CN2295066Y - Fan with wear-resistant dust-resistant vane - Google Patents
Fan with wear-resistant dust-resistant vane Download PDFInfo
- Publication number
- CN2295066Y CN2295066Y CN 96217722 CN96217722U CN2295066Y CN 2295066 Y CN2295066 Y CN 2295066Y CN 96217722 CN96217722 CN 96217722 CN 96217722 U CN96217722 U CN 96217722U CN 2295066 Y CN2295066 Y CN 2295066Y
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- blade
- resistant
- dust
- impeller
- air
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Abstract
The utility model relates to a fan with wear-resistant dust-resistant blades. The utility model is characterized in that the periphery of an impeller disc is provided with air vents which are uniformly arranged and are corresponding to each blade; each blade of the impeller is provided with an air spraying device which is composed of an air chamber and a gap or a small hole; the vent holes of the impeller are communicated with the air spraying devices. When the fan runs, airflow from the rear part of the impeller disc is sprayed out from the air spraying devices of the blades through the vent holes of the impeller; the airflow prevents airflow containing powdered coal, flue dust and other small granules from directly striking the surfaces of the blades, and accordingly, the wear-resistant and the dust-resistant purposes are achieved.
Description
The utility model is a kind of blower fan that abrasionproof dust-resistant blade is arranged.It relates to centrifugal blower, axial-flow blower etc.Chemical industry, metallurgical, the mine, all kinds of blower fans of a large amount of uses of each department such as electric power, as: centrifugal blower, axial-flow blower, roots blower etc., carry the dust that contains high concentration when these blower fans, coal dust, during air-flows such as cigarette ash, because these particles with the gas high-speed motion, a large amount of shells that impact blower fan repeatedly, wheel disc, blade etc., cause these position heavy wear, particularly the wearing and tearing of impeller are the fastest, the power plant that China south has, relatively poor because of the ature of coal that uses, be used for the mill exhauster of pulverized coal conveying in the boiler, its damage in impeller is serious, will change less than one month, seriously influence the safe and stable operation of thermal power plant, increase maintenance expenses.
In the thermal power plant that has, because the efficient of deduster is not high, dust burdening is big in the flue gas, wearing and tearing to boiler induced-draft fan are also very serious, loss that causes and harm also than the serious wear of mill exhauster many, repeatedly took place in the domestic thermal power plant blade of induced draught fan worn out after, cigarette ash enters in the cavity of wing blades and causes the balance of impeller destroyed, causes the induced draught fan judder and the serious accident of off-axis driving.The wearing and tearing of fan blade mainly occur in blade inlet place and the outlet port working surface position by hub disk.
Another problem that blower fan is often run in using is, the boiler induced-draft fan blade surface, mainly be that non-working surface is stained with ash, particularly boiler adopts when being venturi water film deduster, contain water droplet in the flue gas, make induced draught fan blade surface dust stratification cause vibration, the frequent blowing-out machine of having to carries out deashing, workload is very big, loses also very serious.Four 670 tons in certain power plant/time boiler, a year deashing number of times once reached 153 times, therefore lacked generated energy 6,120 ten thousand kilowatt hours, again because deashing makes the motor frequent starting repeatedly cause the motor burning accident.
In order to solve fan blade abrasionproof and dust-resistant problem, people have found out various ways, taked many measures, the way commonly used that the abrasionproof aspect adopts is: 1, blade surface build-up wear-resistant material is as 638 rich chromium cast iron welding rods, and 2, sprayed wc or be stained with and connect the wear-resistant ceramic grain; , 3, installing abrasionproof lining tile or install dismountable movable lining additional and pull etc. on the blade, 4, improve leafly, change the back into as forward-curved blade to manage to straight pull; Reduce rotation speed of fan etc.Prevent blade surface dust stratification aspect, mainly be to reduce moisture content in the flue dust as far as possible, improves flue-gas temperature.The power plant that has adopts the method for steam soot blowing in order to remove the dust stratification of blade surface, but blows the preceding necessary heating coil of ash, and fully hydrophobic, prevents that water droplet from directly impacting blade, influences blade root intensity, prevents that simultaneously blade surface from being aggravated dust stratification by wet back.More than these measures, part has delayed the rate of wear and the dust stratification speed of blower fan to a certain extent, but some wear-resisting and remedial measures afterwards just strictly speaking, also be far from being abrasionproof and dust-resistant are not fundamentally dealt with problems.
The purpose of this utility model addresses these problems exactly, and the measure of employing prevention property guarantees fan blade abrasionproof and dust-resistant, accomplishes safety, economical operation, saves and repairs and change a large amount of expenses and the man-hour that draught fan impeller is used, and improves Utilization ratio.
The utility model is such: having on the circumference of draught fan impeller wheel disc can be by the vent of air-flow, and it is uniform on the week of wheel disc garden, and corresponding with each blade.Each blade of impeller has air jet system, it is made up of air chamber, slit or aperture, these air chambers and slit or aperture are connected with vent on the impeller again, when fan operation, pressure reduction is arranged before and after the wheel disc, so from the air-flow behind the draught fan impeller wheel disc, by the air jet system of the vent on the impeller through each blade, by slit on the air jet system air chamber or aperture ejection, this strand air-flow prevents to contain the direct impact blades of the air-flow surface of coal dust, cigarette ash, dust, thereby plays the effect of abrasionproof and dust-resistant.The air jet system of blade fixing on impeller and blade can be adopted welding, bolt or edge cover etc., and the abrasionproof measure can be done in the surface of air jet system.Though centrifugal blower, its concrete structure difference of axial-flow blower, but the air-flow that sprays in the slit of air jet system that can be by utilizing blade or the aperture, prevent to contain that coal is confused, the direct impact blades of the air-flow surface of cigarette ash and dust, thereby reach the purpose of abrasionproof and dust-resistant, principle is the same with essential structure.Air jet system can be located at front side of vane, blade inlet and also can be located on the non-working surface.In general purpose is an abrasionproof, and air jet system is located at working surface, blade inlet place etc., if dust-resistant, air jet system is at non-working surface.
Characteristics of the present utility model are; implement easily; cost is low; safe and reliable; can solve blade abrasionproof problem and can solve blade again and be stained with grey problem, be to have solved two problems simultaneously with a kind of method, simple and convenient; and be a kind of preventative measure, can save the vibration protection device of large fan.The abrasionproof measure that fan blade is taked in the prior art, its technological requirement height, workload is big, and is expensive many, as mill exhauster surfacing blade, a typhoon machine supporting with 400 tons of direct current cookers needs 9000 yuan of funds, and leaf weight increases, and power consumption increases, the method that the installing abrasionproof is very little watt, its technology also is very complicated, makes blade and casing lose original molded lines in addition, and fan efficiency is descended.
Attached Fig. 1 and 2 is embodiment's schematic representation of the present utility model, and Fig. 2 is the view of the A-A direction of Fig. 1.Accompanying drawing is made up of slip ring (1), shell (2), impeller (3), air jet system (4), vent (5), blade (6), bearing (7) etc.As shown in the figure: when fan operation, because pressure reduction is arranged before and after the impeller hub disk, so the air-flow that comes from the impeller hub disk enters air jet system on each corresponding blade through the vent on the impeller, aperture or slit ejection by air jet system, though the direction difference of these two bursts of air-flow ejections, but can both slow down and prevent to contain the direct impact blades of air-flow surfaces such as coal is confused, cigarette ash, reach the purpose of abrasionproof and dust-resistant.For the convenient processing and manufacture air jet system preferably adopts welding manner, Wear-resistant Treatment can be done in its surface.For the effect that improves abrasionproof and dust-resistant also can be behind impeller parts that boost of dribbling, kinetic energy when utilizing blower fan to rotate is raised to certain pressure to air-flow, spray by air jet system through vent then, perhaps introduce clean, the air-flow that certain pressure head is arranged, spray by air jet system through vent, reach same purpose.
Claims (3)
1. blower fan that abrasionproof dust-resistant blade is arranged, it comprises slip ring (1), shell (2) impeller (3), blade (6), bearing (7) etc., it is characterized in that, vent (5) is arranged on the hub disk, each blade (6) has air jet system (4), and vent (5) corresponding on air jet system (4) and the wheel disc is connected, when fan operation, the vent of air-flow on impeller that the blower fan wheel disc is outer is from the air jet system ejection of each corresponding blade.
2. a kind of blower fan that abrasionproof dust-resistant blade is arranged according to claim 1 is characterized in that vent (5) is uniform on the week of wheel disc garden, and corresponding with each blade.
3. a kind of blower fan that abrasionproof dust-resistant blade is arranged according to claim 1 is characterized in that air jet system can be located at front side of vane, blade inlet, also can be located on the non-working surface, and the air jet system of blade (4) is made up of air chamber and aperture or slit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96217722 CN2295066Y (en) | 1996-08-10 | 1996-08-10 | Fan with wear-resistant dust-resistant vane |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 96217722 CN2295066Y (en) | 1996-08-10 | 1996-08-10 | Fan with wear-resistant dust-resistant vane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2295066Y true CN2295066Y (en) | 1998-10-21 |
Family
ID=33898770
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 96217722 Expired - Fee Related CN2295066Y (en) | 1996-08-10 | 1996-08-10 | Fan with wear-resistant dust-resistant vane |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2295066Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066087A (en) * | 2015-08-14 | 2015-11-18 | 吉首大学 | Tail heat recovery type dust retention preventing oil burning boiler |
-
1996
- 1996-08-10 CN CN 96217722 patent/CN2295066Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105066087A (en) * | 2015-08-14 | 2015-11-18 | 吉首大学 | Tail heat recovery type dust retention preventing oil burning boiler |
| CN105066087B (en) * | 2015-08-14 | 2018-01-12 | 衢州大通锅炉有限责任公司 | A kind of anti-laying dust oil burning boiler of tail heat reclamation type |
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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 |