CN115076137A - High-efficiency low-noise centrifugal fan for offshore wind power cooling system - Google Patents
High-efficiency low-noise centrifugal fan for offshore wind power cooling system Download PDFInfo
- Publication number
- CN115076137A CN115076137A CN202210846161.7A CN202210846161A CN115076137A CN 115076137 A CN115076137 A CN 115076137A CN 202210846161 A CN202210846161 A CN 202210846161A CN 115076137 A CN115076137 A CN 115076137A
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- Prior art keywords
- air inlet
- centrifugal fan
- inlet pipeline
- impeller
- cooling system
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- 238000001816 cooling Methods 0.000 title claims abstract description 18
- 238000005192 partition Methods 0.000 claims description 4
- 230000003068 static effect Effects 0.000 abstract description 13
- 238000009423 ventilation Methods 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 3
- 238000011056 performance test Methods 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000004088 simulation Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
Images
Classifications
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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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/08—Units comprising pumps and their driving means the working fluid being air, e.g. for ventilation
-
- 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
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
-
- 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
- F04D29/4206—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/4213—Casings; Connections of working fluid for radial or helico-centrifugal pumps especially adapted for elastic fluid pumps suction ports
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2250/00—Geometry
- F05D2250/50—Inlet or outlet
- F05D2250/51—Inlet
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention aims to provide a high-efficiency low-noise centrifugal fan for an offshore wind power cooling system, belonging to key equipment for an offshore wind power ventilation cooling system. The air inlet device comprises an air inlet pipeline, a connecting flange and an air inlet throat part; the inlet end of the inlet pipeline extends out of the shell of the centrifugal fan, the outlet end of the inlet pipeline is connected with the impeller through the throat part of the air inlet, and the inlet pipeline is connected with the shell through a connecting flange; the cross section of the throat part of the air inlet is arc-shaped and is tangent to the front disk profile line of the centrifugal fan impeller. The fan static pressure of the invention is improved, the static pressure and efficiency curve are stable, the high-efficiency area range is widened, the use range of the fan is enlarged, the operation is more balanced, the efficiency is not easy to exceed, and the fan static pressure adjusting device has the advantages of simple structure, small size and light weight.
Description
Technical Field
The invention relates to a centrifugal fan, in particular to a high-efficiency low-noise centrifugal fan for an offshore wind power cooling system, and belongs to the technical field of fans.
Background
The centrifugal fan is used as key equipment of an offshore wind power cooling system, the running stability of the centrifugal fan is critical to the whole cooling system, and the overall performance of the system is influenced by the performances of noise, efficiency, vibration and the like of the fan. Generally, the optimal position relation between the air duct interface of the cooling system and the air inlet of the fan is coaxial and equal in diameter. In the practical engineering application of the fan, the air duct interface and the air inlet of the fan are in various spatial positions, the most common scheme is that the air duct interface is connected to an air inlet box, the air inlet box is installed on a machine shell, the air inlet is formed in the outlet face of the air inlet box, and the air inlet is also installed on the machine shell. As shown in fig. 1, the outlet end is fixed with the intake section 9 of the impeller and cannot be changed; the air inlet device consists of an air inlet pipeline 2, an air inlet box 3, an air inlet box flange 4 and an air inlet 5. The scheme can form a flow channel using a medium, but surge often occurs during use or performance test, normal operation cannot be achieved, or the fan is low in efficiency, high in noise, excessive in vibration, excessive in efficiency, overheated in a motor and the like. The fan provided with the conventional air inlet device has surging during performance test, and the performance test cannot be carried out.
Disclosure of Invention
Aiming at the defects of the technology, the invention aims to provide a high-efficiency low-noise centrifugal fan for an offshore wind power cooling system.
In order to achieve the purpose, the invention is realized by the following technical scheme:
a centrifugal fan comprises a motor, an impeller, a casing and an air inlet device, wherein the air inlet device comprises an air inlet pipeline, a connecting flange and an air inlet throat;
the inlet end of the inlet pipeline extends out of the shell of the centrifugal fan, the outlet end of the inlet pipeline is connected with the impeller through the throat part of the air inlet, and the inlet pipeline is connected with the shell through a connecting flange;
the cross section of the throat part of the air inlet is arc-shaped and is tangent to the front disk profile line of the centrifugal fan impeller.
On above-mentioned marine wind power cooling system uses high-efficient low noise centrifugal fan basis, the inside baffle that extends along air inlet pipeline length direction of air inlet pipeline, left side chamber and right chamber are separated into with air inlet pipeline to the baffle.
On the basis of the high-efficiency low-noise centrifugal fan for the offshore wind power cooling system, the air inlet pipeline is divided into a left part and a right part corresponding to the connecting flange, one part is arranged on the outer side of the side plate of the casing, and the other part is arranged on the inner side of the casing.
In order to achieve the purpose, the invention is realized by the following another technical scheme:
a high-efficiency low-noise centrifugal fan for an offshore wind power cooling system comprises a motor, an impeller, a shell and an air inlet device, wherein the air inlet device comprises an air inlet pipeline, an air inlet box, a connecting flange and an air inlet;
the inlet end of the air inlet pipeline extends outside the air inlet box, the outlet end of the air inlet pipeline is connected with one end of the air inlet box, the other end of the air inlet box is connected with the impeller through the air inlet, and the air inlet box is connected with the shell through the connecting flange;
the air inlet includes horn portion and air inlet throat, and horn portion is close to inlet box one end diameter and is greater than the one end diameter of being close to the air inlet throat, and air inlet throat cross-sectional shape is the arc, and tangent with centrifugal fan impeller front plate type line.
On above-mentioned marine wind power cooling system is with high-efficient low noise centrifugal fan basis, the inlet box includes the inlet box top and the tank wall that admits air, and the inlet box top is the arcwall face, and this arcwall face molded lines are tangent with the inlet line molded lines, and the tank wall that admits air is the face of cylinder, and the diameter equals with the air intake air inlet diameter.
The invention has the advantages that:
the invention changes the appearance of the over-intake device, adjusts the over-flow area curve of the intake part, improves the airflow distribution of the airflow at the intake device and the impeller inlet, meets the requirements of design points, improves the static pressure of the fan, has stable static pressure and efficiency curve, widens the range of the high-efficiency area, enlarges the use range of the fan, has more balanced operation and less possibility of exceeding the effect, and has simple structure, small size and light weight.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention.
Fig. 1 is a schematic structural diagram of a conventional centrifugal fan.
Fig. 2 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 3 is a schematic structural view of an intake pipe in embodiment 1 of the present invention.
Fig. 4 is a schematic structural diagram of embodiment 2 of the present invention.
FIG. 5 is a graph of the static pressure of a conventional fan versus the static pressure of example 1 of the present invention.
FIG. 6 is a graph of the efficiency of a conventional fan versus the efficiency of embodiment 1 of the present invention.
FIG. 7 is a graph of the static pressure of a conventional fan versus the static pressure of example 2 of the present invention.
FIG. 8 is a graph of the efficiency of a conventional fan versus the efficiency of example 2 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1
Referring to fig. 2, the centrifugal fan comprises a motor 8, an impeller 6, a casing 7, and an air inlet device, wherein the air inlet device comprises an air inlet pipeline 2, a connecting flange 4 and an air inlet throat portion.
The air inlet pipelines 2 are equal-diameter elbows, the flow passing areas are equal, the energy loss is small when air flows pass through, and the air flows are orderly.
The inlet end 1 of the air inlet pipeline 2 extends outside the centrifugal fan casing 7, the outlet end of the air inlet pipeline 2 is connected with the impeller 6 through the throat part of the air inlet, and the air inlet pipeline 2 is connected with the casing 7 through the connecting flange 4.
The cross section of the throat part of the air inlet is arc-shaped and is tangent to the front disk type line of the centrifugal fan impeller 6, the overflowing area is firstly contracted and then expanded, the direction of the flowing of the gas at the impeller inlet is guided in advance, and the turning of the gas flow in the impeller is facilitated.
Referring to fig. 3, a partition 10 extending along the length direction of the intake pipe 2 is provided inside the intake pipe 2, and the partition divides the intake pipe 2 into a left chamber and a right chamber to prevent the air flow from concentrating toward one side at a turn; the air inlet pipeline 2 is divided into a left part and a right part corresponding to the connecting flange 4, one part is arranged on the outer side of the side plate of the casing 7, and the other part is arranged on the inner side of the casing 7, so that the lap joint of the air inlet and the impeller 6 can be conveniently adjusted.
This embodiment is through changing the air inlet unit appearance, and the adjustment position of admitting air overflows the area curve, has improved the air current distribution of air current in air inlet unit and impeller import department, and the simulation calculation with original impeller and casing cooperation reachs: at the design flow point of the fan, the static fan pressure Pst is increased by 460Pa as shown in FIG. 5, and the efficiency eta is increased by 19.6 percent as shown in FIG. 6. The scheme of the invention is obviously superior to the design scheme of the common fan, meets the requirements of design points, has stable static pressure and efficiency curves, widens the range of a high-efficiency area, enlarges the use range of the fan, has more balanced operation and less possibility of exceeding the effect, and has simple structure, small size and light weight.
Example 2
Referring to fig. 4, a centrifugal fan includes a motor 8, an impeller 6, a casing 7, and an air inlet device, where the air inlet device includes an air inlet pipeline 2, an air inlet box 3, a connecting flange 4, and an air inlet;
the inlet end 1 of the air inlet pipeline 2 extends outside the air inlet box 3, the outlet end of the air inlet pipeline 2 is connected with one end of the air inlet box 3, the other end of the air inlet box 3 is connected with an impeller 6 through an air inlet, and the air inlet box 3 is connected with a shell 7 through a connecting flange 4;
the air inlet includes trumpet portion and air inlet throat (51), and the one end diameter that the trumpet portion is close to 3 of inlet box is greater than the one end diameter that is close to 51 of air inlet throat, and 51 cross sectional shape of air inlet throat is the arc, and tangent with 6 front deck molding lines of centrifugal fan impeller.
The air inlet box 3 comprises an air inlet box top 3-1 and an air inlet box wall 3-2, the air inlet box top 3-1 is an arc-shaped surface, the molded line of the arc-shaped surface is tangent to the molded line of the air inlet pipeline 2, the air flow is convenient to turn at the position, the air inlet box wall 3-2 is a cylindrical surface, the diameter of the cylindrical surface is equal to the air inlet diameter of the air inlet 5, and loss caused by area change is reduced.
Through changing air inlet box size and appearance, the adjustment position area curve that flows that admits air has improved the air current distribution of air current at air inlet unit and impeller import department, cooperates the simulation calculation with original impeller and casing and derives: at the working point of the fan, the static pressure of the fan is improved by 390Pa as shown in figure 7, and the efficiency is improved by 15.4 percent as shown in figure 8. The fan static pressure curve and the efficiency curve are stable, the high-efficiency area is widened, and the scheme has the advantages of simple structure, small size, light weight, convenience in modification and short production period.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides an offshore wind power is high-efficient low noise centrifugal fan for cooling system, includes motor (8), impeller (6) and casing (7), its characterized in that: the air inlet device comprises an air inlet pipeline (2), a connecting flange (4) and an air inlet throat part (51);
the air inlet pipeline (2) is an equal-diameter elbow, the inlet end (1) of the air inlet pipeline (2) extends out of the centrifugal fan casing (7), the outlet end of the air inlet pipeline (2) is connected with the impeller (6) through the air inlet throat part (51), and the air inlet pipeline (2) is connected with the casing (7) through the connecting flange (4);
the section of the throat part (51) of the air inlet is arc-shaped and tangent to the front disk line of the centrifugal fan impeller (6).
2. The offshore wind power cooling system high-efficiency low-noise centrifugal fan as set forth in claim 1, wherein: the air inlet pipeline (2) is internally provided with a partition plate (10) extending along the length direction of the air inlet pipeline (2), and the air inlet pipeline (2) is divided into a left cavity and a right cavity by the partition plate.
3. The offshore wind power cooling system high-efficiency low-noise centrifugal fan as set forth in claim 1, wherein: the air inlet pipeline (2) is divided into a left part and a right part corresponding to the connecting flange (4), one part is arranged on the outer side of the side plate of the machine shell (7), and the other part is arranged on the inner side of the machine shell (7).
4. The utility model provides an offshore wind power is high-efficient low noise centrifugal fan for cooling system, includes motor (8), impeller (6) and casing (7), its characterized in that: the air inlet device comprises an air inlet pipeline (2), an air inlet box (3), a connecting flange (4) and an air inlet;
the inlet end (1) of the air inlet pipeline (2) extends outside the air inlet box (3), the outlet end of the air inlet pipeline (2) is connected with one end of the air inlet box (3), the other end of the air inlet box (3) is connected with an impeller (6) through an air inlet, and the air inlet box (3) is connected with a shell (7) through a connecting flange (4);
the air intake includes horn portion and air intake throat (51), and horn portion is close to inlet box (3) one end diameter and is greater than and is close to air intake throat (51) one end diameter, and air intake throat (51) cross-sectional shape is the arc, and tangent with centrifugal fan impeller (6) front plate type line.
5. The offshore wind power cooling system high-efficiency low-noise centrifugal fan as set forth in claim 4, wherein: the air inlet box (3) comprises an air inlet box top (3-1) and an air inlet box wall (3-2), the air inlet box top (3-1) is an arc-shaped surface, the molded line of the arc-shaped surface is tangent to the molded line of the air inlet pipeline (2), the air inlet box wall (3-2) is a cylindrical surface, and the diameter of the air inlet box wall is equal to the air inlet diameter of the air inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210846161.7A CN115076137A (en) | 2022-07-19 | 2022-07-19 | High-efficiency low-noise centrifugal fan for offshore wind power cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210846161.7A CN115076137A (en) | 2022-07-19 | 2022-07-19 | High-efficiency low-noise centrifugal fan for offshore wind power cooling system |
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| Publication Number | Publication Date |
|---|---|
| CN115076137A true CN115076137A (en) | 2022-09-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210846161.7A Pending CN115076137A (en) | 2022-07-19 | 2022-07-19 | High-efficiency low-noise centrifugal fan for offshore wind power cooling system |
Country Status (1)
| Country | Link |
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| CN (1) | CN115076137A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0547535A1 (en) * | 1991-12-14 | 1993-06-23 | Alcatel SEL Aktiengesellschaft | Radial fan for the delivery of a combustible gas mixture |
| CN104169588A (en) * | 2012-02-29 | 2014-11-26 | 三菱重工业株式会社 | Air intake pipe structure for centrifugal fluid machine |
| CN104653496A (en) * | 2015-01-27 | 2015-05-27 | 浙江理工大学 | Single-double-suction adjustable centrifugal ventilator |
| CN104903593A (en) * | 2013-02-21 | 2015-09-09 | 三菱重工业株式会社 | Fluid machine and fluid machine system equipped with same |
| CN110418899A (en) * | 2017-03-27 | 2019-11-05 | 三菱重工制冷空调系统株式会社 | Compressor sucking piping, compression unit and refrigeration machine |
| CN111075768A (en) * | 2019-12-20 | 2020-04-28 | 中国北方发动机研究所(天津) | Centrifugal compressor volute with auxiliary noise reduction structure |
| CN212615440U (en) * | 2020-07-24 | 2021-02-26 | 浙江汇明激光科技有限公司 | Air inlet box based on air blower |
| CN114738306A (en) * | 2022-05-07 | 2022-07-12 | 上海宝钢节能环保技术有限公司 | Efficient combustion-supporting fan applied to rotary hearth furnace process |
-
2022
- 2022-07-19 CN CN202210846161.7A patent/CN115076137A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0547535A1 (en) * | 1991-12-14 | 1993-06-23 | Alcatel SEL Aktiengesellschaft | Radial fan for the delivery of a combustible gas mixture |
| CN104169588A (en) * | 2012-02-29 | 2014-11-26 | 三菱重工业株式会社 | Air intake pipe structure for centrifugal fluid machine |
| CN104903593A (en) * | 2013-02-21 | 2015-09-09 | 三菱重工业株式会社 | Fluid machine and fluid machine system equipped with same |
| CN104653496A (en) * | 2015-01-27 | 2015-05-27 | 浙江理工大学 | Single-double-suction adjustable centrifugal ventilator |
| CN110418899A (en) * | 2017-03-27 | 2019-11-05 | 三菱重工制冷空调系统株式会社 | Compressor sucking piping, compression unit and refrigeration machine |
| CN111075768A (en) * | 2019-12-20 | 2020-04-28 | 中国北方发动机研究所(天津) | Centrifugal compressor volute with auxiliary noise reduction structure |
| CN212615440U (en) * | 2020-07-24 | 2021-02-26 | 浙江汇明激光科技有限公司 | Air inlet box based on air blower |
| CN114738306A (en) * | 2022-05-07 | 2022-07-12 | 上海宝钢节能环保技术有限公司 | Efficient combustion-supporting fan applied to rotary hearth furnace process |
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