Efficient light-weight fan impeller
By setting grooves and serrated trailing edges on the impeller, and combining the air inlet ring with the impeller to rotate synchronously, the airflow is optimized, solving the problems of vortex leakage, high noise and high energy consumption of existing impellers, and achieving lightweight and efficient operation.
Patent Information
- Application Number
- CN202520774328.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-02-10
- Estimated Expiration
- 2035-04-23
AI Technical Summary
Existing wind turbine impellers suffer from problems such as eddy current leakage, high noise, and high energy consumption during operation, and the heavy blades result in high motor load.
A high-efficiency, lightweight fan impeller was designed. By setting grooves and serrated trailing edges on the blades, and combining them with the air inlet ring rotating synchronously with the impeller, eddies and turbulence are reduced, airflow is optimized, and energy loss is reduced. The air inlet ring also provides initial guidance and sorting of the airflow, reducing airflow turbulence.
It reduces impeller noise and power consumption, improves fan efficiency and stability, reduces impeller mass, reduces motor load, and enhances airflow intake capacity and intake efficiency.
Smart Images
Figure CN223894517U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of motor technology, specifically to a high-efficiency and lightweight fan impeller. Background Technology
[0002] A fan is a general-purpose mechanical device that converts mechanical energy into gas energy and enables the directional transport of gas. It is widely used in various fields such as industry, construction, agriculture, transportation, and energy. Based on their working principle, fans can be classified into positive displacement, turbine, and jet types; according to their application, they can be classified into industrial boiler fans, tunnel fans, and general exhaust fans; and according to the airflow direction, they can be classified into centrifugal fans, axial flow fans, and mixed flow fans. In the industrial field, fans are used for ventilation, dust removal, and cooling.
[0003] Modern fans feature an integrated design of the air inlet and support frame, with the impeller and air inlet separated. If there is a gap between the air inlet and the impeller, during impeller operation, the pressure difference between the upper and lower surfaces of the blades will generate eddies through the gap, causing leakage, unnecessary losses, and additional noise. Furthermore, modern impellers are designed with smooth curved surfaces, and the blades are thickened for robustness, resulting in heavier blades and higher motor energy consumption. Utility Model Content
[0004] To address the aforementioned problems in the existing technology, this utility model provides a high-efficiency and lightweight fan impeller, which has the advantages of reducing impeller noise and power consumption.
[0005] To achieve the above-mentioned goals of reducing impeller noise and power consumption, this utility model provides the following technical solution: including an impeller installed on a fan, the impeller including a fan hub, blades and an air inlet ring, the blades being fixed to the outer periphery of the fan hub, the end of the blades being connected to the inner end face of the air inlet ring, a plurality of grooves being provided on one side end face of the blades, and a trailing edge being provided at one side edge of the blades.
[0006] Preferably, the air inlet ring replaces the air inlet of the fan body and is fixedly connected to the edge of the blades, with one side edge of the air inlet ring extending outwards.
[0007] Preferably, the fan impeller hub is hemispherical, the air inlet ring is disposed on the outer periphery of the blade, that is, the air inlet ring is fixedly installed on the fan impeller hub through the blade, the unfolded part of the air inlet ring is the air inlet, the surface of the air inlet is arc-shaped, a number of drip holes are also provided on the outer periphery of the fan impeller hub, the groove is a strip groove, and the tail edge is a serrated tail.
[0008] Preferably, the bottom of the strip groove is flat, the serrated tail is located on the tail side face of the blade along the airflow direction, and the size of the serrations increases sequentially from the inside to the outside.
[0009] Preferably, the bottom of the strip groove is sloped.
[0010] Preferably, the blades are either twisted or planar.
[0011] Preferably, the air inlet ring has a groove on the side near the fan impeller hub, the blade is located in the groove and is slidably connected to it, that is, the blade and the air inlet ring can rotate relative to each other.
[0012] Compared with the prior art, this utility model provides a high-efficiency and lightweight fan impeller, which has the following beneficial effects:
[0013] 1. This high-efficiency, lightweight fan impeller, through the design of strip grooves and serrated tails, can reduce eddies and turbulence in the wake, reduce energy loss of airflow, and improve fan efficiency. At the same time, the serrations on the blade trailing edge can change the distribution and frequency of the wake, reduce aerodynamic interference between adjacent blades, avoid vibration and noise caused by airflow interaction, and improve the overall aerodynamic performance and operational stability of the impeller. Moreover, while ensuring blade strength and rigidity, the strip groove design can appropriately reduce the weight of the blades, reduce the overall mass of the impeller, reduce the inertial force during rotation, and help reduce the load on the motor.
[0014] 2. This high-efficiency, lightweight fan impeller is directly mounted on the air inlet, allowing it to rotate synchronously with the impeller. When the impeller and air inlet rotate synchronously, the airflow can enter the impeller more directly and quickly, reducing energy loss during airflow transmission, enhancing the fan's ability to draw in airflow, and thus increasing the gas flow rate per unit time.
[0015] 3. This high-efficiency, lightweight fan impeller, through the design of the inlet ring, can initially guide and streamline the airflow entering the impeller, allowing the airflow to flow more smoothly into the impeller, reducing airflow turbulence and eddy current generation, thereby improving the fan's intake efficiency, reducing intake losses, and ultimately enhancing the overall performance of the fan. Since the inlet ring is fixed to the impeller, it rotates synchronously with the impeller when it rotates, so there is no gap between the inlet ring and the impeller, which greatly reduces the pressure difference, thereby reducing eddy current generation and minimizing leakage and noise problems. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0017] Figure 2 This is a schematic diagram of the front structure of the present invention;
[0018] Figure 3 This is a schematic diagram of the structure where the curved surface of the blade of the present invention intersects with circles of different diameters;
[0019] Figure 4 This is a schematic diagram showing the length and elevation angle of the intersection line between the blade surface of the present invention and circles of different diameters;
[0020] Figure 5 This is a diagram showing the distribution of biomimetic serrations at the trailing edge of the present invention.
[0021] In the diagram: 10. Fan hub; 101. Blade; 1011. Slot; 1012. Serrated tail; 102. Air inlet ring; 103. Air inlet; 104. Drip hole. Detailed Implementation
[0022] 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. Example 1
[0023] like Figure 1-2 As shown, the impeller includes a fan impeller hub 10, with at least two blades 101 fixed on the outer periphery of the fan impeller hub 10. An air inlet ring 102 is fixed on the blades 101, which replaces the air inlet of the fan body. One side edge of the air inlet ring 102 is set outward, and the air inlet is directly set on the impeller so that it rotates synchronously with the impeller. When the impeller and the air inlet rotate synchronously, the airflow can enter the impeller more directly and quickly, reducing the energy loss of the airflow during transmission, enhancing the fan's ability to draw in airflow, and thus increasing the gas flow rate per unit time.
[0024] The fan blade hub 10 is also provided with several drip holes 104. For outdoor fans, the drip holes 104 on the middle sphere play an important protective role. In rainy or humid environments, rainwater or condensation may accumulate on the surface of the sphere. The presence of the drip holes 104 can drain this water in a timely manner, preventing water from staying on the surface of the sphere for a long time, and thus preventing water from seeping into the motor and causing damage such as short circuits and corrosion.
[0025] The impeller hub 10 can be hemispherical, and several drip holes 104 are provided on the outer periphery of the impeller hub 10. The surface of the blade 101 is curved. The curved surface of the impeller is formed by long-term flow field simulation and comprehensive consideration to form a unique curved surface structure, which has the advantages of higher efficiency and lower noise. Figure 3 and Figure 4 As shown, Figure 3 The impeller's rotation axis is used as the center to draw circles with diameters of 180mm, 240mm, 300mm, 360mm, and 410mm, which intersect the curved surface of the blades to produce intersection lines. Figure 4 Let the length and elevation angle of the cross section where the blade surface intersects with circles of different diameters be given. A line segment is drawn from the bottom to the top center of the cross section. A ray is drawn to the right from the left end of the line segment. The angle between the ray and the line segment is 10°-60°, and the length of the line segment is 60-500mm.
[0026] Several strip grooves 1011 are formed on the curved surface of the blade 101. These grooves 1011 are located on the back side of the blade, creating a special flow structure that promotes airflow within the boundary layer, delays boundary layer separation, and reduces eddy and turbulent losses on the blade's back side. This improves the blade's aerodynamic performance, allowing the fan to utilize airflow energy more effectively during operation. Furthermore, the grooves improve airflow conditions, reducing instability and turbulence, thus lowering noise caused by airflow impact and vibration, resulting in quieter fan operation and improved working environment comfort. While ensuring blade strength and rigidity, the design of the strip grooves 1011 can appropriately reduce blade weight, decrease the overall impeller mass, and reduce rotational inertial forces, helping to reduce motor load and improve fan energy efficiency. A serrated tail 1012 is also provided on one side edge of the blade 101. Specifically, the serrated tail 1012 is located at the tail of the blade 101 in the direction of rotation, and its specific structure is as follows... Figure 5 As shown, the three points of the triangular sawtooth are defined as a1, b1, and b2. Circles are drawn passing through these three points with the impeller rotation center as the center. The intersection of the circle passing through b1 and the line b1b2 is at the midpoint of line b1b2, i.e., B = 1 / 2A. The sawtooth width A ranges from 5-15mm, and the sawtooth depth H ranges from 5-25mm. Both the sawtooth width A and depth H change uniformly, meaning they gradually decrease from the air inlet 103 to the impeller hub 10. This sawtooth-shaped trailing edge can more effectively disperse the airflow at the trailing edge, reducing eddies and turbulence in the wake, lowering energy loss, and improving fan efficiency. Simultaneously, the sawtooth at the blade trailing edge can alter the wake distribution and frequency, reducing aerodynamic interference between adjacent blades, avoiding vibration and noise caused by airflow interaction, and improving the overall aerodynamic performance and operational stability of the impeller.
[0027] The air inlet ring 102 is located on the outer periphery of the blade 101, meaning that the air inlet ring 102 is fixedly mounted on the impeller hub 10 via the blade 101. The unfolded part of the air inlet ring 102 is the air inlet 103, and the surface of the air inlet 103 is arc-shaped. Through the setting of the air inlet ring 102, the airflow entering the impeller can be initially guided and sorted, so that the airflow flows into the impeller more smoothly, reducing airflow turbulence and eddy current generation, thereby improving the intake efficiency of the fan, reducing intake loss, and thus improving the overall performance of the fan. Since the air inlet ring 102 is fixed together with the impeller, the air inlet ring 102 rotates synchronously with the impeller when the impeller rotates. Therefore, there is no gap between the air inlet ring 102 and the impeller, which greatly reduces the pressure difference, thereby reducing the generation of eddy currents and reducing leakage and noise problems.
[0028] Furthermore, since the air inlet is fixedly connected to the impeller, the entire bracket does not contain an air inlet, thus reducing the overall thickness of the bracket, improving space utilization, and allowing it to adapt to more environments during installation.
[0029] The guide vane assembly and impeller are made of plastic, and their surfaces are coated with a protective coating. This coating blocks the corrosion of the plastic material by ultraviolet rays and oxygen, delays aging, maintains the mechanical properties and appearance integrity of the material, and extends its service life. At the same time, it enhances corrosion resistance in harsh environments, ensuring normal operation of the fan and improving its adaptability in complex environments. Furthermore, the coating reduces surface roughness, decreases frictional resistance between the airflow and the impeller and support surfaces, and improves the fan's operating efficiency. Example 2
[0030] The blade 101 can also be a flat surface, which is obliquely mounted on the impeller hub 10. The groove on one side end face of the blade 101 can also be a strip-shaped oblique groove, that is, the bottom of the groove is set with an oblique surface and its cross-section is triangular. This can appropriately reduce the weight of the blade, reduce the overall mass of the impeller, reduce the inertial force during rotation, help reduce the load on the motor, and improve the energy utilization efficiency of the fan. When the blade rotates, the airflow will form an arc through the oblique surface at the bottom of the groove, which expands the airflow and then contracts it. That is, the airflow increases when it passes through the groove, and when it moves to the outside of the groove, the increased airflow is compressed, which can achieve an acceleration effect, reduce the eddy and turbulence loss of the airflow on the back of the blade, improve the aerodynamic performance of the blade, and enable the fan to utilize the airflow energy more effectively during operation.
[0031] The air inlet ring 102 has a groove on the side near the impeller hub 10. The blade 101 is located in the groove and is slidably connected to it, meaning that the blade 101 and the air inlet ring 102 can rotate relative to each other. There is a certain resistance between the blade 101 and the groove. When the blade 101 rotates, the resistance can drive the air inlet ring 102 to rotate, making it rotate synchronously with the impeller. When the impeller and the air inlet rotate synchronously, the airflow can quickly enter the impeller, reducing the energy loss of the airflow during transmission, enhancing the fan's ability to draw in airflow, and thus increasing the gas flow rate per unit time. At the same time, since the air inlet ring is located on the outside, if there are external debris entering the gap between the air inlet ring and the fan, the air inlet ring will be jammed, while the blades can continue to rotate, preventing the blades from being jammed and causing the motor to burn out.
[0032] In summary, this high-efficiency, lightweight fan impeller, through the design of 1011 and 1012, reduces eddies and turbulence in the wake, lowers energy loss, and improves fan efficiency. Simultaneously, the serrations at the blade trailing edges alter the wake distribution and frequency, reducing aerodynamic interference between adjacent blades, avoiding vibration and noise caused by airflow interaction, and improving the overall aerodynamic performance and operational stability of the impeller. Furthermore, while ensuring blade strength and rigidity, the design of the 1011 slot can appropriately reduce blade weight, lower the overall mass of the impeller, and reduce inertial forces during rotation, thus helping to reduce the motor load. The air inlet is directly mounted on the impeller, allowing it to rotate synchronously with the impeller, ensuring synchronized rotation of both the impeller and the air inlet. This design allows airflow to enter the impeller more directly and quickly, reducing energy loss during transmission and enhancing the fan's ability to draw in airflow, thereby increasing the gas flow rate per unit time. The inlet ring 102 provides initial guidance and sorting of the airflow entering the impeller, ensuring smoother flow and reducing airflow turbulence and eddy currents. This improves the fan's intake efficiency, reduces intake losses, and enhances overall fan performance. Since the inlet ring 102 is fixed to the impeller, it rotates synchronously with the impeller, eliminating gaps between them and significantly reducing pressure differences. This further reduces eddy currents, leakage, and noise.
[0033] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.
[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A high-efficiency, lightweight fan impeller, comprising an impeller mounted on a fan, characterized in that: The impeller includes a fan impeller hub (10), blades (101) and an air inlet ring (102). The blades (101) are fixed to the outer periphery of the fan impeller hub (10). The end of the blades (101) is connected to the inner end face of the air inlet ring (102). Several grooves are provided on one side end face of the blades (101). A tail edge is also provided at one side edge of the blades (101).
2. The high-efficiency lightweight fan impeller according to claim 1, characterized in that: The air inlet ring (102) replaces the air inlet of the fan body and is fixedly connected to the edge of the blade (101), with one side edge of the air inlet ring (102) extending outward.
3. The high-efficiency lightweight fan impeller according to claim 1, characterized in that: The fan impeller hub (10) is hemispherical, and the air inlet ring (102) is located on the outer periphery of the blade (101). That is, the air inlet ring (102) is fixedly installed on the fan impeller hub (10) through the blade (101). The unfolded part of the air inlet ring (102) is the air inlet (103). The surface of the air inlet (103) is arc-shaped. Several drip holes (104) are also provided on the outer periphery of the fan impeller hub (10). The groove is a strip groove (1011), and the tail edge is a serrated tail (1012).
4. The high-efficiency lightweight fan impeller according to claim 3, characterized in that: The bottom of the strip groove (1011) is flat, and the serrated tail (1012) is provided on the tail side end face of the blade (101) along the airflow direction, and the size of its serrations increases sequentially from the inside to the outside.
5. The high-efficiency lightweight fan impeller according to claim 4, characterized in that: The bottom of the strip groove (1011) is sloped.
6. The high-efficiency lightweight fan impeller according to claim 1, characterized in that: The blade (101) is either a twisted shape or a planar shape.
7. The high-efficiency lightweight fan impeller according to claim 1, characterized in that: The air inlet ring (102) has a groove on the side near the fan blade hub (10), and the blade (101) is located in the groove and is slidably connected to it, that is, the blade (101) and the air inlet ring (102) can rotate relative to each other.