Patent Grant
11181125
The present invention relates generally to a fan frame body and a fan thereof, and more particularly to a fan frame body with damping structure and a fan thereof.
In the field of heat dissipation, a conventional fan is used to create cooling airflow for forcedly carrying away the heat so as to effectively dissipate the heat. The principle of the creation of cooling airflow of the fan is that the fan blades of the rotor are designed with vane configuration. A motor and a circuit board are used to drive the rotor to rotate by a nominal speed. The vane-shaped fan blades rotate to work and create push force so as to create cooling airflow. When the rotor is rotated, unnecessary fundamental frequency vibration of the fan frame often takes place to make noise. Moreover, when the fan applied to a server or a computer rotates, the fundamental frequency vibration of the fan will affect the hard disk reading efficiency of the server and the computer. In addition, the fundamental frequency vibration of the rotor in rotation will shorten the lifetime of the fan itself and the server and the computer or the like information technology equipment or a communication equipment, a domestic and audio/video equipment or an industrial equipment. Currently, there are several ways to lower the fundamental frequency vibration of the rotor of the fan, including counterbalancing and rectifying the rotor or adding pads or other vibration absorption and sound insulation material to the fan frame to absorb the vibration.
However, in the above manner, additional materials such as the counterweight and vibration absorption pad are applied to the fan so that the cost is increased.
It is therefore tried by the applicant to provide a fan frame body with damping structure and a fan thereof to lower the fundamental frequency vibration of the fan so as to prolong the lifetime of the fan frame, the server and the computer or the like information technology equipment and enhance the hard disk reading efficiency and lower the cost for the damping structure.
It is therefore a primary object of the present invention to provide a fan frame body with damping structure and a fan thereof to lower the fundamental frequency vibration of the fan frame and lower the cost for the damping structures.
It is a further object of the present invention to provide a fan frame body with damping structure and a fan thereof to prolong the lifetime of the fan frame and the equipment employing the fan such as a server and a computer or the like information technology equipment or a communication equipment, a domestic and audio/video equipment or an industrial equipment and enhance the hard disk reading efficiency thereof.
To achieve the above and other objects, the fan frame body with damping structure includes a fan frame main body having a first opening, a second opening, a flow way and a base section. The first and second openings are respectively positioned at the upper and lower ends of the fan frame main body. The flow way is disposed between the first and second openings in communication with the first and second openings. The base section is disposed at the second opening. A bearing cup and multiple static blades are perpendicularly disposed on the base section. Two ends of the static blades are respectively connected with the base section and the fan frame main body. Multiple damping structures are annularly disposed on an inner wall of the fan frame main body. The damping structures are raised body structures or recess structures.
To achieve the above and other objects, the fan of the fan frame body with damping structure includes: a stator assembly having multiple silicon steel sheets and multiple windings wound around the silicon steel sheets, the stator assembly being fitted around the bearing cup; a rotor assembly having a central shaft, a hub and a permanent magnet, the central shaft being perpendicularly assembled with the hub, multiple fan blades being annularly disposed on outer circumference of the hub, the permanent magnet being disposed on inner circumference of the hub; and a bearing disposed in the bearing cup, the central shaft being rotatably disposed in the bearing.
By means of the design of the present invention, the damping structures can reinforce the structure of the fan frame main body to lower 30˜50% of the vibration amplitude of the fundamental frequency vibration. In this case, the equipment employing the fan frame body with damping structure and the fan thereof, (such as a server or a computer) can have better hard disk reading efficiency.
The structure and the technical means adopted by the present invention to achieve the above and other objects can be best understood by referring to the following detailed description of the preferred embodiments and the accompanying drawings, wherein:
Please refer to
The fan frame main body 100 has a first opening 101, a second opening 102, a flow way 107 and a base section 108. The first and second openings 101, 102 are respectively positioned at the upper and lower ends of the fan frame main body 100. The flow way 107 is disposed between the first and second openings 101, 102 in communication with the first and second openings 101, 102. The base section 108 is disposed at the second opening 102. A bearing cup 1081 and multiple static blades 1082 are perpendicularly disposed on the base section 108. Two ends of the static blades 1082 are respectively connected with the base section 108 and the fan frame main body 100. Multiple damping structures 109 are annularly disposed on an inner wall of the fan frame main body 100. The damping structures 109 are selectively raised body structures 1091 or recess structures 1092.
The damping structures 109 have a geometrical form. In this embodiment, the damping structures 109 are, but not limited to, in the form of a parallelogram. In other embodiments, the damping structures 109 can have another geometrical form, such as rectangular, circular and elliptic configuration. In addition, the damping structures 109 respectively define a damping structure virtual axis X. In this embodiment, the damping structure virtual axes X of every damping structure 109 are parallel to each other. In a modified embodiment, the damping structure virtual axes X of every damping structure 109 can be alternatively unparallel to each other. The fan frame main body 100 defines a fan frame main body virtual axis Y. The fan frame main body virtual axis Y and the damping structure virtual axes X contain an angle α ranging from one degree to 179 degrees or 181 degree to 359 degrees. In this embodiment, the damping structures 109 are uniformly annularly arranged, that is, the damping structures 109 are arranged at equal intervals. In a modified embodiment, the damping structures 109 can be alternatively non-uniformly annularly arranged.
By means of the design of the present invention, the arrangement of the damping structures 109 can reinforce the structure of the fan frame main body 100 to lower 30˜50% of the vibration amplitude of the fundamental frequency vibration. In this case, the equipment employing the fan, (such as a server or a computer or the like information technology equipment or a communication equipment, a domestic and audio/video equipment or an industrial equipment) can have better hard disk reading efficiency or lower the vibration of the equipment to enhance the stability.
Please now refer to
In this embodiment, the support frames of the fan frame main body 100 include a first support frame 100a and a second support frame 100b. The first opening 101 is formed on an upper side of the first support frame 100a. A third opening 103 is formed on a lower side of the first support frame 100a. The second opening 102 is formed on a lower side of the second support frame 100b. A fourth opening 104 is formed on an upper side of the second support frame 100b. The first and second support frames 100a, 100b are made of different materials.
The damping structure 109 has a first part 109a and a second part 109b. The first part 109a is formed on the first support frame 100a. The second part 109b is formed on the second support frame 100b corresponding to the first part 109a. The first and second support frames 100a, 100b are axially overlapped to form the fan frame main body 100. The third opening 103 of the first support frame 100a corresponds to the fourth opening 104 of the second support frame 100b. The first and second parts 109a, 109b correspondingly form the damping structure 109. The materials of the first support frame 100a and the second support frame 100b are different from each other. For example, the first support frame 100a is made of PBT material, while the second support frame 100b is made of PA66 material. The vibration frequencies of the different materials are different from each other so that the co-vibration of the first and second support frames 100a, 100b can be further reduced to lower the noise.
Please now refer to
The damping structure 109 further has a third part 109c. The third part 109c is formed on the third support frame 100c. An upper section of the third part 109c corresponds to the first part 109a. A lower section of the third part 109c corresponds to the second part 109b. The first, second and third support frames 100a, 100b, 100c are axially overlapped to form the fan frame main body 100. The third opening 103 corresponds to the fifth opening 105. The fourth opening 104 corresponds to the sixth opening 106. The first, second and third parts 109a, 109b, 109c correspondingly form the damping structure 109. The materials of the first support frame 100a, the second support frame 100b and the third support frame 100c are different from each other. For example, the first support frame 100a is made of PBT material, the second support frame 100b is made of PA66 material, while the third support frame 100c is made of PPE material. The vibration frequencies of the different materials are different from each other so that the co-vibration of the first, second and third support frames 100a, 100b, 100c can be further reduced to lower the noise.
Please now refer to
The stator assembly 20 has multiple silicon steel sheets 201 and multiple windings 202 wound around the silicon steel sheets 201. The stator assembly 20 is fitted around the bearing cup 1081. The rotor assembly 30 has a central shaft 301, a hub 302 and a permanent magnet 304. The central shaft 301 is perpendicularly assembled with the hub 302. Multiple fan blades 303 are annularly disposed on outer circumference of the hub 302. The bearing 40 is disposed in the bearing cup 1081. The central shaft 301 is rotatably disposed in the bearing 40. The permanent magnet 304 is correspondingly spaced from outer surfaces of the silicon steel sheets 201.
Please now refer to
The present invention has been described with the above embodiments thereof and it is understood that many changes and modifications in such as the form or layout pattern or practicing step of the above embodiments can be carried out without departing from the scope and the spirit of the invention that is intended to be limited only by the appended claims.
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| Number | Date | Country | |
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| 20190323523 A1 | Oct 2019 | US |
