducer base 10, a speed reducer motor 11, a wiring groove 12, a wiring groove 13, a probe 14 and a measuring bent frame.
Detailed Description
The invention is described in detail below with reference to the drawings and examples.
As shown in fig. 1, 2 and 3, the wind tunnel flow field movement measuring device of the invention comprises a fixed part, a driving part and a moving part;
the fixed parts comprise a curved knife connecting bracket 4 (see figure 4), a rear cover plate 6 and a speed reducer seat 9; the curved knife connecting bracket 4 is fixed on the wind tunnel curved knife mechanism, the wind tunnel incoming flow direction is taken as the front, a horizontal rear cover plate 6 is fixed on the upper surface of the rear end of the curved knife connecting bracket 4, and a horizontal speed reducer base 9 is fixed on the lower surface of the rear end of the curved knife connecting bracket;
the driving part comprises a speed reducer motor 10 and a gear 7, the speed reducer motor 10 is positioned at the rear of the bent cutter connecting bracket 4, and an output shaft of the speed reducer motor 10 vertically penetrates out of the speed reducer base 9 upwards through a bearing fixed in the speed reducer base 9 and is fixedly connected with the gear 7 positioned above the speed reducer base 9;
the moving parts include an axially moving base plate 2 (see fig. 5), an axially moving base plate cover plate 3, and a rack 8; the axial moving base plate 2 and the axial moving base plate cover plate 3 are elongated battens; a head mounting interface 1 is arranged at the front end of the axial moving base plate 2; the front section of the inner side surface of the curved knife connecting bracket 4 facing the axial moving substrate 2 is provided with a wiring groove 11, and the surface of the curved knife connecting bracket is covered with an axial moving substrate cover plate 3; a pipeline groove 12 communicated with the wiring groove 11 is formed on the upper surface of the rear section of the axial moving base plate 2, and a front cover plate 5 is arranged on the upper surface of the pipeline groove 12; an isolation slit is arranged between the upper surface of the front cover plate 5 and the lower surface of the rear cover plate 6; a rack 8 engaged with the gear 7 is mounted on the lower part of the axially movable base plate 2;
the speed reducer motor 10 drives the gear 7, the gear 7 is meshed with the rack 8 to move forwards, and the rack 8 drives the axially movable substrate 2 to move forwards and backwards along the axial direction;
the central axis of the head-mounted interface 1 coincides with the central axis of the wind tunnel.
Further, the height of the isolation slit is greater than or equal to the depth of the pipeline groove 12.
Further, the front end windward side of the head mounting interface 1 is subjected to pneumatic repair.
Further, the head mounting interface 1 is provided with a single total static pressure probe, a multi-hole probe, a hot wire anemometer, a measurement bent or a test model.
Further, the outer side surface of the axially movable substrate 2 is gradually widened from front to back, and pneumatic shaping is performed.
Further, the axially movable base plate 2 and the axially movable base plate cover plate 3 are fixedly connected by screws arranged in series.
Further, the inner side surface of the curved knife connecting bracket 4 facing the axially movable substrate cover plate 3 is provided with a square groove, the assembly of the axially movable substrate 2 and the axially movable substrate cover plate 3 moves back and forth in the square groove, and the square groove has the double functions of limiting and sliding rails.
Further, the rear cover plate 6 is internally provided with a hole for weight reduction.
Further, the length of the rack 8 is greater than or equal to the length of the uniform area of the wind tunnel flow field.
The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Example 1
The embodiment is an application mode when a single probe is installed at the front end of the device.
In this embodiment, as shown in fig. 6, a single probe 13 is fixedly connected with the head mounting interface 1, and a pressure measuring pipeline or power line extends to the rear side of the device through a wiring groove 11 and a pipeline groove 12 of the axially movable substrate 2, extends out of the test section through an isolation joint at the rear side of the wind tunnel knife bending mechanism, and is connected with pressure measuring equipment or a power supply. The gear 7 is driven to rotate by the speed reducer motor 10 to drive the rack 8 to move forwards and backwards along the axial direction, so that the substrate 2 can move forwards and backwards axially, and the single probe 13 can finish flow field measurement on different positions of the central axis of the test section.
Example 2
The embodiment is an application mode when the front end of the device is provided with a measuring bent.
As shown in fig. 7, in this embodiment, five probes 13 are installed on a measurement bent frame 14 at the same interval, the measurement bent frame 14 is fixedly connected with the head installation interface 1, and a pressure measurement pipeline or power line extends to the rear side of the device through a wiring groove 11 and a pipeline groove 12 of the axially movable substrate 2, extends out of the test section through a wiring groove at the rear side of the wind tunnel bending mechanism, and is connected with a pressure measurement device or a power supply. The gear 7 is driven to rotate by the speed reducer motor 10 to drive the rack 8 to move forwards and backwards along the axial direction, so that the substrate 2 is axially moved forwards and backwards, and the five probes 13 arranged on the measuring bent 14 can realize flow field measurement at different positions in a certain area of the test section.
Although the embodiments of the present invention have been disclosed above, it is not limited to the use listed in the specification and the embodiments, but it can be fully applied to various fields suitable for the present invention. Further modifications and adaptations may readily be made by those skilled in the art without departing from the principles of the present invention, and thus the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (9)
1. The wind tunnel flow field movement measuring device is characterized by comprising a fixed part, a driving part and a moving part;
the fixed part comprises a curved knife connecting bracket (4), a rear cover plate (6) and a speed reducer seat (9); the bending knife connecting bracket (4) is fixed on the wind tunnel bending knife mechanism, the wind tunnel incoming flow direction is taken as the front, a horizontal rear cover plate (6) is fixed on the upper surface of the rear end of the bending knife connecting bracket (4), and a horizontal speed reducer seat (9) is fixed on the lower surface of the rear end of the bending knife connecting bracket;
the driving part comprises a speed reducer motor (10) and a gear (7), the speed reducer motor (10) is positioned at the rear of the curved knife connecting bracket (4), and an output shaft of the speed reducer motor (10) vertically penetrates out of the speed reducer base (9) through a bearing fixed in the speed reducer base (9) and is fixedly connected with the gear (7) positioned above the speed reducer base (9);
the moving part comprises an axial moving base plate (2), an axial moving base plate cover plate (3) and a rack (8); the axial moving base plate (2) and the axial moving base plate cover plate (3) are elongated battens; a head mounting interface (1) is arranged at the front end of the axial moving base plate (2); the inner side surface of a curved knife connecting bracket (4) facing the axial moving substrate (2) is provided with a wiring groove (11) at the front section, and the surface is covered with an axial moving substrate cover plate (3); a pipeline groove (12) communicated with the wiring groove (11) is formed in the upper surface of the rear section of the axial moving base plate (2), and a front cover plate (5) is arranged on the upper surface of the pipeline groove (12); an isolation slit is arranged between the upper surface of the front cover plate (5) and the lower surface of the rear cover plate (6); a rack (8) engaged with the gear (7) is installed at the lower part of the axial moving base plate (2);
the speed reducer motor (10) drives the gear (7), the gear (7) is meshed with the rack (8) to move forwards, and the rack (8) drives the axially moving substrate (2) to move forwards and backwards along the axial direction of the central axis of the wind tunnel;
the central axis of the head mounting interface (1) coincides with the central axis of the wind tunnel.
2. The wind tunnel flow field movement measurement device according to claim 1, wherein the height of the isolation slit is greater than or equal to the depth of the duct slot (12).
3. The wind tunnel flow field movement measuring device according to claim 1, wherein the front end windward side of the head mounting interface (1) is subjected to pneumatic modification.
4. The wind tunnel flow field movement measurement device according to claim 1, wherein the head mounting interface (1) is provided with a single total static pressure probe, a multi-hole probe, a hot wire anemometer, a measurement bent or a test model.
5. The wind tunnel flow field movement measuring device according to claim 1, wherein the outer side surface of the axial movement base plate (2) is gradually expanded from front to back, and is subjected to pneumatic modification.
6. The wind tunnel flow field movement measurement device according to claim 1, wherein the axial movement base plate (2) and the axial movement base plate cover plate (3) are fixedly connected by screws arranged in series.
7. The wind tunnel flow field movement measurement device according to claim 1, wherein the inner side surface of the curved knife connecting bracket (4) facing the axially movable substrate cover plate (3) is provided with a square groove, the assembly of the axially movable substrate (2) and the axially movable substrate cover plate (3) moves back and forth in the square groove, and the square groove has the double functions of limiting and sliding tracks.
8. The wind tunnel flow field movement measuring device according to claim 1, wherein the back cover plate (6) is internally provided with a hole for weight reduction.
9. The wind tunnel flow field movement measuring device according to claim 1, wherein the length of the rack (8) is greater than or equal to the length of the uniform area of the wind tunnel flow field.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110268724.4A CN113029505B (en) | 2021-03-12 | 2021-03-12 | Wind tunnel flow field mobile measurement device |
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| CN202110268724.4A CN113029505B (en) | 2021-03-12 | 2021-03-12 | Wind tunnel flow field mobile measurement device |
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| CN113029505A CN113029505A (en) | 2021-06-25 |
| CN113029505B true CN113029505B (en) | 2023-07-04 |
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| CN114518212B (en) * | 2022-04-20 | 2022-06-28 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Simple device for realizing large-range flow field displacement measurement in limited space |
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| CN113029505A (en) | 2021-06-25 |
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