Device and method for adjusting position of object in test section of circulating water tunnel

Abstract

The invention discloses a circulating water tunnel test section object position adjusting device and method, and belongs to a fluid mechanics experiment technology. Comprising a rotating shaft penetrating through the wall surface of a circulating water tunnel test section, a turntable for mounting an object model is fixed at one end, extending into the circulating water tunnel test section, of the rotating shaft, and the part, located outside the circulating water tunnel test section, of the turntable is coupled with a circumferential corner adjusting mechanism and an axial position adjusting mechanism; the circumferential rotating angle of the rotating shaft is controlled through the circumferential rotating angle adjusting mechanism, the axial position height of the rotating shaft is controlled through the axial position adjusting mechanism, and then three-dimensional position adjustment of an object model on the rotating disc is completed. And the rotating shaft is connected with the mounting hole in the wall surface of the test section of the circulating water tunnel in a dynamic sealing manner. The three-dimensional position and speed parameters of the internal object model are adjusted in real time in the running state of the circulating water tunnel, water flow stopping or cover plate opening is not needed, and the limitation problem that an experiment needs to be interrupted in a traditional method is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrodynamic experiments, and particularly relates to a device and method for adjusting the position of an object in a circulating water tunnel test section. Background Technique

[0002] A circulating water tunnel experimental device usually consists of a closed water circulation system. With the drive of a pump, water flows along a pipeline in a cycle, and a stable and adjustable uniform flow field is formed in the working section of the water tunnel. This device can simulate and study the flow characteristics of fluids under different conditions, and is widely used in the design and performance testing of underwater moving bodies such as ships and submarines, having important engineering significance. However, since the experimental section of the circulating water tunnel is a closed system, it is difficult to adjust the position and attitude of the experimental model in the water tunnel.

[0003] The current operation process is to close the water tunnel. After the water flow stops, open the water tunnel cover plate, manually adjust the model position and other parameters, and then restart the water tunnel for the next round of experiments. Although this method can achieve the adjustment of the model position and state parameters, its operation is cumbersome, time-consuming and inefficient. Therefore, there is an urgent need to develop an experimental device that can adjust the position and state parameters of the object inside the water tunnel from the outside without disturbing the operation of the water tunnel, so as to improve the experimental efficiency and operation convenience. Summary of the Invention

[0004] Technical problems to be solved:

[0005] In order to avoid the deficiencies of the prior art, the present invention provides a device and method for adjusting the position of an object in a circulating water tunnel test section. Through the principles of screw drive and worm and worm gear drive, the real-time adjustment of the three-dimensional position and speed parameters of the internal object model is realized under the operating state of the circulating water tunnel, without stopping the water flow or opening the cover plate, solving the limitation problem that the traditional method must interrupt the experiment.

[0006] The technical solution of the present invention is: A device for adjusting the position of an object in a circulating water tunnel test section includes a rotating shaft penetrating the wall surface of the circulating water tunnel test section. One end of the rotating shaft extending into the circulating water tunnel test section is fixed with a turntable for installing an object model, and the part of it located outside the circulating water tunnel test section is coupled and connected with a circumferential rotation angle adjustment mechanism and an axial position adjustment mechanism; the circumferential rotation angle of the rotating shaft is controlled by the circumferential rotation angle adjustment mechanism, and the axial position height of the rotating shaft is controlled by the axial position adjustment mechanism, thereby completing the three-dimensional position adjustment of the object model on the turntable;

[0007] A dynamic seal connection method is adopted between the rotating shaft and the installation hole on the wall surface of the circulating water tunnel test section.

[0008] A further technical solution of the present invention is that the rotating shaft is a sleeve structure that is hollow and open at one end. A turntable is coaxially installed on the end face of its closed end, and its open end faces the outside of the circulating water tunnel test section. Two axial through grooves are symmetrically formed on the circumferential surface of the rotating shaft located outside the circulating water tunnel test section.

[0009] A further technical solution of the present invention is that the circumferential rotation angle adjustment mechanism includes an electric rotating table with a shaft hole, and the rotating shaft installed in its shaft hole is controlled by the electric rotating table to rotate. The electric rotating table includes a driving motor, a worm gear, and a worm. The worm is controlled by the driving motor to drive the worm gear to rotate;

[0010] Or the electric rotating table includes a driving motor and a transmission gear set. The driving motor controls the driving gear in the transmission gear set to drive the driven gear to rotate;

[0011] The turbine or the driven gear serves as a rotation execution member, and its central hole is the shaft hole for passing through the rotating shaft.

[0012] A further technical solution of the present invention is that the rotating shaft is connected to the electric rotating table through a U-shaped pressing plate. The bottom cross beam of the pressing plate penetrates through the two axial through grooves of the rotating shaft, can slide along the length direction of the axial through grooves, and has a threaded hole at the center of the cross beam. The two supporting arms of the pressing plate are located outside the rotating shaft and are parallel to the axial direction of the rotating shaft in the length direction. Their tops are fixed to the bottom surface of the rotation execution member of the electric rotating table. The rotation execution member drives the pressing plate to rotate, and then drives the rotating shaft, the turntable, and the object model to rotate.

[0013] A further technical solution of the present invention is that the axial position adjustment mechanism adopts the principle of screw drive, and the pressing plate is used as the nut part in the screw drive.

[0014] A further technical solution of the present invention is that the axial position adjustment mechanism includes a screw rod. The top of the screw rod extends into the rotating shaft from the open end of the rotating shaft and is installed in cooperation with the threaded hole on the cross beam of the pressing plate. Its bottom is located outside the rotating shaft and is rotatably connected to the rotating shaft;

[0015] When the bottom of the screw rod is controlled to rotate, with the pressing plate fixed, the screw rod converts the rotational motion into its own axial linear motion, and at the same time drives the rotating shaft to move upward or downward along the axis, thereby driving the turntable and the object model to change the axial position.

[0016] A further technical solution of the present invention is that the upper part of the screw rod is a screw structure, and the bottom is a cylindrical structure with a hand crank. The connecting part between the screw and the cylinder is an I-shaped rotating body structure;

[0017] Two light holes are symmetrically formed on the outer peripheral surface of the open end of the rotating shaft. Two set screws are respectively inserted into the annular grooves of the I-shaped rotating body from the two light holes to realize the rotational connection between the rotating shaft and the screw.

[0018] A further technical solution of the present invention is that a sealing round cover is installed at the top end of the housing of the electric rotating table. The central hole of the sealing round cover is coaxial with the shaft hole of the rotating actuator, and an O-ring is sleeved between the central hole of the sealing round cover and the rotating shaft to achieve dynamic sealing between the two.

[0019] A further technical solution of the present invention is that the front panel of the circulating water tunnel test section is provided with an observation window, and through holes are opened on its bottom cover for coaxially installing the sealing round cover, and an O-ring is arranged between the through holes and the sealing round cover to achieve dynamic sealing between the two.

[0020] A method for adjusting the three-dimensional position of an object model by an object position adjusting device in a circulating water tunnel test section is as follows:

[0021] Drive the rotating shaft to rotate through the circumferential rotation angle adjusting mechanism to adjust the horizontal position of the turntable and the object model;

[0022] Drive the rotating shaft to move along its axis through the axial position adjusting mechanism to adjust the vertical height of the turntable and the object model;

[0023] Combining the actions of the circumferential rotation angle adjusting mechanism and the axial position adjusting mechanism, synchronously or step by step control the circumferential rotation angle and the axial position of the rotating shaft through the controller to realize the dynamic adjustment of the three-dimensional coordinate parameters of the object model on the turntable.

[0024] Beneficial effects

[0025] The beneficial effects of the present invention are as follows: Through the three core functions of power transmission, multi-dimensional regulation and sealing stability of the rotating shaft of the present invention, the lossless linkage between external operations and the internal model state is realized, which is the key technical support for breaking the inefficient mode of "start-stop - open the cover - manual adjustment" in traditional water tunnel experiments. The specific advantage analysis is as follows:

[0026] 1. Through the synergistic effect of the circumferential rotation angle adjusting mechanism (worm and gear or gear drive) and the axial position adjusting mechanism (lead screw drive) of the present invention, the three-dimensional position and motion parameters of the model can be adjusted in real time under the operating state of the water tunnel without interrupting the water flow or manually opening the cover, greatly shortening the experimental period, reducing the downtime, and improving the continuity of data acquisition.

[0027] 2. The present invention simplifies the operation process through external electric or manual adjustment methods (such as electric rotating table, hand rocker), avoids the risk of experimental personnel frequently contacting the closed water tunnel environment, and at the same time reduces the complexity and physical consumption of manual operation.

[0028] 3. The present invention adopts a high-precision mechanical transmission structure (such as lead screws, worm gears) and controller programming control to achieve precise adjustment of angles, heights, and speeds, ensuring the consistency and repeatability of experimental parameters and providing a reliable data basis for flow field research.

[0029] 4. Between the rotating shaft of the present invention and the wall surface of the circulating water tunnel test section, a dynamic seal design (such as O-rings, sealing round covers) is adopted to achieve complete closure, effectively preventing water leakage, ensuring the long-term stable operation of the device in a high-speed water flow environment, and avoiding experimental interruption caused by seal failure.

[0030] 5. The rotating shaft of the present invention adopts a hollow sleeve structure, combined with designs such as U-shaped pressing plates and axial through grooves, to achieve mechanical decoupling of horizontal rotation and vertical lifting. The structure is compact and easy to install and maintain; it can be adapted to a variety of underwater vehicle models to meet the different hydrodynamic experimental requirements of ships, submarines, etc.

[0031] 6. It supports synchronous or step-by-step adjustment of the circumferential rotation angle (horizontal position) and axial position (vertical height), and can dynamically simulate complex motion trajectories (such as spiral motion), providing flexible experimental conditions for multi-dimensional flow field analysis. Brief Description of the Drawings

[0032] Figure 1 It is a schematic structural position diagram of the adjustment device for the circulating water tunnel test section in the embodiment of the present invention;

[0033] Figure 2 It is an isometric view of an object position adjustment device for a circulating water tunnel test section in the embodiment of the present invention;

[0034] Figure 3 It is a front view of an object position adjustment device for a circulating water tunnel test section in the embodiment of the present invention;

[0035] Figure 4 It is an isometric view of the coupled installation of the rotating shaft, screw, and pressing plate in the embodiment of the present invention;

[0036] Figure 5 It is an isometric view of the coupled installation of the screw and the pressing plate in the embodiment of the present invention;

[0037] Explanation of Reference Numerals: 1 - Circulating water tunnel test section, 2 - Front panel, 3 - Bottom cover, 4 - Object model, 5 - Support rod, 6 - φ5mm hole, 7 - Turntable, 8 - M4 cross recessed countersunk self-tapping screw, 9 - M6 hexagon socket head cap screw, 10 - O-ring, 11 - Sealing sleeve, 12 - Sealing round cover, 13 - High-precision electric rotating table, 14 - Pressing plate, 15 - Electric cable, 16 - Controller, 17 - Rotating shaft, 18 - Screw, 19 - Hand crank, 20 - Slotted end set screw. Detailed Description of the Invention

[0038] The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0039] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0040] Based on the problems such as the cumbersome, time-consuming and low-efficiency operation process of adjusting the position and attitude of the experimental model in the water tunnel at present, the present invention provides a device for adjusting the position of an object in a circulating water tunnel test section, including a rotating shaft penetrating the wall surface of the circulating water tunnel test section. One end of the rotating shaft extending into the circulating water tunnel test section is fixed with a turntable for installing an object model, and the part of it located outside the circulating water tunnel test section is coupled and connected with a circumferential rotation angle adjusting mechanism and an axial position adjusting mechanism; the circumferential rotation angle of the rotating shaft is controlled by the circumferential rotation angle adjusting mechanism, and the axial position height of the rotating shaft is controlled by the axial position adjusting mechanism, so as to complete the three-dimensional position adjustment of the object model on the turntable; a dynamic sealing connection method is adopted between the rotating shaft and the mounting hole on the wall surface of the circulating water tunnel test section.

[0041] Specifically, the rotating shaft is a hollow sleeve structure with one end open. The turntable is coaxially installed on the end face of its closed end, and its open end faces the outside of the circulating water tunnel test section; two axial through grooves are symmetrically arranged on the circumferential surface of the rotating shaft located outside the circulating water tunnel test section.

[0042] Specifically, the circumferential rotation angle adjusting mechanism includes an electric rotating table with a shaft hole, and the rotating shaft installed in its shaft hole is rotated by the electric rotating table; the electric rotating table includes a driving motor, a worm and a worm gear, and the worm is controlled by the driving motor to drive the worm gear to rotate; or the electric rotating table includes a driving motor and a transmission gear set, and the driving motor controls the driving gear in the transmission gear set to drive the driven gear to rotate; the turbine or the driven gear is used as a rotation execution part, and its central hole is the shaft hole for passing through the rotating shaft.

[0043] Specifically, the rotating shaft is connected to the electric rotating table through a U-shaped pressing plate; the bottom cross beam of the pressing plate penetrates through two axial through grooves of the rotating shaft, can slide along the length direction of the axial through grooves, and has a threaded hole at the center of the cross beam; the two supporting arms of the pressing plate are located outside the rotating shaft and the length direction is parallel to the axial direction of the rotating shaft, and the top ends thereof are fixed to the bottom surface of the rotation actuator of the electric rotating table, and the rotation actuator drives the pressing plate to rotate, and then drives the rotating shaft, the turntable, and the object model to rotate.

[0044] Specifically, the axial position adjusting mechanism adopts the principle of screw drive, and the pressing plate is used as the nut part in the screw drive.

[0045] Specifically, the axial position adjusting mechanism includes a screw rod, the top end of the screw rod extends into the rotating shaft from the open end of the rotating shaft, and is fitted and installed with the threaded hole on the cross beam of the pressing plate, and the bottom thereof is located outside the rotating shaft and is rotationally connected to the rotating shaft; when controlling the rotation of the bottom of the screw rod, with the pressing plate fixed, the screw rod converts the rotational motion into its own axial linear motion, and at the same time drives the rotating shaft to move upward or downward along the axis, and then drives the turntable and the object model to change the axial position.

[0046] Specifically, the upper part of the screw rod is a screw structure, the bottom is a cylindrical structure with a hand rocker, and the connecting part between the screw and the cylinder is an I-shaped rotating body structure; two light holes are symmetrically opened on the outer peripheral surface of the open end of the rotating shaft, and two set screws are respectively inserted into the annular grooves of the I-shaped rotating body from the two light holes to realize the rotational connection between the rotating shaft and the screw.

[0047] Specifically, a sealing round cover is installed at the top end of the housing of the electric rotating table, the central hole of the sealing round cover is coaxial with the shaft hole of the rotation actuator, and an O-ring is sleeved between the central hole of the sealing round cover and the rotating shaft to realize dynamic sealing between the two.

[0048] Specifically, the front panel of the circulating water tunnel test section is provided with an observation window, and a through hole is opened on the bottom cover for coaxially installing the sealing round cover, and an O-ring is arranged between the through hole and the sealing round cover to realize dynamic sealing between the two.

[0049] The present invention provides a method for adjusting the three-dimensional position of an object model by a device for adjusting the position of an object in a circulating water tunnel test section, and the specific steps are as follows:

[0050] Step 1: Drive the rotating shaft to rotate through the circumferential rotation angle adjusting mechanism to adjust the horizontal position of the turntable and the object model;

[0051] Step 2: Drive the rotating shaft to move along its axis through the axial position adjusting mechanism to adjust the vertical height of the turntable and the object model;

[0052] Step 3: Combine the actions of the circumferential rotation angle adjustment mechanism and the axial position adjustment mechanism, and synchronously or step by step control the circumferential rotation angle and axial position of the adjustment rotating shaft through the controller to achieve dynamic adjustment of the three-dimensional coordinate parameters of the object model on the turntable.

[0053] The above technical solution will be further described below in conjunction with the drawings and examples:

[0054] In one embodiment, referring to Figure 1 and Figure 2 As shown, in this embodiment, an object position adjustment device for a circulating water tunnel test section is installed in the circulating water tunnel test section. The front panel 2 of the circulating water tunnel test section 1 is provided with an observation window, and the bottom cover 3 is provided with a through hole for installing a sealing round cover 12; the rotating shaft 17 is a hollow sleeve structure, one end is closed and coaxially installs a turntable 7 (the turntable 7 fixes the object model 4 through a support rod 5), and the other end is open and extends through the through hole of the bottom cover 3 to the lower part of the circulating water tunnel test section 1; the controller 16 controls the high-precision electric rotary table 13 to complete the adjustment of the circumferential rotation angle of the rotating shaft 17, and the rotating actuator (worm wheel or driven gear) of the high-precision electric rotary table 13 is connected to the rotating shaft 17 through a U-shaped pressing plate 14; the controller 16 and the high-precision electric rotary table 13 are connected through a wire cable; the top end of the screw 18 is matched with the threaded hole of the pressing plate 14, and the bottom is rotationally connected to the rotating shaft 17 through a slotted flat end set screw 20; an O-ring 10 is provided between the sealing round cover 12 and the rotating shaft 17 and between the bottom cover 3 and the sealing round cover 12 to ensure dynamic sealing.

[0055] In one embodiment, referring to Figure 2 and Figure 3 As shown, four φ5mm small holes 6 are radially opened on the surface of the turntable 7, which can adjust the distance of the object model 4 from the rotation center or can install multiple object models 5 at the same time. Both ends of the support rod 5 are provided with threads, and one end with the thread is fixed to the turntable 7, and the other end is connected to the object model 4. This design ensures that under the action of water flow, the object model 4 will not float with the water flow, and when the turntable 7 rotates, the object model 4 can rotate accordingly, so as to achieve adjustment of different positions. The turntable 7 and the rotating shaft 17 are fixed by four M4 cross recessed countersunk self-tapping screws 8 to ensure that the rotating shaft 17 can drive the turntable 7 to rotate. The other end of the rotating shaft 17 extends to the outside through the hole of the water tunnel bottom cover 3, and the external part fixes the sealing round cover 12 in the circular hole on the surface of the bottom cover through six M6 hexagon socket head cap screws 9, thus completely closing the water tunnel test section. To prevent water from penetrating to the outside, O-rings 10 are provided between the sealing round cover 12 and the bottom cover 3 and between the sealing round cover 12 and the rotating shaft 17.

[0056] Specifically, four holes with a diameter of 5 mm are provided at the bottom of the rotating actuator of the high-precision electric rotary table 13. The pressure plate 14 is fastened to the rotating actuator of the electric rotary table 13 by four M6 socket head cap screws 9. The rotating shaft 17 is connected to the rotating actuator of the electric rotary table 13 through the pressure plate 14 and passes through the shaft hole of the rotating actuator. The high-precision electric rotary table 13 is connected to the controller 16 through the cable 15. After connecting the power supply, the controller 16 can drive the electric rotary table 13 to rotate through a preset program. The rotation of the electric rotary table 13 drives the pressure plate 14 to rotate, which in turn drives the rotating shaft 17 to rotate. Finally, the rotating shaft 17 drives the turntable 7 to rotate, thereby realizing the rotational adjustment of the object model 4.

[0057] Preferably, a sealing sleeve 11 is sleeved on the connection part between the rotating shaft and the sealing cover 12, and dynamic sealing is achieved with the sealing cover 12 through the sealing sleeve 11 and the O-ring 10.

[0058] Preferably, a through hole is radially opened at the bottom of the screw rod 18, and the hand rocker 19 is inserted into the radial through hole for manually rotating the screw rod 18.

[0059] In one embodiment, referring to Figure 4 and Figure 5 As shown, an opening is provided at the bottom of the rotating shaft 17. The screw rod 18 can extend into the interior of the rotating shaft 17 from the opening and be screwed into the threaded hole of the pressure plate 14, and the screw rod 18 and the rotating shaft 17 are limited by two slotted flat end set screws 20 to achieve their rotational connection. A 6-mm radial through hole is provided at the lower end of the screw rod 18, and the hand rocker 19 can be inserted into the through hole. By rotating the hand rocker 19, the screw rod 18 is driven to rotate, which in turn drives the rotating shaft 17 to move up and down. During the movement, the rotating shaft 17 drives the turntable 7 to adjust the position, thereby realizing the precise adjustment of the model 4 inside the water tunnel in the vertical direction.

[0060] In actual operation, the corresponding program can be written through the electric turntable controller to precisely control the rotation angle and speed of the electric turntable. In addition, a handwheel is also equipped on the right side of the electric turntable. When the electric control is not performed using the controller, the operator can manually adjust the rotation angle of the turntable through the handwheel to obtain the hydrodynamic parameters of the object model inside the circulating water tunnel at different positions. After completing the adjustment of the horizontal position of the model, the operator can rotate the hand rocker to adjust the height of the model, and finally realize the precise adjustment of the three-dimensional coordinate position parameters of the model inside the circulating water tunnel.

[0061] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present invention without departing from the principles and purposes of the present invention.

Claims

1. A device for adjusting the position of an object in a circulating water tunnel test section, characterized in that: It includes a rotating shaft passing through the wall surface of the circulating water tunnel test section. One end of the rotating shaft extending into the circulating water tunnel test section is fixed with a turntable for installing an object model, and the part located outside the circulating water tunnel test section is coupled and connected with a circumferential rotation angle adjusting mechanism and an axial position adjusting mechanism. The circumferential rotation angle of the rotating shaft is controlled by the circumferential rotation angle adjusting mechanism, and the axial position height of the rotating shaft is controlled by the axial position adjusting mechanism, so as to complete the three-dimensional position adjustment of the object model on the turntable. A dynamic sealing connection method is adopted between the rotating shaft and the mounting hole on the wall surface of the circulating water tunnel test section.

2. The object position adjusting device for a circulating water tunnel test section according to claim 1, wherein: The rotating shaft is a hollow sleeve structure with one end open. The turntable is coaxially installed on the end face of its closed end, and its open end faces the outside of the circulating water tunnel test section. Two axial through grooves are symmetrically opened on the circumferential surface of the rotating shaft located outside the circulating water tunnel test section.

3. The object position adjusting device for a circulating water tunnel test section according to claim 2, wherein: The circumferential rotation angle adjusting mechanism includes an electric rotating table with a shaft hole, and the rotating shaft installed in its shaft hole is controlled by the electric rotating table to rotate. The electric rotating table includes a driving motor, a worm gear and a worm, and the worm is controlled by the driving motor to drive the worm gear to rotate. Or the electric rotating table includes a driving motor and a transmission gear set, and the driving motor controls the driving gear in the transmission gear set to drive the driven gear to rotate. The turbine or the driven gear serves as a rotation actuator, and its central hole is the shaft hole for passing through the rotating shaft.

4. The object position adjusting device for a circulating water tunnel test section according to claim 3, wherein: The rotating shaft is connected to the electric rotating table through a U-shaped pressing plate. The bottom cross beam of the pressing plate passes through the two axial through grooves of the rotating shaft, can slide along the length direction of the axial through grooves, and has a threaded hole at the center of the cross beam. The two support arms of the pressing plate are located outside the rotating shaft and the length direction is parallel to the axial direction of the rotating shaft. The top ends are fixed to the bottom surface of the rotation actuator of the electric rotating table, and the rotation actuator drives the pressing plate to rotate, thereby driving the rotating shaft, the turntable and the object model to rotate.

5. The object position adjusting device for a circulating water tunnel test section according to claim 4, characterized in that: The axial position adjusting mechanism adopts the principle of screw drive, and the pressing plate is used as the nut part in the screw drive.

6. The object position adjusting device for a circulating water tunnel test section according to claim 5, characterized in that: The axial position adjusting mechanism includes a screw rod. The top end of the screw rod extends into the rotating shaft from the open end of the rotating shaft and is installed in cooperation with the threaded hole on the cross beam of the pressing plate. The bottom of it is located outside the rotating shaft and is rotatably connected to the rotating shaft. When the bottom of the screw rod is controlled to rotate, with the pressing plate fixed, the screw rod converts the rotational motion into its own axial linear motion, and at the same time drives the rotating shaft to move upward or downward along the axis, thereby driving the turntable and the object model to change the axial position.

7. The object position adjusting device for a circulating water tunnel test section according to claim 6, characterized in that: The upper part of the screw rod is a screw structure, and the bottom is a column structure with a hand crank. The connecting part between the screw and the column is an I-shaped rotating body structure. Two light holes are symmetrically opened on the outer peripheral surface of the open end of the rotating shaft, and two set screws are respectively inserted into the annular grooves of the I-shaped rotating body from the two light holes to realize the rotational connection between the rotating shaft and the screw.

8. The object position adjusting device for a circulating water tunnel test section according to claim 7, characterized in that: A sealing round cover is installed at the top end of the housing of the electric rotating table. The central hole of the sealing round cover is coaxial with the shaft hole of the rotation actuator, and an O-ring is sleeved between the central hole of the sealing round cover and the rotating shaft to realize the dynamic sealing between the two.

9. The object position adjusting device for a circulating water tunnel test section according to claim 8, characterized in that: The front panel of the circulating water tunnel test section is provided with an observation window, and a through hole is opened on its bottom cover for coaxially installing the sealing round cover, and an O-ring is arranged between the through hole and the sealing round cover to realize the dynamic sealing between the two.

10. A method for adjusting the three-dimensional position of an object model by the object position adjusting device of the circulating water tunnel test section according to any one of claims 1-9, characterized in that The specific steps are as follows: Drive the rotating shaft to rotate through the circumferential rotation angle adjusting mechanism, and adjust the horizontal position of the turntable and the object model; Drive the rotating shaft to move along its axis through the axial position adjusting mechanism, and adjust the vertical height of the turntable and the object model; Combining the actions of the circumferential rotation angle adjusting mechanism and the axial position adjusting mechanism, synchronously or step by step control the circumferential rotation angle and the axial position of the rotating shaft through the controller, so as to realize the dynamic adjustment of the three-dimensional coordinate parameters of the object model on the turntable.

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