CN204476855U - Low noise with conduit is without spiral case centrifugal blower - Google Patents
Low noise with conduit is without spiral case centrifugal blower Download PDFInfo
- Publication number
- CN204476855U CN204476855U CN201520056866.4U CN201520056866U CN204476855U CN 204476855 U CN204476855 U CN 204476855U CN 201520056866 U CN201520056866 U CN 201520056866U CN 204476855 U CN204476855 U CN 204476855U
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- China
- Prior art keywords
- conduit
- blade
- wheel cap
- section
- centrifugal blower
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- Withdrawn - After Issue
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Abstract
The utility model discloses a kind of low noise with conduit without spiral case centrifugal blower, comprise wheel disc, wheel cap, blade and equally distributed conduit; It is characterized in that: wheel cap, wheel disc and blade adopt welding manner to be connected, and blade design is airfoil fan, and the number of blade is 8, is uniformly distributed centered by the axis of wheel cap, and conduit mills out after being blade processing; The utility model utilizes CFD technology, and by having conduit and carrying out numerical simulation without conduit without spiral case centrifugal blower, find that conduit improves the boundary layer separation around blade, after inhibit airfoil fan, whirlpool comes off; Pressure difference simultaneously between front side of vane and non-working surface reduces, thus eddy current crack is reduced to some extent.
Description
Technical field
The utility model belongs to technical field of general-purpose equipment, especially relates to a kind of low noise with conduit without spiral case centrifugal blower.
Technical background
Centrifugal blower is one of main Types of blower fan, is widely used in ventilation, operation of air conditioning systems, and the field such as metallurgy, electric power, coal, petroleum and chemical industry, is the core machinery of many industrial departments conveying gas medium and main energy consumption equipment.Improve research and the design level of centrifugal blower, to the development accelerating national economy, energy saving has great significance.
Without spiral case centrifugal blower use abroad many, have the experience of comparative maturity.Along with the introduction of foreign technology, the air-conditioner set in Some Domestic project all have employed this novel fan, instead of traditional centrifugal blower.Be usually used in unitary air handling unit and four sides air-out card type fan and coil unit without volute casing centrifugal blower fan, be made up of slip ring, centrifugal impeller, motor and motor support frame.Have without " surge " phenomenon without volute casing centrifugal blower fan, the advantages such as volume is little, and Way out is any.Although there is plurality of advantages without volute casing centrifugal blower fan, because its quantity in the application of air-conditioner wind unit is more, still keep away the larger noise of unavoidable generation.
Noise problem greatly have impact on work and the living environment of people, more and more causes the concern of people.And blower fan is exactly a kind of important pollution source of noise.Therefore study blower fan, except will studying the method for its performance of raising, also will reduce the noise of blower fan as far as possible, this is significant to minimizing environmental pollution.From now on, the turbomachine product of Study and Development high-efficient low-noise is also inevitable developing direction.
Summary of the invention
The purpose of this utility model is for existing comparatively large without volute casing centrifugal blower fan noise, provides a kind of low noise with conduit without volute casing centrifugal blower fan.
The technological scheme that the invention for solving the technical problem adopts is as follows:
Low noise with conduit, without a spiral case centrifugal blower, comprises wheel disc, wheel cap, blade and equally distributed conduit.Wheel cap, wheel disc and blade adopt welding manner to be connected, and blade design is airfoil fan, and the number of blade is 8, is uniformly distributed centered by the axis of wheel cap, and conduit mills out after being blade processing.
Described wheel cap is the combination of ring and frustoconic shape, cold moudling, and the place of ring and frustoconic shape handing-over is tangent; Described wheel disc is a disc-shape, and centre arranges flange arrangement for mounted motor axle; Described blade profile is a spline curve, and its sectional shape is aerofoil profile, and the place contacted with wheel cap meets the molded line of wheel cap, and the section blades chord length wherein contacted with wheel cap is shorter than the cross section with sheave contact; Described conduit is arc-shaped structure, and from 20% of blade chord length, the direction along blade inlet to outlet, is distributed on the pressure side of blade.The central axis of conduit and wheel disc plane parallel, and the radius of arc in conduit cross section and the vane thickness of this section be fixed proportion relation, namely the degree of depth of conduit and width are reduction trend from reducing along with vane thickness.In order to make conduit even to the airflow influence through runner, adopt three conduits to be axially uniformly distributed on blade pressure surface, adjacent two conduit spacings are equal.The total length of groove is 0.6L ~ 0.7L, and conduit any place cross section circular arc radius of curvature is 0.5 ~ 0.6
.Spacing between adjacent conduit is 0.25h, and wherein L is blade chord length,
for the thickness of conduit section blade, h is the height of blade.
The good effect that the utility model is produced technically is:
The utility model utilizes CFD technology, and by having conduit and carrying out numerical simulation without conduit without spiral case centrifugal blower, find that conduit improves the boundary layer separation around blade, after inhibit airfoil fan, whirlpool comes off; Pressure difference simultaneously between front side of vane and non-working surface reduces, thus eddy current crack is reduced to some extent.
Accompanying drawing illustrates:
Fig. 1 is graphics of the present utility model;
Fig. 2 is plan view of the present utility model;
Fig. 3 is the partial enlarged drawing of the utility model axial cross section;
Fig. 4 is plan view of the present utility model;
Fig. 5 is partial enlarged drawing of the present utility model.
embodiment:
Below in conjunction with accompanying drawing, the utility model is further described:
As shown in Figure 1, the utility model is made up of wheel cap 1, wheel disc 2, blade 3, conduit 4.Described shroud 1 is the combination of arc and taper, cold moudling, and the place of arc and taper handing-over is tangent; Described wheel disc 2 is a disc-shape, and centre arranges flange arrangement for mounted motor axle; As shown in Figure 2, described blade 3 cross section is a spline curve, and shape is aerofoil profile, and the place contacted with wheel cap meets the molded line of wheel cap, and the section blades chord length wherein contacted with wheel cap is shorter than the cross section with sheave contact; As shown in Fig. 3, Fig. 4, Fig. 5, described conduit 4 is arc-shaped structure, and from 20% of blade chord length, the direction along blade inlet to outlet, is distributed on the pressure side of blade.The central axis of conduit and wheel disc plane parallel, and the radius of arc in conduit cross section and the vane thickness of this section be fixed proportion relation, namely the degree of depth of conduit and width are reduction trend from reducing along with vane thickness.In order to make conduit even to the airflow influence through runner, adopt three conduits to be axially uniformly distributed on blade pressure surface, adjacent two conduit spacings are equal.The total length of groove is 0.6L ~ 0.7L, and cross section, conduit somewhere circular arc radius of curvature is 0.5 ~ 0.6
.Spacing between adjacent conduit is 0.25h, and wherein L is blade chord length,
for the thickness of conduit section blade, h is the height of blade.
For certain model without spiral case centrifugal blower, the total length of groove is 115.3mm, and maximum radius of arc is 9.00mm, and minimum radius of arc is 3.50mm, and the spacing between adjacent conduit is 50mm.By contrasting original blower fan and the blower fan after improving, what find not have a conduit with the power dissipation ratio without spiral case centrifugal blower of conduit under declared working condition reduces 5.2dB without spiral case centrifugal blower noise.
Claims (2)
1. be with the low noise of conduit without spiral case centrifugal blower, comprise wheel disc, wheel cap, blade and equally distributed conduit; It is characterized in that: wheel cap, wheel disc and blade adopt welding manner to be connected, and blade design is airfoil fan, and the number of blade is 8, is uniformly distributed centered by the axis of wheel cap, and conduit mills out after being blade processing;
Described wheel cap is the combination of ring and frustoconic shape, cold moudling, and the place of ring and frustoconic shape handing-over is tangent; Described wheel disc is a disc-shape, and centre arranges flange arrangement for mounted motor axle; Described blade profile is a spline curve, and its sectional shape is aerofoil profile, and the place contacted with wheel cap meets the molded line of wheel cap, and the section blades chord length wherein contacted with wheel cap is shorter than the cross section with sheave contact; Described conduit is arc-shaped structure, and from 20% of blade chord length, the direction along blade inlet to outlet, is distributed on the pressure side of blade; The central axis of conduit and wheel disc plane parallel, and the radius of arc in conduit cross section and the vane thickness of this section be fixed proportion relation, namely the degree of depth of conduit and width are reduction trend from reducing along with vane thickness; In order to make conduit even to the airflow influence through runner, adopt three conduits to be axially uniformly distributed on blade pressure surface, adjacent two conduit spacings are equal.
2. the low noise of band conduit according to claim 1 is without spiral case centrifugal blower, it is characterized in that: the total length of conduit is 0.6L ~ 0.7L, and conduit any place cross section circular arc radius of curvature is 0.5 ~ 0.6
; Spacing between adjacent conduit is 0.25h, and wherein L is blade chord length,
for the thickness of conduit section blade, h is the height of blade.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520056866.4U CN204476855U (en) | 2015-01-27 | 2015-01-27 | Low noise with conduit is without spiral case centrifugal blower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520056866.4U CN204476855U (en) | 2015-01-27 | 2015-01-27 | Low noise with conduit is without spiral case centrifugal blower |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204476855U true CN204476855U (en) | 2015-07-15 |
Family
ID=53632647
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520056866.4U Withdrawn - After Issue CN204476855U (en) | 2015-01-27 | 2015-01-27 | Low noise with conduit is without spiral case centrifugal blower |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204476855U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675748A (en) * | 2015-01-27 | 2015-06-03 | 浙江理工大学 | Low-noise volute-free centrifugal ventilator with channels |
| CN105650032A (en) * | 2016-03-29 | 2016-06-08 | 浙江理工大学 | Pressure expander of centrifugal compressor |
| CN106682276A (en) * | 2016-12-05 | 2017-05-17 | 华东理工大学 | Ventilation cabinet operating noise control method based on CFD simulation |
| CN117072479A (en) * | 2023-10-13 | 2023-11-17 | 潍坊精华动力科技有限公司 | Impeller with different curves on front and back surfaces and centrifugal fan/pump provided with impeller |
-
2015
- 2015-01-27 CN CN201520056866.4U patent/CN204476855U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104675748A (en) * | 2015-01-27 | 2015-06-03 | 浙江理工大学 | Low-noise volute-free centrifugal ventilator with channels |
| CN105650032A (en) * | 2016-03-29 | 2016-06-08 | 浙江理工大学 | Pressure expander of centrifugal compressor |
| CN106682276A (en) * | 2016-12-05 | 2017-05-17 | 华东理工大学 | Ventilation cabinet operating noise control method based on CFD simulation |
| CN117072479A (en) * | 2023-10-13 | 2023-11-17 | 潍坊精华动力科技有限公司 | Impeller with different curves on front and back surfaces and centrifugal fan/pump provided with impeller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150715 Effective date of abandoning: 20170405 |
|
| AV01 | Patent right actively abandoned |
Granted publication date: 20150715 Effective date of abandoning: 20170405 |