CN113834626A - Load unmatched six-component large-moment balance - Google Patents
Load unmatched six-component large-moment balance Download PDFInfo
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- CN113834626A CN113834626A CN202110997608.6A CN202110997608A CN113834626A CN 113834626 A CN113834626 A CN 113834626A CN 202110997608 A CN202110997608 A CN 202110997608A CN 113834626 A CN113834626 A CN 113834626A
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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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- 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
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- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention belongs to the technical field of wind tunnel aerodynamic force measuring devices, and particularly relates to a load unmatched six-component large-torque balance, which comprises the following components: a mould connection (1), a measuring element assembly (11) and a fixed connection (6); the measuring element assembly (11) is arranged between the model connecting piece (1) and the fixed connecting piece (6); the measuring element assembly (11) comprises: a torque measuring element, a first force measuring element, a second force measuring element, a first transition (8), a second transition (9) and a third transition (10); the tail end of the first transition section (8), the starting end of the second transition section (9), the tail end of the second transition section (9) and the starting end of the third transition section (10) are mutually arranged in an end-to-end connection way; the torque measuring elements are arranged at the beginning of the first transition (8), the first force measuring elements are arranged at the beginning and the end of the second transition (9), and the second force measuring elements are arranged at the end of the third transition (10).
Description
Technical Field
The invention belongs to the technical field of wind tunnel aerodynamic force measuring devices, and particularly relates to a load unmatched six-component large-moment balance.
Background
At present, an internal six-component rod type balance is generally adopted in a wind tunnel force measurement test, measuring elements of the balance are symmetrically arranged in front of and behind a balance calibration center, and the balance has the common characteristics that: the balance calibration center is coincided with the model pressure center or has a small distance with the model pressure center, the matching performance of each component load of the balance is good, the force is larger than the moment load, and the ratio of the force to the moment load is different from several to dozens of times. For scales with a calibration center far from the model center of pressure, such scales are subjected to large moment loads, but the force loads of such scales are usually small, which results in a large ratio of moment to force load for the scales. For the wind tunnel test under the conditions of large moment load and large ratio of moment to force load, the internal six-component rod balance cannot meet the measurement requirements of small force load and large moment load, so that the measurement of large moment load and small force load of a model in the wind tunnel test is difficult.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention provides the load-unmatched six-component large-moment balance, and solves the problem that the moment load of a model is large and the force load is small in the wind tunnel test and is difficult to measure.
The invention provides a load unmatched six-component large moment balance, which comprises: a mold connector, a measuring element assembly and a fixed connector;
the measuring element assembly is arranged between the model connecting piece and the fixed connecting piece;
the measuring element assembly includes: a torque measuring element, a first force measuring element, a second force measuring element, a first transition section, a second transition section, and a third transition section;
the tail end of the first transition section, the starting end of the second transition section, the tail end of the second transition section and the starting end of the third transition section are arranged in an end-to-end connection mode to form a serial connection structure;
the moment measuring element is arranged at the starting end of the first transition section, the first force measuring element is arranged at the starting end and the tail end of the second transition section, and the second force measuring element is arranged at the tail end of the third transition section.
As an improvement of the above technical solution, the torque measuring element includes: pitch and roll measurement elements and yaw measurement elements;
the first force measuring element comprises a lateral force Z component measuring element and an axial force X component measuring element;
the second force measuring element comprises a normal force Y component measuring element;
the starting end of the first transition section is connected with the model connecting piece through the pitching and rolling measuring elements and the yawing measuring elements arranged on the first transition section, and the pitching and rolling measuring elements and the yawing measuring elements are circumferentially distributed;
lateral force Z component measuring elements are respectively arranged on the left side and the right side of the starting end of the second transition section; axial force X component measuring elements are respectively arranged on the upper side and the lower side of the tail end of the second transition section;
at least one multi-group statically indeterminate beam is sleeved on the third transition section, the statically indeterminate beam and the fixed connecting piece are sleeved with each other to form an integrated non-detachable spoke type structure, and the statically indeterminate beam is close to the fixed connecting piece.
As an improvement of the above technical solution, the pitch and roll measuring element further comprises: a first measuring element and a second measuring element; wherein the first measuring element and the second measuring element jointly measure the pitching moment Mz component load and the rolling moment Mx component load of the aerodynamic load;
the yaw measuring element further comprises: a third measuring element and a fourth measuring element; the third measuring element and the fourth measuring element jointly measure the load of the yaw moment My component of the pneumatic load;
the first measuring element, the second measuring element, the third measuring element and the fourth measuring element are distributed at 0 degree in the circumferential direction, and the four measuring elements are all arranged at the starting end of the first transition section.
As one improvement of the technical scheme, the lateral force Z component measuring element is used for measuring the lateral force Z component load of the pneumatic load;
the axial force X component measuring element is used for measuring the axial force X component load of the pneumatic load.
As one improvement of the above technical solution, resistance strain gauges are respectively disposed on the pitch and roll measuring element, the yaw measuring element, the lateral force Z component measuring element, the axial force X component measuring element and the normal force Y component measuring element to form a wheatstone full bridge forming measuring circuit.
As one improvement of the above technical solution, the cross section of the second transition section is a cylindrical structure, the left and right sides of the starting end of the second transition section along the horizontal direction are provided with first L-shaped platforms, and the upper and lower sides of the tail end of the second transition section along the vertical direction are respectively provided with second L-shaped platforms;
a lateral force Z component measuring element is arranged on each first L-shaped platform; an axial force X component measuring element is arranged on each second L-shaped platform;
the lateral force Z component measuring element and the axial force X component measuring element are both of a multi-piece statically indeterminate beam structure.
As one improvement of the technical scheme, the lateral force Z component measuring element comprises 4 superposed hyperstatic beams which are arranged symmetrically left and right;
the axial force X component measuring element comprises 4 superposed hyperstatic beams which are arranged in an up-down symmetrical mode.
As an improvement of the above technical solution, in the spoke type structure, the third transition section is an inner circle, the fixed connecting piece is an outer circle, a plurality of groups of statically indeterminate beams distributed circumferentially are arranged between the inner circle and the outer circle of the spoke type structure, the plurality of groups of statically indeterminate beams on the same cross section are distributed in a structure of a shape like a Chinese character 'mi', and at least one group of statically indeterminate beams distributed circumferentially are distributed on the same cross section along the axial direction;
among 8 groups of statically indeterminate beams distributed in a shape like a Chinese character 'mi', 4 groups of statically indeterminate beams positioned at an X-shaped position are used as a normal force Y component measuring element 7, namely a measuring beam, and are used for measuring the pneumatic load of a normal force Y component;
4 groups of statically indeterminate beams positioned at the cross-shaped position are used as supporting beams to play a supporting role.
The measuring element assembly specifically comprises: a normal force Y component measuring element, a pitching moment Mz component measuring element (first measuring element), an axial force X component measuring element, a rolling moment Mx component measuring element (second measuring element), a lateral force Z component and a yawing moment My component measuring element, wherein a pitching moment Mz component measuring element (first measuring element), a rolling moment Mx component measuring element (second measuring element) and a yawing measuring element are arranged as moment measuring elements near the model connection, at the same time, the design center of the entire balance is arranged in the center of the measuring unit, connected to the moment measuring element are a lateral force Z-component measuring element and an axial force X-component measuring element, followed by a normal force Y-component measuring element, because the balance overall structure adopts the form of establishing ties, the stiff end of preceding measuring element is the free end of following measuring element. The resistance strain gauges are adhered to each measuring element of the balance to form a Wheatstone bridge, and the resistance of the strain gauges is changed after being loaded so that the Wheatstone bridge loses electrical balance to generate voltage output, and a relational expression of the load and the voltage output is established.
Compared with the prior art, the invention has the beneficial effects that:
1. the device well solves the problem that the force is not matched with the moment load seriously under the condition of large moment, and realizes the accurate measurement of the pneumatic load of the test model in the wind tunnel;
2. the measuring element assembly is in a series structure form and is divided into three sections of measuring elements, and each corresponding measuring element is used for measuring the pneumatic load of a certain component, so that the technical problems of large moment and small force of the balance are solved;
3. in the device, a lateral force Z component measuring element and an axial force X component measuring element with a multi-piece statically indeterminate beam structure are adopted to correspondingly measure the lateral force and the axial force of the pneumatic load, the moment load of the balance is 3000N.m, the ratio of the moment to the force is 3:1, the proportion of the moment to the force of the conventional balance does not appear, and the sensitivity of each measuring element is improved under the condition of keeping the integral rigidity of the balance unchanged basically;
4. in the device, the normal force Y component measuring piece with the spoke type structure is adopted, so that the device can resist a larger bending moment load and measure a larger or smaller force load; in the invention, the axial length of the spoke type structure is increased to the greatest extent in the installation space of the test model, and meanwhile, a plurality of groups of statically indeterminate beam structures are arranged between the inner circle and the outer circle of the spoke type structure and are arranged in a shape like a Chinese character 'mi'; the increase of the axial length of the spoke type structure further improves the integral rigidity of the balance, and can effectively reduce the interference of a large-moment load on the statically indeterminate beam; the hyperstatic beam at the X position in the 'meter' -shaped layout structure is used as a measuring beam, so that the interference of other component loads on the measuring element is further reduced.
Drawings
FIG. 1 is a front view of a six-component high moment balance of the present invention providing a load mismatch;
FIG. 2 is a top view of a six-component high moment balance of the present invention providing a load mismatch;
FIG. 3 is a three-dimensional view of a six-component high moment balance of the present invention providing a load mismatch;
FIG. 4 is a three-dimensional cross-sectional view of a six-component high moment balance in which the present invention provides a load mismatch;
FIG. 5 is a cross-sectional view A-A of FIG. 1;
FIG. 6 is a cross-sectional view B-B of FIG. 1;
FIG. 7 is a cross-sectional view C-C of FIG. 1;
FIG. 8 is a cross-sectional view D-D of FIG. 1;
FIG. 9 is a cross-sectional view E-E of FIG. 1;
FIG. 10 is a cross-sectional view F-F of FIG. 2;
fig. 11 is a left side view of fig. 1.
Reference numerals:
1. model connection 2, pitch and roll measuring element
3. Yaw measuring element 4, lateral force Z component measuring element
5. Axial force X component measuring element 6 and fixed connecting piece
7. Normal force Y component measuring element
21. First measuring element 22, second measuring element
31. Third measuring element 32, fourth measuring element
8. A first transition section 9 and a second transition section
10. Third transition section 11, measuring element assembly
Detailed Description
The invention will now be further described with reference to the accompanying drawings and examples.
As shown in fig. 1, 2, 3, 4 and 11, the invention provides a load unmatched six-component large moment balance which is a hollow steel integral cylindrical structure; it includes: a mould connection 1, a measuring element assembly 11 and a fixed connection 6;
the measuring element assembly 11 is arranged between the mould connection piece 1 and the fixed connection piece 6; wherein each component in the measuring element assembly 11 is capable of measuring a component of the pneumatic load, solving the problem of large moment and small force load of the balance. The end part of the model connecting piece 1 is fixedly connected with an external model to be tested in a flange mode through 12M 10 high-strength bolts; the end of the fixed connecting piece 6 of the balance is fixedly connected with an external wind tunnel supporting system in a flange connection mode through 12M 18 high-strength bolts.
The measuring element assembly 11 comprises: a torque measuring element, a first force measuring element, a second force measuring element, a first transition section 8, a second transition section 9 and a third transition section 10;
the tail end of the first transition section 8, the starting end of the second transition section 9, the tail end of the second transition section 9 and the starting end of the third transition section 10 are mutually connected end to form a serial structure;
the torque measuring elements are arranged at the beginning of the first transition 8, the first force measuring elements are arranged at the beginning and the end of the second transition 9, and the second force measuring elements are arranged at the end of the third transition 10.
As shown in fig. 3, 4, 5, 6, and 7, the torque measuring element includes: pitch and roll measuring elements 2 and yaw measuring elements 3;
as shown in fig. 6 and 7, the first force measuring element comprises a lateral force Z-component measuring element 4 and an axial force X-component measuring element 5;
as shown in fig. 8, the second force measuring element comprises a normal force Y component measuring element 7;
the starting end of the first transition section 8 is connected with the model connecting piece 1 through the pitching and rolling measuring element 2 and the yawing measuring element 3 which are arranged on the first transition section, and the pitching and rolling measuring element 2 and the yawing measuring element 3 are distributed and arranged in a circle;
as shown in fig. 1, 4 and 5, lateral force Z component measuring elements 4 are respectively provided on the left and right sides of the starting end of the second transition section 9; the upper side and the lower side of the tail end of the second transition section 9 are respectively provided with an axial force X component measuring element 5;
as shown in fig. 1, 6 and 7, at least one plurality of groups of statically indeterminate beams are sleeved on the third transition section 10, and the statically indeterminate beams are sleeved in the fixed connecting piece 6 to form an integrated non-detachable spoke type structure, and the statically indeterminate beams are close to the fixed connecting piece 6.
As shown in fig. 1, 2, 9 and 10, the cross section of the second transition section 9 is a cylindrical structure, first L-shaped platforms are respectively disposed on the left and right sides of the starting end of the second transition section 9 along the horizontal direction, and second L-shaped platforms are respectively disposed on the upper and lower sides of the tail end of the second transition section 9 along the vertical direction; in fig. 2, the outward direction of the vertical paper is the right side in the horizontal direction, and the inward direction of the vertical paper is the left side in the horizontal direction; the upper side in fig. 2 is the upper side in the vertical direction, and the lower side in the vertical direction;
a lateral force Z component measuring element 4 is arranged on each first L-shaped platform; an axial force X component measuring element 5 is arranged on each second L-shaped platform;
the lateral force Z component measuring element 4 and the axial force X component measuring element 5 are both of a multi-piece statically indeterminate beam structure.
As shown in fig. 4, the lateral force Z component measuring element 4 includes 4 superposed hyperstatic beams symmetrically arranged left and right; the lateral force Z component measuring element 4 is used for measuring the lateral force Z component load of the pneumatic load;
as shown in fig. 5, the axial force X component measuring element 5 includes 4 stacked hyperstatic beams symmetrically arranged up and down. And the axial force X component measuring element 5 is used for measuring the axial force X component load of the pneumatic load.
The pitch and roll measuring element 2 further comprises: a first measuring element 21 and a second measuring element 22; wherein the first measuring element 21 and the second measuring element 22 together measure the pitch moment Mz component load and the roll moment Mx component load of the aerodynamic load;
the yaw measuring element 3 further comprises: a third measuring element 31 and a fourth measuring element 32; wherein the third measuring element 31 and the fourth measuring element 32 together measure the yaw moment My component load of the aerodynamic load;
the first measuring element 21, the second measuring element 22, the third measuring element 31 and the fourth measuring element 32 are distributed at 90 degrees in the circumferential direction, and all four are arranged at the beginning of the first transition section 8.
Wherein, in the first measuring element 21, the second measuring element 22, the third measuring element 31 and the fourth measuring element 32, each column beam has a thickness of 6mm and a height of 20 mm.
Resistance strain gauges are respectively arranged on the pitching and rolling measuring element 2, the yawing measuring element 3, the lateral force Z component measuring element 4, the axial force X component measuring element 5 and the normal force Y component measuring element 7 to form a Wheatstone full bridge forming measuring circuit.
In order to ensure the integral rigidity of the components of the axial force X component and the lateral force Z component of the balance and the proper sensitivity output of a patch area, based on the structural form of the multiple hyperstatic beams, because the loads of the lateral force Z and the normal force Y are the same, the length of each 8 hyperstatic beams in the transverse direction and the longitudinal direction is 25mm, the thickness is 1mm, and the width is 60 mm.
As shown in fig. 6, 7 and 8, in the spoke type structure, the third transition section 10 is an inner circle, the fixed connecting piece 6 is an outer circle, a plurality of groups of statically indeterminate beams distributed circumferentially are arranged between the inner circle and the outer circle of the spoke type structure, the plurality of groups of statically indeterminate beams on the same cross section are distributed in a structure shaped like a Chinese character 'mi', 8 groups of statically indeterminate beams distributed circumferentially are distributed on the same cross section along the axial direction, and in the embodiment, 80 groups of statically indeterminate beams are distributed on different cross sections along the axial direction in the spoke type structure; as shown in fig. 5, there are 10 sets of statically indeterminate beams at the end of the third transition section 10, and every 5 sets of statically indeterminate beams are used as a set to form two sets, and the two sets are spaced apart, and a plurality of sets of statically indeterminate beams close to the fixed connection member 6 can realize the measurement of the normal force Y component load of the pneumatic load.
Among 8 groups of statically indeterminate beams distributed in a shape like a Chinese character 'mi', 4 groups of statically indeterminate beams positioned at an X-shaped position are used as a normal force Y component measuring element 7, namely a measuring beam, and are used for measuring the pneumatic load of a normal force Y component;
4 groups of statically indeterminate beams positioned at the cross-shaped position are used as supporting beams to play a supporting role.
Wherein, the first measuring element 21 and the second measuring element measure the pitching moment Mz component together, the third measuring element 31 and the fourth measuring element 32 measure the yawing moment My component together, the four measuring elements are used as moment measuring elements and are arranged close to the model connecting piece 1, meanwhile, the center of the whole balance is arranged at the central position of the measuring element assembly 11, two lateral force Z component measuring elements 4 and two axial force X component measuring elements 5 are connected with the moment measuring elements, and then a normal force Y component measuring element 7 is connected with the moment measuring elements, and the whole structure of the balance adopts a series connection mode, so that the fixed end of the former measuring element is the free end of the latter measuring element. Wherein, the lateral force Z component measuring element 4 is used for measuring the lateral force Z component of the pneumatic load; and an axial force X component measuring element 5 for measuring the axial force X component of the pneumatic load. The lateral force Z-component measuring element 4 and the two axial force X-component measuring elements 5 serve as force measuring elements.
The torque measuring element comprises: a first measuring element 21, a second measuring element 22, a third measuring element 31 and a fourth measuring element 32; the system comprises a pitching moment Mz component, a rolling moment Mx component and a yawing moment My component which are used for measuring aerodynamic loads; a lateral force Z component measuring element 4 and two axial force X component measuring elements 5 as force measuring elements for measuring the axial force X component and the lateral force Z component, respectively, correspondingly; the normal force Y component measuring element 7 is used as a normal force measuring element for measuring the normal force Y component;
resistance strain gauges are respectively arranged on the pitching and rolling measuring element 2, the yawing measuring element 3, the lateral force Z component measuring element 4, the axial force X component measuring element 5 and the normal force Y component measuring element 7, resistance strain gauges are respectively adhered on the three measuring elements to form a Wheatstone bridge, namely, the resistance strain gauges are respectively adhered on the normal force, the pitching moment, the lateral force, the yawing moment, the axial force and the rolling moment measuring elements to form a Wheatstone full bridge to form a measuring circuit, the 6 bridges are independent, when the pneumatic load of a certain component acts independently, only the bridge of the component has larger output, and the bridges of other components have no output basically. Adhering resistance strain gauges on each measuring element of the balance to form a Wheatstone bridge, and utilizing the resistance of the strain gauges after being loaded to change, so that the formed Wheatstone bridge loses electric balance, voltage output (y) is generated, and a relation between the load and the voltage output is established:
y＝β*Fi；
where Fi is an applied standard load representing an input amount, y is a voltage value generated by applying the standard load representing an output amount, and β is a correlation matrix coefficient between y and Fi.
In the wind tunnel test, y 'represents a voltage value generated by the aerodynamic load and represents an input amount, and Fi' represents an output amount, the aerodynamic load being calculated from the formula Fi '═ α y'. α is the inverse matrix coefficient of β.
The balance adopts a series structure form, and the force measuring element and the moment measuring element are respectively arranged at different positions of the balance body and are used for measuring different moment components and load force components.
The balance adopts a structural form of a plurality of hyperstatic beams, so that the integral rigidity of the balance is ensured, and each measuring element has appropriate sensitivity output.
The fixed connecting piece 6 is rigidly connected with the wind tunnel bracket. The balance has a serial connection mode, the fixed end of the former measuring element is the free end of the latter measuring element, and in order to ensure the minimum mutual interference among the measuring elements, the length of a transition section for connecting the measuring units is increased to the maximum extent under the condition that the design condition allows.
In the wind tunnel test process, aerodynamic load acting on an aircraft model enables a normal force Y component and pitching moment Mz component measuring element, a lateral force Z component and yawing moment My component measuring element, an axial force X measuring element and a rolling moment Mx measuring element of the large-torque balance to generate corresponding deformation, a Wheatstone bridge formed by strain gauges pasted on the measuring elements is caused to lose electric balance, electric signal output is generated, the pneumatic load on the model is calculated by utilizing a relation formula obtained by balance static calibration, and accurate measurement of the pneumatic load of the test model is realized.
In this example, the load of the balance can be measured using the apparatus of the present invention, as follows: the component of the normal force Y is 30000N; the pitching moment Mz component is 3000 N.m; the component of the axial force X is 1000N; the component of the roll moment Mx is 500 N.m; the lateral force Z component is 1000N; the yaw moment My component is 3000 n.m.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and are not limited. Although the present invention has been described in detail with reference to the embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (8)
1. A load mismatched six-component high moment balance, comprising: a mould connection (1), a measuring element assembly (11) and a fixed connection (6);
the measuring element assembly (11) is arranged between the mould connection piece (1) and the fixed connection piece (6);
the measuring element assembly (11) comprises: a torque measuring element, a first force measuring element, a second force measuring element, a first transition (8), a second transition (9) and a third transition (10);
the tail end of the first transition section (8), the starting end of the second transition section (9), the tail end of the second transition section (9) and the starting end of the third transition section (10) are mutually connected end to form a serial structure;
the torque measuring elements are arranged at the beginning of the first transition (8), the first force measuring elements are arranged at the beginning and the end of the second transition (9), and the second force measuring elements are arranged at the end of the third transition (10).
2. The load unmatched six component large moment balance according to claim 1, wherein the moment measuring element comprises: pitch and roll measuring elements (2) and yaw measuring elements (3);
the first force measuring element comprises a lateral force Z component measuring element (4) and an axial force X component measuring element (5);
the second force measuring element comprises a normal force Y component measuring element (7);
the starting end of the first transition section (8) is connected with the model connecting piece (1) through the pitching and rolling measuring element (2) and the yawing measuring element (3) which are arranged on the first transition section, and the pitching and rolling measuring element (2) and the yawing measuring element (3) are distributed and arranged in a circle;
lateral force Z component measuring elements (4) are respectively arranged on the left side and the right side of the starting end of the second transition section (9); the upper side and the lower side of the tail end of the second transition section (9) are respectively provided with an axial force X component measuring element (5);
at least one multi-group statically indeterminate beam is sleeved on the third transition section (10) and sleeved in the fixed connecting piece (6) to form an integrated non-detachable spoke type structure, and the at least one multi-group statically indeterminate beam is close to the fixed connecting piece (6).
3. The load-mismatched six-component large-moment balance according to claim 2, characterized in that the pitch and roll measuring elements (2) further comprise: a first measuring element (21) and a second measuring element (22); wherein the first measuring element (21) and the second measuring element (22) jointly measure the pitch moment Mz component load and the roll moment Mx component load of the aerodynamic load;
the yaw measuring element (3) further comprises: a third measuring element (31) and a fourth measuring element (32); wherein the third measuring element (31) and the fourth measuring element (32) together measure the yaw moment My component load of the aerodynamic load;
the first measuring element (21), the second measuring element (22), the third measuring element (31) and the fourth measuring element (32) are distributed at 90 degrees in the circumferential direction, and the four measuring elements are all arranged at the starting end of the first transition section (8).
4. The load-mismatched six-component large moment balance according to claim 2, characterized by the lateral force Z-component measuring element (4) for measuring the lateral force Z-component load of the pneumatic load;
the axial force X component measuring element (5) is used for measuring the axial force X component load of the pneumatic load.
5. The load-unmatched six-component large-moment balance according to claim 2, wherein resistance strain gauges are respectively arranged on the pitch and roll measuring element (2), the yaw measuring element (3), the lateral force Z-component measuring element (4), the axial force X-component measuring element (5) and the normal force Y-component measuring element (7) to form a Wheatstone full bridge forming measuring circuit.
6. The load-unmatched six-component large moment balance according to claim 2, wherein the cross section of the second transition section (9) is of a cylindrical structure, the left side and the right side of the starting end of the second transition section (9) along the horizontal direction are provided with first L-shaped platforms, and the upper side and the lower side of the tail end of the second transition section (9) along the vertical direction are respectively provided with second L-shaped platforms;
a lateral force Z component measuring element (4) is arranged on each first L-shaped platform; an axial force X component measuring element (5) is arranged on each second L-shaped platform;
the lateral force Z component measuring element (4) and the axial force X component measuring element (5) are both of a multi-piece statically indeterminate beam structure.
7. The load-unmatched six-component large moment balance according to claim 6, wherein the lateral force Z-component measuring element (4) comprises 4 superposed hyperstatic beams arranged in bilateral symmetry;
the axial force X component measuring element (5) comprises 4 superposed hyperstatic beams which are arranged in an up-down symmetrical mode.
8. The load mismatched six-component high moment balance according to claim 2, wherein: in the spoke type structure, the third transition section (10) is an inner circle, the fixed connecting piece (6) is an outer circle, at least one plurality of groups of statically indeterminate beams which are distributed in a circumferential manner are arranged between the inner circle and the outer circle of the spoke type structure, the plurality of groups of statically indeterminate beams on the same section are distributed in a structure shaped like a Chinese character 'mi', and 8 groups of statically indeterminate beams which are distributed in a circumferential manner are distributed on the same section along the axial direction;
among 8 groups of statically indeterminate beams distributed in a shape like a Chinese character 'mi', 4 groups of statically indeterminate beams positioned at an X-shaped position are used as normal force Y component measuring elements (7), namely measuring beams, for measuring the pneumatic load of the normal force Y component;
4 sets of statically indeterminate beams located at the cross-shaped position were used as support beams.
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| CN202110997608.6A CN113834626B (en) | 2021-08-27 | 2021-08-27 | Six-component high-torque balance with unmatched loads |
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| CN202110997608.6A CN113834626B (en) | 2021-08-27 | 2021-08-27 | Six-component high-torque balance with unmatched loads |
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| CN113834626B CN113834626B (en) | 2023-06-09 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114323546A (en) * | 2022-03-07 | 2022-04-12 | 中国空气动力研究与发展中心高速空气动力研究所 | High-sensitivity rod-type six-component wind tunnel test balance inlaid with different materials |
| CN116242577A (en) * | 2023-05-06 | 2023-06-09 | 中国空气动力研究与发展中心低速空气动力研究所 | Wind tunnel cluster special balance and wind tunnel system for cluster measurement |
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| CN118090132A (en) * | 2024-04-23 | 2024-05-28 | 中国空气动力研究与发展中心低速空气动力研究所 | Test device and test method for measuring aerodynamic and operating characteristics of propeller |
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| CN114323546A (en) * | 2022-03-07 | 2022-04-12 | 中国空气动力研究与发展中心高速空气动力研究所 | High-sensitivity rod-type six-component wind tunnel test balance inlaid with different materials |
| CN116242577A (en) * | 2023-05-06 | 2023-06-09 | 中国空气动力研究与发展中心低速空气动力研究所 | Wind tunnel cluster special balance and wind tunnel system for cluster measurement |
| CN116242577B (en) * | 2023-05-06 | 2023-07-07 | 中国空气动力研究与发展中心低速空气动力研究所 | Wind tunnel cluster special balance and wind tunnel system for cluster measurement |
| CN116929702A (en) * | 2023-09-15 | 2023-10-24 | 中国人民解放军32806部队 | Aerodynamics test balance device and test method for aircraft |
| CN116929702B (en) * | 2023-09-15 | 2023-12-29 | 中国人民解放军32806部队 | Aerodynamics test balance device and test method for aircraft |
| CN118090132A (en) * | 2024-04-23 | 2024-05-28 | 中国空气动力研究与发展中心低速空气动力研究所 | Test device and test method for measuring aerodynamic and operating characteristics of propeller |
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