Double-layer fan blade structure and cooling fan

Abstract

The utility model relates to the technical field of cooling fans, in particular to a double-layer fan blade structure and a cooling fan, the double-layer fan blade structure comprises an inner ring part, a first fan blade part, an inner space ring and a second fan blade part, the first fan blade part is provided with a plurality of first blades, and the second fan blade part is provided with a plurality of second blades. The inner side edges of the first blades are arranged on the outer periphery of the inner ring part, and the outer side edges of the first blades are connected with the inner periphery of the inner space ring; and the inner side edge of the second blade is arranged on the periphery of the inner space ring. Through the synergistic effect of the double-layer fan blades, the air exhaust efficiency and the air supply effect of the fan can be effectively improved, the balance of the double-layer fan blade structure is better, and the operation of the fan is more stable.

Description

Technical Field

[0001] The utility model relates to the technical field of heat dissipation fans, in particular to a double-layer fan blade structure and a heat dissipation fan. Background Art

[0002] A cooling fan is a device used for heat dissipation purposes, which reduces the temperature of a heat source by generating an airflow. It is usually driven by an electric motor and generates airflow by rotating blades. Cooling fans can be used in a variety of applications, including computer cooling, electronic equipment cooling, automotive cooling, etc. The working principle of a cooling fan is to draw in ambient air and expel the air through rotating blades to form an airflow. This can accelerate the transfer and diffusion of heat, take away the heat, and thus reduce the temperature of the heat source. Cooling fans are usually installed on devices or systems that need to dissipate heat, such as computer motherboards, graphics cards, processors, power supplies, etc.

[0003] Existing cooling fans generally have only a single-layer fan blade structure, and the exhaust efficiency and effect are relatively simple during use, the stability is poor, and only one type of blade can be made for exhaust and blowing, and the scope of application is relatively narrow. Utility Model Content

[0004] In order to solve the above problems, the utility model provides a double-layer fan blade structure that can effectively improve the exhaust efficiency and air supply effect of the fan through the synergistic effect of the double-layer fan blade. The double-layer fan blade structure has better balance, making the operation of the fan more stable, and the blades of the double-layer fan blade can be designed into different structures, which has a wider range of applicability. Double-layer fan blade structure and cooling fan.

[0005] The technical solution adopted by the utility model is: a double-layer fan blade structure, including an inner ring portion, a first fan blade portion, an inner spacer and a second fan blade portion, the first fan blade portion is provided with a plurality of first blades, the second fan blade portion is provided with a plurality of second blades, the inner edge of the first blade is arranged on the outer periphery of the inner ring portion, and the outer edge is connected to the inner periphery of the inner spacer; the inner edge of the second blade is arranged on the outer periphery of the inner spacer.

[0006] A further improvement to the above solution is that the inner ring portion is provided with a cavity, a rotating shaft connecting portion is provided at the axis center of the cavity, and a permanent magnet is provided on the wall surface of the cavity.

[0007] A further improvement to the above solution is that the number of the second blades is greater than or equal to the number of the first blades.

[0008] A further improvement to the above solution is that the plurality of first blades and the plurality of second blades are arranged at intervals.

[0009] A further improvement to the above solution is that both the first blade and the second blade are turbine blades or exhaust blades.

[0010] A further improvement to the above solution is that one end surface of the first blade is relatively flush with the end surface of the inner spacer ring.

[0011] A further improvement to the above solution is that it also includes an outer spacer ring, the inner diameter of which is connected to the outer edge of the second blade.

[0012] A further improvement to the above solution is that one end surface of a plurality of the second blades is exposed on one end surface of the outer spacer to form a groove on the outer spacer.

[0013] A further improvement to the above solution is that the groove is provided with a reinforcing rib, and one side of the reinforcing rib is connected to the second blade.

[0014] A heat dissipation fan comprises the double-layer fan blade structure.

[0015] The beneficial effects of the utility model are:

[0016] Compared with the existing fan blade structure, the utility model adopts a double-layer blade structure, and the first blade part and the second blade part are respectively provided with a plurality of blades. This design can increase the number of blades, so that the blades can generate a larger air volume and wind pressure when rotating. Through the synergistic effect of the double-layer blades, the exhaust efficiency and air supply effect of the fan can be effectively improved. Moreover, the blades of the double-layer blades can be designed into different structures, which have a wider range of applications, such as the structure of a turbine combined with a blowing blade. In the double-layer blade structure, the inner edge of the first blade is connected to the inner periphery of the inner spacer, and the inner edge of the second blade is connected to the outer periphery of the inner spacer. This connection method can effectively reduce the generation of noise and vibration between the blades and the inner ring. At the same time, the double-layer blade structure has better balance, which makes the operation of the fan more stable and reduces the vibration and noise caused by imbalance.

[0017] In the utility model, the blades of the first blade part and the second blade part are respectively located between the inner ring part and the inner spacer ring. This design allows the wind flow to form two circulation channels between the blades, which can more fully utilize the kinetic energy of the wind flow and improve the efficiency of the fan. By optimizing the shape and arrangement of the blades, the efficiency and performance of the fan can be further improved.

[0018] In the utility model, the inner ring, the first blade part, the inner spacer and the second blade part are connected to each other to form an integrated blade system. This connection method can enhance the overall rigidity and stability of the fan and reduce the instability caused by the deformation or loosening of the blades. At the same time, the design of the double-layer blade structure can effectively reduce the resonance and instability problems of the fan when running at high speed, thereby improving the reliability and safety of the fan. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1It is a three-dimensional schematic diagram of the double-layer fan blade structure of the utility model;

[0020] Figure 2 for Figure 1 A three-dimensional schematic diagram of the double-layer fan blade structure from another perspective;

[0021] Figure 3 for Figure 1 A schematic diagram of the main view of the double-layer fan blade structure;

[0022] Figure 4 for Figure 3 Sectional view of AA.

[0023] Explanation of the accompanying drawings: inner ring portion 1, cavity 11, shaft connecting portion 12, permanent magnet 13, first blade portion 2, first blade 21, inner spacer ring 3, second blade portion 4, second blade 41, outer spacer ring 5, groove 51, reinforcing rib 52. DETAILED DESCRIPTION

[0024] In order to facilitate the understanding of the present invention, the present invention will be described more fully below with reference to the relevant drawings. The preferred embodiments of the present invention are given in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0025] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0027] like Figure 1 to Figure 4As shown, in one embodiment of the utility model, a double-layer blade structure is involved, including an inner ring portion 1, a first blade portion 2, an inner spacer 3 and a second blade portion 4, wherein the first blade portion 2 is provided with a plurality of first blades 21, and the second blade portion 4 is provided with a plurality of second blades 41, wherein the inner edge of the first blade 21 is arranged on the outer periphery of the inner ring portion 1, and the outer edge is connected to the inner periphery of the inner spacer 3; the inner edge of the second blade 41 is arranged on the outer periphery of the inner spacer 3. This embodiment adopts a double-layer blade structure, wherein the first blade portion 2 and the second blade portion 4 are respectively provided with a plurality of blades. This design can increase the number of blades, so that the blades can generate a larger air volume and air pressure when rotating. Through the synergistic effect of the double-layer blades, the exhaust efficiency and air supply effect of the fan can be effectively improved. In the double-layer blade structure, the inner edge of the first blade 21 is connected to the inner periphery of the inner spacer 3, and the inner edge of the second blade 41 is connected to the outer periphery of the inner spacer 3. This connection method can effectively reduce the generation of noise and vibration between the blade and the inner ring portion 1. At the same time, the double-layer fan blade structure is better balanced, making the fan run more smoothly and reducing vibration and noise caused by imbalance.

[0028] In the above embodiment, the blades of the first blade portion 2 and the second blade portion 4 are respectively located between the inner ring portion 1 and the inner spacer ring 3. This design allows the wind flow to form two circulation channels between the blades, which can more fully utilize the kinetic energy of the wind flow and improve the efficiency of the fan. By optimizing the shape and arrangement of the blades, the efficiency and performance of the fan can be further improved.

[0029] In the above embodiment, the inner ring 1, the first blade portion 2, the inner spacer 3 and the second blade portion 4 are connected to each other to form an integrated blade system. This connection method can enhance the overall rigidity and stability of the fan and reduce the instability caused by deformation or loosening of the blades. At the same time, the design of the double-layer blade structure can effectively reduce the resonance and instability problems of the fan when running at high speed, thereby improving the reliability and safety of the fan.

[0030] The inner ring 1 is provided with a cavity 11, a shaft connection portion 12 is provided at the axis of the cavity 11, and a permanent magnet 13 is provided on the wall of the cavity 11. In this embodiment, the cavity 11 is provided in the inner ring 1, and the shaft connection portion 12 is provided for connecting the shaft. In use, the inner ring 1 serves as the outer rotor of the fan motor, and the permanent magnet 13 is provided in the cavity 11 to rotate with the stator of the motor, synchronously driving the blades to rotate and generate wind pressure. The permanent magnet 13 is an annular magnet or a magnet composed of a plurality of arc-shaped magnetic tiles.

[0031] The number of the second blades 41 is greater than or equal to the number of the first blades 21. Specifically, a plurality of the first blades 21 and a plurality of the second blades 41 are arranged at intervals. The first blade 21 and the second blade 41 are both turbine blades or exhaust blades. In this embodiment, by increasing the number of the second blades 41, the air volume and wind pressure generated by the fan can be increased. The number of the second blades 41 is greater than the first blades 21, and the kinetic energy of the fan can be more fully utilized to improve the output capacity of the wind flow. In this way, the exhaust effect of the fan can be enhanced, and its scope of application and performance can be improved. Since the first blade 21 and the second blade 41 are both turbine blades or exhaust blades, they have good airflow guiding performance. Through appropriate blade shape and layout, the direction and speed of the wind flow can be optimized to make it more concentrated and high-speed. In this way, the air supply effect of the fan can be improved, so that it has better effects in heat dissipation, ventilation, etc. By setting the interval between the first blade 21 and the second blade 41, the mutual interference between the blades can be effectively reduced, and the comfort and quietness of its working environment can be improved.

[0032] One end face of the first blade 21 is relatively flush with the end face of the inner spacer 3. In this embodiment, by making one end face of the first blade 21 relatively flush with the end face of the inner spacer 3, the flow direction of the wind can be better guided. This design can reduce the gap and resistance between the fan blades and the inner spacer 3, so that the wind can pass through the channel between the blades and the inner spacer 3 more smoothly. In this way, the airflow guidance of the fan can be improved, making the windflow more concentrated and efficient.

[0033] It also includes an outer spacer 5, the inner diameter of which is connected to the outer edge of the second blade 41. Specifically, one end surface of a plurality of the second blades 41 is exposed on one end surface of the outer spacer 5 to form a groove 51 on the outer spacer 5. The groove 51 is provided with a reinforcing rib 52, one side of which is connected to the second blade 41. In this embodiment, the rigidity and stability of the overall structure of the fan can be increased by the provision of the outer spacer 5. The connection between the outer spacer 5 and the second blade 41 can effectively resist the deformation and vibration of the blade, thereby improving the working stability of the fan. By forming the groove 51 on the outer spacer 5 and providing the reinforcing rib 52 in the groove 51, the strength and endurance of the blade can be increased. In this way, the deformation and fatigue of the blade during high-speed rotation can be reduced, and the service life of the blade can be extended. The provision of the groove 51 and the reinforcing rib 52 can improve the flow of the wind between the blade and the outer spacer 5, reduce the generation of eddy currents and turbulence, and improve the efficiency and performance of the fan.

[0034] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A double-layer fan blade structure, characterized in that: It includes an inner ring portion, a first fan blade portion, an inner spacer and a second fan blade portion. The first fan blade portion is provided with a plurality of first blades, and the second fan blade portion is provided with a plurality of second blades. The inner edge of the first blade is arranged on the outer periphery of the inner ring portion, and the outer edge is connected to the inner periphery of the inner spacer; the inner edge of the second blade is arranged on the outer periphery of the inner spacer.

2. The double-layer fan blade structure according to claim 1, characterized in that: The inner ring portion is provided with a cavity, a rotating shaft connecting portion is provided at the axis center of the cavity, and a permanent magnet is provided on the wall surface of the cavity.

3. The double-layer fan blade structure according to claim 1, characterized in that: The number of the second blades is greater than or equal to the number of the first blades.

4. The double-layer fan blade structure according to claim 1, characterized in that: The plurality of first blades and the plurality of second blades are arranged at intervals.

5. The double-layer fan blade structure according to claim 1 is characterized in that: The first blade and the second blade are both turbine blades or exhaust blades.

6. The double-layer fan blade structure according to claim 1, characterized in that: One end surface of the first blade is relatively flush with the end surface of the inner spacer.

7. The double-layer fan blade structure according to claim 1, characterized in that: An outer spacer is also included, wherein the inner diameter of the outer spacer is connected to the outer side edge of the second blade.

8. The double-layer fan blade structure according to claim 7, characterized in that: One end surface of the plurality of second blades is exposed on one end surface of the outer spacer to form a groove on the outer spacer.

9. The double-layer fan blade structure according to claim 8, characterized in that: The groove is provided with a reinforcing rib, and one side of the reinforcing rib is connected to the second blade.

10. A cooling fan, characterized in that: It comprises the double-layer fan blade structure as described in any one of claims 1 to 9.

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