CN214499476U - High-temperature flue gas circulating fan - Google Patents
High-temperature flue gas circulating fan Download PDFInfo
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- CN214499476U CN214499476U CN202023226566.6U CN202023226566U CN214499476U CN 214499476 U CN214499476 U CN 214499476U CN 202023226566 U CN202023226566 U CN 202023226566U CN 214499476 U CN214499476 U CN 214499476U
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- flue gas
- main shaft
- temperature flue
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Abstract
The utility model discloses a high-temperature flue gas circulating fan, which comprises a fan shell and a main shaft, wherein one end of the main shaft extends into the fan shell, one end of the main shaft extending into the fan shell is provided with an impeller, and the main shaft is arranged on a bearing box; the main shaft is provided with a sealing assembly on the outer side of the fan shell, the sealing assembly comprises a dynamic sealing pair and a static sealing pair, an annular supporting piece is arranged between the sealing assembly and the fan shell, one end of the supporting piece is fixedly connected to the fan shell, and the end face of one end of the static sealing pair is matched with the end face of the other end of the supporting piece and is fixedly connected to the supporting piece. The fan adopts a single-stage cantilever structure, is used for conveying high-temperature flue gas at 650 ℃, and is convenient to install and replace a sealing assembly; meanwhile, the problem that the sealing assembly is difficult to disassemble and replace when the fan shell deforms due to high temperature can be solved.
Description
Technical Field
The utility model relates to a fan technical field, in particular to high temperature flue gas circulating fan.
Background
The centrifugal blower is widely applied in a plurality of fields, particularly in special industries such as chemical industry, metallurgy and the like, can meet the use requirements of different media and various different scenes, and safe, continuous and efficient operation is an important evaluation index influencing the use performance of the blower.
The single-stage cantilever type blower has the characteristics of high efficiency, small occupied area and convenience in installation, so that the centrifugal blower with the structure is more and more in demand. However, the existing single-stage cantilever type centrifugal blower has the structural characteristics that the failure rate is higher when the blower is applied to the treatment of high-temperature flue gas, great problems are caused to the maintenance of equipment, and the operation cost of the equipment is increased.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the above-mentioned technical problem who exists among the prior art, provide a high temperature flue gas circulating fan, solve the existing fault rate height of current single-stage cantilever type air-blower structure, maintain inconvenient problem.
In order to solve the technical problem, the utility model discloses a technical scheme as follows:
a high-temperature flue gas circulating fan comprises a fan shell and a main shaft, wherein one end of the main shaft extends into the fan shell, one end of the main shaft extending into the fan shell is provided with an impeller, and the main shaft is arranged on a bearing box;
the main shaft is provided with a sealing assembly on the outer side of the fan shell, the sealing assembly comprises a dynamic sealing pair and a static sealing pair, an annular supporting piece is arranged between the sealing assembly and the fan shell, one end of the supporting piece is fixedly connected to the fan shell, and the end face of one end of the static sealing pair is matched with the end face of the other end of the supporting piece and is fixedly connected to the supporting piece.
In the above technical scheme, further, an annular fixing flange is arranged at one end of the support piece close to the static seal pair along the outer edge, a connecting flange is arranged on the static seal pair, and the connecting flange and the fixing flange are arranged in a matched manner and connected through a bolt.
Among the above-mentioned technical scheme, furtherly, the support flange is provided with on the support piece with the opposite one side of mounting flange, support flange and fan casing cooperation setting, form annular space of stepping down between support flange and the mounting flange.
In the above technical scheme, further, a limit flange is arranged at one end of the static seal pair, which is located at the connecting flange, and a positioning boss is arranged at one end of the support piece, which is located at the fixing flange, and the positioning boss can be matched in the limit flange.
In the above technical solution, further, the sealing assembly adopts a comb tooth sealing structure.
In the above technical solution, further, a sealing air channel is provided on the static sealing pair, and the sealing air channel is communicated with the sealing surface of the sealing assembly.
In the above technical scheme, further, a water cooling cavity is arranged in the static seal pair, and a water inlet and a water outlet are arranged on the static seal pair.
In the above technical scheme, further, a heat dissipation disc is arranged on the main shaft and between the sealing assembly and the bearing box.
In the above technical solution, further, a bearing assembly is arranged between the bearing box and the main shaft at one end close to the impeller, the bearing assembly includes at least two bearings, and the bearings are arranged at intervals.
In the above technical scheme, further, the bearings adopt radial ball bearings, and a support sleeve is arranged between the bearings.
The utility model discloses the beneficial effect who has:
1) the fan adopts a single-stage cantilever structure and is used for conveying high-temperature flue gas at 650 ℃, a supporting piece is arranged between the fan shell and the sealing assembly, the sealing assembly is connected with the fan shell through the supporting piece, direct connection between the sealing assembly and the fan shell can be avoided, and the sealing assembly is convenient to install and replace; meanwhile, the problem that the sealing assembly is difficult to disassemble and replace when the fan shell deforms due to high temperature can be solved.
2) Set up cooperation connection structure between support piece and seal assembly, carry out assistance-localization real-time to seal assembly, can effectively guarantee the axiality between static seal pair and the dynamic seal pair among the broach seal structure, realize the good cooperation between static seal pair and the dynamic seal pair, reduce the wearing and tearing to seal tooth among the seal assembly, improve seal assembly's life.
3) Set up support piece between fan casing and seal assembly, can effectively keep apart between fan casing and the seal assembly, reduce high temperature to seal assembly's influence.
4) The bearing assembly structure between the main shaft and the bearing box is arranged in the fan, so that the bearing assembly structure can bear certain axial thrust, has larger bearing capacity, can be well applied to the single-stage cantilever structure, can keep the bearing box away from the fan shell, reduces the influence of high temperature on the bearing box, and improves the stability of the fan in operation.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic view of the structure in the direction of D-D in fig. 1.
Fig. 3 is a partial schematic view of a portion a of fig. 1.
Fig. 4 is a partial schematic view of fig. 1 at B.
In the figure:
100. a main shaft;
200. a bearing box 201, a bearing 202 and a support sleeve;
301. the fan comprises a fan shell 302, an impeller 321 and an impeller air inlet; 303. an air duct; 304. inlet channel, 305, outlet channel;
400. the sealing assembly comprises a sealing assembly 401, a dynamic sealing pair 402, a static sealing pair 421, a connecting flange 422, a limiting flange 423, a water cooling cavity 403 and a sealing air channel;
500. the device comprises a support member 501, a fixing flange 502, a support flange 503, an abdicating space 504 and a positioning boss;
600. a heat dissipation plate.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1 and 2, the high-temperature flue gas recirculation fan in this embodiment includes a fan housing 301 and a main shaft 100, one end of the main shaft 100 extends into the fan housing 301, one end of the main shaft 100 extending into the fan housing is provided with an impeller 302, and the main shaft 100 is disposed on a bearing box 200. An air inlet channel 304 is arranged at the front end of the fan shell 301, an air outlet channel 305 is arranged on one side of the fan shell 301, an air guide cylinder 303 is arranged in the air inlet channel 304, one end of the air guide cylinder 303 is fixedly connected to the fan shell 301, and the other end of the air guide cylinder 303 extends into the impeller air inlet 321, so that the air inlet efficiency is improved. Here, the air duct 303 adopts a straight-tube structure, and one end of the air duct 303 extending into the air inlet of the impeller is provided with a bell-mouth structure, so as to further improve the air inlet efficiency.
As shown in fig. 1 and 3, a sealing assembly 400 is arranged on the main shaft 100 and located outside the fan casing, the sealing assembly 400 includes a dynamic sealing pair 401 and a static sealing pair 402, an annular supporting member 500 is arranged between the sealing assembly 111 and the fan casing 301, one end of the supporting member 500 is fixedly connected to the fan casing 301, and one end face of the static sealing pair 402 is matched with the other end face of the supporting member 500 and is fixedly connected to the supporting member 500. Set up support piece between fan casing and seal assembly, cooperate the installation to seal assembly to can avoid the lug connection between seal assembly and the fan casing, when avoiding fan casing to take place to warp under high temperature operational environment, seal assembly is difficult to dismantle, seal assembly's change, the inconvenient problem of installation.
Specifically, in this embodiment, an annular fixing flange 501 is disposed on the support 500 along the outer edge at one end of the static seal pair, a connecting flange 421 is disposed on the static seal pair 402, and the connecting flange 421 and the fixing flange 501 are disposed in a matching manner and connected by bolts, so as to facilitate the installation of the sealing assembly on the support. Meanwhile, a supporting flange 502 can be arranged on one side of the supporting piece 500 opposite to the fixing flange, the supporting flange 502 is arranged in a matching manner with the fan shell 301, and an annular yielding space 503 is formed between the supporting flange 502 and the fixing flange 501. The matching area between the supporting piece and the fan shell can be increased by arranging the supporting flange, the strength of a connecting structure between the supporting piece and the fan shell is increased, a yielding space is formed between the supporting flange and the fixing flange, and the operation of mounting and dismounting between the supporting piece and the sealing piece can be facilitated.
A limit flange 422 is arranged at one end of the static sealing pair 402 positioned at the connecting flange, and a positioning boss 504 is arranged at one end of the fixed flange 501 on the support 500, wherein the positioning boss 504 can be matched in the limit flange 422. When the static sealing pair is installed, the static sealing pair is subjected to auxiliary positioning through the limiting matching between the limiting flange and the positioning boss, so that the good coaxiality between the static sealing pair and the dynamic sealing pair is ensured, the abrasion of the sealing assembly is reduced while the static sealing pair is conveniently installed, and the service life of the sealing assembly is prolonged.
In the present embodiment, the sealing assembly 400 employs a comb-tooth sealing structure. And a sealing air channel 403 is arranged on the static sealing pair 402, the sealing air channel 403 is communicated with the sealing surface of the sealing assembly, and compressed air is introduced into the sealing surface through the sealing air channel to further seal the sealing surface, so that the sealing performance of the sealing assembly is further improved.
A water cooling cavity 423 is arranged in the static sealing pair 402, and a water inlet and a water outlet are arranged on the static sealing pair. Circulating water is introduced into the water cooling cavity through the water inlet and the water outlet to cool the sealing assembly.
A heat dissipation disc 600 is arranged between the sealing assembly and the bearing box on the main shaft 100, so that the influence of high temperature on the bearing box is reduced, and the running stability of the fan is ensured.
The fan in this embodiment adopts single-stage cantilever structure for the transport of 650 ℃ high temperature flue gas, for reducing the influence of high temperature to the bearing box, need set up the bearing box in the position of keeping away from the fan casing as far as possible, and set up the heat dissipation dish between bearing box and fan casing, must increase the length that the main shaft stretches out outside the bearing box like this, need bear great radial load near impeller one end between bearing box and the main shaft this moment, this kind of single-stage impeller can produce axial thrust effect to the main shaft when the operation simultaneously, in complicated atress condition, the bearing structure between main shaft and the bearing box has been set up in this embodiment. Specifically, as shown in fig. 4, a bearing assembly is arranged between the bearing box 200 and the main shaft 100 at one end close to the impeller, the bearing assembly comprises two bearings 700, and the bearings 700 are arranged at intervals; the bearings 700 are radial ball bearings, and the support sleeve 202 is arranged between the bearings 700, so that the bearing box can bear certain axial thrust and can bear larger radial load, and the stable operation of the fan is ensured.
The present invention is not limited to the above description and drawings, but should be understood as being illustrative and not restrictive, and the technical features can be replaced and modified without creative efforts by those skilled in the art according to the technical content disclosed, all falling within the scope of the present invention.
Claims (10)
1. A high-temperature flue gas circulating fan is characterized by comprising a fan shell and a main shaft, wherein one end of the main shaft extends into the fan shell, one end of the main shaft extending into the fan shell is provided with an impeller, and the main shaft is arranged on a bearing box;
the main shaft is provided with a sealing assembly on the outer side of the fan shell, the sealing assembly comprises a dynamic sealing pair and a static sealing pair, an annular supporting piece is arranged between the sealing assembly and the fan shell, one end of the supporting piece is fixedly connected to the fan shell, and the end face of one end of the static sealing pair is matched with the end face of the other end of the supporting piece and is fixedly connected to the supporting piece.
2. The high-temperature flue gas circulating fan according to claim 1, wherein an annular fixing flange is arranged at one end of the support piece close to the static sealing pair along the outer edge, a connecting flange is arranged on the static sealing pair, and the connecting flange and the fixing flange are arranged in a matched mode and connected through bolts.
3. The high-temperature flue gas recirculation fan of claim 2, wherein a support flange is disposed on a side of the support member opposite to the fixing flange, the support flange is disposed in cooperation with the fan housing, and an annular abdicating space is formed between the support flange and the fixing flange.
4. The high-temperature flue gas circulating fan according to claim 2 or 3, wherein a limit flange is arranged at one end of the static sealing pair, which is located at the connecting flange, and a positioning boss is arranged at one end of the support piece, which is located at the fixing flange, and the positioning boss can be matched in the limit flange.
5. The high-temperature flue gas recirculation fan of claim 1, wherein the sealing assembly is a comb sealing structure.
6. The high-temperature flue gas circulating fan according to claim 5, wherein a sealing gas channel is arranged on the static sealing pair and communicated with the sealing surface of the sealing assembly.
7. The high-temperature flue gas circulating fan according to claim 1, wherein a water cooling cavity is arranged in the static sealing pair, and a water inlet and a water outlet are arranged on the static sealing pair.
8. The high-temperature flue gas recirculation fan of claim 1, wherein a heat dissipation disc is disposed on the main shaft between the seal assembly and the bearing housing.
9. The high-temperature flue gas recirculation fan according to claim 1 or 8, wherein a bearing assembly is arranged between the bearing box and the main shaft at one end close to the impeller, the bearing assembly comprises at least two bearings, and the bearings are arranged at intervals.
10. The high-temperature flue gas circulating fan according to claim 9, wherein the bearings are radial ball bearings, and a support sleeve is arranged between the bearings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023226566.6U CN214499476U (en) | 2020-12-28 | 2020-12-28 | High-temperature flue gas circulating fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023226566.6U CN214499476U (en) | 2020-12-28 | 2020-12-28 | High-temperature flue gas circulating fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214499476U true CN214499476U (en) | 2021-10-26 |
Family
ID=78211092
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023226566.6U Active CN214499476U (en) | 2020-12-28 | 2020-12-28 | High-temperature flue gas circulating fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214499476U (en) |
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2020
- 2020-12-28 CN CN202023226566.6U patent/CN214499476U/en active Active
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220104 Address after: 610499 No. 18, Xingrui Road, huaikou Town, Jintang County, Chengdu City, Sichuan Province (Jintang County Industrial Development Zone) Patentee after: Sichuan Sanwei Fan Manufacturing Co.,Ltd. Address before: 610100 Bai He Zhen Chang Yuan Cun, Longquanyi District, Chengdu City, Sichuan Province Patentee before: SICHUAN SANWEI BLOWER LTD. |