Mechanism swing adjusting structure for gust simulation device

Abstract

The invention discloses a mechanism swing amplitude adjusting structure for a gust simulation device. The mechanism swing amplitude adjusting structure comprises a driving main shaft, a crank mechanism, a connecting rod, a swing rod and a blade grid connecting shaft, the driving spindle is connected with a motor; the crank mechanism is connected with the driving main shaft and synchronously rotates along with the driving main shaft; the connecting rod is rotationally connected with the crank mechanism; the swing rod is connected with one end of the connecting rod away from the crank mechanism; one end of the cascade connecting shaft is connected with the swing rod, the other end of the cascade connecting shaft is connected with the cascade, and the cascade connecting shaft reciprocates along with the swing rod. The swing amplitude adjusting structure can adjust the swing amplitude of the blade grid, and the blade grid can move under the high-frequency and heavy-load working conditions.

Description

Technical Field

[0001] The invention relates to the technical field of wind tunnel testing, and more particularly to a mechanism swing amplitude regulating structure for a gust simulation device. Background Art

[0002] Most of the existing gust simulation devices are designed for low-speed wind tunnel tests. Due to the high blockage requirements and high operating speed and pressure of high-speed wind tunnels, the high-speed aerodynamic load of gust simulation devices of the same size is often several times the aerodynamic load of low-speed wind tunnels. Therefore, the gust generating device of the low-speed wind tunnel cannot be directly applied to the high-speed wind tunnel, and the development of high-speed gust simulation devices is very difficult.

[0003] The gust simulation device is an important equipment for my country's wind tunnel test to study the dynamic characteristics of aircraft in high-speed gust environments (unsteady loads, flight stability, structural strength and flight control). It makes high-frequency reciprocating swings in the flow field to make the flow field unstable, simulating the high-altitude gust environment. In order to achieve the swing of the blades, the motor needs to be connected to the drive device, and the drive device needs to be connected to the blades. In the high-speed flow field, the blades are subjected to alternating aerodynamic loads and inertial loads, and the operating conditions are complex and the loads are large. However, it is very difficult to adjust the swing amplitude of the blades and achieve smooth operation under high-frequency and heavy-load conditions.

[0004] Therefore, it is an urgent problem for technical personnel in this field to develop a mechanism swing amplitude adjustment structure for a gust simulation device that can adjust the swing amplitude of the blade grid and move under high-frequency and heavy-load conditions. Summary of the invention

[0005] In view of this, the present invention provides a mechanism swing amplitude adjustment structure for a gust simulation device that can adjust the swing amplitude of the blade grid and move under high-frequency and heavy-load conditions.

[0006] In order to achieve the above object, the present invention adopts the following technical solution:

[0007] A mechanism swing amplitude adjustment structure for a gust simulation device, comprising:

[0008] A driving spindle connected to the motor;

[0009] A crank mechanism, wherein the crank mechanism is connected to the driving spindle and rotates synchronously with the driving spindle;

[0010] A connecting rod, the connecting rod being rotatably connected to the crank mechanism;

[0011] A swing rod, the swing rod being connected to an end of the connecting rod away from the crank mechanism;

[0012] A blade cascade connecting shaft, one end of which is connected to the swing rod, and the other end of which is connected to the blade cascade, and the blade cascade connecting shaft reciprocates with the swing rod.

[0013] The beneficial effect of adopting the above technical solution is that the driving main shaft in the present invention drives the crank mechanism to rotate, thereby driving the connecting rod to move back and forth up and down, driving the rocker arm to swing, and the swing drives the blade connection shaft to rotate back and forth, thereby realizing the reciprocating swing of the blade.

[0014] Preferably, the crank mechanism comprises: a crank seat, a screw and a slider; the screw is connected to the crank seat, the slider is sleeved outside the screw and is threadedly connected to the screw; the connecting rod is rotatably connected to the slider. The slider can move on the screw to adjust the swing amplitude of the swing rod, thereby realizing the adjustment of the swing amplitude of the blade cascade.

[0015] Preferably, a flywheel is provided on the side of the crank seat close to the driving spindle, and a connecting flange is provided on the side of the flywheel away from the crank seat, the connecting flange is fixedly connected to the crank seat, and the driving spindle is passed through the connecting flange and key-connected to the connecting flange. The key connection between the driving spindle and the connecting flange can ensure that the flywheel and the crank seat rotate synchronously with the driving spindle.

[0016] Preferably, the threads of the two ends of the screw are in opposite directions, and the end of the screw away from the slider is threadedly connected with a counterweight. The counterweight can move relatively synchronously with the slider, and the position of the counterweight changes synchronously with the slider when the crank seat rotates, which can eliminate the system vibration caused by the unbalanced force generated by the eccentricity of the slider.

[0017] Preferably, the crank seat is connected with a polished rod, the polished rod is arranged in parallel with the screw rod, and the polished rod passes through the slider and the counterweight block and is slidably connected with the slider and the counterweight block. The polished rod can guide the movement of the slider and the counterweight block.

[0018] Preferably, locking nuts are provided at both ends of the screw rod, and the locking nuts can lock the position of the screw rod, thereby preventing the position of the slider from changing when the crank seat rotates.

[0019] It can be seen from the above technical solutions that, compared with the prior art, the present invention discloses a mechanism swing amplitude adjustment structure for a gust simulation device, which has the following beneficial effects:

[0020] (1) In the present invention, the reciprocating swing of the blade cascade can be achieved through the combined action of the crank mechanism, the connecting rod and the rocker rod;

[0021] (2) The slider can move on the surface of the screw when driven by the screw. The change of the slider position will change the swing amplitude of the rocker arm, thereby adjusting the swing amplitude of the blade grid. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0023] Figure 1 A schematic diagram of the structure of the swing amplitude adjustment structure provided by the present invention;

[0024] Figure 2 A schematic diagram of the structure of one side of the crank mechanism and the connecting rod provided by the present invention;

[0025] Figure 3 This is a schematic structural diagram of one side of the crank mechanism provided by the present invention connected to the driving spindle.

[0026] Among them, in the figure,

[0027] 1- driving spindle;

[0028] 2-crank mechanism;

[0029] 21-crank seat; 22-screw rod; 23-slider; 24-flywheel; 25-connecting flange; 26-counterweight block; 27-naked rod;

[0030] 3-connecting rod; 4-rocker arm; 5-blade connecting shaft. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] The embodiment of the present invention discloses a mechanism swing amplitude adjustment structure for a gust simulation device, comprising:

[0033] A driving spindle 1 is connected to the motor;

[0034] A crank mechanism 2, which is connected to the driving spindle 1 and rotates synchronously with the driving spindle 1;

[0035] A connecting rod 3, the connecting rod 3 is rotatably connected to the crank mechanism 2;

[0036] A swing rod 4, the swing rod 4 is connected to an end of the connecting rod 3 away from the crank mechanism 2;

[0037] The cascade connecting shaft 5 has one end connected to the swing rod 4 and the other end connected to the cascade. The cascade connecting shaft 5 reciprocates with the swing rod 4. The end of the swing rod 4 connected to the cascade connecting shaft 5 rotates, and the end connected to the connecting rod 3 swings up and down. The cascade connecting shaft 5 is connected to the cascade, and the rotation of the swing rod 4 drives the cascade connecting shaft 5 to rotate, thereby driving the cascade to swing back and forth.

[0038] In order to further optimize the above technical solution, the crank mechanism 2 includes: a crank seat 21, a screw rod 22 and a slider 23; the screw rod 22 is connected to the crank seat 21, the slider 23 is sleeved on the outside of the screw rod 22 and is threadedly connected to the screw rod 22; the connecting rod 3 is rotationally connected to the slider 23.

[0039] In order to further optimize the above technical solution, a flywheel 24 is provided on the side of the crank seat 21 close to the driving main shaft 1, and a connecting flange 25 is provided on the side of the flywheel 24 away from the crank seat 21. The connecting flange 25 is fixedly connected to the crank seat 21, and the driving main shaft 1 is passed through the connecting flange 25 and is key-connected to the connecting flange 25.

[0040] A through hole is provided at the position where the flywheel 24 is connected to the connecting flange 25 for inserting the connecting flange 25, and the flywheel 24 structure is increased. The energy storage effect of the flywheel 24 is utilized to compensate for the motor power to a certain extent, and it can be disassembled according to the test requirements during the test operation.

[0041] In order to further optimize the above technical solution, the threads of the two ends of the screw rod 22 are in opposite directions, and the end of the screw rod 22 away from the slider 23 is threadedly connected to a counterweight block 26 .

[0042] In order to further optimize the above technical solution, the crank seat 21 is connected with a polished rod 27, which is arranged in parallel with the screw rod 22, and the polished rod 27 passes through the slider 23 and the counterweight 26, and is slidably connected with the slider 23 and the counterweight 26. The slider 23 and the counterweight 26 move on the polished rod 27 and the screw rod 22 at the same time, which can improve the stability of the movement of the slider 23.

[0043] In order to further optimize the above technical solution, locking nuts are provided at both ends of the screw rod 22. When the position of the slider 23 needs to be adjusted, the locking nuts are removed, and then the screw rod 22 is rotated, and the slider 23 moves on the surface of the screw rod 22. When the slider 23 moves into place, the locking nuts are installed to limit the position of the slider 23.

[0044] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0045] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A swing amplitude adjustment structure for a gust simulation device, characterized in that: include: A driving spindle (1), wherein the driving spindle (1) is connected to a motor; A crank mechanism (2), wherein the crank mechanism (2) is connected to the driving main shaft (1) and rotates synchronously with the driving main shaft (1); A connecting rod (3), wherein the connecting rod (3) is rotatably connected to the crank mechanism (2); A swing rod (4), the swing rod (4) being connected to an end of the connecting rod (3) away from the crank mechanism (2); A blade cascade connecting shaft (5), one end of which is connected to the swing rod (4), and the other end of which is connected to the blade cascade, and the blade cascade connecting shaft (5) reciprocates with the swing rod (4).

2. The swing amplitude adjustment structure for a gust simulation device according to claim 1, characterized in that: The crank mechanism (2) comprises: a crank seat (21), a screw rod (22) and a slider (23); the screw rod (22) is connected to the crank seat (21), the slider (23) is sleeved on the outside of the screw rod (22) and is threadedly connected to the screw rod (22); the connecting rod (3) is rotationally connected to the slider (23).

3. The swing amplitude adjustment structure for a gust simulation device according to claim 2, characterized in that: A flywheel (24) is arranged on a side of the crank seat (21) close to the driving main shaft (1), and a connecting flange (25) is arranged on a side of the flywheel (24) away from the crank seat (21); the connecting flange (25) is fixedly connected to the crank seat (21), and the driving main shaft (1) is inserted into the connecting flange (25) and is key-connected to the connecting flange (25).

4. The swing amplitude adjustment structure for a gust simulation device according to claim 2 or 3, characterized in that: The threads of the two ends of the screw rod (22) are in opposite directions, and one end of the screw rod (22) away from the slider (23) is threadedly connected to a counterweight block (26).

5. The swing amplitude adjustment structure for a gust simulation device according to claim 4, characterized in that: The crank seat (21) is connected with a polished rod (27), the polished rod (27) is arranged in parallel with the screw rod (22), and the polished rod (27) passes through the slider (23) and the counterweight (26), and is slidably connected with the slider (23) and the counterweight (26).

6. The swing amplitude adjustment structure for a gust simulation device according to claim 2, characterized in that: Locking nuts are provided at both ends of the screw rod (22).

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