CN2898389Y

CN2898389Y - Laminated fan-leaf structure

Info

Publication number: CN2898389Y
Application number: CN 200620115952
Authority: CN
Inventors: 赖澄辉
Original assignee: Enermax Technology Corp
Current assignee: Enermax Technology Corp
Priority date: 2006-05-23
Filing date: 2006-05-23
Publication date: 2007-05-09
Anticipated expiration: 2016-05-23

Abstract

The utility model relates to a multilayer fan blades structure, comprising a fan blade hub and a plurality of fan blades positioned around the hub. The fan blades, which are at least divided into a first blade group and a second blade group, are radial set around the fan blade hub, wherein, a fixed ring is positioned between a first blade group and a second blade group; each blade root is positioned around the fan blade hub with equal distance in between while each blade top is fixed on the inner edge of the fixed ring; each fan tail is positioned on the outer edge of the fixed ring. Therefore, same air volume is produced inside or outside of gas field caused by the fan blades; different air pressures are produced in heat dissipation areas corresponding to each fan blade group.

Description

The multilayer blade structure

Technical field

The utility model refers in particular to a kind of multilayer blade structure that the multilayer blade is arranged that has about a kind of radiator blade structure.

Technical background

Apply to the radiator of computer system now, be divided into two kinds of passive type and active radiators according to its radiating mode, wherein, the passive heat radiation device is to utilize to contact with heater and to utilize to design radiator and have the area that contacts with air of increase, and is sent to heat energy in the atmosphere efficiently; Active radiator then is a thermal capacitance long-pending (absorptivity of heat) of utilizing flowing medium (as: water or air), directly absorb the heat energy of passive heat radiation device or heater, the temperature of electronic equipment must be controlled in certain scope, and the reason temperature is too high and work as machine, therefore, on principle, the heat radiation and the cooling-down effect of collocation active simultaneously and passive radiator competence exertion the best.

And air cooled heat sinks is one of active radiator of wide usefulness now, mainly be to utilize the thermal capacitance of air long-pending, heat energy by taking away on the passive heat radiation device, and is reached the effect that improves heat dissipation rate, and common structure then is to utilize the fan structure of flabellum rotating band moving air flow.The passive heat radiation device of wide usefulness is overlapped by the large-area fin of multi-disc tool to form, seeing through each fin absorbs the heat energy of heater and promotes the area that heat energy contacts with air, and the air-flow that further cooperates aforementioned fan structure to produce, and heat energy is taken away fast by the fin surface, reach high efficiency heat radiation and cooling-down effect.

With regard to fan, the performance quality depends primarily on air quantity and the blast that is produced, wherein airflow meter is shown interior volume of air by fan outlet of unit time, with regard to radiating effect, the big more radiating effect relatively of air quantity is just good more, and its Wind Coverage Calculation mode (air quantity=wind speed * mistake wind area) can learn that the air quantity of fan size depends on the height (being decided by rotation speed of the fan) and the size of crossing wind area (interior volume of air by blade pitgh of unit time) of wind speed.

And blast is represented the pressure difference between fan outlet and wind inlet, if with flabellum condition in the same manner (is blade tilt, spacing and identical length are together down), it between blast and the air quantity relation constrained each other, that is, the air quantity that (exhaust outlet pressure equals wind inlet pressure) fan produces when blast is 0 is for maximum, relatively, when blast was big more, the air quantity that is produced certainly will be more little, if with flabellum rotating speed in the same manner, the blast size depends on the shape of each blade of flabellum, area, due to length cooperatively interacts, basically, when the blast that produces when flabellum is big more, represent that promptly air supplying distance is short more, otherwise air supplying distance is then long more.

Only, the utilization fan is assisted the mode of each fin radiating and cooling, it is reported and also can't produce even gas field, its reason is: be arranged in wheel hub 12 blade 11 (as shown in Figure 1) on every side, when rotation, though the tip 111 of blade 11 and root 112 are synchronously along with wheel hub 12 rotations, vane tip 111 axial velocities that are positioned at flabellum 10 outsides certainly will be greater than the axial velocity (as shown in Figure 2) of blade 11 roots 112, the axial velocity profile that causes air-flow to enter fan differs, and enclose in the flow field of causing fan to produce and peripheral air quantity inhomogeneous, in addition, the spacing of each vane tip 111 is also greater than each root of blade spacing, thereby causes the wind area inequality.Therefore, with regard to above-mentioned 2, the inside and outside air quantity that encloses of the gas field that flabellum produced certainly will be serious uneven, causes the pairing heat dissipation region of fan to lower the temperature equably.

Therefore, how to improve the problem that air quantity that aforesaid flabellum produces differs, the problem of studying intensively for the utility model.

Summary of the invention

The purpose of this utility model is to provide a kind of multilayer blade structure, see through the vane group of radially being located at wheel hub many groups of different blade tilts, spacing, length and quantity collocation on every side, and make the inside and outside effect of enclosing air quantity convergence unanimity of the air velocity distribution of flabellum generation.

For reaching above-mentioned purpose, a kind of multilayer blade structure of the utility model, comprise a flabellum wheel hub and several pieces and be positioned at blade around the wheel hub, it is characterized in that: set blade around this flabellum, divide into first vane group and second group of vane group, and respectively organize blade radially be positioned in regular turn this wheel hub around, and has a fixing ring body between vane group, wherein, each root of blade of this first vane group is located equidistantly this flabellum wheel hub periphery, and each vane tip then is separately fixed at this fixedly ring body inner edge, and each blade afterbody of this second vane group then is positioned at this fixedly outer rim of ring body.

Wherein, have one between each blade of this second flabellum group and strengthen rib.

The utility model effect:

See through the different collocation design of blade tilt, shape, area, sheet number and spacing of each flabellum group, make the inside and outside air quantity convergence that encloses of the air velocity distribution that flabellum produces identical, or look the pairing heat dissipation region of vane group, produce suitably air quantity.

Again, between each blade surface of these flabellum groups, can set up one and strengthen rib,, produce vibrations when avoiding the blade rotation, cause problem on deformation such as angle of attack change in order to strengthen each blade strength.

According to aforesaid structure, wherein the blast size of fan generation influences the flabellum air supplying distance.

Produce big blast if set aforesaid a certain flabellum group, and make air-flow must pass fin pitch, each blade of this flabellum group changes the shape of blade, the setting value of area and length, make this flabellum group produce bigger blast, to improve the thermoconvection effect between fin, and when aforesaid a certain flabellum group, need directly to concentrate and dispel the heat apace and when lowering the temperature at heater, the blade of this flabellum group changes the shape of blade, area, length and the setting value that strengthens blade pitgh, the blast that the flabellum group is produced reduces and produces bigger air quantity, to promote the rate of heat exchange of air.

The utility model beneficial effect: according to said structure, it is inconsistent because of the axial velocity and the blade pitgh of vane tip and root that the utility model has overcome traditional flabellum, and the uneven defective of air-flow that produces, see through first vane group and second vane group and radially be arranged at flabellum wheel hub periphery, and reach the air velocity distribution effect of uniform outside, also can be at the pairing heat dissipation region demand of these flabellum groups, and blade tilt, quantity, length or the spacing of vane group are done different collocation, strengthened the blast that is produced.

Relevant the utility model is above-mentioned purpose, and the technological means that is adopted and complementary work thereof are imitated, and lift two preferred embodiments now, and cooperate graphic be illustrated as follows.

Description of drawings

Fig. 1: be the floor map of known flabellum;

Fig. 2: be the side view of known flabellum;

Fig. 3: be the schematic perspective view of the utility model the 1st embodiment's multilayer blade structure;

Fig. 4: be the floor map of the utility model the 1st embodiment's multilayer blade structure;

Fig. 5: be the schematic perspective view of the utility model the 1st embodiment's multilayer blade structure, show and establish a strengthening rib between each blade; And

Fig. 6: be the schematic perspective view of the utility model the 2nd embodiment's multilayer blade structure.

Embodiment

See also Fig. 3, Fig. 4, Fig. 3 is the schematic perspective view of the utility model the 1st embodiment's multilayer blade structure; Fig. 4 is the floor map of the utility model the 1st embodiment's multilayer blade structure.

As shown in the figure, the 1st embodiment of the present utility model provides a kind of multilayer blade structure, comprise: a flabellum wheel hub 20 and several pieces are located at the blade around the wheel hub 20, wherein, flabellum wheel hub 20 is hubbed at one and has (not shown) in the rotating shaft of stator, and these wheel hub 20 inside then are provided with one and are surrounded on this stator rotor on every side, promoting wheel hub 20 through stator generation magnetic field rotates in rotating shaft, make the blade of being located at around the wheel hub 20 drive air and produce an axial flow, and to fins group or other heaters carry out the radiating and cooling (not shown), major character of the present utility model is: these blades are divided into first vane group 211 and the second flabellum group 212 at least, and radially be arranged at wheel hub 20 (as Fig. 3 to shown in Figure 4) in regular turn, and be provided with a fixing ring body 22 between first vane group 211 and the second flabellum group 212, wherein, each blade 2110 root of first vane group 211 equidistantly are located at around the flabellum wheel hub 20, fixedly ring body 22 inner edges then are fixed at its blade 2110 tips, each blade 2120 of the second flabellum group 212 then equidistantly is located at the fixedly outer rim of ring body 22, when rotation, the axial velocity of second vane group 212 certainly will be greater than first vane group 211, therefore, then need each blade 2110 spacing of first vane group 211 are suitably strengthened according to Wind Coverage Calculation mode (air quantity=wind speed * crosses the wind area), increased the wind area by this, or each blade 2120 spacing of second vane group 212 are suitably dwindled, use and reduced the wind area, make first vane group 211 and second vane group 212 obtain the identical air quantity of convergence, reach the purpose (as shown in Figure 4) of radiating effect unanimity.

The utility model the 1st embodiment's multilayer blade structure, when implementing, because first and second vane group 211,212 along with flabellum wheel hub 20 rotates synchronously, produce the axial flow (not shown) to drive air, though, the rotating speed of these flabellum groups is identical, but need special consideration to be positioned at second vane group 212 of flabellum periphery when rotation, its axial velocity certainly will be greater than the axial velocity that is positioned at first vane group 211 of enclosing, so, learn by Wind Coverage Calculation mode (air quantity=wind speed * crosses the wind area), the wind area excessively of first vane group 211 is bound to need be greater than second vane group 212, could with reach the identical effect of air quantity that these flabellum groups produce, therefore, what first vane group 211 of present embodiment designed crosses the wind area greater than second vane group 212, can reach in the flabellum, effect person's (as shown in Figure 4) of the peripheral air quantity convergence unanimity that produces.

See also Fig. 5, Fig. 5 is the schematic perspective view of the utility model the 2nd embodiment's multilayer blade structure, is shown between each blade of second vane group and establishes a strengthening rib.

As shown in the figure, for the blade 2120 that solves the second flabellum group 212 drives the vibrations that air-flow caused, cause blade 2120 distortion, and change problems such as its angle of attack, in between the surface of each blade 2120, set up a strengthening rib 213, in order to strengthen each blade 2120 intensity, to keep the angle of attack angle of blade 2120.

See also Fig. 6, Fig. 6 is the stereogram of the utility model the 2nd embodiment's multilayer blade structure.

The utility model remove can see through first vane group 211 cross the wind area greater than second vane group 212, produce the identical air quantity except that reaching each vane group, also can be required at heater or fins group moulding, set different blade conditions, for example: when the spacing of fin is narrow, pairing flabellum group must produce bigger air pressure, just can enter narrow ground fin pitch, at this moment, this vane group can further be set blade tilt, length, spacing or blade quantity (shown in the blade 2110 of first vane group 211 of Fig. 6), make its generation penetrate fin pitch, thereby improve the rate of heat exchange between fin than barometric pressure; Carry out wherein radiating and cooling if need at a certain heater, or during the fin pitch broad, then produce the Blade Design of big air quantity emphatically, so, pairing vane group can be set less blade tilt to obtain less blast, or increase the designs such as spacing of each blade, to produce big air output.

Only the above only is two preferred embodiments of the present utility model, is not to be used for limiting the scope that the utility model is implemented.So and all equalizations of doing according to described shape structure characteristics of the utility model claim and spirit change and modify, and all should be contained in the claim of the present utility model.

Claims

1. multilayer blade structure, comprise a flabellum wheel hub and several pieces and be positioned at blade around the wheel hub, it is characterized in that: set blade around this flabellum, divide into first vane group and second group of vane group, and respectively organize blade radially be positioned in regular turn this wheel hub around, and has a fixing ring body between vane group, wherein, each root of blade of this first vane group is located equidistantly this flabellum wheel hub periphery, and each vane tip then is separately fixed at this fixedly ring body inner edge, and each blade afterbody of this second vane group then is positioned at this fixedly outer rim of ring body.

2. according to the described multilayer blade structure of claim 1, it is characterized in that: have one between each blade of this second flabellum group and strengthen rib.