CN2272501Y - Wearing-proof blade for blower fan - Google Patents
Wearing-proof blade for blower fan Download PDFInfo
- Publication number
- CN2272501Y CN2272501Y CN 96208825 CN96208825U CN2272501Y CN 2272501 Y CN2272501 Y CN 2272501Y CN 96208825 CN96208825 CN 96208825 CN 96208825 U CN96208825 U CN 96208825U CN 2272501 Y CN2272501 Y CN 2272501Y
- Authority
- CN
- China
- Prior art keywords
- impeller
- blade
- blower fan
- air channel
- cavity
- Prior art date
- 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.)
- Expired - Fee Related
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Abstract
The utility model relates to an anti-wear blade for a blower fan, which relates to the anti-wear blade for the blower fan and a compressor in a dust environment and comprises an impeller and an impeller hub. The utility model is characterized in that the impeller has a hollow cavity type structure; an air channel is arranged in the impeller hub and is communicated with to an impeller cavity; a blade of the impeller is provided with an air spraying hole which is communicated with the impeller cavity. When a blower fan impeller of the technical proposal is used, an air cushion thin layer can be formed on the surface of the blade, and solid granules in conveying medium is made not to be directly contacted with the impeller; accordingly, the wear problem of the impeller is fundamentally solved.
Description
The utility model relates to a kind of blower fan of dusty circumstances, anti-abrasion blade of compressor of being used for.
Because fan blade is denuded problem, production brings and has a strong impact on to every profession and trade in recent years.Institute of Chinese large-sized power plant firing coal dust instability for example, and dust removing effects is bad, simultaneously again because the coal in China shortage, coal-burning power plant below most of 100MW is based on burning inferior coal, power plant's air and gas system and boiler induced-draft fan long-time running cause the draught fan impeller abrasion serious in the environment of ash-rich large particle flying dust.The wing blades air-foil fan is restricted in the use, and the worn out back of blade ashes enters the blade cavity and can cause vibration.In addition, the induced draught fan of the various industrial boilers of other industry also exists wear problem.This shows that the blower fan wear problem is an engineering technology problem of being badly in need of solution.For solving the abrasion problem, axial fan is adopted the structure of being convenient to change wearout parts; Centrifugal fan normally is being easy to cover the abrasionproof backplate on the wearout parts; Also have at the blade surface spraying wear-resistant materials, blade pressure surface is processed into zigzag fashion etc.In process for treating surface, once the method that extensively adopts was built-up welding or a surfacing wearable hard alloy on draught fan impeller.More than these traditional anti-wearing methods can be in the wearing and tearing that alleviate blade in varying degrees, but fundamentally do not solve the fan blade wear problem.
The purpose of this utility model provides a kind of novel fan blade, produces the desirable aerodynamic field that can stop the solid grain in the fed sheet of a media to contact with impeller in leaf grating, fundamentally solves the blade wear problem.
The purpose of this utility model is achieved by the following technical solution:
A kind of blower fan anti-abrasion blade comprises impeller and wheel hub, it is characterized in that impeller is the cavity structure of hollow, has the air channel in the wheel hub, and the air channel in the wheel hub feeds impeller cavity, has the air spray orifice that is communicated with impeller cavity on the blade of impeller.Air channel in the wheel hub is an annular setting, is interconnected by tubular air channel between each air channel, and the air channel inlet end is communicated with hollow shaft, and each outlet end feeds each impeller cavity.
Adopt the fan blade of the technical program, its advantage is: pressurized air penetrates from the air spray orifice of blade surface, forms an air cushion thin layer at blade surface.When the pressurized gas jet velocity moderate, Gu and grain can move on the blade surface gas-bearing formation and do not contact with blade, fundamentally solved the wear problem of blade, thereby prolonged blower fan working life, improved the efficient of working, improved economic benefit thereupon.
The utility model is described in further detail below in conjunction with drawings and Examples:
Fig. 1, the structural representation of the utility model blade.
Fig. 2, the A-A sectional view of Fig. 1 blade.
The utility model is according to Gas-solid Two-phase Flow rule in the blade, reaches purpose of the present invention and change the movement locus of solid grain in leaf grating from pneumatic angle.
At first each Impeller Machining on the wheel hub is become hollow and be chamber shape structure or directly adopt hollow blade, be processed into porous type at each blade surface position easy to wear.Hollow for blade is made, can adopt composite structure: earlier with the torsion extrusion modling on request of two flat boards, and weld along the border, carry out machining then, the shape that makes blade import and export the edge meets the requirements.Shown in accompanying drawing 1, accompanying drawing 2, the shroud of impeller (1), hub disk (3) forms hollow impeller with blade (2) up and down, and (8) are impeller cavity.Be processed with a plurality of air spray orifices (4) at the surperficial position easy to wear of blade (2), and communicate with impeller cavity (8).In wheel hub a (5) that links to each other with each impeller and wheel hub b (6), have tubular air channel (9) and annular passage (10), between the annular passage (10), be interconnected by tubular air channel (9) between annular passage (10) and each impeller cavity (8).Each exhaust outlet in air channel all feeds in the impeller cavity (8), and wind inlet is communicated with the chamber, axle center of hollow shaft (7), to feed pressurized air.
During work, pressurized air is entered in air channel (9) and (10) by hollow shaft, and then feeds in each impeller cavity (8).Adjustments of gas pressure, gas is penetrated from the air spray orifice (4) on blade (2) surface, mix mutually with the Dual-Phrase Distribution of Gas olid field, form mixing flow field, form an air cushion thin layer at blade surface, thereby change aerodynamic field and particle trajectory in the leaf grating, solid particle is flowed on the air cushion thin layer, and do not contact, thereby reach the abrasionproof purpose with blade.
Claims (2)
1, a kind of blower fan anti-abrasion blade comprises impeller and wheel hub, it is characterized in that: impeller is the cavity structure of hollow, has the air channel in the wheel hub, and the air channel in the wheel hub feeds impeller cavity, has the air spray orifice that is communicated with impeller cavity on the blade of impeller.
2, blower fan anti-abrasion blade according to claim 1 is characterized in that: the air channel in the wheel hub is interconnected by tubular air channel between each air channel for annular is provided with, and the air channel inlet end is communicated with hollow shaft, and each outlet end feeds in each impeller cavity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96208825 CN2272501Y (en) | 1996-03-23 | 1996-03-23 | Wearing-proof blade for blower fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96208825 CN2272501Y (en) | 1996-03-23 | 1996-03-23 | Wearing-proof blade for blower fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2272501Y true CN2272501Y (en) | 1998-01-14 |
Family
ID=33892668
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96208825 Expired - Fee Related CN2272501Y (en) | 1996-03-23 | 1996-03-23 | Wearing-proof blade for blower fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2272501Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112478148A (en) * | 2020-12-08 | 2021-03-12 | 郑超 | Unmanned aerial vehicle who has rotor water conservancy diversion wear-resisting structure that sand wind environment used |
-
1996
- 1996-03-23 CN CN 96208825 patent/CN2272501Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112478148A (en) * | 2020-12-08 | 2021-03-12 | 郑超 | Unmanned aerial vehicle who has rotor water conservancy diversion wear-resisting structure that sand wind environment used |
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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 |