A precise and repeated positioning device and debugging method for movable wind tunnel test equipment

Abstract

A device and debugging method for precise and repeated positioning of movable wind tunnel test equipment belongs to the field of wind tunnel test equipment. The present invention includes a front test section, a mobile test section, a rear test section, an equipment pre-positioning structure, an equipment inlet end positioning structure, and an equipment outlet end positioning structure. The front and rear sides of the mobile test section are respectively provided with a front test section and a rear test section. The bottom of the mobile test section is provided with an equipment pre-positioning structure. The inlet end of the mobile test section is positioned and connected to the front test section through the equipment inlet end positioning structure, and the outlet end of the mobile test section is positioned and connected to the rear test section through the equipment outlet end positioning structure. The purpose of the research and development of the present invention is to solve the problem of precise and repeated positioning of mobile wind tunnel test equipment, while being able to withstand the aerodynamic force of the wind tunnel test. The structure is simple and reliable, can realize the function of precise and repeated positioning of the test equipment, and can withstand the aerodynamic force of the test equipment.

Description

Technical Field

[0001] The invention relates to a precise and repeated positioning device for movable wind tunnel test equipment and a debugging method, belonging to the field of wind tunnel test equipment. Background Art

[0002] In wind tunnel tests, when there are multiple identical test equipment, the appropriate equipment must be selected according to the test needs, which involves equipment replacement. At the same time, there are high precision requirements for the positioning of the equipment. For example, some wind tunnels are equipped with multiple nozzles to meet different test needs. The positioning accuracy requirements for the nozzle and the front and rear sections are high, requiring no adverse airflow step difference and the step difference in the flow of air to be no more than 0.2mm. After the nozzle is replaced, it must be able to easily achieve accurate and repeated positioning. The test equipment will be subject to large axial aerodynamic forces and lateral impacts during the test, and the foundation or equipment connected to the foundation needs to withstand the aerodynamic forces to fix the test equipment. In response to such situations, it is urgent to propose a precise and repeated positioning device and debugging method for movable wind tunnel test equipment. After debugging, it can achieve the function of precise and repeated positioning of the test equipment and can withstand the aerodynamic forces of the test equipment. Summary of the Invention

[0003] This invention was developed to address the problem of accurately and repeatedly positioning mobile wind tunnel test equipment while simultaneously meeting the requirements for withstanding the aerodynamic forces of wind tunnel testing. The following is a brief overview of the invention to provide a basic understanding of certain aspects of the invention. It should be understood that this overview is not an exhaustive overview of the invention. It is not intended to identify key or important aspects of the invention, nor is it intended to limit the scope of the invention.

[0004] The technical solution of the present invention:

[0005] Solution 1: A precise and repeatable positioning device for movable wind tunnel test equipment, comprising a front test section, a movable test section, a rear test section, an equipment pre-positioning structure, an equipment inlet end positioning structure, and an equipment outlet end positioning structure. The front test section and the rear test section are respectively provided on the front and rear sides of the movable test section. The equipment pre-positioning structure is provided at the bottom of the movable test section. The inlet end of the movable test section is connected to the front test section via the equipment inlet end positioning structure, and the outlet end of the movable test section is connected to the rear test section via the equipment outlet end positioning structure.

[0006] The pre-positioning structure of the equipment includes a limit switch, a block, a transverse reduction motor, a transverse track and a transverse wheel. The transverse track is arranged along the axial direction of the vertical moving test section. A transverse wheel is rotatably installed on the moving test section. A transverse reduction motor is installed below the moving test section. The output end of the transverse reduction motor is connected to the transverse wheel and drives the transverse wheel to move and transport on the transverse track. A block is installed on the transverse track, and a limit switch is installed on the block. When the transverse wheel is driven to move to the preset distance of the limit switch, the limit switch senses and sends a signal to control the transverse reduction motor to stop rotating.

[0007] Preferably, the stopper is provided with an arc surface, the upper portion of the arc surface is a vertical surface, the radius of the arc surface is larger than the radius of the transverse wheel, and the limit switch is installed on the vertical surface and does not protrude from the vertical surface.

[0008] Preferably: the equipment pre-positioning structure also includes an axial reduction motor, a longitudinal track and a longitudinal wheel. The longitudinal track is arranged in a direction parallel to the axis of the moving test section. The longitudinal wheel is rotatably installed at the bottom of the moving test section. The axial reduction motor is installed at the bottom of the moving test section. The output end of the axial reduction motor is connected to the longitudinal track and drives the longitudinal wheel to walk and transport on the longitudinal track. The transverse reduction motor is fixedly installed at the bottom of the longitudinal track. The transverse wheel is rotatably installed at the bottom of the longitudinal track. The transverse track is arranged vertically below the longitudinal track.

[0009] Preferably: the positioning structure at the inlet end of the equipment includes two limit blocks, screws and pins, and a limit block is fixedly installed on the left and right sides of the outlet end of the front test section by screws and pins respectively, and a continuous front alignment plane and a front adjustment inclined plane are processed on the end face of the limit block on one side close to the inlet end of the moving test section, and a continuous rear adjustment inclined plane and a rear alignment plane are processed on the end face of the inlet end of the moving test section close to the limit block, the front adjustment inclined plane and the rear adjustment inclined plane are parallel, and the front alignment plane and the rear alignment plane slide and fit together.

[0010] Preferably: the positioning structure at the outlet end of the equipment includes a support, a rectangular hole, a double-bevel pin, a lift and a reduction motor, a lift fixing seat and a load-bearing frame, a support is symmetrically arranged on the left and right sides below the outlet end of the moving test section, a rectangular hole is processed on the support, and a double-bevel pin is arranged directly below the rectangular hole, one bevel of the double-bevel pin is located on the side close to the axis of the moving test section, and the other bevel of the double-bevel pin faces the inlet end of the moving test section, corresponding to the two bevels of the double-bevel pin, the inner side surface of the bottom of the rectangular hole is also processed into a bevel aligned with the two bevels of the double-bevel pin and parallel to the two bevels, a lift is fixedly installed at the bottom of the double-bevel pin, the lift is connected to the reduction motor, and the reduction motor drives the double-bevel pin to perform lifting and lowering movements through the lift.

[0011] Preferably: the middle part of the double-bevel pin is a square column, the lower part of the double-bevel pin is a cylinder, the cross-sectional end of the cylinder is processed into a single ear piece, a hole is opened on the single ear piece, and the pin is passed through the hole for connecting the elevator, a cylindrical hole is processed on the upper part of the elevator fixing seat, the double-bevel pin is located in the cylindrical hole, the cylindrical side of the double-bevel pin and the cylindrical hole are clearance-fitted, the elevator fixing seat is fixedly installed on the load-bearing frame, and the load-bearing frame is fixed on the ground foundation.

[0012] Solution 2: A method for precise and repeated debugging of a movable wind tunnel test equipment is implemented based on the precise and repeated positioning device for movable wind tunnel test equipment described in Solution 1, and includes the following steps:

[0013] Step 1: The front test section is fixed and serves as a positioning basis. A mobile device is provided at the bottom of the rear test section, and the mobile device drives the rear test section to move in a direction parallel to the axis of the front test section.

[0014] Step 2: Control the transverse reduction motor to move the mobile test section along the transverse track into the test station and approach the limit switch. The limit switch senses and sends a signal. After receiving the signal, the transverse reduction motor stops rotating, and the transverse wheel smoothly transitions to the block. The vertical surface of the block completely blocks the transverse wheel, stopping the mobile test section and completing the preliminary positioning of the mobile test section.

[0015] Step 3: Control the axial reduction motor to move the mobile test section along the longitudinal track toward the front test section until the end faces of the two sections are in contact. As the mobile test section approaches the front test section, the front adjustment slope of the limit block gradually guides the entrance end of the mobile test section to the predetermined position, thus achieving secondary positioning.

[0016] Step 4. When the reduction motor drives the double-bevel pin to rise through the elevator, the two bevels of the double-bevel pin act at the same time to apply force to the equipment forward and to the middle. The forward force makes the mobile test section fit tightly with the front test section. The two double-bevel pins apply force to the middle at the same time to fix the outlet of the mobile test section. The double-bevel pin transitions through the bevels of the double-bevel pin until the double-bevel pin fits with the inner wall of the rectangular hole. The double-bevel pin can laterally position the outlet of the mobile test section. At the same time, the forward force cooperates with the front test section in front to realize the function of fixing the axial position of the mobile test section, and withstands its aerodynamic load to achieve final positioning.

[0017] The present invention has the following beneficial effects:

[0018] 1. After the equipment pre-positioning structure, equipment inlet end positioning structure, and equipment outlet end positioning structure of the present invention are debugged and positioned to meet the positioning accuracy requirements of the test equipment, when repeatedly entering the working position, the limit switch initially positions the test equipment, and the deviation between the movable test section and the front test section and the rear test section can be reduced and controlled. The repeated positioning accuracy is high, the structure is simple, and the operation is easy;

[0019] 2. The device inlet and outlet positioning structures of the present invention further accurately adjust the lateral position of the movable test section so that there is no adverse airflow step difference at the interface between the movable test section and the front and rear test sections;

[0020] 3. The positioning structure at the outlet end of the device of the present invention provides a certain axial force to make the movable test section close to the front test section, thereby achieving axial fixation of the movable test section;

[0021] 4. The present invention controls the reduction motor to drive the elevator, extends the double-bevel pin into the rectangular hole, and the side walls of the two are completely fitted together, so as to realize the lateral and axial positioning and load bearing of the equipment, with a simple and reliable structure and easy operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural diagram of a precise and repeatable positioning device for a movable wind tunnel test equipment;

[0023] Figure 2 This is a diagram of the use status of a precise and repeatable positioning device for a movable wind tunnel test equipment;

[0024] Figure 3 This is a diagram of the coordination and installation of a precise and repeatable positioning device for a movable wind tunnel test equipment;

[0025] Figure 4 yes Figure 3 BB cross-section diagram;

[0026] Figure 5 This is a diagram showing the coordinated installation of the transverse rail and transverse wheel of the present invention;

[0027] Figure 6 yes Figure 5 Side view of;

[0028] Figure 7 yes Figure 5 A top view of

[0029] Figure 8 yes Figure 7 AA cross-sectional view;

[0030] Figure 9 yes Figure 2 Magnified view of point Ⅰ;

[0031] Figure 10 yes Figure 3 Magnified view of point II;

[0032] Figure 11 yes Figure 3 H-direction view;

[0033] Figure 12 yes Figure 4 CC cross-sectional view;

[0034] Figure 13 yes Figure 12 DD cross-sectional view;

[0035] Figure 14 yes Figure 4 Enlarged view of point E.

[0036] In the figure: 1-front test section, 2-moving test section, 3-rear test section, 4-limit switch, 5-stopper, 6-lateral reduction motor, 7-lateral track, 8-lateral wheel, 9-axial reduction motor, 10-longitudinal track, 11-longitudinal wheel, 12-limit block, 13-pin, 14-support, 15-rectangular hole, 16-double bevel pin, 17-elevator, 18-reduction motor, 19-elevator fixing seat, 20-load-bearing frame, 21-rear adjustment bevel, 22-rear alignment plane, 51-arc surface, 52-vertical surface, 121-front alignment plane, 122-front adjustment bevel. DETAILED DESCRIPTION

[0037] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is described below using specific embodiments shown in the accompanying drawings. However, it should be understood that these descriptions are merely illustrative and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concepts of the present invention.

[0038] The connections mentioned in the present invention are divided into fixed connections and detachable connections. The fixed connection refers to a non-detachable connection, including but not limited to conventional fixed connection methods such as hem connection, rivet connection, adhesive connection, and welding connection. The detachable connection refers to but not limited to conventional detachable connection methods such as threaded connection, snap connection, pin connection, and hinge connection. When the specific connection method is not clearly specified, it is assumed that at least one connection method can always be found among the existing connection methods to achieve the function. Those skilled in the art can choose according to their needs. For example, a welded connection is selected for a fixed connection, and a hinge connection is selected for a detachable connection.

[0039] Specific implementation method 1: Combination Figures 1-14This embodiment is described. This embodiment is a precise and repeated positioning device for movable wind tunnel test equipment, comprising a front test section 1, a movable test section 2, a rear test section 3, an equipment pre-positioning structure, an equipment inlet end positioning structure, and an equipment outlet end positioning structure. The front test section 1 and the rear test section 3 are respectively provided on the front and rear sides of the movable test section 2. The bottom of the movable test section 2 is provided with an equipment pre-positioning structure. The inlet end of the movable test section 2 is positioned and connected to the front test section 1 through the equipment inlet end positioning structure, and the outlet end of the movable test section 2 is positioned and connected to the rear test section 3 through the equipment outlet end positioning structure.

[0040] The front test section 1 is fixed, and the movable test section 2 can move along its axial direction and perpendicular to its axial direction. The movable test section 2 needs to be repeatedly positioned. The rear test section 3 can move along the axial direction parallel to the movable test section 2. After adjustment and accurate positioning, no further adjustment is required later.

[0041] The pre-positioning structure of the equipment includes a limit switch 4, a block 5, a transverse reduction motor 6, a transverse rail 7 and a transverse wheel 8. The transverse rail 7 is arranged along the axis direction of the vertical moving test section 2. A transverse wheel 8 is rotatably installed under the moving test section 2. A transverse reduction motor 6 is installed under the moving test section 2. The output end of the transverse reduction motor 6 is connected to the transverse wheel 8, and drives the transverse wheel 8 to move and transport on the transverse rail 7. A block 5 is installed on the transverse rail 7, and a limit switch 4 is installed on the block 5. When the transverse wheel 8 is driven to move to the preset distance of the limit switch 4, the limit switch 4 senses and sends a signal to control the transverse reduction motor 6 to stop rotating.

[0042] The limit switch 4 is of inductive type and has its own external thread. The mobile test section 2 is kept at a certain distance from the front test section 1 and the rear test section 3, and the transverse reduction motor 6 is controlled to enter the test station along the transverse track 7. When installing the mobile test section 2, the stop position of the mobile test section 2 is manually controlled to align it with the front test section 1 and the rear test section 3. The position of the limit switch 4 is determined at this position. If the position deviation of the mobile test section 2 is confirmed to be within the expected range, the position of the limit switch 4 is considered to be appropriate.

[0043] The stopper 5 is provided with an arc surface 51, the radius of the arc surface 51 is larger than the radius of the transverse wheel 8, the arc surface 51 of the stopper 5 is tangent to the transverse track 7, and the transverse wheel 8 can smoothly transition to the arc surface 51 of the stopper 5. As the movable test section 2 moves further, the resistance on the arc surface 51 gradually increases. Above the arc surface 51 is a vertical surface 52, which completely blocks the movement of the movable test section 2. The limit switch 4 is installed on the vertical surface 52 and does not protrude from the vertical surface 52, that is, a threaded hole is opened on the vertical surface 52 of the stopper 5, and the limit switch 4 is directly screwed into the threaded hole and is not exposed. When the transverse wheel 8 contacts the vertical surface 52, it will not hit the limit switch 4. In addition to being used to install the limit switch 4, the stopper 5 is also used to prevent the movable test section 2 from continuing to move after the limit switch 4 fails.

[0044] The equipment pre-positioning structure also includes an axial reduction motor 9, a longitudinal rail 10 and a longitudinal wheel 11. The longitudinal rail 10 is arranged in a direction parallel to the axis of the mobile test section 2. The longitudinal wheel 11 is rotatably installed at the bottom of the mobile test section 2. The axial reduction motor 9 is installed at the bottom of the mobile test section 2. The output end of the axial reduction motor 9 is connected to the longitudinal rail 10 and drives the longitudinal wheel 11 to walk and transport on the longitudinal rail 10. The transverse reduction motor 6 is fixedly installed at the bottom of the longitudinal rail 10. The transverse wheel 8 is rotatably installed at the bottom of the longitudinal rail 10. The transverse rail 7 is arranged vertically below the longitudinal rail 10.

[0045] The positioning structure of the equipment inlet end includes two limit blocks 12, screws and pins 13. A limit block 12 is fixedly installed on the left and right sides of the outlet end of the front test section 1 by screws and pins 13 respectively. The end face of the limit block 12 on one side close to the inlet end of the moving test section 2 is processed with a continuous front alignment plane 121 and a front adjustment bevel 122. The end face of the inlet end of the moving test section 2 close to the limit block 12 is processed with a continuous rear adjustment bevel 21 and a rear alignment plane 22. The front adjustment bevel 122 and the rear adjustment bevel 21 are parallel and retain a certain distance. This distance needs to be greater than the deviation of the sensing positioning of the limit switch 4. The front alignment plane 121 and the rear alignment plane 22 slide and fit together. In the process of the moving test section 2 approaching the front test section 1 along the axial direction, the front adjustment bevel 122 and the rear adjustment bevel 21 gradually guide the inlet end of the moving test section 2 to the predetermined position.

[0046] When installing the limit block 12, control the axial reduction motor 9 to move the mobile test section 2 along the longitudinal track 10 toward the front test section 1 until the end faces of the two are aligned. Fine-tune the interface between the mobile test section 2 and the front test section 1 so that the step difference between the left and right sides of the end faces of the two are uniform. With the upper and lower sides of the front test section 1 as a reference, the height of the mobile test section 2 can be adjusted by adding gaskets or other methods to make the deviation of the upper and lower sides of the two uniform. With this state as a reference, install and fix the two limit blocks 12 to ensure that the front alignment plane 121 of the limit block 12 and the rear alignment plane 22 of the mobile test section 2 are well aligned.

[0047] The positioning structure of the equipment outlet end includes a support 14, a rectangular hole 15, a double-bevel pin 16, a lift 17, a reduction motor 18, a lift fixing seat 19, and a load-bearing frame 20. A support 14 is symmetrically arranged on the left and right sides below the outlet end of the mobile test section 2. A rectangular hole 15 is processed on the support 14, and a double-bevel pin 16 is arranged directly below the rectangular hole 15. One inclined surface of the double-bevel pin 16 is located on the side close to the axis of the mobile test section 2, and the other inclined surface of the double-bevel pin 16 faces the inlet end of the mobile test section 2, corresponding to the two inclined surfaces of the double-bevel pin 16. The inner side surface of the bottom of the rectangular hole 15 is also processed into an inclined surface aligned with the two inclined surfaces of the double-bevel pin 16 and parallel to the two inclined surfaces. A lift 17 is fixedly installed at the bottom of the double-bevel pin 16, and the lift 17 is connected to the reduction motor 18. The reduction motor 18 drives the double-bevel pin 16 to perform lifting and lowering movements through the lift 17. During installation, when the position of the 2# test equipment 2 is adjusted and the inlet end is accurately positioned and in contact with the front test section 1, the position of the double-bevel pin 16 is positioned and adjusted. The lifting and lowering of the double-bevel pin 16 is driven by the elevator 17 and the matching reduction motor 18.

[0048] The middle part of the double-bevel pin 16 is a square column, the lower part of the double-bevel pin 16 is a cylinder, the end of the cross-section of the cylinder is processed into a single ear piece, a hole is opened on the single ear piece, and a pin is passed through the hole for connecting the double ear piece at the end of the lever of the elevator 17. A cylindrical hole is processed on the upper part of the elevator fixing seat 19, and the double-bevel pin 16 is located in the cylindrical hole. The cylindrical side of the double-bevel pin 16 is clearance-fitted with the cylindrical hole. The elevator fixing seat 19 is fixedly installed on the load-bearing frame 20, and the load-bearing frame 20 is fixed on the ground foundation.

[0049] Specific implementation method 2: Combination Figures 1-14 This embodiment describes a method for accurately and repeatedly debugging a movable wind tunnel test equipment. This method is implemented based on the accurate and repeated positioning device for movable wind tunnel test equipment described in the first embodiment, and includes the following steps:

[0050] Step 1: The front test section 1 is fixed as a positioning basis, and a mobile device is provided at the bottom of the rear test section 3. The mobile device drives the rear test section 3 to move in a direction parallel to the axis of the front test section 1;

[0051] Step 2: Control the transverse reduction motor 6 to move the mobile test section 2 along the transverse track 7 into the test station and approach the limit switch 4. The limit switch 4 senses and sends a signal. After receiving the signal, the transverse reduction motor 6 stops rotating, and the transverse wheel 8 smoothly transitions to the stopper 5. The vertical surface of the stopper 5 completely blocks the transverse wheel 8, causing the mobile test section 2 to stop moving, completing the preliminary positioning of the mobile test section 2.

[0052] Step 3, control the axial reduction motor 9 to move the mobile test section 2 along the longitudinal track 10 toward the front test section 1 until the end faces of the two are in contact. In the process of the mobile test section 2 approaching the front test section 1, the front adjustment slope 122 of the limit block 12 gradually guides the entrance end of the mobile test section 2 to the predetermined position, thereby realizing secondary positioning.

[0053] In step 4, when the reduction motor 18 drives the double-bevel pin 16 to rise through the elevator 17, the two bevels of the double-bevel pin 16 act at the same time to apply force to the equipment forward and to the middle. The forward force makes the mobile test section 2 fit tightly with the front test section 1. The two double-bevel pins 16 apply force to the middle at the same time to fix the outlet of the mobile test section 2. Through the bevel transition of the double-bevel pin 16, the double-bevel pin 16 fits with the inner wall of the rectangular hole 15. The double-bevel pin 16 can laterally position the outlet of the mobile test section 2. At the same time, the forward force, in conjunction with the front test section 1 in front, realizes the function of fixing the axial position of the mobile test section 2, and withstands its aerodynamic load to achieve final positioning.

[0054] It should be noted that in the above embodiments, as long as the technical solutions are not contradictory, they can be permuted and combined. Those skilled in the art can exhaust all possibilities based on the mathematical knowledge of permutations and combinations. Therefore, the present invention will no longer describe the technical solutions after permutations and combinations one by one, but it should be understood that the technical solutions after permutations and combinations have been disclosed by the present invention.

[0055] The foregoing description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention are intended to be within the scope of protection of the present invention.

Claims

1. A precise and repeatable positioning device for a movable wind tunnel test equipment, characterized by: The invention comprises a front test section (1), a mobile test section (2), a rear test section (3), a device pre-positioning structure, a device inlet end positioning structure and a device outlet end positioning structure. The front test section (1) and the rear test section (3) are respectively provided on the front and rear sides of the mobile test section (2). The bottom of the mobile test section (2) is provided with the device pre-positioning structure. The inlet end of the mobile test section (2) is connected to the front test section (1) via the device inlet end positioning structure. The outlet end of the mobile test section (2) is connected to the rear test section (3) via the device outlet end positioning structure. The equipment pre-positioning structure comprises a limit switch (4), a stopper (5), a transverse reduction motor (6), a transverse track (7) and a transverse wheel (8), wherein the transverse track (7) is arranged along the axial direction of the vertical movable test section (2), a transverse wheel (8) is rotatably installed below the movable test section (2), a transverse reduction motor (6) is installed on the movable test section (2), an output end of the transverse reduction motor (6) is connected to the transverse wheel (8), and drives the transverse wheel (8) to move on the transverse track (7), a stopper (5) is installed on the transverse track (7), and a limit switch (4) is installed on the stopper (5), and when the transverse wheel (8) is driven to move to a preset distance of the limit switch (4), the limit switch (4) senses and sends a signal to control the transverse reduction motor (6) to stop rotating; The stopper (5) is provided with an arc surface (51), the radius of which is greater than the radius of the transverse wheel (8), and the arc surface (51) of the stopper (5) is tangent to the transverse track (7). The transverse wheel (8) can smoothly transition to the arc surface (51) of the stopper (5). As the movable test section (2) moves further, the resistance on the arc surface (51) gradually increases. Above the arc surface (51) is a vertical surface (52). The limit switch (4) is installed on the vertical surface (52) and does not protrude from the vertical surface (52). That is, a threaded hole is opened on the vertical surface (52) of the stopper (5), and the limit switch (4) is directly screwed into the threaded hole and is not exposed. When the transverse wheel (8) contacts the vertical surface (52), it will not hit the limit switch (4). In addition to installing the limit switch (4), the stopper (5) also prevents the movable test section (2) from continuing to move after the limit switch (4) fails.

2. The precise and repeatable positioning device for a movable wind tunnel test equipment according to claim 1, characterized in that: The equipment pre-positioning structure further comprises an axial reduction motor (9), a longitudinal track (10) and a longitudinal wheel (11), wherein the longitudinal track (10) is arranged in a direction parallel to the axis of the mobile test section (2), the longitudinal wheel (11) is rotatably mounted at the bottom of the mobile test section (2), the axial reduction motor (9) is mounted at the bottom of the mobile test section (2), the output end of the axial reduction motor (9) is connected to the longitudinal track (10), and drives the longitudinal wheel (11) to travel and transport on the longitudinal track (10), the transverse reduction motor (6) is fixedly mounted at the bottom of the longitudinal track (10), the transverse wheel (8) is rotatably mounted at the bottom of the longitudinal track (10), and the transverse track (7) is vertically arranged below the longitudinal track (10).

3. The precise and repeatable positioning device for a movable wind tunnel test equipment according to claim 2, characterized in that: The positioning structure at the inlet end of the equipment comprises two limit blocks (12), screws and pins (13); a limit block (12) is fixedly installed on the left and right sides of the outlet end of the front test section (1) respectively by means of screws and pins (13); a continuous front alignment plane (121) and a front adjustment inclined plane (122) are machined on the end face of one side of the limit block (12) close to the inlet end of the moving test section (2); a continuous rear adjustment inclined plane (21) and a rear alignment plane (22) are machined on the end face of one side of the inlet end of the moving test section (2) close to the limit block (12); the front adjustment inclined plane (122) and the rear adjustment inclined plane (21) are parallel, and the front alignment plane (121) and the rear alignment plane (22) are slidably fitted.

4. The precise and repeatable positioning device for a movable wind tunnel test equipment according to claim 3, characterized in that: The equipment outlet end positioning structure comprises a support (14), a rectangular hole (15), a double-bevel pin (16), an elevator (17), a reduction motor (18), an elevator fixing seat (19) and a load-bearing frame (20), wherein a support (14) is symmetrically arranged on the left and right sides below the outlet end of the mobile test section (2), a rectangular hole (15) is processed on the support (14), and a double-bevel pin (16) is arranged directly below the rectangular hole (15), and one bevel of the double-bevel pin (16) is located near the mobile test section. On one side of the axis of the test section (2), the other inclined surface of the double-bevel pin (16) faces the entrance end of the mobile test section (2). Corresponding to the two inclined surfaces of the double-bevel pin (16), the inner side surface of the bottom of the rectangular hole (15) is also processed into an inclined surface aligned and parallel to the two inclined surfaces of the double-bevel pin (16). A lifter (17) is fixedly installed at the bottom of the double-bevel pin (16). The lifter (17) is connected to a reduction motor (18). The reduction motor (18) drives the double-bevel pin (16) to do a lifting motion through the lifter (17).

5. The precise and repeatable positioning device for movable wind tunnel test equipment according to claim 4, characterized in that: The middle part of the double-bevel pin (16) is a square column, the lower part of the double-bevel pin (16) is a cylinder, the cross-section end of the cylinder is processed into a single ear piece, the single ear piece is opened, and the pin is passed through the hole for connecting the elevator (17), the upper part of the elevator fixing seat (19) is processed with a cylindrical hole, the double-bevel pin (16) is located in the cylindrical hole, the cylindrical side of the double-bevel pin (16) and the cylindrical hole are clearance-matched, the elevator fixing seat (19) is fixedly installed on the load-bearing frame (20), and the load-bearing frame (20) is fixed on the ground foundation.

6. A method for accurately and repeatedly debugging a movable wind tunnel test equipment, which is realized by relying on the accurate and repeated positioning device for movable wind tunnel test equipment according to claim 5, characterized in that: The following steps are involved: Step 1: The front test section (1) is fixedly arranged as a positioning basis, and a mobile device is provided at the bottom of the rear test section (3), and the mobile device drives the rear test section (3) to move in a direction parallel to the axis of the front test section (1); Step 2, control the transverse reduction motor (6) to make the mobile test section (2) enter the test station along the transverse track (7) and approach the limit switch (4). The limit switch (4) senses and sends a signal. After receiving the signal, the transverse reduction motor (6) stops rotating, and the transverse wheel (8) smoothly transitions to the stopper (5). The vertical surface of the stopper (5) completely blocks the transverse wheel (8), so that the mobile test section (2) stops moving, and the preliminary positioning of the mobile test section (2) is completed. Step 3, controlling the axial reduction motor (9) to move the movable test section (2) along the longitudinal track (10) toward the front test section (1) until the end faces of the two sections are in contact with each other. In the process of the movable test section (2) approaching the front test section (1), the front adjustment slope (122) of the limit block (12) gradually guides the entrance end of the movable test section (2) to a predetermined position, thereby achieving secondary positioning; Step 4, when the reduction motor (18) drives the double-bevel pin (16) to rise through the elevator (17), the two bevels of the double-bevel pin (16) act simultaneously to apply a force to the equipment forward and to the middle. The forward force makes the mobile test section (2) fit tightly with the front test section (1). The two double-bevel pins (16) simultaneously apply a force to the middle to fix the outlet of the mobile test section (2). The bevels of the double-bevel pin (16) transition to the inner wall of the double-bevel pin (16) and the rectangular hole (15). The double-bevel pin (16) can laterally position the outlet of the mobile test section (2). At the same time, the forward force cooperates with the front test section (1) in front to realize the function of fixing the axial position of the mobile test section (2) and withstand its aerodynamic load to achieve final positioning.

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