CN211082336U

CN211082336U - Horizontal centrifugal fan for high-temperature internal circulation

Info

Publication number: CN211082336U
Application number: CN201921809907.7U
Authority: CN
Inventors: 廖伟东; 王川申; 韩德刚; 张红明; 高新刚; 潘海; 申刚; 李红强
Original assignee: China Triumph International Engineering Co Ltd
Current assignee: China Triumph International Engineering Co Ltd
Priority date: 2019-10-25
Filing date: 2019-10-25
Publication date: 2020-07-24
Anticipated expiration: 2029-10-25

Abstract

The utility model provides a horizontal centrifugal fan for high temperature inner loop, including the frame, install motor in the frame, rack-mounted impeller shaft, install at the fan wheel of impeller shaft one end and be located the outside spiral case of fan wheel, the output shaft of motor is connected with the other end of impeller shaft, the frame is located the outside of furnace body casing, spiral case and fan wheel are located the inside of furnace body casing, be equipped with the furnace body through-hole on the furnace body casing, the impeller shaft is worn to establish in the furnace body through-hole, just the diameter of furnace body through-hole is greater than or equal to fan wheel's diameter. When the maintenance is needed, the fan impeller can be moved out of the furnace body shell through the furnace body through hole only by operating outside the furnace body shell and moving away the frame, the fan impeller, the impeller shaft and the motor are integrally moved out of the furnace body shell along with the frame, and the fan is convenient to maintain outside the furnace body shell, so that the maintenance work of the horizontal centrifugal fan is facilitated.

Description

Horizontal centrifugal fan for high-temperature internal circulation

Technical Field

The utility model relates to a thermotechnical equipment technical field especially relates to a horizontal centrifugal fan for high temperature inner loop.

Background

In the high temperature industrial furnace industry, high temperature internal circulation fans are often used to accelerate the rate of heating within the furnace. Under some specific working conditions, in order to heat the workpiece uniformly and efficiently, the workpiece needs to be heated by certain high air pressure, so that the common high-temperature internal circulation fan is difficult to meet the requirements of the working conditions. In order to meet the requirement of high wind pressure, the high-temperature fan needs to be made into a volute centrifugal type, and the wind pressure can be ensured. The centrifugal fan with the inserted volute is relatively difficult to disassemble and assemble, particularly has small space in a furnace body, and brings inconvenience to professionals when the fan has problems and needs to be overhauled or maintained. And because the high-temperature fan can only be horizontally installed on the side face of the furnace body under certain specific working conditions, and the installation space outside the furnace body is limited, the overall structure size of the high-temperature fan is not too large, and the requirement of horizontal installation on the fan impeller shaft is higher. If the existing traditional motor shaft is directly connected with the impeller, the overall size of the motor shaft and the motor is large. The heat conduction under the high temperature condition can also bring great high temperature problems to the bearing and the fan motor, especially under the working condition that the temperature in the furnace body exceeds 700 ℃.

SUMMERY OF THE UTILITY MODEL

In view of the above shortcomings in the prior art, the to-be-solved technical problem of the present invention is to provide a horizontal centrifugal fan for high temperature internal circulation, which is convenient for maintenance.

In order to realize the above-mentioned purpose, the utility model provides a horizontal centrifugal fan for high temperature inner loop, including the frame, install motor in the frame, install impeller shaft in the frame, install the fan wheel of impeller shaft one end and be located the outside spiral case of fan wheel, the output shaft of motor is connected with the other end of impeller shaft, the frame is located the outside of furnace body casing, spiral case and fan wheel are located the inside of furnace body casing, be equipped with the furnace body through-hole on the furnace body casing, the impeller shaft is worn to establish in the furnace body through-hole, just the diameter of furnace body through-hole is greater than or equal to fan wheel's diameter.

Further, the impeller shaft is mounted on the frame through a bearing.

Further, an output shaft of the motor is connected with the impeller shaft through a coupling.

Further, the frame includes bottom plate, two curb plates and mounting flange with the both sides limit rigid coupling of bottom plate respectively, the tip of two curb plates and the tip of bottom plate all with the mounting flange rigid coupling, motor and impeller shaft are arranged in the mounting groove that forms between two curb plates and the bottom plate, the outer wall rigid coupling of mounting flange and furnace body casing, just be equipped with the flange through-hole on the mounting flange, the impeller shaft is worn to establish in the flange through-hole.

Furthermore, a housing is installed on the machine frame, a protection cavity is defined by the housing, the two side plates and the bottom plate, and the impeller shaft is located in the protection cavity.

Furthermore, lifting lugs are welded on the side plates.

Furthermore, the volute is fixedly connected with the inner wall of the furnace body shell.

Furthermore, a heat insulation layer is arranged in the through hole of the furnace body, and the heat insulation layer is fixed on the rack.

Further, a heat dissipation impeller is mounted on the impeller shaft.

Further, install compressed air pipe on the frame, compressed air pipe is linked together with compressed air source.

As mentioned above, the utility model relates to a horizontal centrifugal fan for high temperature inner loop has following beneficial effect:

when the furnace body is normally used, the motor drives the fan impeller positioned in the furnace body shell to rotate through the impeller shaft, and the volute is arranged outside the fan impeller, so that the normal use requirement of high-temperature internal circulation in the furnace body is met; when needs overhaul, because the utility model discloses well motor, the impeller shaft, fan wheel all installs in the frame, and the frame is located furnace body shell's outside, the impeller shaft is worn to establish in the furnace body through-hole, and the diameter of furnace body through-hole is more than or equal to fan wheel's diameter, only need the outside operation at furnace body shell, and put aside the frame, just can shift out fan wheel from furnace body shell through the furnace body through-hole, and realize fan wheel, the impeller shaft, and the motor wholly shifts out furnace body shell along with the frame, and then be convenient for maintain the essential element of this fan in furnace body shell's outside, such as motor, the impeller shaft, and fan wheel etc. have made things convenient for this horizontal centrifugal fan's maintenance work.

Drawings

Fig. 1 is a usage state diagram of the horizontal centrifugal fan for high temperature internal circulation in the utility model.

Fig. 2 is a schematic structural diagram of a horizontal centrifugal fan for high-temperature internal circulation in the present invention.

Fig. 3 is a schematic structural diagram of the middle frame of the present invention.

Description of the element reference numerals

1 frame 4 blower fan impeller

11 bottom plate 5 volute

12 side plate 6 furnace body shell

13 mounting flange 61 furnace body through hole

131 flange through hole 7 bearing

14-mounting groove 8 coupling

15 cover 91 heat preservation layer

16 lifting lug 92 heat radiation impeller

2 motor 93 compressed air pipe

3 impeller shaft

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the structures, ratios, sizes, etc. shown in the drawings of the present application are only used for matching with the contents disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any modification of the structures, change of the ratio relationship or adjustment of the sizes should still fall within the scope covered by the technical contents disclosed in the present invention without affecting the function and the achievable purpose of the present invention. Meanwhile, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are only for convenience of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the modifications can be changed or adjusted without substantial technical changes and modifications.

As shown in fig. 1 to 3, the utility model provides a horizontal centrifugal fan for high temperature inner loop, which comprises a frame 1, install motor 2 in frame 1, install impeller shaft 3 in frame 1, install fan wheel 4 in 3 one ends of impeller shaft, and be located the outside spiral case 5 of fan wheel 4, motor 2's output shaft is connected with impeller shaft 3's the other end, frame 1 is located the outside of furnace body casing 6, spiral case 5 and fan wheel 4 are located the inside of furnace body casing 6, be equipped with furnace body through-hole 61 on the furnace body casing 6, impeller shaft 3 wears to establish in furnace body through-hole 61, and the diameter of furnace body through-hole 61 is greater than or equal to fan wheel 4's diameter. When the furnace body is normally used, the motor 2 drives the fan impeller 4 positioned in the furnace body shell 6 to rotate through the impeller shaft 3, and the volute 5 is arranged outside the fan impeller 4, so that the normal use requirement of high-temperature internal circulation in the furnace body is met; when needs overhaul, because the utility model discloses well motor 2, impeller shaft 3, fan wheel 4 all installs in frame 1, and frame 1 is located furnace body casing 6's outside, impeller shaft 3 wears to establish in furnace body through-hole 61, and the diameter of furnace body through-hole 61 is greater than or equal to fan wheel 4's diameter, only need the outside operation at furnace body casing 6, and put aside frame 1, just can shift out fan wheel 4 from furnace body casing 6 through furnace body through-hole 61, and realize fan wheel 4, impeller shaft 3, and motor 2 shifts out furnace body casing 6 along with frame 1 is whole, and then be convenient for the outside at furnace body casing 6 to the essential element of this fan, like motor 2, impeller shaft 3, and fan wheel 4 etc. maintain, the maintenance work of this horizontal centrifugal fan has been made things convenient for.

As shown in fig. 1, in the present embodiment, the impeller shaft 3 is mounted on the frame 1 through the bearing 7, and the mounting manner enables the weight of the fan impeller 4 and the impeller shaft 3 to be transmitted to the frame 1 through the bearing 7, so that the output shaft of the motor 2 will not bear the weight of the fan impeller 4 and the impeller shaft 3, and only the strength of the impeller shaft 3 needs to be ensured during horizontal mounting, thereby reducing the strength requirement on the output shaft of the motor 2, and enabling the size and specification of the output shaft of the motor 2 and the whole motor 2 to be smaller in the present embodiment, and the occupied space to be smaller, so that the horizontal centrifugal fan can be mounted in the limited space outside the furnace body conveniently. The number of the bearings 7 is two, and the two bearings 7 are distributed at intervals along the axial direction of the impeller shaft 3. Meanwhile, as shown in fig. 1, the output shaft of the motor 2 is connected with the impeller shaft 3 through the coupling 8 in this embodiment, which reduces the requirement for high temperature resistance of the motor 2. In this embodiment, the motor 2 may be a common motor.

As shown in fig. 1 to 3, in this embodiment, the frame 1 includes a bottom plate 11, two side plates 12 fixedly connected to two side edges of the bottom plate 11, and a mounting flange 13, end portions of the two side plates 12 and end portion of the bottom plate 11 are fixedly connected to the mounting flange 13, the motor 2 and the impeller shaft 3 are located in a mounting groove 14 formed between the two side plates 12 and the bottom plate 11, the mounting flange 13 is fixedly connected to an outer wall of the furnace body housing 6, the mounting flange 13 is provided with a flange through hole 131, and the impeller shaft 3 is inserted into the flange through hole 131. In the embodiment, the mounting flange 13 is fixedly connected with the outer wall of the furnace body shell 6 through bolts. When the maintenance is needed, the mounting flange 13 is only needed to be detached from the outer wall of the furnace body shell 6, the fan impeller 4, the impeller shaft 3 and the motor 2 can be integrally moved out of the furnace body shell 6 along with the frame 1 by moving the frame 1, and the maintenance on the fan impeller 4, the impeller shaft 3, the motor 2 and the like is facilitated. In this embodiment, the side plates 12 and the bottom plate 11 are both provided with reinforcing ribs.

As shown in fig. 1 and 2, in the present embodiment, a housing 15 is mounted on the frame 1, the housing 15, the two side plates 12 and the bottom plate 11 enclose a protection cavity, and the impeller shaft 3 is located in the protection cavity. In the embodiment, the impeller shaft 3 is isolated by the housing 15, the two side plates 12 and the bottom plate 11, so that the impeller shaft 3 is protected and prevented from being damaged by rotation.

As shown in fig. 1 and 3, a lifting lug 16 is welded on the side plate 12 in this embodiment, so that the whole rack 1 and the components mounted thereon can be lifted to a set position by the lifting lug 16. In the present embodiment, two lifting lugs 16 are welded to each side plate 12. In the embodiment, the mounting flange 13, the side plate 12, the bottom plate 11 and the lifting lugs 16 are integrally welded, the whole frame supports the weight of the whole fan, and the integral stability of the fan is ensured, so that the strength of the fan is very important.

As shown in fig. 1, the volute 5 is fixed to the inner wall of the furnace body housing 6 in this embodiment. The volute 5 in the embodiment is mainly used for increasing the wind pressure of the fan, is made of high-temperature stainless steel, and is directly welded to the inner wall of the furnace body shell 6 when the volute 5 is installed.

As shown in fig. 1, in the present embodiment, an insulating layer 91 is disposed in the furnace body through hole 61, and the insulating layer 91 is fixed on the frame 1. The heat preservation layer 91 is made of heat preservation materials, plays a role in heat insulation, prevents heat in the furnace body from being radiated outwards from the through hole 61 of the furnace body, and when the rack 1 is moved, the heat preservation layer 91 integrally moves along with the rack 1.

As shown in fig. 1, the impeller shaft 3 of the present embodiment is provided with a heat dissipating impeller 92. When the impeller shaft 3 rotates, the heat dissipation impeller 92 rotates together, and generates cooling air to dissipate heat from the impeller shaft 3 and the bearings 7 and the like. The heat dissipation impeller 92 is located between the insulating layer 91 and the frame 1 in this embodiment. When the impeller shaft 3 runs at a high speed, the heat dissipation impeller 92 runs along with the impeller shaft 3, and a certain amount of air is generated for the impeller shaft 3 and the bearing 7 to achieve the purpose of heat dissipation.

As shown in fig. 1, in the present embodiment, a compressed air pipe 93 is installed on the frame 1, and the compressed air pipe 93 is communicated with a compressed air source. The compressed air pipe 93 blows compressed air to the impeller shaft 3 and its vicinity to continuously cool the impeller shaft 3 and its vicinity, and has an effect of eliminating high-temperature heat conduction, and particularly, the compressed air is important when the heat radiation effect of the heat radiation impeller 92 is not significant when the impeller shaft 3 is operated at a low speed. In this embodiment, the compressed air pipe 93 is made of a stainless steel pipe.

In this embodiment, the bearing 7 is a high temperature bearing, which is mainly used to support the impeller shaft 3, and the impeller shaft 3 can conduct certain heat from the high temperature of the fan impeller 4, so that the high temperature bearing has certain requirement for temperature resistance. Meanwhile, the embodiment adopts a common motor as a power source. In the embodiment, the motor 2 is connected with the impeller shaft 3 through the coupler 8, the impeller shaft 3 is fixed on the frame 1 through two high-temperature-resistant bearings, the gravity of the fan impeller 4 is mainly supported by the impeller shaft 3 when the fan impeller runs, the impeller shaft 3 is similar to a cantilever beam at the moment, so that the requirement on the strength of the impeller shaft 3 is higher, the impeller shaft 3 needs to be designed to be a larger point, the strength of the impeller shaft 3 only needs to be ensured when the fan impeller is horizontally installed, and the size of a motor shaft and the overall size of the motor 2 are reduced; and the requirement on the high temperature resistance of the motor 2 is reduced, and the common motor with the connection mode can meet the requirement. In the embodiment, the whole of the fan removing volute 5 is arranged on the rack 1, the structural strength of the rack 1 ensures the whole stability of the fan, and the whole horizontal installation of the fan is realized. When the horizontal centrifugal fan needs to be overhauled, the impeller, the heat insulation layer 91, the motor 2 and the like can be integrally taken out and installed from the rack 1 only by detaching the rack 1 from the outer wall of the furnace body shell 6 outside the furnace body, so that the simplicity of the disassembly and the assembly of the fan outside the furnace body is realized; the self rigidity of the frame 1 can meet the stability of the whole fan in horizontal installation. In addition, the compressed air pipe 93 and the heat dissipation impeller 92 are arranged in the embodiment to cool the impeller shaft 3 doubly, when the motor 2 operates at a low speed, the cooling effect of the heat dissipation impeller 92 is not obvious, at the moment, the compressed air plays a role in supplementing heat for cooling the high-temperature heat conduction of the impeller shaft 3, and the high-temperature problem caused by the high-temperature heat conduction is well solved. In this embodiment, the furnace body shell 6 is provided with heat insulating material, and the furnace body shell 6 is also called furnace body heat insulating wall.

The horizontal centrifugal fan for high-temperature internal circulation in the embodiment adopts the structural design, so that the high-temperature fan is convenient to overhaul and disassemble, small in overall structure size, small in influence of high-temperature heat conduction on the motor 2, and suitable for the high-temperature internal circulation working condition higher than 700 ℃. The horizontal centrifugal fan for high-temperature internal circulation solves the problems of difficulty in overhauling, dismounting and mounting, overall structure size and high-temperature heat conduction of the high-temperature internal circulation centrifugal fan under the working condition of high-temperature internal circulation above 700 ℃.

To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims

1. The horizontal centrifugal fan for high-temperature internal circulation is characterized by comprising a rack (1), a motor (2) arranged on the rack (1), an impeller shaft (3) arranged on the rack (1), a fan impeller (4) arranged at one end of the impeller shaft (3) and a volute (5) positioned outside the fan impeller (4), wherein an output shaft of the motor (2) is connected with the other end of the impeller shaft (3), the rack (1) is positioned outside a furnace body shell (6), the volute (5) and the fan impeller (4) are positioned inside the furnace body shell (6), a furnace body through hole (61) is formed in the furnace body shell (6), the impeller shaft (3) penetrates through the furnace body through hole (61), and the diameter of the furnace body through hole (61) is larger than or equal to that of the fan impeller (4).

2. Horizontal centrifugal fan for high temperature internal circulation according to claim 1, characterized in that the impeller shaft (3) is mounted on the frame (1) by means of bearings (7).

3. Horizontal centrifugal fan for high temperature internal circulation according to claim 1, characterized in that the output shaft of the motor (2) is connected with the impeller shaft (3) through a coupling (8).

4. The horizontal centrifugal fan for high-temperature internal circulation according to claim 1, wherein the rack (1) comprises a bottom plate (11), two side plates (12) fixedly connected with two side edges of the bottom plate (11) respectively, and a mounting flange (13), ends of the two side plates (12) and an end of the bottom plate (11) are fixedly connected with the mounting flange (13), the motor (2) and the impeller shaft (3) are located in a mounting groove (14) formed between the two side plates (12) and the bottom plate (11), the mounting flange (13) is fixedly connected with the outer wall of the furnace body shell (6), a flange through hole (131) is formed in the mounting flange (13), and the impeller shaft (3) is arranged in the flange through hole (131) in a penetrating manner.

5. The horizontal centrifugal fan for high-temperature internal circulation according to claim 4, wherein a casing (15) is mounted on the frame (1), the casing (15), the two side plates (12) and the bottom plate (11) enclose a protection cavity, and the impeller shaft (3) is located in the protection cavity.

6. The horizontal centrifugal fan for high-temperature internal circulation according to claim 4, wherein lifting lugs (16) are welded on the side plates (12).

7. The horizontal centrifugal fan for high-temperature internal circulation according to claim 1, wherein the volute (5) is fixedly connected with the inner wall of the furnace body shell (6).

8. The horizontal centrifugal fan for high-temperature internal circulation according to claim 1, wherein an insulating layer (91) is arranged in the through hole (61) of the furnace body, and the insulating layer (91) is fixed on the frame (1).

9. Horizontal centrifugal fan for high temperature internal circulation according to claim 1, characterized in that a heat dissipating impeller (92) is mounted on the impeller shaft (3).

10. The horizontal centrifugal fan for high-temperature internal circulation according to claim 1 is characterized in that a compressed air pipe (93) is mounted on the frame (1), and the compressed air pipe (93) is communicated with a compressed air source.