CN116380337A - Axial force calibration device of squirrel-cage stress ring composite structure - Google Patents
Axial force calibration device of squirrel-cage stress ring composite structure Download PDFInfo
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- CN116380337A CN116380337A CN202310652589.2A CN202310652589A CN116380337A CN 116380337 A CN116380337 A CN 116380337A CN 202310652589 A CN202310652589 A CN 202310652589A CN 116380337 A CN116380337 A CN 116380337A
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- 239000002131 composite material Substances 0.000 title claims abstract description 29
- 241000555745 Sciuridae Species 0.000 claims abstract description 40
- 238000000034 method Methods 0.000 claims abstract description 20
- 239000006185 dispersion Substances 0.000 claims abstract description 19
- 230000008569 process Effects 0.000 claims abstract description 12
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000013016 damping Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 238000012360 testing method Methods 0.000 abstract description 16
- 238000005259 measurement Methods 0.000 abstract description 3
- 230000035882 stress Effects 0.000 description 104
- 238000011160 research Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 230000006870 function Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000013135 deep learning Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
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- 230000000149 penetrating effect Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The invention relates to the technical field of aeroengine axial force measurement, and discloses an axial force calibration device of a squirrel-cage stress ring composite structure, wherein a calibration process can complete two calibration tests under pressure and tensile loading at one time without disassembly and assembly, so that the test flow is simplified, and the test efficiency is improved; after the loading force arm corresponds to the stress loading groove and is positioned, the loading end of the loading force arm extends into the corresponding stress loading groove to realize the fit between the loading end and the stress loading groove, point contact is avoided, and the force exerted on the first pressing plate or the second pressing plate by the loading force arm is more uniform; and the stress loading groove is provided with stress dispersion holes, the stress dispersion holes can be arranged at the stress concentration positions on the stress loading groove, the problem that stress concentration is generated at the bottom of the stress loading groove in the process of loading or simulating the using environment of the squirrel cage stress ring under the heating condition to carry out stress loading calibration can be further avoided, and the safe performance of the test is ensured.
Description
Technical Field
The invention relates to the technical field of aero-engine axial force measurement, and discloses an axial force calibration device of a squirrel-cage stress ring composite structure.
Background
At present, the design application object of the axial force calibration device of the aero-engine is a stress ring, a squirrel cage and other structures; the calibration of the structures such as the stress ring, the squirrel cage and the like is generally single calibration, the assembly state of the actual working condition of the force measuring device for axial force is not fitted, and the actual interaction of the stress ring, the squirrel cage and the squirrel cage-stress ring with other parts is not considered, so that the actual assembly condition of the squirrel cage stress ring force measuring structure cannot be simulated, and the assembly position of the force measuring device, the azimuth of the transmission force and the influence of the path are not considered. The designed assembly calibration device often needs to be disassembled and assembled for multiple times, especially when calibration tests of a squirrel cage-stress ring assembly in a forward state and a reverse state are needed to be carried out.
The research direction at home and abroad is mainly focused on the research of the axial force calibration principle and the improvement of the basic method. The foreign related research content includes: s Hirose, K Yoneda provides a force sensor based on an optical measurement technology and a nonlinear calibration method thereof; HS Oh, U Kim research a multiaxial force/moment sensor calibration method based on deep learning. The domestic related research content is as follows: the China navigation Shenyang aeroengine institute Yuan Xue, ji Haitao and the like invents an aeroengine axial force calibration component (CN 209356120U) which mainly comprises a loading cap, a centering ring and a loading base; the sealing valve, liu Gangwei and the like are designed into a pump axial force balancing device (CN 95239006) for pumps, in particular to a segmental multistage pump, which can improve the stress condition of the pump shaft and prolong the service life of the pump.
In conclusion, the axial force calibration method aiming at the squirrel cage-stress ring force measuring structure of the aero-engine at present does not simulate the real assembly state of the squirrel cage stress ring force measuring integrated structure, and meanwhile, the axial force calibration device with the forward and reverse calibration integrated functions is provided.
Disclosure of Invention
The invention aims to provide an axial force calibration device of a squirrel-cage stress ring composite structure, and the calibration process can finish two calibration tests under compression and tension loading at one time without disassembly and assembly, so that the test flow is simplified, and the test efficiency is improved.
In order to achieve the technical effects, the technical scheme adopted by the invention is as follows:
the axial force calibration device of the squirrel-cage stress ring composite structure comprises a mounting cylinder, wherein a mounting ring and a radial limiting ring are arranged in the mounting cylinder; a squirrel cage stress ring is arranged in the mounting cylinder, one end edge of the squirrel cage stress ring is fixed on the mounting ring, and the outer wall of the squirrel cage stress ring is contacted with the inner wall of the radial limiting ring; the squirrel-cage stress ring is coaxially fixed with a bearing, one end of the bearing inner ring is fixed with a first pressing plate, the other end of the bearing inner ring is fixed with a second pressing plate, the outer side surface of the first pressing plate and the outer side surface of the second pressing plate are respectively provided with a stress loading groove, and the centers of the stress loading grooves are all positioned on the axis of the bearing; and stress dispersion holes are formed in the stress loading groove.
Further, the stress dispersion hole has a cross-sectional area
The value range is +.>
Depth of the stress dispersion holes +.>
The value range is +.>
The method comprises the steps of carrying out a first treatment on the surface of the Wherein (1)>
For the maximum load applied to the first or second pressure plate during calibration, +.>
Yield limit for the first or second pressure plate, +.>
For the coefficient of thermal expansion of the first or second pressure plate,>
for the modulus of elasticity of the first or second pressure plate, < >>
For the maximum temperature change of the first pressure plate or the second pressure plate in the calibration process, +.>
Is the inner diameter of the bearing>
For the first or second pressure plate cross-sectional moment of inertia, < +.>
Is the stress-dispersing hole diameter.
Further, the stress loading groove is an arc-shaped groove, and the stress dispersing hole is formed in the center of the bottom of the arc-shaped groove.
Further, the stress loading groove is a rectangular groove, and the stress dispersing holes are formed in the corner position of the bottom of the rectangular groove.
Further, the first pressing plate and the second pressing plate are in contact with the end face of the inner ring of the bearing, and the first pressing plate is fixedly connected with the second pressing plate through bolts.
Further, a damping ring is arranged between the inner wall of the radial limiting ring and the outer wall of the squirrel cage stress ring.
Further, the heat insulation cover is further included, and a heating assembly and an adjusting bearing platform for placing the mounting cylinder are arranged in the heat insulation cover.
Further, the mounting cylinder comprises a first sleeve, a second sleeve and a third sleeve, the mounting ring is fixed between the first sleeve and the second sleeve, the radial limiting ring is fixed between the second sleeve and the third sleeve, and the first sleeve, the second sleeve and the third sleeve are axially fixed through bolts to form a mounting cylinder integral structure.
Compared with the prior art, the invention has the following beneficial effects:
1. according to the invention, the calibration process can be completed twice under the condition of pressure and tension loading without disassembly and assembly, so that the test flow is simplified, and the test efficiency is improved.
2. In the axial force calibration device, in the process of calibrating the squirrel-cage stress ring composite structure, the loading end of the loading arm extends into the corresponding stress loading groove to realize the fit between the loading end and the stress loading groove, so that point contact is avoided, and the force exerted on the first pressing plate or the second pressing plate by the loading arm is more uniform; and the stress loading groove is provided with stress dispersion holes, the stress dispersion holes can be arranged at the stress concentration positions on the stress loading groove, the problem that stress concentration is generated at the bottom of the stress loading groove in the process of loading or simulating the using environment of the squirrel cage stress ring under the heating condition to carry out stress loading calibration can be further avoided, and the safe performance of the test is ensured.
3. The radial limiting ring is fixedly assembled with the mounting cylinder, and is equivalent to the connection of the radial limiting ring and the casing; the outer wall of the squirrel cage stress ring is contacted with the inner wall of the radial limiting ring, so that the assembly state of the squirrel cage stress ring on an actual engine can be simulated, the actual working state of the squirrel cage stress ring is more similar, and the reliability and the authenticity of calibration data are ensured.
Drawings
FIG. 1 is a schematic structural diagram of an axial force calibration device of a squirrel cage stress ring composite structure in an embodiment;
FIG. 2 is an enlarged schematic view of portion A of FIG. 1;
FIG. 3 is a schematic diagram of axial force calibration under compression of a squirrel cage stress ring composite structure according to an embodiment;
FIG. 4 is a schematic illustration of axial force calibration of a cage stress ring composite structure in tension in an example;
wherein, 1, installing the ring; 2. a radial limiting ring; 3. a squirrel cage stress ring; 4. a bearing; 5. a first platen; 6. a second pressing plate; 7. a stress loading groove; 8. stress dispersion holes; 9. a damping ring; 10. a heat shield; 11. a heating assembly; 12. adjusting the bearing platform; 13. a first sleeve; 14. a second sleeve; 15. a third sleeve; 16. loading the arm of force.
Detailed Description
The present invention will be described in further detail with reference to the following examples and drawings. It should not be construed that the scope of the above subject matter of the present invention is limited to the following embodiments, and all techniques realized based on the present invention are within the scope of the present invention.
Examples
Referring to fig. 1-4, an axial force calibration device of a squirrel-cage stress ring composite structure comprises a mounting cylinder, wherein a mounting ring 1 and a radial limiting ring 2 are arranged in the mounting cylinder; a squirrel cage stress ring 3 is arranged in the mounting cylinder, one end edge of the squirrel cage stress ring 3 is fixed on the mounting ring 1, and the outer wall of the squirrel cage stress ring 3 is contacted with the inner wall of the radial limiting ring 2; the squirrel cage stress ring 3 is coaxially fixed with a bearing 4, one end of the inner ring of the bearing 4 is fixed with a first pressing plate 5, the other end of the inner ring of the bearing 4 is fixed with a second pressing plate 6, the outer side surface of the first pressing plate 5 and the outer side surface of the second pressing plate 6 are both provided with stress loading grooves 7, and the centers of the stress loading grooves 7 are all positioned on the axis of the bearing 4; the stress loading groove 7 is provided with stress dispersion holes 8.
In this embodiment, when the composite structure of the squirrel-cage stress ring 3 for measuring the axial force is required to be calibrated, a mounting cylinder provided with the composite structure of the squirrel-cage stress ring 3 is placed on a test bench, wherein the mounting edge of the squirrel-cage stress ring 3 and the mounting ring 1 can be fixed by screws, the first pressing plate 5 and the second pressing plate 6 are used for transmitting the force exerted by the loading force arm 16, and compressive stress is exerted on the composite structure of the squirrel-cage stress ring 3 through the contact of the loading force arm 16 and the first pressing plate 5, so that the axial force calibration of the composite structure of the squirrel-cage stress ring 3 under the compression condition is realized; the loading arm 16 is contacted with the second pressing plate 6 through overturning the mounting cylinder, so that tensile stress can be applied to the composite structure of the squirrel-cage stress ring 3, the axial force calibration of the composite structure of the squirrel-cage stress ring 3 under the tensile condition is realized, and the calibration process can complete two calibration tests under the compression and tension loading at one time without disassembly and assembly, so that the test flow is simplified, and the test efficiency is improved; the radial limiting ring 2 is fixedly assembled with the mounting cylinder, which is equivalent to the connection of the radial limiting ring 2 with the casing; the outer wall of the squirrel cage stress ring 3 is contacted with the inner wall of the radial limiting ring 2, so that the assembly state of the squirrel cage stress ring 3 on an actual engine can be simulated, the actual working state of the squirrel cage stress ring 3 is more similar, and the reliability and the authenticity of calibration data are ensured. In addition, in the axial force calibration device of the embodiment, in the process of calibrating the composite structure of the squirrel-cage stress ring 3, after the loading force arm 16 corresponds to the stress loading groove 7 on the first pressing plate 5 or the stress loading groove 7 on the second pressing plate 6 and is positioned, the loading end of the loading force arm 16 stretches into the corresponding stress loading groove 7 to realize the adhesion of the loading end and the stress loading groove 7, point contact is avoided, and the force exerted on the first pressing plate 5 or the second pressing plate 6 by the loading force arm 16 is more uniform; and stress dispersion holes 8 are formed in the stress loading groove 7, and the stress dispersion holes 8 can be formed in the stress concentration position of the stress loading groove 7, so that the problem that stress concentration is generated at the bottom of the stress loading groove 7 in the process of loading or simulating the using environment of the squirrel cage stress ring 3 under the heating condition to carry out stress loading calibration can be further avoided, and the safe performance of the test is ensured.
The inner wall of the radial limiting ring 2 in the embodiment is in a step shape which can be matched with the squirrel-cage stress ring 3, and the radial limiting ring not only has a radial limiting function, but also can realize an axial limiting function of the squirrel-cage stress ring along the reverse course.
Cross-sectional area of stress dispersion holes 8 in this embodiment
The value range is +.>
The stress dispersion holes 8 have a depth +.>
The value range is +.>
The method comprises the steps of carrying out a first treatment on the surface of the Wherein (1)>
For the maximum load exerted on the first pressure plate 5 or the second pressure plate 6 during calibration, +.>
For the yield limit of the first pressure plate 5 or the second pressure plate 6, +.>
For the coefficient of thermal expansion of the first platen 5 or the second platen 6, +.>
For the modulus of elasticity of the first platen 5 or the second platen 6, +.>
For the maximum temperature change of the first pressure plate 5 or the second pressure plate 6 during calibration +.>
For the inner diameter of the bearing 4 (which is used as a stress analysis of a one-dimensional simply supported beam, namely the non-contact position length of the first pressing plate 5 or the second pressing plate 6),>
for the first pressure plate 5 or the second pressure plate 6, the moment of inertia of the cross section,/->
Is the stress-dispersing hole diameter. The shape of the stress loading grooves 7 on the first pressing plate 5 and the second pressing plate 6 is not limited to a circular shape, and the matching can be performed according to the shape of the loading end of the loading arm 16, so that the load loaded by the loading arm 16 is uniformly distributed as much as possible. If the stress loading groove 7 is an arc groove, the stress dispersing holes 8 are formed in the center of the bottom of the arc groove, so that concentrated stress generated by the loading end of the loading arm 16 on the center of the stress loading groove 7 at a small angle can be dispersed, and the stress loading groove 7 is stressed more uniformly. When the stress loading groove 7 is a rectangular groove, the stress dispersion holes 8 are formed inFour corner positions at the bottom of the rectangular groove.
In this embodiment, the first pressing plate 5 and the second pressing plate 6 are both in contact with the end face of the inner ring of the bearing 4, and the first pressing plate 5 and the second pressing plate 6 are fixedly connected through bolts. The first pressing plate 5 and the second pressing plate 6 are respectively arranged on two end faces of the bearing 4 and generate force transmission with the inner ring, the first pressing plate 5 and the second pressing plate 6 are fixed through bolts penetrating through the inner cavity of the bearing 4, the overall stability between the first pressing plate 5, the second pressing plate 6 and the squirrel-cage stress ring 3 composite structure can be ensured, the loaded force can be stably transmitted, and the reliability of calibration data is higher.
A damping ring 9 is arranged between the inner wall of the radial limiting ring 2 and the outer wall of the squirrel cage stress ring 3. The radial limiting ring 2 and the squirrel cage stress ring 3 are in non-contact, a gap is reserved between the radial limiting ring and the squirrel cage stress ring, and friction force is transmitted through the damping ring 9.
The heat insulation cover 10 is further included, and a heating assembly 11 and an adjusting bearing platform 12 for placing the mounting cylinder are arranged in the heat insulation cover 10. When the axial force is calibrated, the mounting cylinder is placed on the adjusting bearing platform 12 in the heat shield 10, the temperature adjustment in the heat shield 10 is realized through the heating component 11 in the heat shield 10, and the heat shield 10 can ensure the temperature control so as to simulate the real working environment of the composite structure of the squirrel cage stress ring 3. The position of the mounting cylinder can be adjusted by the adjusting bearing platform 12, so that the stress loading groove 7 of the first pressing plate 5 or the second pressing plate 6 in the mounting cylinder corresponds to the loading end of the loading arm 16, and stress loading is facilitated. In addition, in the simulated heating calibration process, when the loading end of the loading arm 16 is attached to the corresponding stress loading groove 7 to bear force, thermal stress cannot be dispersed, so that local expansion of an attached part is large easily, and the applied load is unevenly distributed to influence the calibration result; the arrangement of the stress dispersing holes 8 in the embodiment can avoid the problem that the thermal stress cannot be dispersed, and ensure the accuracy of the calibration result.
The mounting cylinder comprises a first sleeve 13, a second sleeve 14 and a third sleeve 15, the mounting ring 1 is fixed between the first sleeve 13 and the second sleeve 14, the radial limiting ring 2 is fixed between the second sleeve 14 and the third sleeve 15, and the first sleeve 13, the second sleeve 14 and the third sleeve 15 are axially fixed through bolts to form a mounting cylinder integral structure. The installation and the disassembly of the composite structure of the installation cylinder and the squirrel cage stress ring 3 are convenient.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.
Claims (8)
1. The axial force calibration device of the squirrel-cage stress ring composite structure is characterized by comprising a mounting cylinder, wherein a mounting ring (1) and a radial limiting ring (2) are arranged in the mounting cylinder; a squirrel cage stress ring (3) is arranged in the mounting cylinder, one end edge of the squirrel cage stress ring (3) is fixed on the mounting ring (1), and the outer wall of the squirrel cage stress ring (3) is in contact with the inner wall of the radial limiting ring (2); the squirrel cage stress ring (3) is coaxially fixed with a bearing (4), one end of an inner ring of the bearing (4) is fixed with a first pressing plate (5), the other end of the inner ring of the bearing (4) is fixed with a second pressing plate (6), the outer side surface of the first pressing plate (5) and the outer side surface of the second pressing plate (6) are respectively provided with a stress loading groove (7), and the centers of the stress loading grooves (7) are all positioned on the axis of the bearing (4); stress dispersion holes (8) are formed in the stress loading groove (7).
2. Axial force calibration device of a squirrel cage stress ring composite structure according to claim 1, characterized in that the cross-sectional area of the stress dispersion holes (8)
The value range is +.>
The stress dispersion holes (8) have a depth +.>
The value range is +.>
The method comprises the steps of carrying out a first treatment on the surface of the Wherein (1)>
For the maximum load exerted on the first (5) or second (6) pressure plate during calibration, < >>
s For the yield limit of the first (5) or second (6) pressure plate, +.>
For the coefficient of thermal expansion of the first (5) or second (6) pressure plate, +.>
For the elastic modulus of the first (5) or second (6) pressure plate, +.>
For the maximum temperature change of the first pressure plate (5) or the second pressure plate (6) in the calibration process, < >>
Is the inner diameter of the bearing (4), +.>
For the first pressure plate (5) or the second pressure plate (6) cross-sectional moment of inertia, +.>
Is the stress-dispersing hole diameter.
3. The axial force calibration device of the squirrel-cage stress ring composite structure according to claim 2, wherein the stress loading groove (7) is an arc-shaped groove, and the stress dispersion holes (8) are formed in the bottom center position of the arc-shaped groove.
4. The axial force calibration device of the squirrel-cage stress ring composite structure according to claim 2, wherein the stress loading groove (7) is a rectangular groove, and the stress dispersion holes (8) are formed in the corner positions of the bottom of the rectangular groove.
5. The axial force calibration device of the squirrel-cage stress ring composite structure according to claim 1, wherein the first pressing plate (5) and the second pressing plate (6) are in contact with the end face of the inner ring of the bearing (4), and the first pressing plate (5) and the second pressing plate (6) are fixedly connected through bolts.
6. The axial force calibration device of the squirrel-cage stress ring composite structure according to claim 1, wherein a damping ring (9) is arranged between the inner wall of the radial limiting ring (2) and the outer wall of the squirrel-cage stress ring (3).
7. The axial force calibration device of the squirrel cage stress ring composite structure according to claim 1, further comprising a heat shield (10), wherein a heating assembly (11) and an adjusting bearing platform (12) for placing a mounting cylinder are arranged in the heat shield (10).
8. The axial force calibration device of the squirrel cage stress ring composite structure according to claim 1, wherein the mounting cylinder comprises a first sleeve (13), a second sleeve (14) and a third sleeve (15), the mounting ring (1) is fixed between the first sleeve (13) and the second sleeve (14), the radial limiting ring (2) is fixed between the second sleeve (14) and the third sleeve (15), and the first sleeve (13), the second sleeve (14) and the third sleeve (15) are axially fixed through bolts to form a mounting cylinder integral structure.
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