An impeller assembly for a wind turbine

Abstract

This utility model discloses an impeller device for a fan, relating to the field of FRP (fiberglass reinforced plastic) fan technology. The impeller device includes a rear chassis, multiple blades, and a front chassis. The blades are fixed to the rear chassis with bolts. The upper surface of the rear chassis has several bolt holes. The front chassis is connected to the rear chassis via connecting columns. The front chassis is located above the blades and provides additional fixation for them. This utility model uses bolts to fix the blades to the rear chassis, forming a modular design that facilitates subsequent replacement and maintenance. Simultaneously, the front and rear chassis are fixedly connected by connecting columns, and a groove is provided on the lower surface of the front chassis to securely embed the upper end of the blades, forming a double-fixation structure for the blades, effectively improving the stability of the blades under high-speed rotation.

Description

Technical Field

[0001] This utility model relates to the field of fiberglass fan technology, and in particular to an impeller device for a fan. Background Technology

[0002] As a key component widely used in industrial equipment, FRP fans have impellers that directly bear the effects of high-speed airflow and centrifugal force during operation, thus placing high demands on structural strength, stability, and smooth operation.

[0003] Traditional wind turbine blades are mostly fixed to the chassis by integral welding or single bolt connection. Although this structure is simple, it is prone to problems such as blade loosening, displacement or even falling off during long-term operation. Especially under high speed or large vibration conditions, it can easily cause equipment imbalance, increased noise or even safety accidents.

[0004] Furthermore, existing impeller structures often lack effective auxiliary fixing designs, resulting in weak connections between the blades and the chassis. These connections are prone to damage over long-term use, and the installation positioning accuracy is low, leading to vibration and noise during wind turbine operation, impacting equipment lifespan and the working environment. Additionally, traditional structures involve complex operations and inconvenient disassembly and assembly when maintaining and replacing blades, increasing maintenance costs and time. Utility Model Content

[0005] This utility model provides an impeller device for a wind turbine, including a rear chassis, multiple blades and a front chassis. The blades are fixed to the rear chassis by bolts. The upper surface of the rear chassis has several bolt holes. The front chassis is connected to the rear chassis by a connecting column. The front chassis is located on the upper side of the blades and provides additional fixation for the blades.

[0006] Preferably, the lower surface of the front chassis is provided with a slot, and the upper end of the blade is engaged in the slot.

[0007] Preferably, a center plate is provided at the center of the front chassis, and air inlets are distributed on the center plate. The center plate is fixed to the upper end of the connecting column by bolts, and the upper end of the connecting column has several bolt holes.

[0008] Preferably, an outer plate is provided on the lower side of the rear chassis, and multiple insertion holes are provided around the outer plate. Reinforcing rods are inserted into the insertion holes and fixed by bolts.

[0009] Preferably, the other end of the reinforcing rod is provided with a U-shaped head, and an elastic pad is provided inside the U-shaped head, which is engaged with the root of the blade.

[0010] Preferably, a positioning pin is provided at the root of the blade, and the positioning pin is engaged with a positioning hole opened on the upper surface of the rear chassis.

[0011] Preferably, both bolt hole one and bolt hole two are coated with a wear-resistant coating to reduce friction and wear between the bolt and the hole wall.

[0012] Preferably, the blade surface is provided with micropores, and the micropores are filled with sound-absorbing material.

[0013] Preferably, the blade surface is coated with a self-cleaning coating.

[0014] Preferably, the connecting column is made of high-strength aluminum alloy and has a reinforcing rib structure inside.

[0015] This utility model provides an impeller device for a fan, which, compared with the prior art:

[0016] 1. This utility model uses bolts to fix the blades to the rear chassis, forming a modular design that facilitates subsequent replacement and maintenance. At the same time, the front chassis and the rear chassis are fixedly connected by connecting columns, and a slot is opened on the lower surface of the front chassis to firmly embed the upper end of the blade, forming a double fixing structure for the blade, which effectively improves the stability of the blade under high-speed rotation.

[0017] 2. The reinforcing rod of this utility model is clamped to the root of the blade by a U-shaped head and an elastic pad, which further enhances the connection strength and shock resistance between the blade and the chassis. At the same time, it helps to fix the blade and enhances the stability of the blade. In addition, the plug-in design of the positioning pin and the positioning hole ensures the accuracy of the blade installation position and avoids vibration and imbalance caused by deviation during operation. Attached Figure Description

[0018] 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 of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model;

[0020] Figure 2 This is a second schematic diagram of the overall structure of an embodiment of the present utility model;

[0021] Figure 3 This is a perspective view of the overall structure of an embodiment of the present utility model;

[0022] Figure 4 This is an exploded view of the overall structure of an embodiment of the present utility model;

[0023] Figure 5 This is a schematic diagram of the blade structure according to an embodiment of the present invention;

[0024] Figure 6 This is a schematic diagram of the front chassis structure of an embodiment of the present utility model;

[0025] Figure 7 This is a cross-sectional schematic diagram of the connecting column structure according to an embodiment of the present utility model;

[0026] Figure 8 This is a schematic diagram showing the disassembled structure of the external plate, reinforcing rod, etc., in an embodiment of this utility model.

[0027] Figure label:

[0028] 1. Rear chassis; 2. Blade; 3. Front chassis; 4. Center plate; 5. Outer plate; 6. Positioning hole; 7. Connecting post; 8. Bolt hole one; 9. Micro-hole; 10. Positioning pin; 11. Insertion hole; 12. Reinforcing rod; 13. Elastic pad; 14. Slot; 15. Bolt hole two. Detailed Implementation

[0029] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0030] Please refer to Figures 1-8 This utility model provides an impeller device for a fan, including a rear chassis 1, multiple blades 2, and a front chassis 3. The blades 2 are fixedly mounted on the upper surface of the rear chassis 1 by bolts. Multiple bolt holes 15 are provided on the rear chassis 1, and the blades 2 are securely connected by bolts that mate with the bolt holes 15, thereby reliably fixing the blades 2 to the rear chassis 1.

[0031] Furthermore, the front chassis 3 is connected to the rear chassis 1 via a connecting column 7 and is located in the upper region of the blades 2 to provide additional support and fixation for the blades 2, enhancing their stability under high-speed rotation. A central disc 4 is located at the center of the front chassis 3, and an air inlet is provided on the central disc 4 to guide airflow into the fan. The central disc 4 is fixedly connected to the upper end of the connecting column 7 by bolts. The top of the connecting column 7 has several bolt holes 8, and the front chassis 3 is securely installed through the threaded engagement of the bolts with these bolt holes 8.

[0032] To improve the durability and service life of the connection parts, the inner walls of bolt hole 8 and bolt hole 15 are coated with a wear-resistant coating, which effectively reduces friction and wear between the bolt and the hole wall, reduces the risk of loosening caused by long-term operation, and thus improves the stability and reliability of the entire impeller device under complex working conditions.

[0033] The connecting column 7 is made of high-strength aluminum alloy, which has good mechanical properties and fatigue resistance, and can effectively support the connection structure between the front chassis 3 and the rear chassis 1. Furthermore, a reinforcing rib structure is set inside the connecting column 7 to improve its overall strength and torsional resistance, thereby enhancing the structural stability of the impeller device under high-speed rotation.

[0034] The lower surface of the front chassis 3 is provided with a slot 14, and the upper end of the blade 2 is embedded and locked in the slot 14 to form an auxiliary fixing structure for the blade 2, which helps to improve the vibration resistance and overall rigidity of the blade 2 during operation.

[0035] A positioning pin 10 is provided at the root of the blade 2. The positioning pin 10 is engaged with the positioning hole 6 opened on the upper surface of the rear chassis 1 to achieve precise positioning of the blade 2 installation position and prevent offset and imbalance caused by installation deviation or running vibration.

[0036] To further optimize the working environment of the wind turbine, the surface of blade 2 is coated with a self-cleaning coating to reduce the adhesion of dust and contaminants, improve aerodynamic efficiency, and reduce maintenance frequency. Simultaneously, the surface of blade 2 also features a microporous structure 9, filled with sound-absorbing material to absorb aerodynamic noise generated during wind turbine operation, achieving noise reduction and improving the noise level of the surrounding environment.

[0037] In addition, an external connecting plate 5 is fixedly connected to the lower side of the rear chassis 1. The external connecting plate 5 has multiple insertion holes 11 evenly distributed around its circumference. One end of the reinforcing rod 12 is inserted into the insertion hole 11 and fixedly connected by bolts to enhance the structural strength of the entire impeller assembly.

[0038] The other end of the reinforcing rod 12 is provided with a U-shaped head, and an elastic pad 13 is provided inside the U-shaped head. The U-shaped head is engaged with the root area of ​​the blade 2 through the elastic pad 13, thereby forming an external auxiliary support for the blade 2 and further improving the stability and seismic resistance of the blade 2 under complex working conditions.

[0039] In summary, the working principle of the impeller device for a wind turbine according to this utility model embodiment is as follows: First, multiple blades 2 are modularly installed and fixed through bolt holes 15 on the rear chassis 1, and the positioning pins 10 at the root of the blades 2 are engaged with the positioning holes 6 on the upper surface of the rear chassis 1 to achieve rapid and accurate positioning, ensuring the consistency of blade installation and operational stability; then, the front chassis 3 is connected to the rear chassis 1 through connecting columns 7, and the central disk 4 at the center of the front chassis 3 is fixedly connected to the bolt hole 8 at the upper end of the connecting column 7 by bolts, thus reinforcing the structure. While ensuring reliability, it guides airflow into the fan. The lower surface of the front chassis 3 is provided with a slot 14, and the upper end of the blade 2 is embedded in the slot 14 to form an auxiliary fixation for the blade 2. In addition, the outer plate 5 provided on the lower side of the rear chassis 1 has multiple insertion holes 11 for inserting the reinforcing rod 12 and fixing it with bolts. The other end of the reinforcing rod 12 is provided with a U-shaped head with an elastic pad 13, which is snapped into the root area of ​​the blade 2 to form an external auxiliary support structure, thereby significantly enhancing the stability of the entire impeller device under complex working conditions and ensuring that the fan operates efficiently, quietly, and safely for a long time.

[0040] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. An impeller arrangement for a fan, characterised in that: It includes a rear chassis (1), multiple blades (2) and a front chassis (3). The blades (2) are fixed to the rear chassis (1) by bolts. The upper surface of the rear chassis (1) has several bolt holes (15). The front chassis (3) is connected to the rear chassis (1) by a connecting column (7). The front chassis (3) is located on the upper side of the blades (2) and provides additional fixation for the blades (2).

2. Impeller device for a fan according to claim 1, characterized in that: The lower surface of the front chassis (3) is provided with a slot (14), and the upper end of the blade (2) is engaged in the slot (14).

3. Impeller device for a fan according to claim 2, characterized in that: A central plate (4) is provided at the center of the front chassis (3). Air inlets are distributed on the central plate (4). The central plate (4) is fixed to the upper end of the connecting column (7) by bolts. Several bolt holes (8) are opened at the upper end of the connecting column (7).

4. Impeller device for a fan according to claim 3, characterized in that: An external plate (5) is provided on the lower side of the rear chassis (1). Multiple insertion holes (11) are provided around the external plate (5). A reinforcing rod (12) is inserted into the insertion hole (11) and fixed by bolts.

5. Impeller device for a fan according to claim 4, characterized in that: The other end of the reinforcing rod (12) is provided with a U-shaped head, and an elastic pad (13) is provided inside the U-shaped head. The U-shaped head is snapped into the root of the blade (2).

6. The impeller arrangement for a fan of claim 1, wherein: The root of the blade (2) is provided with a positioning pin (10), which is engaged with the positioning hole (6) opened on the upper surface of the rear chassis (1).

7. The impeller arrangement for a fan of claim 3, wherein: Both bolt hole one (8) and bolt hole two (15) are coated with a wear-resistant coating to reduce friction and wear between the bolt and the hole wall.

8. The impeller arrangement for a fan of claim 1, wherein: The blade (2) has micropores (9) on its surface, and the micropores (9) are filled with sound-absorbing material.

9. Impeller device for a fan according to claim 8, characterized in that: The blade (2) is coated with a self-cleaning coating.

10. The impeller device for a fan according to claim 3, characterized in that: The connecting column (7) is made of high-strength aluminum alloy material, and a reinforcing rib structure is provided inside the connecting column (7).

Images