Glass reinforced plastic speed tube cylindrical fan

Abstract

The utility model discloses glass reinforced plastic speed increasing pipe cylinder type fan, including glass reinforced plastic air duct, still include the air inlet ring of glass reinforced plastic air duct air inlet end, the air outlet ring of glass reinforced plastic air duct air outlet end and be connected in the circumferential support assembly for providing the structure rigidity between air inlet ring and air outlet ring, the utility model discloses glass reinforced plastic air duct, air inlet ring, air outlet ring and circumferential support assembly etc. part, adopt sectional modular design cooperation M type alternate inclined truss type support structure, utilize the high specific strength characteristics of glass reinforced plastic to replace traditional all steel framework, and will support node and air duct splicing joint staggered arrangement to disperse stress, in the significant reduction device overall weight, reduce high altitude hoisting and transportation cost's time, the field assembly cycle is greatly shortened, effectively solved the background art large speed increasing cylinder because the weight is too big and leads to hoisting expensive and the overall size causes the transportation and construction difficult technical problem of overrunning of large speed increasing cylinder.

Description

Technical Field

[0001] This utility model relates to the field of fan structure technology, specifically to a fiberglass speed-increasing tube-type fan. Background Technology

[0002] As a crucial piece of equipment for improving wind energy utilization, speed-increasing duct-type wind turbines primarily utilize the principle of fluid acceleration to improve the aerodynamic characteristics of the rotor surface. The curvature retention of the duct body and the stability of the overall support structure directly determine the power generation efficiency and operational safety of the unit. With the expansion of wind power generation technology into low-wind-speed areas and the increasing size of turbines, the size and weight of speed-increasing ducts are growing. Traditional structural designs are gradually revealing many limitations in coping with complex high-altitude wind loads and controlling construction costs, making it difficult to meet the urgent needs of modern wind farms for cost reduction and efficiency improvement.

[0003] Existing speed-increasing cylinders typically employ a large steel frame to ensure rigidity. While stable, this results in excessive overall weight, making transportation difficult and high-altitude hoisting costs extremely expensive. Some improved technologies attempt to replace part of the rigid shell with flexible materials (such as membrane materials) to achieve weight reduction, but flexible materials generally suffer from difficulties in installation and tensioning, and poor shape retention. In actual operation, flexible structures are highly susceptible to deformation due to wind pressure changes, failing to maintain the specific guide curvature required by the design, leading to a significant decrease in aerodynamic efficiency. Furthermore, traditional connection and support methods often lack effective modular design, resulting in time-consuming on-site assembly, and a single support structure cannot simultaneously achieve the dual goals of lightweight and high strength. Therefore, this invention proposes a fiberglass speed-increasing cylinder type fan to solve the above problems. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, such as excessive weight of the speed-increasing cylinder, easy deformation of flexible materials, and difficult installation, this invention achieves lightweight construction and convenient transportation and installation by incorporating a fiberglass duct and segmented modular inlet and outlet rings, along with an M-shaped triangular truss-style circumferential support assembly. Simultaneously, the high rigidity of fiberglass maintains the streamlined curvature, and the staggered layout of the support nodes and fiberglass panel joints disperses stress, avoiding failures caused by stress concentration in traditional structures and deformation instability due to the lack of rigidity in flexible membrane materials.

[0006] (II) Technical Solution

[0007] To achieve the above objectives, this utility model provides the following technical solution: a fiberglass speed-increasing cylindrical fan, comprising a fiberglass duct, an inlet ring at the air inlet end of the fiberglass duct, an outlet ring at the air outlet end of the fiberglass duct, and a circumferential support assembly connecting the inlet ring and the outlet ring to provide structural rigidity; the fiberglass duct is formed by sequentially splicing several sections of arc-shaped fiberglass plates of the same specifications along the circumferential direction to form a circular cylindrical structure, with the two ends of the arc-shaped fiberglass plates respectively fixedly connected to the inlet ring and the outlet ring by bolts; the circumferential support assembly is in the form of an M-shaped continuous zigzag structure connected between the inlet ring and the outlet ring, and the connection nodes of the circumferential support assembly and the inlet and outlet rings are staggered from the splicing seams between the arc-shaped fiberglass plates in the circumferential direction.

[0008] Preferably, the air inlet ring is formed by splicing together at least two segments of first arc-shaped circular tubes, and the ends of adjacent first arc-shaped circular tubes are fixed together by bolts to form a ring; the air outlet ring is formed by splicing together at least two segments of second arc-shaped circular tubes, and the ends of adjacent second arc-shaped circular tubes are fixed together by bolts to form a ring.

[0009] Preferably, the circumferential support assembly includes several supporting circular tubes, which are evenly distributed circumferentially, and the two ends of each supporting circular tube are alternately inclined and connected to the air inlet ring and the air outlet ring, so as to form a triangular truss support structure between the air inlet ring and the air outlet ring.

[0010] Preferably, the air outlet ring has an extension section extending rearward along the axial direction, and a flexible material is connected to the extension section. The flexible material is in a tensioned state after installation to maintain the curvature of the air outlet.

[0011] (III) Beneficial Effects

[0012] Compared with the prior art, this utility model provides a fiberglass speed-increasing tube-type fan, which has the following beneficial effects:

[0013] 1. This utility model uses components such as fiberglass duct, air inlet ring, air outlet ring, and circumferential support assembly. It adopts a segmented modular design with an M-shaped alternating inclined truss support structure. It utilizes the high specific strength of fiberglass to replace the traditional all-steel frame. The support nodes and duct splice seams are staggered to disperse stress. This significantly reduces the overall weight of the device, lowers the cost of high-altitude hoisting and transportation, and greatly shortens the on-site assembly cycle. It effectively solves the technical problems in the background technology of large speed-increasing cylinders, which are expensive to hoist due to excessive weight and difficult to transport and construct due to oversized overall dimensions.

[0014] 2. This utility model constructs a rigid-flexible airflow guiding system by using components such as fiberglass duct, air outlet ring, and flexible materials. The rigidity of the fiberglass duct maintains the streamlined curvature of the main body, and the rigid air outlet ring extension serves as a fulcrum to pre-tension the flexible material at the tail. This ensures the aerodynamic stability of the duct body under complex wind loads, prevents the flexible tail fin from flapping or collapsing, and effectively improves the defects of the pure flexible structure in the background technology, which is prone to deformation due to insufficient rigidity, resulting in decreased wind energy utilization and unstable aerodynamic efficiency. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of the fiberglass speed-increasing tube-type fan proposed in this utility model;

[0016] Figure 2 for Figure 1 Schematic diagram of cross-section structure;

[0017] In the diagram: 1. Fiberglass duct; 2. Inlet ring; 3. Outlet ring; 4. Circumferential support assembly; 5. Flexible material. Detailed Implementation

[0018] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0019] This utility model provides a technical solution for a fiberglass speed-increasing tube-type fan:

[0020] Please see Figure 1-2A fiberglass speed-increasing cylindrical fan includes a fiberglass duct 1, an inlet ring 2 located at the air inlet end of the fiberglass duct 1, an outlet ring 3 located at the air outlet end of the fiberglass duct 1, and a circumferential support assembly 4 connecting the inlet ring 2 and the outlet ring 3 to provide structural rigidity. The fiberglass duct 1 is formed by sequentially splicing several sections of arc-shaped fiberglass plates of the same specifications along the circumferential direction to form a circular cylindrical structure. The two ends of the arc-shaped fiberglass plates are respectively fixed to the inlet ring 2 and the outlet ring 3 by bolts. The circumferential support assembly 4 is an M-shaped continuous zigzag structure connected between the inlet ring 2 and the outlet ring 3, and the connection nodes of the circumferential support assembly 4 and the inlet and outlet rings are staggered from the splicing seams between the arc-shaped fiberglass plates in the circumferential direction. Furthermore, in this embodiment, by using a fiberglass duct 1 instead of a traditional pure steel structure or large-area flexible membrane material, the high specific strength of fiberglass effectively solves the problem of high hoisting costs caused by the excessive weight of all-steel structures in the prior art, while avoiding the defects of all-flexible materials being prone to collapse and deformation under wind pressure. In addition, the staggered layout of the circumferential support component 4 and the fiberglass plate splicing seams optimizes the overall force transmission path and avoids the risk of stress concentration caused by overlapping connection points, thereby ensuring that the overall structure still has sufficient rigidity and stability under lightweight design, solving the problem that a single support structure cannot simultaneously achieve lightweight and high strength.

[0021] The air inlet ring 2 is composed of at least two segments of first arc-shaped circular tubes, with adjacent segments fixed together by bolts to form a ring. The air outlet ring 3 is composed of at least two segments of second arc-shaped circular tubes, with adjacent segments fixed together by bolts to form a ring. Furthermore, in this embodiment, the segmented splicing design of the air inlet ring 2 and the air outlet ring 3, as well as the segmented structure of the fiberglass duct 1, completely breaks the size limitations of traditional integrated transportation of large speed-increasing cylinders, solving the problem of difficult transportation of ultra-large components mentioned in the background art. By modularizing the ring body, it is easy to quickly assemble it with bolts after transportation to the site, significantly reducing on-site construction difficulty and labor costs, and overcoming the technical defects of long on-site assembly time in the background art.

[0022] The circumferential support component 4 includes several supporting circular tubes, which are evenly distributed circumferentially. Each supporting circular tube is alternately inclined at both ends and connected to the air inlet ring 2 and the air outlet ring 3, forming a triangular truss-type support structure between the air inlet ring 2 and the air outlet ring 3. Furthermore, in this embodiment, the triangular truss-type support structure formed by the alternating inclined connections utilizes the geometric stability of triangles, significantly reducing steel consumption while providing torsional and bending stiffness exceeding that of unidirectional supports. This design specifically addresses the weight redundancy problem caused by the use of large amounts of steel structures to ensure stiffness in the prior art, achieving structural lightweighting and indirectly reducing the load requirements on the tower and foundation.

[0023] The outlet ring 3 has an extension section extending rearward along the axial direction, and a flexible material 5 is connected to the extension section. After installation, the flexible material 5 is in a tensioned state to maintain the curvature of the air outlet. Furthermore, in this embodiment, the flexible material 5 is only provided in the extension section of the outlet ring 3. This utilizes the lightweight characteristics of the flexible material to further reduce the weight moment at the cantilever end, while the rigid outlet ring 3 serves as a support for pre-tensioning. This structure effectively overcomes the shortcomings of the fully flexible structure in the prior art, which suffers from installation difficulties and poor shape retention due to the lack of rigid frame support. It ensures that the wake section maintains a good aerodynamic shape under tension, preventing the air outlet from collapsing due to changes in wind pressure, thereby guaranteeing the speed-increasing effect.

[0024] In practical use, the working principle of this utility model is as follows:

[0025] In practical use and installation, the various components of this invention are first transported to the construction site. Because the inlet ring 2, outlet ring 3, and fiberglass duct 1 all adopt a segmented modular design, the dimensions of each component are within the loading range of conventional transport vehicles, effectively overcoming the transportation difficulties caused by the excessively large overall size of large speed-increasing cylinders in the prior art. Upon arrival at the site, construction workers connect the arc-shaped pipe sections end-to-end with bolts, assembling them into complete inlet ring 2 and outlet ring 3. Then, the segmented arc-shaped fiberglass plates are sequentially spliced ​​and fixed between the two rings, completing the assembly of the fiberglass duct 1. This on-site assembly method significantly shortens the construction cycle and reduces reliance on large lifting equipment.

[0026] During assembly, the circumferential support component 4 is installed between the inlet ring 2 and the outlet ring 3. This component is composed of several supporting circular tubes connected at alternating inclines, forming a stable triangular truss-like support structure between the inlet and outlet rings. When the fan is operating at high altitude and subjected to complex wind loads, the circumferential support component 4 utilizes the geometric stability of a triangle to efficiently distribute the bending moment and torque generated by wind pressure and its own weight to the overall frame. At the same time, the connection nodes between the circumferential support component 4 and the ring body are deliberately positioned in the circumferential direction at a position offset from the joint of the curved fiberglass plate. This staggered layout avoids stress superposition at the structural joints, preventing structural tearing or fatigue damage caused by stress concentration. Thus, while significantly reducing steel consumption and achieving lightweight design, it ensures the overall rigidity and safety of the device.

[0027] When natural wind flows through this speed-increasing duct-type fan, the fiberglass duct 1, thanks to its excellent material rigidity, can withstand strong wind pressure without collapsing or significant deformation, maintaining its preset streamlined aerodynamic curvature and ensuring a stable acceleration effect for the airflow as it passes through the impeller plane. This effectively solves the problems of air outlet deformation and decreased speed-increasing efficiency caused by insufficient rigidity of flexible membrane materials in the prior art.

[0028] The flexible material 5 located at the tail of the device is connected to the rearward extension of the outlet ring 3. Because the outlet ring 3 has sufficient rigidity, it provides a stable tensioning point for the flexible material 5, ensuring it remains taut throughout the installation process. During fan operation, the taut flexible material 5 smoothly guides the wake, further reducing the weight moment at the cantilever end and preventing the flexible tail fin from flapping or becoming unstable under airflow disturbances, thus ensuring the overall aerodynamic stability of the fan.

[0029] In summary, this device, through modular assembly, staggered truss support, and a rigid-flexible structural design, achieves lightweighting and convenient transportation and installation of large speed-increasing cylinders while effectively ensuring the shape retention and structural strength of the duct, thus resolving the contradiction between excessive weight and poor wind deformation resistance in traditional technologies.

[0030] The above are merely specific embodiments of this utility model, but the technical features of this utility model are not limited thereto. Any simple changes, equivalent substitutions, or modifications made based on this utility model to solve essentially the same technical problems and achieve essentially the same technical effects are all covered within the protection scope of this utility model.

Claims

1. A fiberglass speed-increasing duct type fan, comprising a fiberglass duct (1), characterized in that: It also includes an air inlet ring (2) at the air inlet end of the fiberglass duct (1), an air outlet ring (3) at the air outlet end of the fiberglass duct (1), and a circumferential support assembly (4) connecting the air inlet ring (2) and the air outlet ring (3) to provide structural rigidity; the fiberglass duct (1) is formed by splicing several sections of arc-shaped fiberglass plates of the same specifications from end to end along the circumference to form a circular cylindrical structure, and the two ends of the arc-shaped fiberglass plates are respectively fixed to the air inlet ring (2) and the air outlet ring (3) by bolts; the circumferential support assembly (4) is in the form of an M-shaped continuous broken line structure connected between the air inlet ring (2) and the air outlet ring (3), and the connection nodes of the circumferential support assembly (4) and the air inlet and outlet rings are staggered from the splicing seam between the arc-shaped fiberglass plates in the circumferential direction.

2. The fiberglass speed-increasing tube-type fan according to claim 1, characterized in that: The air inlet ring (2) is formed by splicing together at least two sections of first arc-shaped round tubes, and the ends of adjacent first arc-shaped round tubes are fixed together by bolts to form a ring; the air outlet ring (3) is formed by splicing together at least two sections of second arc-shaped round tubes, and the ends of adjacent second arc-shaped round tubes are fixed together by bolts to form a ring.

3. The fiberglass speed-increasing tube-type fan according to claim 1, characterized in that: The circumferential support assembly (4) includes several support tubes, which are evenly distributed circumferentially. The two ends of each support tube are alternately inclined and connected to the air inlet ring (2) and the air outlet ring (3) to form a triangular truss support structure between the air inlet ring (2) and the air outlet ring (3).

4. A fiberglass speed-increasing tube-type fan according to claim 1, characterized in that: The air outlet ring (3) has an extension section that extends rearward along the axial direction, and a flexible material (5) is connected to the extension section. The flexible material (5) is in a tensioned state after installation to maintain the curvature of the air outlet.

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