A wind turbine casing integral stretch-formed reinforcing rib structure

Abstract

This utility model relates to the field of wind turbine manufacturing technology, specifically to an integrally stretched and molded reinforcing rib structure for a wind turbine casing. It includes an annular casing body with multiple wavy, extended main reinforcing ribs integrally stretched and molded on the inner wall of the annular casing body. Multiple auxiliary reinforcing ribs are arranged between the main reinforcing ribs, forming an alternating arrangement. An annular guide groove is provided at the air inlet of the annular casing body, and several inclined guide plates are provided along the edge of the annular guide groove. The ends of the guide plates are all connected to the main reinforcing ribs. This integrally stretched and molded reinforcing rib structure for the wind turbine casing improves the overall strength and deformation resistance of the casing, improves airflow organization, reduces energy consumption, and simplifies the manufacturing process. It has the advantages of simple structure, stable performance, and long service life.

Description

Technical Field

[0001] This utility model relates to the field of wind turbine manufacturing technology, specifically to an integrally stretched reinforced rib structure for wind turbine housing. Background Technology

[0002] Fans are widely used in industrial fields, and their outer casing not only protects internal components but also significantly impacts the overall structural strength and operational stability of the machine. To improve casing strength, reinforcing ribs are typically incorporated into the inner wall. In recent years, with advancements in manufacturing processes, one-piece molding technology has been increasingly applied to fan casing production to enhance structural integrity and manufacturing efficiency.

[0003] In existing technologies, wind turbine casings have integrated reinforcing ribs, but these ribs are mostly straight or regular ring structures with a relatively simple arrangement. This makes them unable to effectively address the problem of localized stress concentration during high-speed operation of the wind turbine. Furthermore, these structures often only consider enhancing rigidity while neglecting the impact on airflow organization, which can easily cause airflow disturbances and increase energy consumption. At the same time, due to the lack of optimized design in the cross-sectional shape and size of the reinforcing ribs, they still have the risk of localized deformation when subjected to external loads, affecting the overall service life and safety performance of the wind turbine. Utility Model Content

[0004] The purpose of this utility model is to provide an integrally stretched and formed reinforcing rib structure for a fan casing, so as to solve the problems mentioned in the background art, such as the single form of the current fan casing reinforcing rib structure, uneven stress distribution, large airflow disturbance, and insufficient load-bearing capacity.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an integrally stretched reinforced rib structure for a fan housing, comprising an annular housing body, wherein multiple main reinforcing ribs extending in a wave-like pattern are integrally stretched on the inner wall of the annular housing body, and multiple auxiliary reinforcing ribs are provided between the main reinforcing ribs, the auxiliary reinforcing ribs being staggered with the main reinforcing ribs, and an annular guide groove is provided at the air inlet of the annular housing body, and several inclined guide plates are provided at the edge of the annular guide groove, the ends of which are all connected to the main reinforcing ribs, forming an overall reinforced structure that enhances the airflow guiding function.

[0006] Preferably, the main reinforcing rib has a continuous wave-shaped undulating structure along the axial direction of the fan, and adjacent wave peaks are connected by a circular arc transition.

[0007] Preferably, the auxiliary reinforcing rib is disposed in the recessed area between adjacent main reinforcing ribs, and its cross-section is inverted "V" shaped, and the top of the auxiliary reinforcing rib is continuously transitioned to the inner wall of the annular outer shell body.

[0008] Preferably, the bottom of the annular guide channel is an arc-shaped curved surface, and the depth of the channel gradually decreases from the center outwards.

[0009] Preferably, one end of the guide plate is fixed to the edge of the annular guide groove, and the other end is inclined at an angle to the air outlet direction of the fan, and the surface of the guide plate is provided with anti-vortex texture.

[0010] Preferably, the anti-vortex pattern consists of parallel micro-convex stripes whose direction is consistent with the tilt direction of the guide plate.

[0011] Compared with existing technologies, the beneficial effects of this utility model are as follows: the one-piece stretched and formed reinforcing rib structure of the fan shell improves the overall strength and deformation resistance of the shell, improves airflow organization, reduces energy consumption, and simplifies the manufacturing process. It has the advantages of simple structure, stable performance, and long service life. The structure effectively disperses stress concentration and enhances structural load-bearing capacity through the design of the main reinforcing ribs extending in a wave shape and interleaving with the auxiliary reinforcing ribs. Combined with the setting of the annular guide groove and inclined guide plate, the airflow enters more smoothly and steadily, reducing energy loss and improving the fan's operating efficiency. The overall structure is achieved through a one-piece stretched forming process, which not only improves production efficiency but also enhances the reliability of connections between components, showing good application prospects. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of an integrally stretched and formed reinforcing rib structure for a fan housing according to the present invention;

[0013] Figure 2 This is a schematic diagram of the internal structure of the air inlet end of the annular shell body with an integrally stretched and reinforced rib structure for a fan shell according to this utility model.

[0014] Figure 3 This is a schematic diagram of the internal structure of the air outlet end of the annular shell body with an integrally stretched and reinforced rib structure for a fan shell according to this utility model.

[0015] In the diagram: 1. Annular outer shell body; 2. Main reinforcing rib; 3. Auxiliary reinforcing rib; 4. Annular guide groove; 5. Guide plate; 6. Anti-vortex pattern. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] Please see Figure 1-3This utility model provides a technical solution: an integrally stretched reinforced rib structure for a fan casing, comprising an annular casing body 1. Multiple wavy main reinforcing ribs 2 are integrally stretched and formed on the inner wall of the annular casing body 1. The main reinforcing ribs 2 are made of a special alloy material with high strength, fatigue resistance, and corrosion resistance, ensuring long-term stable performance in extreme environments. Multiple auxiliary reinforcing ribs 3 are provided between the main reinforcing ribs 2, forming an alternating arrangement with the main reinforcing ribs 2. An annular guide groove 4 is provided at the air inlet of the annular casing body 1, and several inclined guide plates 5 are provided at the edge of the annular guide groove 4. The ends of the guide plates 5 are all connected to the main reinforcing ribs 2, forming an overall reinforced structure that enhances airflow guidance. This structure is used in fan... During operation, airflow enters the annular outer shell 1 through the air inlet. At this time, the annular guide channel 4 located at the air inlet, together with the inclined guide plates 5, guides the airflow smoothly into the fan along the inclined direction of the guide plates 5, effectively reducing airflow turbulence and energy loss. Simultaneously, the main reinforcing ribs 2 extend in a wave-like shape along the inner wall of the shell and are staggered with the auxiliary reinforcing ribs 3, giving the entire annular outer shell 1 structure stronger resistance to deformation when subjected to airflow impact and external loads. This is achieved not only through advanced manufacturing processes ensuring precise forming but also through meticulous attention to seamless connections between components, improving the overall structural reliability. The wave-like structure of the main reinforcing ribs 2 can more evenly distribute stress, avoiding localized stress concentration. To prevent fatigue damage, the auxiliary reinforcing rib 3 serves as a supplementary support structure, enhancing the connection stiffness between the main reinforcing ribs 2 and improving the overall load-bearing capacity. The end of the guide plate 5 is directly connected to the main reinforcing rib 2, creating a mechanical synergy between the aerodynamic guiding components and the structural reinforcement components. This improves airflow organization efficiency while also enhancing the overall structural stability, effectively overcoming the technical problems of insufficient strength, large airflow disturbance, and high energy consumption caused by the simple reinforcing rib layout and independent guide structure of traditional fan casings. The main reinforcing rib 2 has a continuous wave-shaped undulating structure along the fan axial direction, with adjacent peaks connected by arc transitions. This structure effectively disperses the stress distribution on the annular casing body 1 during fan operation, avoiding the stress distribution issues of traditional straight-line structures. To address the issue of localized stress concentration that can easily occur with ribs of the main or ring shape, the wavy design of the main reinforcing rib 2 provides better flexibility and support stiffness when subjected to external loads or internal airflow impacts, enhancing the overall resistance to deformation. Simultaneously, the arc-shaped transition connection reduces the risk of stress concentration caused by abrupt structural changes, enhancing structural fatigue strength and significantly improving the stability and service life of the ring-shaped shell body 1. The auxiliary reinforcing rib 3 is located in the recessed area between adjacent main reinforcing ribs 2, with an inverted "V" shaped cross-section. The top of the auxiliary reinforcing rib 3 transitions continuously with the inner wall of the ring-shaped shell body 1. This structure, while enhancing the overall rigidity of the ring-shaped shell body 1, effectively fills the weak areas of mechanical support between the main reinforcing ribs 2, forming a multi-directional load-bearing composite reinforcement system.The inverted "V" shaped cross-section design of the auxiliary reinforcing rib 3 helps to disperse stress loads from different directions, improving local compressive and bending resistance. The continuous transition between the auxiliary reinforcing rib 3 and the inner wall of the outer shell avoids stress concentration caused by structural abrupt changes, enhancing stress uniformity and structural reliability. The bottom of the annular guide channel 4 is an arc-shaped curved surface, and the channel depth gradually decreases from the center outwards. This structure effectively guides the airflow entering the fan to smoothly transition along the arc-shaped surface of the annular guide channel 4, reducing airflow impact and separation. The design of the channel depth decreasing from the inside out conforms to the flow characteristics of gradual air diffusion, further optimizing the intake airflow organization and reducing flow resistance and energy loss. One end of the guide plate 5 is fixed... The guide vane 5 is positioned at the edge of the annular guide groove 4, with the other end angled towards the fan outlet direction. The surface of the guide vane 5 is provided with anti-vortex patterns 6, which are parallel, micro-raised stripes whose direction is consistent with the tilt direction of the guide vane 5. This structure effectively guides the incoming airflow through the guide vane 5 during fan operation, ensuring orderly flow along the outlet direction, reducing airflow turbulence and energy loss. Simultaneously, the anti-vortex patterns 6, with their stripe structure aligned with the airflow direction, further suppress boundary layer separation, weaken vortex generation, and reduce flow resistance, thereby improving overall aerodynamic performance and fan operating efficiency. The micro-raised stripe design of the anti-vortex patterns 6 significantly improves airflow characteristics and reduces flow resistance.

[0018] Working Principle: When using the one-piece stretched reinforced rib structure of this fan casing, the airflow first enters the internal cavity through the air inlet of the annular casing body 1. As the fan operates, the airflow begins to move along the guide path of the air inlet area. At this time, multiple guide plates 5 on the edge of the annular guide groove 4 provide initial guidance for the airflow. Since the guide plates 5 are inclined, with one end fixed to the edge of the annular guide groove 4 and the other end extending towards the air outlet direction, the airflow direction is gradually adjusted, allowing it to be pushed more smoothly into the fan. The anti-vortex pattern 6 applies a certain directional constraint to the airflow as it passes through, reducing... With a tendency towards less turbulent flow, as the airflow continues to move forward, it gradually covers the structural area formed by the main reinforcing rib 2 and the auxiliary reinforcing rib 3. The main reinforcing rib 2 extends continuously in a wave-like shape along the fan axis and connects adjacent wave crests through arc transitions, causing the airflow to form a certain adhering flow state on its surface. The auxiliary reinforcing rib 3 is located between adjacent main reinforcing ribs 2 and also has a certain conforming influence on the airflow direction. As the airflow continues to penetrate deeper into the fan, the overall flow tends to stabilize and completes the entire process from air intake to air exhaust under the synergistic effect of the various structures, thus completing a series of tasks.

[0019] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A wind turbine housing integrally stretched and formed reinforcing rib structure, comprising an annular housing body (1), characterized in that: The inner wall of the annular shell body (1) is integrally stretched and formed with multiple main reinforcing ribs (2) extending in a wave shape. Multiple auxiliary reinforcing ribs (3) are provided between the main reinforcing ribs (2). The auxiliary reinforcing ribs (3) and the main reinforcing ribs (2) are arranged in an alternating pattern. An annular guide groove (4) is provided at the air inlet of the annular shell body (1). Several guide plates (5) are provided at the edge of the annular guide groove (4) and are distributed at an inclined angle. The ends of the guide plates (5) are all connected to the main reinforcing ribs (2), forming an overall reinforcing structure that enhances the airflow guiding function.

2. The integrally stretched reinforced rib structure for a fan housing according to claim 1, characterized in that: The main reinforcing rib (2) has a continuous wave-shaped undulating structure along the axial direction of the fan, and adjacent peaks are connected by a circular arc transition.

3. The integrally stretched reinforced rib structure for a fan housing according to claim 1, characterized in that: The auxiliary reinforcing rib (3) is located in the recessed area between adjacent main reinforcing ribs (2), and its cross-section is inverted "V" shape. The top of the auxiliary reinforcing rib (3) is continuously transitioned to the inner wall of the annular shell body (1).

4. The integrally stretched reinforced rib structure for a fan housing according to claim 1, characterized in that: The bottom of the annular guide channel (4) is an arc-shaped curved surface, and the depth of the channel gradually decreases from the center to the outside.

5. The integrally stretched reinforced rib structure for a fan housing according to claim 1, characterized in that: One end of the guide plate (5) is fixed to the edge of the annular guide groove (4), and the other end is inclined at an angle to the direction of the fan outlet. The surface of the guide plate (5) is provided with anti-vortex texture (6).

6. The integrally stretched reinforced rib structure for a fan housing according to claim 5, characterized in that: The anti-vortex pattern (6) consists of parallel micro-convex stripes, the direction of which is consistent with the tilt direction of the guide plate (5).

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