Hoisting mechanism of turntable door for wind tunnel test

Abstract

The utility model discloses a hoisting mechanism of a turntable door for a wind tunnel test, which comprises a bearing plate, the upper end of the bearing plate is fixedly connected with two fixed slideways, the two fixed slideways are internally connected with telescopic rods in a sliding manner, the right sides of the two telescopic rods extend to the outside, the left sides of the two telescopic rods are provided with threaded holes, and the two fixed slideways are fixedly connected with the bearing plate. And telescopic lead screws are in threaded connection with the interiors of the two threaded holes correspondingly, small worm wheels are installed on the two telescopic lead screws correspondingly, a speed reducer support is fixedly connected to the upper end of the bearing plate, and a driving assembly is installed on the left side of the speed reducer support. According to the hoisting structure, the bevel gear is used for driving the gear shaft, the worm gear and the worm are meshed, so that the two lead screws rotate, the distance between the two telescopic rods is larger, the edge position of the turntable door can be fixed during hoisting, the hoisting stability is improved, and the hoisting structure is simple and practical.

Description

Technical Field

[0001] The utility model relates to the technical field of wind tunnel tests, in particular to a hoisting mechanism for a turntable door used in a wind tunnel test. Background Art

[0002] The airfoil model of the wind tunnel is a commonly used device in scientific research and production, especially in the design of aerospace vehicles and other fields. The airfoil model is installed on the turntable door of the wind tunnel test section. The installation accuracy in the wind tunnel directly affects the accuracy of the test data, and the installation speed of the model significantly affects the efficiency of the experiment.

[0003] After searching, the Chinese utility model patent with publication number CN220542394U discloses an automatic opening and closing device for a turntable door used in a wind tunnel test, which adopts a technical solution including a translation mechanism, a lifting mechanism, a hoisting mechanism, and a hanging bracket, wherein two of the hanging brackets are connected to the end face of the turntable door, the hanging bracket is detachably connected to the hoisting mechanism, the hoisting mechanism is connected to the lifting mechanism, and the lifting mechanism is connected to the translation mechanism. The hoisting mechanism is installed on the left and right sides of the turntable door following the translation mechanism, and has the advantages of simple structure, fast response, and accurate positioning. The automatic opening and closing of the turntable door can be realized, making the disassembly and maintenance of the model more convenient and quick;

[0004] However, when the hoisting mechanism of the above-mentioned utility model is in use, the operation of the servo motor is used to control the rotation of the two telescopic screw rods through the transmission of the gear set. Due to the limitation of the diameter of the gears of the gear set, the distance between the two telescopic rods is small. Since the volume of the turntable door is large, the hoisting position is close to the center position of the turntable door during hoisting, which will cause instability during hoisting. Therefore, it is necessary to design a hoisting mechanism for the turntable door for wind tunnel testing to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to solve the shortcomings existing in the prior art and to propose a hoisting mechanism for a turntable door for a wind tunnel test. The hoisting structure utilizes a bevel gear to drive a gear shaft and utilizes the meshing of a worm wheel and a worm to rotate the two lead screws, thereby increasing the spacing between the two telescopic rods, thereby being able to fix the edge position of the turntable door during hoisting, thereby improving the stability during hoisting, and having a simple and practical structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The camshaft is an axially-coupled device for translating a plurality of gears into and out of the gears, and the plurality of gears are coupled to the gear train of the two gear trains, wherein the plurality of gears are coupled to the gear trains and the plurality of gears are coupled to the gear trains.

[0008] Preferably, the driving assembly includes a servo motor and a reducer, the reducer is installed on the left side of the reducer support, the servo motor is installed on the left side of the reducer, and the output shaft of the reducer is fixedly connected to the input shaft of the telescopic coupling.

[0009] Preferably, the upper end of the bearing plate is fixedly connected with a bearing seat, an angular contact bearing is arranged in the bearing seat, the telescopic coupling passes through the angular contact bearing, and a bearing retaining ring is arranged on the left side of the bearing seat.

[0010] Preferably, the bearing seat is provided with a plurality of threaded holes, the bearing retaining ring is provided with a plurality of bolts, and the plurality of bolts are threadedly connected to the inner walls of the threaded holes.

[0011] Preferably, a flat washer is provided between the plurality of bolts and the bearing seat.

[0012] Preferably, the fixed slideway is cast with ductile iron, and the inner wall of the fixed slideway is provided with a polymer coating.

[0013] Compared with the existing technology, the advantages of this device are:

[0014] By replacing the transmission of the gear set with bevel gears, gear shafts and small worm gears, the distance between the two telescopic rods is increased, and the edge position of the turntable door can be fixed during the hoisting process, making the hoisting process more stable. The gear shaft is used instead of the gear transmission, and the structure is simpler and more practical, which is also convenient for later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of a hoisting mechanism for a turntable door for a wind tunnel test proposed by the utility model;

[0016] Figure 2 for Figure 1 Left view of

[0017] Figure 3 for Figure 1 Top view of the .

[0018] In the figure: 1 bearing plate, 2 fixed slideway, 3 telescopic screw, 4 small worm gear, 5 gear shaft, 6 active bevel gear, 7 bearing seat, 8 angular contact bearing, 9 telescopic coupling, 10 driving assembly, 11 bearing retaining ring, 12 telescopic rod, 13 reducer support. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0020] Reference Figure 1-Figure 3 A hoisting mechanism for a turntable door for a wind tunnel test comprises a bearing plate 1. When hoisting, two hoisting mechanisms need to be fixed at the middle position of the tops of two existing moving carriages and installed horizontally. The upper end of the bearing plate 1 is fixedly connected to two fixed slideways 2, and telescopic rods 12 are slidably connected in the two fixed slideways 2. A clearance fit is adopted between the telescopic rods 12 and the fixed slideways 2. The right sides of the two telescopic rods 12 extend to the outside. The centers of the two telescopic rods 12 are penetrated by threaded holes, and telescopic screw rods 3 are threadedly connected in the two threaded holes. Small worm gears 4 are installed on the two telescopic screw rods 3. A reducer support 13 is fixedly connected to the upper end of the bearing plate 1. A drive assembly 10 is installed on the left side of the reducer support 13, and a drive assembly 10 is installed on the right side of the reducer support 13. A telescopic coupling 9 is provided, and the output shaft of the driving assembly 10 is fixedly connected to the input shaft of the telescopic coupling 9. An active bevel gear 6 is fixedly connected to the output shaft of the telescopic coupling 9. A plurality of fixed blocks are fixedly connected to the upper end of the bearing plate 1. The plurality of fixed blocks are connected to a gear shaft 5 for common rotation. A driven bevel gear is provided on the gear shaft 5. The modules of the active bevel gear 6 and the driven bevel gear are both 4. Both ends of the gear shaft 5 are provided with a threaded layer that cooperates with the small worm gear 4. The threaded layer is a threaded layer similar to that of a worm. The small worm gear 4 is meshed with the corresponding threaded layer. The straightness of the telescopic screw 3, the telescopic rod 12 and the fixed slide 2 are respectively 0.01. Openings are provided on the right sides of the two telescopic rods 12. The opening of the telescopic rod 12 and the thickness of the edge of the hanging disc are clearance-matched.

[0021] The driving assembly 10 includes a servo motor and a reducer. The reducer is installed on the left side of the reducer support 13 , the servo motor is installed on the left side of the reducer, and the output shaft of the reducer is fixedly connected to the input shaft of the telescopic coupling 9 .

[0022] Among them, the upper end of the bearing plate 1 is fixedly connected to a bearing seat 7, an angular contact bearing 8 is arranged in the bearing seat 7, a telescopic coupling 9 passes through the angular contact bearing 8, a bearing retaining ring 11 is arranged on the left side of the bearing seat 7, a plurality of threaded holes are arranged on the bearing seat 7, a plurality of bolts are arranged on the bearing retaining ring 11, a plurality of bolts are threadedly connected to the inner wall of the threaded hole, and a flat washer is arranged between the plurality of bolts and the bearing seat 7.

[0023] Among them, the fixed slide 2 is cast with ductile iron and isothermally quenched. The inner wall of the fixed slide 2 is provided with a polymer coating to improve the wear resistance of the inner wall. The telescopic rod 12 has high requirements for rigidity and elasticity. It is made of 30GrMnSi, normalized, and sandblasted on the surface.

[0024] The functional principle of the utility model can be explained through the following operation mode: two sets of hoisting mechanisms are fixed at the middle position of the top of two moving carriages and installed horizontally;

[0025] Then the two servo motors run, the servo motors drive the active bevel gear 6 to rotate, the active bevel gear 6 drives the driven bevel gear to rotate, the driven bevel gear drives the gear shaft 5 to rotate, the worm-like threaded layers at both ends of the gear shaft 5 are in a meshing state with the small worm gear 4, thereby driving the small worm gear 4 on the telescopic lead screw 3 to rotate, thereby realizing the linear motion of the telescopic rod 12, and the four telescopic rods 12 work at the same time to ensure that the turntable door can be lifted safely and smoothly.

[0026] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hoisting mechanism for a turntable door for a wind tunnel test, comprising a bearing plate (1), characterized in that: The upper end of the bearing plate (1) is fixedly connected to two fixed slideways (2), and telescopic rods (12) are slidably connected in the two fixed slideways (2). The right sides of the two telescopic rods (12) extend to the outside. The centers of the two telescopic rods (12) are penetrated by threaded holes, and telescopic screw rods (3) are threadedly connected in the two threaded holes. Small worm gears (4) are installed on the two telescopic screw rods (3). The upper end of the bearing plate (1) is fixedly connected to a reducer support (13), and the left side of the reducer support (13) is installed. A drive assembly (10), a telescopic coupling (9) is provided on the right side of the reducer support (13), the output shaft of the drive assembly (10) is fixedly connected to the input shaft of the telescopic coupling (9), the output shaft of the telescopic coupling (9) is fixedly connected to a driving bevel gear (6), the upper end of the carrier plate (1) is fixedly connected to a plurality of fixed blocks, the plurality of fixed blocks are rotatably connected to a gear shaft (5), the gear shaft (5) is provided with a driven bevel gear, and both ends of the gear shaft (5) are provided with threaded layers that cooperate with a small worm gear (4).

2. The hoisting mechanism of a turntable door for wind tunnel testing according to claim 1, characterized in that: The driving assembly (10) comprises a servo motor and a reducer, wherein the reducer is mounted on the left side of the reducer support (13), the servo motor is mounted on the left side of the reducer, and the output shaft of the reducer is fixedly connected to the input shaft of the telescopic coupling (9).

3. The hoisting mechanism of a turntable door for wind tunnel testing according to claim 1, characterized in that: The upper end of the bearing plate (1) is fixedly connected to a bearing seat (7), an angular contact bearing (8) is arranged inside the bearing seat (7), the telescopic coupling (9) passes through the angular contact bearing (8), and a bearing retaining ring (11) is arranged on the left side of the bearing seat (7).

4. The hoisting mechanism of the turntable door for wind tunnel test according to claim 3, characterized in that: The bearing seat (7) is provided with a plurality of threaded holes, the bearing retaining ring (11) is provided with a plurality of bolts, and the plurality of bolts are threadedly connected to the inner walls of the threaded holes.

5. The hoisting mechanism of the turntable door for wind tunnel test according to claim 4, characterized in that: Flat washers are provided between the plurality of bolts and the bearing seat (7).

6. The hoisting mechanism of a turntable door for wind tunnel testing according to claim 1, characterized in that: The fixed slideway (2) is cast with ductile iron, and the inner wall of the fixed slideway (2) is provided with a high polymer coating.

Images