CN102454631A - Fan impellor for improving strength - Google Patents
Fan impellor for improving strength Download PDFInfo
- Publication number
- CN102454631A CN102454631A CN2010105182332A CN201010518233A CN102454631A CN 102454631 A CN102454631 A CN 102454631A CN 2010105182332 A CN2010105182332 A CN 2010105182332A CN 201010518233 A CN201010518233 A CN 201010518233A CN 102454631 A CN102454631 A CN 102454631A
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- China
- Prior art keywords
- blade
- wheel hub
- hub
- extension piece
- draught fan
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- 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.)
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Abstract
The invention discloses a fan impellor for improving strength, wherein the fan impellor comprises a hub, an annular rear plate, a blade and an annular front plate, wherein the rear plate is positioned at the outer periphery of the hub; the bottom edge of the blade is fixed on the surface of the rear plate; the annular front plate is connected with the top edge of the blade; the blade is connected with the outer wall of the hub through an extending sheet; the extending sheet is connected with the blade in a welding mode; and the extending sheet and the hub are casted into an integrated structure. The fan impellor provided by the invention has the beneficial effects that the position of a blade connecting with a weld line is changed, and the region of stress concentration is avoided, thus the impellor can be used stably under the condition of high temperature and high rotation speed.
Description
Technical field
The present invention relates to the industrial ventilation technical field, relate in particular to a kind of industrial furnace propellant circuit draught fan impeller that is used for.
Background technique
Temperature is higher in the industrial furnace that heat treatment is used, to be used for propellant circuit blower fan particularly the impeller in the blower fan higher requirement is arranged.
Referring to Fig. 1, the structure of impeller comprises wheel hub 3 in the existing technology, the hub disk 1, the end that are in the peripheral annular of wheel hub 3 be along blade 4 that is fixed on hub disk 1 surface and the shroud 2 that connects the annular on edge, blade 4 top.
The blade 4 of existing technology is a linear leaf among Fig. 1, and its inboard extension until linking to each other with wheel hub 3 outer walls promptly connects the general mode that adopts welding at A line position.
The common revolution of impeller is about 1480rpm, and industrial furnace for example in the perhydro bell-type furnace, is atmosphere of hydrogen; In order to make the gas circulation in the stove faster, reach the abundant exchange of heat, need to improve impeller rotation to 2100～2200rpm; Like this existing blade wheel structure intensity just is difficult to satisfy usage requirement; Use can cause the A line position that distortion, especially stress ratio are concentrated under high temperature condition, and promptly the weld joint easy of crack causes impeller distortion and damage.
Summary of the invention
The invention provides a kind of high-intensity draught fan impeller, cast the extension piece that is structure as a whole with wheel hub, increased the intensity of original stress ratio, make impeller can under high temperature, high speed conditions, stablize use than the concentrated area at the connection part of wheel hub and blade.
A kind of draught fan impeller that improves intensity; The hub disk, the end that comprise wheel hub, is in the peripheral annular of wheel hub is along blade that is fixed on the back panel surface and the shroud that connects the annular on edge, blade top; Described blade links to each other through extension piece with the wheel hub outer wall; Wherein extension piece is crossed welding manner with blade pass and is connected, and extension piece and wheel hub are the integrative-structure of casting.
The position of extension piece, angle are all corresponding with blade, are equivalent to a part and the wheel hub of blade in the existing technology are cast as integrative-structure, have so just changed the position of blade attachment weld, have avoided the zone that stress is concentrated.
Side that described extension piece is connected with blade along from the wheel hub top along straight line or camber line extend to the back panel surface.
Intersect with the back panel surface on the side edge that described extension piece is connected with blade, and the radial distance between its intersection point and the wheel hub outer wall is 0.5～2 times of hub diameter.This also is for the area that guarantees that extension piece is enough, makes the zone that the weld seam of extension piece and blade is concentrated away from stress.
The described shroud position near central opening of a side of hub disk dorsad is provided with annular stiffening ring.
Described stiffening ring is welded on a side of shroud around the central opening of shroud.Stiffening ring has strengthened the edge strength at the central opening position of shroud, reduces the distortion of shroud.
Described blade has flanging part away from the side of wheel hub.Bead structure can further strengthen the intensity of blade edge, reduces the distortion under the high temperature.
The invention has the beneficial effects as follows the position that has changed the blade attachment weld, avoided the zone that stress is concentrated, make impeller can under high temperature, high speed conditions, stablize use.
Description of drawings
Fig. 1 is the generalized section of draught fan impeller in the existing technology;
Fig. 2 is the generalized section of draught fan impeller of the present invention;
Fig. 3 be among Fig. 2 along the sectional view of C-C line, embodied the structure of blade edge flanging part.
Embodiment
Referring to Fig. 2; Draught fan impeller of the present invention comprises that wheel hub 3, wheel hub 3 have axial hole and be used to penetrate live axle, and wheel hub 3 bottom periphery are provided with the hub disk 1 of annular, 4 ends of blade all are fixed on the shroud 2 of annular along the edge, top that is fixed on hub disk 1 upper surface, blade 4 bottom surface.
The description in relevant orientation among the present invention, as upper and lower, top, the end be among the figure, do not represent absolute orientation.
The side that extension piece 5 is connected with blade 4 is along extending from wheel hub 3 tops along camber line and intersecting with hub disk 1 upper surface; Radial distance between its intersection point and wheel hub 3 outer walls is about 1.2 times of wheel hub 3 diameters; This also is for the area that guarantees that extension piece 5 is enough, the zone that the extension piece 5 and the weld seam of blade 4 are concentrated away from stress.
Carry out annealing in process after the whole processing of impeller, to guarantee that welding stress fully discharges, under average service conditions, deformation no longer takes place in impeller.
Shroud 2 position near central opening of a side of hub disk 1 dorsad is provided with annular stiffening ring 6, and stiffening ring 6 has strengthened the edge strength at the central opening position of shroud 2, reduces the distortion of shroud 2.
Referring to Fig. 2,3, blade 4 has flanging part 7 away from the side of wheel hub 3.Flanging part 7 can further strengthen the intensity at blade 4 edges, reduces the distortion under the high temperature.
Claims (6)
1. draught fan impeller that improves intensity; The hub disk, the end that comprise wheel hub, is in the peripheral annular of wheel hub is along blade that is fixed on the back panel surface and the shroud that connects the annular on edge, blade top; It is characterized in that; Described blade links to each other through extension piece with the wheel hub outer wall, and wherein extension piece is crossed welding manner with blade pass and is connected, and extension piece and wheel hub are the integrative-structure of casting.
2. the draught fan impeller of raising intensity as claimed in claim 1 is characterized in that, side that described extension piece is connected with blade along from the wheel hub top along straight line or camber line extend to the back panel surface.
3. the draught fan impeller of raising intensity as claimed in claim 2 is characterized in that, intersect with the back panel surface on the side edge that described extension piece is connected with blade, and the radial distance between its intersection point and the wheel hub outer wall is 0.5～2 times of hub diameter.
4. the draught fan impeller of raising intensity as claimed in claim 3 is characterized in that, the described shroud position near central opening of a side of hub disk dorsad is provided with annular stiffening ring.
5. the draught fan impeller of raising intensity as claimed in claim 4 is characterized in that, described stiffening ring is welded on a side of shroud around the central opening of shroud.
6. the draught fan impeller of raising intensity as claimed in claim 5 is characterized in that, described blade has flanging part away from the side of wheel hub.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105182332A CN102454631A (en) | 2010-10-25 | 2010-10-25 | Fan impellor for improving strength |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010105182332A CN102454631A (en) | 2010-10-25 | 2010-10-25 | Fan impellor for improving strength |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102454631A true CN102454631A (en) | 2012-05-16 |
Family
ID=46038167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010105182332A Pending CN102454631A (en) | 2010-10-25 | 2010-10-25 | Fan impellor for improving strength |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102454631A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089700A (en) * | 2013-02-20 | 2013-05-08 | 安徽安风风机有限公司 | Draught fan vane wheel |
| US10001144B2 (en) | 2014-01-23 | 2018-06-19 | Johnson Electric S.A. | Blower |
| CN113931874A (en) * | 2021-10-12 | 2022-01-14 | 广州市凯卫莎环保科技有限公司 | Impeller and processing method thereof and high-temperature centrifugal fan applying impeller |
-
2010
- 2010-10-25 CN CN2010105182332A patent/CN102454631A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103089700A (en) * | 2013-02-20 | 2013-05-08 | 安徽安风风机有限公司 | Draught fan vane wheel |
| CN103089700B (en) * | 2013-02-20 | 2015-11-18 | 安徽安风风机有限公司 | A kind of draught fan impeller |
| US10001144B2 (en) | 2014-01-23 | 2018-06-19 | Johnson Electric S.A. | Blower |
| CN113931874A (en) * | 2021-10-12 | 2022-01-14 | 广州市凯卫莎环保科技有限公司 | Impeller and processing method thereof and high-temperature centrifugal fan applying impeller |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20120516 |