Multi-position interference effect system for wind tunnel pressure measurement and force measurement test

Abstract

The utility model discloses a multi-position interference effect system for wind tunnel pressure measurement and force measurement tests, which comprises a middle fixed platform, a turntable, a rotating mechanism, a rotating bearing platform, a horizontal moving mechanism, a roller shutter unit and a flat crawler belt, and is characterized in that the middle fixed platform is positioned in the middle of the turntable, the turntable can rotate relative to the middle fixed platform, and a radial mounting groove is formed in the turntable; the horizontal moving mechanism is installed in the installation groove, the rotating mechanism is arranged on the horizontal moving mechanism, the horizontal moving mechanism drives the rotating mechanism to move in the radial direction of the rotating disc, the rotating bearing platform is arranged on the rotating mechanism, the rotating mechanism drives the rotating bearing platform to rotate, the roller shutter unit is arranged on the upper portion of the installation groove, and the flat crawler belt is installed on the roller shutter unit. The flat crawler belt covers an upper groove opening of the mounting groove, a through hole is formed in the flat crawler belt, and the rotating bearing platform is just located in the through hole. According to the utility model, the distance, the azimuth angle and the wind deflection angle between the interference model and the test model can be adjusted more conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of wind tunnel tests for building structures, in particular to a multi-position interference effect system for wind tunnel pressure measurement and force measurement tests. Background Art

[0002] The development of modern cities has produced dense building clusters. During the flow of natural wind, it will be interfered by adjacent buildings. The magnitude and shape of the wind load on the affected high-rise buildings will change significantly compared with their isolated state. Experimental studies have shown that the overall static and dynamic interference effects between two high-rise buildings are closely related to their positions and azimuth angles.

[0003] Specifically manifested as: when the disturbing building is upstream, it will produce a "shielding effect" on the downstream building. The closer the two buildings are, the more serious the shielding effect is, and the influence of the building net distance on each surface is different; when the disturbing building is downstream, the influence on the upstream building is very small; when two high-rise buildings are juxtaposed, there is a weak "slit effect", the wind speed between the two buildings increases, a large negative pressure is generated inside, the local wind pressure coefficient increases, and the smaller the distance, the more the wind pressure coefficient increases.

[0004] In the laboratory, an experimental device is used to test the interference effect between buildings. Currently, the experimental devices in most laboratories fix the test model and the interference model on a turntable, and they have the following deficiencies:

[0005] 1. It is difficult to adjust the wind deflection angle of the interference model with respect to the test model in the pressure measurement interference test;

[0006] 2. In the test, if it is necessary to change the relative position between the interference model and the test model, the model needs to be disassembled from the turntable, then repositioned and drilled, and the model needs to be fixed again. The operation process is relatively cumbersome;

[0007] 3. For each change in position, the test model and the interference model need to be manually positioned and fixed by the staff. There is usually a certain error during installation, which affects the test results. Summary of the Utility Model

[0008] The purpose of the utility model is to provide a multi-position interference effect system for wind tunnel pressure measurement and force measurement tests, which realizes more convenient adjustment of the distance, azimuth angle and wind deflection angle between the interference model and the test model.

[0009] The purpose of the utility model is achieved by the following technical solutions:

[0010] A multi-position interference effect system for wind tunnel pressure measurement and force measurement tests, characterized in that it includes an intermediate fixed platform, a turntable, a rotating mechanism, a rotating bearing platform, a horizontal moving mechanism, a rolling curtain unit and a flat track. The intermediate fixed platform is located in the middle of the turntable, and the turntable can rotate relative to the intermediate fixed platform. The turntable is provided with a radial installation groove, and the horizontal moving mechanism is installed in the installation groove. The rotating mechanism is arranged on the horizontal moving mechanism and is driven by the horizontal moving mechanism to move along the radial direction of the turntable. The rotating bearing platform is arranged on the rotating mechanism and is driven by the rotating mechanism to rotate. The rolling curtain unit is arranged above the installation groove, and the flat track is installed on the rolling curtain unit. The flat track covers the upper notch of the installation groove, and the flat track is provided with a perforation, and the rotating bearing platform is exactly located in the perforation.

[0011] Further, the horizontal moving mechanism includes a first motor, a screw rod and a moving block. The first motor and the screw rod are both installed in the installation groove. The output shaft of the first motor is connected to the screw rod, and the screw rod is driven to rotate by the first motor. The moving block is provided with a threaded hole and is connected to the screw rod through the threaded hole in a mating manner. The rotating mechanism is arranged on the moving block.

[0012] Further, a strip-shaped mounting seat is provided at the bottom of the installation groove. The screw rod is rotatably arranged above the strip-shaped mounting seat, and the first motor is arranged at one end of the strip-shaped mounting seat. The strip-shaped mounting seat is slidably connected to the bottom of the moving block.

[0013] Further, a chute is provided on the upper surface of the strip-shaped mounting seat, and a slider is provided at the bottom of the moving block. The slider is slidably connected to the chute in a mating manner.

[0014] Further, the rotating mechanism includes a second motor. The second motor is mounted upward on the horizontal moving mechanism, and the rotating bearing platform is mounted on the output shaft of the second motor.

[0015] Further, a fixing hole for fixing the interference model is provided in the middle of the rotating bearing platform.

[0016] Further, the upper surface of the flat track is flush with the upper surface of the turntable.

[0017] Further, the rolling curtain unit includes a main rolling curtain machine and a driven rolling curtain machine. The main rolling curtain machine and the driven rolling curtain machine are respectively arranged at both ends of the upper part of the installation groove. Both ends of the flat track are respectively connected to the reels of the main rolling curtain machine and the driven rolling curtain machine. The reel of the main rolling curtain machine is driven to rotate by a third motor, and the reel of the driven rolling curtain machine is provided with a restoring force by a spring.

[0018] Compared with the prior art, the utility model has the following beneficial effects:

[0019] 1. The utility model is provided with a rotating bearing platform inside the turntable. During the test, the interference model will be fixed on the rotating bearing platform. During the test process, the interference model can be driven to rotate by the rotating mechanism, so that the wind deflection angle of the interference model relative to the test model can be conveniently changed. By means of the horizontal movement mechanism, the distance between the interference model and the test model can be conveniently adjusted. It can be seen that the utility model is simple to operate, has a wide selection range, and can more conveniently adjust the distance, azimuth angle and wind deflection angle between the interference model and the test model, solves the problem that it is difficult to adjust the wind deflection angle of the interference model in the existing interference effect experiment, shortens the preparation time in the early stage of the experiment, and greatly improves the test efficiency.

[0020] 2. The utility model fixes the interference model on the rotating bearing platform for testing, replacing the traditional installation method, and avoiding the problem of punching and positioning at multiple places or multiple times on the turntable when adjusting the position of the model.

[0021] 3. The adjustment of the interference model in the utility model is realized through the rotating mechanism and the horizontal movement mechanism. During the test process, it is no longer fixed manually, which can avoid human errors, the adjustment is more accurate, and the test results are better guaranteed.

[0022] 4. The utility model covers the upper slot opening of the installation groove with a flat track, so that the surface of the turntable can be better kept flat. Description of the Drawings

[0023] Figure 1 is a three-dimensional schematic diagram of the multi-position interference effect system of the embodiment of the utility model;

[0024] Figure 2 is a perspective schematic diagram of the multi-position interference effect system of the embodiment of the utility model;

[0025] Figure 3 is a structural schematic diagram when the horizontal movement mechanism, rotating mechanism, rotating bearing platform, rolling curtain unit and flat track of the embodiment of the utility model are assembled together;

[0026] Figure 4 is a structural schematic diagram of the moving block slidingly connected with the sliding groove of the embodiment of the utility model.

[0027] Meanings of the reference numerals in the drawings:

[0028] 1 - turntable; 2 - intermediate fixed platform; 3 - test model; 4 - installation groove; 5 - flat track; 6 - interference model; 7 - strip-shaped mounting seat; 8 - active rolling curtain machine; 9 - driven rolling curtain machine; 10 - reel; 11 - first motor; 12 - screw; 13 - sliding groove; 14 - second motor; 15 - moving block; 16 - fixing hole; 17 - rotating bearing platform; 18 - perforation; 19 - slider. Detailed Embodiments

[0029] The present utility model will be further described below in conjunction with embodiments.

[0030] In the description of the present utility model, it should be understood that with regard to the orientation description, such as the upper, lower, front, rear, left, right, etc., the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model 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. Therefore, it should not be construed as a limitation to the present utility model.

[0031] In the description of the present utility model, the meaning of "several" is one or more, the meaning of "multiple" is two or more. Understandings such as "greater than", "less than", "exceeding", etc. do not include the present number, and understandings such as "above", "below", "within", etc. include the present number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0032] In the description of the present utility model, unless otherwise clearly defined, words such as "set", "installed", "connected", etc. should be understood in a broad sense. Those skilled in the technical field can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.

[0033] Embodiment:

[0034] As Figures 1 to 4 shown is the multi-position interference effect system for wind tunnel pressure measurement and force measurement tests in this embodiment, which includes an intermediate fixed platform 2, a circular turntable 1, a rotating mechanism, a circular rotating bearing platform 17, a horizontal moving mechanism, a rolling curtain unit, and a flat crawler 5.

[0035] The intermediate fixed platform 2 is cylindrical in shape, located in the middle of the turntable 1, and is rotationally connected to the turntable 1 through a conventional structure. The turntable 1 can rotate relative to the intermediate fixed platform 2. The upper surface of the intermediate fixed platform 2 is flush with the upper surface of the turntable 1, and the intermediate fixed platform 2 is used to fix the test model 3.

[0036] The turntable 1 is provided with an installation groove 4, and the installation groove 4 extends along the radial direction of the turntable 1. The horizontal moving mechanism is installed in the installation groove 4. The structure of the horizontal moving mechanism in this embodiment is: As Figure 3As shown in the figure, it includes a first motor 11, a screw rod 12, and a moving block 15. At the bottom of the installation groove 4, there is a strip-shaped mounting base 7. The screw rod 12 is rotatably arranged above the strip-shaped mounting base 7. The first motor 11 is arranged at one end of the strip-shaped mounting base 7. The output shaft of the first motor 11 is connected to the screw rod 12. The screw rod 12 is driven to rotate by the first motor 11. The moving block 15 is provided with a threaded hole and is connected to the screw rod 12 through the threaded hole. On the upper surface of the strip-shaped mounting base 7, there is a chute 13, and the chute 13 is parallel to the screw rod 12. As Figure 4 shown, a slider 19 is provided at the bottom of the moving block 15. The slider 19 is slidably connected to the chute 13, making the sliding of the moving block 15 smoother. The threaded fit between the screw rod 12 and the moving block 15 can make the movement of the interference model 6 more accurate and ensure the accurate adjustment of the distance between the interference model 6 and the test model 3.

[0037] Among them, the rotating mechanism includes a second motor 14. The second motor 14 is mounted upward on the moving block of the horizontal moving mechanism. The rotating base 17 is mounted on the output shaft of the second motor 14. The second motor 14 drives the rotating base 17 to rotate. During the adjustment process, by driving the screw rod 12 to rotate through the first motor 11, the moving block 15 can be smoothly driven to move and adjust, and then the second motor 14 and the rotating base 17 are driven to move and adjust together. The material of the rotating base 17 in this embodiment is aluminum alloy. The second motor 14 is a stepping motor, which can more accurately control the rotation angle, so as to accurately control the wind deflection angle during the test and ensure the accuracy of the test.

[0038] The rolling curtain unit is arranged at the upper part of the installation groove 4. The rolling curtain unit in this embodiment includes a main rolling curtain machine 8 and a driven rolling curtain machine 9. The main rolling curtain machine 8 and the driven rolling curtain machine 9 are respectively arranged at both ends of the upper part of the installation groove 4. Both ends of the flat track 5 are respectively connected to the reels 10 of the main rolling curtain machine 8 and the driven rolling curtain machine 9. The flat track 5 in this embodiment is a rubber flat track, which covers the upper notch of the installation groove 4 and is flush with the upper surface of the turntable 1, so as to better ensure the flatness of the surface of the turntable 1. A circular through hole 18 is provided on the flat track 5. The shape and size of the through hole 18 are adapted to the rotating base 17. The rotating base 17 is exactly located in the through hole 18, and the upper surface of the rotating base 17 is basically flush with the upper surface of the flat track 5.

[0039] Both the active rolling machine 8 and the driven rolling machine 9 are conventional rolling devices. The active rolling machine 8 is provided with a third motor. The reel 10 of the active rolling machine 8 is driven to rotate by the third motor (the third motor is not shown in the figure). The driven rolling machine 9 is provided with a spring (the spring is not shown in the figure). The reel 10 of the driven rolling machine 9 is provided with a restoring force by the spring. Through the spring, the reel 10 of the driven rolling machine 9 always maintains the tendency of rolling up the flat crawler belt, that is, the driven rolling machine 9 always pulls the flat crawler belt 5 under the action of the spring, so that the surface of the flat crawler belt 5 remains flat. When the active rolling machine 8 rotates to roll up the flat crawler belt 5, the driven rolling machine 9 will be forced to rotate under the action of the pulling force and release the flat crawler belt 5 thereon. When the active rolling machine 8 rotates to release the flat crawler belt 5, the driven rolling machine 9 will rotate to roll up the flat crawler belt 5 under the action of the spring. During use, when the horizontal moving mechanism drives the rotating bearing platform 17 to move and adjust, the active rolling machine 8 will also be started, so that the rotating bearing platform 17 is always located in the through hole 18.

[0040] In this embodiment, a fixing hole 16 is provided in the middle of the rotating bearing platform 17, and the interference model 6 will be fixed on the rotating bearing platform 17 through the fixing hole 16.

[0041] The use process of the multi-bit interference effect system of this embodiment is as follows:

[0042] During the test, the interference model 6 is fixed on the rotating bearing platform 17 through the fixing hole 16, and the test model 3 is fixed on the middle fixing platform 2. According to the test requirements, the azimuth angle is adjusted by rotating the turntable 1, the wind deflection angle is adjusted by driving the rotating bearing platform 16 to rotate through the rotating mechanism, and the distance between the interference model 6 and the test model 3 is adjusted by driving the interference model 6 to move through the horizontal moving mechanism. When the horizontal moving mechanism drives the interference model 6 to move, the rolling machine group is also started synchronously, so that the rotating bearing platform 17 is always located in the through hole 18. After the adjustment is completed, the test can be carried out.

[0043] The above embodiments of the present utility model do not limit the protection scope of the present utility model. The implementation manners of the present utility model are not limited thereto. All these, according to the above content of the present utility model, in accordance with the common technical knowledge and conventional means in the art, without departing from the above basic technical idea of the present utility model, various other forms of modification, replacement or change made to the above structure of the present utility model shall fall within the protection scope of the present utility model.

Claims

1. A multi-position interference effect system for wind tunnel pressure measurement and force measurement tests, characterized in that: It includes an intermediate fixed platform, a turntable, a rotating mechanism, a rotating bearing platform, a horizontal moving mechanism, a rolling curtain unit and a flat track. The intermediate fixed platform is located in the middle of the turntable. The turntable can rotate relative to the intermediate fixed platform. The turntable is provided with a radial installation groove. The horizontal moving mechanism is installed in the installation groove. The rotating mechanism is arranged on the horizontal moving mechanism. The horizontal moving mechanism drives the rotating mechanism to move along the radial direction of the turntable. The rotating bearing platform is arranged on the rotating mechanism. The rotating mechanism drives the rotating bearing platform to rotate. The rolling curtain unit is arranged above the installation groove. The flat track is installed on the rolling curtain unit. The flat track covers the upper notch of the installation groove. The flat track is provided with perforations. The rotating bearing platform is exactly located in the perforations.

2. The multi-position interference effect system for wind tunnel pressure measurement and force measurement tests according to claim 1, characterized in that: The horizontal moving mechanism includes a first motor, a screw rod and a moving block. The first motor and the screw rod are both installed in the installation groove. The output shaft of the first motor is connected to the screw rod. The first motor drives the screw rod to rotate. The moving block is provided with a threaded hole and is connected to the screw rod through the threaded hole in a mating manner. The rotating mechanism is arranged on the moving block.

3. The multi-position interference effect system for wind tunnel pressure measurement and force measurement tests according to claim 2, wherein: A strip-shaped mounting seat is arranged at the bottom of the installation groove. The screw rod is rotatably arranged above the strip-shaped mounting seat. The first motor is arranged at one end of the strip-shaped mounting seat. The strip-shaped mounting seat is slidably connected to the bottom of the moving block.

4. The multi-position interference effect system for wind tunnel pressure measurement and force measurement tests according to claim 3, characterized in that: A chute is arranged on the upper surface of the strip-shaped mounting seat. A slider is arranged at the bottom of the moving block. The slider is slidably connected to the chute in a mating manner.

5. The multi-position interference effect system for wind tunnel pressure measurement and force measurement tests according to claim 1, characterized in that: The rotating mechanism includes a second motor. The second motor is installed upward on the horizontal moving mechanism. The rotating bearing platform is installed on the output shaft of the second motor.

6. The multi-bit interference effect system for wind tunnel pressure measurement and force measurement tests according to claim 1, characterized in that: A fixing hole for fixing the interference model is arranged in the middle of the rotating bearing platform.

7. The multi-position interference effect system for wind tunnel pressure measurement and force measurement tests according to claim 1, characterized in that: The upper surface of the flat track is flush with the upper surface of the turntable.

8. The multi-position interference effect system for wind tunnel pressure measurement and force measurement tests according to claim 1, characterized in that: The rolling curtain unit includes a driving rolling curtain machine and a driven rolling curtain machine. The driving rolling curtain machine and the driven rolling curtain machine are respectively arranged at both ends of the upper part of the installation groove. Both ends of the flat track are respectively connected to the reels of the driving rolling curtain machine and the driven rolling curtain machine. The reel of the driving rolling curtain machine is driven to rotate by a third motor. The reel of the driven rolling curtain machine is provided with a restoring force by a spring.

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