CN217999905U

CN217999905U - Low-noise high-temperature-resistant fan

Info

Publication number: CN217999905U
Application number: CN202221830310.2U
Authority: CN
Inventors: 丁贇; 郭文光; 王亚; 肖金星
Original assignee: Shanghai Heyu Dynamo Co ltd
Current assignee: Shanghai Heyu Dynamo Co ltd
Priority date: 2022-07-15
Filing date: 2022-07-15
Publication date: 2022-12-09
Anticipated expiration: 2032-07-15

Abstract

The utility model belongs to the field of fans, and particularly discloses a low-noise high-temperature-resistant fan, which comprises a C-shaped fixed seat, a rotor, a rear end cover, a front end cover, a lower volute, an upper volute, a first wind wheel and a second wind wheel; the second wind wheel is arranged in a cavity enclosed by the upper volute and the lower volute, the first wind wheel is arranged outside the upper volute, the output end of the rotor is connected with a driving shaft, the driving shaft is rotatably installed in the rear end cover through a bearing, the tail end of the driving shaft penetrates through the centers of the first wind wheel, the lower volute and the second wind wheel to be fixedly installed, and a noise reduction assembly is detachably installed in the air channel. The utility model discloses an all install a set of wind wheel in the upper volute of fan casing inside and outside both sides, can utilize outside wind wheel to incite equipment internal gas, carry out air circulation better, be favorable to optimizing the fan wind channel, improve the wind speed; the silencing assembly is installed in the air duct, the inner silencing barrel and the silencing annular cavity on the outer silencing barrel are matched with each other, efficient noise reduction is achieved, and the silencing assembly is convenient to disassemble and assemble and convenient to maintain.

Description

Low-noise high-temperature-resistant fan

Technical Field

The utility model relates to a fan field specifically is a low noise high temperature resistance fan.

Background

The fan is a driven fluid machine which increases the pressure of gas and discharges the gas by means of input mechanical energy. The fan generally includes a fan housing, a motor and an impeller, the motor is disposed at the rear end of the fan housing, the impeller is disposed in the fan housing and connected to an output shaft of the motor, and during operation, the output shaft of the motor drives the impeller to rotate, thereby achieving the purpose of exhausting and delivering air.

At present fan when practical application, generally only a set of wind wheel structure of installation in the casing, it is better to the air suction effect in fan the place ahead, but the fan is when installing in equipment use, relatively poor to the inside air cycle nature of equipment, and when the wind channel carries out air escape, the noise is great, causes the interference to external environment.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a low noise high temperature resistance fan to solve the problem that proposes in the above-mentioned background art.

In order to achieve the above purpose, the utility model provides a following technical scheme: a low-noise high-temperature-resistant fan comprises a C-shaped fixed seat, a rotor, a rear end cover, a front end cover, a lower volute, an upper volute, a first wind wheel and a second wind wheel; the rotor is embedded in a notch reserved in the C-shaped fixed seat, the front side surface and the rear side surface of the C-shaped fixed seat are packaged with the front end cover and the rear end cover through screws, the I-shaped fixed seat is fixedly arranged in the C-shaped fixed seat, a framework is arranged on the I-shaped fixed seat, and an enameled wire is wound on the framework; the rear end cover is fixedly arranged on the outer side surface of the upper volute, the upper volute is fixedly connected with the lower volute, the second wind wheel is arranged in a cavity enclosed by the upper volute and the lower volute, the first wind wheel is arranged outside the upper volute, the output end of the rotor is connected with a driving shaft, the driving shaft is rotatably arranged in the rear end cover through a bearing, the tail end of the driving shaft passes through the centers of the first wind wheel, the lower volute and the second wind wheel and is fixedly arranged on the driving shaft; an air duct is arranged on the lower volute, and a silencing assembly is detachably mounted in the air duct.

Preferably, the first wind wheel is a plastic wind wheel, and the second wind wheel is a stainless steel wind wheel.

Preferably, the first wind wheel is provided with blades distributed in an annular array at the periphery, and the blades are in an L-shaped structure.

Preferably, the silencing assembly comprises a fixed cover, an inner silencing barrel and an outer silencing barrel; the fixed cover is sleeved on the outer port of the air duct, an air outlet is reserved in the center of the fixed cover, the outer silencing tube is fixed on the fixed cover, the inner silencing tube is communicated with the air outlet, and the inner silencing tube is fixed in the outer silencing tube.

Preferably, one end of the inner silencing tube close to the air outlet is closed, the other end of the inner silencing tube extends out of the outer silencing tube and expands outwards to form an air inlet attached to the inner wall of the air duct, the inner silencing tube is hollow, and a plurality of first silencing annular cavities with expanded inner diameters are arranged on the inner wall of the inner silencing tube at equal intervals along the length direction of the inner silencing tube.

Preferably, one end of the outer silencing tube, which is far away from the air outlet, is closed, interlayer cavities are formed between the outer silencing tube and the inner silencing tube at intervals, a plurality of flow guide holes communicated with the interlayer cavities are formed in each first silencing annular cavity, and a plurality of second silencing annular cavities with enlarged inner diameters are arranged on the side wall of the outer silencing tube at equal intervals along the length direction of the outer silencing tube.

Preferably, the fixed cover and the outer port of the air duct are correspondingly provided with mounting holes distributed in an annular array, and the fixed cover is fixedly arranged on the air duct through fastening bolts.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses an all install a set of wind wheel in the upper volute of fan casing inside and outside both sides, can utilize outside wind wheel to incite equipment internal gas, carry out air circulation better, be favorable to optimizing the fan wind channel, improve the wind speed; the silencing assembly is arranged in the air duct, the inner silencing barrel and the silencing annular cavity on the outer silencing barrel are matched with each other, high-efficiency noise reduction is achieved, and the silencing assembly is convenient to disassemble and assemble and convenient to maintain.

Drawings

Fig. 1 is a schematic view of the split structure of the present invention;

fig. 2 is a schematic structural diagram of a first wind wheel of the present invention;

fig. 3 is a schematic view of the whole structure of the silencing assembly of the present invention;

fig. 4 is a schematic view of the internal structure of the silencing assembly of the present invention;

fig. 5 is a specific structural schematic diagram of a second wind wheel of the present invention;

fig. 6 is a schematic view of the overall assembly structure of the present invention.

In the figure: 1. a C-shaped fixed seat; 2. a rotor; 3. a rear end cap; 4. a front end cover; 5. a screw; 6. an I-shaped fixed seat; 7. a framework; 8. a drive shaft; 9. a lower volute; 10. an upper volute; 11. a first wind wheel; 12. a second wind wheel; 13. an air duct; 14. a blade; 15. a fixed cover; 16. an air outlet; 17. an internal silencing barrel; 18. a first sound-deadening ring chamber; 19. an outer sound-deadening barrel; 20. a second sound-deadening ring chamber; 21. a flow guide hole; 22. an air inlet; 23. mounting holes; 24. and fastening the bolt.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

Referring to fig. 1-6, the present invention provides a technical solution: a low-noise high-temperature-resistant fan comprises a C-shaped fixed seat 1, a rotor 2, a rear end cover 3, a front end cover 4, a lower volute 9, an upper volute 10, a first wind wheel 11 and a second wind wheel 12; the rotor 2 is embedded in a notch reserved in the C-shaped fixed seat 1, the front side face and the rear side face of the C-shaped fixed seat 1 are packaged with the front end cover 4 and the rear end cover 3 through screws 5, the I-shaped fixed seat 6 is fixedly arranged in the C-shaped fixed seat 1, the framework 7 is arranged on the I-shaped fixed seat 6, and an enameled wire is wound on the framework 7; the rear end cover 3 is fixedly arranged on the outer side surface of the upper volute 10, the upper volute 10 is fixedly connected with the lower volute 9, the second wind wheel 12 is arranged in a cavity formed by the upper volute 10 and the lower volute 9 in an enclosed mode, the first wind wheel 11 is arranged outside the upper volute 10, the output end of the rotor 2 is connected with the driving shaft 8, the driving shaft 8 is rotatably arranged in the rear end cover 3 through a bearing, the tail end of the driving shaft 8 penetrates through the centers of the first wind wheel 11, the lower volute 9 and the second wind wheel 12 to be fixedly arranged, and the first wind wheel 11 is fixedly arranged on the driving shaft 8; an air duct 13 is arranged on the lower volute 9, and a silencing assembly is detachably mounted in the air duct 13.

Further, the first wind wheel 11 is a plastic wind wheel, and the second wind wheel 12 is a stainless steel wind wheel.

Further, the first wind wheel 11 has blades 14 distributed in an annular array on the periphery, and the blades 14 are in an "L" shaped structure.

Further, the silencing assembly comprises a fixed cover 15, an inner silencing barrel 17 and an outer silencing barrel 19; the fixed cover 15 is sleeved on the outer port of the air duct 13, an air outlet 16 is reserved in the center of the fixed cover 15, the outer silencing tube 19 is fixed on the fixed cover 15, the inner cavity of the outer silencing tube is communicated with the air outlet 16, and the inner silencing tube 17 is fixed in the outer silencing tube 19.

Furthermore, one end of the inner silencing tube 17 close to the air outlet 16 is closed, and the other end of the inner silencing tube extends out of the outer silencing tube 19 and expands outwards to form an air inlet 22 attached to the inner wall of the air duct 13, the inner silencing tube 17 is hollow, and a plurality of first silencing annular cavities 18 with expanded inner diameters are arranged on the inner wall of the inner silencing tube at equal intervals along the length direction of the inner silencing tube.

Furthermore, one end of the outer silencing tube 19, which is far away from the air outlet 16, is closed, a sandwich cavity is formed between the outer silencing tube 19 and the inner silencing tube 17 at intervals, a plurality of flow guide holes 21 communicated with the sandwich cavity are formed in each first silencing annular cavity 18, and a plurality of second silencing annular cavities 20 with enlarged inner diameters are arranged on the side wall of the outer silencing tube 19 at equal intervals along the length direction of the outer silencing tube.

Furthermore, the fixing cover 15 and the outer port of the air duct 13 are correspondingly provided with mounting holes 23 distributed in an annular array, and the fixing cover 15 is fixedly mounted on the air duct 13 through fastening bolts 24.

The working principle is as follows:

when the fan operates, the rotor 2 rotates to drive the driving shaft 8 to rotate, the first wind wheel 11 and the second wind wheel 12 which are fixedly arranged on the driving shaft 8 can be synchronously driven to synchronously rotate, the first wind wheel 11 and the second wind wheel 12 are respectively arranged at the inner side and the outer side of the volute and are mutually matched, the internal gas of the equipment can be excited by utilizing the external first wind wheel 11, the air circulation is better carried out, the optimization of the fan air duct 13 is facilitated, and the wind speed is improved.

A silencing component is arranged in the air duct 13, when air is discharged outwards from the air duct 13, the air firstly enters the inner silencing barrel 17 from the air inlet 22 of the silencing component, a plurality of first silencing annular cavities 18 with enlarged inner diameters are arranged in the inner silencing barrel 17 at equal intervals to form silencing areas with changed cross sections, so that noise is attenuated or reflected; the air current enters the outer silencing tube 19 through the flow guide holes 21 on the first silencing annular cavity 18, a plurality of second silencing annular cavities 20 with enlarged inner diameters are arranged on the side wall of the outer silencing tube 19 at equal intervals along the length direction of the outer silencing tube to form a plurality of silencing areas with changed sections, the noise is attenuated or reflected again, the efficient noise reduction is realized, and finally the air current is discharged from the air outlet 16.

The silencing component is detachably mounted at the outer port of the air duct 13 through the fixing cover 15, and the inner silencing barrel 17 and the outer silencing barrel 19 are arranged in the air duct 13 and connected through the fastening bolt 24, so that the silencing component is convenient to assemble, disassemble and maintain.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A low-noise high-temperature-resistant fan is characterized by comprising a C-shaped fixed seat (1), a rotor (2), a rear end cover (3), a front end cover (4), a lower volute (9), an upper volute (10), a first wind wheel (11) and a second wind wheel (12); the rotor (2) is embedded in a notch reserved in the C-shaped fixing seat (1), the front side surface and the rear side surface of the C-shaped fixing seat (1) are used for packaging the front end cover (4) and the rear end cover (3) through screws (5), an I-shaped fixing seat (6) is fixedly installed in the C-shaped fixing seat (1), a framework (7) is installed on the I-shaped fixing seat (6), and an enameled wire is wound on the framework (7); the rear end cover (3) is fixedly arranged on the outer side surface of the upper volute (10), the upper volute (10) is fixedly connected with the lower volute (9), the second wind wheel (12) is arranged in a cavity formed by the upper volute (10) and the lower volute (9) in an enclosed mode, the first wind wheel (11) is arranged outside the upper volute (10), the output end of the rotor (2) is connected with the driving shaft (8), the driving shaft (8) is rotatably arranged in the rear end cover (3) through a bearing, the tail end of the driving shaft (8) penetrates through the first wind wheel (11), the lower volute (9) and the center of the second wind wheel (12) to be fixedly arranged, and the first wind wheel (11) is fixedly arranged on the driving shaft (8); an air duct (13) is arranged on the lower volute (9), and a silencing assembly is detachably mounted in the air duct (13).

2. The low-noise high-temperature-resistant fan according to claim 1, wherein: the first wind wheel (11) is a plastic wind wheel, and the second wind wheel (12) is a stainless steel wind wheel.

3. The fan of claim 1, wherein: the periphery of the first wind wheel (11) is provided with blades (14) distributed in an annular array, and the blades (14) are in an L-shaped structure.

4. The low-noise high-temperature-resistant fan according to claim 1, wherein: the silencing component comprises a fixed cover (15), an inner silencing barrel (17) and an outer silencing barrel (19); the fixed cover (15) is sleeved on an outer port of the air duct (13), an air outlet (16) is reserved in the center of the fixed cover (15), the outer silencing tube (19) is fixed on the fixed cover (15), an inner cavity is communicated with the air outlet (16), and the inner silencing tube (17) is fixed in the outer silencing tube (19).

5. The fan of claim 4, wherein: one end of the inner silencing tube (17) close to the air outlet (16) is closed, the other end of the inner silencing tube extends out of the outer silencing tube (19) and expands outwards to form an air inlet (22) attached to the inner wall of the air duct (13), the inner silencing tube (17) is hollow, and a plurality of first silencing annular cavities (18) with expanded inner diameters are arranged on the inner wall of the inner silencing tube at equal intervals along the length direction of the inner silencing tube.

6. The fan of claim 4, wherein: one end, far away from the air outlet (16), of the outer silencing barrel (19) is closed, interlayer cavities are formed between the outer silencing barrel (19) and the inner silencing barrel (17) at intervals, a plurality of flow guide holes (21) communicated with the interlayer cavities are formed in each first silencing annular cavity (18), and a plurality of second silencing annular cavities (20) with expanded inner diameters are formed in the side wall of the outer silencing barrel (19) at equal intervals along the length direction of the outer silencing barrel.

7. The fan of claim 4, wherein: the fixed cover (15) and the outer port of the air duct (13) are correspondingly provided with mounting holes (23) distributed in an annular array, and the fixed cover (15) is fixedly arranged on the air duct (13) through fastening bolts (24).