CN114562716B - Steam boiler system with air blowing mechanism - Google Patents
Steam boiler system with air blowing mechanism Download PDFInfo
- Publication number
- CN114562716B CN114562716B CN202210185042.1A CN202210185042A CN114562716B CN 114562716 B CN114562716 B CN 114562716B CN 202210185042 A CN202210185042 A CN 202210185042A CN 114562716 B CN114562716 B CN 114562716B
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- China
- Prior art keywords
- arc
- shaped groove
- impeller
- guide vane
- steam boiler
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- 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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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
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- 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
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- 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
- F04D29/40—Casings; Connections of working fluid
- F04D29/42—Casings; Connections of working fluid for radial or helico-centrifugal pumps
- F04D29/44—Fluid-guiding means, e.g. diffusers
- F04D29/441—Fluid-guiding means, e.g. diffusers especially adapted for elastic fluid pumps
- F04D29/444—Bladed diffusers
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- 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
- F23L5/00—Blast-producing apparatus before the fire
- F23L5/02—Arrangements of fans or blowers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a steam boiler system with a blowing mechanism, which comprises a boiler body, a burner, a combustion chamber, a heat exchanger, a smoke exhaust device and a blowing mechanism, wherein the blower comprises an impeller and a shell, and the impeller comprises a chassis, a cover disc, blades and an inlet ring, and is characterized in that: the corner of the inlet ring (4) is provided with a first arc-shaped groove (41), a plurality of first guide vanes (42) are arranged in the first arc-shaped groove, a second arc-shaped groove (51) is arranged at a position of the shell (5) corresponding to the inlet ring, and a plurality of second guide vanes (52) are arranged in the second arc-shaped groove; on the circumference, the first arc-shaped groove and the second arc-shaped groove form a whole circular ring, and a circular backflow cavity is formed between the first arc-shaped groove and the second arc-shaped groove; a return channel (43) is provided in the inlet ring. The invention can effectively inhibit the leakage of the air flow in the impeller gap to the impeller inlet, improves the sealing performance, reduces the flow loss and further improves the overall efficiency of the blower.
Description
Technical Field
The invention relates to the technical field of steam boiler systems and parts thereof, in particular to a steam boiler system with a blowing mechanism.
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 conventional 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, a blowing mechanism, 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 blowing mechanism is connected with the boiler body 10 through a pipeline, the pump mechanism and the valve assembly are connected with the boiler body 10 through pipelines, the blowing mechanism is used for supplying the boiler body 10 with combustion gas/air with required flow, and certain requirements are imposed on the performance of the blowing mechanism.
In operation of the prior art blower mechanism/fan, although a sealing arrangement is provided at the impeller inlet, a portion of the air flow in the impeller gap between the cover disc and the housing is still recirculated through the sealing gap to the impeller inlet. In order to reduce backflow, the existing sealing structure adopts a sealing ring, a labyrinth seal and a guide vane type sealing structure, but the existing sealing structure has the problems that the backflow inhibition effect is poor, leakage flow cannot be guided back to an impeller gap, and accordingly flow loss is large.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a steam boiler system with a blowing mechanism, when a blower works, under the action of a first guide vane and a second guide vane, the leakage of air flow in an impeller gap G between a cover disc of an impeller and a shell along a sealing gap into a circular backflow cavity can be restrained/reduced; for the air flow which partially flows back into the circular backflow cavity, the air flow is guided to the backflow channel under the action of the first guide vane and the second guide vane and is guided back to the impeller gap G through the backflow channel, so that the leakage of the air flow in the impeller gap G to the impeller inlet can be effectively restrained, the sealing performance is improved, the flow loss is reduced, and the overall efficiency of the blower is improved.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
the utility model provides a steam boiler system with blast mechanism, steam boiler system includes boiler body (10), combustor (20), combustion chamber (30), heat exchanger (40), fume extractor (50), bed frame (60), blast mechanism, pump mechanism, valve assembly, safety monitoring device, the one end of boiler body is provided with the combustor, the other end is provided with fume extractor, be provided with combustion chamber in the boiler body, heat exchanger, boiler body installs on the bed frame, blast mechanism is connected with the boiler body through the pipeline, pump mechanism, valve assembly is connected with the boiler body through the pipeline, blast mechanism is the air-blower, the air-blower includes impeller, casing (5), the impeller is installed in the casing, the impeller includes chassis (1), the cover dish (2), blade (3), import ring (4), a plurality of blades are along circumference evenly distributed and connect between chassis and the cover dish, the import department of cover dish has import ring, its characterized in that: the inlet ring (4) comprises a first arc-shaped groove (41) and first guide vanes (42), wherein a first arc-shaped groove is formed in the corner of the inlet ring, a plurality of first guide vanes uniformly distributed along the circumferential direction are arranged in the first arc-shaped groove, the first guide vanes rotate along with the impeller, a second arc-shaped groove (51) is formed in the position, corresponding to the inlet ring, of the shell, a plurality of second guide vanes (52) uniformly distributed along the circumferential direction are arranged in the second arc-shaped groove, and the second guide vanes are fixed on the shell; on the circumference, the first arc-shaped groove (41) and the second arc-shaped groove (51) form a whole circular ring, the circle centers of the first arc-shaped groove and the second arc-shaped groove are basically the same, and a circular backflow cavity is formed between the first arc-shaped groove and the second arc-shaped groove; one or more backflow channels (43) are arranged in the inlet ring, one end of each backflow channel is communicated with a flow channel between two adjacent first guide vanes, and the other end of each backflow channel is communicated with an impeller gap G between the cover disc and the shell.
Further, the first guide vane (42) is an arc vane, and the installation angle between the first guide vane and the axis is 15-25 degrees; the second guide vane (52) is an arc vane having a mounting angle of- (15-25 DEG) with the axis, i.e. opposite to the mounting angle of the first guide vane.
Further, the first guide vane (42) and the second guide vane (52) are located in the fourth and second quadrants, respectively, in the circumferential direction.
Further, an arc-shaped portion (53) is arranged on one side, close to the first guide vane (42), of the second guide vane (52), and the arc-shaped portion is consistent with the bending direction of the second arc-shaped groove (51).
Further, an inclined surface (54) is arranged on the shell (5) and positioned on the right side of the circular backflow cavity, and a sealing gap is formed between the inclined surface and the outer peripheral surface of the inlet ring (4).
Further, the return channel (43) comprises a horizontal section, an inclined section, which substantially coincides with the inclination direction of the cover disc (2) or is substantially parallel to the cover disc, the channel cross-sectional area of the return channel decreasing gradually from the circular return chamber end to the impeller gap G end, so that the air flow is guided back to the impeller gap G through the return channel (43).
According to the steam boiler system with the air blowing mechanism, when the air blower works, under the action of the first guide vane and the second guide vane, leakage of air flow in the impeller gap G between the cover disc of the impeller and the shell body along the sealing gap into the circular backflow cavity can be restrained/reduced; for the air flow which partially flows back into the circular backflow cavity, the air flow is guided to the backflow channel under the action of the first guide vane and the second guide vane and is guided back to the impeller gap G through the backflow channel, so that the leakage of the air flow in the impeller gap G to the impeller inlet can be effectively restrained, the sealing performance is improved, the flow loss is reduced, and the overall efficiency of the blower is improved.
Drawings
FIG. 1 is a schematic diagram of a prior art steam boiler system;
FIG. 2 is a schematic view of a sealing device/sealing structure of a blower mechanism according to the present invention
Fig. 3 is a partially enlarged schematic view of the sealing device of the blower of the present invention.
In the figure: the boiler body 10, the burner 20, the combustion chamber 30, the heat exchanger 40, the smoke discharging device 50, the base frame 60, the base plate 1, the cover plate 2, the blades 3, the inlet ring 4, the first arc-shaped groove 41, the first guide blade 42, the return passage 43, the housing 5, the second arc-shaped groove 51, the second guide blade 52, the arc-shaped part 53, the inclined surface 54, and the airflow direction "→".
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 steam boiler system with a blowing mechanism, the steam boiler system comprises a boiler body 10, a burner 20, a combustion chamber 30, a heat exchanger 40, a smoke discharging device 50, a base frame 60, a blowing mechanism, 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 discharging 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 blowing mechanism is connected with the boiler body 10 through a pipeline, the pump mechanism and the valve assembly are connected with the boiler body 10 through a pipeline, the blowing mechanism is a blower, the blowing mechanism comprises an impeller and a shell 5, the impeller is arranged in the shell 5, the impeller comprises a chassis 1, a cover disc 2, a plurality of blades 3 and an inlet ring 4, the blades 3 are uniformly distributed along the circumferential direction and are connected between the chassis 1 and the cover disc 2, and the inlet ring 4 is arranged at the inlet of the cover disc 2, and the steam boiler system is characterized in that: the inlet ring 4 comprises a first arc-shaped groove 41 and first guide vanes 42, the corner of the inlet ring 4 is provided with the first arc-shaped groove 41, a plurality of first guide vanes 42 uniformly distributed along the circumferential direction are arranged in the first arc-shaped groove 41, the first guide vanes 42 rotate along with the impeller, a second arc-shaped groove 51 is arranged at the position of the shell 5 corresponding to the inlet ring 4, a plurality of second guide vanes 52 uniformly distributed along the circumferential direction are arranged in the second arc-shaped groove 51, and the second guide vanes 52 are fixed on the shell 5; the first arc-shaped groove 41 and the second arc-shaped groove 51 form a whole circular ring (except a sealing gap) on the circumference, the circle centers of the first arc-shaped groove 41 and the second arc-shaped groove 51 are basically the same, and a circular backflow cavity is formed between the first arc-shaped groove 41 and the second arc-shaped groove 51; one or more return channels 43 are provided in the inlet ring 4, one end of each return channel 43 being in communication with the flow path between two adjacent first guide vanes 42, and the other end being in communication with the impeller gap G between the cover disc 2 and the housing 5.
Further, the first guide vane 42 is an arc vane having an included angle/mounting angle with the axis of 15-25 °; the second guide vanes 52 are arcuate vanes having an included angle/mounting angle of- (15-25) deg. with the axis, i.e., opposite the included angle/mounting angle of the first guide vanes 42.
The first guide vane 42 and the second guide vane 52 are located in the fourth and second quadrants, respectively, in the circumferential direction.
According to the steam boiler system with the air blowing mechanism, when the air blower works, under the action of the first guide vane 42 and the second guide vane 52, leakage of air flow in the impeller gap G between the cover disc 2 of the impeller and the shell 5 along the sealing gap into the circular backflow cavity can be restrained/reduced; for the air flow which partially flows back into the circular backflow cavity, the air flow is guided to the backflow channel 43 under the action of the first guide vane 42 and the second guide vane 52 and is guided back to the impeller gap G through the backflow channel 43, so that the leakage of the air flow in the impeller gap G to the impeller inlet can be effectively restrained, the sealing performance is improved, the flow loss is reduced, and the overall efficiency of the blower is improved.
Further, an arc portion 53 is provided on a side of the second guide vane 52 close to the first guide vane 42, and the arc portion 53 coincides with the bending direction of the second arc groove 51.
An inclined surface 54 is provided on the housing 5 on the right side of the circular return chamber, and a sealing gap is formed between the inclined surface 54 and the outer peripheral surface of the inlet ring 4.
Further, the return passage 43 includes a horizontal section, an inclined section, which substantially coincides with (or is substantially parallel to) the inclination direction of the cover plate 2, and the passage sectional area of the return passage 43 gradually decreases from the circular return chamber end to the impeller gap G end, so that the air flow is guided back/to the impeller gap G through the return passage 43.
According to the steam boiler system with the air blowing mechanism, when the air blower works, under the action of the first guide vane 42 and the second guide vane 52, leakage of air flow in the impeller gap G between the cover disc 2 of the impeller and the shell 5 along the sealing gap into the circular backflow cavity can be restrained/reduced; for the air flow which partially flows back into the circular backflow cavity, the air flow is guided to the backflow channel 43 under the action of the first guide vane 42 and the second guide vane 52 and is guided back to the impeller gap G through the backflow channel 43, so that the leakage of the air flow in the impeller gap G to the impeller inlet can be effectively restrained, the sealing performance is improved, the flow loss is reduced, and the overall efficiency of the blower 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 (5)
1. The utility model provides a steam boiler system with blast mechanism, steam boiler system includes boiler body (10), combustor (20), combustion chamber (30), heat exchanger (40), fume extractor (50), bed frame (60), blast mechanism, pump mechanism, valve assembly, safety monitoring device, the one end of boiler body is provided with the combustor, the other end is provided with fume extractor, be provided with combustion chamber in the boiler body, heat exchanger, boiler body installs on the bed frame, blast mechanism is connected with the boiler body through the pipeline, pump mechanism, valve assembly is connected with the boiler body through the pipeline, blast mechanism is the air-blower, the air-blower includes impeller, casing (5), the impeller is installed in the casing, the impeller includes chassis (1), the cover dish (2), blade (3), import ring (4), a plurality of blades are along circumference evenly distributed and connect between chassis and the cover dish, the import department of cover dish has import ring, its characterized in that: the inlet ring (4) comprises a first arc-shaped groove (41) and first guide vanes (42), wherein a first arc-shaped groove is formed in the corner of the inlet ring, a plurality of first guide vanes uniformly distributed along the circumferential direction are arranged in the first arc-shaped groove, the first guide vanes rotate along with the impeller, a second arc-shaped groove (51) is formed in the position, corresponding to the inlet ring, of the shell, a plurality of second guide vanes (52) uniformly distributed along the circumferential direction are arranged in the second arc-shaped groove, and the second guide vanes are fixed on the shell; on the circumference, a first arc-shaped groove (41) and a second arc-shaped groove (51) form a whole circular ring, the circle centers of the first arc-shaped groove and the second arc-shaped groove are the same, and a circular backflow cavity is formed between the first arc-shaped groove and the second arc-shaped groove; one or more backflow channels (43) are arranged in the inlet ring, one ends of the backflow channels are communicated with the flow channel between two adjacent first guide vanes, the other ends of the backflow channels are communicated with the impeller gap G between the cover disc and the shell, an inclined surface (54) is arranged on the shell (5) and positioned on the right side of the circular backflow cavity, and a sealing gap is formed between the inclined surface and the outer peripheral surface of the inlet ring (4).
2. A steam boiler system with a blowing mechanism according to claim 1, characterized in that the first guide vane (42) is an arc-shaped vane having a mounting angle of 15-25 ° to the axis; the second guide vane (52) is an arc vane having a mounting angle of- (15-25 DEG) with the axis, i.e. opposite to the mounting angle of the first guide vane.
3. A steam boiler system with a blowing mechanism according to claim 2, characterized in that the first guide vane (42) and the second guide vane (52) are located in the fourth and the second quadrant, respectively, in the circumferential direction.
4. A steam boiler system with a blowing mechanism according to claim 3, characterized in that the side of the second guide vane (52) close to the first guide vane (42) is provided with an arc-shaped portion (53) which coincides with the bending direction of the second arc-shaped groove (51).
5. A steam boiler system with a blowing mechanism according to claim 1, characterized in that the return channel (43) comprises a horizontal section, an inclined section, which coincides with the inclination of the cover disc (2) or is parallel to the cover disc, the channel cross-sectional area of the return channel decreasing gradually from the circular return chamber end to the impeller gap G end, facilitating that the air flow is led back to the impeller gap G through the return channel (43).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210185042.1A CN114562716B (en) | 2022-02-28 | 2022-02-28 | Steam boiler system with air blowing mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210185042.1A CN114562716B (en) | 2022-02-28 | 2022-02-28 | Steam boiler system with air blowing mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114562716A CN114562716A (en) | 2022-05-31 |
| CN114562716B true CN114562716B (en) | 2023-06-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210185042.1A Active CN114562716B (en) | 2022-02-28 | 2022-02-28 | Steam boiler system with air blowing mechanism |
Country Status (1)
| Country | Link |
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| CN (1) | CN114562716B (en) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103062125B (en) * | 2013-02-20 | 2015-11-04 | 安徽安风风机有限公司 | A kind of centrifugal blower |
| CN203404122U (en) * | 2013-08-15 | 2014-01-22 | 长沙山水节能研究院有限公司 | Impeller ring sealing device of water pump and impeller ring used for impeller ring sealing device |
| CN204476871U (en) * | 2015-01-27 | 2015-07-15 | 浙江理工大学 | A kind of centrifugal blower slip ring adding anti-vortex ring |
| CN204476870U (en) * | 2015-01-27 | 2015-07-15 | 浙江理工大学 | A kind of centrifugal blower slip ring |
| JP6773492B2 (en) * | 2016-09-13 | 2020-10-21 | リンナイ株式会社 | Centrifugal fan |
| CN211422997U (en) * | 2019-11-21 | 2020-09-04 | 泛仕达机电股份有限公司 | Sealing structure for reducing gap leakage of inlet collector of centrifugal fan |
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2022
- 2022-02-28 CN CN202210185042.1A patent/CN114562716B/en active Active
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| Publication number | Publication date |
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| CN114562716A (en) | 2022-05-31 |
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