Low-noise fan
By employing a serrated owl wing structure and a rectifier blade design in the wind turbine, combined with components such as rotary drive components and support frames, the problems of high wind turbine noise and poor aerodynamic performance have been solved, achieving low-noise and high-efficiency wind turbine operation.
Patent Information
- Application Number
- CN202520431472.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-01-13
- Estimated Expiration
- 2035-03-12
AI Technical Summary
Existing industrial fans have high noise levels and poor aerodynamic performance, making it difficult to achieve low-noise operation while ensuring high efficiency.
The biomimetic design of the propeller blade trailing edge structure is a serrated owl wing structure, which, combined with the rectifier leading edge structure, optimizes airflow to reduce noise. Through the cooperation of components such as rotating drive components, support frame, stator blades and protective net, aerodynamic performance and stability are improved.
Significantly reduces fan operating noise, improves aerodynamic performance and energy efficiency, and meets the requirements for low noise and high efficiency.
Smart Images
Figure CN223794385U_ABST
Abstract
Description
Technical Field
[0001] This application belongs to the field of wind turbine technology, and more specifically, relates to a low-noise wind turbine. Background Technology
[0002] When operating large industrial equipment or systems, fan systems are essential for ventilation and heat dissipation. However, these systems generate significant noise, which can negatively impact worker health and potentially damage machinery due to vibration. As the problem of fan noise becomes increasingly serious, public awareness of noise hazards is also rising, making the use of low-noise fans in production processes a fundamental requirement.
[0003] Currently, the design of industrial-grade fans mainly focuses on traditional methods such as forward-swept and twisted blades. While these design methods have improved fan performance to some extent, they still have some significant drawbacks. First, the noise levels of these fans remain high, failing to meet increasingly stringent noise control requirements. Second, the aerodynamic performance of existing fans still has considerable room for optimization, making it difficult to achieve low-noise operation while ensuring high efficiency. Furthermore, existing fan designs lack innovation and do not fully utilize structures that have undergone long-term evolution and optimization in nature. These problems make it difficult for existing fans to achieve a good balance between noise control, aerodynamic performance, and energy efficiency.
[0004] To address the aforementioned issues, existing technologies urgently need improvement. Utility Model Content
[0005] The purpose of this application is to provide a low-noise fan to solve the technical problems of high fan noise, poor aerodynamic performance and low energy efficiency in the prior art.
[0006] To achieve the above objectives, the technical solution adopted in this application is as follows: a low-noise fan is provided, including a fan frame and a rotor impeller, wherein the rotor impeller is rotatably installed within the fan frame; the rotor impeller includes rotor blades; the trailing edge structure of the rotor blades is a serrated owl wing structure; and the leading edge structure of the rotor blades is a rectifier blade structure.
[0007] Furthermore, the included angle of the serrated tips of the trailing edge structure of the moving blade is 30-45°.
[0008] Furthermore, the groove depth of the trailing edge structure of the moving blade is greater than the groove width.
[0009] Furthermore, the serrations of the trailing edge structure of the moving blade are triangular in shape.
[0010] Furthermore, the serrations of the trailing edge structure of the moving blade extend radially from the root of the moving blade to the tip of the moving blade along the moving impeller.
[0011] Furthermore, the moving impeller also includes a blade holder, which is rotatably mounted within the fan frame; the moving blades are mounted on the blade holder; there are multiple moving blades, which are arranged along the circumferential spacing of the moving impeller.
[0012] Furthermore, the low-noise fan also includes a rotary drive component, which is mounted on the fan frame, and the output end of the rotary drive component is connected to the blade holder.
[0013] Furthermore, the low-noise fan also includes a support frame, which is mounted on the fan frame and is used to support the rotary drive component.
[0014] Furthermore, the low-noise fan also includes stator blades, which are fixedly mounted on the fan frame.
[0015] Furthermore, the low-noise fan also includes a protective net, which is installed at the air outlet end of the fan frame.
[0016] The beneficial effects of the low-noise fan provided in this application are as follows: Compared with the prior art, in this application, the fan frame provides the basic structural support for the fan, ensuring the stable operation of the rotor impeller. The rotor impeller, as the core component of the fan, generates airflow through rotation. The trailing edge structure of the rotor blades adopts a serrated owl wing structure; this biomimetic design effectively reduces the noise generated by the fan during operation. The leading edge structure of the rotor blades is a rectifier structure; the rectifier optimizes airflow and reduces eddies and aerodynamic noise. Through the synergy of these technical features, the fan can significantly reduce operating noise while maintaining good aerodynamic performance. Attached Figure Description
[0017] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0018] Figure 1 This is a schematic diagram of the main structure of a low-noise fan provided in an embodiment of this application;
[0019] Figure 2 A side view of the low-noise fan provided in an embodiment of this application;
[0020] Figure 3 This is a schematic diagram of the moving blades in a low-noise fan provided in an embodiment of this application.
[0021] The following are the labeling elements in the figure:
[0022] 10-Wind turbine frame; 21-Motor blade; 211-Tail edge structure; 212-Leading edge structure; 22-Blade holder; 31-Rotation drive component; 32-Support frame. Detailed Implementation
[0023] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.
[0024] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.
[0025] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.
[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.
[0027] Please refer to the following: Figure 1 and Figure 3 The low-noise fan provided in the embodiments of this application will now be described. The low-noise fan includes a fan frame 10 and a mover impeller, which is rotatably installed in the fan frame 10; the mover impeller includes mover blades 21; the trailing edge structure 211 of the mover blades 21 is a serrated owl wing structure; the leading edge structure 212 of the mover blades 21 is a rectifier structure.
[0028] Compared with the prior art, the low-noise fan provided in this embodiment provides a fan frame 10 that provides basic structural support for the fan, ensuring stable operation of the rotor impeller. The rotor impeller, as the core component of the fan, generates airflow through rotation. The trailing edge structure 211 of the rotor blade 21 adopts a serrated owl wing structure; this biomimetic design effectively reduces the noise generated by the fan during operation. The leading edge structure 212 of the rotor blade 21 is a rectifier structure, which optimizes airflow and reduces eddies and aerodynamic noise. Through the combined effect of these technical features, the fan can significantly reduce operating noise while maintaining good aerodynamic performance.
[0029] Specifically, the trailing edge structure 211 of the mover blade 21 is a serrated owl wing structure, which can promote the mixing of airflow between the pressure and suction surfaces of the mover blade 21, suppress the shedding of laminar boundary vortices at the trailing edge, and significantly reduce airfoil lift pulsation. Furthermore, the serrated owl wing structure can reduce the intensity of low-frequency turbulent pulsation and the amplitude of airfoil surface pressure pulsation near the trailing edge, and change the phase of airfoil surface pressure pulsation near the trailing edge. Simultaneously, the serrated owl wing structure is also beneficial to the vortex intensity near the trailing edge and can effectively reduce the spanwise correlation of vortices at the trailing edge. The combined effect of these factors reduces the self-noise of the mover blade 21. The serrated owl-wing structure primarily affects the flow structure near the trailing edge of the mover blade 21, while having a smaller impact on the flow field upstream of the mover blade. Therefore, the trailing edge serrations have a relatively small impact on aerodynamic performance. Simultaneously, the leading edge structure 212 of the mover blade 21, being a rectifier structure, further enhances the aerodynamic performance of the mover blade 21. These two elements work together to achieve a balance between aerodynamic performance optimization and self-noise reduction.
[0030] In one embodiment of this application, please refer to Figure 3 The included angle A of the serrated tooth tip of the trailing edge structure 211 of the moving blade 21 is 30-45°.
[0031] In this embodiment, the included angle A of the serrations at the trailing edge structure 211 of the mover blade 21 is 30-45°. This feature, by optimizing the serration structure of the trailing edge of the mover blade 21, can effectively reduce the noise generated during wind turbine operation. The included angle of the serrations within the range of 30-45° helps to reduce airflow separation and vortex generation while ensuring the strength of the mover blade 21, thereby reducing noise.
[0032] In this embodiment, the serration tip angle of the trailing edge structure 211 of the mover blade 21 is 30-45°, which can be achieved in various ways. For example, the trailing edge of the blade can be machined using precision manufacturing processes to form the required serrated shape. Specifically, this structure can be achieved using processes such as laser cutting, precision casting, or CNC machining. In addition, biomimetic design can be used, drawing inspiration from the structural characteristics of an owl's wing, to further optimize the serrated shape and angle to achieve better noise reduction.
[0033] This application effectively solves the noise problem generated during fan operation by setting the serrated tooth tip angle of the trailing edge structure 211 of the mover blade 21 to 30-45°. Compared with the prior art, the technical solution of this application significantly reduces airflow separation and vortex generation while ensuring the strength of the mover blade 21, thereby reducing noise. This innovative design not only improves the overall performance of the fan but also meets the demand for low-noise fans.
[0034] In one embodiment of this application, please refer to Figure 3 The groove depth H of the trailing edge structure 211 of the moving blade 21 is greater than the groove width h.
[0035] In this embodiment, the groove depth H of the trailing edge structure 211 of the mover blade 21 is greater than the groove width h. This design helps to reduce eddies and noise when airflow passes through the trailing edge. The design that the groove depth is greater than the groove width can effectively disperse the airflow and reduce airflow turbulence and noise generation.
[0036] In this embodiment, the design where the groove depth is greater than the groove width can be achieved in several ways. For example, the trailing edge of the mover blade 21 with this structural feature can be manufactured using precision mold processing technology, or the required grooves can be formed on the trailing edge of the blade using laser cutting technology. Furthermore, blades with complex groove structures can also be directly manufactured using additive manufacturing technology (3D printing). Specifically, the depth and width of the grooves can be adjusted according to actual application requirements to achieve the best noise reduction effect.
[0037] In this embodiment, by employing a design where the tooth groove depth is greater than the tooth groove width, this application effectively solves the noise problem caused by the trailing edge structure 211 of the wind turbine blades in the prior art. Compared with the traditional forward-swept and twisted blade design, this design can better disperse airflow and reduce the generation of vortices, thereby significantly reducing the noise level during wind turbine operation. Thus, this application further improves the aerodynamic performance and user comfort of the wind turbine while meeting ventilation and heat dissipation requirements.
[0038] In one embodiment of this application, please refer to the following: Figure 1 and Figure 3The trailing edge structure 211 of the moving blade 21 has a triangular serrated shape.
[0039] In this embodiment, the trailing edge structure 211 of the mover blade 21 is designed in a triangular serrated shape. This special structural design can effectively reduce airflow separation and turbulence, thereby reducing the noise generated by the fan during operation. By optimizing the trailing edge structure 211 of the mover blade 21, the fan can significantly reduce noise pollution while maintaining good aerodynamic performance, thus improving the overall performance and environmental friendliness of the fan.
[0040] In this embodiment, the trailing edge structure 211 of the moving blade 21 has a triangular serrated shape. This design can be achieved in various ways. For example, the tooth tips can be designed as equilateral or scalene triangles, and the tooth height and width can be adjusted according to specific needs to optimize aerodynamic performance and noise control. Furthermore, the arrangement of the serrations can also be optimized according to the specific application scenario of the fan, such as uniform or non-uniform radial distribution, to achieve the best noise reduction effect.
[0041] This application effectively solves the problem of high fan noise in the prior art by designing the trailing edge structure 211 of the mover blade 21 into a triangular sawtooth shape. Compared with the traditional forward-swept and twisted blade design, the design of this application can significantly reduce airflow separation and turbulence, thereby reducing noise pollution. At the same time, the aerodynamic performance of the mover blade 21 is optimized, improving the overall performance and environmental friendliness of the fan. Thus, this application improves the operating efficiency and reliability of the fan while reducing fan noise.
[0042] In one embodiment of this application, the serrations of the trailing edge structure 211 of the mover blade 21 extend radially from the root of the mover blade 21 to the end of the mover blade 21 along the radial direction of the mover impeller.
[0043] In this embodiment, the radially extending serrations of the trailing edge structure 211 of the mover blade 21 effectively reduces noise during wind turbine operation. By extending the serrated structure radially, the airflow distribution can be optimized, reducing the generation of eddies and thus lowering noise.
[0044] In this embodiment, the serrated design of the trailing edge structure 211 of the mover blade 21 can be implemented in various ways. For example, the shape of the serrations can be triangular, trapezoidal, or other suitable geometric shapes. The size and spacing of the serrations can be adjusted according to specific application requirements to achieve the best noise reduction effect. The material selection of the serrations can also be optimized according to the working environment of the wind turbine, for example, using wear-resistant and corrosion-resistant materials to extend the service life of the mover blade 21.
[0045] This application designs serrations on the trailing edge structure 211 of the mover blade 21, extending radially from the root of the mover blade 21 to its tip. Compared with the prior art, this design can significantly reduce the noise during wind turbine operation, optimize airflow distribution, and reduce the generation of eddies, thereby improving the overall performance and operating efficiency of the wind turbine.
[0046] In one embodiment of this application, please refer to Figure 1 The moving impeller also includes a blade holder 22, which is rotatably mounted inside the fan frame 10; the moving blades 21 are mounted on the blade holder 22; there are multiple moving blades 21, which are arranged along the circumferential spacing of the moving impeller.
[0047] In this embodiment, the mover impeller includes a blade holder 22, which is rotatably mounted within the fan frame 10 to ensure the stability of the mover impeller. Mover blades 21 are mounted on the blade holder 22, and multiple mover blades 21 are arranged along the circumferential spacing of the mover impeller. This design ensures the uniform distribution of the mover blades 21, thereby improving the overall operational stability and efficiency of the fan.
[0048] In this embodiment, the blade holder 22 can be implemented in various ways. For example, the blade holder 22 can be made of high-strength metal material to ensure its stability and durability under high load operation. The installation method of the blade holder 22 can also be diversified. For example, a bearing structure can be used to achieve its rotatable installation within the wind turbine frame 10, thereby reducing friction and wear. The mover blades 21 can be installed by bolting or welding to ensure they are firmly installed on the blade holder 22. The number and spacing of the mover blades 21 can be adjusted according to specific design requirements to achieve optimal aerodynamic performance and noise control.
[0049] This application solves the problems of stability and uniformity of the rotor impeller blades by adding a blade holder 22 to the rotor impeller and mounting the rotor blades 21 on the blade holder 22. Compared with the prior art, the technical solution of this application improves the overall operational stability and efficiency of the fan and reduces noise and vibration through the uniform distribution of the rotor blades 21 and the stable support of the blade holder 22, thereby improving the performance and service life of the fan.
[0050] In one embodiment of this application, please refer to Figure 2 The low-noise fan also includes a rotary drive 31, which is mounted on the fan frame 10 and whose output end is connected to the blade holder 22.
[0051] In this embodiment, the rotary drive component 31 provides rotational power, enabling the blade holder 22 to drive the rotor blades 21 to rotate, thereby realizing the operation of the fan. This design solves the rotational drive problem of low-noise fans, ensuring efficient operation while maintaining low noise characteristics.
[0052] In this embodiment, the rotary drive component 31 can be implemented in various ways, such as an electric motor, a turbine, or other devices capable of providing rotational power. The electric motor can drive the blade holder 22 to rotate using electrical energy, while the turbine can drive the blade holder 22 to rotate using hydrodynamic power. Specifically, the electric motor can be installed outside the wind turbine frame 10 and connected to the blade holder 22 via a drive shaft; the turbine can be installed inside the wind turbine frame 10 and connected to the blade holder 22 via a fluid pipe. As a preferred embodiment, the installation position and transmission method of the electric motor can be adjusted according to the specific design of the wind turbine to achieve optimal operating performance.
[0053] This application effectively solves the rotation drive problem of existing low-noise fans by introducing a rotary drive component 31 into the low-noise fan. Compared with the prior art, the low-noise fan of this application can achieve stable and efficient operation while maintaining low noise characteristics. Therefore, this application provides a more optimized low-noise fan design, meeting the needs of industrial equipment for low-noise and high-efficiency fans.
[0054] In one embodiment of this application, please refer to Figure 2 The low-noise fan also includes a support frame 32, which is mounted on the fan frame 10 and is used to support the rotary drive component 31.
[0055] In this embodiment, the support frame 32 provides a stable support structure to ensure that the rotary drive component 31 remains stable during operation, thereby reducing vibration and noise. By adding the support frame 32, the support problem of the rotary drive component 31 during operation is solved, ensuring the stable operation of the rotary drive component 31, reducing noise caused by vibration and damage to mechanical equipment, and improving the overall performance of the fan.
[0056] In this embodiment, the support frame 32 can be made of various materials and structural forms, such as a metal frame structure or a composite material structure, to provide sufficient strength and stability. The support frame 32 can be fixed to the wind turbine frame 10 by welding, bolting, or other methods to ensure that it will not shift or deform during wind turbine operation. Furthermore, the design of the support frame 32 can be optimized according to the specific shape and installation position of the rotary drive component 31 to provide the best support effect.
[0057] This application effectively solves the support problem of the rotary drive component 31 during operation by adding a support frame 32, ensuring the stable operation of the rotary drive component 31 and reducing noise and damage to mechanical equipment caused by vibration. Compared with the prior art, the design of this application improves the overall performance of the fan, especially in terms of noise reduction and extended equipment life.
[0058] In one embodiment of this application, the low-noise fan also includes stator blades (not shown), which are fixedly mounted on the fan frame 10.
[0059] In this embodiment, the stator blades reduce noise by altering the airflow path and reducing eddies. The stator blade design effectively reduces noise generated during fan operation, thereby improving the overall performance of the fan and the comfort of the user environment.
[0060] In this embodiment, the stator blades can be manufactured from various materials, such as metals, composite materials, or high-strength plastics, to ensure durability and stability in various environments. The shape and arrangement of the stator blades can be optimized according to specific applications to minimize noise. Specifically, the number, angle, and length of the stator blades can be adjusted according to the size and operating conditions of the fan. For example, the stator blades can be set at a certain tilt angle to more effectively guide airflow and reduce turbulence. In addition, the surface of the stator blades can be specially treated, such as coated with sound-absorbing materials, to further reduce noise.
[0061] In this embodiment, by adding stator blades, the noise problem generated during the operation of the fan is effectively solved. Compared with the prior art, the technical solution of this application can significantly reduce the noise during fan operation, improve the overall performance of the fan and the comfort of the user environment. This improvement not only increases the working efficiency of the fan, but also reduces noise pollution to the surrounding environment, thereby meeting the demand for low-noise fans.
[0062] In one embodiment of this application, the low-noise fan also includes a protective net (not shown), which is installed at the air outlet end of the fan frame 10.
[0063] In this embodiment, the low-noise fan reduces noise and improves the safety of fan operation by installing a protective net at the air outlet of the fan frame 10. The protective net reduces airflow disturbance, thereby reducing the noise generated by the fan during operation.
[0064] In this embodiment, the protective net can be made of metal mesh, plastic mesh, or other suitable materials. These materials must possess sufficient strength and durability to ensure they are not easily damaged during fan operation. The mesh size of the protective net should be appropriate, effectively blocking foreign objects from entering the fan without significantly affecting airflow. The protective net can be installed using bolt fixing, clip fixing, or other suitable installation methods to ensure its stability during fan operation.
[0065] In this embodiment, by installing a protective net at the air outlet of the fan frame 10, this application can effectively reduce the noise generated during fan operation, while improving the fan's safety and preventing foreign objects from entering the fan and causing damage. Compared with the prior art, the low-noise fan of this application has better noise reduction effect and higher safety.
[0066] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A low noise fan characterized by, The low-noise fan comprises: a fan frame; a rotor impeller, which is rotationally installed in the fan frame; the rotor impeller comprises rotor blades; the trailing edge structure of the rotor blade is a sawtoothed owl wing structure; the leading edge structure of the rotor blade is a fairing structure.
2. The low noise blower of claim 1 wherein, The included angle of the sawtoothed tip of the trailing edge structure of the rotor blade is 30-45°.
3. The low noise blower of claim 1 wherein, The depth of the tooth groove of the trailing edge structure of the rotor blade is greater than the width of the tooth groove.
4. The low noise blower of claim 1 wherein, The sawtooth shape of the trailing edge structure of the rotor blade is triangular.
5. The low noise blower of claim 1 wherein, The sawtooth of the trailing edge structure of the rotor blade extends along the radial direction of the rotor impeller from the root of the rotor blade to the end of the rotor blade.
6. The low noise blower of claim 1 wherein, The rotor impeller further comprises a blade fixing frame, which is rotationally installed in the fan frame; the rotor blades are installed on the blade fixing frame; a plurality of rotor blades are provided along the circumferential direction of the rotor impeller.
7. The low noise fan of claim 6 wherein, The low-noise fan further comprises a rotary driving member, which is installed on the fan frame; the output end of the rotary driving member is connected with the blade fixing frame.
8. The low noise fan of claim 7, wherein, The low-noise fan further comprises a support frame, which is installed on the fan frame; the support frame is used for supporting the rotary driving member.
9. The low noise blower of claim 1 wherein, The low-noise fan further comprises a stator blade, which is fixedly installed on the fan frame.
10. A low noise fan as claimed in any one of claims 1 to 9, wherein, The low-noise fan further comprises a protective net, which is installed at the air outlet end of the fan frame.