Reinforced structure of a series fan frame

Abstract

The utility model provides a kind of reinforced structure of cascading fan frame, including a front fan frame and a rear fan frame, the front fan frame has a front shaft seat, the rear fan frame has a rear shaft seat, the front shaft seat one end boundary formation has a front joint ring, the rear shaft seat one end boundary formation has a rear joint end edge, by front joint ring and rear joint ring each other fusion or cementing, so that the front shaft seat and rear shaft seat can be jointed fixed, thereby the rigidity of fan frame overall structure is improved.

Description

Technical Field

[0001] This utility model relates to a fan frame, and more particularly to a reinforced structure for a series fan frame that enhances the overall structural rigidity and natural frequency of the fan frame by strengthening the connecting fan frames, and reduces the fundamental frequency vibration and resonance caused by rotor imbalance during fan operation. Background Technology

[0002] With the advancement of technology, people's dependence on various electronic devices has also increased. However, when operating, the components inside electronic products (such as computers and laptops) generate a lot of heat. If the heat cannot be dissipated from the electronic product in time, overheating can easily occur. Therefore, most electronic products often use a fan for active cooling to keep the electronic product operating within a certain operating temperature range. However, sometimes the airflow provided by a single fan is insufficient. Therefore, two or more fans are often connected in series to form a tandem fan to provide sufficient airflow.

[0003] When a series fan operates, it generates fundamental frequency vibration due to the fundamental frequency excitation force, which is mainly caused by rotor imbalance. This results in the generation of periodic energy with a fixed frequency during the operation of the series fan. This periodic energy is transmitted to the series fan, causing fundamental frequency vibration. The closer the natural frequency of the fan frame series structure is to the excitation force frequency, the larger the amplitude. When the two are close, resonance occurs. Conventional series fans fix the four corners of the frame together, but the bottom surfaces of the front and rear stage bearings are not fixed with a large surface area. This causes the bottom surfaces in large contact to collide with each other due to the vibration frequency, generating noise. Furthermore, conventional series fans use thickened frame chassis and frame brackets, as well as control of fan blade imbalance, to reduce fundamental frequency vibration. However, when maintaining high fan efficiency, thickening the frame chassis limits the space for circuit board components and cannot meet design requirements. Thickening the frame brackets reduces heat dissipation efficiency. Controlling fan blade imbalance leads to reduced production yield and increased production costs.

[0004] Therefore, how to reduce the contact area to reduce the vibration frequency, and how to reduce the resonance caused by the fundamental frequency vibration while maintaining heat dissipation efficiency, not affecting the installation space, and avoiding increasing production costs, are the directions that the designers of this project and related manufacturers in this industry are eager to study and improve. Utility Model Content

[0005] Therefore, in order to effectively solve the above problems, the main purpose of this utility model is to provide a reinforced structure for a series fan frame, which strengthens the overall structural strength by adding a connecting mechanism between the bearing seats of the series fan frame, greatly improving the structural rigidity and natural frequency of the overall fan frame, and reducing the fundamental frequency vibration and resonance caused by rotor imbalance during fan operation.

[0006] To achieve the above objectives, this utility model provides a reinforced structure for a series fan frame, comprising a pre-stage fan frame and a post-stage fan frame. The pre-stage fan frame has a pre-stage bearing on one side, and an axial end of the pre-stage bearing defines a pre-stage engagement ring. The post-stage fan frame has a post-stage bearing on one side, and an axial end of the post-stage bearing defines a post-stage engagement ring. The pre-stage bearing and the post-stage bearing are welded or glued together via the pre-stage engagement ring and the post-stage engagement ring, respectively, thereby achieving a permanent, non-removable connection between the pre-stage bearing and the post-stage bearing. This creates a common accommodating space between the pre-stage bearing and the post-stage bearing, thereby improving the rigidity and natural frequency of the overall structure of the series fan frame and reducing fundamental frequency vibration and resonance caused by rotor imbalance during fan operation.

[0007] Wherein, at least one front-stage outer assembly is formed on the outer side of the front-stage sector frame, and at least one rear-stage outer assembly is formed on the outer side of the rear-stage sector frame, which is combined with the front-stage outer assembly.

[0008] The front stage bearing has a front stage recess defined at its bottom, and a front stage engagement ring is defined on the outer periphery of the axial end of the front stage recess relative to the front stage recess. A front stage circuit board is disposed inside the front stage recess. The rear stage bearing has a rear stage recess defined at its bottom, and a rear stage engagement ring is defined on the outer periphery of the axial end of the rear stage recess relative to the rear stage recess. The front stage engagement ring and the rear stage engagement ring are fused or glued together to form the receiving space.

[0009] The front stage engagement ring edge forms a front stage engagement portion, and the rear stage engagement ring edge forms a rear stage engagement portion. The front stage bearing and the rear stage bearing are respectively fused or glued to the front stage engagement portion and the rear stage engagement portion.

[0010] This utility model embodiment also provides a reinforced structure for a series fan frame, comprising a pre-stage fan frame, a post-stage fan frame, and a connector. The pre-stage fan frame has a pre-stage bearing on one side, and an axial end of the pre-stage bearing defines a pre-stage engagement ring. The post-stage fan frame has a post-stage bearing on one side, corresponding to the pre-stage bearing, and an axial end of the post-stage bearing defines a post-stage engagement ring. A connector is provided between the pre-stage bearing and the post-stage bearing, and a connecting portion is formed on the periphery of the connector. The connector is used to weld or glue the pre-stage engagement ring and the post-stage engagement ring together, thereby fixing the pre-stage bearing and the post-stage bearing in place. This significantly improves the rigidity and natural frequency of the overall structure of the series fan frame, reducing fundamental frequency vibration and resonance caused by rotor imbalance during fan operation.

[0011] Wherein, at least one front-stage outer assembly is formed on the outer side of the front-stage sector frame, and at least one rear-stage outer assembly is formed on the outer side of the rear-stage sector frame, which is combined with the front-stage outer assembly.

[0012] The connector has a connecting portion formed on its outer side, and the connector is formed by the connecting portion joining the front engagement ring edge and the rear engagement ring edge.

[0013] The front stage bearing has a front stage recess defined at its bottom, and the front stage bearing has a front stage engagement ring defined around its axial end relative to the front stage recess. The rear stage bearing has a rear stage recess defined at its bottom, and the rear stage bearing has a rear stage engagement ring defined around its axial end relative to the rear stage recess.

[0014] The connector is formed by the connecting part engaging the front stage engagement ring edge and being disposed opposite to the bottom of the front stage bearing seat. The connector is formed by the connecting part engaging the rear stage engagement ring edge and being disposed opposite to the bottom of the rear stage bearing seat, so that the front stage recess and the rear stage recess together form a receiving space, and the connector is located in the receiving space and isolates the front stage circuit board and the rear stage circuit board.

[0015] Advantages of this utility model:

[0016] 1. The pre-stage and post-stage shafts are connected and fixed by gluing or welding, which significantly reduces the vibration frequency and overcomes the disadvantage of conventional pre-stage and post-stage shafts having a large contact area that amplifies the vibration frequency. Simultaneously, the recesses in the pre-stage and post-stage shafts together form a receiving space, which not only shortens the axial distance but also significantly improves the overall rigidity and natural frequency of the fan frame structure, and reduces fundamental frequency vibration and resonance caused by rotor imbalance during fan operation.

[0017] 2. Facilitates subsequent maintenance and replacement work.

[0018] 3. The structure, which uses a single storage space, can maintain heat dissipation efficiency without affecting the circuit layout space.

[0019] 4. It can maintain production yield and production costs. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the reinforced structure of the fan frame connected in series according to this utility model.

[0021] Figure 2 This is an exploded perspective view of the reinforced structure of the fan frame in the first embodiment of the present invention.

[0022] Figure 3 This is a schematic planar cross-sectional view of the reinforcing structure of the fan frame in the first embodiment of the present invention. Figure 1 .

[0023] Figure 4 This is a schematic planar cross-sectional view of the reinforcing structure of the fan frame in the first embodiment of the present invention. Figure 2 .

[0024] Figure 5 This is an exploded perspective view of the reinforced structure of the fan frame in the second embodiment of the present invention.

[0025] Figure 6 This is a schematic planar cross-sectional view of the reinforcing structure of the fan frame in the second embodiment of the present invention. Figure 1 .

[0026] Figure 7 This is a schematic planar cross-sectional view of the reinforcing structure of the fan frame in the second embodiment of the present invention. Figure 2 .

[0027] Explanation of reference numerals in the attached drawings: 1. Reinforced structure of the fan frame in series; 2. Preamp fan frame; 21. Preamp shaft seat; 211. Preamp inner notch; 212. Preamp joint ring; 213. Preamp joint; 214. Preamp circuit board; 22. Preamp outer assembly; 23. Accommodation space; 3. Power fan frame; 31. Power shaft seat; 311. Power inner notch; 312. Power joint ring; 313. Power joint; 314. Power circuit board; 32. Power outer assembly; 4. Connector; 41. Detailed Implementation

[0028] The above-mentioned objectives of this utility model and its structural and functional characteristics will be described with reference to the preferred embodiments shown in the accompanying drawings.

[0029] Please see Figure 1 , Figure 2 , Figure 3The figures shown are, respectively, a three-dimensional assembly view of the reinforcing structure of the series fan frame of this utility model, an exploded three-dimensional view and a planar sectional view of the first embodiment. Figure 1 As shown in the figure, this utility model provides a reinforced structure 1 for a series fan frame, comprising: a pre-stage fan frame 2 and a post-stage fan frame 3.

[0030] The preamp fan frame 2 has a preamp bearing 21, which is formed on one side of the preamp fan frame 2 by a preamp stator blade. The preamp bearing 21 defines a preamp recess 211. The preamp bearing 21 defines a preamp engagement ring 212 on the outer periphery of the axial end of the preamp recess 211. A preamp engagement portion 213 is formed on the preamp engagement ring 212. In this embodiment, the preamp engagement portion 213 is described using the preamp engagement ring 212 and the side recess structure, but it is not limited thereto. A preamp circuit board 214 is provided in the preamp recess 211 of the preamp bearing 21. At least one preamp outer assembly portion 22 is formed on the outer side of the preamp fan frame 2. The preamp outer assembly portion 22 is described using a snap-fit ​​hole as an example.

[0031] The rear stage fan frame 3 has a rear stage bearing 31, which is formed on one side of the rear stage fan frame 3 by means of a rear stage stator blade. The bottom of the rear stage bearing 31 defines a rear stage inner recess 311. The rear stage bearing 31 defines a rear stage engagement ring 312 on the outer periphery of the axial end of the rear stage inner recess 311. A rear stage engagement portion 313 is formed on the rear stage engagement ring 312. In this embodiment, the rear stage engagement portion 313 is described using the rear stage engagement ring 312 and the side recess structure as an illustrative example, but it is not limited thereto. A rear stage circuit board 314 is provided in the rear stage inner recess 311 of the rear stage bearing 31. Furthermore, at least one rear stage outer assembly portion 32 is formed on the outer side of the rear stage fan frame 3, and the rear stage outer assembly portion 32 is described using a retaining post as an illustrative example.

[0032] The preamplifier fan frame 2 is connected in series with the inverted rear amplifier fan frame 3, and the preamplifier bearing 21 and the rear amplifier bearing 31 are interconnected. A glue is provided within the preamplifier joint portion 213 and the rear amplifier joint portion 313, which are formed by the opposing preamplifier joint ring 212, the rear amplifier joint ring 312, and the side recess structure, to glue the preamplifier joint ring 212 to the rear amplifier joint ring 312, forming a non-removable connection. The preamplifier inner recess 211 defined by the preamplifier bearing 21 and the front amplifier joint portion 312 defined at the axial end... The stage engagement ring 212 corresponds to the structure of the rear stage recess 311 defined by the rear stage bearing 31 and the rear stage engagement ring 312 defined at the axial end. After the front stage bearing 21 and the rear stage bearing 31 are glued together, the front stage engagement ring 212 and the rear stage engagement ring 312 are fixed together, thereby significantly reducing the vibration frequency. Furthermore, the front stage recess 211 and the rear stage recess 311 together form a receiving space 23, which shortens the axial distance between the front stage bearing 21 and the rear stage bearing 31. The receiving space 23 is used to house at least one circuit board or to house the front stage circuit board 214 and the rear stage circuit board 314 respectively. Furthermore, by engaging the pre-stage engagement ring 212 with the post-stage engagement ring 312 and engaging the pre-stage outer assembly 22 with the post-stage outer assembly 32, not only can the outer periphery and the inner center of the pre-stage fan frame 2 and the post-stage fan frame 3 be fixed together, but the overall structural rigidity and natural frequency of the fan frame can also be improved, and the fundamental frequency vibration and mutual resonance caused by rotor imbalance during fan operation can be reduced.

[0033] Please refer to the following: Figure 4 As shown, it is a planar cross-sectional view of the reinforced structure of the fan frame in the first embodiment of this utility model. Figure 2 , and the aforementioned Figure 1 , Figure 2 , Figure 3 The schematic cross-sectional view of the reinforced structure of the fan frame in the first embodiment shown. Figure 1 The same structure and function will not be repeated here. The difference is that, in this embodiment, the pre-stage joint 213 and the post-stage joint 313 are illustrated by an ultrasonic welding structure, while the post-stage joint 313 is illustrated by a structure that can be welded with an ultrasonic welding structure, so as to achieve the same functions and advantages as described above.

[0034] In addition to the ultrasonic welding mentioned above, the connection between the pre-stage coupling ring 212 and the post-stage coupling ring 312 can also be achieved by welding, thermal welding, laser welding, or other connection methods, so as to achieve an integral connection between the pre-stage bearing 21 and the post-stage bearing 31.

[0035] Additionally, please see Figure 5 , Figure 6 and Figure 7The figures shown are an exploded perspective view and a cross-sectional view of the reinforcing structure of the fan frame in the second embodiment of this utility model. Figure 1 , Two As shown in the figure, similar to the aforementioned Figures 1 to 4 The same structure as the first embodiment shown will not be described again. The difference is that it further includes a connecting body 4, through which the aforementioned front stage bearing 21 and rear stage bearing 31 are connected to each other.

[0036] The connector 4 is disposed between the preamplifier frame 2 and the rear amplifier frame 3, and the connector 4 has a connecting portion 41 formed around the outside of the connector 4, and is, for example, but not limited to, a recessed structure. The preamplifier frame 2 is interconnected with the connector 4 and the inverted rear amplifier frame 3. The preamplifier bearing 21 and one side of the connector 4 are connected by a preamplifier joint 213 and a colloid (such as...) within the connecting portion 41. Figure 6 (as shown), or by ultrasonic welding (such as...) Figure 7 (As shown), the rear stage bearing 31 and the other side of the connector 4 are then connected by a glue or by ultrasonic welding through the rear stage joint 313 and the connecting part 41, so that the connector 4 is connected and fixed to the front stage joint ring 212 and the rear stage joint ring 312 respectively through the glue or by ultrasonic welding. In this way, the front stage inner recess 211 and the rear stage inner recess 311 together form the receiving space 23, and the connector 4 is located in the receiving space 23 to isolate the front stage circuit board 214 and the rear stage circuit board 314.

[0037] Furthermore, the outer diameter of the connector 4 is less than or equal to the outer diameter of the pre-stage bearing 21, and the outer diameter of the connector 4 is less than or equal to the outer diameter of the post-stage bearing 31. When the connector 4 is connected between the pre-stage bearing 21 and the post-stage bearing 31, the connector 4 can be embedded relatively inside the pre-stage bearing 21 and the post-stage bearing 31, or connected between the pre-stage bearing 21 and the post-stage bearing 31. This ensures that the connector 4 does not increase the thickness of the pre-stage fan frame 2 and the post-stage fan frame 3, nor does it affect the airflow direction and velocity outside the pre-stage bearing 21 and the post-stage bearing 31.

[0038] In addition to the ultrasonic welding mentioned above, the connection method between the connecting part 41 and the pre-stage engagement ring 212 and the post-stage engagement ring 312 can also be welding, thermal welding, laser welding and other connection methods, so that the pre-stage bearing 21 and the post-stage bearing 31 can be connected to each other through the connecting body 4.

[0039] This not only improves the overall structural rigidity and natural frequency of the fan frame, but also solves the problem that thickening the frame chassis would restrict the space for circuit board components and fail to meet design requirements.

[0040] As described above, this utility model has the following advantages over conventional methods:

[0041] 1. The pre-stage and post-stage shafts are connected and fixed by gluing or welding, which significantly reduces the vibration frequency and overcomes the disadvantage of conventional pre-stage and post-stage shafts having a large contact area that amplifies the vibration frequency. Simultaneously, the recesses in the pre-stage and post-stage shafts together form a receiving space, which not only shortens the axial distance but also significantly improves the overall rigidity and natural frequency of the fan frame structure, and reduces fundamental frequency vibration and resonance caused by rotor imbalance during fan operation.

[0042] 2. Facilitates subsequent maintenance and replacement work.

[0043] 3. The structure, which uses a single storage space, can maintain heat dissipation efficiency without affecting the circuit layout space.

[0044] 4. It can maintain production yield and production costs.

Claims

1. A reinforced structure for a series-connected fan frame, characterized in that, include: A preamp sector frame having a preamp bearing, one axial end of which defines a preamp engagement ring edge; A rear stage fan frame has a rear stage bearing seat, one axial end of which defines a rear stage engagement ring edge. The front stage bearing seat and the rear stage bearing seat are respectively welded or glued through the front stage engagement ring edge and the rear stage engagement ring edge, thereby forming a receiving space together between the front stage bearing seat and the rear stage bearing seat.

2. The reinforced structure of the series fan frame as described in claim 1, characterized in that: At least one pre-stage outer assembly is formed on the outer side of the pre-stage fan frame, and at least one post-stage outer assembly is formed on the outer side of the post-stage fan frame, wherein the post-stage outer assembly and the pre-stage outer assembly are combined with each other.

3. The reinforced structure of the series fan frame as described in claim 1, characterized in that: The bottom of the preamplifier shaft defines a preamplifier recess, and the preamplifier shaft defines a preamplifier engagement ring around the axial end of the preamplifier recess. A preamplifier circuit board is disposed inside the preamplifier recess. The bottom of the rear stage shaft defines a rear stage recess, and the rear stage shaft defines a rear stage engagement ring around the axial end of the rear stage recess. The preamplifier engagement ring and the rear stage engagement ring are fused or glued together to form the receiving space.

4. The reinforced structure of the series fan frame as described in claim 1, characterized in that: The front stage engagement ring edge forms a front stage engagement portion, and the rear stage engagement ring edge forms a rear stage engagement portion. The front stage bearing and the rear stage bearing are respectively fused or glued to the front stage engagement portion and the rear stage engagement portion.

5. A reinforced structure for a series-connected fan frame, characterized in that, include: A preamp sector frame having a preamp bearing, one axial end of which defines a preamp engagement ring edge; A power stage fan frame having a power stage bearing seat, one axial end of which defines a power stage engagement ring edge; A connecting body is provided between the pre-stage bearing and the rear-stage bearing. The pre-stage engagement ring and the rear-stage engagement ring are respectively fused or glued through the connecting body to fix the pre-stage bearing and the rear-stage bearing together.

6. The reinforced structure of the series fan frame as described in claim 5, characterized in that: At least one pre-stage outer assembly is formed on the outer side of the pre-stage fan frame, and at least one post-stage outer assembly is formed on the outer side of the post-stage fan frame, wherein the post-stage outer assembly and the pre-stage outer assembly are combined with each other.

7. The reinforced structure of the series fan frame as described in claim 5, characterized in that: A connecting portion is formed on the outer side of the connector, and the connector is formed by the connecting portion joining the front engagement ring edge and the rear engagement ring edge.

8. The reinforced structure of the series fan frame as described in claim 7, characterized in that: The bottom of the pre-stage bearing defines a pre-stage recess, and the pre-stage bearing defines a pre-stage engagement ring around the axial end of the pre-stage recess. The bottom of the rear bearing defines a rear-stage recess, and the rear bearing defines a rear-stage engagement ring around the axial end of the rear-stage recess.

9. The reinforced structure of the series fan frame as described in claim 8, characterized in that: The connector is formed by the connecting part engaging the front stage engagement ring edge and being disposed opposite to the bottom of the front stage bearing seat. The connector is formed by the connecting part engaging the rear stage engagement ring edge and being disposed opposite to the bottom of the rear stage bearing seat, so that the front stage recess and the rear stage recess together form a receiving space. The connector is located in the receiving space and isolates the front stage circuit board and the rear stage circuit board.

10. The reinforced structure of the series fan frame as described in claim 5, characterized in that: The outer diameter of the connector is less than or equal to the outer diameter of the pre-stage bearing, and the outer diameter of the connector is less than or equal to the outer diameter of the post-stage bearing.

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