A controllable multi-path downburst simulator

Abstract

The application discloses a controllable multi-path downburst simulator and belongs to the technical field of special wind simulation. In the structure, the downburst of various angles can be formed through the spherical connection of the lower cylinder shell, the high-speed fan is directly fixed through the foot support fixing frame, the foot support fixing frame is directly grounded, and the high-speed fan does not affect the test table when working, so that the structure is stable and firm. The structure can simulate the influence of the downburst on the ground when the downburst generates deflection, is convenient and fast to adjust, is stable in wind force control, has fewer interference factors of the test table, and is real in simulation effect.

Description

TECHNICAL FIELD

[0001] The present application belongs to the field of special wind simulation technology, and particularly relates to a controllable multi-path downburst simulator. BACKGROUND

[0002] Since the wind field structure of downburst cannot be simulated in a conventional boundary layer wind tunnel, a special simulator needs to be built to reproduce the special wind field of such extreme wind. In the actual environment, the angle of downburst will produce slight deflection. If a downburst simulator with angle deflection is to be built, the existing downburst simulator generally uses guide vanes or directly rotates the fan to realize the angle change of downburst. However, the guide vanes have gaps, or the vanes are flat, which will cause changes in wind force and wind diameter during guiding and turning, and cannot well simulate the actual wind force system. If the rotation of the high-speed fan is directly used for adjustment, the support frame will be shaken or the turning structure will be shaken due to excessive wind force during the rotation, resulting in instability of the equipment. SUMMARY

[0003] Therefore, the present application aims to provide a controllable multi-path downburst simulator which can ensure the stability of wind force and wind diameter and simulate the influence of downburst with deflection angle on the ground under the condition of fixed high-speed fan.

[0004] To achieve the above-mentioned purpose, the present application provides the following technical scheme:

[0005] The present application comprises a test table, a foot support fixing frame and a downburst machine. The foot support fixing frame is supported on the ground, the downburst machine is fixed on the foot support fixing frame, and the test table is located below the downburst machine. The downburst machine comprises a high-speed fan, an upper cylinder shell and a lower cylinder shell. The fan is fixed on the fixing frame, and the fan is located inside the top end of the upper cylinder shell. The lower end of the upper cylinder shell is in a spherical shape on the inside, the upper end of the lower cylinder shell is in a spherical shape on the outside, the upper end of the lower cylinder shell can be angularly turned and clamped into the lower end of the upper cylinder shell, a guide frame is further arranged on the lower end of the upper cylinder shell, a first motor is further fixed on the lower end of the upper cylinder shell, a driving bevel gear is arranged on the output end of the first motor, a driven bevel gear is coaxially arranged on the guide frame and engaged with the driving bevel gear, a support is fixed on the guide frame and extends to the side, a rack rod is movably arranged on the support, a second motor is fixed on the support, a first spiral shaft engaged with the rack rod is arranged on the output end of the second motor, a traction rod is hingedly connected to the end of the rack rod, and the free end of the traction rod is hingedly connected to the lower end of the lower cylinder shell.

[0006] Further, the test bench comprises a first seat shell, a second seat shell and an action table, the action table is slidably arranged in the second seat shell, a third motor is arranged inside the action table, a second screw shaft is arranged at the output end of the third motor, a first rack is engaged with the second screw shaft, and the first rack is fixed along the inner bottom surface of the second seat shell; the second seat shell is slidably arranged in the first seat shell, a fourth motor is arranged inside the second seat shell, a third screw shaft is arranged at the output end of the fourth motor, a second rack is engaged with the third screw shaft, and the second rack is fixed along the inner bottom surface of the first seat shell; and the sliding directions of the table and the second seat shell are perpendicular to each other.

[0007] Further, a plurality of first rolling wheels are arranged on the outer bottom surface of the action table and roll on the inner bottom surface of the second seat shell; and a plurality of second rolling wheels are arranged on the outer bottom surface of the second seat shell and roll on the inner bottom surface of the first seat shell.

[0008] Further, arc-shaped guide strips are fixed on both sides of the bracket, arc-shaped sliding grooves are arranged on the arc-shaped guide strips, sliding rods are fixed on both sides of the lower end of the lower cylinder shell, the sliding rods are slidably arranged in the arc-shaped sliding grooves, and stop tables are fixed on the sliding rods and arranged on the inner sides of the arc-shaped guide strips.

[0009] Further, a groove for filling simulated pool water is arranged on the action table.

[0010] Further, a bearing ring is fixed on the outer side of the lower end of the upper cylinder shell, the guide frame is arranged outside the bearing ring, and a plurality of rolling balls are arranged between the bearing ring and the guide frame.

[0011] The present application has the following beneficial effects:

[0012] The application provides wind power through a high-speed fan, blows downburst along the upper cylinder shell and the lower cylinder shell, rotates through a second motor, drives the rack bar to move horizontally on the support through the first spiral shaft, drives the traction rod to rotate the lower cylinder shell obliquely arranged at the lower end of the upper cylinder shell through the rack bar, forms a certain deflection angle, rotates the guide frame on the upper cylinder shell through the first motor, changes the direction of the downburst blowing to the test table, adjusts the impact angle and direction of the downburst to the test table through the cooperation of the first motor and the second motor, adjusts the angle and direction of the wind under the condition of ensuring the sealing and the blowing wind power and the unchanged wind diameter, forms the downburst of each angle through the lower cylinder shell in the structure, does not need to move the position of the high-speed fan, fixes the high-speed fan through the foot prop fixing frame, the foot prop fixing frame is directly grounded, does not affect the test table when the high-speed fan works, has the functions of stability and firmness, the structure can simulate the influence of the downburst on the ground when the downburst generates deflection, has the advantages of convenient adjustment, rapidness, stable wind power control, less interference factors of the test table and real simulation effect.

[0013] Additional advantages, objects, and features of the application will be set forth in part by the description that follows, and in part will become apparent to those skilled in the art upon examination of the following or can be learned by practice of the application. The objects and other advantages of the application can be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. BRIEF DESCRIPTION OF DRAWINGS

[0014] To make the objects, technical solutions and beneficial effects of the application clearer, the application provides the following drawings for description:

[0015] Figure 1 It is a whole schematic view of the downburst simulator of the embodiment of the application.

[0016] Figure 2 It is a first sectional view of the downburst simulator of the embodiment of the application.

[0017] Figure 3 It is a second sectional view of the downburst simulator of the embodiment of the application.

[0018] Figure 4 It is an enlarged schematic view of A in the figure. Figure 3

[0019] ​The marks in the drawings are as follows: 1, test bench; 11, first seat shell; 111, second rack; 12, second seat shell; 121, first rack; 122, fourth motor; 123, third screw shaft; 124, second rolling wheel; 13, action table top; 131, third motor; 132, second screw shaft; 133, first rolling wheel; 134, groove; 2, foot support fixing frame; 3, lower burst flow machine; 31, high-speed fan; 32, upper cylinder shell; 321, bearing ring; 322, ball; 33, lower cylinder shell; 331, sliding rod; 332, blocking table; 34, guide frame; 341, first motor; 342, driving bevel gear; 343, driven bevel gear; 344, support; 345, rack bar; 346, second motor; 347, first screw shaft; 348, traction rod; 349, arc-shaped guide bar; 3491, arc-shaped sliding groove. DETAILED DESCRIPTION

[0020] As Figures 1 to 4 shown, the application discloses a controllable multi-path downburst simulator, which comprises a test bench 1, a foot support fixing frame 2 and a lower burst flow machine 3, referring to Figure 1 , the foot support fixing frame 2 has four support legs supported on the ground, the upper parts of the four support legs are crossed at a point to form a fixed position of the lower burst flow machine 3, and the test bench 1 is located below the lower burst flow machine 3; the lower burst flow machine 3 comprises a high-speed fan 31, an upper cylinder shell 32 and a lower cylinder shell 33, the fan is fixed on the fixing frame, the fan is located inside the top end of the upper cylinder shell 32, the lower end of the upper cylinder shell 32 is in a spherical shape, the upper end of the lower cylinder shell 33 is in a spherical shape, the upper end of the lower cylinder shell 33 is angularly rotatable and clamped into the lower end of the upper cylinder shell 32, and a plurality of sealing rings can be arranged on the inner side of the spherical shell of the lower cylinder shell 33 to avoid air leakage; as Figure 2 , Figure 3 and Figure 4 shown, the lower end of the upper cylinder shell 32 is also rotatably provided with a guide frame 34, the outer side of the lower end of the upper cylinder shell 32 is fixedly provided with a bearing ring 321, the guide frame 34 is annularly arranged outside the bearing ring 321, a plurality of balls 322 are supported between the bearing ring 321 and the guide frame 34, the lower end of the upper cylinder shell 32 is further fixedly provided with a first motor 341, the output end of the first motor 341 is provided with a driving bevel gear 342, the guide frame 34 is coaxially provided with a driven bevel gear 343 engaged with the driving bevel gear 342, the guide frame 34 is fixedly extended to the side and provided with a support 344, the support 344 is transversely movably provided with a rack bar 345, the support 344 is fixedly provided with a second motor 346, the output end of the second motor 346 is provided with a first screw shaft 347 engaged with the rack bar 345, the end of the rack bar 345 is hingedly connected with a traction rod 348, and the free end of the traction rod 348 is hingedly connected to the lower end of the lower cylinder shell 33.

[0021] In the scheme, the wind power is provided by the high-speed fan 31, the downburst is blown along the upper cylinder shell 32 and the lower cylinder shell 33, the second motor 346 rotates, the first spiral shaft 347 drives the rack rod 345 to move horizontally on the support 344, the rack rod 345 drives the traction rod 348 to rotate the lower cylinder shell 33 arranged at the lower end of the upper cylinder shell 32 obliquely, a certain deflection angle is formed, the first motor 341 rotates to drive the driving bevel gear 342 to mesh with the driven bevel gear 343, so that the guide frame 34 rotates on the upper cylinder shell 32 to change the direction of the downburst blown to the test bed 1; through the cooperation of the first motor 341 and the second motor 346, the impact angle and direction of the downburst to the test bed 1 can be comprehensively adjusted, the upper cylinder shell 32 and the lower cylinder shell 33 connected in a ball shape can adjust the angle and direction of the wind without changing the sealing and the wind power and the wind diameter, in the structure, the downburst at various angles can be formed by the lower cylinder shell 33, the high-speed fan 31 does not need to be moved, the high-speed fan 31 is fixed by the foot prop fixing frame 2, the foot prop fixing frame 2 is directly grounded, and when the high-speed fan 31 works, the test bed 1 is not affected, the structure is stable and firm, the influence of the downburst on the ground when the downburst generates deflection can be simulated, the adjustment is convenient and fast, the wind power control is stable, and the test bed 1 has fewer interference factors and the simulation effect is real.

[0022] In a further scheme, as shown in Figure 2 and Figure 3 , the test bed 1 comprises a first seat shell 11, a second seat shell 12 and an action table 13, the action table 13 is slidably arranged in the second seat shell 12, the inside of the action table 13 is provided with a third motor 131, the output end of the third motor 131 is provided with a second spiral shaft 132, the second spiral shaft 132 is meshed with a first rack 121, and the first rack 121 is fixed along the inner bottom surface of the second seat shell 12; the second seat shell 12 is slidably arranged in the first seat shell 11, the inside of the second seat shell 12 is provided with a fourth motor 122, the output end of the fourth motor 122 is provided with a third spiral shaft 123, the third spiral shaft 123 is meshed with a second rack 111, and the second rack 111 is fixed along the inner bottom surface of the first seat shell 11; the sliding directions of the table and the second seat shell 12 are perpendicular to each other; the outer bottom surface of the action table 13 is provided with a plurality of first rolling wheels 133, and the first rolling wheels 133 roll on the inner bottom surface of the second seat shell 12; the outer bottom surface of the second seat shell 12 is provided with a plurality of second rolling wheels 124, and the second rolling wheels 124 roll on the inner bottom surface of the first seat shell 11.

[0023] In the structure, the reciprocating movement of the first rack 121 and the second rack 111 is driven by the second screw shaft 132 and the third screw shaft 123 respectively through the driving of the third motor 131 and the fourth motor 122, so as to drive the movement of the action platform 13 in the second seat shell 12 and the movement of the second seat shell 12 in the first seat shell 11, the movement directions of the action platform 13 and the second seat shell 12 are perpendicular, the position of the wind receiving point of the action platform 13 under the downwardly striking storm flow can be changed, the wind receiving point can cover the entire action platform 13 through the movement in two directions, through the structure, the influence of the moving downwardly striking storm flow on the ground can be simulated, different terrains can be arranged on the action platform 13, such as the groove 134 for filling simulated pool water arranged on the action platform 13, mountain terrain and the like, so as to simulate the influence of the downwardly striking storm flow on different terrains, and through numerical control, when the lower cylinder shell 33 rotates and deflects, the action platform 13 moves in cooperation, when the angle of the downwardly striking storm flow changes, the action point remains unchanged, that is, the influence of the downwardly striking storm flow on a single point of the action platform 13 when the angle deflects can be simulated.

[0024] In a further scheme, as shown in Figure 2 and Figure 3 The arc-shaped guide strips 349 are arranged on the two sides of the bracket 344, the arc-shaped sliding grooves 3491 are arranged on the arc-shaped guide strips 349, the slide rods 331 are arranged on the lower ends of the lower cylinder shell 33, the slide rods 331 slide in the arc-shaped sliding grooves 3491, the stop platforms 332 are fixed on the slide rods 331, and the stop platforms 332 are arranged on the inner sides of the arc-shaped guide strips 349.

[0025] In the structure, the arc-shaped guide strips 349 can guide and support the rotation of the lower cylinder shell 33, avoid the movement of the lower cylinder shell 33 caused by the wind force, and push the stop blocks and the slide rods 331 against the lower cylinder shell 33 to make it rotate when the bracket 344 is driven to rotate by the guide frame 34, so as to improve the stability of the entire guide frame 34 and protect the two hinge points of the traction rod 348 from the force in the rotation direction.

[0026] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present application but not limit the present application, although the present application has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined in the claims of the present application.

Claims

1. A controllable multipath downburst flow simulator, characterized in that: The test bench (1), a foot support frame (2), and a downburst generator (3) are included. The foot support frame (2) is supported on the ground, and the downburst generator (3) is fixed on the foot support frame (2). The test bench (1) is located below the downburst generator (3). The downburst generator (3) includes a high-speed fan (31), an upper shell (32), and a lower shell (33). The fan is fixed on the support frame and is located inside the top of the upper shell (32). The lower inner side of the upper shell (32) is spherical, and the upper outer side of the lower shell (33) is spherical. The upper end of the lower shell (33) can be rotated at multiple angles to fit into the lower end of the upper shell (32). The lower end of the upper shell (32) is also rotatably equipped with a guide frame (34). A first motor (341) is fixed at the lower end of the upper shell (32). The output end of the first motor (341) is provided with a driving bevel gear (342). The guide frame (34) is coaxially provided with a driven bevel gear (343) that meshes with the driving bevel gear (342). The guide frame (34) extends to the side and is fixed with a bracket (344). A rack rod (345) is provided on the bracket (344) for lateral movement. A second motor (346) is fixed on the bracket (344). The output end of the second motor (346) is provided with a first spiral shaft (347) that meshes with the rack rod (345). A traction rod (348) is hinged to the end of the rack rod (345). The free end of the traction rod (348) is hinged to the lower side of the lower shell (33).

2. The controllable multipath downburst flow simulator according to claim 1, characterized in that: The test bench (1) includes a first housing (11), a second housing (12), and an operating platform (13). The operating platform (13) is slidably disposed within the second housing (12). A third motor (131) is provided inside the operating platform (13). A second helical shaft (132) is provided at the output end of the third motor (131). The second helical shaft (132) meshes with a first rack (121). The first rack (121) moves along the second housing (12). The inner bottom surface is fixed; the second housing (12) is slidably disposed inside the first housing (11), and the second housing (12) is provided with a fourth motor (122), the output end of the fourth motor (122) is provided with a third spiral shaft (123), the third spiral shaft (123) meshes with a second rack (111), the second rack (111) is fixed along the inner bottom surface of the first housing (11); the sliding directions of the platform and the second housing (12) are perpendicular to each other.

3. The controllable multipath downburst flow simulator according to claim 2, characterized in that: The outer bottom surface of the working platform (13) is provided with a plurality of first rolling wheels (133), which roll on the inner bottom surface of the second housing (12); the outer bottom surface of the second housing (12) is provided with a plurality of second rolling wheels (124), which roll on the inner bottom surface of the first housing (11).

4. The controllable multipath downburst simulator according to claim 1, characterized in that: Arc-shaped guide strips (349) are fixedly extended on both sides of the bracket (344). Arc-shaped grooves (3491) are provided on the arc-shaped guide strips (349). Slide rods (331) are fixedly extended on both sides of the lower end of the lower cylinder shell (33). The slide rods (331) slide in the arc-shaped grooves (3491). A stop (332) is fixed on the slide rods (331). The stop (332) is blocked on the inner side of the arc-shaped guide strips (349).

5. The controllable multipath downburst flow simulator according to claim 2, characterized in that: The working platform (13) is provided with a groove (134) for filling simulated pool water.

6. The controllable multipath downburst flow simulator according to claim 1, characterized in that: A bearing ring (321) is fixedly provided on the outer side of the lower end of the upper cylindrical shell (32), and the guide frame (34) is arranged around the outer side of the bearing ring (321). A number of balls (322) are supported between the bearing ring (321) and the guide frame (34).

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