CN2382867Y - Low noise fan for transformer - Google Patents
Low noise fan for transformer Download PDFInfo
- Publication number
- CN2382867Y CN2382867Y CN 99228840 CN99228840U CN2382867Y CN 2382867 Y CN2382867 Y CN 2382867Y CN 99228840 CN99228840 CN 99228840 CN 99228840 U CN99228840 U CN 99228840U CN 2382867 Y CN2382867 Y CN 2382867Y
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- Prior art keywords
- blade
- motor
- angle
- wheel hub
- steel wire
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Abstract
The utility model relates to a low noise blower fan for transformers. Blades 3 are welded on a wheel hub 4 to form an impeller 5; the wheel hub 4 installed on the shaft extension of a shaft of a motor 7 through a shaft coupling 6; the motor 7 is installed on an installing plate 9; rotor grooves of the motor are in the shape of a specific open groove; the number of the grooves is 64. A guard net hood 10 adopts a steel wire net hood formed by that steel wires 8 with the diameters from 4 mm to 6 mm are combined with clearances of 16-30 mm, and the blades 3 adopt specific structural shapes with the characteristics of width and bigness, small relative bending amount, sweepforward, etc. The structure can lower the running noise of the blower fan and can also satisfy the needs of air cooling oil-filled transformers for the reformation of city nets.
Description
The utility model relates to a kind of transformer silent ventilator, belongs to the cooling unit of oil immersed transformer.
At present with the matching used cooling blower of transformer, impeller adopts the method for cast aluminium alloy or blade riveted joint mostly, and its shape and structure makes when turning round noise bigger; Rotor groove structure can make motor produce the high-frequency electrical magnetosonic when operation; Protective housing is the air duct structure, and noise is big, and the noise that brings during owing to the operation of the problems referred to above fan is big, generally up to 70dB, can not satisfy the requirement of urban network restructuring with transformer.
The purpose of this utility model provides a kind of transformer silent ventilator, and it can not only satisfy the needs of air-cooled oil immersed transformer cooling, and the noise can greatly reduce fan operation the time, can satisfy the requirement of urban network restructuring with transformer.
The technical solution of the utility model is: blade 3 is welded on forms impeller 5 on the wheel hub 4, wheel hub 4 is installed on the shaft extension of 7 in motor by coupling 6; Motor 7 is installed on the mounting plate 9.The rotor groove is an opening slot, and the groove number is 64, and slot opening 11 is 1.0mm, and notch high 12 is 0.5mm, and groove high 13 is 25.5mm, and bottom land wide 14 is 2.0mm, and groove top width 15 is 4.3mm, flute profile α
1Angle 16 is 30 °, the high-frequency electrical magnetosonic that this structure produces in the time of can eliminating the motor operation.Protection net 10 adopts the steel wire cover structure, its guard steel wire 8 diameters are Φ 4～Φ 6mm, distance between each adjacent two steel wire is 16～30mm, protection net 10 is welded to each other together and is fixed in mounting plate (9) by steel wire 8 and support 1 and angle iron flange 2 and goes up and form the tractive current sound when this net cover structure can reduce air inlet.The hub ratio of the impeller of being made up of 3～4 blades 3 and wheel hub 45 is 0.3～0.4, and blade is roomy, and its aspect ratio L/b is 0.75～0.95, the relative tortuosity of blade is little, and its tortuosity f/b is 0.04～0.07, and (L is the radial length of blade, b is a width of blade, and f is the amount of bow of blade).Blade is roomy, and tortuosity is little relatively, can make blade more smooth, and air-flow is turned back behind blade gently, reduces the separation that air-flow causes because of zig zag, and air-flow is turned back gently, and unit load diminishes on the blade, and the noise that produces when moving like this is just little.The blade sweepforward, blade centreline 17 is not orthogonal to axis 18, and the several angle that turns forward, its sweepforward angle θ are 55 °～65 °, and the established angle at average blade ring diameter place is 28 °～42 °.The blade sweepforward is suppressed the airflow breakaway of blade root effectively, has greatly reduced the turbulence noise of air-flow.
Owing to adopt such scheme, satisfied the needs of air-cooled oil immersed transformer cooling, the noise when greatly having reduced fan operation, this noise is lower than 60dB, satisfies the requirement of urban network restructuring with transformer.
The utility model is described in further detail below in conjunction with drawings and Examples:
Fig. 1 is the structural representation of the utility model silent ventilator;
Fig. 2 is the left view of Fig. 1;
Fig. 3 is a rotor groove flute profile schematic representation;
Fig. 4 is an aspect ratio L/b schematic representation;
Fig. 5 is the relative tortuosity f/b schematic representation of blade.
Fig. 6 is a blade sweepforward schematic representation
In the accompanying drawing, 1 support, 2 angle iron flanges, 3 blades, 4 wheel hubs, 5 impellers, 6 coupling, 7 motors, 8 steel wires, 9 mounting plates, 10 protection nets, 11 slot openings, 12 notch height, 13 groove height, 14 bottom lands are wide, 15 groove top widths, 16 flute profile α
1The angle, 17 blade centrelines, 18 axis.
Embodiment: blade 3 is welded on forms impeller 5 on the wheel hub 4, wheel hub 4 is connected in by coupling 6 on the shaft extension of motor 7, and motor 7 is installed on the mounting plate 9.The rotor groove is an opening slot, and the groove number is 64, and slot opening 11 is 1.0mm, and notch high 12 is 0.5mm, and groove high 13 is 25.5mm, and bottom land wide 14 is 2.0mm, and groove top width 15 is 4.3mm, flute profile α
1Angle 16 is 30 °.Protection net 10 be by steel wire 8 form columnar structured, its cylinder is a flat shape, form at the bottom of the cylinder and steel wire 8 diameters of circumference are 5mm, distance between each adjacent two steel wire is 20mm, and protection net 10 is welded together by each Round Steel Wire 8 and support 1 and angle iron flange 2 and is fixed in mounting plate (9) to be gone up and constitute.The hub ratio of the impeller of being made up of blade 3 and wheel hub 45 is 0.35, roomy its aspect ratio of blade L/b is 0.8, and the relative tortuosity of blade is little, and its tortuosity f/b is 0.05, (L is the radial length of blade, b is a width of blade, and f is the amount of bow of blade), the blade sweepforward, blade centreline 17 is not orthogonal to axis 18, the several angle that turns forward, its sweepforward angle θ is 60 °, the established angle at average blade ring diameter place is 29 °.
Claims (4)
1. a transformer silent ventilator is welded on the impeller of forming on the wheel hub (4) (5) by blade (3), and motor (7) and protection net (10) are formed, and it is characterized in that: motor (7) rotor is made up of 64 opening slots; The steel wire (8) that protection net (10) adopts specific thickness is welded to each other together and is fixed in mounting plate (9) with certain span and support (1) and angle iron flange (2) and goes up and form; Impeller (5) adopts specific hub ratio, adopts the blade (3) of roomy, little tortuosity and sweepforward.
2. silent ventilator according to claim 1 is characterized in that: motor (7) rotor slot opening (11) is 1.0mm, and notch height (12) is 0.5mm, and groove height (13) is 25.5mm, and bottom land wide (14) is 2.0mm, and groove top width (15) is 4.3mm, flute profile α
1Angle (16) is 30 °.
3. silent ventilator according to claim 1 is characterized in that: steel wire (8) diameter of protection net (10) is Φ 4～Φ 6mm, and the distance between each adjacent two steel wire (8) is 16～30mm.
4. silent ventilator according to claim 1 is characterized in that: be welded on by 3～4 blades (3) and form wheel hub (4) on the wheel hub (4), its hub ratio is 0.3～0.4, and the aspect ratio L/b of roomy blade is 0.75～0.95; The tortuosity f/b of little tortuosity blade is 0.04～0.07, and L is the radial length of blade (3), and b is the width of blade, and f is the amount of bow of blade; The blade centreline of sweepforward blade (17) is not orthogonal to axis (18), certain angle that turns forward, and its sweepforward angle θ is 55 °～65 °, the established angle at average blade ring diameter place is 28 °～42 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99228840 CN2382867Y (en) | 1999-07-05 | 1999-07-05 | Low noise fan for transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99228840 CN2382867Y (en) | 1999-07-05 | 1999-07-05 | Low noise fan for transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2382867Y true CN2382867Y (en) | 2000-06-14 |
Family
ID=34018154
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99228840 Expired - Fee Related CN2382867Y (en) | 1999-07-05 | 1999-07-05 | Low noise fan for transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2382867Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052351A (en) * | 2010-12-23 | 2011-05-11 | 西北工业大学 | Axial-flow type fan drum with blade protecting plate |
| CN105351249A (en) * | 2015-11-27 | 2016-02-24 | 湖南中通电气股份有限公司 | Fan propeller for silicone element heat dissipation of electric locomotive |
| CN107339245A (en) * | 2017-07-31 | 2017-11-10 | 广东美的环境电器制造有限公司 | Fan |
| CN108167222A (en) * | 2017-12-06 | 2018-06-15 | 九阳股份有限公司 | A kind of cooking apparatus quiet fan |
-
1999
- 1999-07-05 CN CN 99228840 patent/CN2382867Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102052351A (en) * | 2010-12-23 | 2011-05-11 | 西北工业大学 | Axial-flow type fan drum with blade protecting plate |
| CN105351249A (en) * | 2015-11-27 | 2016-02-24 | 湖南中通电气股份有限公司 | Fan propeller for silicone element heat dissipation of electric locomotive |
| CN107339245A (en) * | 2017-07-31 | 2017-11-10 | 广东美的环境电器制造有限公司 | Fan |
| CN107339245B (en) * | 2017-07-31 | 2019-08-23 | 广东美的环境电器制造有限公司 | Fan |
| CN108167222A (en) * | 2017-12-06 | 2018-06-15 | 九阳股份有限公司 | A kind of cooking apparatus quiet fan |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |