CN101446294B

CN101446294B - Radiator fan

Info

Publication number: CN101446294B
Application number: CN2007102026769A
Authority: CN
Inventors: 朱锦宏
Original assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Current assignee: Hongfujin Precision Industry Shenzhen Co Ltd; Hon Hai Precision Industry Co Ltd
Priority date: 2007-11-26
Filing date: 2007-11-26
Publication date: 2012-07-18
Anticipated expiration: 2027-11-26
Also published as: CN101446294A

Abstract

The invention relates to a radiator fan which comprises a casing, a stator fixed in the casing, a lower bearing contained at the lower part of the casing and a rotor installed in the casing. The rotor comprises a rotating shaft and a fan blade group combined to the upper part of the rotating shaft; the lower bearing is sleeved at the lower part of the rotating shaft; the radiator fan also comprises an upper bearing contained at the upper part of the casing; and the upper bearing is sleeved at the upper part of the rotating shaft. Compared with the prior art, the radiator fan is provided with two bearings which are respectively sleeved at the upper part and the lower part of the rotor bearing and can play the role of supporting the upper part and the lower part of the rotor respectively when the rotor rotates, so that can prevent the fan blade group from generating vibration when the fan blade group is in high speed rotation, and the working noise of the fan can be well controlled. In addition, the structure damage of the fan caused by the vibration of the rotor can be avoided due to no vibration, so the service life of the fan is correspondingly prolonged.

Description

Radiation fan

Technical field

The present invention relates to a kind of radiation fan, be meant a kind of radiation fan that is used for electronic element radiating especially.

Background technique

Along with the development of electronic industry, the performance of electronic component constantly promotes in recent years, and arithmetic speed is more and more faster; The arithmetic speed of its inside chip group constantly promotes, and number of chips constantly increases, the also corresponding increase of the heat that is distributed during chip operation; If these heats are not in time distributed,, the arithmetic speed of electronic component is reduced with the performance that greatly influences electronic component; Along with the continuous accumulation of heat, also possibly burn electronic component, therefore must dispel the heat to electronic component.

For this reason, a radiation fan is installed near electronic component usually, the air-flow that produces through the electric fan rotation directly blows to electronic component or is installed on the radiator on the electronic component, and it is dispelled the heat effectively.Traditional fan generally comprises a shell, and is bonded to the bearing and that the stator, in the shell is contained in the outer casing underpart and is installed on the rotor on the bearing.Said rotor comprises that then a rotating shaft and is fixed on the flabellum group on rotating shaft top.Said bearing housing is located at bottom and the support rotor rotation of rotating shaft.After the fan energising, rotor rotates through the magnetic force of stator, thereby produces air-flow.

But because this kind fan has only single bearing housing to be located at the bottom of rotating shaft, when rotor rotated, the bottom that it can only countershaft was carried out spacing.If the rotating speed of fan is too fast,, is easy to make the flabellum group to vibrate, thereby causes the operating noise of fan to increase considerably because the top of rotating shaft has no object to support.In addition, this vibration also may cause the structural damage of fan, thereby reduces the life-span of fan.

Summary of the invention

In view of this, be necessary to provide a kind of vibrative fan that under high speed conditions, is not easy in fact, wherein this fan has top and the bottom that two bearings are sheathed on its rotor shaft respectively.

A kind of radiation fan comprises that a shell, is fixed to the lower bearing and that stator, in the shell is contained in outer casing underpart and is installed on the rotor in the shell; Said rotor comprises a rotating shaft and is bonded to the flabellum group on this rotating shaft top; Said lower bearing sleeve is located at the bottom of said rotating shaft; Said radiation fan comprises that also one is placed in the upper bearing (metal) of said shell upper, and said upper bearing sleeve is located at the top of said rotating shaft.

Compared with prior art, radiation fan of the present invention has the upper and lower that two bearings are sheathed on the rotating shaft of rotor respectively, can when rotor rotates, play a supportive role to its upper and lower respectively, thereby prevent that the flabellum group from producing vibration when high speed rotating.Thus, the operating noise of fan can be well controlled.In addition, because not vibration can be avoided causing owing to the vibration of rotor the structural damage of fan, thereby correspondingly prolong the life-span of fan.

With reference to the accompanying drawings, in conjunction with specific embodiment the present invention is done further description.

Description of drawings

Fig. 1 is the longitudinal sectional drawing of radiation fan of the present invention.

Fig. 2 be radiation fan among Fig. 1 loam cake look up enlarged view.

Fig. 3 is the plan view that the radiation fan among Fig. 1 conceals loam cake.

Embodiment

Shown in Fig. 1-3; Radiation fan of the present invention is used for electronic component (figure does not show) is dispelled the heat, and it stator 20, one that comprises that a shell (figure is mark), is fixed in the shell places the rotor 30 in the shell versatilely and is placed in shell interior and a upper bearing (metal) 60 and lower bearings 50 support rotor 30 upper and lowers respectively.This upper bearing (metal) 60 can be the bearing of any kind well-known to those skilled in the art with lower bearing 50, such as ball bearing, glossy bearing or hydraulic bearing or the like.

See also Fig. 2 and Fig. 3, said shell comprises that a framework 10 and is installed on the loam cake 40 on this framework 10 separably.Said framework 10 comprises that a square lower plate 12, is parallel to the square upper plate 14 and a vertical annular sidewall 16 that connects upper plate 14 and lower plate 12 of lower plate 12.Said sidewall 16 surrounds the containing space 18 of a circle to accommodate rotor 30.Said upper plate 14 equates with the area of lower plate 12, and its four jiaos places offer four screws 120,140 around said containing space 18 respectively, supplies screw (figure does not show) to pass and said framework 10 is fixed on the corresponding construction (such as radiator or wind scooper).Said upper plate 14 goes out four grooves 142 that are communicated with above-mentioned containing space 18 to lower recess respectively in the position near four screws 140, keeps supplying to cover 40 embeddings.Each groove 142 is all approximate to be the isosceles right triangle structure, and the hypotenuse of per two relative grooves 142 in twos over against.A shrinkage pool 1420 is offered in the bottom of each groove 142, keeps supplying to cover 40 corresponding construction and buckle into.Each shrinkage pool 1420 has the rectangle part (figure is mark not) that a circular portion (figure is mark not) and is communicated with this circular portion and said containing space 18; Wherein said circular portion is positioned at the middle part of corresponding recesses 142, and rectangle part then extends inwardly to containing space 18 from this circular portion.

Please consult Fig. 1 in the lump, a chassis 122 is formed at said containing space 18 bottoms, and it comprises that a circular plate body (figure is mark not) reaches the wall portion (figure is mark not) that is formed at this plate body periphery vertically upward.Some crossbeams 123 (like Fig. 3) connect on wall portion to the sidewall 16 of said framework 10 on said chassis 122, thereby chassis 122 is fixed to the bottom of containing space 18.The cylinder 124 of one hollow 122 middle part extends from the chassis vertically upward, and its internal diameter is slightly larger than the external diameter of said lower bearing 50, so that this lower bearing 50 is placed in wherein; Level extend internally out cramp 128 of a ring-type in its underpart is used to carry said lower bearing 50 and is interlocked with the corresponding construction of rotor 30.The supporting portion 126 of one ring-type is formed on the said plate body and is resisted against the outer wall of cylinder 124.The height of said supporting portion 126 is slightly larger than the height on said chassis 122 and much smaller than the height of said cylinder 124, it is used to carry stator 20 and is fixed in framework 10 inside.

Said stator 20 comprises a base plate 22 and some field coils 24 that is incorporated on this base plate 22.Said stator 20 is sheathed on the said cylinder 124 and connects with the top of said supporting portion 126, and its top is a little less than the top of said cylinder 124.This stator 20 is used for after energising, producing alternating magnetic fields, thereby drives rotor 30 rotations.

Said rotor 30 is movably arranged on the said cylinder 124, and it comprises a wheel hub 32, somely is fixed to the rotating shaft 36 that magnet 38 and in the wheel hub 32 runs through wheel hub 32 from the outward extending blade 34, of wheel hub 32 periphery radiation.The sidewall (figure is mark not) that said wheel hub 32 comprises a plectane (figure is mark not) and extends vertically downward from this plectane periphery.Caving in straight down and the recess 320 (like Fig. 3) of a circle in the middle part of said plectane, is used for the corresponding construction of ccontaining loam cake 40.Said blade 34 is bonded on the sidewall of said wheel hub 32, and itself and wheel hub 32 are formed the flabellum groups (figure is mark) of said fan jointly.Said magnet 38 in the form of a ring, its external diameter equates with the internal diameter of said wheel hub 32 sidewalls, its height equates with the height of wheel hub 32 sidewalls; Thus; In the time of in magnet 38 is fixed in wheel hub 32, will fit with the inboard of said wheel hub 32 sidewalls in its outside, and its top will contact with the plectane of wheel hub 32.Said rotating shaft 36 runs through the middle part of the plectane of said wheel hub 32, and its top extends beyond the bottom surface of said recess 320 and inserts in the loam cake 40; Its underpart is then inserted in the said lower bearing 50 and is supported said flabellum group; Its part near the bottom is offered the annular recess (figure is mark) that is interlocked with the cramp 128 of said cylinder 124, in case spline axle 36 landings in the cylinder 124.

Please consult Fig. 2 once more; Said loam cake 40 is fixed on the framework 10 through said screw, four ribs 48 that it comprises that the support 42, of a ring-type is formed at body 46 that the baffle plate 44 of the circle at these support 42 middle parts, extends from baffle plate 44 vertically downward and baffle plate 44 is connected to support 42.Said support 42 roughly is square; It is joined and is formed by four rectangular (figure is mark not) first place; Wherein per two adjacent rectangular joints form a projection 420 vertically downward, be used to insert in the shrinkage pool 1420 of groove 142 of upper plate 14 of said framework 10, thereby loam cake 40 is fixed on the framework 10.The two relative rectangular straight structures that are, other two relative rectangular then parts bend.Said rib 48 is connected to the corresponding rectangular middle part of support 42 outer rim of said baffle plate 44; Wherein with the bending other two rectangular two ribs 48 that are connected be straight structure and with two straight rectangular paralleling; Be bending structure and roughly parallel with two ribs 48 of straight two rectangular connections with other two ribs of bending; Thus, this four rib 48 space 480 quarterings that support 42 and 44 one common peripheral of baffle plate are set out.The diameter of said baffle plate 44 is slightly less than the diameter of the plectane of said wheel hub 32, and greater than the external diameter of said body 46, on the basis that guarantees firm body 46, to increase the area in space 480 to greatest extent, makes more air-flow can pass loam cake 40.Said body 46 is a hollow structure, and its inner columned containing space 460 that forms is to be contained in (like Fig. 1) in it with said upper bearing (metal) 60.The height of this body 46 is slightly larger than the degree of depth of said wheel hub 32 recesses 320; Thus; When the support of loam cake 40 42 embedded in the groove 142 of upper plate 14 of frameworks 10, its body 46 made said upper bearing (metal) 60 be sheathed on the top of said rotating shaft 36 and carry out spacing to it with partly being contained in the recess 320 of said wheel hub 32; At this moment, this upper bearing (metal) 60 is separated by said flabellum group with lower bearing 50.

When fan work, but because the top of upper bearing (metal) 60 countershafts 36 is carried out spacingly, even the rotating speed of flabellum group is higher, under the supporting effect of upper bearing (metal) 60, it also is not easy to vibrate.Thus, the noise that is produced in the time of can reducing fan work effectively.In addition, owing to rotor 30 vibrations cause the impaired situation of fan structure to avoid, the life-span of fan can correspondingly obtain prolonging.

Claims

1. radiation fan; It comprises that a shell, is fixed to the lower bearing and that stator, in the shell is contained in outer casing underpart and is installed on the rotor in the shell; Said rotor comprises a rotating shaft and is bonded to the flabellum group on this rotating shaft top, and said flabellum group comprises a wheel hub and some blades that goes out from the radiation of wheel hub periphery, and said lower bearing sleeve is located at the bottom of said rotating shaft; It is characterized in that: said radiation fan comprises that also one is placed in the upper bearing (metal) of said shell upper; Said upper bearing (metal) and lower bearing are separated by said wheel hub, and said upper bearing (metal) and lower bearing are positioned at said wheel hub both sides, and said rotating shaft runs through said wheel hub; The top of said rotating shaft extends beyond said wheel hub, and said upper bearing sleeve is located at the top of said rotating shaft.

2. radiation fan as claimed in claim 1 is characterized in that: said shell comprises that a framework and is fixed to the loam cake on the framework separably, and said lower bearing is placed in the said framework, and said upper bearing (metal) is placed in the loam cake.

3. radiation fan as claimed in claim 2 is characterized in that: the middle part of the end face of said wheel hub goes out a recess to lower recess, and the top of said rotating shaft extends beyond the bottom surface of this recess.

4. radiation fan as claimed in claim 3; It is characterized in that: said loam cake comprise an annular support, be formed at the baffle plate of this mid-stent, from this baffle plate to the body that extends below and some baffle plate is connected to the rib of support, said upper bearing (metal) is placed in the said body.

5. radiation fan as claimed in claim 4 is characterized in that: said baffle plate is rounded, and its diameter is less than the external diameter of said wheel hub and greater than the external diameter of said body.

6. radiation fan as claimed in claim 4 is characterized in that: the body of said loam cake is resisted against the bottom surface of said recess and partly is contained in the recess.

7. like each described radiation fan of claim 4 to 6; It is characterized in that: said framework comprises that lower plate and that a upper plate, is parallel to upper plate connects the sidewall of upper plate and lower plate, and said rotor and stator are contained in the containing space that said sidewall surrounds.

8. radiation fan as claimed in claim 7 is characterized in that: said upper plate is at four grooves of offering the support embedding that supplies said loam cake near its position of four jiaos respectively.