CN110672299A - Blade angle measuring and adjusting device based on ducted tail rotor wind tunnel test - Google Patents
Blade angle measuring and adjusting device based on ducted tail rotor wind tunnel test Download PDFInfo
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- CN110672299A CN110672299A CN201911080794.6A CN201911080794A CN110672299A CN 110672299 A CN110672299 A CN 110672299A CN 201911080794 A CN201911080794 A CN 201911080794A CN 110672299 A CN110672299 A CN 110672299A
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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
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B5/00—Measuring arrangements characterised by the use of mechanical techniques
- G01B5/24—Measuring arrangements characterised by the use of mechanical techniques for measuring angles or tapers; for testing the alignment of axes
Abstract
The invention aims to provide a blade angle measuring and adjusting device based on a ducted tail rotor wind tunnel test, which comprises a fixed disc, a measuring table and a rotary disc, wherein the fixed disc is fixedly connected with a hub, the measuring table and the fixed disc are mutually vertically and fixedly connected, a circular groove is arranged in the measuring table, the rotary disc is arranged in the circular groove and can rotate in the circular groove, a hollowed groove is formed in the rotary disc by taking a rotating shaft of a blade as the center of a circle, and the blade can penetrate through the groove; the surface of the rotary table is radially provided with a slide way, a paddle angle fixing piece is arranged in the slide way, and the paddle angle fixing piece is fixed after the position of the paddle angle fixing piece is adjusted in the slide way, so that the relative position of the paddle and the rotary table is fixed; and the measuring table and the circular arc corresponding to the rotary table are uniformly provided with scale marks. The device can accurately measure the angle change of the blade angle, provides test basis for blade angle adjustment, and meets test requirements, thereby realizing the test research of the aerodynamic characteristics of the wind tunnel duct tail rotor.
Description
Technical Field
The invention belongs to the field of wind tunnel special test device design, and particularly relates to a blade angle measuring and adjusting device based on a ducted tail rotor wind tunnel test.
Background
The conventional tail rotor has the advantages of relatively simple structure, high weight efficiency, mature technology and the like. However, with the development of engineering application, various advanced designs, materials, processes and technologies are continuously adopted to carry out innovation on the basis of the original mature technology, so that the performance index of the composite material is continuously improved. Ducted tail rotors use more blades, rotate at higher speeds and have a lower noise/vibration level than conventional tail rotors, with the tips not exposed. The ducted tail rotor has the technical advantages and characteristics of high efficiency, good safety, low noise level and the like, so that the ducted tail rotor is adopted in various helicopter models at present. Foreign related companies also continuously improve the arrangement form of the ducted tail rotor, including the non-uniform arrangement of the blades, the increase of the chord length of the blades and the like, so as to further improve the performance and reduce the noise. Because the tail rotor is positioned in the downwash airflow of the main rotor, the pneumatic environment is very complex, and the design only through theoretical calculation may have larger errors, which easily causes the repetition of model development work, the wind tunnel test is a main research means of the design of the tail rotor, and the test research of the pneumatic/noise characteristics of the wind tunnel ducted tail rotor needs to be carried out.
In the wind tunnel duct tail rotor test, the blade angle measuring and adjusting device is the basis for carrying out the duct tail rotor test, thereby realizing the analysis of the influence of duct tail rotor parameters on pneumatic and acoustic characteristics, providing reliable test verification data for the duct tail rotor design scheme, and needing the blade angle measuring and adjusting device which can accurately measure the angle change of the blade angle and meet the test requirements at the same time.
Disclosure of Invention
The invention aims to provide a blade angle measuring and adjusting device based on a ducted tail rotor wind tunnel test, which can accurately measure the angle change of a blade angle, provide a test basis for blade angle adjustment and meet test requirements, thereby realizing wind tunnel ducted tail rotor pneumatic characteristic test research.
The technology adopted by the invention is as follows: a blade angle measuring device based on ducted tail rotor wind tunnel test comprises a fixed disc, a measuring table and a rotary disc, wherein the fixed disc is fixedly connected with a propeller hub, the measuring table and the fixed disc are mutually perpendicular and fixedly connected, a circular groove is formed in the measuring table, the rotary disc is installed in the circular groove and can rotate in the circular groove, a hollowed groove is formed in the rotary disc by taking a rotating shaft of a blade as a center of a circle, and the blade can penetrate through the groove; the surface of the rotary table is radially provided with a slide way, a paddle angle fixing piece is arranged in the slide way, and the paddle angle fixing piece is fixed after the position of the paddle angle fixing piece is adjusted in the slide way, so that the relative position of the paddle and the rotary table is fixed; and the measuring table and the circular arc corresponding to the rotary table are respectively provided with scale marks.
The invention also has the following technical characteristics:
1. the measuring table consists of a lower measuring table and an upper measuring table, the upper measuring table is fixedly connected on the lower measuring table, and the lower measuring table is vertically and fixedly connected with the fixed disc; corresponding semicircular grooves are formed in the lower measuring table and the upper measuring table, so that the whole circular groove is formed.
2. The carousel constitute by measuring the calibrated scale and measuring the fixed disk, the measuring calibrated scale and measuring the fixed disk be two corresponding semi-circles, measuring fixed disk fixed connection on measuring the calibrated scale, and then install in the circular recess of the inside formation of measuring desk and last measuring desk down to can be at this circular recess internal rotation, measuring calibrated scale and measuring the fixed disk and use the paddle pivot to open the groove that has the fretwork as the centre of a circle, it has the slide to measure the radial division of fixed disk surface, installs paddle angle mounting in this slide.
3. The projection of the outer contour of the fixed disc is determined to be a polygon according to the number of the blades.
The device has higher positioning precision, can accurately measure the angle change of the blade angle, provides basis for the adjustment of the blade angle, has strong operability, is applied to duct tail rotor wind tunnel tests, and is stable in operation and convenient to install and disassemble.
Drawings
FIG. 1 is a top view of the structure of a fixed disk and a measuring table;
FIG. 2 is a front view of the principle structure of the device;
fig. 3 is a front view of the structure of the device during the test.
The device comprises a fixed disc, a lower measuring table, an upper measuring table, a measuring dial, a measuring fixed disc, a blade angle fixing piece, a blade hub, a blade and blades, wherein the fixed disc is 1, the lower measuring table is 2, the upper measuring table is 3, the measuring dial is 4, the measuring fixed disc is 5, the blade angle fixing piece is 6, and the blade hub is.
Detailed Description
The technical scheme of the invention is further explained by taking the following specific implementation examples in combination with the drawings of the specification.
Example 1
As shown in fig. 1-3, a blade angle measuring device based on ducted tail rotor wind tunnel test comprises a fixed disk, a measuring table and a rotary disk, wherein the fixed disk is fixedly connected with a hub, the measuring table is vertically and fixedly connected with the fixed disk, a circular groove is arranged in the measuring table, the rotary disk is arranged in the circular groove, has proper dimensional tolerance fit and can rotate in the circular groove, a hollowed groove is formed in the rotary disk by taking a rotating shaft of a blade as a center of a circle, and the blade can pass through the groove; the surface of the rotary table is radially provided with a slide way, a paddle angle fixing piece is arranged in the slide way, and the paddle angle fixing piece is fixed after the position of the paddle angle fixing piece is adjusted in the slide way, so that the relative position of the paddle and the rotary table is fixed; the measuring table and the circular arc corresponding to the rotary table are provided with scale marks, and the division value can be determined according to the actual measurement precision requirement.
Example 2
As shown in fig. 1-3, a blade angle measuring device based on ducted tail rotor wind tunnel test comprises a fixed disk, a measuring table and a rotary disk, wherein the fixed disk is fixedly connected with a hub, the fixed disk is matched with a spigot of a front hub, keys are positioned, weight reducing holes are formed in the fixed disk, the measuring table is vertically and fixedly connected with the fixed disk, the measuring table consists of a lower measuring table and an upper measuring table, the lower measuring table is vertically and fixedly connected with the fixed disk, the upper measuring table is fixedly connected to the upper surface of the lower measuring table, and corresponding semicircular grooves are formed in the lower measuring table and the upper measuring table, so that a whole circle is formed and a circular groove is formed. And scale marks are arranged on the circular arc of the lower measuring table. The carousel constitute by measuring the calibrated scale and measuring the fixed disk, measure the calibrated scale and measure the fixed disk and be two semi-circular that correspond, measurement fixed disk fixed connection on measuring the calibrated scale, and then install in the circular recess of the inside formation of measuring stand and last measuring stand down, and can rotate at above-mentioned circular recess, it has the groove of fretwork to measure the calibrated scale and measure the fixed disk and use the paddle pivot as centre of a circle in the middle of, the paddle can pass this groove, it has the slide to measure the fixed disk surface and radially open, install paddle angle mounting in this slide, paddle angle mounting adjusts in the slide, make the lateral wall profile on the paddle angle mounting coincide completely with the paddle profile, later pass through the fix with screw, thereby it is fixed with the relative position of carousel to be with the paddle. And scale marks are arranged on the circular arc of the measuring dial. The projection of the outer contour of the fixed disc is determined to be a polygon according to the number of the blades. The division value of the graduation line can be determined according to the actual measurement precision requirement.
Example 3
As shown in fig. 1-3, the test mode is as follows: the fixed disk is provided with an interface connected with the front section of the propeller hub, and the fixed disk is fixedly arranged on the front section of the propeller hub. The fixed disk is also provided with an interface connected with the lower measuring table, and the lower measuring table is fixedly arranged on the fixed disk and corresponds to the position of the blade to be measured and adjusted. The upper measuring table is connected with the lower measuring table, the measuring dial disc is placed in the circular groove along the outer profile of the blade, the measuring fixed disc with the blade angle fixing piece is installed together with the measuring dial disc, the relative position of the rotating disc is adjusted, the side wall profile on the blade angle fixing piece is completely matched with the blade profile, and the position of the blade angle fixing piece is fixed. The sight is perpendicular to the measuring dial, and the angle of the paddle can be read. The blade, the measuring dial disc and the measuring fixed disc are rotated together to reach the pre-reached angle, and the blade is fixed, so that the purpose of adjusting the blade angle can be achieved.
Claims (4)
1. The utility model provides a blade angle measuring device based on duct tail-rotor wind tunnel test, includes fixed disk, test table and carousel, fixed disk and propeller hub fixed connection, its characterized in that: the measuring table is vertically and fixedly connected with the fixed disc, a circular groove is formed in the measuring table, the rotary disc is installed in the circular groove and can rotate in the circular groove, a hollowed groove is formed in the rotary disc by taking the rotating shaft of the blade as the center of a circle, and the blade can penetrate through the groove; the surface of the rotary table is radially provided with a slide way, a paddle angle fixing piece is arranged in the slide way, and the paddle angle fixing piece is fixed after the position of the paddle angle fixing piece is adjusted in the slide way, so that the relative position of the paddle and the rotary table is fixed; and the measuring table and the circular arc corresponding to the rotary table are respectively provided with scale marks.
2. The blade angle measuring device based on the ducted tail rotor wind tunnel test according to claim 1, characterized in that: the measuring table consists of a lower measuring table and an upper measuring table, the upper measuring table is fixedly connected on the lower measuring table, and the lower measuring table is vertically and fixedly connected with the fixed disc; corresponding semicircular grooves are formed in the lower measuring table and the upper measuring table, so that the whole circular groove is formed.
3. The blade angle measuring device based on the ducted tail rotor wind tunnel test according to claim 2, characterized in that: the carousel constitute by measuring the calibrated scale and measuring the fixed disk, the measuring calibrated scale and measuring the fixed disk be two corresponding semi-circles, measuring fixed disk fixed connection on measuring the calibrated scale, and then install in the circular recess of the inside formation of measuring desk and last measuring desk down to can be at this circular recess internal rotation, measuring calibrated scale and measuring the fixed disk and use the paddle pivot to open the groove that has the fretwork as the centre of a circle, it has the slide to measure the radial division of fixed disk surface, installs paddle angle mounting in this slide.
4. The blade angle measurement adjusting device based on the ducted tail rotor wind tunnel test according to any one of claims 1 to 3, characterized in that: the projection of the outer contour of the fixed disc is determined to be a polygon according to the number of the blades.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911080794.6A CN110672299A (en) | 2019-11-07 | 2019-11-07 | Blade angle measuring and adjusting device based on ducted tail rotor wind tunnel test |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911080794.6A CN110672299A (en) | 2019-11-07 | 2019-11-07 | Blade angle measuring and adjusting device based on ducted tail rotor wind tunnel test |
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| CN110672299A true CN110672299A (en) | 2020-01-10 |
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| CN201911080794.6A Pending CN110672299A (en) | 2019-11-07 | 2019-11-07 | Blade angle measuring and adjusting device based on ducted tail rotor wind tunnel test |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111319789A (en) * | 2020-04-09 | 2020-06-23 | 中国空气动力研究与发展中心低速空气动力研究所 | Full-size propeller blade icing wind tunnel test method |
| CN112857736A (en) * | 2021-01-11 | 2021-05-28 | 中国空气动力研究与发展中心超高速空气动力研究所 | Test method for obtaining influence of flow field nonuniformity on model aerodynamic characteristics |
| CN112960140A (en) * | 2021-03-15 | 2021-06-15 | 中国商用飞机有限责任公司 | Horizontal tail trim angle adjusting device |
| CN113959373A (en) * | 2021-10-25 | 2022-01-21 | 中国航空工业集团公司北京长城计量测试技术研究所 | Paddle radial corner measuring device |
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| CN209157557U (en) * | 2018-10-31 | 2019-07-26 | 台州市椒江永固船舶螺旋桨厂 | A kind of blade angle regulating device of propeller |
| CN110186370A (en) * | 2019-04-30 | 2019-08-30 | 中国航发南方工业有限公司 | Blade angle measurement sensor dynamic test equipment and method |
| CN209416256U (en) * | 2019-03-06 | 2019-09-20 | 北京京东尚科信息技术有限公司 | Propeller blade calibrating installation and propeller blade calibration system |
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Patent Citations (8)
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| EP1845873B1 (en) * | 2005-01-21 | 2014-01-22 | Sikorsky Aircraft Corporation | Rotor blade cuff measuring tool and method |
| CN106247886A (en) * | 2016-08-26 | 2016-12-21 | 中航动力股份有限公司 | A kind of detection device for large-scale fan integrated impeller blade and detection method |
| CN206177207U (en) * | 2016-11-04 | 2017-05-17 | 珠海市和裕丰船舶设备有限公司 | Pitchometer |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111319789A (en) * | 2020-04-09 | 2020-06-23 | 中国空气动力研究与发展中心低速空气动力研究所 | Full-size propeller blade icing wind tunnel test method |
| CN112857736A (en) * | 2021-01-11 | 2021-05-28 | 中国空气动力研究与发展中心超高速空气动力研究所 | Test method for obtaining influence of flow field nonuniformity on model aerodynamic characteristics |
| CN112857736B (en) * | 2021-01-11 | 2022-04-12 | 中国空气动力研究与发展中心超高速空气动力研究所 | Test method for obtaining influence of flow field nonuniformity on model aerodynamic characteristics |
| CN112960140A (en) * | 2021-03-15 | 2021-06-15 | 中国商用飞机有限责任公司 | Horizontal tail trim angle adjusting device |
| CN113959373A (en) * | 2021-10-25 | 2022-01-21 | 中国航空工业集团公司北京长城计量测试技术研究所 | Paddle radial corner measuring device |
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