A continuous variable sideslip mechanism specially used in wind tunnel

Abstract

The invention discloses a continuous variable side sliding mechanism dedicated to a wind tunnel, which relates to the field of aerospace wind tunnel test technology, including a side sliding middle bracket, a rear push rod guide rail pair, a rear push rod slider seat, a side sliding rear push rod, a side sliding joint, a scissor-type front push rod assembly, a front push rod slider seat and a front push rod guide rail pair; the rear push rod guide rail pair is transversely arranged in the middle of the side sliding middle bracket, and the front push rod guide rail pair is longitudinally arranged on the edge of the side sliding middle bracket; one side of the side sliding rear push rod is hinged on the rear push rod slider seat, and the other side is hinged on the rear end of the side sliding joint, and the rear push rod slider seat is slidably arranged on the rear push rod guide rail pair; one end of the scissor-type front push rod assembly is arranged on the front side of the side sliding joint in a hinged form, and the other end is connected to the front push rod slider seat in a hinged form, and the front push rod slider seat is slidably arranged on the front push rod guide rail pair. The invention realizes the ability to realize continuous change of side angle during the test process.

Description

Technical Field

[0001] The present invention relates to the technical field of aerospace wind tunnel testing, and more specifically to the technical field of continuous variable sideslip mechanisms dedicated to wind tunnels. Background Art

[0002] Wind tunnel tests are mainly carried out based on the principle of relative motion, that is, compared to the actual flight in which the aircraft moves at a certain speed in a relatively static atmospheric environment, in wind tunnel tests, the aircraft model is usually mounted on a fixed support mechanism, and the airflow upstream of the model flows through the model at a certain speed, wherein the change in the attitude angle of the model relative to the wind tunnel flow can be achieved through the movement of the model support mechanism. In the test, a scimitar mechanism is used to achieve continuous changes in the longitudinal attitude angle, while changes in the sideslip angle of the model require the use of a dedicated sideslip device. The prior art discloses the following technologies:

[0003] The patent with the publication number CN113532791A and the patent name "A wind tunnel model continuously variable angle of attack and sideslip angle mechanism" discloses the following content: A wind tunnel model continuously variable angle of attack and sideslip angle mechanism, including a shell, a triangular bracket is integrally installed at the rear end of the shell, a hollow shaft motor is installed inside the middle section of the shell, the output end of the hollow shaft motor is connected to the support rod joint through a transmission shaft, the transmission shaft is connected to the middle section of the shell through a tapered roller bearing, one end of the support rod joint is located at the front end of the shell, the axial direction of the support rod joint is an angular rotation axis, the hollow shaft motor drives the support rod joint to rotate through the transmission shaft to realize rotation around the angular rotation axis, the lower part of the triangular bracket is perpendicular to its surface with a θ angle rotation axis, and the upper part of the triangular bracket is perpendicular to its surface with a θ angle tie rod shaft. The mechanism realizes that any combination of model angle of attack and sideslip angle can be obtained through automatic control during wind tunnel testing, which greatly improves the test efficiency of the wind tunnel and reduces the test cost.

[0004] The above patent and conventional side-slip devices do not have the ability to achieve continuous variable side-slip in tests. Summary of the invention

[0005] The purpose of the present invention is to solve the above technical problem and provide a continuous variable sideslip mechanism dedicated to a wind tunnel.

[0006] In order to achieve the above-mentioned purpose, the present invention specifically adopts the following technical solutions:

[0007] The present invention provides a continuous variable side sliding mechanism dedicated to a wind tunnel, comprising a side sliding middle bracket, a rear push rod guide rail pair, a rear push rod slider seat, a side sliding rear push rod, a side sliding joint, a scissor-type front push rod assembly, a front push rod slider seat and a front push rod guide rail pair;

[0008] The rear push rod guide rail pair is transversely arranged in the middle of the side sliding middle bracket, and the front push rod guide rail pair is longitudinally arranged on the edge of the side sliding middle bracket;

[0009] One side of the side-sliding rear push rod is hinged on the rear push rod slider seat, and the other side is hinged on the rear end of the side-sliding joint. The rear push rod slider seat is slidably arranged on the rear push rod guide rail pair.

[0010] One end of the scissor-type front push rod assembly is hingedly arranged on the front side of the side sliding joint, and the other end is hingedly connected to the front push rod slider seat, and the front push rod slider seat is slidably arranged on the front push rod guide rail pair.

[0011] Specifically, the continuously variable side sliding mechanism adopts an innovative three-dimensional multi-link structure. Figure 1 , Figure 2 shown.

[0012] The working process is as follows: During the test (it can also be fixed sideways without moving during the process of running to the specified position before the test), when the scissor-type front push rod assembly is fully opened and the two scissors are attached to the front push rod guide pair, and the sideways push rod is attached to the rear push rod guide pair, this state is the sideways zero position (such as Figure 3 , Figure 4 as shown).

[0013] When the two scissors of the scissor-type front push rod assembly move to a certain fitting position in the middle of the front push rod guide rail through the rear push rod slider seat, and the side sliding rear push rod moves forward to a certain fitting position, it is an angled side sliding to achieve continuous variable side sliding (the scissor-type front push rod assembly moves across the middle of the guide rail, and the side sliding rear push rod moves across the front end of the guide rail, such as Figure 5 the larger the sideslip angle shown).

[0014] In one embodiment, a scissors-type front push rod assembly includes a first front push rod and a second front slide rod, the first front push rod and the second front slide rod have the same structure, and the two are independently connected at the front side of the side sliding joint, there are two front push rod slide seats, the two front push rod slide seats are respectively hinged to the first front push rod and the second front slide rod, and the two front push rod slide seats are both slidably connected to the front push rod guide rail pair.

[0015] Specifically, the scissor-type front push rod assembly adopts a double-support isosceles triangle structure, which reduces the overall volume while ensuring the overall strength, reducing the blockage degree and the impact of the mechanism on the flow field.

[0016] In one embodiment, the first front push rod and the second front slide rod have the same structure, and both the first front push rod and the second front slide rod include a connecting seat and a longitudinal clamping groove fixed to the connecting seat by bolts, and the longitudinal clamping groove is slidably clamped with the front push rod guide rail pair.

[0017] In one embodiment, the rear push rod guide rail pair includes at least two parallel transverse guide rail pairs, and the rear push rod slider seat is provided with transverse clamping sliders of the same number as the transverse guide rail pairs, and each transverse clamping slider is slidably clamped in the corresponding transverse guide rail pair.

[0018] In one embodiment, the rear push rod guide rail pair includes two transverse guide rail pairs arranged in parallel.

[0019] In one embodiment, the rear push rod slider seat includes a base mounting plate formed in a triangle, a rectangle or a trapezoid, and the transverse clamping slider is detachably connected to the base mounting plate by a bolt assembly.

[0020] In one embodiment, a balance support rod is provided at the center of the sliding joint.

[0021] In one embodiment, the rear push rod guide rail pair and the front push rod guide rail pair are respectively arranged on two side surfaces of the side sliding middle bracket.

[0022] The beneficial effects of the present invention are as follows:

[0023] 1. The present invention is reasonably designed and can realize real-time change and measurement of the sideslip angle and roll angle of the model during the wind tunnel test, greatly improving the test efficiency. The device innovatively realizes the ability to continuously change the side angle during the test.

[0024] 2. The main structure adopts new materials, the device is light in weight, and the efficiency of mechanism replacement is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of a continuous variable side sliding mechanism dedicated to a wind tunnel of the present invention;

[0026] Figure 2 It is a structural schematic diagram of another perspective of a continuous variable sideslip mechanism dedicated to a wind tunnel of the present invention;

[0027] Figure 3 yes Figure 2 A top view of

[0028] Figure 4 yes Figure 1 Schematic diagram of the local structure;

[0029] Figure 5 It is a structural schematic diagram of the continuously variable sideslip angle of the present invention;

[0030] Figure markings: 1-side sliding middle bracket, 2-rear push rod guide pair, 3-rear push rod slider seat, 4-side sliding rear push rod, 5-side sliding joint, 6-scissor-type front push rod assembly, 7-front push rod slider seat, 8-front push rod guide pair, 9-balance support rod. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. 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.

[0033] It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0034] In the description of the embodiments of the present invention, it should be noted that the terms "inside", "outside", "upper", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the inventive product is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0035] Example 1

[0036] like Figures 1 to 5 As shown, this embodiment provides a continuous variable side sliding mechanism dedicated to a wind tunnel, including a side sliding middle bracket 1, a rear push rod guide rail pair 2, a rear push rod slider seat 3, a side sliding rear push rod 4, a side sliding joint 5, a scissor-type front push rod assembly 6, a front push rod slider seat 7 and a front push rod guide rail pair 8;

[0037] The rear push rod guide rail pair 2 is transversely arranged in the middle of the side sliding middle bracket 1, and the front push rod guide rail pair 8 is longitudinally arranged on the edge of the side sliding middle bracket 1;

[0038] One side of the side-sliding rear push rod 4 is hinged on the rear push rod slider seat 3, and the other side is hinged on the rear end of the side-sliding joint 5. The rear push rod slider seat 3 is slidably arranged on the rear push rod guide rail pair 2. The rear push rod guide rail pair 2 and the front push rod guide rail pair 8 are respectively arranged on the two side surfaces of the side-sliding middle bracket 1;

[0039] One end of the scissor-type front push rod assembly 6 is hingedly arranged on the front side of the side sliding joint 5, and the other end is hingedly connected to the front push rod slider seat 7, and the front push rod slider seat 7 is slidably arranged on the front push rod guide rail pair 8.

[0040] Specifically, the continuously variable side sliding mechanism adopts an innovative three-dimensional multi-link structure. Figure 1 , Figure 2 shown.

[0041] The working process is as follows: during the test (it can also be fixed sideways without moving during the process of running to the specified position before the test), when the scissor-type front push rod assembly 6 is fully opened and the two scissors are attached to the front push rod guide pair 8, and the side-sliding rear push rod 4 is attached to the rear push rod guide pair 2, this state is the side-sliding zero position (such as Figure 5 , state of β=0°).

[0042] When the two scissors of the scissor-type front push rod assembly 6 move to a certain fitting position in the middle of the front push rod guide rail pair 8 through the rear push rod slider seat 3, and the side-sliding rear push rod 4 moves forward to a certain fitting position, it is a side-sliding with an angle, realizing continuous variable side-sliding (the scissor-type front push rod assembly 6 moves across the middle of the guide rail, and the side-sliding rear push rod 4 moves across the front end of the guide rail, such as Figure 5 the larger the sideslip angle shown).

[0043] Example 2

[0044] This embodiment is further optimized on the basis of embodiment 1, specifically:

[0045] The scissors-type front push rod assembly 6 includes a first front push rod and a second front slide rod. The first front push rod and the second front slide rod have the same structure and are independently connected at the front side of the side sliding joint 5. There are two front push rod slide seats 7. The two front push rod slide seats 7 are respectively hinged to the first front push rod and the second front slide rod. Both front push rod slide seats 7 are slidably connected to the front push rod guide rail pair 8.

[0046] Specifically, the scissor-type front push rod assembly 6 adopts a double-support isosceles triangle structure, which reduces the overall volume while ensuring the overall strength, reduces the blockage degree, and reduces the impact of the mechanism on the flow field.

[0047] The first front push rod and the second front slide rod have the same structure. Both the first front push rod and the second front slide rod include a connecting seat and a longitudinal clamping groove fixed to the connecting seat by bolts. The longitudinal clamping groove is slidably clamped with the front push rod guide rail pair 8.

[0048] Example 3

[0049] This embodiment is further optimized on the basis of Embodiment 1 or Embodiment 2, specifically:

[0050] The rear push rod guide rail pair 2 includes at least two parallel transverse guide rail pairs. The rear push rod slider seat 3 is provided with transverse clamping sliders of the same number as the transverse guide rail pairs. Each transverse clamping slider is slidably clamped in the corresponding transverse guide rail pair.

[0051] Example 4

[0052] This embodiment is further optimized on the basis of embodiment 3, specifically:

[0053] The rear push rod guide rail pair 2 comprises two transverse guide rail pairs arranged in parallel.

[0054] The rear push rod slider seat 3 includes a base mounting plate formed in a triangle, a rectangle or a trapezoid, and the transverse clamping slider is detachably connected to the base mounting plate through a bolt assembly.

[0055] A balance support rod 9 is arranged at the center of the side sliding joint 5 .

Claims

1. A continuous variable side sliding mechanism for a wind tunnel, characterized in that: It comprises a side-sliding middle bracket (1), a rear push rod guide rail pair (2), a rear push rod slider seat (3), a side-sliding rear push rod (4), a side-sliding joint (5), a scissor-type front push rod assembly (6), a front push rod slider seat (7) and a front push rod guide rail pair (8); The rear push rod guide rail pair (2) is transversely arranged in the middle of the side-sliding middle bracket (1), and the front push rod guide rail pair (8) is longitudinally arranged on the edge of the side-sliding middle bracket (1); One side of the side-sliding rear push rod (4) is hinged on the rear push rod slider seat (3), and the other side is hinged on the rear end of the side-sliding joint (5); the rear push rod slider seat (3) is slidably arranged on the rear push rod guide rail pair (2); One end of the scissor-type front push rod assembly (6) is hingedly arranged on the front side of the side sliding joint (5), and the other end is hingedly connected to the front push rod slider seat (7), and the front push rod slider seat (7) is slidably arranged on the front push rod guide rail pair (8); A balance support rod (9) is arranged at the center of the side sliding joint (5); The scissor-type front push rod assembly (6) includes a first front push rod and a second front slide rod, the first front push rod and the second front slide rod have the same structure, and the two are independently connected to the front side of the side sliding joint (5), the number of the front push rod slider seats (7) is two, the two front push rod slider seats (7) are respectively hinged to the first front push rod and the second front slide rod, and the two front push rod slider seats (7) are both slidably connected to the front push rod guide rail pair (8).

2. The continuous variable side sliding mechanism for a wind tunnel according to claim 1, characterized in that: The first front push rod and the second front slide rod have the same structure. Both the first front push rod and the second front slide rod comprise a connecting seat and a longitudinal engaging slide groove fixed to the connecting seat by bolts. The longitudinal engaging slide groove is slidably engaged with the front push rod guide rail pair (8).

3. The continuous variable side sliding mechanism for a wind tunnel according to claim 1, characterized in that: The rear push rod guide rail pair (2) comprises at least two transverse guide rail pairs arranged in parallel, and the rear push rod slider seat (3) is provided with transverse clamping sliders of the same number as the transverse guide rail pairs, and each transverse clamping slider is slidably clamped in the corresponding transverse guide rail pair.

4. The continuous variable side sliding mechanism for a wind tunnel according to claim 3, characterized in that: The rear push rod guide rail pair (2) comprises two transverse guide rail pairs arranged in parallel.

5. The continuous variable side sliding mechanism for a wind tunnel according to claim 3, characterized in that: The rear push rod slider seat (3) comprises a base mounting plate formed in a triangle, a rectangle or a trapezoid, and the transverse clamping slider is detachably connected to the base mounting plate via a bolt assembly.

6. The continuous variable side sliding mechanism for a wind tunnel according to claim 1, characterized in that: The rear push rod guide rail pair (2) and the front push rod guide rail pair (8) are respectively arranged on two side surfaces of the side-sliding middle bracket (1).

Images