CN113959373A - Paddle radial corner measuring device - Google Patents
Paddle radial corner measuring device Download PDFInfo
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- CN113959373A CN113959373A CN202111241277.XA CN202111241277A CN113959373A CN 113959373 A CN113959373 A CN 113959373A CN 202111241277 A CN202111241277 A CN 202111241277A CN 113959373 A CN113959373 A CN 113959373A
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- paddle
- fixed shaft
- driving plate
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- 238000005259 measurement Methods 0.000 claims abstract description 22
- 238000009434 installation Methods 0.000 claims description 10
- 241000755266 Kathetostoma giganteum Species 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 238000001179 sorption measurement Methods 0.000 claims description 5
- 230000000694 effects Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract 1
- 229910001172 neodymium magnet Inorganic materials 0.000 description 3
- 230000003068 static effect Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000000670 limiting effect Effects 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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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
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/26—Measuring arrangements characterised by the use of optical techniques for measuring angles or tapers; for testing the alignment of axes
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
Abstract
The invention relates to a device for measuring the radial rotation angle of a blade, which is used for measuring and recording the rotation angle corresponding to the radial direction of the blade when the torque of the blade is measured, and belongs to the field of geometric quantity measurement. The device utilizes the fixed shaft to match with the blade moment measuring device, utilizes the rotary drive plate to install the circular grating ruler for angle measurement, and the reading head is installed at the fixed shaft end, thereby ensuring the radial structural symmetry of the rotary part of the device. The rotating drive plate is used for positioning and clamping the blades, and a symmetrical structure is designed, so that additional torque brought to the device in the rotating process is avoided. The original position angle control is carried out by utilizing the rotary driving plate and a group of magnets with seats of the fixed shaft, so that the consistency of the initial measurement angle after the clamping of different blades is ensured, and the repeatability of angle measurement is ensured. The gap required by clamping and the small angle difference generated during positive and negative rotation switching are eliminated by utilizing the spring plunger, so that the accuracy of blade angle measurement is ensured.
Description
Technical Field
The invention relates to a device for measuring the radial rotation angle of a blade, belonging to the field of angle measurement in the field of geometric measurement.
Background
The propeller engine is composed of a plurality of blades, and blades with axial and radial torque values in the same range need to be selected during assembly so as to ensure the performance of the engine. Because the blade is an asymmetric special spiral structure in the radial direction, the radial moment values corresponding to different rotation angle directions are different. Therefore, when measuring the radial moment of the blade, the corresponding rotation angle value of the blade needs to be determined.
Currently, the angle measurement of the blade is mainly performed by adding a measuring device on the outer side of the blade. Direct measurement is carried out by using angle measuring equipment such as a running rule, a bubble level meter and the like through approaching a measured profile of the blade; the rotation angle of the paddle is converted into distance parameters through a switching device by using a turntable, a cam, a link mechanism and the like, and then converted to be indirectly measured. For both measurement modes, direct measurement of the angle of rotation of the blade about its axis cannot be achieved; meanwhile, the read precision of the guiding rule and the indicating scale of the level gauge is limited, the human error is high, and the indirect measurement brings extra measurement error and uncertainty in the conversion, so that a high-precision measurement result is difficult to obtain.
Disclosure of Invention
The invention discloses a device for measuring the radial rotation angle of a blade, aiming at solving the problems that the existing blade has low angle measurement precision and can not directly measure the angle of the blade rotating around the axis of the blade, and aiming at providing a high-precision measuring device capable of directly reading the rotation angle of the blade for measuring the torque of the blade.
The purpose of the invention is realized by the following technical scheme:
a paddle radial rotation angle measuring device is a measuring device which is integrally fixed on different instruments through a fixed shaft; the rotary driving plate with the circular grating ruler is connected with the fixed shaft through a bearing; the grating reading head is arranged at the upper end of the fixed shaft and is opposite to the graduation lines of the circular grating ruler; the magnet with the seat is fixed at the lower end of the fixed shaft, and the flat head bolt stop seat magnet is fixed on the rotary driving plate to form a magnetic suction rotary positioning component; and a spring plunger is arranged on a paddle mounting hole of the rotary driving plate and used for eliminating a paddle mounting gap.
The fixed shaft is a fixed part of the blade radial rotation angle measuring device, and a reading head mounting hole and a magnet mounting hole with a seat are formed in the flange end of the fixed shaft; the length of the mounting end meets the requirements of mounting the bearing and the rotary drive plate. The fixed shaft flange can be fixed on a rotating axis of the torque measuring instrument or other measuring instruments with flange mounting holes through bolts.
The rotary driving plate is a main moving part of the device and is connected with the mounting end of the fixed shaft through interference fit by two groups of rolling bearings. The inner side of the rotary driving plate is provided with a grating ruler mounting flange and a threaded hole for mounting a magnet with a seat, and a mounting pin hole of a conical paddle is reserved on the outer side. The diameter of the mounting pin hole is slightly larger than the diameter of the blade pin, and a slope guide groove is arranged, so that the blade can be conveniently clamped. The spring plunger with threads is arranged on the central side section of the mounting pin hole, so that the auxiliary fixing effect on the paddle is achieved, and mounting gaps and angle errors of positive and negative rotation conversion are eliminated. In order to enable the gravity center of the rotary driving plate to be located on the rotating axis of the torque measuring instrument, the position, opposite to the mounting pin hole, of the rotary driving plate is hollowed out, and the same weight is reduced, so that additional radial torque is avoided.
The angle measuring element consists of a circular grating ruler and a reading head, wherein the circular grating ruler is arranged on a flange on the inner side of the rotary driving plate and rotates synchronously along with the rotation of the paddle. The reading head is arranged in a mounting hole reserved in the fixed shaft, and a gap capable of reading is kept between the reading head and the grating ruler after the reading head is mounted.
The magnetic rotary positioning component consists of a group of magnets with seats. The stop seat magnet with the flat-head bolt is arranged on the inner side of the rotary driving plate and is positioned in the magnet seat. The cylindrical seat magnet with the bolt hole is arranged at the corresponding position of the threaded hole reserved in the fixed shaft. The magnet seat package can avoid magnet and near other components to produce the adsorption affinity and influence the measuring result. When the rotary driving plate rotates to the position corresponding to the magnet, the rotation can be automatically stopped due to the magnet adsorption force, so that the consistency of the initial angle of the same blade during clamping at every time or different blades is ensured, and the repeatability of the blade measuring result is favorably improved.
The working mode of the device is as follows:
before the paddle is installed, the rotary drive plate corresponds to the magnet on the fixed shaft, and the initial angle of the device is determined. The paddle is installed in the pin hole reserved by the rotary driving plate, the spring plunger on the inner side of the pin hole is extruded by the paddle pin, and the spring in the spring plunger can generate thrust to fix the paddle on the other inner side surface of the pin hole, so that the installation gap is eliminated. Then the paddle is rotated to drive the rotary driving plate to rotate. And reading the initial angle of the grating ruler on the rotary drive plate and the angle after the rotation is finished through the reading head to obtain the rotation angle of the paddle.
Has the advantages that:
1. the device adopts the grating measuring component to measure the rotating angle, and has a higher-precision measuring result compared with the existing measuring means such as a running rule and conversion measurement.
2. The device adopts the spring plunger, eliminates the installation gap between the paddle pin and the rotary drive plate, and eliminates the measurement error generated when the paddle rotates initially and the rotating direction is switched.
3. The device adopts a group of magnets with seats to ensure the consistency of initial angles of the same blade during clamping at each time or different blades during clamping so as to ensure the repeatability of blade measurement results.
Drawings
FIG. 1 is a schematic view of the structure composition and use of a device for measuring the radial rotation angle of a blade;
FIG. 2 is a schematic structural diagram of a blade radial rotation angle measuring device;
fig. 3 is an isometric view of a blade radial rotation angle measuring device.
Reference numerals:
1-a fixed shaft; 2-a circular grating ruler; 3-a rotary dial; 4-a main beam; 5-an inner positioning ring; 6-axial locking device; 7-an outer positioning ring; 8-a central sleeve; 9-a bearing; 10-grating ruler reading head; 11-a spring plunger; 12-flat head bolt stop seat magnet; 13-a seated magnet; 14-center of the blade of the moment measuring instrument; 15-paddle location surface; 16-blade to be tested.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples. The technical problems and the advantages solved by the technical solutions of the present invention are also described, and it should be noted that the described embodiments are only intended to facilitate the understanding of the present invention, and do not have any limiting effect.
As shown in figure 1, the blade radial rotation angle measuring device is installed on a main beam 4 of a torque measuring instrument through a fixed shaft 1, and the flange ensures that the axis of the fixed shaft is consistent with the rotation center of the blade and the blade center 14 of the torque measuring instrument. The grating scale reading head 10 and the magnet with holder 13 shown in fig. 2 are mounted on the fixed shaft 1. After the fixed shaft is installed, the rotary dial 3, the circular grating ruler 2 assembled on the rotary dial, the bearing 9, the spring plunger 11 shown in figure 2 and the magnet 12 with the flat head bolt stop seat are installed on the fixed shaft. The inner positioning ring 5 and the central sleeve 8 are fixed on the main beam 4 of the torque measuring instrument through flanges. The axial locking device 6 and the outer positioning ring 7 are arranged on the central sleeve 8, the axial locking device is used for preventing the measured blade from being separated from the instrument, and the outer positioning ring 4 is used for ensuring the relative position of the blade positioning surface 15 and the measuring instrument so as to ensure that the rotation center of the blade coincides with the center of the blade of the torque measuring instrument.
The rotary dial 3 is the main moving part of the device and is installed by two groups of rolling bearings 9 and the fixed shaft 1 in an interference fit manner. The inside of the rotary driving plate 3 is provided with a mounting flange of the circular grating ruler 2, a mounting pin hole of the paddle is reserved on the outside, the diameter of the mounting pin hole is 3mm larger than that of the paddle, the mounting pin hole is horn-shaped, and the paddle can be conveniently positioned and mounted. A threaded spring plunger 11 is installed in a threaded hole in the central side section of the pin hole through a bolt, the movable stroke of the spring plunger 11 along the central axis of the pin hole is 5mm, the auxiliary fixing effect on the blade during installation and rotation of the blade is achieved, and installation gaps and angle errors of positive and negative rotation conversion are eliminated. The inner side of the rotary dial 3 is also provided with a mounting threaded hole of a magnet with a seat 13. In order to enable the gravity center of the rotary driving plate 13 to be located on the rotating axis of the torque measuring instrument, the position of the rotary driving plate 13 corresponding to the pin hole is hollowed out, and materials with the same size as the pin hole are hollowed out to reduce the same weight so as not to generate radial additional torque.
The angle measuring element consists of a circular grating ruler 2 and a grating reading head 10, wherein the circular grating ruler 2 is arranged on a flange on the inner side of the rotary driving plate 3 through bolts and rotates synchronously along with the rotation of the paddle 16 to be measured. The grating reading head 10 is fixed in a mounting hole reserved on the fixed shaft 3 through a bolt, and a gap (0.8 +/-0.015) mm is kept between the grating reading head and the rotary circular grating ruler 2 after the grating reading head is mounted.
The magnetic rotary positioning component consists of a group of neodymium magnets with seats. The flat head bolt stop seat circular neodymium magnet 12 is arranged on the inner side of the rotary drive plate 3 through bolts, the magnet is positioned in the magnet seat, the magnetic pole S is the surface, and the magnetic pole N is the back. The cylindrical neodymium magnet 13 with bolt hole is installed at the corresponding position of the threaded hole left on the fixed shaft, the magnetic pole N is the surface, and the magnetic pole S is the back. The magnet seat package can avoid magnet and near other components to produce the adsorption affinity and influence the measuring result. When the rotary driving plate 3 rotates to the position corresponding to the magnet, the rotation can be automatically stopped due to the attraction of the magnet, so that the consistency of the initial angle of the same blade during clamping at every time or different blades is ensured, and the repeatability of the blade measuring result is favorably improved.
Before the paddle 16 to be tested is installed each time, the rotary driving plate 3 needs to be rotated to the position where the magnet groups coincide, the radial rotating angles of the rotary driving plate 3 and the fixed shaft 1 are kept consistent during installation, and the influence of moment measurement repeatability caused by different installation angles is eliminated.
When the device is installed, the front end of the paddle 16 is inclined downwards and enters the pin hole from the reserved guide groove of the rotary drive plate 3, and after the paddle pin is overlapped with the plane of the front end of the pin hole, the paddle is naturally in a horizontal position. After the paddle pin enters, the spring plunger 11 is subjected to extrusion force, and the paddle pin is automatically pressed to one side of the pin hole, so that a clamping installation gap is eliminated. After the blade pin is fixed, the blade is pushed forwards to ensure that the blade positioning surface is contacted with the lower positioning ring 7, and meanwhile, the axial locking device 6 is put down to fix the axial movement of the root part of the blade.
And after the blade is clamped, reading the rotation angle, and measuring the radial static moment of the blade. And then, manually rotating the paddle to a certain angle, recording the angle value displayed by the reading head 10, and then measuring the static moment of the paddle corresponding to the angle value. The slight angular difference generated when the paddle forward and reverse rotation is switched is eliminated by the pressing force of the spring plunger 11 against the paddle pin. After the moment value of the required angle is measured, the axial locking device 6 is lifted, and the blade is pulled out backwards. After the measurement is finished, the dial plate can be rotated to the action position of the magnet, and the initial position is recovered to wait for the next measurement.
The above detailed description is intended to illustrate the objects, aspects and advantages of the present invention, and it should be understood that the above detailed description is only exemplary of the present invention and is not intended to limit the scope of the present invention, and any modifications, equivalents, improvements and the like within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. The utility model provides a paddle radial corner measuring device is one kind and is passed through fixed axle monolithic stationary, can be used to measuring device on different instruments which characterized in that: the rotary driving plate with the circular grating ruler is connected with the fixed shaft through a bearing; the grating reading head is arranged at the upper end of the fixed shaft and is opposite to the graduation lines of the circular grating ruler; the magnet with the seat is fixed at the lower end of the fixed shaft, and the flat head bolt stop seat magnet is fixed on the rotary driving plate to form a magnetic suction rotary positioning component; and a spring plunger is arranged on a paddle mounting hole of the rotary driving plate and used for eliminating a paddle mounting gap.
2. A blade radial rotation angle measuring device according to claim 1, wherein: the fixed shaft is a fixed part of the blade radial rotation angle measuring device, a reading head mounting hole and a magnet mounting hole with a seat are formed in the flange end of the fixed shaft, and the length of the mounting end meets the requirements for mounting a bearing and a rotary driving plate; the fixed shaft flange can be fixed on a rotating axis of the torque measuring instrument or other measuring devices with flange mounting positions through bolts.
3. A blade radial rotation angle measuring device according to claim 1, wherein: the rotary driving plate is a main moving part of the device and is connected with the mounting end of the fixed shaft through interference fit by two groups of rolling bearings; the inner side of the rotary driving plate is provided with an original grating ruler mounting flange and a threaded hole for mounting a magnet with a seat; the outer side is reserved with a conical mounting pin hole of the blade, the diameter of the mounting pin hole is slightly larger than the diameter of the blade pin, and a slope guide groove is matched, so that the blade is convenient to clamp; the section of the center side of the pin hole is provided with a spring plunger with threads, so that the auxiliary fixing effect on the paddle is achieved, and the installation gap and the angle error of positive and negative rotation conversion are eliminated; in order to ensure that the gravity center of the rotary driving plate is positioned on the rotating axis of the installed measuring instrument, the position, opposite to the installation pin hole, on the rotary driving plate is hollowed out, and the same weight is reduced, so that additional radial moment is avoided.
4. A blade radial rotation angle measuring device according to claim 1, wherein: the angle measuring element consists of a circular grating ruler and a reading head, wherein the circular grating ruler is arranged on a flange on the inner side of the rotary driving plate and rotates synchronously along with the rotation of the paddle; the reading head is arranged in a mounting hole reserved in the fixed shaft, and a gap capable of reading is kept between the reading head and the rotating grating ruler after the reading head is mounted.
5. A blade radial rotation angle measuring device according to claim 1, wherein: the magnetic rotary positioning component consists of a group of magnets with seats; the magnet with the flat-head bolt stop seat is arranged on the inner side of the rotary drive plate, the magnet is positioned in the magnet seat, the magnetic pole S is the surface, and the magnetic pole N is the back surface; the cylindrical seat magnet with the bolt hole is arranged at the corresponding position of a threaded hole reserved in the fixed shaft, the magnetic pole N is the surface, and the magnetic pole S is the back; the magnet seat is wrapped, so that the influence of the adsorption force generated by the magnet and other adjacent elements on the measurement result can be avoided; when the rotary driving plate rotates to the position corresponding to the magnet, the rotation can be automatically stopped due to the magnet adsorption force, so that the consistency of the initial angle of the same blade in clamping at each time and in clamping different blades is ensured, and the repeatability of the measuring result is improved.
6. A blade radial rotation angle measuring device according to claim 1, wherein: the working mode of the device is as follows:
before the paddle is installed, the rotary drive plate corresponds to the magnet on the fixed shaft, and the initial angle of the device is determined. The paddle is installed in the pin hole reserved by the rotary driving plate, the spring plunger on the inner side of the pin hole is extruded by the paddle pin, and the spring in the spring plunger can generate thrust to fix the paddle on the other inner side surface of the pin hole, so that the installation gap is eliminated. Then the paddle is rotated to drive the rotary driving plate to rotate. And reading the initial angle of the grating ruler on the rotary drive plate and the angle after the rotation is finished through the reading head to obtain the rotation angle of the paddle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111241277.XA CN113959373A (en) | 2021-10-25 | 2021-10-25 | Paddle radial corner measuring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111241277.XA CN113959373A (en) | 2021-10-25 | 2021-10-25 | Paddle radial corner measuring device |
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| Publication Number | Publication Date |
|---|---|
| CN113959373A true CN113959373A (en) | 2022-01-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111241277.XA Pending CN113959373A (en) | 2021-10-25 | 2021-10-25 | Paddle radial corner measuring device |
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| CN (1) | CN113959373A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7581330B1 (en) * | 2008-01-29 | 2009-09-01 | Redmond David W | Gauge device for measuring the inner diameter of engine related bores |
| FR2940437A1 (en) * | 2008-12-22 | 2010-06-25 | Airbus France | TOOL, TOOL ASSEMBLY, AND METHOD OF ADJUSTING THE FLANGE OF BLADES OF A MODEL PROPELLER |
| CN102749041A (en) * | 2012-07-13 | 2012-10-24 | 合肥工业大学 | Propeller type surface contour error measurement instrument and method |
| CN107719641A (en) * | 2017-11-03 | 2018-02-23 | 厦门市汉飞鹰航空科技有限公司 | It is a kind of can be with the propeller of stopping a train at a target point |
| CN108981614A (en) * | 2018-06-06 | 2018-12-11 | 大连理工大学 | A kind of device and method measuring spindle rotation error with Circular gratings and autocollimator |
| CN110672299A (en) * | 2019-11-07 | 2020-01-10 | 中国航空工业集团公司哈尔滨空气动力研究所 | Blade angle measuring and adjusting device based on ducted tail rotor wind tunnel test |
| CN111121669A (en) * | 2020-01-19 | 2020-05-08 | 天津大学 | Multifunctional angle calibration device and method used in precision speed reducer detector |
| CN112556548A (en) * | 2020-12-12 | 2021-03-26 | 安徽卓尔航空科技有限公司 | Real-time measuring device for propeller blade angle |
-
2021
- 2021-10-25 CN CN202111241277.XA patent/CN113959373A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7581330B1 (en) * | 2008-01-29 | 2009-09-01 | Redmond David W | Gauge device for measuring the inner diameter of engine related bores |
| FR2940437A1 (en) * | 2008-12-22 | 2010-06-25 | Airbus France | TOOL, TOOL ASSEMBLY, AND METHOD OF ADJUSTING THE FLANGE OF BLADES OF A MODEL PROPELLER |
| CN102749041A (en) * | 2012-07-13 | 2012-10-24 | 合肥工业大学 | Propeller type surface contour error measurement instrument and method |
| CN107719641A (en) * | 2017-11-03 | 2018-02-23 | 厦门市汉飞鹰航空科技有限公司 | It is a kind of can be with the propeller of stopping a train at a target point |
| CN108981614A (en) * | 2018-06-06 | 2018-12-11 | 大连理工大学 | A kind of device and method measuring spindle rotation error with Circular gratings and autocollimator |
| CN110672299A (en) * | 2019-11-07 | 2020-01-10 | 中国航空工业集团公司哈尔滨空气动力研究所 | Blade angle measuring and adjusting device based on ducted tail rotor wind tunnel test |
| CN111121669A (en) * | 2020-01-19 | 2020-05-08 | 天津大学 | Multifunctional angle calibration device and method used in precision speed reducer detector |
| CN112556548A (en) * | 2020-12-12 | 2021-03-26 | 安徽卓尔航空科技有限公司 | Real-time measuring device for propeller blade angle |
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Application publication date: 20220121 |