CN115574914A - Calibration device and calibration method for low-speed wind tunnel external air bridge balance - Google Patents
Calibration device and calibration method for low-speed wind tunnel external air bridge balance Download PDFInfo
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- CN115574914A CN115574914A CN202211171475.8A CN202211171475A CN115574914A CN 115574914 A CN115574914 A CN 115574914A CN 202211171475 A CN202211171475 A CN 202211171475A CN 115574914 A CN115574914 A CN 115574914A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
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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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- 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
Abstract
The invention provides a calibration device and a calibration method of a low-speed wind tunnel external air bridge balance, and belongs to the technical field of calibration and detection. The problem of current calibration equipment can not improve the calibration accuracy and the accuracy of air bridge balance in the calibration process is solved. The semi-modular balance loading device comprises a power simulation semi-modular balance, a cross loading beam, a pulley block, a stainless steel strip and a loading frame, wherein the power simulation semi-modular balance is installed on a balance transition support, the balance transition support is installed on a bottom plate of the loading frame, the cross loading beam is connected with the power simulation semi-modular balance, Y-direction pulley support frames are symmetrically installed on two opposite sides of a middle cross beam of the loading frame, an X-direction pulley support frame is installed on one side of the middle cross beam and is perpendicular to the Y-direction pulley support frame, and the pulley block is installed at two ends of the Y-direction pulley support frame respectively. The dynamic simulation test device is mainly used for dynamic simulation tests of aircrafts.
Description
Technical Field
The invention belongs to the technical field of calibration and detection, and particularly relates to a calibration device and a calibration method of a low-speed wind tunnel external air bridge balance.
Background
At present, dynamic simulation tests are one of the main means of aircraft design. The core equipment of the dynamic simulation test is an air bridge balance, and compressed air drives a power system through the air bridge in the test process, so that weak interference is generated on the balance.
Disclosure of Invention
In view of this, the present invention is directed to provide a calibration apparatus for a low-speed wind tunnel external air bridge balance and a calibration method thereof, so as to solve the problem that the existing calibration device cannot improve the calibration accuracy and accuracy of the air bridge balance during the calibration process.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a calibrating device of outer formula air bridge balance of low-speed wind-tunnel, includes power simulation half module balance, cross load beam, assembly pulley, stainless steel band and loading frame, power simulation half module balance installs on balance transition support, balance transition support installs on the bottom plate of loading frame, cross load beam is connected with power simulation half module balance, equal symmetry installs two Y to the pulley support frame on the middle cross beam Y axle positive and negative direction of loading frame, Y to the pulley support frame is equipped with four, install an X to the pulley support frame on the X axle positive direction of middle cross beam, the assembly pulley is installed to the one end that is located the loading frame outside of Y to the pulley support frame, the assembly pulley is installed to the one end that the X is located the loading frame outside of X to the pulley support frame, the stainless steel band is installed to the assembly pulley, the stainless steel band is equipped with three, the one end that is located the stainless steel band on the X to the pulley support frame is connected with short weight pole and the other end is installed on cross load beam, the cross load beam tip is all installed through two relative Y to the assembly pulley support frame on every Y axle positive direction.
Furthermore, a first steel belt lug connecting seat and a second steel belt lug connecting seat are respectively installed at two opposite ends of the cross loading beam, and two stainless steel belts positioned on the Y-direction pulley supporting frame respectively penetrate through the first steel belt lug connecting seat and the second steel belt lug connecting seat to be installed on the pulley block.
Furthermore, the lower end face of the parallel part of the cross loading beam and the X-direction pulley support frame is provided with an X-direction connecting lug through an X-direction lug connecting piece, and a stainless steel band positioned on the X-direction pulley support frame is connected with the X-direction connecting lug.
Furthermore, the X-direction connecting lug is connected with the stainless steel band through a steel band clamp.
Furthermore, the four ends of the cross-shaped loading beam are connected with the loading rod through X-direction loading rod connecting pieces.
Furthermore, a first joint bearing is arranged at the joint of the X-direction loading rod connecting piece and the loading rod.
Furthermore, the bottom plate is arranged on a bottom plate supporting frame, and the bottom plate supporting frame is arranged at the bottom of the loading frame.
A calibration method of a calibration device of a low-speed wind tunnel external air bridge balance comprises the following steps:
step 1: pushing the dynamic simulation half-mode balance to the center position of the loading device from the positive X direction to the negative X direction;
step 2: mounting the dynamic simulation half-mode balance on a balance transition support;
and step 3: and (3) carrying out loading calibration on the dynamic simulation half-die balance through the combination of 9 loading points on the loading frame.
Compared with the prior art, the invention has the beneficial effects that: the invention mainly finishes the load loading of force and moment through 5 pulley loading points and 4 cross beam loading points, and the precision and the accuracy of the calibration are greatly improved by using the calibration device for the dynamic simulation half-mode balance.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a three-dimensional schematic view of a calibration device for a low-speed wind tunnel external air bridge balance according to the present invention;
FIG. 2 is a front view of a calibration device for a low speed wind tunnel external air bridge balance according to the present invention;
FIG. 3 is a side view of a calibration device for a low speed wind tunnel external air bridge balance according to the present invention;
fig. 4 is a top view of the calibration device of the low-speed wind tunnel external air bridge balance according to the present invention. 1-a second steel strip lug connecting seat; 2-Y direction connecting lug; 3-a cross loading beam; 4-dynamic simulation of a half-mold balance; 5-X direction ear piece connecting piece; 6-X direction connecting lug; 7-a steel band clamp; a 8-X direction loading rod connecting piece; 9-a first steel strip tab connection seat; 10-a middle cross beam; 11-X direction pulley support frame; 12-balance transition support; 13-short weight bar; 14-first angle steel; 15-a bottom plate support frame; 16-a base plate; 17-stainless steel band; 18-second angle steel; 19-a pulley block; a 20-Y direction pulley support frame; 21-weight rod; 22-load lever.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely explained below with reference to the drawings in the embodiments of the present invention. It should be noted that, in the present invention, the embodiments and features of the embodiments may be combined with each other without conflict, and the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments.
The embodiment is described with reference to fig. 1 to 4, the calibration device for the low-speed wind tunnel external air bridge balance comprises a dynamic simulation half-mode balance 4, a cross loading beam 3, pulley blocks 19, stainless steel strips 17 and a loading frame, wherein the dynamic simulation half-mode balance 4 is installed on a balance transition support 12, the balance transition support 12 is installed on a bottom plate 16 of the loading frame, the cross loading beam 3 is connected with the dynamic simulation half-mode balance 4, two Y-direction pulley support frames 20 are symmetrically installed on a middle cross beam 10 of the loading frame in the positive and negative directions of a Y axis, four Y-direction pulley support frames 20 are provided, an X-direction pulley support frame 11 is installed on the middle cross beam 10 in the positive and negative directions, one end of the Y-direction pulley support frame 20 located outside the loading frame is provided with the pulley block 19, one end of the X-direction pulley support frame 11 located outside the loading frame is provided with the stainless steel strip 17, three stainless steel strips 17 are provided with the stainless steel strips 17, one end of the stainless steel strip 17 located on the X-direction pulley support frame 11 is connected with a short weight rod 13 and the other end is installed on the loading beam 3, two stainless steel strip support frames 22 are installed on the cross loading beam in the positive and each cross loading frame 20 in the negative direction, and one end of the cross-direction loading frame is installed with the stainless steel strip 17.
The dynamic simulation half-mode balance 4 is pushed into the center of the loading device from the positive X direction to the negative X direction, the dynamic simulation half-mode balance 4 is located right above a balance transition support 12 and then is positioned by pins and connected with bolts, the dynamic simulation half-mode balance 4 is installed on the balance transition support 12, the dynamic simulation half-mode balance 4 and a loading frame are ensured to be located on the same coordinate axis, the dynamic simulation half-mode balance 4 and the loading frame are connected together by bolts, then loading calibration is carried out through five pulley blocks 19 and four loading rods 22 on a cross loading beam 3, weight loading is carried out in the adopted loading mode, and the calibration device carries out calibration through 9 loading points, so that the calibration precision and accuracy are greatly improved, and the interference caused by an air bridge is reduced.
The balance fixing installation seat is lowered to the ground, transverse and longitudinal channel steel is adopted for connection so as to strengthen the fixing rigidity of the base, the angle steel is adopted for connecting the bottom plate 16, and the balance transition support 12 is adopted for correcting the height of the balance when the whole die and the half die are calibrated.
The cross loading beam comprises a cross loading beam 3, a pulley block 19, a first steel belt lug connecting seat 9, a second steel belt lug connecting seat 1, two stainless steel belts 17, an X-direction connecting lug 6, a stainless steel belt 17, a steel belt clamp 7 and a stainless steel belt 17, wherein the two stainless steel belts 17 are arranged on a Y-direction pulley supporting frame 20 and respectively penetrate through the first steel belt lug connecting seat 9 and the second steel belt lug connecting seat 1 to be installed on the pulley block 19, the cross loading beam 3 and the X-direction pulley supporting frame 11 are parallel, the lower end face of the cross loading beam is provided with the X-direction connecting lug 6 through the X-direction connecting piece 5, the X-direction connecting lug 6 is connected with the stainless steel belt 17 through the steel belt clamp 7, the stainless steel belt 17 is a steel belt 38mm wide and 0.2mm thick, four ends of the loading cross loading beam 3 are connected with a loading rod 22 through the X-direction loading rod connecting piece 8, a bottom plate 16 is installed on the bottom plate supporting frame 15, and the bottom plate supporting frame is installed at the bottom of the loading frame.
Referring to fig. 1-4 to illustrate the embodiment, a first joint bearing is installed at the joint of the X-direction loading rod connecting member 8 and the loading rod 22, a weight tray is connected to the bottom ends of the weight rods 21 and the short weight rods 13, and a second joint bearing is installed at the top ends of the weight rods 21 and the short weight rods 13.
The method is characterized in that interference elimination processing is carried out at a lifting force vertical loading point so as to eliminate interference on balance Y and X-direction forces and moment generated by the balance Y and X-direction forces brought by lifting force loading, and an interference elimination sheet or an interference elimination ring is machined on a whole material in a traditional interference elimination mode. The joint bearing is adopted at present, the fit is clearance fit, the friction force is spherical sliding friction, under the condition of good spherical lubrication, the damping force is 0.05-0.1N and is far smaller than the deformation interference force, the interference elimination effect is better, the loading load Y =150kg selects the model JF12, the maximum allowable tension is 1700kg, the weight rod 21 is in M12 threaded connection, the interference problem also exists during Y-direction force and X-direction force loading, if the joint bearing is adopted for connection, the connection position is too flexible, the dead weight of the steel belt clamp 7 and the stainless steel belt 17 can generate the waist collapse phenomenon, and therefore the traditional interference elimination mode is adopted.
A calibration method of a calibration device of a low-speed wind tunnel external air bridge balance comprises the following steps:
step 1: pushing the dynamic simulation half-mode balance 4 to the center of the loading device from the positive X direction to the negative X direction;
step 2: mounting the dynamic simulation half-mode balance 4 on a balance transition support 12;
and step 3: the dynamic simulation half-die balance 4 is loaded and calibrated through the combination of 9 loading points on the loading frame, and the loading calibration is carried out through five pulley blocks 19 and four loading rods 22 on the cross loading beam 3, and the adopted loading modes are all loaded through weights.
The embodiments of the invention disclosed above are intended merely to aid in the explanation of the invention. The examples are not intended to be exhaustive or to limit the invention to the precise forms disclosed. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best understand the invention for and utilize the invention.
Claims (10)
1. The utility model provides a calibrating device of external formula air bridge balance of low-speed wind-tunnel which characterized in that: including power simulation half-mode balance (4), cross load beam (3), assembly pulley (19), stainless steel strip (17) and loading frame, install on balance transition support (12) power simulation half-mode balance (4), install on loading frame's bottom plate (16) balance transition support (12), cross load beam (3) are connected with power simulation half-mode balance (4), equal symmetry installs two Y to pulley support frame (20) on loading frame's intermediate beam (10) Y axle positive and negative direction, Y is equipped with four to pulley support frame (20), install one X to pulley support frame (11) on intermediate beam's (10) X axle positive direction, assembly pulley (19) are installed to the outside one end that is located loading frame of Y to pulley support frame (20), X is located the outside one end of loading frame and installs assembly pulley (19) to pulley support frame (11), stainless steel strip (17) are installed to assembly pulley (19), stainless steel strip (17) are equipped with three assembly pulleys, the one end that is located stainless steel strip (17) on X is connected with stainless steel strip support frame (11) is connected with cross pulley assembly pulley (19) and installs on every Y is loaded on stainless steel strip (13) and every Y is loaded by one end of stainless steel strip (17) and two relative weight loading beam (17) is installed on loading frame (13) positive and every Y is installed on stainless steel strip negative pole (17) negative direction (3) The four ends of the cross loading beam (3) are provided with loading rods (22).
2. The calibration device for the low-speed wind tunnel external air bridge balance according to claim 1, wherein: the two opposite ends of the cross loading beam (3) are respectively provided with a first steel belt lug connecting seat (9) and a second steel belt lug connecting seat (1), and two stainless steel belts (17) positioned on the Y-direction pulley supporting frame (20) respectively penetrate through the first steel belt lug connecting seat (9) and the second steel belt lug connecting seat (1) and are arranged on the pulley block (19).
3. The calibration device for the low-speed wind tunnel external air bridge balance according to claim 1, wherein: the cross loading beam (3) and the lower end face of the parallel part of the X-direction pulley supporting frame (11) are provided with an X-direction connecting lug (6) through an X-direction lug connecting piece (5), and a stainless steel band (17) positioned on the X-direction pulley supporting frame (11) is connected with the X-direction connecting lug (6).
4. The calibration device for the low-speed wind tunnel external air bridge balance according to claim 3, wherein: the X-direction connecting lug (6) is connected with a stainless steel belt (17) through a steel belt clamp (7).
5. The calibration device for the low-speed wind tunnel external air bridge balance according to claim 1, wherein: four ends of the cross loading beam (3) are connected with the loading rod (22) through X-direction loading rod connecting pieces (8).
6. The calibration device for the low-speed wind tunnel external air bridge balance according to claim 5, wherein: and a first joint bearing is arranged at the joint of the X-direction loading rod connecting piece (8) and the loading rod (22).
7. The calibration device for the low-speed wind tunnel external air bridge balance according to claim 1, wherein: the bottom plate (16) is arranged on a bottom plate support frame (15), and the bottom plate support frame (15) is arranged at the bottom of the loading frame.
8. The calibration device for the low-speed wind tunnel external air bridge balance according to claim 7, wherein: the bottom ends of the weight rods (21) and the short weight rods (13) are connected with weight plates, and the top ends of the weight rods (21) and the short weight rods (13) are provided with second joint bearings.
9. The calibration device for the low-speed wind tunnel external air bridge balance according to claim 7, wherein: the bottom plate (16) is connected with a bottom plate support frame (15) through second angle steel (18), and the bottom plate support frame (15) is connected with the loading frame through first angle steel (14).
10. A method for calibrating a calibration device for a low-speed wind tunnel external air bridge balance according to claim 1, wherein the method comprises the following steps: it comprises the following steps:
step 1: pushing the dynamic simulation half-mode balance (4) to the center position of the loading device from the positive X direction to the negative X direction;
step 2: mounting the dynamic simulation half-mode balance (4) on a balance transition support (12);
and step 3: and (3) carrying out loading calibration on the dynamic simulation half-die balance (4) through the combination of 9 loading points on the loading frame.
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| CN202211171475.8A CN115574914B (en) | 2022-09-26 | 2022-09-26 | Calibration device and calibration method for low-speed wind tunnel external air bridge balance |
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Cited By (1)
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| CN117091800B (en) * | 2023-10-17 | 2024-01-02 | 中国空气动力研究与发展中心高速空气动力研究所 | Full-automatic six-degree-of-freedom balance calibration system for low-temperature balance calibration |
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| CN115574914B (en) | 2023-04-14 |
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