CN114001916A - Six-component ring type strain balance for jet test and use method - Google Patents
Six-component ring type strain balance for jet test and use method Download PDFInfo
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- CN114001916A CN114001916A CN202111299311.9A CN202111299311A CN114001916A CN 114001916 A CN114001916 A CN 114001916A CN 202111299311 A CN202111299311 A CN 202111299311A CN 114001916 A CN114001916 A CN 114001916A
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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
- G01M9/062—Wind tunnel balances; Holding devices combined with measuring arrangements
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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
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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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention discloses a six-component ring type strain balance for a jet flow test and a using method thereof, wherein the six-component ring type strain balance comprises the following steps: a model end, on which a leveling platform is arranged; the rear end of the axial force measuring element is integrally processed with a connecting section, the rear end of the connecting section is integrally processed with a five-component measuring element, and the rear end of the five-component measuring element is integrally processed with a fixed end. The invention adopts the layout mode that the axial force measuring element is connected with other five-component measuring elements in series, ensures the measuring sensitivity of each component on the premise of ensuring the six-component ring type strain balance to have enough rigidity, has simpler integral structure and is convenient to process.
Description
Technical Field
The invention belongs to the technical field of wind tunnel tests, and particularly relates to a six-component ring type strain balance for a jet flow test.
Background
Jet Reaction Control (RCS) has the advantages of fast response, no limitation of flying height, etc., and is increasingly applied to Control of aircrafts with large overload and high maneuverability. The interference of the jet and the incoming flow can have a serious impact on the aerodynamic properties of the aircraft. Therefore, at the beginning of the design of the aerodynamic profile of the aircraft, relevant research work must be carried out to obtain the disturbance characteristic of the jet flow and provide accurate input conditions for the design of the control system.
The orbital jet is generally arranged near the center of mass of the aircraft, and the jet flow rate is large, so that enough space is required for arranging the jet pipeline. It is therefore difficult to place the balance behind the centre of mass of the aircraft after scaling. The placement of the balance away from the center of mass requires that a large pitching moment must be able to be tolerated.
At present, the jet flow force measurement test methods mainly comprise two methods: firstly, a gap (generally about 0.5 mm) with a certain width is reserved between the spray pipe and the model main body, the measured value of the balance is model aerodynamic force and jet flow interference quantity, and jet flow thrust is not measured; and secondly, the spray pipe is directly and fixedly connected with the model, and the balance simultaneously measures aerodynamic force, jet flow thrust and jet flow interference of the model. The first method is currently used. In order to avoid the impact of the nozzle and the model to influence the measurement result, the balance must have higher rigidity.
Meanwhile, in order to improve the maneuverability, the aircraft is required to have smaller axial force (resistance) and larger normal force (lift), and the design load difference of each measuring element of the balance is larger.
The invention provides a ring type strain balance structure form with small axial force, large normal force, large pitching moment and large rigidity aiming at a jet flow test of the appearance of an elongated body.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a six-component ring-type strain balance for a jet test, including:
a model end, on which a leveling platform is arranged;
the rear end of the axial force measuring element is integrally processed with a connecting section, the rear end of the connecting section is integrally processed with a five-component measuring element, and the rear end of the five-component measuring element is integrally processed with a fixed end.
Preferably, six screw holes are uniformly arranged on the front end face of the model end, and two screw holes used for connecting the leveling block are symmetrically arranged on two sides of the left and right symmetric planes of the leveling platform.
Preferably, the axial force measuring element comprises two rectangular measuring areas which are symmetrically arranged, an isolation groove I which penetrates through two sides of the six-component ring-type strain balance is processed between the front ends of the two rectangular measuring areas, and an isolation groove II which penetrates through two sides of the six-component ring-type strain balance is processed between the rear ends of the two rectangular measuring areas;
two groups of support sheet assemblies which are symmetrical up and down are processed in the rectangular measuring area, and each group of support sheet assemblies comprises three support sheets which are arranged in a staggered mode; a return beam is integrally processed between the two supporting sheet assemblies, connecting beams are respectively processed on two sides of the return beam, and interference elimination grooves are formed in the outer sides of the connecting beams.
Preferably, wherein, the left and right sides that the linkage segment is close to axial measuring element is provided with trough I respectively, the rear end of trough I is provided with walks wire loop I, the rear end of walking wire loop I is provided with four axial trend's trough II, and four trough II evenly arrange in walking I circumferential direction of wire loop, trough II communicates with five component measuring element.
Preferably, the five-component measuring element is of a four-beam column structure, and four measuring beams are uniformly arranged in an annular shape;
the rear end of the five-component measuring element is sequentially provided with a wiring groove III and a wiring ring II, and the sizes of the wiring groove III and the wiring ring II are respectively equal to the sizes of the wiring groove II and the wiring ring I correspondingly.
Preferably, the left side and the right side of the fixed end are respectively provided with a wiring groove IV, the fixed end is uniformly provided with four fan-shaped grooves close to the five-component measuring element, and one side of the end surface of each fan-shaped groove close to the fixed end is uniformly provided with four through holes;
the fixed end is provided with key grooves which are bilaterally symmetrical, and chamfers are respectively arranged on the outer side of the front end face of the model end and the inner side of the rear end face of the fixed end.
Preferably, the parallelism between the surface of the leveling platform and the upper and lower symmetrical planes of the six-component ring strain balance is less than 0.01.
A method of using a six-component ring strain balance for jet testing, comprising the steps of:
step one, connecting the six-component ring type strain balance with a ventilating support rod by four screws;
mounting the leveling block on a balance platform of the six-component ring type strain balance, and adjusting the calibration mechanism until the upper surface of the leveling block reaches the level;
step three, dismantling the leveling block;
step four, connecting the loading sleeve with the six-component ring type strain balance by using six screws;
step five, mounting a loading head, completing calibration of the six-component ring type strain balance according to standard steps, and giving a calibration coefficient;
step six, dismantling the loading head;
step seven, mounting the six-component ring type strain balance and support rod assembly into a wind tunnel test section;
and step eight, completing various preparation works according to the related operation rules of the wind tunnel, and carrying out the test until the test is completely completed.
The invention at least comprises the following beneficial effects: the invention adopts the layout mode that the axial force measuring element is connected with other five-component measuring elements in series, ensures the measuring sensitivity of each component on the premise of ensuring the six-component ring type strain balance to have enough rigidity, has simpler integral structure and is convenient to process.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic diagram of the front structure of a six-component ring type strain balance for a jet test provided by the invention;
FIG. 2 is a schematic top view of a six-component ring strain balance;
FIG. 3 is an isometric view of a six-component ring strain balance;
FIG. 4 is a schematic view of a rectangular measurement area structure of a six-component ring strain balance axial load cell;
FIG. 5 is a schematic end view of the fixed end of a six-component ring strain balance;
FIG. 6 is a schematic end view of a model end of a six-component ring strain balance.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It is to be understood that in the description of the present invention, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are used only for convenience in describing the present invention and for simplification of the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used broadly, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or a communication between two elements, and those skilled in the art will understand the specific meaning of the terms in the present invention specifically.
Further, in the present invention, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacted with the first and second features, or indirectly contacted with the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1-6: the invention relates to a six-component ring type strain balance for a jet flow test, which comprises the following components:
the model end 1 is provided with a leveling platform 2, the length of the model end 1 is 28.5mm, the length of the leveling platform 2 is 15mm, the parallelism between the leveling platform 2 and the upper and lower symmetrical planes of the six-component ring type strain balance is less than 0.01, and the distance is 16.5 mm;
the axial force measuring element 3 is integrally processed at the rear end of the model end 1, a connecting section 4 is integrally processed at the rear end of the axial force measuring element 3, a five-component measuring element 5 is integrally processed at the rear end of the connecting section, a fixed end 6 is integrally processed at the rear end of the five-component measuring element 5, the outer diameter of the fixed end 6 is 34mm, and the length of the fixed end is 31.5 mm; the outer diameter of the whole six-component ring type strain balance is 39mm, and the inner diameter of the whole six-component ring type strain balance is 20 mm.
The working principle is as follows: according to the six-component ring type strain balance for the jet test, the model end 1 is used for connecting and installing the loading sleeve and the loading head, and the leveling platform 2 is used for installing the leveling block and leveling the six-component ring type strain balance; the axial force measuring element 3 is used for measuring the axial force of the six-component ring-type strain balance, and the five-component measuring element 5 is used for measuring the normal force of the six-component ring-type strain balance; the fixed end 6 is used for connecting and fixing the six-component ring type strain balance and the ventilating support rod. The invention adopts the layout mode that the axial force measuring element is connected with other five-component measuring elements in series, ensures the measuring sensitivity of each component on the premise of ensuring the six-component ring type strain balance to have enough rigidity, ensures that the six-component ring type strain balance is suitable for wind tunnel tests with small axial force, large normal force, large pitching moment and large rigidity, has simpler integral structure and is convenient to process. In order to improve the overall rigidity of the six-component ring strain balance, the lengths of the model end 1, the connecting section 4 and the fixed end 6 and the structural size of the five-component measuring element 5 are increased as much as possible under the condition that the overall space of the test device allows and ensures that other five-component measuring elements have appropriate sensitivity.
In the technical scheme, six screw holes with the specification of M4 are uniformly distributed on the front end face of the model end 1, the depth of each screw hole is 15mm, and the model end 1 is connected with a fixed loading sleeve through the six screw holes; the bilateral symmetry of leveling platform 2 has two M4 screw holes that are used for connecting the leveling piece to have bilateral symmetry, and the screw hole degree of depth is 6 mm.
In the technical scheme, the axial force measuring element 3 comprises two rectangular measuring areas 31 which are symmetrically arranged, the distance between the bottom of each rectangular measuring area 31 and the outer edge of a six-component ring-type strain balance is 2.2mm, an isolation groove I32 which penetrates through two sides of the six-component ring-type strain balance is processed between the front ends of the two rectangular measuring areas 31, an isolation groove II 33 which penetrates through two sides of the six-component ring-type strain balance is processed between the rear ends of the two rectangular measuring areas 31, and the widths of the isolation groove I32 and the isolation groove II 33 are both 1 mm;
two groups of support sheet assemblies 34 which are symmetrical up and down are processed in the rectangular measurement area 31, each group of support sheet assemblies 34 comprises three support sheets 341 which are arranged in a staggered mode, the distance between the edges of the same side of two adjacent support sheets 341 is 1mm, and the distance between the two adjacent support sheets 341 is 0.5 mm; a rectangular beam 35 is integrally processed between the two support plate assemblies 34, the width of the rectangular beam 35 is 4mm, the height of the rectangular beam is 5mm, connecting beams 36 are respectively processed on two sides of the rectangular beam 35, a disturbance eliminating groove 37 is arranged on the outer side of each connecting beam 36, the distance between each disturbance eliminating groove 37 and the rectangular beam 35 is 0.8mm, the length of each disturbance eliminating groove 37 is 14mm, and the width of each disturbance eliminating groove is 0.5 mm. Rounded transitions are used at all sharp corners in the rectangular measurement area 31. The supporting pieces 341 arranged in a staggered manner increase the structural rigidity of the axial force measuring element 3, and the interference of the pitching moment on the axial force is reduced by the arrangement of the interference elimination grooves 37.
In the technical scheme, the left side and the right side of the connecting section 4, which are close to the axial measuring element 3, are respectively provided with a wiring groove I41, the length of each wiring groove I41 is 6mm, the rear end of each wiring groove I41 is provided with a wiring ring I42 with the outer diameter of 34mm, and the width of each wiring ring I42 is 5 mm; the rear end of the wiring ring I42 is provided with four wiring grooves II 43 in the axial direction, the four wiring grooves II 43 are uniformly distributed in the circumferential direction of the wiring ring I42, the width of each wiring groove II 43 is 6mm, and each wiring groove II 43 is communicated with the five-component measuring element 5.
In the above technical scheme, the five-component measuring element 5 is a four-beam column structure, and four measuring beams 51 are uniformly arranged in a ring shape;
the rear end of the five-component measuring element 5 is sequentially provided with a wiring groove III 52 and a wiring ring II 53, and the sizes of the wiring groove III 52 and the wiring ring II 53 are respectively equal to the sizes of the wiring groove II 43 and the wiring ring I42.
In the technical scheme, the left side and the right side of the fixed end 6 are respectively provided with a wiring groove IV 61 with the width of 6mm, the fixed end 6 is uniformly provided with four fan-shaped grooves 62 at the position close to the five-component measuring element 5, the bottom of each fan-shaped groove 62 is 11mm away from the axis of the six-component ring strain balance, the fan-shaped half angle is 20 degrees, the length of each fan-shaped groove is 18mm, and one side of the end face, close to the fixed end, of each fan-shaped groove 62 is uniformly provided with four through holes 63 with the diameter of 4.5 mm;
be provided with bilateral symmetry's keyway 64 on stiff end 6, the keyway 64 width is 3mm, and the degree of depth is 10mm, highly is 2.6mm, the preceding terminal surface outside of model end 1 and the rear end face inboard of stiff end 6 are provided with the 2mm chamfer respectively.
A method of using a six-component ring strain balance for jet testing, comprising the steps of:
step one, connecting the six-component ring type strain balance with a ventilating support rod by four screws;
mounting the leveling block on a balance platform of the six-component ring type strain balance, and adjusting the calibration mechanism until the upper surface of the leveling block reaches the level;
step three, dismantling the leveling block;
step four, connecting the loading sleeve with the six-component ring type strain balance by using six screws;
step five, mounting a loading head, completing calibration of the six-component ring type strain balance according to standard steps, and giving a calibration coefficient;
step six, dismantling the loading head;
step seven, mounting the six-component ring type strain balance and support rod assembly into a wind tunnel test section;
and step eight, completing various preparation works according to the related operation rules of the wind tunnel, and carrying out the test until the test is completely completed.
The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (8)
1. A six-component ring strain balance for use in a jet test, comprising:
a model end, on which a leveling platform is arranged;
the rear end of the axial force measuring element is integrally processed with a connecting section, the rear end of the connecting section is integrally processed with a five-component measuring element, and the rear end of the five-component measuring element is integrally processed with a fixed end.
2. The six-component ring-type strain balance for the jet test as claimed in claim 1, wherein six screw holes are uniformly arranged on the front end face of the model end, and two screw holes for connecting the leveling block are symmetrically arranged on both sides of the left and right symmetric planes of the leveling platform.
3. The six-component ring-type strain balance for the jet test according to claim 1, wherein the axial force measuring element comprises two rectangular measuring areas which are symmetrically arranged, an isolation groove I which penetrates through two sides of the six-component ring-type strain balance is formed between the front ends of the two rectangular measuring areas, and an isolation groove II which penetrates through two sides of the six-component ring-type strain balance is formed between the rear ends of the two rectangular measuring areas;
two groups of support sheet assemblies which are symmetrical up and down are processed in the rectangular measuring area, and each group of support sheet assemblies comprises three support sheets which are arranged in a staggered mode; a return beam is integrally processed between the two supporting sheet assemblies, connecting beams are respectively processed on two sides of the return beam, and interference elimination grooves are formed in the outer sides of the connecting beams.
4. The six-component ring-type strain balance for the jet test according to claim 1, wherein the left and right sides of the connecting section near the axial measuring element are respectively provided with a wiring groove I, the rear end of the wiring groove I is provided with a wiring ring I, the rear end of the wiring ring I is provided with four wiring grooves II which are axially oriented, the four wiring grooves II are uniformly arranged in the circumferential direction of the wiring ring I, and the wiring grooves II are communicated with the five-component measuring element.
5. The six-component ring-type strain balance for jet test according to claim 4, wherein the five-component measuring element is a four-beam column structure, and four measuring beams are uniformly arranged in a ring shape;
the rear end of the five-component measuring element is sequentially provided with a wiring groove III and a wiring ring II, and the sizes of the wiring groove III and the wiring ring II are respectively equal to the sizes of the wiring groove II and the wiring ring I correspondingly.
6. The six-component ring type strain balance for the jet test as claimed in claim 1, wherein the fixed end is provided with a wiring groove IV on the left side and the right side respectively, the fixed end is provided with four fan-shaped grooves uniformly near the five-component measuring element, and one side of the fan-shaped groove near the end face of the fixed end is provided with four through holes uniformly;
the fixed end is provided with key grooves which are bilaterally symmetrical, and chamfers are respectively arranged on the outer side of the front end face of the model end and the inner side of the rear end face of the fixed end.
7. The six-component ring strain balance for jet testing of claim 1, wherein the leveling platform surface is less than 0.01 parallel to the top and bottom symmetry plane of the six-component ring strain balance.
8. Use of a six-component ring strain balance for jet testing based on a six-component ring strain balance for jet testing according to any of claims 1 to 7, comprising the steps of:
step one, connecting the six-component ring type strain balance with a ventilating support rod by four screws;
mounting the leveling block on a balance platform of the six-component ring type strain balance, and adjusting the calibration mechanism until the upper surface of the leveling block reaches the level;
step three, dismantling the leveling block;
step four, connecting the loading sleeve with the six-component ring type strain balance by using six screws;
step five, mounting a loading head, completing calibration of the six-component ring type strain balance according to standard steps, and giving a calibration coefficient;
step six, dismantling the loading head;
step seven, mounting the six-component ring type strain balance and support rod assembly into a wind tunnel test section;
and step eight, completing various preparation works according to the related operation rules of the wind tunnel, and carrying out the test until the test is completely completed.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111299311.9A CN114001916B (en) | 2021-11-04 | 2021-11-04 | Six-component ring type strain balance for jet flow test and using method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111299311.9A CN114001916B (en) | 2021-11-04 | 2021-11-04 | Six-component ring type strain balance for jet flow test and using method |
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| CN114001916A true CN114001916A (en) | 2022-02-01 |
| CN114001916B CN114001916B (en) | 2023-04-07 |
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Cited By (2)
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| CN115077853A (en) * | 2022-08-23 | 2022-09-20 | 中国空气动力研究与发展中心高速空气动力研究所 | Six-component balance for wind tunnel jet flow experiment and application mode thereof |
| CN116046335A (en) * | 2023-04-03 | 2023-05-02 | 中国空气动力研究与发展中心高速空气动力研究所 | Rod type strain balance working in normal-temperature to low-temperature wide temperature range and application method |
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| CN115077853A (en) * | 2022-08-23 | 2022-09-20 | 中国空气动力研究与发展中心高速空气动力研究所 | Six-component balance for wind tunnel jet flow experiment and application mode thereof |
| CN115077853B (en) * | 2022-08-23 | 2022-11-11 | 中国空气动力研究与发展中心高速空气动力研究所 | Six-component balance for wind tunnel jet flow experiment and application mode thereof |
| CN116046335A (en) * | 2023-04-03 | 2023-05-02 | 中国空气动力研究与发展中心高速空气动力研究所 | Rod type strain balance working in normal-temperature to low-temperature wide temperature range and application method |
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| Publication number | Publication date |
|---|---|
| CN114001916B (en) | 2023-04-07 |
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