Boltless fixing structure of wind deflector of large hydro-generator unit

Abstract

The utility model relates to motor technical field, aims at solving the problem of installation misplacement, easy loosening and inconvenient maintenance of the wind baffle bolt fixing mode in prior art, provides a kind of large-sized hydroelectric generating set wind baffle boltless fixing structure, including upper rack support arm;The bottom surface of upper rack support arm is welded with coaxial support rod connection outer ring and support rod connection inner ring;Several spliced wind baffles are hung and connected to the lower side of support rod connection outer ring and support rod connection inner ring;Fixed support is buckled between adjacent wind baffles;The side of adjacent wind baffle close to fixed support is hung and buckled in the two sides of fixed support respectively and forms locking cavity, and the inside of locking cavity is equipped with the adjusting wedge of locking adjacent wind baffle.The beneficial effects of the utility model are that wind baffle can be reliably fixed without bolt, bolt loosening risk is completely avoided, installation misplacement is avoided, installation process is simplified, maintenance efficiency is improved and original ventilation cooling effect of unit is not affected.

Description

Technical Field

[0001] This utility model relates to the field of motor technology, and more specifically, to a boltless fixing structure for the wind deflector of a large hydro-generator set. Background Technology

[0002] Large hydro-turbine generators are the core power equipment of hydropower projects. The efficient operation of their ventilation and cooling systems directly determines the power generation efficiency and safe lifespan of the unit. As a key component of the system, the wind deflector is mainly located above the generator rotor. By optimizing the airflow path, it reduces air leakage and turbulence of the cooling air, ensuring that the cooling air accurately covers the upper end of the stator bars, the stator core, and other core heat-generating areas. This is crucial for enhancing heat dissipation and preventing components from aging due to overheating.

[0003] However, the bolt fixing method used in the existing wind deflectors has significant safety hazards and maintenance problems: On the one hand, the continuous vibration and centrifugal force generated by the high-speed rotation of the rotor can easily cause the fixing bolts to fatigue, loosen or even fall off. Even with the help of locking plates and pressure plates to prevent loosening, the hidden danger cannot be completely eliminated. Once the loose bolts fall into the air gap between the stator and rotor, it will cause the stator and rotor to collide and rub against each other and the unit to shut down urgently, resulting in significant economic losses. On the other hand, traditional wind deflectors are mostly of a segmented structure. When inspecting the magnetic poles and wire bars, the bolts need to be removed piece by piece. The process is cumbersome and time-consuming, and bolts are also prone to being lost, creating new equipment safety risks.

[0004] Furthermore, the traditional installation process suffers from poor adaptability. The wind deflector is large and thin, making it prone to deformation during transportation and installation. Bolt fixing requires precise drilling of bolt holes, which can easily become misaligned after deformation. This leads to repeated adjustments or even on-site repairs during installation, which not only prolongs the installation cycle but may also damage the structural strength of the wind deflector due to forced assembly, affecting its wind-blocking effect and service life. Therefore, the industry urgently needs a new wind deflector fixing technology that can avoid bolt-related problems and simplify the disassembly and installation process to meet the needs of high reliability and high maintenance efficiency of the unit. Utility Model Content

[0005] The present invention aims to provide a boltless structure for fixing the wind deflector of a large hydro-generator set, so as to solve the problems of installation misalignment, easy loosening and inconvenient maintenance of the existing wind deflector bolt fixing method.

[0006] The embodiments of this utility model are implemented as follows: This utility model embodiment provides a boltless wind deflector structure for a large hydro-generator set, which includes an upper frame support arm; The bottom surface of the upper frame support arm is fixedly connected with a support rod connecting outer ring and a support rod connecting inner ring. The support rod connecting inner ring is located inside the support rod connecting outer ring and they are coaxial with each other. Several spliced ​​wind deflectors are suspended on the side of the aforementioned support rod connecting outer ring and inner ring away from the aforementioned upper frame support arm; A fixed bracket is provided between each of the adjacent wind deflectors, and the fixed bracket is suspended and connected to the outer ring of the support rod connection and the inner ring of the support rod connection. The adjacent wind deflectors are respectively hooked onto the two sides of the fixed bracket to form a locking cavity. The locking cavity is provided with an adjusting wedge to lock the adjacent wind deflectors.

[0007] In use, in the boltless fixing device for the wind deflector of a large hydro-generator, the outer ring and inner ring of the support rod are first fixedly connected to the upper frame support arm to build a stable support frame. The fixed bracket is connected to the frame, and after being assembled with the wind deflector, it forms the locking cavity. The wind deflector is initially positioned by adapting to the fixed bracket. Then, the adjusting wedge is embedded in the locking cavity, and the wedge-shaped structure of the adjusting wedge generates a clamping force. The wind deflector and the fixed bracket can be reliably fixed without bolts, which avoids the risk of loosening of traditional bolts, simplifies the disassembly and assembly process of the wind deflector, and ensures that the ventilation and cooling effect of the unit is not affected.

[0008] This embodiment discloses a boltless fixing structure for the wind deflector of a large hydro-generator unit. First, a stable support frame is built by fixing the outer ring of the support rod to the inner ring of the support rod via the upper frame support arm. Then, the frame connects to the fixing bracket, allowing the wind deflector to cooperate with the fixing bracket to form the locking cavity. Finally, the adjusting wedge is inserted into the locking cavity, and boltless fixing is achieved through wedge compression. This not only fundamentally avoids the hidden dangers of traditional bolt fixing, such as easy loosening and potential unit accidents, but also eliminates the need for disassembling and installing a large number of bolts when disassembling and assembling the wind deflector in sections. This design significantly improves maintenance efficiency. Furthermore, it eliminates the need for drilling screw holes in the aforementioned wind deflectors and fixed supports, preventing installation misalignment caused by wind deflector deformation. The overall structure does not alter the original ventilation path, ensuring continuous ventilation and cooling of the unit. This significantly enhances the reliability and practicality of the wind deflector fixing, resulting in a boltless wind deflector fixing structure for large hydro-generator units that reliably fixes the wind deflectors without bolts, completely avoids the risk of bolt loosening, prevents installation misalignment, simplifies the installation process, improves maintenance efficiency, and does not affect the original ventilation and cooling effect of the unit.

[0009] Optionally, the outer ring connecting the support rod and the inner ring connecting the support rod are spaced apart from each other.

[0010] This configuration provides independent and suitable connection points for the suspension and installation of several wind deflectors within the frame structure formed by the connection of the outer and inner rings of the support rods to the upper frame support arm. This avoids interference between the outer and inner rings of the support rods during installation and under stress, ensuring the stability and reliability of the connection of the wind deflectors. Furthermore, by optimizing the internal space layout of the frame through reasonable spacing, it provides favorable conditions for the subsequent assembly of the wind deflectors and the smooth operation of the ventilation circuit inside the unit, further improving the structural adaptability and operational stability of the entire boltless fixing device.

[0011] Optionally: Both sides of several of the above-mentioned wind deflectors have G-shaped flanges, and both sides of the above-mentioned fixed brackets have C-shaped mounting grooves. The G-shaped flanges of adjacent wind deflectors are respectively hooked into the C-shaped mounting grooves on both sides of the fixed brackets, and the locking cavity is located in the space where the G-shaped flanges and the C-shaped mounting grooves are engaged.

[0012] This design achieves several advantages. Firstly, the engagement of the G-shaped flange with the C-shaped mounting groove enables rapid pre-positioning of the wind deflector, significantly simplifying the assembly process. Simultaneously, the snap-fit ​​structure naturally restricts the vertical displacement of the wind deflector, enhancing initial stability. Secondly, the locking cavity is positioned within the snap-fit ​​space, allowing the adjusting wedge to precisely act on the contact area between the wind deflector and the fixed bracket, ensuring efficient transmission of the wedge-shaped locking force. Furthermore, adjacent wind deflectors are connected via grooves on both sides of the same fixed bracket, effectively reducing air leakage and balancing structural stability with ventilation and sealing, further enhancing the overall performance of the device.

[0013] Optionally: The adjusting wedge has a first wedge and a second wedge symmetrically distributed between each other. A first inner wedge and a second inner wedge are adapted between the first wedge and the second wedge. An adjusting screw is axially connected to the first inner wedge and the second inner wedge. One end of the adjusting screw is rotatably connected to the end of the second inner wedge near the first inner wedge. The other end of the adjusting screw passes through the first inner wedge and is threadedly connected to the first inner wedge. The first inner wedge and the second inner wedge are wedge-shaped structures that are proportionally matched. The first wedge and the second wedge are wedge-shaped structures that are proportionally matched. The first inner wedge and the second inner wedge are adapted to the wedge-shaped surfaces of the first wedge and the second wedge, respectively.

[0014] With this configuration, the rotation of the adjusting screw drives the relative movement of the first and second inner wedges, allowing for precise transmission of compressive force via the wedge-shaped surface. This ensures that the first and second wedges are tightly fitted to the fixed bracket and the baffle plate, respectively, achieving stable locking. Furthermore, the symmetrical structure and matching wedge design guarantee uniform force distribution during adjustment, preventing localized stress concentration that could lead to component deformation. It also simplifies adjustment operations, improves locking reliability and device lifespan, and further ensures the stability of the boltless fixing method.

[0015] Optionally: The other end of the adjusting screw has a hexagonal head, and the outer end of the hexagonal head is provided with an adjusting rod locking plate for limiting the rotation of the adjusting screw. The adjusting rod locking plate has a matching hexagonal hole at one end near the hexagonal head, and a hole at the other end away from the hexagonal head. A fixing bolt is fitted in the hole, and the fixing bolt passes through the hole and is threaded to the end of the fixing bracket.

[0016] With this configuration, when the adjusting screw reaches the preset torque, the adjusting rod locking plate is connected to the fixing bracket via the fixing bolt to prevent the adjusting screw from loosening.

[0017] Optionally: the first wedge is fitted with the C-shaped mounting groove wall of the fixed bracket, and the second wedge is fitted with the inner wall of the G-shaped flange of the wind deflector.

[0018] With this configuration, adjusting the adjusting screw can increase the distance between the first wedge and the second wedge, thereby making the first wedge contact the inner surface of the C-shaped mounting groove of the fixed bracket, and the second wedge contact the inner wall of the G-shaped flange of the wind deflector, which facilitates limiting the up-and-down movement of the wind deflector.

[0019] Optionally: One end of the aforementioned fixed bracket has a fixed baffle, and the aforementioned fixed bolt passes through the aforementioned hole and is threaded onto the aforementioned fixed baffle.

[0020] This design provides a dedicated and stable connection carrier for the fixing bolts, preventing the structural strength from being weakened by opening holes in the main body of the fixing bracket. It also allows the fixing baffle to precisely limit the installation position of the fixing bolts, ensuring that the locking plate of the adjusting rod and the hexagonal head of the adjusting screw are precisely matched, quickly achieving the anti-rotation fixing of the adjusting screw. This balances structural reliability and ease of operation, further enhancing the stability of the anti-loosening fixing of the adjusting screw.

[0021] Optionally, a first support rod and a second support rod are welded to the top edge of the fixed bracket. The first support rod and the second support rod are parallel to each other and spaced apart. The ends of the first support rod and the second support rod away from the fixed bracket are respectively welded to the bottom surfaces of the outer ring and the inner ring of the support rod connection.

[0022] This design provides stable two-point support for the fixed bracket through the parallel-spaced first and second support rods, ensuring balanced force distribution and precise installation. The welded connection enhances structural rigidity, preventing loosening. Furthermore, the first and second support rods are connected to the outer and inner rings of the support rod connection, respectively, creating a stable connection between the fixed bracket and the overall frame. This further ensures the positional stability and operational reliability of the windbreak after installation, without affecting the internal ventilation space.

[0023] Optionally, a rotor yoke, magnetic poles, stator cores and stator frames are sequentially sleeved on the bottom of several of the above-mentioned wind baffles, and the several of the above-mentioned wind baffles are suspended above the rotor yoke and the magnetic poles.

[0024] This configuration ensures that the baffle plate is precisely aligned with the core components of the unit through the sleeve structure, guaranteeing full coverage of the rotor yoke and magnetic poles, effectively reducing air leakage and turbulence in critical areas. Furthermore, the suspension connection prevents direct contact between the baffle plate and rotating components, ensuring safe unit operation. The precise positioning also guides the cooling air along a pre-defined path through the stator core and stator frame, further optimizing ventilation and cooling, and improving the unit's heat dissipation efficiency and operational stability.

[0025] Optionally, both ends of some of the above-mentioned wind deflectors are provided with air leakage prevention plates.

[0026] With this configuration, the aforementioned anti-leakage plate can specifically seal the gap between the end of the aforementioned baffle plate and adjacent components, effectively reducing the leakage of cooling air at the contact point between the aforementioned baffle plate and the rotating components, avoiding cooling airflow loss and airflow turbulence caused by air leakage, and ensuring that the cooling air can be concentrated to form a preset loop along the aforementioned rotor yoke, the aforementioned magnetic poles, the aforementioned stator core and the aforementioned stator frame, further improving the unit's ventilation and cooling efficiency. At the same time, the aforementioned anti-leakage plate can enhance the structural strength of the aforementioned baffle plate end, reduce the deformation of the aforementioned baffle plate caused by vibration, and ensure the overall operational stability of the aforementioned baffle plate.

[0027] Optionally, the first wedge, the second wedge, the first inner wedge, and the second inner wedge generate radial clamping force through inclined extrusion. The radial clamping force creates a clamping force between the wind deflector and the fixed bracket, so as to fix the wind deflector in the left and right directions.

[0028] This configuration allows the adjustment action to be converted into a precise and stable radial force by relying on the inclined force transmission characteristics of the wedge structure. This ensures that the wind deflector is reliably fixed in the left and right directions, effectively resisting the displacement of the wind deflector caused by vibration and centrifugal force during unit operation. At the same time, it eliminates the need for bolts to achieve left and right fixation, avoiding the risk of bolt loosening and simplifying the fixing structure. This further meets the convenience and reliability requirements of boltless fixing solutions.

[0029] In summary, the boltless fixing structure for the wind deflector of a large hydro-generator unit disclosed in this utility model has the advantages of reliably fixing the wind deflector without bolts, completely avoiding the risk of bolt loosening, preventing installation misalignment, simplifying the installation process, improving maintenance efficiency, and not affecting the original ventilation and cooling effect of the unit. Attached Figure Description

[0030] To more clearly illustrate the technical solutions of the embodiments of this utility model, 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 utility model and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of a boltless windbreak structure for a large hydro-generator unit according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the outer ring connecting the support rod and the inner ring connecting the support rod in an embodiment of this utility model; Figure 3 This is a schematic diagram of the connection between adjacent windbreaks in an embodiment of this utility model; Figure 4 This is an embodiment of the present utility model. Figure 3 Enlarged view of point A in the middle; Figure 5 This is a schematic diagram of the structure of the windbreak plate in an embodiment of this utility model; Figure 6 This is a schematic diagram of the structure of the fixed bracket in an embodiment of this utility model; Figure 7 This is a schematic diagram of the adjusting wedge structure in an embodiment of the present invention; Figure 8 This is an exploded view of the adjusting wedge in an embodiment of this utility model; Figure 9 This is an assembly diagram showing the connection between the fixed bracket and the adjusting wedge in an embodiment of this utility model; Figure 10 This is an embodiment of the present utility model. Figure 9 Enlarged view of point B in the middle; Figure 11 This is a schematic diagram of a large hydro-generator unit with a boltless windbreak structure according to an embodiment of the present invention.

[0032] Icons: 1-Upper frame support arm, 2-Outer ring connecting support rod, 3-Inner ring connecting support rod, 4-Wind baffle, 5-Fixed bracket, 6-Locking cavity, 7-Adjusting wedge, 8-G-type flange, 9-C-type mounting groove, 10-First wedge, 11-Second wedge, 12-First inner wedge, 13-Second inner wedge, 14-Adjusting screw, 15-Hexagonal head, 16-Adjusting rod locking plate, 17-Hexagonal hole, 18-Hole, 19-Fixing bolt, 20-Fixing baffle, 21-First support rod, 22-Second support rod, 23-Rotor yoke, 24-Magnetic pole, 25-Stator core, 26-Stator base, 27-Air leak-proof plate, 28-Isosceles trapezoidal slot, 29-Narrow channel, 30-Connecting piece, 31-Enlarged piece. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0035] Example See Figures 1 to 11 This embodiment proposes a boltless windbreak structure for a large hydro-generator set, including an upper frame support arm 1; The bottom surface of the upper frame support arm 1 is welded with a support rod connecting outer ring 2 and a support rod connecting inner ring 3. The support rod connecting inner ring 3 is located inside the support rod connecting outer ring 2 and is coaxial with each other. Several spliced ​​wind deflectors 4 are suspended on the side away from the upper frame support arm 1 of the outer ring 2 and the inner ring 3 of the support rod connecting the support rod. Each adjacent wind deflector 4 is provided with a fixed bracket 5, which is suspended and connected to the outer ring 2 and the inner ring 3 of the support rod connection. The adjacent wind deflectors 4 are respectively hooked onto the two sides of the fixed bracket 5 to form a locking cavity 6. The locking cavity 6 is provided with an adjusting wedge 7 for locking the adjacent wind deflectors 4.

[0036] In use, in the boltless fixing device of the large hydro-generator wind deflector 4, the outer ring 2 and the inner ring 3 of the support rod are first fixedly connected to the upper frame support arm 1 to build a stable support frame; the fixed bracket 5 is connected to the frame, and after it is assembled with the wind deflector 4, it forms a locking cavity 6. The wind deflector 4 is initially positioned by adapting to the fixed bracket 5; then the adjusting wedge 7 is embedded in the locking cavity 6, and the wedge-shaped structure of the adjusting wedge 7 generates a clamping force, so that the wind deflector 4 and the fixed bracket 5 can be reliably fixed without bolts. This avoids the risk of loosening of traditional bolts, simplifies the disassembly and assembly process of the wind deflector 4, and ensures that the ventilation and cooling effect of the unit is not affected.

[0037] This embodiment discloses a boltless fixing structure for the wind deflector of a large hydro-generator unit. First, a stable support frame is built by connecting the outer ring 2 of the support rod to the inner ring 3 of the support rod via the upper frame support arm 1. Then, a fixing bracket 5 is connected to this frame, allowing the wind deflector 4 to cooperate with the fixing bracket 5 to form a locking cavity 6. Finally, an adjusting wedge 7 is inserted into the locking cavity 6, and boltless fixing is achieved through wedge compression. This not only fundamentally avoids the hidden dangers of traditional bolt fixing, which is prone to loosening and causing unit accidents, but also eliminates the need for disassembling and installing numerous bolts when assembling and disassembling the segmented wind deflector 4. This significantly improves maintenance efficiency; at the same time, it eliminates the need to drill screw holes on the wind deflector 4 and the fixed bracket 5, avoiding installation misalignment caused by the deformation of the wind deflector 4. Furthermore, the overall structure does not change the original ventilation path, ensuring the continuous ventilation and cooling effect of the unit. This significantly improves the reliability and practicality of fixing the wind deflector 4, thus enabling a boltless fixing structure for the wind deflector of a large hydro-generator unit to reliably fix the wind deflector 4 without bolts, completely avoid the risk of bolt loosening, prevent installation misalignment, simplify the installation process, improve maintenance efficiency, and not affect the original ventilation and cooling effect of the unit.

[0038] See Figures 1 to 11 The outer ring 2 and the inner ring 3 of the support rod are spaced apart from each other. This provides independent and suitable connection points for the suspension installation of several wind baffles 4 in the frame structure formed by the connection of the outer ring 2 and the inner ring 3 of the support rod to the upper frame support arm 1. This avoids mutual interference between the outer ring 2 and the inner ring 3 of the support rod during installation and under stress, ensuring the stability and reliability of the connection of several wind baffles 4. At the same time, the reasonable spacing optimizes the internal space layout of the frame, providing favorable conditions for the subsequent assembly of several wind baffles 4 and the smooth operation of the ventilation circuit inside the unit, further improving the structural adaptability and operational stability of the entire boltless fixing device.

[0039] Several wind deflectors 4 have G-shaped flanges 8 on both sides, and fixed brackets 5 have C-shaped mounting grooves 9 on both sides. The G-shaped flanges 8 of adjacent wind deflectors 4 are hooked into the C-shaped mounting grooves 9 on both sides of the fixed brackets 5. The locking cavity 6 is located in the space where the G-shaped flanges 8 and C-shaped mounting grooves 9 are fastened. This design, on the one hand, enables the wind deflectors 4 to be quickly pre-positioned through the hooking cooperation between the G-shaped flanges 8 and C-shaped mounting grooves 9, greatly simplifying the assembly process. At the same time, the fastening structure naturally restricts the vertical displacement of the wind deflectors 4, enhancing the initial fixing stability. On the other hand, setting the locking cavity 6 in the fastening space allows the adjusting wedge 7 to act precisely on the contact part between the wind deflector 4 and the fixed bracket 5, ensuring efficient transmission of the wedge locking force. Furthermore, adjacent wind deflectors 4 are connected by the grooves on both sides of the same fixed bracket 5, effectively reducing gap air leakage, taking into account both structural stability and ventilation sealing, and further improving the overall performance of the device.

[0040] See Figures 1 to 11 The adjusting wedge 7 has a first wedge 10 and a second wedge 11 symmetrically distributed. A first inner wedge 12 and a second inner wedge 13 are adapted between the first wedge 10 and the second wedge 11. An adjusting screw 14 is axially connected to the first inner wedge 12 and the second inner wedge 13. One end of the adjusting screw 14 is rotatably connected to the end of the second inner wedge 13 near the first inner wedge 12, and the other end of the adjusting screw 14 passes through the first inner wedge 12 and is threadedly connected to the first inner wedge 12. The first inner wedge 12 and the second inner wedge 13 are wedge-shaped structures that are proportionally matched, and the first wedge 10 and the second wedge 11 are wedge-shaped structures that are proportionally matched. The first inner wedge 12 and the second inner wedge 13 are respectively adapted to the wedge-shaped surfaces of the first wedge body 10 and the second wedge body 11. In this way, by rotating the adjusting screw 14 to drive the first inner wedge 12 and the second inner wedge 13 to move relative to each other, the wedge-shaped surfaces can accurately transmit the compressive force, ensuring that the first wedge body 10 and the second wedge body 11 are tightly fitted with the fixed bracket 5 and the wind baffle 4 respectively, achieving stable locking. In addition, the symmetrical structure and matching wedge design can ensure uniform force during the adjustment process, avoid local stress concentration that could lead to component deformation, simplify the adjustment operation, improve the locking reliability and service life of the device, and further ensure the stability of the boltless fixing method.

[0041] The other end of the adjusting screw 14 has a hexagonal head 15. The outer end of the hexagonal head 15 is provided with an adjusting rod locking piece 16 for limiting the rotation of the adjusting screw 14. The end of the adjusting rod locking piece 16 near the hexagonal head 15 has a matching hexagonal hole 17. The end of the adjusting rod locking piece 16 away from the hexagonal head 15 has a hole 18. A fixing bolt 19 is fitted in the hole 18. The fixing bolt 19 passes through the hole 18 and is threaded to the end of the fixing bracket 5. When the adjusting screw 14 reaches the preset torque, the adjusting rod locking piece 16 is connected to the fixing bracket 5 through the fixing bolt 19 to prevent the adjusting screw 14 from loosening.

[0042] See Figures 1 to 11 In this embodiment, on the one hand, the hexagonal head 15 at the other end of the adjusting screw 14 and the hexagonal hole 17 of the adjusting rod locking plate 16 form a precisely matched anti-rotation structure, which can directly restrict the circumferential rotation of the adjusting screw 14 and avoid the unreliability of "relying solely on friction to prevent loosening" in traditional bolt anti-loosening methods; on the other hand, the adjusting rod locking plate 16 is rigidly connected to the fixing bracket 5 through the fixing bolt 19, which transforms the anti-rotation requirement of the adjusting screw 14 into the fixing of the adjusting rod locking plate 16, so that after the adjusting screw 14 reaches the preset torque, It can achieve immediate anti-rotation through the cooperation of hexagonal head 15 and hexagonal hole 17, and form a long-term anti-loosening guarantee through the rigid constraint of fixing bolt 19. It completely eliminates the hidden dangers of loosening of adjusting screw 14 and reduction of preload of wind baffle 4 due to unit vibration. At the same time, the structure can achieve anti-loosening by only "hexagonal cooperation + single fixing bolt 19" without the need for complex anti-loosening components. It takes into account both anti-loosening reliability and operation convenience, which is highly consistent with the core goal of "simplified installation and improved maintenance efficiency" of the overall boltless fixing solution.

[0043] The first wedge 10 fits into the C-shaped mounting groove 9 of the fixed bracket 5, and the second wedge 11 fits into the inner wall of the G-shaped flange 8 of the wind deflector 4. By rotating the adjusting screw 14, the distance between the first wedge 10 and the second wedge 11 can be increased, thereby making the first wedge 10 contact the inner surface of the C-shaped mounting groove 9 of the fixed bracket 5, and the second wedge 11 contact the inner wall of the G-shaped flange 8 of the wind deflector 4, which facilitates restricting the up and down movement of the wind deflector 4.

[0044] See Figures 1 to 11 In this embodiment, the first wedge 10 is fitted with the wall of the C-shaped mounting groove 9 of the fixed bracket 5, and the second wedge 11 is fitted with the inner wall of the G-shaped flange 8 of the wind baffle 4. This allows the locking force of the adjusting wedge 7 to be precisely applied to the matching structure of the fixed bracket 5 and the wind baffle 4. This maximizes the transmission of wedge-shaped extrusion force through the mating surface, ensuring a tight and stable connection between the two and effectively limiting the displacement of the wind baffle 4. It also allows the mating to be achieved by relying on the original matching space of the C-shaped mounting groove 9 and the G-shaped flange 8, without the need for additional force-bearing structures, thus avoiding structural damage to the fixed bracket 5 and the wind baffle 4. At the same time, it ensures the sealing of the mating parts, reduces ventilation leakage, and further balances the structural reliability and ventilation and cooling effect of the device.

[0045] See Figures 1 to 11One end of the fixed bracket 5 has a fixed baffle 20, and the fixed bolt 19 passes through the hole 18 and is threaded onto the fixed baffle 20. This provides a dedicated and stable connection carrier for the fixed bolt 19, avoiding weakening the structural strength by opening holes in the main body of the fixed bracket 5. At the same time, the fixed baffle 20 can accurately limit the installation position of the fixed bolt 19, ensuring that the adjusting rod locking plate 16 and the hexagonal head 15 of the adjusting screw 14 are precisely matched, and the adjusting screw 14 can be quickly fixed to prevent rotation. This balances structural reliability and ease of operation, and further enhances the stability of the adjusting screw 14 in anti-loosening fixation.

[0046] The top edge of the fixed bracket 5 is welded with a first support rod 21 and a second support rod 22. The first support rod 21 and the second support rod 22 are parallel to each other and spaced apart. The ends of the first support rod 21 and the second support rod 22 away from the fixed bracket 5 are respectively welded to the bottom surfaces of the outer ring 2 and the inner ring 3 of the support rod connection. This design can provide stable two-point support for the fixed bracket 5 through the parallel and spaced first support rod 21 and the second support rod 22, ensuring that the fixed bracket 5 is subjected to balanced force and accurate installation position. At the same time, the welded connection strengthens the structural rigidity and avoids the risk of loosening. Furthermore, the first support rod 21 and the second support rod 22 are respectively connected to the outer ring 2 and the inner ring 3 of the support rod connection, so that the fixed bracket 5 and the overall frame form a stable connection, further ensuring the positional stability and operational reliability of the wind deflector 4 after installation, without affecting the internal ventilation space.

[0047] See Figures 1 to 11 The bottom of several baffles 4 are sequentially fitted with rotor yoke 23, magnetic poles 24, stator core 25 and stator frame 26. The baffles 4 are suspended above the rotor yoke 23 and magnetic poles 24. This structure allows the baffles 4 to precisely align with the layout of the core components of the unit, ensuring full coverage of the rotor yoke 23 and magnetic poles 24 and effectively reducing air leakage and turbulence in critical areas. The suspension connection also prevents the baffles 4 from directly contacting the rotating components, ensuring safe operation of the unit. At the same time, the precise positioning guides the cooling air along a preset path through the stator core 25 and stator frame 26, further optimizing the ventilation and cooling effect and improving the unit's heat dissipation efficiency and operational stability.

[0048] Both ends of several baffles 4 are provided with anti-leakage plates 27. The anti-leakage plates 27 can specifically seal the gap between the end of the baffle 4 and the adjacent components, effectively reducing the leakage of cooling air at the contact point between the baffle 4 and the rotating components, avoiding the loss of cooling airflow and airflow turbulence caused by air leakage, and ensuring that the cooling air can be concentrated to form a preset loop along the rotor yoke 23, magnetic pole 24, stator core 25 and stator frame 26, further improving the unit's ventilation and cooling efficiency. At the same time, the anti-leakage plates 27 can enhance the structural strength of the end of the baffle 4, reduce the deformation of the baffle 4 caused by vibration, and ensure the overall operational stability of the baffle 4.

[0049] See Figures 1 to 11 The first wedge 10, the second wedge 11, the first inner wedge 12, and the second inner wedge 13 generate radial clamping force through inclined extrusion. The radial clamping force forms a clamping force between the wind baffle 4 and the fixed bracket 5, which facilitates the fixation of the wind baffle 4 in the left and right directions. In this way, relying on the inclined force transmission characteristics of the wedge structure, the adjustment action is converted into a precise and stable radial force, ensuring that the wind baffle 4 is reliably fixed in the left and right directions. This effectively resists the displacement of the wind baffle 4 caused by vibration and centrifugal force during unit operation. At the same time, it does not require bolts to achieve left and right fixation, which avoids the risk of bolt loosening and simplifies the fixing structure, further meeting the convenience and reliability requirements of boltless fixing schemes.

[0050] See Figures 1 to 11 In this embodiment, the first wedge 10 and the second wedge 11, when joined together, have an internal structure in which each end has an isosceles trapezoidal groove 28. Between the smallest ends of the two isosceles trapezoidal grooves 28 is a narrow channel 29 for the adjustment screw 14 to rotate. The diameter of the smallest ends of the isosceles trapezoidal grooves 28 gradually decreases and is adapted to the diameter of the narrow channel 29. The first inner wedge 12 and the second inner wedge 13 are isosceles trapezoidal bodies adapted to the two isosceles trapezoidal grooves 28. When the adjustment screw 14 is rotated and tightened, the first inner wedge 12 and the second... The inner wedge 13 will move closer together. Specifically, the first inner wedge 12 and the second inner wedge 13 slide closer together along the two isosceles trapezoidal grooves 28. As the two isosceles trapezoidal grooves 28 get closer together, the channel becomes narrower. Therefore, the first wedge 10 and the second wedge 11 will be pushed apart to both sides. The pushed-out first wedge 10 and the second wedge 11 will press against the connection between the wind deflector 4 and the fixed bracket 5, making the connection between the wind deflector 4 and the fixed bracket 5 more stable, and enabling the wind deflector 4 to be reliably fixed without the use of bolts.

[0051] See Figures 1 to 11 In this embodiment, the outer ring 2 and the inner ring 3 of the support rod are connected to the upper frame support arm 1, fixing the outer ring 2 and the inner ring 3. One end of the first support rod 21 and the second support rod 22 are connected to the outer ring 2 and the inner ring 3 of the support rod, respectively. The other end of the first support rod 21 and the second support rod 22 are connected to the fixed bracket 5. The baffle plate 4 is placed in the C-shaped mounting groove 9 of the fixed bracket 5, so that the baffle plate 4 covers the magnetic pole 24 and the rotor yoke 23, so that the circulating air generated by the rotor rotation forms a cooling circulation loop through the rotor yoke 23, the magnetic pole 24, the stator core 25 and the stator frame 26. The adjusting wedge 7 is inserted into the locking cavity 6 formed by the fixed bracket 5 and the baffle plate 4. The baffle plate 4 is pressed and fixed to the fixed bracket 5 by adjusting the adjusting screw 14. The adjusting screw 14 is fixed by the adjusting rod locking piece 16, and the adjusting rod locking piece 16 is fixed by the fixing bolt 19.

[0052] See Figures 1 to 11 In this embodiment, both ends of the first support rod 21 and the second support rod 22 are welded with connecting pieces 30. The fixed brackets 5 corresponding to the first support rod 21 and the second support rod 22 have enlarged pieces 31. This design is beneficial to enlarge the welding surfaces of the two ends of the first support rod 21 and the second support rod 22 with the upper frame support arm 1 and the fixed bracket 5, improve the strength of the interconnection, and facilitate the stable suspension of several wind baffles 4 above the rotor yoke 23 and the magnetic pole 24.

[0053] See Figures 1 to 11 The working principle of the boltless windbreak structure of the large hydro-generator unit in this embodiment is as follows: After the outer ring 2 and the inner ring 3 of the support rod are connected and fixed to the upper frame support arm 1, the first support rod 21 and the second support rod 22 are installed and fixed. The first support rod 21 and the second support rod 22 are connected and fixed to the fixed bracket 5. The distance between the fixed brackets 5 is adjusted so that the distance between each fixed bracket 5 meets the installation requirements of the wind deflector 4. Place the wind deflector 4 into the C-shaped mounting slot 9 of the fixed bracket 5. After all the wind deflectors 4 are placed into the C-shaped mounting slot 9 of the fixed bracket 5, insert the adjusting wedge 7 into the locking cavity 6 formed by the fixed bracket 5 and the wind deflector 4. Adjust the adjusting screw 14 of the adjusting wedge 7 to move the first inner wedge 12 and the second inner wedge 13 relative to each other. Since the first inner wedge 12, the second inner wedge 13, the first wedge body 10, and the second wedge body 11 are proportionally matched wedge structures, rotating the adjusting screw 14 increases the distance between the first wedge body 10 and the second wedge body 11, causing the first wedge body 10 to contact the inner surface of the fixed bracket 5 and the second wedge body 11 to contact the end face of the wind deflector 4. The adjusting screw 14 causes the inclined surfaces of the first wedge 10, the second wedge 11, the first inner wedge 12, and the second inner wedge 13 to compress each other, generating a radial clamping force that clamps the wind baffle 4 to the fixed bracket 5, thereby fixing the wind baffle 4 in the left and right directions. Since the edge of the wind baffle 4 is provided with a G-shaped flange 8, the G-shaped flange 8 is fixed to the second wedge 11 of the adjusting wedge 7, limiting the up and down movement of the wind baffle 4. After the adjusting screw 14 reaches the required torque, the adjusting rod locking plate 16 is installed. The adjusting rod locking plate 16 can prevent the adjusting screw 14 from loosening and avoid the decrease of the fixing preload of the wind baffle 4. The adjusting rod locking plate 16 is connected to the fixed bracket 5 through the fixing bolt 19.

[0054] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A boltless structure for fixing the windbreak plate of a large hydro-generator unit, characterized in that: Including the upper frame support arm (1); The bottom surface of the upper frame support arm (1) is fixedly connected with a support rod connecting outer ring (2) and a support rod connecting inner ring (3). The support rod connecting inner ring (3) is located inside the support rod connecting outer ring (2) and is coaxial with each other. Several spliced ​​wind deflectors (4) are suspended on the side away from the upper frame support arm (1) of the outer ring (2) and the inner ring (3) of the support rod; Each of the adjacent wind deflectors (4) is provided with a fixed bracket (5), which is suspended and connected to the outer ring (2) of the support rod and the inner ring (3) of the support rod; The adjacent wind deflector (4) is hooked onto the two sides of the fixed bracket (5) to form a locking cavity (6), and the locking cavity (6) is provided with an adjusting wedge (7) for locking the adjacent wind deflector (4).

2. The boltless fixing structure for the windbreak plate of a large hydro-generator unit according to claim 1, characterized in that: The outer ring (2) connecting the support rod and the inner ring (3) connecting the support rod are distributed at intervals.

3. The boltless fixing structure for the windbreak plate of a large hydro-generator unit according to claim 1, characterized in that: Several of the wind deflectors (4) have G-shaped flanges (8) on both sides, and the fixed bracket (5) has C-shaped mounting grooves (9) on both sides. The G-shaped flanges (8) of adjacent wind deflectors (4) are respectively hooked into the C-shaped mounting grooves (9) on both sides of the fixed bracket (5). The locking cavity (6) is located in the space where the G-shaped flanges (8) and the C-shaped mounting grooves (9) are fastened.

4. The boltless fixing structure for the windbreak plate of a large hydro-generator unit according to claim 3, characterized in that: The adjusting wedge (7) has a first wedge (10) and a second wedge (11) symmetrically distributed. A first inner wedge (12) and a second inner wedge (13) are adapted between the first wedge (10) and the second wedge (11). An adjusting screw (14) is axially connected to the first inner wedge (12) and the second inner wedge (13). One end of the adjusting screw (14) is rotatably connected to the end of the second inner wedge (13) near the first inner wedge (12). The other end of the adjusting screw (14) passes through the first inner wedge (12) and is threadedly connected to the first inner wedge (12). The first inner wedge (12) and the second inner wedge (13) are wedge-shaped structures that are proportionally matched. The first wedge (10) and the second wedge (11) are wedge-shaped structures that are proportionally matched. The first inner wedge (12) and the second inner wedge (13) are adapted to the wedge-shaped surfaces of the first wedge (10) and the second wedge (11), respectively.

5. The boltless fixing structure for the windbreak plate of a large hydro-generator unit according to claim 4, characterized in that: The other end of the adjusting screw (14) has a hexagonal head (15). The outer end of the hexagonal head (15) is provided with an adjusting rod locking piece (16) for limiting the rotation of the adjusting screw (14). The adjusting rod locking piece (16) has a matching hexagonal hole (17) at one end near the hexagonal head (15). The adjusting rod locking piece (16) has a hole (18) at one end away from the hexagonal head (15). A fixing bolt (19) is fitted in the hole (18). The fixing bolt (19) passes through the hole (18) and is threaded to the end of the fixing bracket (5).

6. The boltless fixing structure for the windbreak plate of a large hydro-generator unit according to claim 4, characterized in that: The first wedge (10) is fitted against the wall of the C-shaped mounting groove (9) of the fixed bracket (5), and the second wedge (11) is fitted against the inner wall of the G-shaped flange (8) of the wind deflector (4).

7. The boltless fixing structure for the windbreak plate of a large hydro-generator unit according to claim 5, characterized in that: One end of the fixed bracket (5) has a fixed baffle (20), and the fixed bolt (19) passes through the hole (18) and is threaded onto the fixed baffle (20).

8. The boltless fixing structure for the windbreak plate of a large hydro-generator unit according to claim 1, characterized in that: The top edge of the fixed bracket (5) is welded with a first support rod (21) and a second support rod (22). The first support rod (21) and the second support rod (22) are parallel to each other and spaced apart. The ends of the first support rod (21) and the second support rod (22) away from the fixed bracket (5) are respectively welded to the bottom surfaces of the outer ring (2) and the inner ring (3) of the support rod connecting ring.

9. The boltless fixing structure for the windbreak plate of a large hydro-generator unit according to claim 1, characterized in that: The bottom of several of the wind baffles (4) are sequentially fitted with a rotor yoke (23), a magnetic pole (24), a stator core (25) and a stator frame (26), and the several wind baffles (4) are suspended above the rotor yoke (23) and the magnetic pole (24).

10. The boltless fixing structure for the windbreak plate of a large hydro-generator unit according to claim 1, characterized in that: Both ends of several of the aforementioned wind deflectors (4) are provided with air leakage prevention plates (27).

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