CN212055196U

CN212055196U - High-efficiency low-noise fan

Info

Publication number: CN212055196U
Application number: CN202020422448.3U
Authority: CN
Inventors: 胡佳
Original assignee: Wuhan Wanzhida Intelligent Technology Co ltd
Current assignee: Wuhan Wanzhida Intelligent Technology Co ltd
Priority date: 2020-03-29
Filing date: 2020-03-29
Publication date: 2020-12-01
Anticipated expiration: 2030-03-29

Abstract

The utility model discloses a high-efficiency low-noise fan, which comprises a frame component, a rotating component and a stator component, wherein the frame component comprises an outer frame, a sleeve and a bearing, the sleeve is vertically arranged on the outer frame, and the bearing is fixedly sleeved on the inner wall of the sleeve; the rotating assembly comprises an impeller, a rotating shaft, a casing and a plurality of magnetic rings, the impeller is fixedly sleeved on the casing, the rotating shaft and the casing are coaxially arranged, the upper end of the rotating shaft is fixedly connected on the casing, the lower end of the rotating shaft penetrates through the bearing, the magnetic rings are respectively and fixedly sleeved on the inner wall of the casing, and two adjacent magnetic rings are mutually abutted; the stator assembly comprises a stator and a winding, the stator is fixedly sleeved on the outer wall of the sleeve, and the winding is fixedly installed on the stator. The utility model discloses the magnet steel vortex that produces when having reduced the high-speed operation of fan generates heat, has avoided the magnet steel demagnetization risk to appear, and power and efficient moreover, the radiating effect is good.

Description

High-efficiency low-noise fan

Technical Field

The utility model belongs to the technical field of the fan, more specifically relates to a high efficiency low noise fan.

Background

With the technical development in the fields of power electronics, integrated circuits, electronic communications, and the like, the package size of large-scale integrated circuits is smaller and smaller, and thus the heat density is increased.

Due to the use of highly integrated electronic devices, the individual functional components are becoming more and more compact, and eventually the heat dissipation pressure of the individual functional components is becoming greater, which all pose new challenges to conventional heat dissipation fans.

The fan is limited by the requirement of the market on energy conservation of products, the ventilation quantity is not increased simply by increasing the energy consumption and increasing the rotating speed of the fan, and in addition, the rotating speed of the fan used at present is increased to a higher level, and serious noise problems can be caused by further increasing the rotating speed, so that the requirement of optimizing the efficiency of the fan to meet the requirement of high heat dissipation air quantity is urgently needed.

SUMMERY OF THE UTILITY MODEL

To the above defect of prior art or improve the demand, the utility model provides a high efficiency low noise fan, its power density and efficiency promote by a wide margin, and heat dispersion is good moreover.

To achieve the above objects, according to one aspect of the present invention, there is provided a high efficiency low noise fan including a frame assembly, a rotating assembly, and a stator assembly, wherein,

the frame assembly comprises an outer frame, a sleeve and a bearing, the sleeve is vertically arranged on the outer frame, and the bearing is fixedly sleeved on the inner wall of the sleeve;

the rotating assembly comprises an impeller, a rotating shaft, a casing and a plurality of magnetic rings, the impeller is fixedly sleeved on the casing, the rotating shaft and the casing are coaxially arranged, the upper end of the rotating shaft is fixedly connected to the casing, the lower end of the rotating shaft penetrates through the bearing, the magnetic rings are respectively fixedly sleeved on the inner wall of the casing, and two adjacent magnetic rings are mutually abutted;

the stator assembly comprises a stator and a winding, the stator is fixedly sleeved on the outer wall of the sleeve, and the winding is fixedly installed on the stator.

Preferably, the rotor assembly further comprises a clamp spring, a clamp spring groove is formed in the lower end of the rotating shaft, the clamp spring is clamped in the clamp spring groove, and the clamp spring is located below the bearing.

Preferably, the two bearings are arranged up and down, a compression spring is arranged between the two bearings, and the upper end and the lower end of the compression spring are respectively abutted on one bearing.

Preferably, the number of blades of the impeller is odd.

Preferably, the upper end of the casing is provided with a plurality of through holes, the upper end of the impeller is respectively provided with cylinders at positions corresponding to the through holes on the casing, and the cylinders penetrate through the corresponding through holes on the casing and are fixed on the casing by hot melting riveting so as to prevent the impeller from falling off from the casing when rotating.

Preferably, the up end of impeller evenly is provided with a plurality of recesses to all be provided with balanced mud in these recesses, the lower extreme of impeller inner wall is equipped with annular ladder mouth, this annular ladder mouth with the outer disc of casing forms annular balancing tank altogether, is provided with balanced mud in this annular balancing tank.

Preferably, the inner wall of the outer frame is a cylindrical surface, when the impeller rotates, the airflow enters from the upper end of the space between the two blades of the impeller and flows out from the lower end, a gap exists between the blade tip of each blade and the inner wall of the outer frame, the gap is gradually reduced at the air inlet of the blade tip, and then the gap is constantly extended to the air outlet.

Preferably, the upper part of the blade tip of at least one blade is provided with a fish fin-shaped bulge, so that the blade tip reduces the generation of gas vortex and the noise.

Preferably, the circumferential section of the blade is enclosed by an upper sweeping curve and a lower sweeping curve, so that the blade is in a shape with a thick middle part and a thin air inlet and an air outlet.

Preferably, the casing adopts soft magnetic material to make, the magnetic ring is for bonding neodymium iron boron or the hot pressing neodymium iron boron that the radiation magnetizes makes.

Generally, through the utility model discloses above technical scheme who conceives compares with prior art, can gain following beneficial effect:

1) the utility model adopts the matching of the magnetic ring and the stator as the driving source, improves the starting efficiency, has high power density and efficiency, and adopts a plurality of magnetic rings to form a sectional structure, can reduce the heating of the magnetic steel eddy current generated during high-speed operation, and avoids the demagnetization risk of the magnetic steel;

2) the utility model discloses an optimize the spatial structure of blade for the efficiency of the mechanical energy conversion wind energy of fan improves by a wide margin, thereby obtains higher air volume, and the radiating effect is showing and is improving.

3) The utility model discloses an optimize the spatial structure of apex, the clearance of the inner wall of rational arrangement apex and outer frame has reduced the gas vortex effect of apex department, has reduced the noise when fan operation.

Drawings

FIG. 1 is an exploded schematic view of the present invention;

fig. 2 is a cross-sectional view of the present invention;

FIG. 3 is an exploded view of the rotor assembly of the present invention;

FIG. 4 is a schematic view of a rotor assembly of the present invention with a portion broken away;

fig. 5 is a perspective view of a rotor assembly according to the present invention;

FIG. 6 is a schematic layout of the blades and the outer frame of the present invention;

fig. 7 is a front view of the rotor assembly of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. Furthermore, the technical features mentioned in the embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

As shown in fig. 1 to 7, a high efficiency low noise fan includes a frame assembly 1, a rotating assembly 2, and a stator assembly 3, wherein,

the frame assembly 1 comprises an outer frame 11, a sleeve 12 and a bearing 13, wherein the sleeve 12 is vertically arranged on the outer frame 11, and the bearing 13 is fixedly sleeved on the inner wall of the sleeve 12; the middle position of the frame component 1 is provided with a cylindrical sleeve 12, the sleeve 12 is coaxially matched with the middle hole of the outer frame 11 and is firmly bonded by adopting a high-temperature-resistant high-strength adhesive, preferably, the two bearings 13 are arranged up and down, a compression spring 15 is arranged between the two bearings, and the upper end and the lower end of the compression spring 15 are respectively abutted against one bearing 13. The upper end of the sleeve 12 is provided with a bearing 13 hole for installing the bearing 13 at the upper end, the round hole at the lower end of the sleeve 12 is sequentially provided with a compression spring 15 and the bearing 13 at the lower end, and the compression spring 15 can generate certain axial pretightening force to reduce the play of the bearing 13, so that the bearing 13 has lower noise when running at high speed; the inner holes of the two bearings 13 in the sleeve 12 are sequentially penetrated through the rotating shaft 22 from top to bottom, the lower end of the rotating shaft 22 is provided with a clamp spring 14 groove, the lower end of the rotating shaft 22 penetrates out of the inner hole of the bearing 13 at the lower end of the sleeve 12, the clamp spring 14 is pressed into the clamp spring 14 groove, the clamp spring 14 is located below the two bearings 13, and the risk that the inner hole of the bearing 13 falls off does not occur when the whole rotating assembly 2 operates normally.

The rotating assembly 2 comprises an impeller 21, a rotating shaft 22, a casing 23, magnetic rings 24 and a clamp spring 14, wherein the impeller 21 is fixedly sleeved on the casing 23, the rotating shaft 22 and the casing 23 are coaxially arranged, the upper end of the rotating shaft 22 is fixedly connected to the casing 23, the lower end of the rotating shaft 22 penetrates through the bearing 13, the connecting part of the rotating shaft 22 and the casing 23 is fixed by laser welding, the magnetic rings 24 are multiple and are respectively fixedly sleeved on the inner wall of the casing 23, and two adjacent magnetic rings 24 are mutually abutted; the magnetic ring 24 is divided into a plurality of small sections along the axial direction, the material of the magnetic ring 24 is bonded neodymium iron boron or hot-pressed neodymium iron boron magnetized in a radiation mode, annular eddy current heating generated inside the magnetic ring 24 in high-speed operation can be reduced, the risk of high-temperature demagnetization of the magnetic ring 24 is avoided, and the working reliability of the whole fan is improved.

The stator assembly 3 comprises a stator 31 and a winding 32, the stator 31 is fixedly sleeved on the outer wall of the sleeve 12, the winding 32 is fixedly installed on the stator 31, the whole stator assembly 3 is coaxially matched with the cylindrical sleeve 12, and the matching circular surfaces are firmly bonded by a high-temperature-resistant high-strength adhesive.

As shown in fig. 2, the impeller 21 has an odd number of blades 211, and the blades 211 are preferably 5, 7, and 9. The impeller 21 is formed by injection molding, and the casing 23 is made of soft magnetic material with good magnetic conductivity, such as ferrite stainless steel, pure iron, low carbon steel, silicon steel and the like, and is used for reducing the reluctance loss in the main magnetic circuit and improving the working efficiency. Impeller 21, casing 23 and magnetic ring 24 are the coaxial cooperation of disc, adopt high temperature resistant binder to glue firmly between the fitting surface, wherein impeller 21 upper end is provided with a plurality of cylinders, casing 23 upper end correspondence is provided with a plurality of through-holes, a plurality of cylinders that impeller 21 upper end set up pass a plurality of through-holes that casing 23 upper end set up, after passing, the part that each cylinder exposes casing 23 adopts hot melt riveting fixed to fix impeller 21 on casing 23, make impeller 21 not drop from the casing 23 outside when high-speed rotation. In addition, considering the stationarity of whole rotating assembly 2 when high-speed operation, rotating assembly 2 is provided with and is used for aggravating balanced structure, specifically speaking, impeller 21 up end is close to outside whole circle and evenly is provided with a plurality of recesses 111, the inboard of impeller 21 lower extreme is equipped with annular ladder mouth and casing 23 excircle facial features and forms annular balancing tank 25, annotate balanced mud through balanced technology in the position of recess 111 and annular balancing tank 25, can make rotating assembly 2 operate very steadily, has restrained the vibration of fan.

As shown in fig. 3, 4 and 5, when the impeller 21 is normally operated, the gas flow path f is: the air enters from the upper end of the space between the two blades 211 outside the impeller 21 and flows out from the lower end, namely, the upper end is an air inlet and the lower end is an air outlet.

Referring to fig. 6, the inner wall 112 of the outer frame 11 is a cylindrical surface, a certain gap g exists between the blade tip portion of the blade 211 and the inner wall 112 of the outer frame 11, the gap g has a non-uniform length at the wind inlet of the blade tip, the gap at the wind outlet gradually decreases, the gap g constantly extends to the wind outlet of the blade tip, and a fin-shaped protrusion 212 is disposed on the upper portion of the blade tip of at least one of the blades 211, so that the blade tip can reduce the generation of gas vortex, thereby reducing noise.

Referring to fig. 7, as can be seen from the circumferential cross-sectional shape of the blade 211, the cross section of the blade 211 is mainly defined by an upper swept curve 2111 and a lower swept curve 2112, and the thickness of the blade 211 forms a shape with a thick middle part and thin air inlet and outlet, which is beneficial to reducing wind resistance and improving ventilation efficiency when the blade 211 rotates.

It will be understood by those skilled in the art that the foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the invention to the particular forms disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

Claims

1. A high-efficiency low-noise fan is characterized by comprising a frame assembly, a rotating assembly and a stator assembly, wherein,

2. The fan as claimed in claim 1, wherein the rotating assembly further comprises a clamp spring, a clamp spring groove is formed at a lower end of the rotating shaft, the clamp spring is clamped in the clamp spring groove, and the clamp spring is located below the bearing.

3. A high efficiency and low noise fan according to claim 1, wherein said bearings are disposed in two up and down directions, and a compression spring is disposed between them, and upper and lower ends of said compression spring abut against one of said bearings, respectively.

4. A high efficiency, low noise fan according to claim 1 wherein the number of blades of said impeller is an odd number.

5. A high efficiency and low noise fan as claimed in claim 1, wherein the upper end of the casing is provided with a plurality of through holes, the upper end of the impeller is provided with posts at positions corresponding to the through holes on the casing, and the posts are fixed on the casing by hot melting riveting after passing through the corresponding through holes on the casing, so as to prevent the impeller from falling off the casing when rotating.

6. A high efficiency and low noise fan as claimed in claim 1, wherein the impeller has a plurality of grooves uniformly formed on the upper end surface thereof, and the grooves are filled with the balance mud, the lower end of the inner wall of the impeller has an annular stepped portion which forms an annular balance groove together with the outer circumferential surface of the casing, and the annular balance groove is filled with the balance mud.

7. A high efficiency and low noise fan as claimed in claim 1, wherein the inner wall of the outer frame is a cylindrical surface, the air flow enters from the upper end of the space between the two blades of the impeller and exits from the lower end thereof as the impeller rotates, and a gap exists between the tips of the blades and the inner wall of the outer frame, the gap gradually becomes smaller at the wind inlet of the tips, and then the gap is constantly extended to the wind outlet.

8. A high efficiency and low noise fan according to claim 7 wherein the upper portion of the tip of at least one of said blades is provided with a fin-like projection to reduce the generation of air vortex at the tip of said blade to reduce noise.

9. A high efficiency, low noise fan as claimed in claim 7, wherein said blades have a circumferential cross section defined by upper and lower sweep curves, so that said blades have a shape with a thick center and thin air inlets and outlets.

10. A high efficiency, low noise fan as claimed in claim 1, wherein said casing is made of soft magnetic material, and said magnetic ring is made of bonded neodymium iron boron or hot pressed neodymium iron boron magnetized by radiation.