CN2059943U - Three-component inlet blade centrifugal ventilator - Google Patents
Three-component inlet blade centrifugal ventilator Download PDFInfo
- Publication number
- CN2059943U CN2059943U CN 89221119 CN89221119U CN2059943U CN 2059943 U CN2059943 U CN 2059943U CN 89221119 CN89221119 CN 89221119 CN 89221119 U CN89221119 U CN 89221119U CN 2059943 U CN2059943 U CN 2059943U
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- blade
- impeller
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Abstract
The utility model discloses an improved centrifugal ventilator, which mainly solves the problem that the blade of the existing fan impeller is easy to be worn, which can influence the running safety; the efficiency is low. The essential technical proposal of the utility model is that the front half part of the impeller blade shape is a ternary twisted blade shape; the back half part of the impeller blade shape is a binary shape. The blade can reduce the loss of airflow inlet and the separation loss of the back section of the blade. The utility model has the advantages of higher efficiency, small abrasion, safe operation and high stability, and can obtain conspicuous economic benefit being matched with large and medium-sized steam power plants.
Description
The utility model relates to a kind of air transporting arrangement, particularly a kind of centrifugal blower with ternary inlet vane.
Ventilator is widely used in the sending of every profession and trades such as metallurgy, chemical industry, machinery, electric power, air inducing, especially with the boiler draft machine of thermal power plant coordinative composition of equipments Important Auxiliary equipment especially, it is very important that its working efficiency and reliability seem, as the product 4-73 type ventilator sixties that Shenyang Blower Factory is produced, its impeller blade is the aerofoil profile hollow blade.In use; Blade is easy to by soot particle worn out; Cause soot particle to enter in the blade cavity; Change the original dynamic equilibrium state of rotor, the running safety of whole blower fan is on the hazard, therefore must shut down dedusting; 300,000 kilowatts of Fired power generating unit for; Shut down one hour, and then sent out 100,000 degree electricity less near, have a strong impact on production.The product 4-60 type ventilator eighties that also has electric power equipment building and repair plant, a kind of Chengdu to produce, its impeller blade is a binary template solid vane, though there is not cavity dust stratification problem, but its blade profile can not finely be complied with flowing of air-flow, working efficiency is not high enough, to the fired power generating unit of 300,000 kilowatt, efficient lacks 1%, then annual many power consumptions hundreds of thousands degree.In addition, in order to improve the working stability of complete machine, existing a kind of double suction is gone into the blower fan of structure, but its main shaft span is big, and thick, thereby the blower fan cost is higher.
The purpose of this utility model is at the problems referred to above, a kind of improved ventilator is provided, it has the smaller impeller blade of windage loss, it is little to wear and tear, high working efficiency, thereby the axial span of the main shaft of complete machine can be done smallerly, cost is lower, functional reliability is than higher, and Economy is relatively good, for big-and-middle-sized fired power generating unit provides desirable ventilator.
The purpose of this utility model is achieved by the following technical solution: complete machine structure mainly is made up of inlet box, main shaft, bearing, intake grill, casing and impeller, its improved technological points is that the impeller blade shapes first half is the ternary twisted blade, latter half of is the binary blade profile, rounding off between two-part.The fine adaptation of this blade profile energy enters the air-flow of impeller, reduces the separation losses of entrance loss and blade back segment, thereby makes the complete blower loss little, the efficient height is putting before this, the span design of main shaft can be got smaller, the main shaft diameter designs more carefully, thereby cost is lowered.
Advantage of the present utility model: because impeller blade adopts the ternary twisted blade, thereby the impeller high working efficiency, it is little to wear and tear, and entire machine design main shaft span is smaller, and cost is lower, and functional reliability and Economy are all relatively good.
Below in conjunction with accompanying drawing the utility model structure is described further:
Fig. 1 is a dual suction type structural representation of the present utility model.
Fig. 2 is the structural representation of impeller blade.
Fig. 3 is single inhalation type structural representation of the present utility model.
Fig. 4 is that single inhalation type of the present utility model is not brought the gas tank structural representation into.
Fig. 5 is the blade profile schematic representation of impeller blade.
See Fig. 1,2, the structure of dual suction type ventilator of the present utility model is made up of impeller 6 and main shaft 2, a casing 5 of two inlet boxs 1 of symmetry, intake grill 4, bearing 3, band blade 7.Wherein inlet box 1, intake grill 4, impeller 6, casing 5 each parts are the template steel and are welded into; Inlet box 1 and intake grill 4, intake grill 4 is connected with casing 5 usefulness bolts; Impeller 6 and main shaft 2 are fixedlyed connected by key.The import of impeller 6 is inserted in the outlet side of intake grill 4.Blade 7 is welded in shroud 8, the mid-game 9.The first half of blade 7 is ternary twisted blades 10, and latter half of is binary blade profile 11, rounding off between two-part.According to the different requirements to the complete machine performance, binary blade profile 11 is divided into long and short two kinds along the length of trailing edge direction, the blade quantity on the complete machine impeller, and adorning long structure blade is 12; The short structure blade of dress is 14.See Fig. 5, ternary twisted blade 10 is made of the different radii circular arc rounding off in A-A, B-B, C-C, D-D, five cross sections of E-E, and the binary blade profile is provided by a profile radius, and the blade profile data are listed by following table.
Symbol description in the table:
I is the latter half of binary blade profile 11 short structure blades of blade;
II is the latter half of binary blade profile 11 long structure blades of blade;
b
0, b
2, b
3, b
4, b
5, b
6It is the axial dimension of surface-type feature point;
D
0, D
a, D
b, D
c, D
d, D
2It is the radial dimension of surface-type feature point;
R
1, R
2It is shroud profile circular arc;
R
a, R
b, R
c, R
d, R
eIt is the radius of arc in 10 5 cross sections of ternary twisted blade;
D
3It is sagittal plane blade bifurcation diameter.
α is a sagittal plane blade bifurcation orientation angle.
R
kBe binary blade profile 11 profile radiuses.
Wherein b, D, R are zero dimension numerical value, promptly represent with respect to D
2Percent value, as D
2(I) is 100, D
0(I) is D
2(I) 71%, as product D
2(I) is 2000mm, then D
0(I) is 1420mm, and other numerical value also by that analogy.
Structure shown in Figure 3 is single inhalation type ventilator of the present utility model, promptly the dual suction type ventilator longitudinally symmetrical center line remove half.
Structure shown in Figure 4 is that single inhalation type of the present utility model is not brought the gas tank ventilator into.
During work, air-flow enters impeller passage from inlet box or intake grill inflow collection, after the impeller work done, discharges along the casing passage.
The results showed: efficient of the present utility model, single inhalation type reaches 88.7%, and dual suction type reaches 83.5%, and is identical with 4-73 type fan efficiency, improves 5.7% than 4-60 type fan efficiency; The axial span of complete machine reduces 25% than 4-73 type ventilator, and its operation stability improves greatly.
Claims (3)
1, a kind of ternary inlet vane centrifugal blower is made up of inlet box, main shaft, bearing, intake grill, casing and impeller, it is characterized in that: the impeller blade shapes first half is the ternary twisted blade, and latter half of is the binary blade profile.
2, centrifugal blower according to claim 1 is characterized in that: the blade quantity on the complete machine impeller, adorning long structure blade is 12.
3, centrifugal blower according to claim 1 is characterized in that: the blade quantity on the complete machine impeller, the short structure blade of dress is 14.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89221119 CN2059943U (en) | 1989-12-14 | 1989-12-14 | Three-component inlet blade centrifugal ventilator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 89221119 CN2059943U (en) | 1989-12-14 | 1989-12-14 | Three-component inlet blade centrifugal ventilator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2059943U true CN2059943U (en) | 1990-08-01 |
Family
ID=4875657
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 89221119 Withdrawn CN2059943U (en) | 1989-12-14 | 1989-12-14 | Three-component inlet blade centrifugal ventilator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2059943U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922467A (en) * | 2010-03-24 | 2010-12-22 | 南通大通宝富风机有限公司 | Centrifugal blower |
-
1989
- 1989-12-14 CN CN 89221119 patent/CN2059943U/en not_active Withdrawn
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101922467A (en) * | 2010-03-24 | 2010-12-22 | 南通大通宝富风机有限公司 | Centrifugal blower |
| CN101922467B (en) * | 2010-03-24 | 2012-01-11 | 南通大通宝富风机有限公司 | Centrifugal blower |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| 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 |