CN108443233B

CN108443233B - Fan frame with vibration reduction structure and fan thereof

Info

Publication number: CN108443233B
Application number: CN201810298353.2A
Authority: CN
Inventors: 张栢灏; 王仲澍
Original assignee: Asia Vital Components Co Ltd
Current assignee: Asia Vital Components Co Ltd
Priority date: 2018-03-30
Filing date: 2018-03-30
Publication date: 2021-03-02
Anticipated expiration: 2038-03-30
Also published as: CN108443233A; CN112762018A

Abstract

The invention provides a fan frame body with a vibration damping structure and a fan thereof, comprising a fan frame body, wherein the fan frame body is provided with a first through hole, a second through hole, a flow channel and a bottom, the first through hole and the second through hole are respectively arranged at the upper end and the lower end of the fan frame body, the flow channel is arranged between the first through hole and the second through hole and is communicated with the first through hole and the second through hole, the bottom is arranged at the second through hole, a shaft cylinder and a plurality of stationary blades are vertically arranged at the bottom, two ends of the plurality of stationary blades are respectively connected with the bottom and the fan frame body, the inner wall of the fan frame body is annularly arranged with a plurality of vibration damping structures, and the plurality of vibration damping structures can be selected to be either a convex body structure or a groove structure.

Description

Fan frame with vibration reduction structure and fan thereof

Technical Field

The present invention relates to a fan frame and a fan thereof, and more particularly, to a fan frame with a vibration reduction structure and a fan thereof.

Background

In the field of heat dissipation, in order to effectively dissipate heat, forced heat dissipation is performed by using cooling airflow generated by a fan, so as to dissipate the heat. The principle of the fan for generating cooling airflow is not limited to the wing-shaped design of fan blades on the rotor, the rotor is driven by the motor and the circuit board to rotate at a rated speed, and the rotating wing-shaped blades turn to do work to generate thrust to generate cooling airflow. The fan frame often generates unnecessary fundamental frequency vibration when the rotor rotates to derive extra noise, moreover, when the rotor is applied to a fan in a server and a computer, the fundamental frequency vibration generated by the rotation can influence the reading efficiency of a hard disk in the server and the computer, and the fundamental frequency vibration generated by the rotation of the rotor can shorten the service life of the fan, IT equipment such as the server and the computer, communication equipment, household and audio-visual equipment and industrial equipment. The prior art methods for reducing the fundamental frequency vibration of the fan rotor include balancing and correcting the rotor weight or adding a gasket or other vibration-absorbing and sound-insulating material to the fan frame to absorb the vibration.

However, the above-mentioned prior art method incurs additional cost due to the input of additional materials, such as a weight block, a shock absorbing pad, and the like.

Therefore, how to reduce the fundamental frequency vibration to increase the service life of the fan frame of the fan, the service life of the server, the computer and other devices, and increase the reading efficiency, and reducing the cost of vibration reduction is the direction of effort required by researchers in this field.

Disclosure of Invention

The invention aims to reduce the fundamental frequency vibration of a fan frame of a fan and reduce the cost of vibration reduction.

Another objective of the present invention is to increase the service life and reading efficiency of the fan frame of the fan, and IT devices such as servers and computers, communication devices, home and audio/video devices, and industrial devices using the fan frame.

To achieve the above object, the present invention provides a fan frame with a vibration reduction structure, comprising:

the fan frame body is provided with a first through hole, a second through hole, a flow channel and a bottom, wherein the first through hole and the second through hole are respectively arranged at the upper end and the lower end of the fan frame body, the flow channel is arranged between the first through hole and the second through hole and is communicated with the first through hole and the second through hole, the bottom is arranged at the second through hole, a shaft cylinder and a plurality of stationary blades are vertically arranged at the bottom, the two ends of the plurality of stationary blades are respectively connected with the bottom and the fan frame body, the inner wall of the fan frame body is annularly arranged and is provided with a plurality of vibration damping structures, and the plurality of vibration damping structures are selected to be convex structures or groove structures.

The fan frame with vibration damping structure, wherein: the fan frame body has a plurality of frames, and the plurality of frames are axially overlapped to form the fan frame body and the plurality of vibration reduction structures.

The fan frame with vibration damping structure, wherein: the plurality of frames are provided with a first frame and a second frame, the first through opening is formed on the upper side of the first frame, a third through opening is formed on the lower side of the first frame, the second through opening is formed on the lower side of the second frame, a fourth through opening is formed on the upper side of the second frame, and the first frame and the second frame are made of different materials.

The fan frame with vibration damping structure, wherein: the plurality of vibration reduction structures are provided with a first part and a second part, the first part is formed on the first frame, the second part is formed on the second frame and corresponds to the first part, the first frame and the second frame are axially overlapped to form the fan frame body, the third through hole corresponds to the fourth through hole, and the first part and the second part correspondingly form the vibration reduction structures.

The fan frame with vibration damping structure, wherein: the plurality of frames also have a third frame, a fifth port is formed on the upper side of the third frame, a sixth port is formed on the lower side of the third frame, and the first frame, the second frame and the third frame are made of different materials.

The fan frame with vibration damping structure, wherein: the plurality of vibration reduction structures are provided with a first part, a second part and a third part, the first part is formed on the first frame, the second part is formed on the second frame, the third part is formed on the third frame, the upper part of the third part corresponds to the first part, the lower part of the third part corresponds to the second part, the first frame, the second frame and the third frame are axially overlapped to form the fan frame body, the third through hole corresponds to the fifth through hole, the fourth through hole corresponds to the sixth through hole, and the first part, the second part and the third part correspond to form the vibration reduction structures.

The fan frame with vibration damping structure, wherein: the plurality of vibration reduction structures are in geometric shapes and respectively define a vibration reduction structure virtual axis, the vibration reduction structure virtual axes of each vibration reduction structure are parallel or not parallel, the fan frame body defines a fan frame body virtual axis, and an included angle is defined between the fan frame body virtual axis and each vibration reduction structure virtual axis.

The fan frame with vibration damping structure, wherein: the plurality of vibration reduction structures are uniformly or non-uniformly arranged in a ring shape.

In order to achieve the above object, the present invention further provides a fan having the fan frame with a vibration reduction structure, comprising:

a stator set having a plurality of silicon steel sheets and a plurality of coils wound on the exterior of the silicon steel sheets, the stator set being sleeved on the exterior of the shaft tube;

a rotor set having a spindle, a hub and a permanent magnet, wherein the spindle and the hub are vertically assembled, the hub is provided with a plurality of blades on the outer ring, and the permanent magnet is arranged on the inner circumferential surface of the hub;

a bearing arranged in the shaft cylinder, and the mandrel is rotatably pivoted on the bearing.

The fan, wherein: the wing-shaped axial extension direction of the plurality of fan blades is opposite to the axial extension direction of the plurality of vibration reduction structures.

By means of the design of the invention, the structure of the fan frame body can be strengthened to reduce the amplitude of fundamental frequency vibration by 30-50%, so that the fan frame body with the vibration reduction structure and equipment (such as a server or a computer and the like) applying the fan frame body with the vibration reduction structure and the fan thereof can achieve better hard disk reading efficiency.

Drawings

Fig. 1a and 1b are schematic perspective views of a fan frame body with a vibration reduction structure according to a first embodiment of the present invention;

FIGS. 2a and 2b are sectional views of the fan frame body of the first embodiment having a vibration reduction structure of the present invention taken along line A-A of FIGS. 1a and 1 b;

fig. 3a and 3b are partially enlarged views of the vibration reduction structure of the first embodiment of the fan housing having the vibration reduction structure according to the present invention;

FIGS. 4a and 4b are sectional views taken along line A-A of FIGS. 1a and 1b, respectively, of a fan frame having a vibration reduction structure according to a second embodiment of the present invention;

FIGS. 5a and 5b are sectional views taken along line A-A of FIGS. 1a and 1b, respectively, of a fan housing having a vibration reduction structure according to a third embodiment of the present invention;

fig. 6a and 6b are perspective assembly views of the fan frame with vibration reduction structure according to the first embodiment of the present invention;

FIGS. 7a and 7B are sectional views taken along line B-B of FIGS. 6a and 6B of the first embodiment of the fan having the fan housing with a vibration reduction structure according to the present invention;

fig. 8a and 8b are schematic diagrams illustrating the fan blades of the fan frame with the vibration reduction structure according to the first embodiment of the present invention, and the extension directions of the vibration reduction structure are opposite.

Description of reference numerals: a fan frame body 10 having a vibration damping structure; a fan frame body 100; a first frame 100 a; a second frame 100 b; a third frame 100 c; a first port 101; a second port 102; a third port 103; a fourth port 104; a fifth port 105; a sixth port 106; a flow channel 107; a bottom portion 108; a shaft 1081; a stationary vane 1082; a vibration damping structure 109; the first portion 109 a; a second portion 109 b; the third portion 109 c; a spur structure 1091; a groove structure 1092; a stator group 20; a silicon steel sheet 201; a coil 202; a rotor set 30; a mandrel 301; a hub 302; fan blades 303; a permanent magnet 304; a bearing 40; a virtual axis X of the vibration reduction structure; a virtual axis Y of the fan frame body; the angle alpha.

Detailed Description

The above objects, together with the structural and functional features thereof, are accomplished by the preferred embodiments according to the accompanying drawings. The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention. The embodiments of the present invention are explained in detail by referring to the drawings and the embodiments herein, and the principle of the invention is explained.

Referring to fig. 1a, fig. 1b, fig. 2a, fig. 2b, fig. 3a, and fig. 3b, which are schematic perspective views of a fan frame with a vibration reduction structure according to a first embodiment of the present invention, and sectional views along line a-a of fig. 1a and fig. 1b and a partially enlarged view of the vibration reduction structure, as shown in the drawings, the fan frame 10 with a vibration reduction structure according to the present invention includes a fan frame body 100, in this embodiment, the fan frame body 100 is represented as a single fan frame, but is not limited thereto, and other variations are described below.

The fan frame body 100 has a first through hole 101, a second through hole 102, a flow channel 107 and a bottom 108, the first through hole 101 and the second through hole 102 are respectively disposed at the upper end and the lower end of the fan frame body 100, the flow channel 107 is disposed between the first through hole 101 and the second through hole 102 and is communicated with the first through hole 101 and the second through hole 102, the bottom 108 is disposed at the second through hole 102, the bottom 108 is vertically disposed with a shaft 1081 and a plurality of stationary vanes 1082, two ends of the plurality of stationary vanes 1082 are respectively connected with the bottom 108 and the fan frame body 100, the inner wall of the fan frame body 100 is annularly disposed with a plurality of vibration reduction structures 109, and the plurality of vibration reduction structures 109 are selected as either a convex structure 1091 or a concave structure 1092.

The damping structures 109 are geometric, and in the embodiment, the damping structures 109 are parallelograms, but not limited thereto, and in other embodiments, the damping structures 109 may be other rectangles, circles, ellipses, or other combinations. The damping structures 109 define a damping structure virtual axis X, in the present embodiment, the damping structure virtual axes X of each damping structure 109 are shown as being parallel to each other, and in other embodiments, the damping structure virtual axes X of each damping structure 109 can also be shown as being non-parallel to each other. The fan frame body 100 defines a fan frame body virtual axis Y, and an included angle α is defined between the fan frame body virtual axis Y and the damping structure virtual axis X, and the included angle α is an included angle of 1 degree to 179 degrees or 181 degrees to 359 degrees. In the present embodiment, the damping structures 109 are shown as a uniform ring-shaped arrangement, i.e. each damping structure 109 is spaced apart by the same distance, in other embodiments, the damping structures 109 may also be shown as a non-uniform ring-shaped arrangement.

By means of the design of the present invention, the arrangement of the plural vibration damping structures 109 can strengthen the structure of the fan frame body 100, reduce the amplitude of the fundamental frequency vibration by 30-50%, and further make the equipment (such as IT equipment or communication equipment, home and audio-visual equipment and industrial equipment, such as a server or a computer, etc.) applying the fan achieve better hard disk reading efficiency or reduce the equipment vibration to increase the stability.

Please refer to fig. 4a and 4b, which are sectional views taken along line a-a of fig. 1a and 1b of a fan frame with a vibration damping structure according to a second embodiment of the present invention, and refer to fig. 1a, 1b, 2a, 2b, 3a and 3b, as shown in the figures, the structure and function of the fan frame body 100 are the same as those of the first embodiment, and therefore will not be described herein again, but the present embodiment is different from the first embodiment in that the fan frame body 100 has a plurality of frames, the plurality of frames are axially overlapped to form the fan frame body 100 and the plurality of vibration damping structures 109, and each axially overlapped frame can be combined by means of screw locking, engaging structure or injection molding.

In the present embodiment, the plurality of frames of the fan frame body 100 are shown as having a first frame 100a and a second frame 100b, the first through hole 101 is formed at an upper side of the first frame 100a, a third through hole 103 is formed at a lower side of the first frame 100a, the second through hole 102 is formed at a lower side of the second frame 100b, and a fourth through hole 104 is formed at an upper side of the second frame 100b, and the first frame 100a and the second frame 100b are different in material.

The plurality of vibration damping structures 109 have a first portion 109a and a second portion 109b, the first portion 109a is formed on the first frame 100a, the second portion 109b is formed on the second frame 100b and corresponds to the first portion 109a, the first frame and the

second frame

100a, 100b are axially overlapped to form the fan frame body 100, the third opening 103 of the first frame 100a corresponds to the fourth opening 104 of the second frame 100b, and the first portion 109a and the second portion 109b correspond to form the vibration damping structure 109. Since the first frame 100a and the second frame 100b are made of different materials, for example, the first frame 100a is made of PBT and the second frame 100b is made of PA66, the resonance of the first and

second frames

100a, 100b can be further reduced and the noise can be reduced because the vibration frequencies of the different materials are also different.

Please refer to fig. 5a and 5b, which are sectional views taken along line a-a of fig. 1a and 1b of a fan frame with a vibration damping structure according to a third embodiment of the present invention, and refer to fig. 4a and 4b, as shown in the figures, part of the structure and function of the fan frame body in this embodiment are the same as those of the second embodiment, and therefore will not be described herein again, but the difference between the present embodiment and the second embodiment is that the plurality of frames of the fan frame body 100 are further represented as a third frame 100c, a fifth opening 105 is formed on the upper side of the third frame 100c, a sixth opening 106 is formed on the lower side of the third frame 100c, and the first frame 100a, the second frame 100b and the third frame 100c are made of different materials.

The plurality of vibration damping structures 109 further have a third portion 109c, the third portion 109c is formed on the third frame 100c, an upper portion of the third portion 109c corresponds to the first portion 109a, a lower portion of the third portion 109c corresponds to the second portion 109b, the first frame, the second frame, the

third frame

100a, 100b, 100c are axially overlapped to form the fan frame body 100, the third port 103 corresponds to the fifth port 105, the fourth port 104 corresponds to the sixth port 106, and the first portion 109a, the second portion 109b and the third portion 109c correspond to the vibration damping structure 109. Since the first frame 100a, the second frame 100b and the third frame 100c are made of different materials, for example, the first frame 100a is made of PBT, the second frame 100b is made of PA66, and the third frame 100c is made of PPE, and the vibration frequencies of the different materials are different, the resonance of the first, second and

third frames

100a, 100b and 100c can be further reduced, and the noise can be reduced.

Referring to fig. 6a, fig. 6B, fig. 7a, and fig. 7B, which are a perspective assembly view of a fan according to a first embodiment of the present invention and a B-B line cross-sectional view of fig. 6a and fig. 6B, and referring to fig. 1a, fig. 1B-fig. 5a, and fig. 5B, as shown in the drawings, the fan of the present embodiment may be applied to any one of the first to third embodiments of the fan frame having the vibration reduction structure, and the technical features disclosed in the foregoing embodiments will not be described again. The fan includes a stator set 20, a rotor set 30 and a bearing 40.

The stator assembly 20 has a plurality of silicon steel sheets 201, a plurality of coils 202 are wound on the exterior of the plurality of silicon steel sheets 201, and the stator assembly 20 is sleeved on the exterior of the shaft sleeve 1081. The rotor assembly 30 has a spindle 301, a hub 302 and a permanent magnet 304, the spindle 301 and the hub 302 are vertically assembled, and the hub 302 is provided with a plurality of blades 303 on the outer ring. The bearing 40 is disposed inside the shaft tube 1081, and the spindle 301 is rotatably pivoted to the bearing 40, so that the permanent magnet 304 corresponds to the outer surface of the silicon steel sheets 201 at an interval.

Referring to fig. 8a and 8b, the extending directions of the blades and the damping structures are opposite, and the wing-shaped axial extending direction of the plurality of blades 303 is opposite to the axial extending direction of the plurality of damping structures 109. The structure of the fan frame body 100 can be strengthened by the arrangement of the plurality of vibration reduction structures 109, and the amplitude of the fundamental frequency vibration generated when the rotor rotates is reduced by 30-50%, so that the equipment (such as IT equipment or communication equipment, home and audio-visual equipment and industrial equipment, and the like, such as a server or a computer, and the like) applying the fan can achieve better hard disk reading efficiency or reduce the equipment vibration to increase the stability. In addition, the plurality of vibration reduction structures 109 also change the interaction between the free ends of the plurality of fan blades 303 and the fan frame body 100, thereby further reducing fundamental frequency resonance and noise.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.

Claims

1. A fan frame with a vibration reduction structure is characterized by comprising:

a fan frame body, which is provided with a first through hole, a second through hole, a flow channel and a bottom part, wherein the first through hole and the second through hole are respectively arranged at the upper end and the lower end of the fan frame body, the flow passage is arranged between the first through hole and the second through hole and communicated with the first through hole and the second through hole, the bottom is arranged at the second opening, a shaft barrel and a plurality of stationary blades are vertically arranged at the bottom, two ends of the plurality of stationary blades are respectively connected with the bottom and the fan frame body, the inner wall of the fan frame body is arranged in a ring shape and is provided with a plurality of vibration reduction structures which can strengthen the structure of the fan frame body and reduce the amplitude of fundamental frequency vibration by 30-50%, the plurality of vibration reduction structures are selected to be convex structures or concave structures, the vibration reduction structures are parallelograms, on the cross section of the convex body structure, the size of the inner wall perpendicular to the fan frame body is smaller than the size of the inner wall parallel to the fan frame body.

2. The fan frame body with a vibration damping structure according to claim 1, wherein: the fan frame body has a plurality of frames, and the plurality of frames are axially overlapped to form the fan frame body and the plurality of vibration reduction structures.

3. The fan frame body with a vibration damping structure according to claim 2, wherein: the plurality of frames are provided with a first frame and a second frame, the first through opening is formed on the upper side of the first frame, a third through opening is formed on the lower side of the first frame, the second through opening is formed on the lower side of the second frame, a fourth through opening is formed on the upper side of the second frame, and the first frame and the second frame are made of different materials.

4. The fan frame body with a vibration damping structure according to claim 3, wherein: the plurality of vibration reduction structures are provided with a first part and a second part, the first part is formed on the first frame, the second part is formed on the second frame and corresponds to the first part, the first frame and the second frame are axially overlapped to form the fan frame body, the third through hole corresponds to the fourth through hole, and the first part and the second part correspondingly form the vibration reduction structures.

5. The fan frame body with a vibration damping structure according to claim 3, wherein: the plurality of frames also have a third frame, a fifth port is formed on the upper side of the third frame, a sixth port is formed on the lower side of the third frame, and the first frame, the second frame and the third frame are made of different materials.

6. The fan frame body with a vibration damping structure according to claim 5, wherein: the plurality of vibration reduction structures are provided with a first part, a second part and a third part, the first part is formed on the first frame, the second part is formed on the second frame, the third part is formed on the third frame, the upper part of the third part corresponds to the first part, the lower part of the third part corresponds to the second part, the first frame, the second frame and the third frame are axially overlapped to form the fan frame body, the third through hole corresponds to the fifth through hole, the fourth through hole corresponds to the sixth through hole, and the first part, the second part and the third part correspond to form the vibration reduction structures.

7. The fan frame body with a vibration damping structure according to claim 1, wherein: the plurality of vibration reduction structures are respectively defined with a vibration reduction structure virtual axis, the vibration reduction structure virtual axes of each vibration reduction structure are parallel or not parallel, the fan frame body is defined with a fan frame body virtual axis, and an included angle is defined between the fan frame body virtual axis and each vibration reduction structure virtual axis.

8. The fan frame body with a vibration damping structure according to claim 1, wherein: the plurality of vibration reduction structures are uniformly or non-uniformly arranged in a ring shape.

9. A fan having the fan housing with a vibration damping structure according to any one of claims 1 to 8, comprising:

10. The fan as claimed in claim 9, wherein: the wing-shaped axial extension direction of the plurality of fan blades is opposite to the axial extension direction of the plurality of vibration reduction structures.