CN217129922U

CN217129922U - Centrifugal fan with heat dissipation function

Info

Publication number: CN217129922U
Application number: CN202220452511.7U
Authority: CN
Inventors: 周玉岭; 窦志鹏
Original assignee: Jinan Hongshengyuan Fan Equipment Co ltd
Current assignee: Jinan Hongshengyuan Fan Equipment Co ltd
Priority date: 2022-03-02
Filing date: 2022-03-02
Publication date: 2022-08-05
Anticipated expiration: 2032-03-02

Abstract

The application is a centrifugal fan with heat dissipation function, which belongs to the utilization of centrifugal fans and comprises a base; the volute is arranged on the base; the rotor rotating shaft penetrates through the volute and is connected with a motor, the motor is arranged on the base, the rotor rotating shaft penetrates through the volute through the bearing in a rotating mode, an annular groove is formed in the position, corresponding to the bearing, of the rotor rotating shaft along the circumferential direction of the rotor rotating shaft, and the width of the annular groove is smaller than that of the bearing; the fan blades are arranged on the part of the rotor rotating shaft, which correspondingly penetrates out of the volute, the air outlet direction of the fan blades is the axial direction along the rotor rotating shaft, and the fan blades blow air to one side where the bearing is located; wind generated by rotation of the fan blades blows to a gap between the bearing and the rotor rotating shaft and then to the annular groove, so that heat at the bearing is taken away, the purpose of heat dissipation at the bearing is achieved, heat dissipation pertinence is strong, a heat dissipation effect can be achieved inside the bearing, and the heat dissipation effect is good.

Description

Centrifugal fan with heat dissipation function

Technical Field

The utility model relates to a centrifugal fan technical field especially relates to a centrifugal fan with heat dissipation function.

Background

The centrifugal fan is a driven fluid machine, the pressure of gas is increased by means of input mechanical energy, and the gas is accelerated by means of an impeller rotating at a high speed and is converted into potential energy. When current centrifugal fan carried high-temperature gas, high-temperature gas's in the organism heat can distribute to the complete machine of fan everywhere and cause the motor on the fan and around the temperature rise, especially the bearing department of rotor shaft, its not only temperature rise when carrying high-temperature gas, also can appear high temperature phenomenon under long-time work simultaneously, shorten the life-span of bearing. Some manufacturers generally set a cooling casing around the whole fan to reduce the temperature of the fan, and circulate cold water on the casing to reduce the temperature of the fan by using a water cooling method, which is easy to cause the rusting phenomenon of components on the centrifugal fan, especially for bearings, the water cooling method is not suitable for cooling the bearings. The traditional heat dissipation mode is the air cooling mode, however, for the heat dissipation of the bearing, the air cooling only stays on the surface of the bearing for heat dissipation, and the heat dissipation effect on the inside cannot be well achieved.

SUMMERY OF THE UTILITY MODEL

Current centrifugal fan is when long-time operation or transport high-temperature gas, its complete machine temperature rise everywhere, especially bearing department temperature in case risees, can shorten the life-span of bearing, and the cooling of current water-cooling mode not suitable bearing department, and air-cooled mode is only at bearing surface heat dissipation, can not play fine radiating effect to the inside of bearing, and this application designs a centrifugal fan with heat dissipation function, and the technical scheme of its concrete adoption is:

a centrifugal fan with a heat dissipation function includes:

a base;

the volute is arranged on the base;

the rotor rotating shaft penetrates through the volute and is connected with a motor, the motor is arranged on the base, the rotor rotating shaft penetrates through the volute through the bearing in a rotating mode, an annular groove is formed in the position, corresponding to the bearing, of the rotor rotating shaft along the circumferential direction of the rotor rotating shaft, and the width of the annular groove is smaller than that of the bearing;

the fan blades are arranged on the rotor rotating shaft and correspondingly penetrate out of the portion of the volute, the air outlet direction of the fan blades is the axial direction along the rotor rotating shaft, and the fan blades blow air to one side where the bearing is located.

Preferably, the rotor rotating shaft is further provided with an air duct, one end of the air duct is communicated with the outside, and the other end of the air duct is communicated with the annular groove.

Preferably, a heat insulation sleeve is arranged between the bearing and the rotor rotating shaft.

Preferably, the inner wall of the heat insulation sleeve is provided with a plurality of heat dissipation grooves along the circumferential direction of the heat insulation sleeve, and the plurality of heat dissipation grooves are arranged along the axial direction of the heat insulation sleeve at intervals.

Preferably, the heat insulation sleeve is provided with a plurality of first heat dissipation holes along the radial direction corresponding to the heat dissipation grooves, the plurality of first heat dissipation holes are arranged along the circumferential direction of the heat dissipation grooves at intervals, the inner ring of the bearing is fully distributed with a plurality of second heat dissipation holes, and the plurality of second heat dissipation holes and the plurality of first heat dissipation holes are correspondingly aligned.

Preferably, the aperture of the second heat dissipation hole is smaller than that of the first heat dissipation hole.

Preferably, the volute is provided with an annular wind gathering plate corresponding to the outer wall of the side surface through which the rotor rotating shaft penetrates, and the rotor rotating shaft is superposed with the central axis of the annular wind gathering plate.

Preferably, the diameter of the small end of the annular wind gathering plate is equal to the outer diameter of the bearing.

In one embodiment, the fan blades are disposed on the rotor shaft through a mounting plate, the mounting plate including:

first arc chuck and second arc chuck, a plurality of flabellums set up in the cambered surface of first arc chuck and the cambered surface of second arc chuck at an interval respectively, and the one end of first arc chuck is articulated with the one end of second arc chuck, and the other end of first arc chuck and the other end of second arc chuck have the connecting hole respectively, and first arc chuck and second arc chuck insert the connecting hole through the connecting piece and are connected it.

the annular disc is provided with a plurality of threaded holes along the radial direction, and the plurality of threaded holes are arranged at intervals along the circumferential direction;

the screw rod, each screw hole of screw rod screw in, the bottom of screw rod is rotated and is connected with the arc chuck, and a plurality of chucks are circular arranging.

The utility model discloses a position that corresponds the bearing at the rotor pivot sets up the ring channel, sets up the flabellum in the rotor pivot simultaneously, and when the rotor pivot rotated, the wind that the flabellum rotation produced blown to the clearance between bearing and the rotor pivot and then to the ring channel in, and then took away the heat of bearing department, played the radiating purpose to bearing department; in addition, the fan blades are directly arranged on the rotor rotating shaft, when the rotor works, the fan blades start blowing aiming at the bearing, so that heat dissipation is realized, the heat dissipation pertinence is strong, the heat dissipation effect on the inside of the bearing can be realized, and the heat dissipation effect is good.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 is a schematic view of a fan blade connected to a rotor shaft in one of the connection modes;

FIG. 3 is a schematic view of another connection of fan blades on a rotor shaft;

fig. 4 is an enlarged view at I in fig. 1.

In the figure, 1, a base, 2, a volute, 3, a rotor rotating shaft, 4, a rotor, 5, fan blades, 6, a motor, 7, a mounting disc, 701, a first arc-shaped chuck, 702, a second arc-shaped chuck, 703, a connecting piece, 704, an annular disc, 705, a screw rod, 706, a threaded hole, 707, an arc-shaped chuck, 8, an annular air collecting plate, 9, an air duct, 10, an annular groove, 11, a heat dissipation groove, 12, a heat insulation sleeve, 13, a bearing, 14, a second heat dissipation hole, 15 and a first heat dissipation hole.

Detailed Description

In order to clearly illustrate the technical features of the present invention, the present invention is explained in detail by the following embodiments with reference to the accompanying drawings.

In addition, in the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate orientations and positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

As shown in fig. 1 and 4, a centrifugal fan with a heat dissipation function includes a base 1, a volute 2, a rotor shaft 3, and a plurality of fan blades 5. The base 1 is used for providing installation positions for the other components, the volute 2 is fixed on the base 1 through bolts, a rotor 4 is arranged in the volute 2, the rotor 4 is arranged in the volute 2 through a rotor rotating shaft 3, the rotor rotating shaft 3 penetrates through the volute 2 and is connected with a motor 6, the motor 6 drives the rotor rotating shaft 3 to further drive the rotor 4 to rotate in the volute 2, gas is pressurized, the rotor rotating shaft 3 is rotatably connected with the volute 2 through a bearing 13, an annular groove 10 is circumferentially arranged on the circumferential wall of the rotor rotating shaft 3 corresponding to the position of the bearing 13, the width of the annular groove 10 is smaller than that of the bearing 13, so that the inner ring of the bearing 13 can be contacted with the outer side wall of the rotor rotating shaft 3, the rotor rotating shaft 3 has a bearing position, the reliability degree of connection of the bearing 13 is improved, and the annular groove 10 is also used for increasing the gap between the bearing 13 and the side surface of the rotor rotating shaft 3, when guaranteeing to connect, improve the entering volume of wind here, improve the radiating effect.

However, blowing air between the gap between the bearing 13 and the rotor shaft 3 is realized by the plurality of fan blades 5 arranged on the rotor shaft 3, the plurality of fan blades 5 are arranged at the portion of the rotor shaft 3 corresponding to the portion passing through the volute 2, and meanwhile, the plurality of fan blades 5 are arranged along the circumferential direction of the rotor shaft 3 at uniform intervals, the air outlet direction of the fan blades 5 is the axial direction along the rotor shaft 3, when the rotor shaft 3 rotates, the fan blades 5 thereon are driven to rotate, and then the air is blown to the side where the bearing 13 is located, the air blown out by the fan blades 5 passes through the gap between the bearing 13 and the rotor shaft 3 and enters the annular groove 10, and the heat dissipation effect on the inside of the bearing 13 is improved.

Furthermore, in order to increase the air volume entering between the rotor rotating shaft 3 and the bearing 13 and improve the heat dissipation effect, an air duct 9 is further arranged on the rotor rotating shaft 3, one end of the air duct 9 is communicated with the outside, the other end of the air duct is communicated with the annular groove 10, air blown out by the rotation of the fan blades 5 enters the air duct 9 and enters the annular groove 10 through the air duct 9, and then the air flows through the space between the bearing 13 and the rotor rotating shaft 3 to carry partial heat, so that the heat dissipation is realized; in addition, the presence of the annular groove 10 also reduces the direct contact area between the rotor shaft 3 and the bearing 13, and also reduces the friction surface to some extent, and thus the heat generated.

Further, the heat insulating sleeve 12 is provided between the bearing 13 and the rotor shaft 3, the heat insulating sleeve 12 is made of a metal material, the heat insulating sleeve 12 can reduce the heat generated between the rotor shaft 3 and the bearing 13 from being transmitted to the bearing 13, and the heat dissipation of the bearing 13 is performed from both the external cooling and the temperature transmission, thereby further reducing the temperature of the bearing 13.

Furthermore, in order to increase the air intake between the inner walls of the rotor rotating shaft 3 and the heat insulating sleeve 12, the heat radiating grooves 11 are formed in the heat insulating sleeve 12 along the circumferential direction of the heat insulating sleeve 12, the heat radiating grooves 11 are arranged in a plurality, the heat radiating grooves 11 are arranged along the axial direction of the heat insulating sleeve 12 at intervals, the heat radiating grooves 11 are arranged in order to increase the air intake space between the heat insulating sleeve 12 and the rotor rotating shaft 3, so that air blown in by the fan blades 5 enters the heat radiating grooves 11 through the air duct 9 and the gap between the heat insulating sleeve 12 and the rotor rotating shaft 3, the air intake amount is increased, and the heat radiating effect is improved.

Further, the position that the heat insulating sleeve 12 corresponds radiating groove 11 is equipped with first louvre 15 along radial, this louvre runs through the inside and outside wall of heat insulating sleeve 12, first louvre 15 sets up a plurality ofly, a plurality of first louvres 15 set up along radiating groove 11's circumference interval, bearing 13's inner circle is covered with a plurality of second louvres 14, a plurality of first louvres 15 and a plurality of second louvres 14 correspond to adjust well the setting, the wind that gets into in the radiating groove 11 like this blows to 2 insides of spiral case through a plurality of first louvres 15 and a plurality of second louvres 14, so can satisfy the basis of using at bearing 13 on, can also dispel the heat to bearing 13 inside, the temperature of bearing 13 has been reduced.

Further, the diameter of the second heat dissipation hole 14 is smaller than that of the first heat dissipation hole 15, so as to avoid the reduction of the strength of the bearing 13 caused by the larger diameter of the second heat dissipation hole 14.

Further, in order to improve the utilization ratio of the wind blowing out to flabellum 5, the outer wall of the side of wearing out corresponding rotor shaft 3 at volute 2 is equipped with annular wind gathering plate 8, this annular wind gathering plate 8 is tubaeform shape, the osculum is located volute 2, the macrostoma is close to flabellum 5 and sets up, rotor shaft 3 and annular wind gathering plate 8's axis coincidence, annular wind gathering plate 8 can gather together the wind blowing out to flabellum 5 at annular wind and form the direction of the generating line along annular wind gathering plate 8, improve the wind speed, be favorable to blowing in to wind channel 9, reduce the other direction diffusion of wind direction.

Further, the diameter of the small end of the annular wind gathering plate 8 is equal to the outer diameter of the bearing 13, so that wind along the bus direction of the annular wind gathering plate 8 directly blows to the bearing 13 except entering the wind channel 9, and directly radiates the outside of the bearing 13, so that heat is radiated from the inside and the outside of the bearing 13, and the radiating effect is improved.

In one embodiment, as shown in fig. 2, the fan blades 5 are disposed on the rotor shaft 3 through a mounting disk 7, wherein the structure of the mounting disk 7 specifically includes a first arc-shaped chuck 701 and a second arc-shaped chuck 702, the fan blades 5 are welded to the arc surface of the first arc-shaped chuck 701 and the arc surface of the second arc-shaped chuck 702 at intervals, so that the whole body is disposed at even intervals in the circumferential direction, one end of the first arc-shaped chuck 701 is hinged to one end of the second arc-shaped chuck 702, the other end of the first arc-shaped chuck 701 and the other end of the second arc-shaped chuck 702 have a connecting hole, and the first arc-shaped chuck 701 and the second arc-shaped chuck 702 are connected by inserting the connecting piece 703 into the connecting hole. Above-mentioned connecting piece 703 is the bolt and nut structure in this embodiment, and the bolt penetrates connecting hole and threaded connection nut, through the length of the constantly increaseing screw in bolt of nut to with first arc cardboard and second arc cardboard chucking on rotor shaft 3, realize the fixed of mounting disc 7.

In an embodiment, as shown in fig. 3, the structure of the mounting disk 7 may further include an annular disk 704, an annular chuck, and three screws 705, where the annular disk 704 has three threaded holes 706 along a radial direction thereof, the threaded holes 706 are three in this embodiment, the three threaded holes 706 are circumferentially spaced, similarly, the three screws 705 are three, the three screws 705 are correspondingly screwed into the three threaded holes 706, an arc chuck 707 is rotatably connected to a bottom end of each screw 705 through a bearing 13, the three arc chucks 707 are arranged in a circle, and a center of the circle is located on a central axis of the rotor rotating shaft 3. However, when the annular disc 704 needs to be fixed on the rotor rotating shaft 3, the three screws 705 are rotated, and the depth of the screws 705 rotating into the annular disc 704 is increased, so that the annular chuck continuously abuts against the rotor rotating shaft 3, and the three arc chucks 707 are tightly clamped on the rotor rotating shaft 3, thereby fixing the mounting disc 7.

The above-mentioned specific embodiments can not be regarded as the restriction to the scope of protection of the utility model, to technical personnel in this technical field, it is right the utility model discloses any replacement improvement or transform that embodiment made all fall within the scope of protection of the utility model.

The parts of the present invention not described in detail are the known techniques of those skilled in the art.

Claims

1. The utility model provides a centrifugal fan with heat dissipation function which characterized in that includes:

a base;

a volute disposed on the base;

the rotor rotating shaft penetrates through the volute and is connected with a motor, the motor is arranged on the base, the rotor rotating shaft penetrates through the volute through a bearing in a rotating mode, an annular groove is formed in the position, corresponding to the bearing, of the rotor rotating shaft along the circumferential direction of the rotor rotating shaft, and the width of the annular groove is smaller than that of the bearing;

the fan blades are arranged on the rotor rotating shaft and correspondingly penetrate out of the portion of the volute, the air outlet direction of the fan blades is along the axial direction of the rotor rotating shaft, and the fan blades blow air to one side where the bearing is located.

2. The centrifugal fan with the heat dissipation function as recited in claim 1, wherein an air duct is further disposed on the rotor shaft, one end of the air duct is communicated with the outside, and the other end of the air duct is communicated with the annular groove.

3. The centrifugal fan with the heat dissipation function as recited in claim 1 or 2, wherein a heat insulating sleeve is provided between the bearing and the rotor shaft.

4. The centrifugal fan with the heat dissipation function as recited in claim 3, wherein the inner wall of the heat insulation sleeve is provided with a plurality of heat dissipation grooves along the circumferential direction thereof, and the plurality of heat dissipation grooves are arranged at intervals along the axial direction of the heat insulation sleeve.

5. The centrifugal fan according to claim 4, wherein the heat insulating sleeve has a plurality of first heat dissipating holes radially formed at positions corresponding to the heat dissipating grooves, the plurality of first heat dissipating holes are circumferentially spaced along the heat dissipating grooves, the inner ring of the bearing is covered with a plurality of second heat dissipating holes, and the plurality of second heat dissipating holes are aligned with the plurality of first heat dissipating holes.

6. The centrifugal fan with heat dissipation function as claimed in claim 5, wherein the second heat dissipation hole has a smaller diameter than the first heat dissipation hole.

7. The centrifugal fan with the heat dissipation function according to claim 4, 5 or 6, wherein an annular wind collecting plate is arranged on an outer wall of a side surface of the volute, which corresponds to the rotor rotating shaft, and the rotor rotating shaft is overlapped with a central axis of the annular wind collecting plate.

8. The centrifugal fan with the heat dissipation function as recited in claim 7, wherein a diameter of the small end of the annular wind gathering plate is equal to an outer diameter of the bearing.

9. The centrifugal fan with heat dissipation function as claimed in claim 1, wherein the fan blades are disposed on the rotor shaft through a mounting plate, and the mounting plate includes:

first arc chuck and second arc chuck, a plurality of flabellums respectively the interval set up in the cambered surface of first arc chuck and the cambered surface of second arc chuck, the one end of first arc chuck with the one end of second arc chuck is articulated, the other end of first arc chuck with the other end of second arc chuck has the connecting hole respectively, first arc chuck with second arc chuck passes through the connecting piece and inserts the connecting hole is connected it.

10. The centrifugal fan with heat dissipation function as claimed in claim 1, wherein the fan blades are disposed on the rotor shaft through a mounting plate, and the mounting plate includes:

the screw rod, the screw thread screw in each the screw hole, the bottom of screw rod is rotated and is connected with the arc chuck, and is a plurality of the chuck is circular arranging.