CN218151606U - Novel blade sealing device of movable blade adjustable axial flow fan - Google Patents
Novel blade sealing device of movable blade adjustable axial flow fan Download PDFInfo
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- CN218151606U CN218151606U CN202221686319.0U CN202221686319U CN218151606U CN 218151606 U CN218151606 U CN 218151606U CN 202221686319 U CN202221686319 U CN 202221686319U CN 218151606 U CN218151606 U CN 218151606U
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Abstract
The utility model belongs to the technical field of electric power flue gas conveying fan, concretely relates to novel movable vane adjustable axial fan's blade seal device, the device includes: blade, blade axle, bolt, wheel hub, sealing system, this blade axle are installed inside wheel hub, and the blade passes through bolted connection with the blade axle, and sealing system sets up at the blade outer lane, its characterized in that: an annular groove I is formed in the upper end face of the hub blade hole; the outer ring of the blade handle is provided with a circle of flange; the blade handle part is provided with an annular groove II; the sealing system comprises a sealing check ring, an opening jacket, a spring I, a U-shaped rubber sleeve and a spring II, wherein the spring I is installed in the annular groove I after being coated by the opening jacket, the sealing check ring covers the upper portion of the assembly of the spring I and the opening jacket and is pressed by a flange of the outer ring of the handle portion of the blade, and the spring II is installed in the annular groove II after being coated by the U-shaped rubber sleeve. The structure can effectively ensure that the fan runs well in the environment with stronger acidity and corrosivity.
Description
Technical Field
The utility model belongs to the technical field of electric power flue gas conveying fan, a novel movable vane adjustable axial fan's of specially adapted large-scale movable vane adjustable axial fan blade seal device.
Background
With the rapid development of the power industry, the movable blade adjustable axial flow fan has a very wide application in a coal power generation system, and is often used as a blower, an induced draft fan and a primary fan of a power plant and a booster fan used in flue gas desulfurization. In the operation process of a power plant, if a fan is broken down and stopped once, the whole system stops operating, so that huge loss is brought to a power generation enterprise, and normal production and domestic power utilization of the society are further influenced. Therefore, the requirement for the working reliability of the axial flow fan with the adjustable movable blades is extremely high. Because the blade installation angle of the movable blade adjustable axial flow fan can be adjusted on line through the adjusting mechanism in the running process of the fan, a reasonable fit clearance can exist between the blade and the hub. For flue gas axial fan, in its operation process, in order to prevent that the flue gas from getting into the wheel hub through the clearance between blade and the wheel hub inside, and then produce the corruption to inside spare part, generally can set up sealedly in blade stalk portion position. Along with the domestic ultralow emission transformation, the operating smoke temperature of the fan is lower, so that acidic corrosive liquid formed after the smoke is easily condensed can seriously corrode the impeller, and the wall surface in the gap is easily corroded to form rust scale. In addition, the mixture that the ash powder formed among the acidic corrosive liquid mixes the flue gas, easily bond and form the scale deposit on the wall in the gap, if fan blade does not adjust or only adjust in the narrow range for a long time, can have more and more rust scale and ash powder scale deposit in the gap between blade and wheel hub, if these rust scale and ash powder scale deposit can not in time clear away, blade and wheel hub can progressively be bonded together by these rust scale and ash powder scale deposit, adjust torque when causing the regulation blade increases or is inhomogeneous, finally lead to blade bite and each part to damage, force the fan to shut down.
SUMMERY OF THE UTILITY MODEL
The utility model aims at overcoming above-mentioned defect, providing a novel movable vane adjustable axial fan's blade sealing device, form rust scale and ash scale deposit in avoiding corrosive flue gas and ash impurity to get into blade and wheel hub's the gap, cause the movable vane to adjust the bite when the fan moves.
The utility model discloses technical scheme: a novel blade sealing device of axial flow fan with adjustable moving blades comprises: blade, blade axle, bolt, wheel hub, sealing system, this blade axle are installed inside wheel hub, and the blade passes through bolted connection with the blade axle, and sealing system sets up at blade stalk portion outer lane, its characterized in that: an annular groove I is formed in the upper end face of the hub blade hole; the outer ring of the blade handle is provided with a circle of flange; the blade handle part is provided with an annular groove II; the sealing system comprises a sealing retainer ring, an opening jacket, a spring I, a U-shaped rubber sleeve and a spring II, wherein the spring I is installed in the annular groove I after being coated by the opening jacket, the sealing retainer ring covers the assembly of the spring I and the opening jacket and is pressed by a flange of the outer ring of the handle part of the blade, the spring II is installed in the annular groove II after being coated by the U-shaped rubber sleeve, the spring I is of a V-shaped structure and is made of austenitic stainless steel, and the opening jacket is made of polytetrafluoroethylene glass fibers.
The utility model has the advantages that: the sealing system is arranged on the outer ring of the blade, can protect the blade and the blade shaft, and consists of a sealing check ring, an opening jacket, a spring I, a U-shaped rubber sleeve and a spring II, wherein the spring I is arranged in the annular groove I after being coated by the opening jacket, the sealing check ring covers the upper part of the assembly of the spring I and the opening jacket and is pressed by a flange of the outer ring of the handle part of the blade, and the spring II is arranged in the annular groove II after being coated by the U-shaped rubber sleeve. A first defense line for flue gas is formed by combining a sealing check ring and an opening jacket coated with a spring I in a sealing system, the sealing check ring is made of stainless steel, abrasion and consumption can be effectively reduced, use and maintenance cost is remarkably reduced, the V-shaped structure of the spring I enables the spring I to generate outward expansion elasticity under the pre-compression condition, the sealing check ring can be firmly pressed on the upper portion of an annular groove I, meanwhile, the sealing check ring is tightly attached to a flange of an outer ring of a blade handle portion to tightly block the flue gas, compared with the sealing of a single elastic material, the sealing system has the capability of better resisting acidic environment and flue gas corrosion, even if acid dew corrosion occurs, the elasticity of the opening jacket is still ensured due to the existence of the spring I, and the effectiveness of flue gas blocking is ensured. The U-shaped rubber sleeve coated with the spring II forms a second defense line for smoke, and the spring has elastic force towards the inner bag, so that the inner ring layer of the blade is tightly wrapped, and good sealing is realized. In the two seals, the sealing retainer ring tightly prevents smoke from entering, the U-shaped rubber sleeve tightly surrounds the blades, one of the U-shaped rubber sleeve is internally and externally used for achieving a good sealing effect, and a certain rotating gap is reserved in the middle of the U-shaped rubber sleeve, so that the opening degree of the movable blade adjustable blade can be adjusted conveniently. Therefore, the novel sealing device can block smoke from entering gaps between the blades and the hub under the isolation effect of two defense lines, and particularly can well protect the blades and related rotating parts in stronger acidic and corrosive environments.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a partially enlarged schematic view of the structural schematic diagram of the present invention.
Fig. 3 is a schematic view of the combination of the structural spring i and the opening clamping sleeve of the present invention.
In the drawings, corresponding technical features are labeled as follows:
1-blade, 2-bolt, 3-blade handle flange, 4-sealing retainer ring, 5-annular groove I, 6-split jacket, 7-spring I, 8-U-shaped rubber sleeve, 9-spring II, 10-annular groove II, 11-hub and 12-blade shaft.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in the figure, when the utility model is implemented, the utility model is divided into three steps: firstly, a spring II (9) is embedded into a U-shaped rubber sleeve (8) and then sleeved in an annular groove II (10) of an outer ring of a blade (1); then, a V-shaped spring I (7) is covered by an open jacket (6), and then is embedded into an annular groove I (5) on a hub (11), and then is covered by a sealing retainer ring (4) above the annular groove I; and finally, inserting a blade shaft (12) into a hub (11) from top to bottom, connecting the blade (1) and the blade shaft (12) together through a bolt (2), wherein a flange (3) of an outer ring of the blade (1) is just pressed on a sealing retainer ring (4), and meanwhile, a combined body of a U-shaped rubber sleeve (8) and a spring II (9) is nested in boundary positions of the blade (1), the hub (11) and the blade shaft (12). The actual use condition shows that this novel sealing device of adjustable blade of movable vane, sealed effectual, the reliability is high, can deal with acid environment, isolated flue gas and protection blade more effectively.
Claims (3)
1. A novel blade sealing device of axial flow fan with adjustable moving blades comprises: blade, blade axle, bolt, wheel hub, sealing system, this blade axle is installed inside wheel hub, and the blade passes through bolted connection with the blade axle, and sealing system sets up at the blade outer lane, its characterized in that: an annular groove I is formed in the upper end face of the hub blade hole; the outer ring of the blade is provided with a circle of flange; the blade handle part is provided with an annular groove II; the sealing system is composed of a sealing retainer ring, an opening jacket, a spring I, a U-shaped rubber sleeve and a spring II, wherein the spring I is installed in the annular groove I after being coated by the opening jacket, the sealing retainer ring covers the assembly of the spring I and the opening jacket and is pressed by a flange of the outer ring of the handle part of the blade, and the spring II is installed in the annular groove II after being coated by the U-shaped rubber sleeve.
2. The novel blade sealing device for the movable blade adjustable axial flow fan as claimed in claim 1, characterized in that: the spring I is of a V-shaped structure and is made of austenitic stainless steel.
3. The blade sealing device of the novel movable blade adjustable axial flow fan as claimed in claim 1 or 2, wherein: the open jacket is made of polytetrafluoroethylene glass fiber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221686319.0U CN218151606U (en) | 2022-07-01 | 2022-07-01 | Novel blade sealing device of movable blade adjustable axial flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221686319.0U CN218151606U (en) | 2022-07-01 | 2022-07-01 | Novel blade sealing device of movable blade adjustable axial flow fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218151606U true CN218151606U (en) | 2022-12-27 |
Family
ID=84592387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221686319.0U Active CN218151606U (en) | 2022-07-01 | 2022-07-01 | Novel blade sealing device of movable blade adjustable axial flow fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218151606U (en) |
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2022
- 2022-07-01 CN CN202221686319.0U patent/CN218151606U/en active Active
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