CN112461494A - Pulse combustion wind tunnel model support-balance integrated force measuring device - Google Patents
Pulse combustion wind tunnel model support-balance integrated force measuring device Download PDFInfo
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- CN112461494A CN112461494A CN202011238463.3A CN202011238463A CN112461494A CN 112461494 A CN112461494 A CN 112461494A CN 202011238463 A CN202011238463 A CN 202011238463A CN 112461494 A CN112461494 A CN 112461494A
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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
- G01M9/02—Wind tunnels
- G01M9/04—Details
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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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- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
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Abstract
The invention belongs to the technical field of high-speed wind tunnel tests and discloses a pulse combustion wind tunnel model support-balance integrated force measuring device which comprises an upper plate and a lower plate, wherein a balance main body is fixed between the upper plate and the lower plate, the balance main body comprises an upper measuring part and a lower supporting part, the upper measuring part is provided with a Wheatstone bridge X1 and a Wheatstone bridge X2 for measuring the axial force borne by a test model, the Wheatstone bridge Y1, the Wheatstone bridge Y2 and the Wheatstone bridge Y3 for measuring the normal force and the pitching moment borne by the test model, the upper measuring part is covered with a protective cover, the protective cover is separated from a top plate, the leeward side of the balance main body is provided with an outlet wire fairing, and two ends of a containing space of the outlet wire fairing penetrate through the upper plate and the lower. The invention realizes the integrated design of the bracket and the balance of the pulse combustion wind tunnel force measuring system, not only absorbs the characteristic of high rigidity of the box type strain balance, but also greatly saves the space inside the test model.
Description
Technical Field
The invention relates to the technical field of high-speed wind tunnel tests, in particular to a pulse combustion wind tunnel model support-balance integrated force measuring device.
Background
The method is used for obtaining aerodynamic force load (generated) of the integrated aircraft model in the test process, and is one of main purposes of a wind tunnel test of a pulse combustion wind tunnel. Because the test time of the pulse combustion wind tunnel is very short (about 0.3s) and the impact load is large, it is very difficult to obtain the aerodynamic load of the aircraft model in the test process, so that the force measuring technology becomes one of the key technologies of the pulse combustion wind tunnel test.
In order to measure the aerodynamic load borne by (generated by) the test model of the hypersonic aircraft, the force-measuring balance is required to be ensured to be capable of measuring vibration signals of at least 6 periods in the effective test time, the test model at the present stage is mostly processed by stainless steel and aluminum alloy materials, the model has heavy mass, the mass of the test model can reach 500kg for a pulse combustion wind tunnel with the diameter of a spray pipe of 600mm, and the mass of the test model can reach 3.5t for a pulse combustion wind tunnel with the diameter of the spray pipe of 2.4m, so that the force-measuring balance is required to have very high rigidity for measuring the aerodynamic load borne by (generated by) the test model of the aircraft in the test process, and the strain force-measuring balance is the best choice for the pulse combustion wind tunnel force-measuring mode.
The existing pulse combustion wind tunnel strain balance force measurement support mode mainly comprises a tail support and a back support (or an abdominal support), wherein the tail support mode is mainly applied to model force measurement with light weight and small size, and for a machine body/propulsion integrated aircraft test model, because of the existence of a tail support rod, an engine flow passage in the model can be damaged, so that great influence is caused on the force measurement of the integrated aircraft test model, the back support (or the abdominal support) support mode eliminates the influence of the support mode on the engine flow passage of the integrated aircraft test model to a certain extent, and the force measurement balance adopted by the back support (or the abdominal support) is a box type balance, so that the rigidity can be higher during design, the balance force measurement is more favorable, but the influence of the back support (or the abdominal support) support on airflow around the model can only be corrected by a CFD method, and the existing back support mode balance is installed in the model, the space available for installing an oil circuit system or other equipment in the model is greatly reduced, the development of a wind tunnel test is not facilitated, but the force measurement of the pulse combustion wind tunnel test at the present stage is still developed in a back support (or belly support) mode.
The design mode of the force measuring system adopting the back support (or the abdomen support) is independently designed into a model, a balance and a support, the support is fixed on a wind tunnel foundation during the test, the force measuring balance is arranged on the support, and finally the model is arranged on the force measuring balance. However, one of the most significant characteristics of the integrated aircraft is that the flatness ratio is very high, the available space inside the model is very limited, a large number of oil supply devices, data measuring devices and the like are also required to be installed, the available complete space left for the force measuring balance during model design is very small, and great difficulty is brought to model design.
Disclosure of Invention
The invention aims to provide a pulse combustion wind tunnel model support-balance integrated force measuring device to solve the problem that the existing supports and balances occupy large space in a test model.
In order to achieve the purpose, the invention provides the following technical scheme: a pulse combustion wind tunnel model support-balance integrated force measuring device comprises an upper plate and a lower plate, a balance main body is fixed between the upper plate and the lower plate, the balance main body comprises an upper measuring part and a lower supporting part, the upper measuring part comprises a base, the base is fixedly connected with the lower supporting part, two first measuring beams are arranged in the middle of the upper end of the base, second measuring beams are symmetrically arranged on two sides of the upper end of the base, a middle partition plate is jointly arranged at the upper ends of the first measuring beams and the second measuring beams, a third measuring beam is arranged in the middle of the upper end of the middle partition plate, fourth measuring beams are symmetrically arranged on two sides of the upper end of the middle partition plate, a top plate is jointly arranged at the upper ends of the third measuring beams and the fourth measuring beams, the top plate is fixedly connected with the upper plate, a Wheatstone bridge Y3 is arranged on the two first measuring beams, a Wheatstone bridge Y1 and a Wheatstone bridge Y2 are respectively arranged on, a Wheatstone bridge X1 and a Wheatstone bridge X2 are respectively arranged between the third measuring beam and the fourth measuring beams on two sides, the Wheatstone bridge X1 and the Wheatstone bridge X2 are used for measuring the axial force borne by the test model, the Wheatstone bridge Y1, the Wheatstone bridge Y2 and the Wheatstone bridge Y3 are used for measuring the normal force and the pitching moment borne by the test model, the upper measuring part is covered with a protective cover, the protective cover is separated from the top plate, the leeward side of the balance body is provided with an outgoing line fairing, and two ends of a containing space of the outgoing line fairing are respectively communicated with the upper plate and the lower plate.
Preferably, the base is arranged on two sides of the upper end of the base, and a gap I is reserved between the lower end of the top plate and the corresponding side face of the base and between two sides of the middle partition plate.
Preferably, the upper end and the lower end of the side face, close to the middle partition plate, of the base are respectively provided with a first limiting block and a second limiting block, and the lower side of the top plate is provided with a third limiting block matched with the first limiting block.
Preferably, two first measuring beams are arranged back and forth along the radial direction of the base, the front side of the upper end of the first measuring beam at the front side is fixedly connected with the middle partition plate, the back side of the upper end of the first measuring beam at the front side is provided with a gap II with the middle partition plate, the back side of the upper end of the first measuring beam at the back side is fixedly connected with the middle partition plate, the front side of the upper end of the first measuring beam at the back side is provided with a gap II with the middle partition plate, a strain gauge Y32 is adhered to the back end surface of the first measuring beam at the front side, a strain gauge Y33 is adhered to the front end surface of the first measuring beam at the back side, first notches are arranged at the lower part of the front end surface of the first measuring beam at the front side and the lower part of the back end surface of the first measuring beam at the back side, a strain gauge Y31 is adhered to the vertical end surface of the first notch at, the strain gauge Y31, the strain gauge Y32, the strain gauge Y33 and the strain gauge Y34 form a Wheatstone bridge Y3; the lower parts of the opposite end surfaces of the two second measuring beams are respectively provided with a second notch, the left side of the upper end of the left second measuring beam and the right side of the upper end of the right second measuring beam are fixedly connected with the middle partition plate, a gap III is reserved between the right side of the upper end of the left second measuring beam and the left side of the upper end of the right second measuring beam and the middle partition plate, a strain gauge Y12 and a strain gauge Y14 are respectively stuck in front and back of the right end surface of the left second measuring beam, a strain gauge Y21 and a strain gauge Y23 are respectively stuck in front and back of the left end surface of the right second measuring beam, a strain gauge Y11 and a strain gauge Y13 are respectively stuck in front and back of the vertical end surface of the left second notch, and a strain gauge Y22 and a strain gauge Y24, the strain gauge Y11, the strain gauge Y12, the strain gauge Y13 and the strain gauge Y14 form a Wheatstone bridge Y1, the strain gauge Y21, the strain gauge Y22, the strain gauge Y23 and the strain gauge Y24 form a Wheatstone bridge Y2; a strain gauge X24 and a strain gauge X21 are respectively adhered to the front and back of the left end face of the third measuring beam, a strain gauge X23 and a strain gauge X22 are respectively adhered to the front and back of the right end face of the third measuring beam, a Wheatstone bridge X2 is formed by the strain gauge X21, the strain gauge X22, the strain gauge X23 and the strain gauge X24, a strain gauge X11 and a strain gauge X13 are respectively adhered to the front and back of the right end face of the fourth measuring beam on the left side, a strain gauge X12 and a strain gauge X14 are respectively adhered to the front and back of the left end face of the fourth measuring beam on the right side, and a Wheatstone bridge X1 is formed by the strain gauge X11, the strain gauge X12, the strain gauge X.
Preferably, the width of the gaps I, II and III ranges from 1mm to 2 mm.
Preferably, two pin holes are axially distributed at intervals on the upper plate and the lower plate, a plurality of screw holes are distributed at intervals around the two pin holes, the upper plate and the lower plate are positioned with the balance main body through pins, the upper plate and the lower plate are fixedly connected with the balance main body through screws, a plurality of thread clearance holes are distributed at intervals on the front side and the rear side of the upper plate and the lower plate, and the thread clearance holes of the upper plate are countersunk screw holes.
By adopting the technical scheme, the invention has the following beneficial effects:
(1) the invention realizes the integrated design of the bracket and the balance of the pulse combustion wind tunnel force measuring system, not only absorbs the characteristic of high rigidity of the box type strain balance, but also greatly saves the internal space of a test model and releases the model space for the installation of parts such as an oil supply device, a sensor and the like.
(2) The axial force measurement of the test model is realized through the upper Wheatstone bridge X1 and the upper Wheatstone bridge X2, the normal force and the pitching moment of the test model are realized through different combination modes of the lower Wheatstone bridge Y1, the lower Wheatstone bridge Y2 and the lower Wheatstone bridge Y3, and the axial force measurement device has the advantages of being accurate in measurement and easy to operate.
(3) The protective cover is designed, so that the measuring element is not exposed in the air flow of the wind tunnel, and high-temperature damage is prevented; the invention designs the overload protection device consisting of the base and the limiting blocks, realizes mechanical protection on the force measuring balance under the overload condition, and prevents the mechanical damage of a measuring element caused by overlarge deformation of the upper plate of the force measuring device; the invention designs the outgoing line fairing to avoid the damage of each line pipeline led out from the test model by the high-temperature wind tunnel airflow.
Drawings
FIG. 1 is a schematic structural diagram of a pulse combustion wind tunnel model support-balance integrated force measuring device according to an embodiment of the present invention;
FIG. 2 is a schematic view of the arrangement of FIG. 1 with the boot and the outlet boot removed;
FIG. 3 is a top view of FIG. 1;
FIG. 4 is a bottom view of FIG. 1;
FIG. 5 is a strain gage patch view of the upper measurement portion of FIG. 1;
FIG. 6 is a circuit diagram of the balance of the upper measuring part of FIG. 1;
Detailed Description
The invention is described in further detail below with reference to the following figures and embodiments:
reference numerals in the drawings of the specification include: the device comprises an upper plate 1, a balance body 2, a lower plate 3, a protective cover 4, an outgoing line fairing 5, a pin hole 6, a screw hole 7, a thread clearance hole 8, a base 9, a first measuring beam 10, a second measuring beam 11, a middle partition plate 12, a third measuring beam 13, a fourth measuring beam 14, a top plate 15, an outgoing line opening 16, a base 17, a first limiting block 18, a second limiting block 19 and a third limiting block 20.
As shown in fig. 1 to 6, a pulse combustion wind tunnel model support-balance integrated force measuring device comprises an upper plate 1 and a lower plate 3, a balance main body 2 is fixed between the upper plate 1 and the lower plate 3, the balance main body 2 is designed in a trapezoid shape similar to a parallelogram, two pin holes 6 are axially and alternately distributed on the upper plate 1 and the lower plate 3, eight screw holes 7 are alternately distributed on the upper plate 1 around the two pin holes 6, seven screw holes 7 are distributed on the lower plate 3 around the two pin holes 6, the upper plate 1 is positioned with the balance main body 2 by a phi 16 pin matched with the pin holes 6, the lower plate 3 is positioned with the balance main body 2 by a phi 20 pin matched with the pin holes 6, the upper plate 1 is fixedly connected with the balance main body 2 by a M12 screw matched with the screw holes 7, the lower plate 3 is fixedly connected with the balance main body 2 by an M16 screw matched with the screw holes 7, the screw holes 7 and the pin holes 6 of the upper plate 1 and the lower plate 3 are respectively provided with chamfers so as to facilitate the installation of screws and pins. Five phi 11 thread clearance holes 8 are distributed at intervals on the front side and the rear side of the upper plate 1 and used for installing and connecting the device with a test model, and four phi 18 thread clearance holes 8 are distributed at intervals on the front side and the rear side of the lower plate 3 and used for connecting the force measuring device with a wind tunnel foundation. Wherein, the thread clearance hole 8 of the upper plate 1 is a countersunk screw hole 7 to ensure that the nut does not occupy the model space after the screw is installed.
The balance main body 2 comprises an upper measuring part and a lower supporting part, the upper measuring part comprises a base 9, the base 9 is fixedly connected with the lower supporting part, two first measuring beams 10 are arranged in the middle of the upper end of the base 9, second measuring beams 11 are symmetrically arranged on two sides of the upper end of the base 9, and a middle partition plate 12 is arranged on the upper end of each first measuring beam 10 and the upper end of each second measuring beam 11. Two first measuring beams 10 are arranged front and back along the radial direction of the base 9, the front side of the upper end of the first measuring beam 10 at the front side is fixedly connected with the middle partition plate 12, the back side of the upper end of the first measuring beam 10 at the front side is provided with a gap II with the middle partition plate 12, the back side of the upper end of the first measuring beam 10 at the back side is fixedly connected with the middle partition plate 12, the front side of the upper end of the first measuring beam 10 at the back side is provided with a gap II with the middle partition plate 12, the rear end face of the first measuring beam 10 at the front side is adhered with a strain gauge Y32, the front end face of the first measuring beam 10 at the back side is adhered with a strain gauge Y33, the lower parts of the front end face of the first measuring beam 10 at the front side and the rear end face of the first measuring beam 10 at the back side are both provided with first notches, the vertical end face of the first notch at the front side is adhered with a strain gauge Y31, the vertical end faces of the first notches at, the strain gauge Y33 and the strain gauge Y34 form a Wheatstone bridge Y3; the lower parts of the opposite end surfaces of the two second measuring beams 11 are respectively provided with a second notch, the left side of the upper end of the left second measuring beam 11 and the right side of the upper end of the right second measuring beam 11 are fixedly connected with the middle partition plate 12, the left side of the upper end of the left second measuring beam 11 and the left side of the upper end of the right second measuring beam 11 are respectively provided with a gap III with the middle partition plate 12, the front and the back of the right end surface of the left second measuring beam 11 are respectively adhered with a strain gauge Y12 and a strain gauge Y14, the front and the back of the left end surface of the right second measuring beam 11 are respectively adhered with a strain gauge Y387Y 5 and a strain gauge Y23, the front and the back of the vertical end surface of the left second notch are respectively adhered with a strain gauge Y11 and a strain gauge Y13, the front and the back of the vertical end surface of the right second notch are respectively adhered with a strain gauge Y22 and a strain gauge Y24, the strain gauge, strain gauge Y22, strain gauge Y23, and strain gauge Y24 form a Wheatstone bridge Y2. The wheatstone bridge Y1, the wheatstone bridge Y2 and the wheatstone bridge Y3 were used to measure the normal force and the pitching moment to which the test model was subjected.
The middle part of the upper end of the middle clapboard 12 is provided with a third measuring beam 13, the two sides of the upper end of the middle clapboard 12 are symmetrically provided with fourth measuring beams 14, the upper end of the third measuring beam 13 is provided with a backing plate, the third measuring beam 13 is provided with a top plate 15 together through the backing plate and the upper ends of the fourth measuring beams 14, and the top plate 15 is fixedly connected with the upper plate 1. A strain gauge X24 and a strain gauge X21 are respectively adhered to the front and back of the left end surface of the third measuring beam 13, a strain gauge X23 and a strain gauge X22 are respectively adhered to the front and back of the right end surface of the third measuring beam 13, a wheatstone bridge X2 is composed of the strain gauge X21, the strain gauge X22, the strain gauge X23 and the strain gauge X24, a strain gauge X11 and a strain gauge X13 are respectively adhered to the front and back of the right end surface of the left fourth measuring beam 14, a strain gauge X12 and a strain gauge X14 are respectively adhered to the front and back of the left end surface of the right fourth measuring beam 14, and a wheatstone bridge X1 is composed of the strain gauge X11, the strain gauge X12, the strain gauge X13 and the. The wheatstone bridge X1 and the wheatstone bridge X2 were used to measure the axial force experienced by the test model.
Go up the measuring part and be covered with safety cover 4, safety cover 4 and roof 15 separation, the leeward side of balance main part 2 is equipped with the fairing 5 of being qualified for the next round of competitions, the accommodation space both ends of fairing 5 of being qualified for the next round of competitions link up upper plate 1 and hypoplastron 3 respectively, the corresponding position of upper plate 1 and hypoplastron 3 all is equipped with outlet 16 promptly, guarantee that lines such as pressure sensor extension line among the experimental model can draw out from the model, outside the fairing 5 of being qualified for the next round of competitions leads to the wind-tunnel test section, get into the digital acquisition system, in order to guarantee to carry out the surface pressure measurement to the key position of model, perhaps.
The specific implementation process is as follows: through pin positioning and screw fixed connection, after the upper plate 1, the lower plate 3 and the balance main body 2 are assembled, a circuit and a pipeline of a test model penetrate through the accommodating space of the outgoing line fairing 5, then the upper plate 1 is fixedly connected with the test model through screws of the thread clearance holes 8 of the upper plate, and the lower plate 3 is fixedly connected with the wind tunnel foundation through screws of the thread clearance holes 8 of the lower plate. And starting a test, wherein when the upper plate 1 of the force measuring device is subjected to the aerodynamic load transmitted by the model, the measuring element deforms, the strain gauge outputs a y-direction strain value of the pasting position, the y-direction strain value is output through a Wheatstone bridge, and the aerodynamic load applied to the model is calculated by combining the output result of the force measuring device and a calibration formula. The bridging mode of each component load is as follows:
in the formula, X1, X2, Y1, Y2 and Y3 are signals output by the bridges, respectively, and X, Y, Mz are load signals of the axial force, the normal force and the pitching moment received by the test model, respectively.
The foregoing is merely an example of the present invention and common general knowledge in the art of designing and/or characterizing particular aspects and/or features is not described in any greater detail herein. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (6)
1. The utility model provides a pulse combustion wind-tunnel model support-balance integration measuring force device which characterized in that: the balance comprises an upper plate and a lower plate, a balance body is fixed between the upper plate and the lower plate, the balance body comprises an upper measuring part and a lower supporting part, the upper measuring part comprises a base, the base is fixedly connected with the lower supporting part, two first measuring beams are arranged in the middle of the upper end of the base, second measuring beams are symmetrically arranged on two sides of the upper end of the base, a middle partition plate is jointly arranged at the upper ends of the first measuring beams and the second measuring beams, a third measuring beam is arranged in the middle of the upper end of the middle partition plate, fourth measuring beams are symmetrically arranged on two sides of the upper end of the middle partition plate, a top plate is jointly arranged at the upper ends of the third measuring beam and the fourth measuring beams, the top plate is fixedly connected with the upper plate, two first measuring beams are provided with a Wheatstone bridge Y3, two second measuring beams are respectively provided with a Wheatstone bridge Y1 and a Wheatstone bridge Y2, a Wheatstone bridge X1 and a Wheatstone bridge X2 are respectively arranged between the third measuring beam and the, the utility model discloses a balance, including balance body, wheatstone bridge X1 and wheatstone bridge X2, wheatstone bridge Y1, wheatstone bridge Y2 and wheatstone bridge Y3 are used for measuring the axial force that the test model received, wheatstone bridge Y1, wheatstone bridge Y2 and wheatstone bridge Y3 are used for measuring normal force and the pitching moment that the test model received, it has the safety cover to go up the measuring part cover, the safety cover is separated with the roof, the leeward side of balance body is equipped with the fairing of being qualified for the next round of competitions, the accommodation space both ends of the fairing of being qualified for the next.
2. The pulse combustion wind tunnel model support-balance integrated force measuring device according to claim 1, characterized in that: the upper end both sides of base all are equipped with the base, the lower extreme of roof and the both sides of median septum all leave clearance I with the side that corresponds of base between.
3. The pulse combustion wind tunnel model support-balance integrated force measuring device according to claim 2, characterized in that: the base is close to the upper and lower both ends of the side of median septum and is equipped with first stopper and second stopper respectively, the downside of roof is equipped with the third stopper with first stopper matched with.
4. The pulse combustion wind tunnel model support-balance integrated force measuring device according to claim 3, characterized in that: two first measuring beams are arranged front and back along the radial direction of the base, the front side of the upper end of the first measuring beam at the front side is fixedly connected with the middle partition plate, the rear side of the upper end of the first measuring beam at the front side is provided with a gap II with the middle partition plate, the rear side of the upper end of the first measuring beam at the rear side is fixedly connected with the middle partition plate, the front side of the upper end of the first measuring beam at the rear side is provided with a gap II with the middle partition plate, a strain gauge Y32 is adhered to the rear end face of the first measuring beam at the front side, a strain gauge Y33 is adhered to the front end face of the first measuring beam at the rear side, first notches are respectively arranged at the lower part of the front end face of the first measuring beam at the front side and the lower part of the rear end face of the first measuring beam at the rear side, a strain gauge Y34 is adhered to the vertical end face of the first notch at the front side, and a Wheatstone bridge Y3 is formed by the strain gauges Y31, 483Y 33; the lower parts of the opposite end surfaces of the two second measuring beams are respectively provided with a second notch, the left side of the upper end of the left second measuring beam and the right side of the upper end of the right second measuring beam are fixedly connected with the middle partition plate, a gap III is reserved between the right side of the upper end of the left second measuring beam and the left side of the upper end of the right second measuring beam and the middle partition plate, a strain gauge Y12 and a strain gauge Y14 are respectively stuck in front and back of the right end surface of the left second measuring beam, a strain gauge Y21 and a strain gauge Y23 are respectively stuck in front and back of the left end surface of the right second measuring beam, a strain gauge Y11 and a strain gauge Y13 are respectively stuck in front and back of the vertical end surface of the left second notch, and a strain gauge Y22 and a strain gauge Y24, the strain gauge Y11, the strain gauge Y12, the strain gauge Y13 and the strain gauge Y14 form a Wheatstone bridge Y1, the strain gauge Y21, the strain gauge Y22, the strain gauge Y23 and the strain gauge Y24 form a Wheatstone bridge Y2; a strain gauge X24 and a strain gauge X21 are respectively adhered to the front and back of the left end face of the third measuring beam, a strain gauge X23 and a strain gauge X22 are respectively adhered to the front and back of the right end face of the third measuring beam, a Wheatstone bridge X2 is formed by the strain gauge X21, the strain gauge X22, the strain gauge X23 and the strain gauge X24, a strain gauge X11 and a strain gauge X13 are respectively adhered to the front and back of the right end face of the fourth measuring beam on the left side, a strain gauge X12 and a strain gauge X14 are respectively adhered to the front and back of the left end face of the fourth measuring beam on the right side, and a Wheatstone bridge X1 is formed by the strain gauge X11, the strain gauge X12, the strain gauge X.
5. The pulse combustion wind tunnel model support-balance integrated force measuring device according to claim 4, characterized in that: the width ranges of the gap I, the gap II and the gap III are 1mm-2 mm.
6. The pulse combustion wind tunnel model support-balance integrated force measuring device according to claim 1, characterized in that: the balance is characterized in that two pin holes are axially distributed in the upper plate and the lower plate at intervals, a plurality of screw holes are distributed around the two pin holes at intervals, the upper plate and the lower plate are positioned with the balance main body through pins, the upper plate and the lower plate are fixedly connected with the balance main body through screws, a plurality of thread clearance holes are distributed in the front side and the rear side of the upper plate and the lower plate at intervals, and the thread clearance holes of the upper plate are countersunk screw holes.
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| CN202011238463.3A CN112461494B (en) | 2020-11-09 | 2020-11-09 | Pulse combustion wind tunnel model support-balance integrated force measuring device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114001915A (en) * | 2021-11-02 | 2022-02-01 | 中国空气动力研究与发展中心超高速空气动力研究所 | Plate type hinge moment balance |
| CN116222956A (en) * | 2023-05-04 | 2023-06-06 | 中国空气动力研究与发展中心空天技术研究所 | Large-scale tandem type heavy load force balance of pulse wind tunnel and working method |
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| CN116222956B (en) * | 2023-05-04 | 2023-07-04 | 中国空气动力研究与发展中心空天技术研究所 | Large-scale tandem type heavy load force balance of pulse wind tunnel and working method |
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