A large corner vane

Abstract

The application discloses a large corner guide vane, which comprises a guide vane body, a bottom surface fixed support assembly and a bottom surface one-way sliding support assembly arranged on the bottom surface of the guide vane body, and a top surface fixed support assembly and a top surface one-way sliding support assembly arranged on the top surface of the guide vane body; the application provides sufficient rigidity for the guide vane body to bear high-speed airflow load, and can allow the guide vane body to release thermal deformation in the length direction along the first and second connecting line directions, and can also release thermal deformation in the height direction along the vertical direction; when the connecting component on the guide vane body is subjected to thermal expansion, the thermal deformation of the connecting component is released through elastic displacement, so that the thermal deformation from the guide vane body and the connecting component is reduced to the maximum extent, and the safety and reliability of the large guide vane are significantly enhanced.

Description

Technical Field

[0001] This invention relates to the field of wind tunnel equipment, and more specifically to a large corner guide vane. Background Technology

[0002] Corner guide vanes are typically installed in arrays in recirculating wind tunnels to guide airflow smoothly at corners, minimizing airflow separation, energy loss, and eddies, thus ensuring uniform and stable airflow in subsequent test sections. For large low-speed wind tunnels, each guide vane in the array has a very large chord length, height, and mass; for example, its height can reach 20-40 meters, and its weight can approach 100 tons. During wind tunnel operation, in addition to deformation caused by aerodynamic loads, the guide vanes also undergo thermal deformation due to the high temperature inside the tunnel. If the structural thermal deformation of the guide vanes cannot be effectively released, very large thermal stresses will be generated, which may cause structural damage to the guide vanes and the wind tunnel structure in severe cases.

[0003] In existing technologies, to address the thermal deformation problem of large guide vanes, patent CN118730466A discloses a wind tunnel corner guide device. This device utilizes a shaped wall to fix an array of guide vanes and employs cables to connect the guide vanes' connectors. The prestress of the cables counteracts their thermal stress, while the tension and deformation of the cables also counteract the thermal deformation of the guide vanes in the diagonal direction. However, this cable- and shaped wall-based structure is overly complex and difficult to install. Furthermore, the cable-based method of counteracting thermal deformation requires cumbersome and precise design of the cable's prestress, connection position, and materials, resulting in low versatility and reliability. Moreover, the cable structure needs to act on the connectors on the guide vanes, forcing the guide vanes to adopt a segmented structure. This segmented structure not only has low stiffness but also allows the connectors on each guide vane to have uncontrollable effects on airflow.

[0004] Therefore, it is necessary to effectively reduce the adverse effects of thermal deformation of large guide vanes while ensuring that the guide vanes have sufficient rigidity and strength. Summary of the Invention

[0005] The purpose of this invention is to provide a large corner guide vane. By installing a fixed support assembly and a one-way sliding support assembly on the bottom and top surfaces of the guide vane body, respectively, it can not only ensure that the guide vane body has sufficient rigidity, but also effectively release the thermal deformation of the large guide vane structure in the height and length directions by utilizing the relative movement of each support. Furthermore, by using the elastic limiting mechanism in the assembly to limit the rigid displacement of the support in the constraint direction, while allowing the support to generate elastic relief displacement within a preset value range in any direction of the horizontal plane, it can also effectively release the thermal deformation of the connectors or supports connected to the guide vane body, reduce the structural stress of the guide vane body, and significantly enhance the safety of using the large guide vane.

[0006] This invention is achieved through the following technical solution:

[0007] A large corner guide vane includes a vane body. The bottom surface of the vane body is provided with a bottom surface fixed support assembly and a bottom surface one-way sliding support assembly. The top surface of the vane body is provided with a top surface fixed support assembly and a top surface one-way sliding support assembly. The bottom surface fixed support assembly includes a first bidirectional sliding pot-type rubber support and a first full-limiting mechanism. The first full-limiting mechanism is used to limit the rigid displacement of the first upper support plate of the first bidirectional sliding pot-type rubber support in the horizontal direction and allow the first upper support plate to generate a preset value in the horizontal direction. The bottom surface unidirectional sliding support assembly includes a second bidirectional sliding pot-type rubber support and a first directional limiting mechanism. The first directional limiting mechanism is used to limit the rigid displacement of the second upper support plate of the second bidirectional sliding pot-type rubber support in the first constraint direction, allow the second upper support plate to generate an elastic displacement within a preset value along the first constraint direction, and allow the second upper support plate to move along the first connecting line between the bottom surface fixed support assembly and the bottom surface unidirectional sliding support assembly. The top surface fixed support assembly includes a cylinder. The system comprises a guide sleeve, a cylindrical guide shaft seat, and a second full-limiting mechanism. The cylindrical guide sleeve has a guide hole, and the cylindrical guide shaft seat has a guide shaft that can move vertically within the guide hole. The second full-limiting mechanism limits the rigid displacement of the cylindrical guide sleeve relative to the wind tunnel top wall in the horizontal direction and allows the cylindrical guide sleeve to generate an elastic clearance displacement within a preset value in the horizontal direction. The top surface unidirectional sliding support assembly includes a sliding guide groove seat, a sliding guide plate seat, and a second directional limiting mechanism. The sliding guide groove seat has a guide groove, and the sliding guide plate seat has a guide plate that can move vertically within the guide groove along a second connecting line. The second directional limiting mechanism limits the rigid displacement of the sliding guide groove seat relative to the wind tunnel top wall in a second constraint direction and allows the sliding guide groove seat to generate an elastic clearance displacement within a preset value in the second constraint direction. The second connecting line is parallel to the first connecting line, the first constraint direction is perpendicular to the first connecting line, and the second constraint direction is perpendicular to the second connecting line.

[0008] In this technical solution, the main body of the guide vane is an integral structure, and its top and bottom surfaces are both arc-shaped, or more accurately, it is an airfoil with the curvature gradually increasing and then gradually decreasing.

[0009] A bottom surface fixed support assembly and a bottom surface one-way sliding support assembly are provided on the bottom surface of the guide vane body to serve as the main load-bearing components of the guide vane body. The bottom surface fixed support assembly does not undergo rigid movement, while the part of the bottom surface one-way sliding support assembly connected to the guide vane body can move along the first connecting line between the centers of the two support assemblies to release the thermal deformation of the guide vane body in the length direction.

[0010] Specifically, the bottom fixed support assembly includes a first bidirectional sliding pot-type rubber bearing and a first full-limiting mechanism. The bidirectional sliding pot-type rubber bearing is existing technology, and its upper support plate can move horizontally relative to the lower support plate. The first full-limiting mechanism restricts the rigid movement of the upper support plate of the first bidirectional sliding pot-type rubber bearing, ensuring sufficient stiffness for the bottom fixed support assembly when wind tunnel airflow loads act on the guide vane body. Simultaneously, the first full-limiting mechanism also allows the upper support plate to produce an elastic clearance displacement within a preset value, such as a few millimeters. This allows the guide vane body to move due to the elastic deformation of the connecting components when subjected to thermal expansion thrust, releasing the thermal deformation of the connecting components and reducing the structural stress on the guide vane body. In some preferred embodiments, the first full-limiting mechanism uses a disc spring assembly with appropriate preload to provide rigid movement limitation and elastic clearance displacement for the upper support plate.

[0011] The bottom unidirectional sliding support assembly includes a second bidirectional sliding pot-type rubber support and a first directional limiting mechanism. The bidirectional sliding pot-type rubber support used is structurally the same as that of the bottom fixed support assembly, the difference being the arrangement of the first directional limiting mechanism. To allow for the release of thermal deformation along the length of the guide vane body, the second upper support plate connected to the bottom of the guide vane body needs to move along the first connecting line. Therefore, the constraint direction of the first directional limiting mechanism on the second upper support plate is perpendicular to the direction of the first connecting line. In the constraint direction, the first directional limiting mechanism restricts the rigid movement of the second upper support plate, ensuring that the guide vane body has sufficient rigidity to bear lateral airflow loads. Simultaneously, the first directional limiting mechanism also allows the second upper support plate to generate elastic relief displacement in the constraint direction to release the thermal deformation of the connecting components.

[0012] A top surface fixed support assembly and a top surface one-way sliding support assembly are provided on the top surface of the guide vane body. In the horizontal direction, the top surface fixed support assembly will not undergo rigid movement, while the portion of the top surface one-way sliding support assembly connected to the guide vane body can move along the second connecting line between the centers of the two support assemblies. This, in conjunction with the two bottom support assemblies, effectively releases the thermal deformation of the guide vane body in the length direction while ensuring that the guide vane body has sufficient rigidity to bear the airflow load. In addition, in the vertical direction, the top surface fixed support assembly and the top surface one-way sliding assembly can also effectively release the thermal deformation of the guide vane body itself in the height direction.

[0013] Specifically, the top surface fixed support assembly includes a cylindrical guide sleeve, a cylindrical guide shaft, and a second full-limiting mechanism. The cylindrical guide sleeve has a guide hole, and the cylindrical guide shaft has a guide shaft. When the guide vane body undergoes thermal deformation in the height direction, the movement of the guide shaft within the guide hole can release the deformation. To cope with the thermal expansion thrust of the connecting components, the cylindrical guide sleeve can move relative to the top wall of the wind tunnel in any horizontal direction. The second full-limiting mechanism, similar to the first full-limiting mechanism, restricts the rigid displacement of the cylindrical guide sleeve in the horizontal direction, but simultaneously allows it to produce elastic clearance displacement within a preset value in any horizontal direction.

[0014] The top-surface unidirectional sliding support assembly includes a sliding guide groove seat, a sliding guide plate seat, and a second directional limiting mechanism. The guide plate of the sliding guide plate seat can move not only along the guide groove of the sliding guide groove seat in the direction of the second connecting line to release thermal deformation along the length of the guide vane body, but also along the guide groove in the vertical direction to release thermal deformation along the height of the guide vane body. Similarly, the sliding guide groove seat can also move in any horizontal direction relative to the wind tunnel top wall, and the second directional limiting mechanism restricts the second constraint direction of the sliding guide groove seat, making the second constraint direction perpendicular to the direction of the second connecting line. Thus, in the constraint direction, the second directional limiting mechanism can restrict the rigid movement of the sliding guide groove seat while allowing it to generate elastic relief displacement in the constraint direction to release thermal deformation of the connecting components.

[0015] In this technical solution, the parallel first and second connecting lines ensure that the four support components on the top and bottom surfaces of the guide vane body are in the same plane, guaranteeing the consistency of the guiding positions of the upper and lower parts of the guide vane body and the coordination of the deformation of the upper and lower parts of the guide vane body. This effectively releases the thermal deformation of the large guide vane itself in the height and length directions. At the same time, combined with the rigid limiting of the elastic limiting mechanism, the guide vane body has sufficient rigidity to guide the airflow when facing external airflow loads. When the connecting parts on the guide vane body undergo thermal expansion, the thermal deformation of the connecting parts is released through elastic displacement, reducing the structural stress of the guide vane body. This allows the guide vane bodies to be used in groups in wind tunnels to minimize the thermal deformation from the guide vane body and connecting parts, significantly enhancing the safety and reliability of large guide vanes.

[0016] In a preferred embodiment of the limiting mechanism for the bottom support assembly in this invention, the first elastic limiting member includes a seat body with a first countersunk hole. A guide rod and a first disc spring assembly sleeved on the guide rod are slidably disposed in the first countersunk hole. The first disc spring assembly is used to push the first bearing head against the upper support plate of the bidirectional sliding basin rubber support. A fourth nut is threaded to the tail of the guide rod. The fourth nut is used to adjust the first bearing head and the seat body to have a first gap.

[0017] In this technical solution, both the first full-limiting mechanism and the first directional limiting mechanism employ several first elastic limiting components. Each first elastic limiting component includes a base body fixed to the bottom wall of the wind tunnel, for example, by adjusting a shim plate to a mounting plate on the bottom wall. A countersunk hole is provided within the base body, through which a guide rod passes and can move. A first bearing head is connected to the head of the guide rod, and a first disc spring assembly fitted onto the neck of the guide rod can push the first bearing head against the upper support plate of the bidirectional sliding basin-type rubber support. An adjusting nut at the tail of the guide rod is used to adjust the preload of the first disc spring assembly, ensuring sufficient rigidity for the first elastic limiting component. Simultaneously, rotating the adjusting nut creates a first gap between the first bearing head and the base body, allowing for the release of thermal deformation of the connecting components through movement when subjected to thermal expansion thrust.

[0018] In some preferred embodiments, taking the wind tunnel operating temperature of 40~70 °C as an example, the displacement caused by the thermal expansion thrust of the connecting components is usually 1~3 mm. Therefore, the width of the first gap is set to 1~3 mm.

[0019] In this technical solution, the preload of the first disc spring assembly can be determined based on the maximum aerodynamic load and the maximum thermal expansion thrust during wind tunnel testing. Specifically, the preload needs to be greater than the maximum aerodynamic load to prevent the aerodynamic load from pushing the disc spring assembly during wind tunnel operation, thus maintaining the stability of the guide vane body. Simultaneously, the preload also needs to be less than the maximum thermal expansion thrust so that the continuously increasing internal stress in the connecting components due to temperature rise can compress the disc spring assembly by several millimeters to make room, and then reset it after the thermal expansion thrust is removed.

[0020] Furthermore, the first full-limiting mechanism includes four first elastic limiting members installed on the bottom wall of the wind tunnel, the four first elastic limiting members being evenly distributed around the circumference of the first bidirectional sliding pot-type rubber support; the first directional limiting mechanism includes two first elastic limiting members installed on the bottom wall of the wind tunnel, the two first elastic limiting members being arranged opposite each other along the first constraint direction.

[0021] The different constraint directions of the first full-limiting mechanism and the first directional limiting mechanism determine the different arrangements of the first elastic limiting members. The first full-limiting mechanism needs to constrain the rigid displacement of the upper support plate along any horizontal direction. Therefore, four first elastic limiting members are evenly distributed around the circumference of the first bidirectional sliding pot-type rubber support to abut against the four sides of the upper support plate, preventing rigid displacement of the upper support plate on the horizontal plane, while simultaneously providing a few millimeters of elastic clearance displacement to release the thermal expansion thrust of the connecting components. The first directional limiting mechanism needs to constrain the direction perpendicular to the first connecting line to ensure that the second upper support plate can move unimpeded along the direction of the first connecting line. Therefore, the two elastic limiting members of the first directional limiting mechanism are arranged opposite each other along the first constraint direction to abut against two opposite sides of the upper support plate, respectively.

[0022] In one or more embodiments, multiple first elastic limiting members may correspond to the same side of the upper support plate. However, based on factors such as cost, arrangement, stability, and debugging complexity, each side of the upper support plate corresponds to one first elastic limiting member.

[0023] As a preferred embodiment of the limiting mechanism for the top support assembly in this invention, the second full limiting mechanism and the second directional limiting mechanism include a plurality of second elastic limiting members. Each second elastic limiting member includes a block, on which at least two second countersunk holes are provided. A screw and a second disc spring assembly sleeved on the screw are slidably disposed in the second countersunk holes. A second bearing head is connected to the screw, and the second disc spring assembly is used to push the second bearing head against the cylindrical guide sleeve or the sliding guide groove. A fifth nut is threadedly connected to the tail of the screw, and the fifth nut is used to adjust the second bearing head and the block to have a second gap.

[0024] In this technical solution, both the second full-limiting mechanism and the second directional limiting mechanism employ several second elastic limiting components. The block of the second elastic limiting component is fixed to the top wall of the wind tunnel, for example, by adjusting a shim and fixing it to a mounting plate on the top wall. The block has at least two countersunk holes, each containing a slidably mounted screw. A second bearing head is connected to the head of the screw, and a second disc spring assembly fitted on the screw can push the second bearing head against a cylindrical guide sleeve or sliding guide groove to limit rigid displacement and allow elastic clearance displacement. An adjusting nut at the tail of the screw is used to adjust the preload of the second disc spring assembly, and rotating the adjusting nut can create a second gap between the second bearing head and the block. In some preferred embodiments, the second gap is equal to the first gap.

[0025] In this technical solution, the structure of the second elastic limiting member is basically the same as that of the first elastic limiting member. The difference lies in that the point of action of the second elastic limiting member is closer to the top wall of the wind tunnel. Therefore, the size of the second disc spring assembly cannot be set to be large, and a single small disc spring assembly is difficult to achieve sufficient preload. Therefore, multiple countersunk holes are provided in the block to utilize multiple second disc spring assemblies to achieve the desired preload. The first elastic limiting member acts on the upper support plate, away from the bottom wall of the wind tunnel, allowing sufficient space to install a larger disc spring assembly. Therefore, only one countersunk hole is needed in the seat of the first elastic limiting member. In some preferred embodiments, the block of the second elastic limiting member has 2 to 4 countersunk holes.

[0026] Furthermore, the second full-limiting mechanism includes four second elastic limiting members installed on the top wall of the wind tunnel, the four second elastic limiting members being evenly distributed around the circumference of the cylindrical guide sleeve; the second directional limiting mechanism includes two second elastic limiting members installed on the top wall of the wind tunnel, the two second elastic limiting members being arranged opposite each other along the second constraint direction.

[0027] The different constraint directions of the second full-limiting mechanism and the second directional limiting mechanism determine the different arrangements of the second elastic limiting members. The second full-limiting mechanism needs to constrain the rigid displacement of the cylindrical guide sleeve along any horizontal direction. Four second elastic limiting members are evenly distributed around the circumference of the cylindrical guide sleeve to abut against its four sides, preventing rigid displacement on the horizontal plane, while simultaneously providing a few millimeters of elastic clearance to release the thermal expansion thrust of the connecting components. The second directional limiting mechanism needs to restrict the movement of the sliding guide slot towards the second constraint direction. Therefore, two second elastic limiting members are arranged opposite each other along the second constraint direction to abut against two opposite sides of the sliding guide slot, respectively.

[0028] Furthermore, the cylindrical guide sleeve is provided with a first through hole and an eighth bolt. The eighth bolt passes through the first through hole and is threaded to the top wall of the wind tunnel. The diameter of the first through hole is 4-8 mm larger than the diameter of the eighth bolt. The sliding guide groove is provided with a second through hole and a tenth bolt. The tenth bolt passes through the second through hole and is threaded to the top wall of the wind tunnel. The diameter of the second through hole is 4-8 mm larger than the diameter of the tenth bolt.

[0029] In this technical solution, in order to enable the cylindrical guide sleeve to move in any horizontal direction on the top wall while maintaining a stable limit in the vertical direction, a first through hole is provided in the cylindrical guide sleeve, and an eighth bolt is used to pass through the first through hole and be threaded to the top wall of the wind tunnel. Then, the diameter difference between the eighth bolt and the first through hole is used to provide the distance of elastic clearance displacement. Combined with the second full limit mechanism, the rigid displacement is limited and elastic clearance displacement is allowed.

[0030] Similarly, the sliding guide slot can also move horizontally along the top wall. A second through hole is provided on the sliding guide slot, through which a tenth bolt with a smaller diameter passes and is threaded to the top wall of the wind tunnel to ensure a stable connection between the sliding guide slot and the top wall of the wind tunnel in the vertical direction. In the horizontal direction, a second directional limiting mechanism rigidly limits the sliding guide slot to ensure that the guide vane body has sufficient rigidity.

[0031] Furthermore, at least one bottom sliding support is provided on the bottom surface of the guide vane body, and the bottom sliding support includes a third bidirectional sliding basin rubber support.

[0032] In this technical solution, the third bidirectional sliding pot rubber bearing can also adopt the existing bidirectional sliding pot rubber bearing structure. The upper support plate of the bidirectional sliding pot rubber bearing is connected to the guide vane body, and the lower support plate is connected to the bottom wall, so that the upper support plate can move relative to the lower support plate in multiple directions on the horizontal plane.

[0033] In this technical solution, the bottom sliding support, in conjunction with the bottom fixed and unidirectional sliding support assembly, provides stable vertical support. In one or more embodiments, the number of bottom sliding supports can be one or more.

[0034] Furthermore, the center point of the bottom fixed support assembly and the center point of the bottom one-way sliding support assembly are located on the first middle arc line of the bottom surface of the guide vane body; the center point of the top fixed support assembly and the center point of the top one-way sliding support assembly are located on the second middle arc line of the top surface of the guide vane body.

[0035] In this technical solution, both the bottom and top surfaces of the guide vane body have virtual mid-arc lines. These mid-arc lines are smooth curves formed by connecting a series of normal midpoints, reflecting the curvature trend of the bottom and top contours of the guide vane body. The center points of the bottom fixed support assembly and the bottom one-way sliding support are located on the first mid-arc line of the arc-shaped structure on the bottom surface of the guide vane body. The center points of the top fixed support assembly and the top one-way sliding support assembly are located on the second mid-arc line of the arc-shaped structure on the top surface of the guide vane body. By placing the four main support points of the guide vane body on the mid-arc lines of the top and bottom surfaces, the rigidity of the guide vane body and the coordination of deformation along the length direction can be further improved, better promoting the release of thermal deformation in the length direction of the large guide vane body.

[0036] As a preferred arrangement of the fixed support assembly and the one-way sliding support assembly on the top and bottom surfaces in this invention, along the extension direction of the first middle arc, the length between the center point of the bottom fixed support assembly and the first end of the first middle arc is 1 / 5 to 2 / 5 of the length of the first middle arc, and the length between the center point of the bottom one-way sliding support assembly and the first end is 3 / 5 to 4 / 5 of the length of the first middle arc; along the extension direction of the second middle arc, the length between the center point of the top fixed support assembly and the second end of the second middle arc is 1 / 5 to 2 / 5 of the length of the second middle arc, and the length between the center point of the top one-way sliding support assembly and the second end is 3 / 5 to 4 / 5 of the length of the second middle arc.

[0037] When designing the positions of the four support points, the fixed support assembly and the one-way sliding support assembly on the same plane should be positioned at locations with greater curvature of the guide vane body to ensure greater stiffness within the rectangular area formed by the four support points to cope with larger aerodynamic loads. At the same time, the fixed support assembly and the one-way sliding support assembly on the same plane should also be positioned at the two ends with the smallest curvature of the guide vane body to achieve coordination of thermal deformation over a wider range on the guide vane body.

[0038] In this technical solution, the first end of the first arc is taken as the starting end. The arc length between the first end and the center point of the fixed support assembly is 1 / 5 to 2 / 5 of the total arc length of the first arc, and the arc length between the first end and the center point of the unidirectional sliding support assembly is 3 / 5 to 4 / 5 of the total arc length of the first arc. For example, assuming the total length of the first arc is L, the center point of the fixed support assembly is located in the range of 1 / 5L to 2 / 5L from the first end, and the center point of the unidirectional sliding support assembly is located in the range of 3 / 5L to 4 / 5L from the first end.

[0039] Similarly, taking the second segment of the second middle arc as the starting point, the arc length between it and the center point of the fixed support assembly is 1 / 5 to 2 / 5 of the total arc length of the second middle arc, and the arc length between it and the center point of the unidirectional sliding support assembly is 3 / 5 to 4 / 5 of the total arc length of the second middle arc.

[0040] By setting the positions of the four support points, the stiffness and thermal deformation coordination of the guide vane body can be effectively balanced by the cooperation of the fixed support assembly and the unidirectional sliding support assembly, thereby better coping with the high-frequency vibration and dynamic aerodynamic loads caused by high-speed airflow in the wind tunnel.

[0041] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0042] 1. The present invention provides four support points for connecting the guide vane body to the bottom and top walls of the wind tunnel by fixed support assemblies and one-way sliding support assemblies installed on the bottom and top surfaces of the guide vane body. This provides sufficient rigidity for the guide vane body to bear the high-speed airflow load. At the same time, the one-way sliding support assembly allows the guide vane body to release thermal deformation in the length direction along the first and second connecting lines, while the fixed support assembly and one-way sliding support assembly on the top surface can release thermal deformation in the height direction along the vertical direction. Thus, through the simple deployment of support assemblies, it is possible to ensure that the guide vane has sufficient rigidity while releasing the thermal deformation of the large guide vane structure itself in the height and length directions, which has broad application value.

[0043] 2. The present invention adopts an elastic limiting mechanism based on disc spring assembly, which enables the guide vane body to have sufficient rigidity to guide the airflow when facing external airflow load. When the connecting parts on the guide vane body undergo thermal expansion, the thermal deformation of the connecting parts is released by elastic displacement, reducing the structural stress of the guide vane body. This allows the guide vane bodies to be used in groups in wind tunnels to minimize the thermal deformation from the guide vane body and connecting parts, significantly enhancing the safety and reliability of large guide vanes.

[0044] 3. By setting the positions of the four support points, the present invention can effectively balance the stiffness and thermal deformation coordination of the guide vane body by using the cooperation of the fixed support assembly and the one-way sliding support assembly, thereby better coping with the high-frequency vibration and dynamic aerodynamic load caused by the high-speed airflow in the wind tunnel.

[0045] 4. The present invention adopts a design of smaller diameter bolts and larger diameter through holes, combined with the rigid limiting of the elastic limiting mechanism, which can ensure the stable connection between the large guide vane body and the top wall of the wind tunnel. At the same time, it can also elastically yield to release internal stress when the connecting parts apply thermal expansion thrust to the guide vane body.

[0046] 5. This invention designs different elastic limiting mechanisms based on the installation space of the wind tunnel's top and bottom walls to ensure that the elastic limiting mechanisms can generate sufficient preload.

[0047] 6. By setting a bottom sliding support, the present invention can work with the bottom fixed and unidirectional sliding support assembly to provide stable vertical support, especially to provide better support for both ends of the guide vane body, thereby further improving the safety of the guide vane body in use. Attached Figure Description

[0048] The accompanying drawings, which are included to provide a further understanding of embodiments of the invention and form part of this application, do not constitute a limitation thereof. In the drawings:

[0049] Figure 1This is a schematic diagram of the flow guide plate in a specific embodiment of the present invention;

[0050] Figure 2 This is a bottom view of the guide vane in a specific embodiment of the present invention;

[0051] Figure 3 This is a top view of the guide vane in a specific embodiment of the present invention;

[0052] Figure 4 This is a cross-sectional schematic diagram of the bottom surface fixing support assembly in a specific embodiment of the present invention;

[0053] Figure 5 This is a cross-sectional schematic diagram of the bottom unidirectional sliding support assembly in a specific embodiment of the present invention;

[0054] Figure 6 This is a schematic diagram of the structure of the first elastic limiting member in a specific embodiment of the present invention;

[0055] Figure 7 This is a cross-sectional schematic diagram of the top surface fixed support assembly in a specific embodiment of the present invention;

[0056] Figure 8 This is a cross-sectional schematic diagram of the top surface unidirectional sliding support assembly in a specific embodiment of the present invention;

[0057] Figure 9 This is a schematic diagram of the structure of the second elastic limiting member in a specific embodiment of the present invention;

[0058] Figure 10 This is a cross-sectional schematic diagram of the bottom sliding support in a specific embodiment of the present invention;

[0059] Figure 11 In a specific embodiment of the present invention, there are multiple guide vane bodies connected by connectors.

[0060] The attached diagram shows the markings and corresponding component names:

[0061] 1-Guide plate body, 2-Bottom surface fixed support assembly, 3-Bottom surface one-way sliding support assembly, 4-Bottom surface sliding support, 5-Top surface fixed support assembly, 6-Top surface one-way sliding support assembly;

[0062] 11-First connecting plate, 12-Second connecting plate, 13-Third connecting plate, 14-Fourth connecting plate, 15-Fifth connecting plate;

[0063] 21-First adjusting shim, 22-First bidirectional sliding pot-type rubber support, 23-First bolt, 231-First spring washer, 232-First flat washer, 24-First embedded steel plate, 25-First mounting plate, 26-Second adjusting shim, 27-Third adjusting shim, 28-Second bolt, 281-Second spring washer, 282-Second flat washer, 29-First nut;

[0064] 31-Fourth adjusting pad, 32-Second bidirectional sliding pot rubber support, 33-Second embedded steel plate, 34-Second mounting plate, 35-Fifth adjusting pad, 36-Sixth adjusting pad, 37-Third bolt, 371-Third spring washer, 372-Third flat washer, 38-Fourth bolt, 381-Fourth spring washer, 382-Fourth flat washer, 39-Second nut;

[0065] 41-Fifth adjusting pad, 42-Third bidirectional sliding pot rubber support, 43-Third embedded steel plate, 44-Third mounting plate, 45-Sixth adjusting pad, 46-Fifth bolt, 461-Fifth spring washer, 462-Fifth flat washer, 47-Sixth bolt, 471-Sixth spring washer, 472-Sixth flat washer, 48-Third nut;

[0066] 51-Seventh adjusting shim, 52-Cylindrical guide shaft seat, 53-Guide shaft, 54-Seventh bolt, 541-Seventh spring washer, 542-Seventh flat washer, 55-Cylindrical guide sleeve, 56-Guide hole, 57-Eighth bolt, 571-Eighth spring washer, 572-Eighth flat washer, 58-Eighth adjusting shim, 59-Ninth adjusting shim, 510-Fourth mounting plate, 511-Fourth embedded steel plate;

[0067] 61-Tenth Adjusting Shim, 62-Sliding Guide Plate Seat, 63-Guide Plate, 64-Ninth Bolt, 641-Ninth Spring Washer, 642-Ninth Flat Washer, 65-Sliding Guide Groove Seat, 66-Guide Groove, 67-Tenth Bolt, 671-Tenth Spring Washer, 672-Tenth Flat Washer, 68-Eleventh Adjusting Shim, 69-Twelfth Adjusting Shim, 610-Fifth Mounting Plate, 611-Fifth Embedded Steel Plate;

[0068] 71-Seat body, 72-First disc spring assembly, 73-Guide rod, 74-Baffle, 75-Fourth nut, 76-First clearance, 77-First fastener, 771-Eleventh spring washer, 772-Eleventh flat washer, 78-Base plate, 79-First pressure head;

[0069] 81-block, 82-screw, 83-fifth nut, 84-second disc spring assembly, 85-second bearing head, 86-second fastener, 861-twelfth spring washer, 862-twelfth flat washer, 87-second gap;

[0070] 9-First connecting line, 10-Second connecting line, 100-First guide vane body, 200-Second guide vane body, 300-Connector. Detailed Implementation

[0071] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the embodiments and accompanying drawings. The illustrative embodiments and descriptions of this invention are only for explaining this invention and are not intended to limit this invention.

[0072] In the description of this invention, it should be understood that the terms "front", "rear", "left", "right", "up", "down", "vertical", "horizontal", "high", "low", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the scope of protection of this invention.

[0073] Example 1:

[0074] like Figures 1 to 8 The large corner guide vane shown includes a guide vane body 1. The bottom surface of the guide vane body 1 is provided with a bottom surface fixed support assembly 2 and a bottom surface one-way sliding support assembly 3. The top surface of the guide vane body 1 is provided with a top surface fixed support assembly 5 and a top surface one-way sliding support assembly 6.

[0075] The bottom surface fixed support assembly 2 includes a first bidirectional sliding pot rubber support 22 and a first full limiting mechanism. The first full limiting mechanism is used to limit the rigid displacement of the first upper support plate of the first bidirectional sliding pot rubber support 22 in the horizontal direction and allow the first upper support plate to generate an elastic relief displacement within a preset value in the horizontal direction.

[0076] The bottom surface one-way sliding support assembly 3 includes a second bidirectional sliding pot-type rubber support 32 and a first directional limiting mechanism. The first directional limiting mechanism is used to limit the rigid displacement of the second upper support plate of the second bidirectional sliding pot-type rubber support 32 in the first constraint direction, allow the second upper support plate to generate an elastic relief displacement within a preset value along the first constraint direction, and allow the second upper support plate to move along the first connecting line 9 between the bottom surface fixed support assembly 2 and the bottom surface one-way sliding support assembly 3.

[0077] The top surface fixed support assembly 5 includes a cylindrical guide sleeve 55, a cylindrical guide shaft seat 52, and a second full-limiting mechanism. The cylindrical guide sleeve 55 is provided with a guide hole 56, and the cylindrical guide shaft seat 52 is provided with a guide shaft 53 that can move vertically within the guide hole 56. The second full-limiting mechanism is used to limit the rigid displacement of the cylindrical guide sleeve 55 relative to the wind tunnel top wall in the horizontal direction, and to allow the cylindrical guide sleeve 55 to generate an elastic clearance displacement within a preset value in the horizontal direction.

[0078] The top surface unidirectional sliding support assembly 6 includes a sliding guide groove seat 65, a sliding guide plate seat 62, and a second directional limiting mechanism. The sliding guide groove seat 65 is provided with a guide groove 66, and the sliding guide plate seat 62 is provided with a guide plate 63 that can move in the vertical direction and the second connecting line 10 within the guide groove 66. The second directional limiting mechanism is used to limit the rigid displacement of the sliding guide groove seat 65 relative to the top wall of the wind tunnel in the second constraint direction and allow the sliding guide groove seat 65 to generate an elastic clearance displacement within a preset value in the second constraint direction.

[0079] Wherein, the second connecting line 10 is parallel to the first connecting line 9, the first constraint direction is perpendicular to the first connecting line 9, and the second constraint direction is perpendicular to the second connecting line 10.

[0080] In some preferred embodiments, the preset value is 1~3 mm.

[0081] In some preferred embodiments, such as Figure 7 and Figure 8 As shown, the cylindrical guide sleeve 55 is provided with a first through hole and an eighth bolt 57. The eighth bolt 57 passes through the first through hole and is threaded to the top wall of the wind tunnel. The diameter of the first through hole is 4-8 mm larger than the diameter of the eighth bolt 57. The sliding guide groove seat 65 is provided with a second through hole and a tenth bolt 67. The tenth bolt 67 passes through the second through hole and is threaded to the top wall of the wind tunnel. The diameter of the second through hole is 4-8 mm larger than the diameter of the tenth bolt 67.

[0082] In some preferred embodiments, such as Figure 4As shown, a first adjusting pad 21 and a first connecting plate 11 are provided between the upper support plate of the first bidirectional sliding basin rubber support 22 of the bottom surface fixed support assembly 2 and the bottom surface of the guide vane body 1. The upper support plate is threaded to the bottom surface of the guide vane body 1 by a second bolt 28, a second spring washer 281, a second flat washer 282, and a first nut 29. A first embedded steel plate 24 is pre-embedded in the bottom wall of the wind tunnel. A first mounting plate 25 is welded to the first embedded steel plate 24. A second adjusting pad 26 is also provided between the first mounting plate 25 and the lower support plate of the first bidirectional sliding basin rubber support 22, and the two are threadedly connected by a first bolt 23, a first spring washer 231, and a first flat washer 232. A third adjusting pad 27 is also provided on the first mounting plate 25. A first elastic limiting member is threadedly connected to the third adjusting pad 27 by a first fastener 77, an eleventh spring washer 771, and an eleventh flat washer 772.

[0083] In some preferred embodiments, such as Figure 5 As shown, a fourth adjusting pad 31 and a second connecting plate 12 are provided between the upper support plate of the second bidirectional sliding basin rubber support 32 of the bottom unidirectional sliding support assembly 3 and the bottom surface of the guide vane body 1. The upper support plate is threaded to the bottom surface of the guide vane body 1 by a fourth bolt 38, a fourth spring washer 381, a fourth flat washer 382, ​​and a second nut 39. A second embedded steel plate 33 is pre-embedded in the bottom wall of the wind tunnel. A second mounting plate 34 is welded onto the second embedded steel plate 33. A fifth adjusting pad 35 is also provided between the second mounting plate 34 and the lower support plate of the second bidirectional sliding basin rubber support 32, and the two are threadedly connected by a third bolt 37, a third spring washer 371, and a third flat washer 372. A sixth adjusting plate 36 is also provided on the second mounting plate 34. The first elastic limiting member is also fixed on the sixth adjusting pad 36 by a first fastener 77, an eleventh spring washer 771, and an eleventh flat washer 772.

[0084] In some preferred embodiments, such as Figure 7As shown, a fourth connecting plate 14 is provided on the top surface of the guide vane body 1. A seventh adjusting shim 51 for mounting a cylindrical guide shaft seat 52 is provided on the fourth connecting plate 14. The cylindrical guide shaft seat 52 is threaded to the top surface of the guide vane body 1 by a seventh bolt 54, a seventh spring washer 541, and a seventh flat washer 542. A fourth embedded steel plate 511 is pre-embedded in the top wall of the wind tunnel. A fourth mounting plate 510 is welded to the fourth embedded steel plate 511. A ninth adjusting shim 59 is provided on the fourth mounting plate 510. A cylindrical guide sleeve 55 is installed on the ninth adjusting shim 59. An eighth bolt 57, an eighth spring washer 571, and an eighth flat washer 572 pass through the first through hole on the cylindrical guide sleeve 55 and are threaded to the screw holes on the fourth mounting plate 510 and the ninth adjusting shim 59. The fourth mounting plate 510 is also provided with an eighth adjusting pad 58, on which a second elastic limiting member is connected by a second fastener 86, a twelfth spring washer 861, and a twelfth flat washer 862.

[0085] In some preferred embodiments, such as Figure 8 As shown, a fifth connecting plate 15 is provided on the top surface of the guide vane body 1. A tenth adjusting shim 61 is provided on the fifth connecting plate 15. A sliding guide seat plate 62 is threadedly connected to the tenth adjusting shim 61 by a ninth bolt 64, a ninth spring washer 641, and a ninth flat washer 642. A fifth embedded steel plate 611 is pre-embedded in the top wall of the wind tunnel. A fifth mounting plate 610 is welded to the fifth embedded steel plate 611. A twelfth adjusting shim 69 is provided on the fifth mounting plate 610. A sliding guide groove seat 65 is installed on the twelfth adjusting shim 69. A tenth bolt 67, a tenth spring washer 671, and a tenth flat washer 672 pass through the second through hole on the sliding guide groove seat 65 and are threadedly connected to the screw holes on the fifth mounting plate 610 and the twelfth adjusting shim 69. The fifth mounting plate 610 is also provided with an eleventh adjusting pad 68, which is also connected to a second elastic limiting member through a second fastener 86, a twelfth spring washer 861, and a twelfth flat washer 862.

[0086] Example 2:

[0087] Based on Example 1, such as Figures 4 to 6 As shown, the first full-limiting mechanism and the first directional limiting mechanism include a plurality of first elastic limiting components. Each first elastic limiting component includes a seat 71. The seat 71 is provided with a first countersunk hole. A guide rod 73 is slidably disposed in the first countersunk hole, and a first disc spring assembly 72 sleeved on the guide rod 73. The first disc spring assembly 72 is used to push the first pressure head 79 to abut against the upper support plate of the bidirectional sliding basin rubber support. The tail of the guide rod 73 is threadedly connected to a fourth nut 75. The fourth nut 75 is used to adjust the first pressure head 79 and the seat 71 to have a first gap.

[0088] like Figures 7 to 9 As shown, the second full-limiting mechanism and the second directional limiting mechanism include several second elastic limiting components. Each second elastic limiting component includes a block 81 with at least two second countersunk holes. A screw 82 and a second disc spring assembly 84 sleeved on the screw 82 are slidably disposed in the second countersunk holes. A second pressure head 85 is connected to the screw 82. The second disc spring assembly 84 is used to push the second pressure head 85 against the cylindrical guide sleeve 55 or the sliding guide groove seat 65. A fifth nut 83 is threadedly connected to the tail of the screw 82. The fifth nut 83 is used to adjust the second gap between the second pressure head 85 and the block 81.

[0089] In some preferred embodiments, the first full-limiting mechanism includes four first elastic limiting members installed on the bottom wall of the wind tunnel, the four first elastic limiting members being evenly distributed around the first bidirectional sliding pot-type rubber support 22 in the circumference; the first directional limiting mechanism includes two first elastic limiting members installed on the bottom wall of the wind tunnel, the two first elastic limiting members being arranged opposite to each other along the first constraint direction.

[0090] In some preferred embodiments, the second full-limiting mechanism includes four second elastic limiting members installed on the top wall of the wind tunnel, the four second elastic limiting members being evenly distributed around the circumference of the cylindrical guide sleeve 55; the second directional limiting mechanism includes two second elastic limiting members installed on the top wall of the wind tunnel, the two second elastic limiting members being arranged opposite each other along the second constraint direction.

[0091] Example 3:

[0092] Based on the above embodiments, the center point of the bottom surface fixed support assembly 2 and the center point of the bottom surface one-way sliding support assembly 3 are located on the first middle arc line of the bottom surface of the guide vane body 1; the center point of the top surface fixed support assembly 5 and the center point of the top surface one-way sliding support assembly 6 are located on the second middle arc line of the top surface of the guide vane body 1.

[0093] In some preferred embodiments, along the extension direction of the first middle arc, the length between the center point of the bottom surface fixed support assembly 2 and the first end of the first middle arc is 1 / 5 to 2 / 5 of the length of the first middle arc, and the length between the center point of the bottom surface one-way sliding support assembly 3 and the first end is 3 / 5 to 4 / 5 of the length of the first middle arc; along the extension direction of the second middle arc, the length between the center point of the top surface fixed support assembly 5 and the second end of the second middle arc is 1 / 5 to 2 / 5 of the length of the second middle arc, and the length between the center point of the top surface one-way sliding support assembly 6 and the second end is 3 / 5 to 4 / 5 of the length of the second middle arc.

[0094] Example 4:

[0095] Based on the above embodiments, such as Figure 10 As shown, at least one bottom sliding support 4 is also provided on the bottom surface of the guide vane body 1, and the bottom sliding support 4 includes a third bidirectional sliding basin rubber support 42.

[0096] In some preferred embodiments, a third embedded steel plate 43 is pre-embedded in the bottom wall of the wind tunnel. A third mounting plate 44 is welded onto the third embedded steel plate 43. A sixth adjusting shim 45 is provided on the third mounting plate 44, which is used to connect the lower support plate of the third bidirectional sliding pot-type rubber support 42. The lower support plate is threadedly connected to the third mounting plate 44 by a fifth bolt 46, a fifth spring washer 461, and a fifth flat washer 462. A fifth adjusting shim 41 and a third connecting plate 13 are provided between the upper support plate of the third bidirectional sliding pot-type rubber support 42 and the bottom surface of the guide vane body 1. The two are connected and fixed by a sixth bolt 47, a sixth spring washer 471, a sixth flat washer 472, and a third nut 48.

[0097] In some preferred embodiments, a bottom sliding support is provided at each end near the two ends of the first arc to improve the vertical support of the end of the guide vane body.

[0098] In some preferred embodiments, in order to better support the guide vane body, the center point of the bottom sliding support is located on the first mid-arc line of the bottom surface of the guide vane body.

[0099] Example 5:

[0100] Based on the above embodiments, such as Figure 11 As shown, when multiple guide vane bodies are used in combination, two guide vane bodies are connected by a connector 300. For the guide vane body itself, four support points provide sufficient rigidity to withstand high-speed airflow loads, while the guide vane body can release thermal deformation along its length and height. Regarding the thermal expansion thrust acting on the guide vane body due to the thermal deformation of the connector 300, the first guide vane body 100 can minimize the impact of the thermal deformation of the connector 300 on the guide vane body through the elastic displacement of the elastic limiting mechanism, significantly enhancing the safety and reliability of large guide vanes.

[0101] The terms "first," "second," etc., used in this invention (e.g., first connecting plate, second connecting plate, first bidirectional sliding pot rubber support, second bidirectional sliding pot rubber support, etc.) are merely for clarity of description and are not intended to limit any order or emphasize importance. Furthermore, the term "connection" used in this invention, unless otherwise specified, can refer to a direct connection or an indirect connection via other components.

[0102] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of the present invention. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A large corner guide vane, characterized in that, The system includes a guide vane body (1), the bottom surface of which is provided with a bottom surface fixed support assembly (2) and a bottom surface one-way sliding support assembly (3), and the top surface of the guide vane body (1) is provided with a top surface fixed support assembly (5) and a top surface one-way sliding support assembly (6). The bottom surface fixed support assembly (2) includes a first bidirectional sliding pot rubber support (22) and a first full limiting mechanism. The first full limiting mechanism is used to limit the rigid displacement of the first upper support plate of the first bidirectional sliding pot rubber support (22) in the horizontal direction and allow the first upper support plate to generate an elastic relief displacement within a preset value in the horizontal direction. The bottom surface one-way sliding support assembly (3) includes a second bidirectional sliding pot rubber support (32) and a first directional limiting mechanism. The first directional limiting mechanism is used to limit the rigid displacement of the second upper support plate of the second bidirectional sliding pot rubber support (32) in the first constraint direction, allow the second upper support plate to generate an elastic relief displacement within a preset value along the first constraint direction, and allow the second upper support plate to move along the first connecting line (9) between the bottom surface fixed support assembly (2) and the bottom surface one-way sliding support assembly (3). The top surface fixed support assembly (5) includes a cylindrical guide sleeve (55), a cylindrical guide shaft seat (52), and a second full-limiting mechanism. The cylindrical guide sleeve (55) is provided with a guide hole (56), and the cylindrical guide shaft seat (52) is provided with a guide shaft (53) that can move vertically within the guide hole (56). The second full-limiting mechanism is used to limit the rigid displacement of the cylindrical guide sleeve (55) relative to the top wall of the wind tunnel in the horizontal direction and allow the cylindrical guide sleeve (55) to generate an elastic clearance displacement within a preset value in the horizontal direction. The top surface one-way sliding support assembly (6) includes a sliding guide groove seat (65), a sliding guide plate seat (62), and a second directional limiting mechanism. The sliding guide groove seat (65) is provided with a guide groove (66), and the sliding guide plate seat (62) is provided with a guide plate (63) that can move in the vertical direction and the second connecting line (10) within the guide groove (66). The second directional limiting mechanism is used to limit the rigid displacement of the sliding guide groove seat (65) relative to the top wall of the wind tunnel in the second constraint direction and allow the sliding guide groove seat (65) to generate an elastic clearance displacement within a preset value in the second constraint direction. Wherein, the second connecting line (10) is parallel to the first connecting line (9), the first constraint direction is perpendicular to the first connecting line (9), and the second constraint direction is perpendicular to the second connecting line (10).

2. A large corner guide vane according to claim 1, characterized in that, The first full-limiting mechanism and the first directional limiting mechanism include a plurality of first elastic limiting components. The first elastic limiting component includes a seat (71). The seat (71) is provided with a first countersunk hole. A guide rod (73) and a first disc spring assembly (72) sleeved on the guide rod (73) are slidably arranged in the first countersunk hole. The first disc spring assembly (72) is used to push the first bearing head (79) to abut against the upper support plate of the bidirectional sliding basin rubber support. The tail of the guide rod (73) is threaded with a fourth nut (75). The fourth nut (75) is used to adjust the first bearing head (79) and the seat (71) to have a first gap.

3. A large corner guide vane according to claim 2, characterized in that, The first full-limiting mechanism includes four first elastic limiting members installed on the bottom wall of the wind tunnel. The four first elastic limiting members are evenly distributed around the first bidirectional sliding pot-type rubber support (22) in the circumference. The first directional limiting mechanism includes two first elastic limiting members installed on the bottom wall of the wind tunnel. The two first elastic limiting members are arranged opposite to each other along the first constraint direction.

4. A large corner guide vane according to claim 1, characterized in that, The second full-limiting mechanism and the second directional limiting mechanism include several second elastic limiting components. The second elastic limiting component includes a block (81). The block (81) is provided with at least two second countersunk holes. A screw (82) and a second disc spring assembly (84) sleeved on the screw (82) are slidably disposed in the second countersunk holes. A second bearing head (85) is connected to the screw (82). The second disc spring assembly (84) is used to push the second bearing head (85) to abut against the cylindrical guide sleeve (55) or the sliding guide groove seat (65). A fifth nut (83) is threadedly connected to the tail of the screw (82). The fifth nut (83) is used to adjust the second bearing head (85) and the block (81) to have a second gap.

5. A large corner guide vane according to claim 4, characterized in that, The second full-limiting mechanism includes four second elastic limiting members installed on the top wall of the wind tunnel, the four second elastic limiting members being evenly distributed around the cylindrical guide sleeve (55) in the circumference; the second directional limiting mechanism includes two second elastic limiting members installed on the top wall of the wind tunnel, the two second elastic limiting members being arranged opposite each other along the second constraint direction.

6. A large corner guide vane according to claim 1, characterized in that, The preset value is 1~3 mm.

7. A large corner guide vane according to claim 1, characterized in that, The cylindrical guide sleeve (55) is provided with a first through hole and an eighth bolt (57). The eighth bolt (57) passes through the first through hole and is threaded to the top wall of the wind tunnel. The diameter of the first through hole is 4-8 mm larger than the diameter of the eighth bolt (57). The sliding guide groove seat (65) is provided with a second through hole and a tenth bolt (67). The tenth bolt (67) passes through the second through hole and is threaded to the top wall of the wind tunnel. The diameter of the second through hole is 4-8 mm larger than the diameter of the tenth bolt (67).

8. A large corner guide vane according to claim 1, characterized in that, At least one bottom sliding support (4) is also provided on the bottom surface of the guide vane body (1), and the bottom sliding support (4) includes a third bidirectional sliding basin rubber support (42).

9. A large corner guide vane according to any one of claims 1 to 8, characterized in that, The center point of the bottom fixed support assembly (2) and the center point of the bottom one-way sliding support assembly (3) are located on the first middle arc line of the bottom surface of the guide vane body (1); the center point of the top fixed support assembly (5) and the center point of the top one-way sliding support assembly (6) are located on the second middle arc line of the top surface of the guide vane body (1).

10. A large corner guide vane according to claim 9, characterized in that, Along the extension direction of the first middle arc, the length between the center point of the bottom fixed support assembly (2) and the first end of the first middle arc is 1 / 5 to 2 / 5 of the length of the first middle arc, and the length between the center point of the bottom one-way sliding support assembly (3) and the first end is 3 / 5 to 4 / 5 of the length of the first middle arc. Along the extension direction of the second middle arc, the length between the center point of the top surface fixed support assembly (5) and the second end of the second middle arc is 1 / 5 to 2 / 5 of the length of the second middle arc, and the length between the center point of the top surface unidirectional sliding support assembly (6) and the second end is 3 / 5 to 4 / 5 of the length of the second middle arc.

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