A device and method for installing noise reduction guide vanes in a water tunnel.

Abstract

This application provides a device and method for installing noise-reducing guide vanes in water tunnels. The device includes an assembly platform, a guide vane structure, a noise-reducing component, multiple sets of clamping structures, and a locking mechanism. The guide vane structure is fixed to the assembly platform. The noise-reducing component is installed on the guide vane structure. Multiple sets of clamping structures are spaced parallel to each other along the length of the noise-reducing component and clamped to its top surface. One end of each clamping structure is rotatably connected to one side of the assembly platform, and the other end is adjustablely clamped to the other side of the assembly platform via the locking mechanism, thus securing the noise-reducing component to the guide vane structure. This device and method significantly improve the bonding rate and strength between the noise-reducing layer and the guide vane, and effectively enhance the stability of the noise-reducing layer in aquatic environments.

Description

Technical Field

[0001] This application relates to the field of fluid mechanics, and in particular to a device and method for installing a noise reduction guide vane in a water tunnel. Background Technology

[0002] The water tunnel is an important experimental device for hydraulic research. It consists of several parts, including a test section, a diffusion section, a corner section, a stabilization section, a contraction section, and an axial flow pump. During the experiment, when the water flows into the corner, centrifugal force causes the water to detach from the inner and outer walls of the tunnel, forming a separation zone. Additionally, the water flows through the corner due to the viscosity of the tunnel walls, generating secondary flow that causes uneven flow and increased energy loss. Furthermore, noise in the test section is a crucial indicator for evaluating the flow field. The main noise source is the axial flow pump. Noise reduction measures include active noise reduction, such as designing the compressor to operate at a lower speed to minimize tip velocity; and passive noise reduction, such as using sound-absorbing baffles at the corners of the friction loop to eliminate the impact of compressor noise on the test section.

[0003] Therefore, it is essential to design a reasonably structured guide vane to improve the uniformity of the flow field at the corner exit, reduce water tunnel noise, and minimize energy loss. Summary of the Invention

[0004] One of the purposes of this application is to provide a water tunnel noise reduction guide plate installation device and a water tunnel noise reduction guide plate installation method to solve the problem of poor performance of existing water tunnel guide plates.

[0005] The technical solution of this application is:

[0006] A water tunnel noise reduction guide plate installation device includes an assembly platform, a guide plate structure, a noise reduction component, multiple sets of clamping structures, and a locking mechanism. The guide plate structure is fixed on the assembly platform. The noise reduction component is installed on the guide plate structure. Multiple sets of clamping structures are parallel and spaced along the length direction of the noise reduction component, clamping it against the top surface of the noise reduction component. One end of each set of clamping structures is rotatably connected to one side of the assembly platform, and the other end is locked and adjustablely clamped to the other side of the assembly platform through the locking mechanism, for locking the noise reduction component onto the guide plate structure.

[0007] As one technical solution of this application, the assembly platform includes a platform base plate, on which a plurality of arc-shaped plates are arranged parallel and spaced apart along the length direction; the arc-shaped plates cooperate with the guide vane structure, and a plurality of reinforcing ribs are installed on opposite sides of each arc-shaped plate, and the plurality of reinforcing ribs are installed parallel and spaced apart on the platform base plate.

[0008] As one technical solution of this application, the guide plate structure includes an arc-shaped guide plate made of thick-walled stainless steel. The top and bottom surfaces of the arc-shaped guide plate are provided with dovetail grooves for engaging the noise reduction component. The dovetail grooves are jointly formed by the arc-shaped guide plate, the arc-shaped limiting plate, and the arc-shaped cover plate. The arc-shaped limiting plate is detachably installed at the end of the side wall of the arc-shaped guide plate, and the arc-shaped cover plate is fixed at the middle of the side wall of the arc-shaped guide plate. The arc-shaped limiting plate and the arc-shaped cover plate are on the same plane.

[0009] As one technical solution of this application, the noise reduction component includes a first arc-shaped noise reduction layer and two second arc-shaped noise reduction layers; the first arc-shaped noise reduction layer is installed on the top and bottom surfaces of the middle part of the flow guide structure; each group of second arc-shaped noise reduction layers is snapped onto the top and bottom surfaces of both ends of the flow guide structure.

[0010] As one technical solution of this application, the first arc-shaped noise reduction layer includes two first arc-shaped noise reduction plates; one of the first arc-shaped noise reduction plates matches the top surface of the middle part of the flow guide plate structure and is fastened to the top surface of the middle part of the flow guide plate structure by a plurality of countersunk screws; the other first arc-shaped noise reduction plate matches the bottom surface of the middle part of the flow guide plate structure and is fastened to the bottom surface of the middle part of the flow guide plate structure by a plurality of countersunk screws.

[0011] As a technical solution of this application, each group of second arc-shaped noise reduction layers includes two second arc-shaped noise reduction plates; one of the second arc-shaped noise reduction plates matches the top surface of the end of the flow guide plate structure and is fastened to the top surface of the end of the flow guide plate structure by a plurality of countersunk screws; the other second arc-shaped noise reduction plate matches the bottom surface of the end of the flow guide plate structure and is fastened to the bottom surface of the end of the flow guide plate structure by a plurality of countersunk screws.

[0012] As a technical solution of this application, each of the pressing structures includes an arc-shaped pressure plate and a connecting shaft; one end of the connecting shaft is connected to one side of the assembly platform; the arc-shaped pressure plate matches the noise reduction component and presses against the top surface of the noise reduction component; one end of the arc-shaped pressure plate is rotatably connected to the other end of the connecting shaft, and the other end is locked and adjustablely pressed against the other side of the assembly platform through the locking mechanism, for locking the noise reduction component onto the guide plate structure.

[0013] As one technical solution of this application, the locking mechanism includes a connecting base plate, a first top plate, a second top plate, a third top plate, multiple first vertical plates, multiple second vertical plates, a clamping screw, a clamping crossbar, a locking wrench, a U-shaped connecting frame, two ear plates, two connecting plates, two first rotating shafts, two second rotating shafts, two third rotating shafts, and a fourth rotating shaft; the connecting base plate is welded to the other side of the assembly platform, the multiple first vertical plates are vertically fixed to the connecting base plate, and the first top plate is fixed to the multiple first vertical plates; the second top plate and the third top plate are arranged parallel and spaced apart and are on the same plane, and are both directly above the connecting base plate; the second top plate is welded to the other end of the clamping structure and is pressed against the first top plate; the multiple second vertical plates are vertically fixed to the connecting base plate, and the third top plate is fixed to the multiple second vertical plates; the two ear plates are vertically fixed parallel and spaced apart to the connecting base plate. The third top plate; the clamping screw is vertically mounted on the second top plate with adjustable height, and a nut is fitted on the top and a limiting nut is fitted in the middle; one end of the clamping crossbar is fitted on the clamping screw and clamped to the limiting nut; the locking wrench is fixed on the top of the middle connecting rod of the U-shaped connecting frame; the two connecting plates are arranged parallel and spaced apart and located below the middle connecting rod of the U-shaped connecting frame; the two ends of each first rotating shaft are rotatably connected to one end of the corresponding connecting plate and one end of the side plate of the U-shaped connecting frame; the two ends of the second rotating shaft pass through the opposite sides of the clamping crossbar and are rotatably mounted on the two connecting plates; the two ends of the third rotating shaft pass through the opposite sides of the other end of the clamping crossbar and are drive-connected to the top of the two ear plates; the two ends of the fourth rotating shaft are drive-connected to the other end of the corresponding ear plate and the side plate of the U-shaped connecting frame.

[0014] A method for installing a noise-reducing guide vane in a water tunnel, comprising the aforementioned water tunnel noise-reducing guide vane installation device, includes the following steps:

[0015] S1. According to the design requirements, a thick stainless steel plate is processed into a guide vane arc structure using a press and mold. The pressed arc guide vane is then processed by a CNC machine tool into the arc structure dimensions, dovetail groove and first countersunk hole required by the design.

[0016] S2, according to the structural dimensions of the arc-shaped guide vane, process and assemble the arc-shaped plate of the assembly platform and the arc-shaped pressure plate in the pressing structure, so that the arc-shaped plate and the arc-shaped pressure plate are respectively matched with the arc surface of the arc-shaped guide vane, and assemble the platform base plate, reinforcing rib plate, arc-shaped plate and arc-shaped pressure plate in the assembly platform;

[0017] S3, based on the cross-sectional dimensions of the dovetail groove of the arc-shaped guide vane, process the first arc-shaped noise reduction layer, the second arc-shaped noise reduction layer, and the second countersunk hole in the noise reduction assembly;

[0018] S4. After adjusting the assembly platform to the qualified position, open the arc-shaped pressure plate and place the machined arc-shaped guide vane on the arc plate; use a feeler gauge to measure the gap between the arc-shaped guide vane and the arc plate to check whether the machining accuracy of the arc-shaped guide vane meets the design requirements;

[0019] S5, apply adhesive to the inner wall of the dovetail groove on the top and bottom surfaces of the arc-shaped guide plate, and move the first arc-shaped noise reduction plate in the first arc-shaped noise reduction layer from the dovetail groove on one end of the arc-shaped guide plate to the dovetail groove in the middle of the arc-shaped guide plate.

[0020] S6, after the first arc-shaped noise reduction layer is pushed to the set position and aligned with the first countersunk hole and the second countersunk hole, the arc-shaped pressure plate located in the middle of the arc-shaped guide plate is flipped, and the locking wrench in the locking mechanism is pulled to fix the first arc-shaped noise reduction layer and the arc-shaped guide plate to prevent displacement;

[0021] S7, install countersunk screws in the first countersunk hole and the second countersunk hole sequentially from the middle of the arc-shaped guide plate towards both ends;

[0022] S8. After the adhesive has completely solidified, install the arc-shaped guide plate into the water tunnel body and weld the arc-shaped guide plate to the inner wall of the water tunnel body.

[0023] S9, apply adhesive to the inner wall of the dovetail grooves at both ends of the arc-shaped guide plate, and quickly place the corresponding second arc-shaped noise reduction layer into the dovetail groove and fit it against the arc-shaped guide plate. After aligning the first countersunk hole and the second countersunk hole, install the countersunk screws in the first countersunk hole and the second countersunk hole sequentially from the middle of the arc-shaped guide plate towards both ends; install the arc-shaped limiting plates at both ends of the arc-shaped guide plate. Beneficial effects of this application:

[0024] In this application, the water tunnel noise reduction guide plate installation device and method utilize a solid, thick-walled stainless steel arc-shaped structure for the arc-shaped guide plate. This solves the problems of low strength and inability to install noise reduction layers in traditional guide plate airfoil structures, effectively improving the overall stability of the guide plate assembly. Simultaneously, the arc-shaped guide plate and noise reduction components are fixed together via dovetail grooves, resolving the issue of cracking under long-term aquatic conditions caused by traditional rubber bonding between the noise reduction layer and guide plate. This results in a stronger bond between the arc-shaped guide plate and the noise reduction components, enhanced overall integrity, and improved performance. Furthermore, the positioning of the noise reduction components on the top and bottom surfaces of the arc-shaped guide plate employs a self-locking mechanism, addressing the problems of low opening and closing efficiency and insufficient locking force, improving construction efficiency, and preventing displacement of the noise reduction layer. Moreover, detachable arc-shaped limiting plates at both ends of the arc-shaped guide plate solve the problem of heat generation and potential damage to the noise reduction layer during welding of the upper and lower ends of the guide plate structure to the tunnel body, facilitating the installation of the noise reduction layers at both ends after welding. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the corner of a water tunnel provided in an embodiment of this application;

[0027] Figure 2 for Figure 1 Enlarged diagram of point A in the diagram;

[0028] Figure 3 This is a schematic diagram of the water tunnel noise reduction guide plate installation device provided in the embodiments of this application;

[0029] Figure 4 This is a first-angle schematic diagram of the water tunnel noise reduction guide plate installation device provided in the embodiments of this application;

[0030] Figure 5 This is a second-angle schematic diagram of the water tunnel noise reduction guide plate installation device provided in the embodiments of this application;

[0031] Figure 6 This is a schematic diagram of the flow guide structure and noise reduction component assembly provided in the embodiments of this application;

[0032] Figure 7 This is a schematic diagram of the first angle of assembly of the flow guide structure and noise reduction component provided in the embodiments of this application;

[0033] Figure 8 This is a schematic diagram of the guide vane structure provided in an embodiment of this application;

[0034] Figure 9 This is a schematic diagram of the guide vane structure at a first angle provided in an embodiment of this application;

[0035] Figure 10 for Figure 3 Enlarged diagram of point B in the diagram;

[0036] Figure 11 This is a schematic diagram of the locking mechanism at a first angle provided in an embodiment of this application;

[0037] Figure 12 This is a schematic diagram of the second angle of the locking mechanism provided in an embodiment of this application;

[0038] Figure 13 This is a third-angle schematic diagram of the locking mechanism provided in an embodiment of this application.

[0039] Icons: 1-Water tunnel; 2-Platform base plate; 3-Arc-shaped plate; 4-Reinforcing rib plate; 5-Arc-shaped guide vane; 6-Dovetail groove; 7-Arc-shaped limiting plate; 8-First arc-shaped noise reduction plate; 9-Counterhead screw; 10-Second arc-shaped noise reduction plate; 11-Arc-shaped pressure plate; 12-Connecting shaft; 13-Connecting base plate; 14-First top plate; 15-Second top plate; 16-Third top plate; 17-First vertical plate; 18-Second vertical plate; 19-Pressure screw; 20-Pressure crossbar; 21-Locking wrench; 22-U-shaped connecting frame; 23-Ear plate; 24-Connecting plate; 25-First rotating shaft; 26-Second rotating shaft; 27-Third rotating shaft; 28-Fourth rotating shaft; 29-Arc-shaped cover plate. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] In the description of this application, it should be noted that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is usually placed when in use. They are only used to facilitate the description of this application and to simplify 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 limitations on this application.

[0044] Furthermore, in this application, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Moreover, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0045] Furthermore, terms such as "horizontal" and "vertical" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," not that the structure must be completely horizontal, but can be slightly tilted.

[0046] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0047] Example:

[0048] Please refer to Figure 1 (Refer to) Figures 2 to 13This application provides a water tunnel noise reduction guide vane installation device, which mainly includes an assembly platform, a guide vane structure, a noise reduction component, multiple sets of clamping structures, and a locking mechanism. The guide vane structure is installed on the assembly platform; simultaneously, the noise reduction component is installed on the guide vane structure. Furthermore, multiple sets of clamping structures are parallel and spaced along the length of the noise reduction component, clamping it against the top surface of the noise reduction component. One end of each clamping structure is rotatably connected to one side of the assembly platform, and the other end is adjustablely clamped to the other side of the assembly platform via the locking mechanism, used to lock the noise reduction component onto the guide vane structure. This device is convenient and easy to operate during construction, and offers higher assembly precision.

[0049] Furthermore, the assembly platform includes a platform base plate 2, on which multiple arc-shaped plates 3 are arranged parallel and spaced along the length direction. Each arc-shaped plate 3 is vertically fixed to the platform base plate 2. Simultaneously, the dimensions and curvature of the arc-shaped plates 3 are matched with the guide vane structure, and multiple reinforcing ribs 4 are vertically installed on opposite sides of each arc-shaped plate 3. These reinforcing ribs 4 are also vertically fixed to the platform base plate 2 in parallel and spaced order. The arc-shaped plates 3 serve two purposes: firstly, they can act as test templates to check whether the curvature of the arc-shaped guide vane 5 meets the standards; secondly, they can assist in the rapid installation of the noise reduction components and ensure that the curvature after installation meets design requirements.

[0050] Furthermore, the guide vane structure includes an arc-shaped guide vane 5, with dovetail grooves 6 on both its top and bottom surfaces for engaging the noise reduction component. The dovetail groove 6 is composed of the arc-shaped guide vane 5, an arc-shaped limiting plate 7, and an arc-shaped cover plate 29. The arc-shaped limiting plate 7 is detachably installed at the end of the side wall of the arc-shaped guide vane 5, and the arc-shaped cover plate 29 is fixed at the middle of the side wall of the arc-shaped guide vane 5, with the limiting plate 7 and cover plate 29 on the same plane. The arc-shaped guide vane 5 uses a solid, thick-walled stainless steel structure, solving the problems of insufficient strength in traditional airfoil structures and the inconvenience of installing the noise reduction layer. The noise reduction layer mounting groove of the arc-shaped guide vane 5 is machined into a dovetail groove 6, making it less prone to detachment under water flow impact loads. Countersunk threads are machined around the perimeter and center where the arc-shaped guide vane 5 and the noise reduction component fit together, and countersunk screws 9 are used for auxiliary reinforcement to make the connection between the two more stable.

[0051] Furthermore, the noise reduction component includes a first arc-shaped noise reduction layer and two second arc-shaped noise reduction layers; wherein, the first arc-shaped noise reduction layer is installed on the top and bottom surfaces of the middle part of the guide vane structure; each second arc-shaped noise reduction layer is snapped onto the top and bottom surfaces at both ends of the guide vane structure. Specifically, the first arc-shaped noise reduction layer includes two first arc-shaped noise reduction plates 8; one of the first arc-shaped noise reduction plates 8 matches the dovetail groove 6 on the top surface of the middle part of the arc-shaped guide vane 5 and is snapped into the dovetail groove 6 on the top surface of the middle part of the guide vane structure by multiple countersunk screws 9; the other first arc-shaped noise reduction plate 8 matches the dovetail groove 6 on the bottom surface of the middle part of the arc-shaped guide vane 5 and is snapped into the dovetail groove 6 on the bottom surface of the middle part of the arc-shaped guide vane 5 by multiple countersunk screws 9. Furthermore, each set of second arc-shaped noise reduction layers includes two second arc-shaped noise reduction plates 10; one of the second arc-shaped noise reduction plates 10 matches the dovetail groove 6 on the top surface of the end of the arc-shaped guide vane 5 and is secured in the dovetail groove 6 on the top surface of the end of the guide vane structure by multiple countersunk screws 9; the other second arc-shaped noise reduction plate 10 matches the dovetail groove 6 on the bottom surface of the end of the arc-shaped guide vane 5 and is secured in the dovetail groove 6 on the bottom surface of the end of the arc-shaped guide vane 5 by multiple countersunk screws 9.

[0052] It should be noted that multiple rows of first countersunk holes are formed on the arc-shaped guide plate 5, and second countersunk holes matching the first countersunk holes are formed on the first arc-shaped noise reduction plate 8 and the second arc-shaped noise reduction plate 10. Threads are machined in the first countersunk holes. By installing countersunk screws 9 in the first countersunk holes and the corresponding second countersunk holes, the first arc-shaped noise reduction plate 8 and the second arc-shaped noise reduction plate 10 can be fixed on the arc-shaped guide plate 5 respectively.

[0053] Meanwhile, each clamping structure includes an arc-shaped pressure plate 11 and a connecting shaft 12; one end of the connecting shaft 12 is connected to one end of the arc-shaped plate 3; the arc-shaped pressure plate 11 matches the first arc-shaped noise reduction plate 8 and the second arc-shaped noise reduction plate 10, respectively pressing against the top surface of the corresponding first arc-shaped noise reduction plate 8 and second arc-shaped noise reduction plate 10; furthermore, one end of the arc-shaped pressure plate 11 is rotatably connected to the other end of the connecting shaft 12, and the other end is locked and adjustablely pressed against the other end of the arc-shaped plate 3 through a locking mechanism, used to lock the first arc-shaped noise reduction plate 8 and the second arc-shaped noise reduction plate 10 onto the arc-shaped guide plate 5 respectively. The arc-shaped pressure plate 11 can prevent misalignment during the installation of the noise reduction components, and at the same time can achieve quick locking and unlocking, improving installation efficiency. Since the heat generated during the welding of the guide vane to the tunnel body can easily damage the noise reduction layer, arc-shaped limiting plates 7 are designed at both ends of the arc-shaped guide vane 5. This allows the noise reduction components at both ends to be temporarily not installed during welding. After welding is completed, the noise reduction components and the arc-shaped limiting plates 7 are installed in sequence, which can effectively solve the problem of burn-out.

[0054] In addition, the locking mechanism includes a connecting base plate 13, a first top plate 14, a second top plate 15, a third top plate 16, multiple first vertical plates 17, multiple second vertical plates 18, a clamping screw 19, a clamping crossbar 20, a locking wrench 21, a U-shaped connecting frame 22, two ear plates 23, two connecting plates 24, two first rotating shafts 25, two second rotating shafts 26, a third rotating shaft 27, and a fourth rotating shaft 28; wherein, the connecting base plate 13 is welded to the other end of the arc-shaped plate 3, and the multiple first vertical plates... 17 is vertically welded to the connecting base plate 13; the first top plate 14 is welded to multiple first vertical plates 17; the second top plate 15 and the third top plate 16 are arranged in parallel intervals and on the same plane, and are both directly above the connecting base plate 13; the second top plate 15 is welded to the other end of the arc-shaped pressure plate 11 and is pressed tightly against the first top plate 14; multiple second vertical plates 18 are vertically welded to the connecting base plate 13; the third top plate 16 is welded to multiple second vertical plates 18; two ear plates 23 Parallel and spaced vertically welded to the third top plate 16; the clamping screw 19 is vertically mounted on the second top plate 15 with adjustable height, and is fitted with a nut at the top and a limiting nut in the middle; one end of the clamping crossbar 20 is fitted onto the clamping screw 19 and clamped to the limiting nut; the locking wrench 21 is fixed to the top of the middle connecting rod of the U-shaped connecting frame 22; two connecting plates 24 are arranged parallel and spaced apart and located below the middle connecting rod of the U-shaped connecting frame 22; the two ends of each first rotating shaft 25 are... The first shaft 26 is rotatably connected to one end of the corresponding connecting plate 24 and one end of the side plate of the U-shaped connecting frame 22; the second shaft 26 has its two ends extending through the opposite sides of the clamping crossbar 20 and is rotatably connected to the two connecting plates 24; the third shaft 27 has its two ends extending through the opposite sides of the other end of the clamping crossbar 20 and is drive-connected to the top of the two ear plates 23; the fourth shaft 28 has its two ends drive-connected to the other ends of the corresponding ear plates 23 and the side plates of the U-shaped connecting frame 22. The clamping screw 19 has an adjustment function, which can change its clamping force on the arc plate 3 by adjusting the length of the clamping screw 19. The locking wrench 21 can rotate 90 degrees, and its structure is simple and easy to operate.

[0055] The working principle of this locking mechanism is as follows:

[0056] Close the arc-shaped pressure plate 11 to ensure that the first top plate 14 and the second top plate 15 are in contact. Flip the clamping crossbar 20 and the clamping screw 19 so that the clamping screw 19 is placed on the second top plate 15. Flip the locking wrench 21 and the U-shaped connecting frame 22 to the vertical position. The clamping crossbar 20 generates a vertical downward clamping force under the action of the connecting plate 24. Under the combined action of the second rotating shaft 26 and the third rotating shaft 27, a lever principle is formed to achieve self-locking. When using it for the first time, adjust the length of the clamping screw 19 in the locked state to ensure that the clamping force generated by the clamping meets the usage requirements of the first arc-shaped noise reduction plate 8 and the second arc-shaped noise reduction plate 10. When opening, flip the locking wrench 21 with force. Under the action of the force, the U-shaped connecting frame 22 flips along the fourth rotating shaft 28. At the same time, under the action of the connecting plate 24, the clamping crossbar 20 and the clamping screw 19 are driven to flip synchronously, thus realizing the opening and closing state of the arc-shaped pressure plate 11 and completing the rapid switching of multiple arc-shaped guide vanes 5.

[0057] Furthermore, this embodiment also provides a method for installing a water tunnel noise reduction guide plate, including a water tunnel noise reduction guide plate installation device, comprising the following steps:

[0058] S1. According to the design requirements, a thicker stainless steel plate is processed into a guide vane arc structure using a press and mold. The pressed arc guide vane 5 is then processed by a CNC machine tool into the arc structure dimensions, dovetail groove 6, and first countersunk hole required by the design.

[0059] S2, according to the structural dimensions of the arc-shaped guide vane 5, process and assemble the arc-shaped plate 3 of the assembly platform and the arc-shaped pressure plate 11 in the pressing structure, so that the arc-shaped plate 3 and the arc-shaped pressure plate 11 are respectively matched with the arc surface of the arc-shaped guide vane 5, and assemble the platform base plate 2, reinforcing rib plate 4, arc-shaped plate 3 and arc-shaped pressure plate 11 in the assembly platform.

[0060] S3, based on the cross-sectional dimensions of the dovetail groove 6 of the arc-shaped guide vane 5, process the first arc-shaped noise reduction layer, the second arc-shaped noise reduction layer, and the second countersunk hole in the noise reduction assembly;

[0061] S4. After adjusting the assembly platform to the qualified position, open the arc-shaped pressure plate 11 and place the machined qualified arc-shaped guide vane 5 on the arc plate 3. Use a feeler gauge to measure the gap between the arc-shaped guide vane 5 and the arc plate 3 to check whether the machining accuracy of the arc-shaped guide vane 5 meets the design requirements.

[0062] S5, apply adhesive to the inner wall of the dovetail groove 6 on the top and bottom surfaces of the arc-shaped guide plate 5, and move the first arc-shaped noise reduction plate 8 in the first arc-shaped noise reduction layer from the dovetail groove 6 at one end of the arc-shaped guide plate 5 to the dovetail groove 6 in the middle of the arc-shaped guide plate 5.

[0063] S6. After the first arc-shaped noise reduction layer is pushed to the set position and aligned with the first and second countersunk holes, the arc-shaped pressure plate 11 located in the middle of the arc-shaped guide plate 5 is flipped over, and the locking wrench 21 in the locking mechanism is pulled to fix the first arc-shaped noise reduction layer and the arc-shaped guide plate 5 to prevent displacement.

[0064] S7, install countersunk screws 9 in the first and second countersunk holes sequentially from the middle of the arc-shaped guide plate 5 towards both ends;

[0065] S8. After the adhesive has completely solidified, install the arc-shaped guide plate 5 into the water tunnel 1 and weld the arc-shaped guide plate 5 to the inner wall of the water tunnel 1.

[0066] S9, apply adhesive to the inner wall of the dovetail groove 6 at both ends of the arc-shaped guide plate 5, and quickly place the corresponding second arc-shaped noise reduction layer in the dovetail groove 6 and fit it against the arc-shaped guide plate 5. After aligning the first countersunk hole and the second countersunk hole, install the countersunk screws 9 in the first countersunk hole and the second countersunk hole in sequence from the middle of the arc-shaped guide plate 5 towards both ends; install the arc-shaped limiting plates 7 at both ends of the arc-shaped guide plate 5.

[0067] In summary, the water tunnel noise reduction guide plate installation device and method of this application utilize a solid, thick-walled stainless steel arc-shaped structure for the arc-shaped guide plate 5. This solves the problems of low strength and inability to install noise reduction layers in traditional guide plate airfoil structures, effectively improving the overall stability of the guide plate assembly. Furthermore, the arc-shaped guide plate 5 is fixed to the noise reduction component via a dovetail groove 6, resolving the issue of cracking under long-term aquatic conditions caused by traditional methods that rely solely on rubber bonding. This results in a stronger bond between the arc-shaped guide plate 5 and the noise reduction component, enhancing overall integrity and performance. Additionally, the self-locking mechanism for positioning the noise reduction component on the top and bottom surfaces of the arc-shaped guide plate 5 solves the problems of low opening and closing efficiency and insufficient locking force, improving construction efficiency and preventing displacement of the noise reduction layer. Furthermore, the two ends of the arc-shaped guide vane 5 are equipped with detachable arc-shaped limiting plates 7, which solves the problem of heat generation and easy damage to the noise reduction layer when the upper and lower ends of the guide vane structure are welded to the cavity, and facilitates the installation of the noise reduction layer at both ends after welding.

[0068] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A device for installing a noise-reducing spoiler in a water tunnel, characterized in that The assembly platform, the guide vane structure, the noise reduction assembly, the plurality of compression structures and the locking mechanism; the guide vane structure is fixed on the assembly platform; the noise reduction assembly is installed on the guide vane structure; a plurality of the compression structures are compressed on the top surface of the noise reduction assembly in the length direction of the noise reduction assembly, and one end of each compression structure is rotatably connected to one side of the assembly platform, and the other end is adjustably compressed on the other side of the assembly platform through the locking mechanism, for locking the noise reduction assembly on the guide vane structure; the guide vane structure comprises an arc-shaped guide vane made of thick-walled stainless steel, and dovetail grooves for clamping the noise reduction assembly are formed on the top and bottom surfaces of the arc-shaped guide vane, and the dovetail grooves are jointly formed by the arc-shaped guide vane, an arc-shaped limiting plate and an arc-shaped cover plate; the arc-shaped limiting plate is detachably installed at the end of the side wall of the arc-shaped guide vane, and the arc-shaped cover plate is fixed at the middle of the side wall of the arc-shaped guide vane, and the arc-shaped limiting plate and the arc-shaped cover plate are in the same plane.

2. The water tunnel noise reduction strake mounting device of claim 1, wherein, The assembly platform comprises a platform bottom plate, and a plurality of arc-shaped plates are arranged on the platform bottom plate in parallel and at intervals in the length direction; the arc-shaped plates cooperate with the guide vane structure, and a plurality of reinforcing rib plates are installed on opposite sides of each arc-shaped plate; a plurality of reinforcing rib plates are installed on the platform bottom plate in parallel and at intervals.

3. The water tunnel noise reduction strake mounting device of claim 1, wherein, The noise reduction assembly comprises a first arc-shaped noise reduction layer and two second arc-shaped noise reduction layers; the first arc-shaped noise reduction layer is installed on the top and bottom surfaces of the middle part of the guide vane structure; each second arc-shaped noise reduction layer is clamped on the top and bottom surfaces of the two ends of the guide vane structure.

4. The water tunnel noise reduction strake mounting device of claim 3, wherein, The first arc-shaped noise reduction layer comprises two first arc-shaped noise reduction plates; one of the first arc-shaped noise reduction plates matches the top surface of the middle part of the guide vane structure and is clamped on the top surface of the middle part of the guide vane structure through a plurality of countersunk screws; the other first arc-shaped noise reduction plate matches the bottom surface of the middle part of the guide vane structure and is clamped on the bottom surface of the middle part of the guide vane structure through a plurality of countersunk screws.

5. The water tunnel noise reduction strake mounting device of claim 3, wherein, Each second arc-shaped noise reduction layer comprises two second arc-shaped noise reduction plates; one of the second arc-shaped noise reduction plates matches the top surface of the end part of the guide vane structure and is clamped on the top surface of the end part of the guide vane structure through a plurality of countersunk screws; the other second arc-shaped noise reduction plate matches the bottom surface of the end part of the guide vane structure and is clamped on the bottom surface of the end part of the guide vane structure through a plurality of countersunk screws.

6. The water tunnel noise reduction strake mounting device of claim 1, wherein, Each compression structure comprises an arc-shaped pressing plate and a connecting shaft; one end of the connecting shaft is connected to one side of the assembly platform; the arc-shaped pressing plate matches the noise reduction assembly and is compressed on the top surface of the noise reduction assembly; one end of the arc-shaped pressing plate is rotatably connected to the other end of the connecting shaft, and the other end is adjustably compressed on the other side of the assembly platform through the locking mechanism, for locking the noise reduction assembly on the guide vane structure.

7. The device of claim 1, wherein, The locking mechanism comprises a connecting bottom plate, a first top plate, a second top plate, a third top plate, a plurality of first vertical plates, a plurality of second vertical plates, a pressing screw rod, a pressing cross rod, a locking wrench, a U-shaped connecting frame, two ear plates, two connecting plates, a first rotating shaft, a second rotating shaft, a third rotating shaft and a fourth rotating shaft; the connecting bottom plate is welded on the other side of the assembly platform, a plurality of the first vertical plates are fixed vertically on the connecting bottom plate, and the first top plate is fixed on the first vertical plates; the second top plate and the third top plate are arranged in parallel and spaced apart and are on the same plane and directly above the connecting bottom plate; the second top plate is welded on the other end of the pressing structure and is tightly pressed on the first top plate; a plurality of the second vertical plates are fixed vertically on the connecting bottom plate, and the third top plate is fixed on the second vertical plates; two ear plates are fixed vertically and spaced apart on the third top plate; the pressing screw rod is vertically arranged on the second top plate in a height-adjustable manner, and a screw cap is sleeved on the top and a limiting nut is sleeved on the middle; one end of the pressing cross rod is sleeved on the pressing screw rod and is tightly pressed on the limiting nut; the locking wrench is fixed on the top of the middle connecting rod of the U-shaped connecting frame; two connecting plates are arranged in parallel and spaced apart and below the middle connecting rod of the U-shaped connecting frame; the two ends of each first rotating shaft are rotatably connected to one end of the corresponding connecting plate and one end of the side plate of the U-shaped connecting frame; the two ends of the second rotating shaft pass through the opposite sides of the pressing cross rod and are rotatably connected to the two connecting plates; the two ends of the third rotating shaft pass through the opposite sides of the other end of the pressing cross rod and are drivingly connected to the tops of the two ear plates; the two ends of the fourth rotating shaft are drivingly connected to the corresponding ear plates and the other end of the side plate of the U-shaped connecting frame.

8. A method for installing a water tunnel noise-reducing fairing, comprising the water tunnel noise-reducing fairing installation apparatus according to any one of claims 1 to 7, characterized in that, The method comprises the following steps: S1, according to the design requirements, a thicker stainless steel plate is processed into a guide vane arc surface structure by a press and a die, and the finished arc-shaped guide vane is processed into the required arc surface structure size, dovetail groove and first counterbore by a numerical control machine tool; S2, according to the structure size of the arc-shaped guide vane, an arc-shaped plate of an assembly platform and an arc-shaped pressing plate in a pressing structure are processed, so that the arc-shaped plate and the arc-shaped pressing plate are matched with the arc surface of the arc-shaped guide vane respectively, and a platform bottom plate, a reinforcing rib plate, the arc-shaped plate and the arc-shaped pressing plate in the assembly platform are assembled; S3, according to the cross-sectional size of the dovetail groove of the arc-shaped guide vane, a first arc-shaped noise reduction layer, a second arc-shaped noise reduction layer and a second counterbore in the noise reduction assembly are processed; S4, after adjusting the assembly platform to a qualified position, the arc-shaped pressing plate is opened, and the machined arc-shaped guide vane is placed on the arc-shaped plate; The gap between the arc-shaped guide vane and the arc-shaped plate is measured by a feeler gauge to check whether the machining precision of the arc-shaped guide vane meets the design requirements; S5, brush adhesive on the inner wall of the dovetail groove on the top and bottom surface of the arc-shaped flow guide piece, and translate the first arc-shaped noise reduction plate in the first arc-shaped noise reduction layer from the dovetail groove on one end of the arc-shaped flow guide piece into the dovetail groove in the middle of the arc-shaped flow guide piece; S6, when the first arc-shaped noise reduction layer is translated to a set position and aligned with the first counterbore and the second counterbore, flip the arc-shaped pressing plate at the middle position of the arc-shaped flow guide piece, and turn the locking wrench in the locking mechanism to fix the first arc-shaped noise reduction layer and the arc-shaped flow guide piece to prevent displacement; S7, install the countersunk screws in the first counterbore and the second counterbore in sequence from the middle of the arc-shaped flow guide piece to both ends; S8, after the adhesive is completely solidified, install the arc-shaped flow guide piece into the water tunnel body, and weld the arc-shaped flow guide piece to the inner wall of the water tunnel body; S9, brush adhesive on the inner wall of the dovetail groove at both ends of the arc-shaped flow guide piece, quickly put the corresponding second arc-shaped noise reduction layer into the dovetail groove and fit the arc-shaped flow guide piece, align the first counterbore and the second counterbore, and install the countersunk screws in the first counterbore and the second counterbore in sequence from the middle of the arc-shaped flow guide piece to both ends; Install the arc-shaped limiting plates at both ends of the arc-shaped flow guide piece.

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