CN114607636B - Draught fan for boiler system - Google Patents
Draught fan for boiler system Download PDFInfo
- Publication number
- CN114607636B CN114607636B CN202210185070.3A CN202210185070A CN114607636B CN 114607636 B CN114607636 B CN 114607636B CN 202210185070 A CN202210185070 A CN 202210185070A CN 114607636 B CN114607636 B CN 114607636B
- Authority
- CN
- China
- Prior art keywords
- induced draft
- draft fan
- arc
- inlet ring
- shaped part
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- 238000007789 sealing Methods 0.000 claims abstract description 49
- 239000000779 smoke Substances 0.000 claims abstract description 22
- 238000002485 combustion reaction Methods 0.000 claims abstract description 11
- 238000012806 monitoring device Methods 0.000 claims description 4
- 238000000034 method Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 17
- 238000007599 discharging Methods 0.000 abstract description 7
- 230000008676 import Effects 0.000 abstract description 4
- 230000007246 mechanism Effects 0.000 description 4
- 239000003517 fume Substances 0.000 description 3
- 230000004075 alteration Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/083—Sealings especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L17/00—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues
- F23L17/005—Inducing draught; Tops for chimneys or ventilating shafts; Terminals for flues using fans
Abstract
The invention discloses an induced draft fan for a boiler system, the boiler system comprises a boiler body, a burner, a combustion chamber, a heat exchanger, a smoke exhaust device and the induced draft fan, the induced draft fan is connected with the smoke exhaust device through a pipeline, the induced draft fan comprises a shell, an impeller and a motor, the impeller is arranged in a shell cavity of the shell, the impeller comprises a bottom plate (21), blades (22) and a cover plate (23), the blades are uniformly distributed along the circumferential direction and are connected between the bottom plate and the cover plate, an inlet ring (11) is arranged at an air inlet of the shell, and the inlet ring is arranged in parallel with the axial direction, and the induced draft fan is characterized in that: the upper end of blade is provided with first seal groove (24), and first seal groove is located the radial periphery of apron, and in the one end of import ring (11) stretched into first seal groove, import ring and first seal groove rotary seal cooperation. The invention can increase the air inlet quantity and the sealing effect, and reduce leakage, thereby improving the smoke discharging effect of the induced draft fan.
Description
Technical Field
The invention relates to the technical field of steam boiler systems and parts thereof, in particular to an induced draft fan for a boiler system.
Background
The boiler is an energy converter, which is a device for heating working medium water or other fluid to a certain parameter by using heat energy released by fuel combustion or other heat energy. As shown in fig. 1, the existing steam boiler system comprises a boiler body 10, a burner 20, a combustion chamber 30, a heat exchanger 40, a smoke exhaust device 50, a base frame 60, an induced draft fan, a pump mechanism, a valve assembly and a safety monitoring device, wherein one end of the boiler body 10 is provided with the burner 20, the other end of the boiler body is provided with the smoke exhaust device 50, the combustion chamber 30 and the heat exchanger 40 are arranged in the boiler body 10, the boiler body 10 is arranged on the base frame 60, the induced draft fan is connected with the smoke exhaust device 50 through a pipeline, the pump mechanism and the valve assembly are connected with the boiler body 10 through a pipeline, the induced draft fan is used for carrying out smoke exhaust operation on the boiler body 10 so as to ensure that smoke in the boiler body 10 can be exhausted in time, and the performance of the induced draft fan directly influences the smoke exhaust effect. However, the existing induced draft fan has the problem of large leakage caused by poor sealing performance between the impeller and the shell.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide an induced draft fan for a boiler system, the induced draft fan is provided with a first sealing groove at the upper end of a blade, the first sealing groove is positioned at the radial periphery of a cover plate, one end of an inlet ring extends into the first sealing groove, and the inlet ring is in rotary sealing fit with the first sealing groove, so that the sealing effect can be increased while the air inlet quantity is increased. The design of the second arc-shaped part and the second sealing groove can further improve the sealing effect between the impeller and the shell, reduce leakage and improve the smoke discharging effect of the induced draft fan.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a draught fan for boiler system, boiler system includes boiler body 10, combustor 20, combustion chamber 30, heat exchanger 40, fume extractor 50, bed frame 60, the draught fan, the valve subassembly, safety monitoring device, the one end of boiler body is provided with the combustor, the other end is provided with fume extractor, this internal combustion chamber that is provided with of boiler, heat exchanger, boiler body installs on the bed frame, the draught fan is connected with fume extractor through the pipeline, the draught fan includes casing 1, impeller 2, motor 3, the impeller is installed in the casing intracavity of casing, the periphery of motor is connected with the impeller, the impeller includes bottom plate 21, blade 22, apron 23, a plurality of blades are followed circumference evenly distributed and are connected between bottom plate and apron, the casing has inlet ring 11 in its air intake department, inlet ring and axial parallel arrangement, its characterized in that: a first seal groove 24 is arranged at the upper end of the blade 22, the first seal groove is positioned at the radial periphery of the cover plate, one end of the inlet ring 11 extends into the first seal groove, and the inlet ring is in rotary seal fit with the first seal groove.
Further, the radially inner periphery of the inlet ring 11 is provided with a first arcuate portion 12 projecting radially inwardly from the inlet ring.
Further, the radially outer edge of the cover plate 23 has a second arc portion 25, which is a concave arc portion, and the second arc portion is matched with or parallel to the first arc portion 12 in shape.
Further, the bottom end of the first arc-shaped portion 12 has the same axial position as the upper end of the vane 22, and the lower end of the second arc-shaped portion 25 abuts the first seal groove 24.
Further, the lower end of the inlet ring 11 has a plurality of second sealing grooves 13, and the second sealing grooves are located in the first sealing grooves 14.
Further, the upper ends of the vanes 22, which are located at the radial outer periphery of the inlet ring 11, have no cover plate portion.
A boiler system comprises an induced draft fan and a pipeline system for the boiler system, wherein the induced draft fan is a centrifugal fan.
According to the induced draft fan for the boiler system, the first sealing groove is formed in the upper end of the blade, the first sealing groove is arranged on the radial periphery of the cover plate, one end of the inlet ring extends into the first sealing groove, and the inlet ring is in rotary sealing fit with the first sealing groove, so that the sealing effect can be improved while the air inlet quantity is increased. The design of the second arc-shaped part and the second sealing groove can further improve the sealing effect between the impeller and the shell, reduce leakage and improve the smoke discharging effect of the induced draft fan.
Drawings
FIG. 1 is a schematic diagram of a prior art steam boiler system;
FIG. 2 is a schematic view of the structure of the induced draft fan for the boiler system according to the present invention;
fig. 3 is a schematic view of a partial enlarged structure of an induced draft fan for a boiler system according to the present invention.
In the figure: the boiler comprises a boiler body 10, a burner 20, a combustion chamber 30, a heat exchanger 40, a smoke exhaust device 50, a base frame 60, a shell 1, an impeller 2, a motor 3, an inlet ring 11, a first arc-shaped part 12, a second sealing groove 13, a bottom plate 21, blades 22, a cover plate 23, a first sealing groove 24 and a second arc-shaped part 25.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments of the present invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention is described in further detail below with reference to the accompanying drawings.
As shown in fig. 1-3, a draught fan for a boiler system, the boiler system comprises a boiler body 10, a burner 20, a combustion chamber 30, a heat exchanger 40, a smoke exhaust device 50, a base frame 60, a draught fan, a pump mechanism, a valve assembly and a safety monitoring device, wherein one end of the boiler body 10 is provided with the burner 20, the other end is provided with the smoke exhaust device 50, the combustion chamber 30 and the heat exchanger 40 are arranged in the boiler body 10, the boiler body 10 is arranged on the base frame 60, the draught fan is connected with the smoke exhaust device 50 through a pipeline, the pump mechanism and the valve assembly are connected with the boiler body 10 through a pipeline, the draught fan is a centrifugal fan, the centrifugal fan comprises a shell 1, an impeller 2 and a motor 3, the impeller 2 is arranged in a shell cavity of the shell 1, the periphery of the motor 3 is connected with the impeller 2, the impeller 2 comprises a bottom plate 21, blades 22 and a cover plate 23, the blades 22 are uniformly distributed along the circumferential direction and are connected between the bottom plate 21 and the cover plate 23, the shell 1 is provided with an inlet ring 11 at an air inlet ring 11, and the inlet ring 11 is axially arranged in parallel, and the boiler system is characterized in that: the upper end of blade 22 is provided with first seal groove 24, and first seal groove 24 is located the radial periphery of apron 23, and the one end of import ring 11 stretches into in the first seal groove 24, import ring 11 and first seal groove 24 rotary seal cooperation.
According to the induced draft fan for the boiler system, the first sealing groove 24 is formed in the upper ends of the blades 22, the first sealing groove 24 is arranged on the radial periphery of the cover plate 23, one end of the inlet ring 11 extends into the first sealing groove 24, and the inlet ring 11 is in rotary sealing fit with the first sealing groove 24, so that the sealing effect can be increased while the air inlet quantity is increased, and the smoke discharging effect of the induced draft fan is improved.
Further, the radially inner periphery of the inlet ring 11 is provided with a first arc-shaped portion 12, and the first arc-shaped portion 12 protrudes radially inward from the inlet ring 11.
Further, the radially outer edge of the cover plate 23 has a second arc portion 25, where the second arc portion 25 is a concave arc portion, and the second arc portion 25 is matched with or parallel to the first arc portion 12 in shape, that is, there is an equal sealing gap between the second arc portion 25 and the first arc portion 12. The bottom end of first arcuate portion 12 has the same axial position/dimension as the upper end of blade 22 and the lower end of second arcuate portion 25 abuts first seal groove 24.
Further, the lower end of the inlet ring 11 has a plurality of second seal grooves 13, the second seal grooves 13 being located within the first seal groove 24.
According to the invention, through the design of the second arc-shaped part 25 and the second sealing groove 13, the sealing effect between the impeller 2 and the shell 1 can be further improved, leakage is reduced, and the smoke discharging effect of the induced draft fan is improved.
Further, the upper ends of the blades 22, which are located at the radially outer periphery of the inlet ring 11, do not have a cover plate 23 portion, reducing the influence/interference on the sealing.
A boiler system comprises the induced draft fan and a pipeline system, wherein the induced draft fan is a centrifugal fan.
According to the induced draft fan for the boiler system, the first sealing groove 24 is formed in the upper ends of the blades 22, the first sealing groove 24 is arranged on the radial periphery of the cover plate 23, one end of the inlet ring 11 extends into the first sealing groove 24, and the inlet ring 11 is in rotary sealing fit with the first sealing groove 24, so that the sealing effect can be increased while the air inlet quantity is increased, and the smoke discharging effect of the induced draft fan is improved. Through the design of the second arc-shaped part 25 and the second sealing groove 13, the sealing effect between the impeller 2 and the shell 1 can be further improved, leakage is reduced, and the smoke discharging effect of the induced draft fan is improved.
The above-described embodiments are illustrative of the present invention and are not intended to be limiting, and it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents.
Claims (4)
1. An induced draft fan for a boiler system comprises a boiler body (10), a burner (20), a combustion chamber (30), a heat exchanger (40), a smoke exhaust device (50), a base frame (60), an induced draft fan, a valve assembly and a safety monitoring device, wherein one end of the boiler body is provided with the burner, the other end of the boiler body is provided with the smoke exhaust device, the combustion chamber and the heat exchanger are arranged in the boiler body, the boiler body is arranged on the base frame, the induced draft fan is connected with the smoke exhaust device through a pipeline and comprises a shell (1), an impeller (2) and a motor (3), the impeller is arranged in a shell cavity of the shell, the periphery of the motor is connected with the impeller, the impeller comprises a bottom plate (21), blades (22) and a cover plate (23), the blades are uniformly distributed along the circumferential direction and are connected between the bottom plate and the cover plate, the shell is provided with an inlet ring (11) at an air inlet of the shell, the inlet ring is arranged in parallel with the axial direction,
the method is characterized in that: the upper ends of the blades (22) are provided with first sealing grooves (24), the first sealing grooves are positioned on the radial periphery of the cover plate, one end of an inlet ring (11) extends into the first sealing grooves, and the inlet ring is in rotary sealing fit with the first sealing grooves;
the radial inner periphery of the inlet ring (11) is provided with a first arc-shaped part (12), and the first arc-shaped part protrudes from the inlet ring to the radial inner side; the radial outer edge of the cover plate (23) is provided with a second arc-shaped part (25), the second arc-shaped part is a concave arc-shaped part, and the second arc-shaped part is matched with the first arc-shaped part (12) in shape; the bottom end of the first arc-shaped part (12) and the upper end of the blade (22) have the same axial position, and the lower end of the second arc-shaped part (25) is adjacent to the first sealing groove (24).
2. A draught fan for a boiler system according to claim 1, characterized in that the lower end of the inlet ring (11) is provided with a plurality of second sealing grooves (13) which are located in the first sealing grooves (14).
3. A draught fan for a boiler system according to claim 2, wherein the upper ends of the blades (22) are located at the radial outer periphery of the inlet ring (11) without a cover plate portion.
4. A boiler system comprising an induced draft fan, a pipe system for a boiler system according to any one of claims 1-3, the induced draft fan being a centrifugal fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210185070.3A CN114607636B (en) | 2022-02-28 | 2022-02-28 | Draught fan for boiler system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210185070.3A CN114607636B (en) | 2022-02-28 | 2022-02-28 | Draught fan for boiler system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114607636A CN114607636A (en) | 2022-06-10 |
| CN114607636B true CN114607636B (en) | 2024-02-13 |
Family
ID=81858805
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210185070.3A Active CN114607636B (en) | 2022-02-28 | 2022-02-28 | Draught fan for boiler system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114607636B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2596484A1 (en) * | 1986-03-25 | 1987-10-02 | Marelli & C Spa Ercole | Sealing device for rotary machines |
| DE19613486A1 (en) * | 1996-04-04 | 1997-10-09 | Grundfos As | Seal on low-pressure end of centrifugal pump rotor |
| JP2002005091A (en) * | 2000-06-22 | 2002-01-09 | Daikin Ind Ltd | Multi-blade fan |
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| JP2010133297A (en) * | 2008-12-03 | 2010-06-17 | Daikin Ind Ltd | Centrifugal blower |
| CN202851091U (en) * | 2012-09-26 | 2013-04-03 | 上海交通大学 | Tooth top clearance local resistance-increasing seal tooth type structure |
| CN204663959U (en) * | 2015-05-29 | 2015-09-23 | 西安格瑞电力科技有限公司 | A kind of air intake seal arrangement putting forward effect for centrifugal blower |
| CN105508291A (en) * | 2008-05-27 | 2016-04-20 | 伟尔矿物澳大利亚私人有限公司 | Impeller |
| CN206522916U (en) * | 2017-01-26 | 2017-09-26 | 孙全熙 | A kind of energy-saving gas burning boiler with less environmental |
| RU2656098C1 (en) * | 2016-12-13 | 2018-06-01 | Акционерное общество "Гидрогаз" (АО "Гидрогаз") | Groove seal of a pump impeller |
| CN109237169A (en) * | 2018-09-12 | 2019-01-18 | 安徽汉采密封件科技有限公司 | A kind of externally positioned type conduit seals |
| CN209295083U (en) * | 2018-10-24 | 2019-08-23 | 江西南方锅炉股份有限公司 | A kind of mating waste heat steam boiler of novel biomass gasifying |
| CN113757164A (en) * | 2020-06-04 | 2021-12-07 | 林内株式会社 | Fan device |
| CN215566726U (en) * | 2021-08-20 | 2022-01-18 | 上海尚实能源科技有限公司 | Semi-enclosed centrifugal compressor impeller |
-
2022
- 2022-02-28 CN CN202210185070.3A patent/CN114607636B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2596484A1 (en) * | 1986-03-25 | 1987-10-02 | Marelli & C Spa Ercole | Sealing device for rotary machines |
| DE19613486A1 (en) * | 1996-04-04 | 1997-10-09 | Grundfos As | Seal on low-pressure end of centrifugal pump rotor |
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| CN200989322Y (en) * | 2006-11-08 | 2007-12-12 | 浙江工业大学 | Double-sealing face vane type pump |
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| JP2010133297A (en) * | 2008-12-03 | 2010-06-17 | Daikin Ind Ltd | Centrifugal blower |
| CN202851091U (en) * | 2012-09-26 | 2013-04-03 | 上海交通大学 | Tooth top clearance local resistance-increasing seal tooth type structure |
| CN204663959U (en) * | 2015-05-29 | 2015-09-23 | 西安格瑞电力科技有限公司 | A kind of air intake seal arrangement putting forward effect for centrifugal blower |
| RU2656098C1 (en) * | 2016-12-13 | 2018-06-01 | Акционерное общество "Гидрогаз" (АО "Гидрогаз") | Groove seal of a pump impeller |
| CN206522916U (en) * | 2017-01-26 | 2017-09-26 | 孙全熙 | A kind of energy-saving gas burning boiler with less environmental |
| CN109237169A (en) * | 2018-09-12 | 2019-01-18 | 安徽汉采密封件科技有限公司 | A kind of externally positioned type conduit seals |
| CN209295083U (en) * | 2018-10-24 | 2019-08-23 | 江西南方锅炉股份有限公司 | A kind of mating waste heat steam boiler of novel biomass gasifying |
| CN113757164A (en) * | 2020-06-04 | 2021-12-07 | 林内株式会社 | Fan device |
| CN215566726U (en) * | 2021-08-20 | 2022-01-18 | 上海尚实能源科技有限公司 | Semi-enclosed centrifugal compressor impeller |
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Also Published As
| Publication number | Publication date |
|---|---|
| CN114607636A (en) | 2022-06-10 |
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