CN203570673U - Bidirectional diffusion centrifugal fan - Google Patents
Bidirectional diffusion centrifugal fan Download PDFInfo
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- CN203570673U CN203570673U CN201320654802.5U CN201320654802U CN203570673U CN 203570673 U CN203570673 U CN 203570673U CN 201320654802 U CN201320654802 U CN 201320654802U CN 203570673 U CN203570673 U CN 203570673U
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- 238000009792 diffusion process Methods 0.000 title claims abstract description 31
- 230000002457 bidirectional effect Effects 0.000 title abstract description 5
- 241000237858 Gastropoda Species 0.000 claims description 17
- 239000002131 composite material Substances 0.000 claims description 3
- 238000009434 installation Methods 0.000 abstract description 2
- 230000001788 irregular Effects 0.000 abstract description 2
- 230000035939 shock Effects 0.000 abstract 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 238000000926 separation method Methods 0.000 abstract 1
- 239000000306 component Substances 0.000 description 5
- 238000001816 cooling Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 239000008358 core component Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000003685 thermal hair damage Effects 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model relates to a bidirectional diffusion centrifugal fan which comprises a volute assembly, an impeller assembly, an air inlet collector, a shaft head stop device, a motor, a shock pad and a junction box device. The impeller assembly is of a structure composed of long blades and short blades, and outlets are of a bidirectional diffusion structure; due to the structure, annular flow losses and flow separation are reduced, the lifting capacity of impeller output pressure is improved, rapid diffusion of high-speed airflow at the outlets of the blades is effectively slowed down, airflow velocity at the outlets is reduced smoothly, accordingly the pressure of the outlets is increased, formation of irregular vortexes is reduced, a volute tongue of a volute is of an inclined volute tongue structure so that overlaying of noise fundamental frequencies can be reduced, rotation noise is dispersed, and the requirements for low noise can be met. Meanwhile, the shock pad on an installation frame of the volute assembly can be used for slowing down and isolating vibration. Due to the measures, it is guaranteed that the bidirectional diffusion centrifugal fan has the advantages of being low in noise, low in vibration, compact in overall structure, stable in performance and capable of meeting the requirements for comfort of passengers of motor train units.
Description
Technical field
The utility model relates to a kind of centrifugal blower of two-way diffusion, and it is the centrifugal blower of the two-way diffusion of the cooling use of a kind of rail motor set traction electric machine; Belong to field of fluid machinery.
Background technique
Traction electric machine is the critical component that affects rail motor set high speed operation.During traction electric machine work, motor internal winding produces a large amount of heats.For preventing that traction electric machine from crossing cause thermal damage, guaranteed the normal work of rail motor set, need supporting ventilator force heat radiation to traction electric machine, be parts indispensable in trailer system.
The cooling centrifugal blower of traction electric machine is arranged on the mechanical cabin of the bottom of passenger carriage, and in view of the requirement of comfort of passenger, the noise figure of sounding parts must be controlled at below 80dB, otherwise can work the mischief to health, so must meet the low requirement of noise; In addition, assembling, at the mechanical cabin of the bottom of passenger carriage, must reduce vibration values as far as possible and reduce the impact on passenger; Meanwhile, mechanical cabin installing space is limited, must make ventilator pressure coefficient high, and effectively control size makes its compact structure could meet the limited requirement of installing space.For addressing the above problem, must research and development meet rail motor set requirement low noise, vibrate traction cooling blower little, compact overall structure, reduce the impact of various derivative factors of its when operation on passenger as far as possible; The cooling centrifugal blower of existing traction electric machine is the requirement of Bu Neng Full foot usually.
In the world rail motor set traction blower fan is being exported in high pressure situation, its sound pressure level generally must be controlled in 90dB, these rail motor set are controlled in 83dB by the sound pressure level of traction blower fan, belong to a kind of product of relative noise index exhibits excellent in rank of the same type.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned defect, a kind of low noise is provided, vibrates the centrifugal blower of the two-way diffusion of little, compact overall structure and stable performance.
The technical solution of the utility model is: a kind of centrifugal blower of two-way diffusion, comprise spiral case assembly, spindle nose stopping device, impeller assembly, air intake slip ring, scaffold, beam, motor and Junction box assembly, it is characterized in that described impeller assembly is the centrifugal impeller assembly of two-way diffusion and deviated splitter vane structure, this centrifugal impeller assembly is fixed on shaft extension end of motor by spindle nose stopping device; Centrifugal impeller assembly comprises blade, rear trochal disc, front wheel disc and wheel hub; Described blade is provided with the blade of two kinds of specifications, i.e. linear leaf and short blade, and the quantity of linear leaf and short blade equates, ratio is 1:1; The length ratio of linear leaf and short blade is 2.8～3.05:1, and this linear leaf and short blade are welded between rear trochal disc and front wheel disc by uniform being staggered of 1:1; Between this rear trochal disc and front wheel disc, export position and be designed to horn-like and form two-way radian diffusion structure, radian is to the expansion of outlet both sides, and impeller assembly is deviated splitter vane composite structure, and outlet is two-way diffusion structure; Outside air enters impeller from slip ring, and the rotating boosting by impeller raises speed.
Described spiral case assembly is to comprise housing, snail tongue, outlet(discharge) flange, mounting rail, back side panel and front side plate, and this housing is spiral shaped housing structure, and snail tongue is tilting snail tongue structure.In spiral case assembly, after rectification, export the cooling traction electric machine of air mass flow with certain pressure.
Noise-reducing components in described spiral case assembly is that the front and back circular arc size that tilting snail tongue forms its leaning structure is R1:R2=5:3.Front and back circular arc size changes in 0.25 scope.
The centrifugal blower of this two-way diffusion mainly utilizes and between deviated splitter vane in centrifugal impeller assembly and front and back wheel disc, exports the two-way diffuser arrangement in position and realize above feature.
Innovation point of the present utility model: for meeting the low noise requirement of rail motor set system, noise reduction is the core feature of this ventilator, impeller assembly in the main Pneumatic component of centrifugal blower is designed to export between deviated splitter vane and front and back wheel disc the two-way diffusion structure in position, the blade of the blade design long and short two kind specification in impeller assembly, linear leaf is the pneumatic basic element of character, and short blade is for increase pressure and play rectification, shunting action simultaneously; The short blade of the same ratio that is evenly crisscross arranged in the wheel that comes into leaves of impeller assembly, can reduce the annularly flow loss of impeller inside, increases the force value that blade can promote unit sizes effectively simultaneously; This structure plays simultaneously and reduces noise and rising force value.Impeller assembly exit position is designed with two-way diffusion structure, and its effect is to carry out bidirectional guide for the high velocity air that flows out impeller assembly, makes its Speed Reduction, and stream pressure raises; And the sharply diffusion of another effect to be arc water conservancy diversion greatly reduce high velocity air reduces the irregular whirlpool that produces when diffusion, prevent the generation of eddy current crack, this diffusion slowing-down structure has guaranteed the stability of blower performance simultaneously.In addition, snail tongue is tilting snail tongue structure, at snail tongue position leaning structure energy distributed noise peak value, sound peaks energy is distributed in each frequency band and is gone, and the noise that these parts are produced is not superposed to peak value strong noise point.
The measure of boosting of above noise reduction has effectively been controlled the noise of ventilator and has been promoted delivery pressure, and then controlled overall dimensions, make ventilator when work, have good performance performance, when blower fan is put in declared working condition, actual measurement blower fan not higher than 75dB (A), can meet rail motor set passenger's comfort level requirement on the noise figure of passenger's impact.
According to current NBS, the technical order of judgement one class ventilator is " than A sound level ", such " backward plate blade " centrifugal blower than A sound level, to be less than 27dB be acceptable product, some noise shows the comparatively low 3～4dB of the comparable GB of product; The centrifugal blower of this two-way diffusion is when declared working condition, and test result shows that it can be controlled in 18dB than A sound level, for noise objective in similar blower fan shows excellent type; And its low noise scope is wider, and application area is also relatively large.
In sum, the utility model compact structure, makes noise objective obtain the lifting of matter, has changed the situation that fan noise is relatively high of drawing on rail motor set.The long-term normal operation of centrifugal blower of this two-way diffusion, provides reliable guarantee to the trailer system of rail motor set.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model;
Fig. 2 is that A of the present utility model is to structural representation;
Fig. 3 is the structural representation of impeller assembly;
Fig. 4 is the sectional structure schematic diagram of impeller assembly;
Fig. 5 is the structural representation of spiral case assembly;
Fig. 6 is the side view of Fig. 5 spiral case assembly.
In figure: 1-spiral case assembly, 2-spindle nose stopping device, 3-impeller assembly, 4-air intake slip ring, 5-scaffold, 6-beam, 7-motor, 8-Junction box assembly, 9-linear leaf, 10-short blade, 11-rear trochal disc, wheel disc before 12-, 13-wheel hub, 14-housing, 15-snail tongue, 16-outlet(discharge) flange, 17-mounting rail, 18-back side panel, 19-front side plate.
Embodiment
With reference to above-mentioned accompanying drawing, a kind of centrifugal blower of two-way diffusion, comprise spiral case assembly 1, spindle nose stopping device 2, impeller assembly 3, air intake slip ring 4, scaffold (5), beam 6, motor 7 and Junction box assembly 8, it is characterized in that described impeller assembly 3 is for the centrifugal impeller assembly of two-way diffusion and deviated splitter vane structure, this centrifugal impeller assembly 3 is fixed on motor 7 shaft extension ends by spindle nose stopping device 2; Centrifugal impeller assembly 3 comprises blade, rear trochal disc 11, front wheel disc 12 and wheel hub 13;
Described blade is provided with the blade of two kinds of specifications, i.e. linear leaf 9 and short blade 10, and the quantity of linear leaf 9 and short blade 10 equates, ratio is 1:1; The length ratio of linear leaf 9 and short blade 10 is 3:1, and this linear leaf 9 and short blade 10 are connected between rear trochal disc 11 and front wheel disc 12 by the uniform zigzag weld of 1:1; Between this rear trochal disc 11 and front wheel disc 12, export position and be designed to horn-like and form two-way radian diffusion structure, radian is to the expansion of outlet both sides, and impeller assembly 3 is deviated splitter vane composite structure, and outlet is two-way diffusion structure;
Described spiral case assembly 1 is to comprise housing 14, snail tongue 15, outlet(discharge) flange 16, mounting rail 17, back side panel 18 and front side plate 19, and this housing 14 is spiral shaped housing structure, and snail tongue 15 is tilting snail tongue structure.
Uniform being staggered of deviated splitter vane 9,10 in described impeller assembly is arranged between the front wheel disc 12,11 of front and rear wheel, the length of linear leaf: the length of short blade is 3:1
Noise-reducing components in described spiral case assembly 1 is that the front and back circular arc size that tilting snail tongue 15 forms its leaning structure is R1:R2=5:3.
The core component that impeller assembly 3 in this centrifugal blower is system, 1 air-flow guiding of spiral case assembly and supporting effect, beam 6 plays slowing down vibration and separating vibration afterwards in installation.
Each parts in described spiral case assembly 1 are welded each other, and scaffold 17 works to install support simultaneously and strengthens spiral case intensity; Spiral shaped housing 14 and tilting snail tongue 15 are a whole airflow guiding structure; Tilting snail tongue 15 is noise-reducing components, and its effect is to disperse peak energy, and noise peak is reduced; The front and back circular arc size optimum that forms its leaning structure turns to R1:R2=5:3, and front and back circular arc size changes in 0.25 scope.
Claims (3)
1. the centrifugal blower of a two-way diffusion, comprise spiral case assembly (1), spindle nose stopping device (2), impeller assembly (3), air intake slip ring (4), scaffold (5), beam (6), motor (7) and Junction box assembly (8), it is characterized in that:
A, described impeller assembly (3) are the centrifugal impeller assembly of two-way diffusion and deviated splitter vane structure, and this centrifugal impeller assembly (3) is fixed on motor (7) shaft extension end by spindle nose stopping device (2); Centrifugal impeller assembly (3) comprises blade, rear trochal disc (11), front wheel disc (12) and wheel hub (13);
Described blade is provided with the blade of two kinds of specifications, i.e. linear leaf (9) and short blade (10), and the quantity of linear leaf (9) and short blade (10) equates, ratio is 1:1; The length ratio of linear leaf (9) and short blade (10) is 2.8～3.05:1, and this linear leaf (9) and short blade (10) are welded between rear trochal disc (11) and front wheel disc (12) by 1:1 is uniform; Between this rear trochal disc (11) and front wheel disc (12), export position and be designed to horn-like and form two-way radian diffusion structure, radian is to the expansion of outlet both sides, and impeller assembly (3) is deviated splitter vane composite structure, and outlet is two-way diffusion structure;
B, described spiral case assembly (1) are to comprise housing (14), snail tongue (15), outlet(discharge) flange (16), mounting rail (17), back side panel (18) and front side plate (19), this housing (14) is spiral shaped housing structure, and snail tongue (15) is tilting snail tongue structure.
2. the centrifugal blower of a kind of two-way diffusion as claimed in claim 1, it is characterized in that the deviated splitter vane (9 in described impeller assembly, 10) uniform being staggered is arranged between the front wheel disc (12,11) of front and rear wheel, the length of linear leaf: the length of short blade is 3:1.
3. the centrifugal blower of a kind of two-way diffusion as claimed in claim 1, is characterized in that noise-reducing components in described spiral case assembly (1) is that the front and back circular arc size that tilting snail tongue (15) forms its leaning structure is R1:R2=5:3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320654802.5U CN203570673U (en) | 2013-10-23 | 2013-10-23 | Bidirectional diffusion centrifugal fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320654802.5U CN203570673U (en) | 2013-10-23 | 2013-10-23 | Bidirectional diffusion centrifugal fan |
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| Publication Number | Publication Date |
|---|---|
| CN203570673U true CN203570673U (en) | 2014-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320654802.5U Expired - Lifetime CN203570673U (en) | 2013-10-23 | 2013-10-23 | Bidirectional diffusion centrifugal fan |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486078A (en) * | 2013-10-23 | 2014-01-01 | 株洲联诚集团有限责任公司 | Bidirectional diffusion centrifugal fan |
| CN106422017A (en) * | 2016-10-14 | 2017-02-22 | 广州南北电子科技有限公司 | Blower device for breathing machine |
| CN107044441A (en) * | 2017-05-16 | 2017-08-15 | 苏州海歌电器科技有限公司 | Dust catcher impeller |
-
2013
- 2013-10-23 CN CN201320654802.5U patent/CN203570673U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103486078A (en) * | 2013-10-23 | 2014-01-01 | 株洲联诚集团有限责任公司 | Bidirectional diffusion centrifugal fan |
| CN106422017A (en) * | 2016-10-14 | 2017-02-22 | 广州南北电子科技有限公司 | Blower device for breathing machine |
| CN106422017B (en) * | 2016-10-14 | 2019-03-05 | 广州和普乐健康科技有限公司 | A kind of blower device of ventilator |
| CN107044441A (en) * | 2017-05-16 | 2017-08-15 | 苏州海歌电器科技有限公司 | Dust catcher impeller |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140430 |