CN114962286A - Cross flow cooling fan for dry type transformer - Google Patents
Cross flow cooling fan for dry type transformer Download PDFInfo
- Publication number
- CN114962286A CN114962286A CN202210671787.9A CN202210671787A CN114962286A CN 114962286 A CN114962286 A CN 114962286A CN 202210671787 A CN202210671787 A CN 202210671787A CN 114962286 A CN114962286 A CN 114962286A
- Authority
- CN
- China
- Prior art keywords
- blade
- axial
- midpoint
- concave
- cooling fan
- 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.)
- Granted
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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
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/02—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal
- F04D17/04—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps having non-centrifugal stages, e.g. centripetal of transverse-flow type
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/281—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps for fans or blowers
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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
- F04D29/26—Rotors specially for elastic fluids
- F04D29/28—Rotors specially for elastic fluids for centrifugal or helico-centrifugal pumps for radial-flow or helico-centrifugal pumps
- F04D29/30—Vanes
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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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/663—Sound attenuation
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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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/666—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by means of rotor construction or layout, e.g. unequal distribution of blades or vanes
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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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/667—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps by influencing the flow pattern, e.g. suppression of turbulence
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/08—Cooling; Ventilating
Abstract
The invention discloses a cross flow cooling fan for a dry type transformer, which comprises blades (1) and a web (2), wherein the blades are arc-shaped or wing-shaped, and the cross flow cooling fan is characterized in that: the first airfoil camber line R1 at one axial end of the blade is provided with a first midpoint, the second airfoil camber line R2 at the other axial end of the blade is provided with a second midpoint, a connecting line of the first midpoint and the second midpoint forms a blade middle line X-X, the blade middle line is approximately parallel to the axis of the cross-flow impeller, a plurality of concave parts (5) are arranged on the concave camber surface of the blade in an array mode along the blade middle line X-X, and the volume, the length and/or the width of the concave parts (5) are gradually increased from one axial end to the other axial end of the blade, and the concave parts are in an ellipse-like shape. According to the invention, through the design of the concave part and the guide groove on the surface of the blade, the vortex of the boundary layer on the surface of the blade can be effectively inhibited, so that the noise of the cross flow cooling fan can be reduced.
Description
Technical Field
The invention relates to the technical field of cooling devices of dry-type transformers, in particular to a cross-flow cooling fan for a dry-type transformer.
Background
For a dry-type transformer, a cross flow cooling fan is often adopted to cool the transformer, and the existing cross flow cooling fan for the dry-type transformer comprises a cross flow impeller and a shell, wherein the cross flow impeller comprises blades and webs, the webs are arranged at intervals along the axial direction, the blades are arranged between the adjacent webs, the blades are distributed along the circumferential direction of the webs, and the blades are arc-shaped or wing-shaped. However, the conventional cross flow cooling fan has the problem of high noise.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a cross-flow cooling fan for a dry-type transformer, which can effectively inhibit the boundary layer eddy of the surface of a blade through the design of a sunken part and a guide groove on the surface of the blade, thereby reducing the noise of the cross-flow cooling fan.
In order to achieve the purpose, the invention adopts the technical scheme that:
the utility model provides a crossing current cooling blower for dry-type transformer, its includes crossing current impeller, casing, and crossing current impeller includes blade (1), web (2), and a plurality of webs set up along axial interval, installs the blade between the adjacent web, and a plurality of blades distribute along the circumference of web, and the blade is arc or wing, and the blade has radial inner end (3) and radial outer end (4), and the blade has relative concave arc face and convex arc face, its characterized in that: the first airfoil mean camber line (R1) of the axial one end of the blade (1) is provided with a first midpoint, the second airfoil mean camber line (R2) of the axial other end of the blade is provided with a second midpoint, a connecting line of the first midpoint and the second midpoint forms a blade middle line (X-X), the blade middle line is approximately parallel to the axis of the cross flow impeller, a plurality of concave parts (5) are arranged on the concave cambered surface of the blade, the concave parts are arranged in an array along the blade middle line (X-X), the volume, the length and/or the width of the concave parts (5) are gradually increased from the axial one end to the axial other end of the blade, and the concave parts (5) are in an ellipse-like shape or an ellipse-like shape
And (4) shaping.
Further, the volume, axial length and radial width of the plurality of recesses (5) gradually increase from one axial end to the other axial end of the blade (1).
Further, the concave parts (5) are symmetrically arranged about a blade middle line (X-X), the deepest position points of the concave parts are located at the middle points of the concave parts, and the depths of the concave parts (5) are gradually increased from the edges to the middle points.
Furthermore, a plurality of guide grooves (6) are arranged on the concave cambered surface of the blade (1), the guide grooves extend along the radial direction, the guide grooves are arranged in an array manner along the axial direction, and the guide grooves (6) are arranged between the blade middle line (X-X) and the radial inner end (3).
Furthermore, a connecting part (51) is arranged between the adjacent concave parts (5), the connecting part is not provided with depth in general, the positions of the plurality of diversion trenches (6) correspond to the positions of the plurality of connecting parts (51) in the axial direction, one ends of the diversion trenches are arranged adjacent to the connecting part, and the other ends of the diversion trenches are arranged adjacent to the radial inner end (3).
Further, it is characterized in that the volumes and axial widths of the plurality of guide grooves (6) are gradually increased from one axial end to the other axial end of the blade (1).
According to the cross flow cooling fan for the dry type transformer, due to the design of the sunken part and the diversion trench on the surface of the blade, the vortex of the boundary layer on the surface of the blade can be effectively inhibited, and the noise of the cross flow cooling fan can be reduced.
Drawings
FIG. 1 is a schematic view of a cross-flow cooling fan for a dry-type transformer according to the present invention;
FIG. 2 is a schematic view of a blade structure of a cross-flow cooling fan for a dry type transformer according to the present invention;
fig. 3 is a schematic view of a blade structure of a cross-flow cooling fan for a dry type transformer according to the present invention.
In the figure: the radial flow guide vane comprises a vane 1, a web 2, a radial inner end 3, a radial outer end 4, a concave part 5, a guide groove 6, a connecting part 51, an airfoil profile middle arc line R and a vane middle line X-X.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1-3, a crossflow cooling blower for a dry-type transformer comprises a crossflow impeller and a casing, wherein the crossflow impeller comprises blades 1 and webs 2, the webs 2 are axially arranged at intervals, the blades 1 are arranged between the adjacent webs 2, the blades 1 are circumferentially distributed along the webs 2, the blades 1 are arc-shaped or wing-shaped, the blades 1 have a radial inner end 3 and a radial outer end 4, and the blades 1 have opposite concave arc surfaces and convex arc surfaces, and the crossflow cooling blower is characterized in that: the first airfoil mean camber line R1 of one axial end of the blade 1 is provided with a first midpoint, the second airfoil mean camber line R2 of the other axial end of the blade 1 is provided with a second midpoint, a connecting line of the first midpoint and the second midpoint forms a blade middle line X-X, the blade middle line X-X is approximately parallel to the axis of the cross flow impeller, a plurality of concave parts 5 are arranged on the concave cambered surface of the blade 1, the concave parts 5 are arranged in an array mode along the blade middle line X-X, the volume, the length and/or the width of the concave parts 5 are gradually increased from one axial end to the other axial end of the blade 1, and the concave parts 5 are in an ellipse-like shape or in an ellipse-like shape
And (4) shaping.
Further, the volume, axial length, and radial width of the plurality of recesses 5 gradually increase from one axial end to the other axial end of the vane 1.
Further, the recessed portion 5 is symmetrically arranged about the blade middle line X-X, and the deepest position point of the recessed portion 5 is located at a middle point of the recessed portion 5, and the depth of the recessed portion 5 gradually increases from the edge thereof to the middle point.
According to the crossflow cooling fan for the dry-type transformer, the design of the concave part 5 on the surface of the blade 1 can inhibit the boundary layer eddy of the surface of the blade, so that the noise of the crossflow cooling fan can be reduced.
Furthermore, a plurality of guide grooves 6 are arranged on the concave cambered surface of the blade 1, the guide grooves 6 extend along the radial direction, the guide grooves 6 are arranged in an array manner along the axial direction, and the guide grooves 6 are arranged between the blade middle line X-X and the radial inner end 3.
Further, there is a connecting portion 51 between adjacent recesses 5, the connecting portion 51 has substantially no depth, the plurality of guide grooves 6 are disposed at positions corresponding to the plurality of connecting portions 51 in the axial direction, and one end of each guide groove 6 is disposed adjacent to the connecting portion 51 and the other end is disposed adjacent to the radially inner end 3.
Further, the volume and axial width of the plurality of guide grooves 6 gradually increase from one axial end to the other axial end of the blade 1.
According to the crossflow cooling fan for the dry-type transformer, the design of the guide grooves 6 on the surface of the blade 1 is matched with the action of the concave part 5, so that the boundary layer eddy current on the surface of the blade can be further inhibited, and the noise of the crossflow cooling fan can be further reduced.
According to the crossflow cooling fan for the dry-type transformer, the design of the sunken part 5 and the diversion trench 6 on the surface of the blade can effectively inhibit the boundary layer eddy of the surface of the blade, so that the noise of the crossflow cooling fan can be reduced.
The above-described embodiments are illustrative of the present invention and not restrictive, it being understood that various changes, modifications, substitutions and alterations can be made herein without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.
Claims (6)
1. The utility model provides a crossing current cooling blower for dry-type transformer, its includes crossing current impeller, casing, and crossing current impeller includes blade (1), web (2), and a plurality of webs set up along axial interval, installs the blade between the adjacent web, and a plurality of blades distribute along the circumference of web, and the blade is arc or wing, and the blade has radial inner end (3) and radial outer end (4), and the blade has relative concave arc face and convex arc face, its characterized in that: the first airfoil mean camber line (R1) of the axial one end of the blade (1) is provided with a first midpoint, the second airfoil mean camber line (R2) of the axial other end of the blade is provided with a second midpoint, a connecting line of the first midpoint and the second midpoint forms a blade middle line (X-X), the blade middle line is approximately parallel to the axis of the cross flow impeller, a plurality of concave parts (5) are arranged on the concave cambered surface of the blade in an array mode along the blade middle line (X-X), the size, the length and/or the width of the plurality of concave parts (5) are gradually increased from the axial one end to the axial other end of the blade, and the concave parts (5) are in an ellipse-like shape.
2. A crossflow cooling blower for a dry transformer according to claim 1, characterised in that the volume, axial length and radial width of the plurality of recesses (5) gradually increase from one axial end to the other axial end of the blade (1).
3. A crossflow cooling blower for a dry transformer according to claim 2, characterised in that the recesses (5) are symmetrically arranged about the blade mid-line (X-X) with the deepest point of the recess at the mid-point of the recess, the depth of the recess (5) increasing from its edge to the mid-point.
4. A cross-flow cooling fan for a dry transformer according to claim 1 or 3, wherein a plurality of guiding grooves (6) are provided on the concave arc surface of the blade (1), the guiding grooves extend in a radial direction, and the guiding grooves are arranged in an array in an axial direction, and the guiding grooves (6) are provided between the blade middle line (X-X) and the radial inner end (3).
5. A crossflow cooling blower for a dry transformer according to claim 4 characterised in that between adjacent recesses (5) there are connections (51) having substantially no depth, in the axial direction a plurality of channels (6) are provided at positions corresponding to the positions of the plurality of connections (51), and in that one end of the channels is provided adjacent the connections and the other end is provided adjacent the radially inner end (3).
6. A crossflow cooling blower for a dry transformer in accordance with claim 5 characterised in that the volume and axial width of the plurality of channels (6) are increased gradually from one axial end to the other axial end of the blade (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210671787.9A CN114962286B (en) | 2022-06-14 | 2022-06-14 | Cross flow cooling fan for dry type transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210671787.9A CN114962286B (en) | 2022-06-14 | 2022-06-14 | Cross flow cooling fan for dry type transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114962286A true CN114962286A (en) | 2022-08-30 |
| CN114962286B CN114962286B (en) | 2023-05-26 |
Family
ID=82972337
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210671787.9A Active CN114962286B (en) | 2022-06-14 | 2022-06-14 | Cross flow cooling fan for dry type transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114962286B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102162464A (en) * | 2011-05-05 | 2011-08-24 | 广东志高空调有限公司 | Cross flow wind wheel of sawtooth-type vanes with pits |
| CN102297155A (en) * | 2010-06-28 | 2011-12-28 | 夏普株式会社 | Fan, casting die and fluid delivery device |
| JP2014088819A (en) * | 2012-10-30 | 2014-05-15 | Mitsubishi Electric Corp | Crossflow fan |
| CN105570190A (en) * | 2015-12-16 | 2016-05-11 | 重庆圣锦汽车配件有限公司 | Novel cross-flow fan blade |
| CN205277911U (en) * | 2016-01-18 | 2016-06-01 | 四川圣锦风机有限公司 | High strength low noise centrifugation fan blade |
| CN107489643A (en) * | 2017-10-17 | 2017-12-19 | 美佳德科技（无锡）有限公司 | Vortex pump impeller |
| CN212717263U (en) * | 2020-06-08 | 2021-03-16 | 江西昊仁电力设备有限公司 | Fan with impeller front disc capable of radially jumping and being adjusted according to requirements |
-
2022
- 2022-06-14 CN CN202210671787.9A patent/CN114962286B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102297155A (en) * | 2010-06-28 | 2011-12-28 | 夏普株式会社 | Fan, casting die and fluid delivery device |
| US20130101408A1 (en) * | 2010-06-28 | 2013-04-25 | Yukishige Shiraichi | Fan, molding die, and fluid feeder |
| CN102162464A (en) * | 2011-05-05 | 2011-08-24 | 广东志高空调有限公司 | Cross flow wind wheel of sawtooth-type vanes with pits |
| JP2014088819A (en) * | 2012-10-30 | 2014-05-15 | Mitsubishi Electric Corp | Crossflow fan |
| CN105570190A (en) * | 2015-12-16 | 2016-05-11 | 重庆圣锦汽车配件有限公司 | Novel cross-flow fan blade |
| CN205277911U (en) * | 2016-01-18 | 2016-06-01 | 四川圣锦风机有限公司 | High strength low noise centrifugation fan blade |
| CN107489643A (en) * | 2017-10-17 | 2017-12-19 | 美佳德科技（无锡）有限公司 | Vortex pump impeller |
| CN212717263U (en) * | 2020-06-08 | 2021-03-16 | 江西昊仁电力设备有限公司 | Fan with impeller front disc capable of radially jumping and being adjusted according to requirements |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114962286B (en) | 2023-05-26 |
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