CN214788174U

CN214788174U - Shaft hole sealing device for fan shell

Info

Publication number: CN214788174U
Application number: CN202120255690.0U
Authority: CN
Inventors: 孟晓敏; 赵帅
Original assignee: Baotou Iron and Steel Group Co Ltd
Current assignee: Baotou Iron and Steel Group Co Ltd
Priority date: 2021-01-29
Filing date: 2021-01-29
Publication date: 2021-11-19
Anticipated expiration: 2031-01-29

Abstract

The utility model discloses a fan casing shaft hole sealing device, including setting up in a plurality of arch parts of wind shell top and main shaft week side, the through-hole that a plurality of arch parts constitute in the middle part is used for entangling after the butt joint the main shaft and with be provided with the sealing washer between the wind shell, each be provided with a plurality of tooth-shaped grooves from top to bottom on the interior circumferencial face that the arch part constitutes. The utility model aims at providing a fan casing shaft hole sealing device, it is sealed respond well.

Description

Shaft hole sealing device for fan shell

Technical Field

The utility model relates to a fan casing shaft hole sealing device.

Background

When a new series of boilers of a power generation operation department of a steel-coated power generation main plant sucks and blows air, a shaft hole is not provided with a sealing device, a casing is deformed after long-time operation and several times of overhaul, and a gap between the casing and the shaft hole is enlarged, so that air leakage of a fan is increased, and power consumption is increased. The flue gas also leaks into the air directly, and because the flue gas of the gas boiler contains carbon monoxide, the flue gas brings adverse effects to the safety production.

At present, the shell and the transmission shaft of most industrial fans in China are not sealed. The industrial fans are divided into two types of negative pressure use or positive pressure use according to different systems. If the fan is used under negative pressure, air at the shaft hole can enter the shell. Firstly, the air leakage of the system is increased, the power consumption of the fan is increased, and the output of the fan is reduced; secondly, the current pollutant emission requirements of China are more and more strict, when the draught fan is used as a boiler induced draft fan, the oxygen content of flue gas is inevitably increased when air enters the shaft hole, the conversion value of pollutant emission is correspondingly increased, and the pollutant emission of the boiler is adversely affected. If the blower is used under positive pressure, the shaft hole blows outwards. If only general media are conveyed, the power consumption of the fan is increased due to outward leakage; if inflammable, explosive, toxic and corrosive media are conveyed, the shaft hole of the machine shell needs to be sealed to avoid leakage of harmful gas. In conclusion, if the shaft hole of the fan shell is not sealed, the power consumption of the fan is increased, the output is reduced, the oxygen content of boiler smoke is increased, and harmful media leak.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a fan casing shaft hole sealing device, it is sealed respond well.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model relates to a fan casing shaft hole sealing device, including setting up in a plurality of arch parts of wind shell top and main shaft week side, the through-hole that a plurality of arch parts constitute in the middle part is used for entangling after the butt joint the main shaft and with be provided with the sealing washer between the wind shell, each be provided with a plurality of tooth-shaped grooves from top to bottom on the interior circumferencial face that the arch part constitutes.

Further, the sealing ring is a sealing rubber pad.

Further, the block comprises four arch parts, and the arc of each arch part is 90 degrees.

Further, the depth of the tooth-shaped groove is 1 mm.

Further, 6 tooth-shaped grooves are formed in the inner circumferential surface formed by each of the arch-shaped members from top to bottom.

Furthermore, the gap between the through hole formed in the middle of the butted multiple arch parts and the main shaft is 2-3 mm.

Further, the arch-shaped parts are fixed by bolts.

Compared with the prior art, the utility model discloses a beneficial technological effect:

1. the utility model is based on the traditional industrial fan, the shell and the transmission shaft are not sealed, the device can prevent the leakage of harmful gas after being installed,

2. the utility model discloses simple structure, reliable operation, easy preparation installation, convenient maintenance, life are longer. The shaft seal clearance is adjusted to adapt to different use temperatures, and the adaptability is strong.

Drawings

The present invention will be further explained with reference to the following description of the drawings.

Fig. 1 is a front view of the shaft hole sealing device of the fan casing of the present invention;

description of reference numerals: 1. a housing; 2. an impeller; 3. fixing the bolt; 4. a main shaft; 5. an arch member; 6. a toothed groove; 7. and sealing the rubber gasket.

Detailed Description

As shown in fig. 1, a fan casing shaft hole sealing device includes 4 arch parts 5 arranged at the top of a fan casing 1 and on the 4 peripheral sides of a main shaft, the circular arc of each arch part is 90 °, the through hole formed in the middle of the butt joint of the 4 arch parts is used for sleeving the main shaft 4 and the fan casing 1, a sealing rubber gasket 7 is arranged between the main shaft 4 and the fan casing 1, a plurality of tooth-shaped grooves 6 are arranged on the inner peripheral surface formed by the arch parts 5 from top to bottom, and the depth of each tooth-shaped groove 6 is 1 mm.

Wherein 6 tooth-shaped grooves 6 are arranged on the inner circumferential surface formed by each arch-shaped part 5 from top to bottom. The gap between the through hole formed by the middle parts of the butted arch parts 5 and the main shaft 4 is 2-3 mm. The arch part 5 is made of a 6mm thick steel plate. 2 of them are used in combination.

The working principle of the device is as follows:

1. the structure of the sealing device for the axle hole of the machine shell is characterized in that 1 pair of arch parts are respectively arranged on two sides of the axle hole, the arch parts are fixed on two sides of the axle hole 2 by bolts, and the clearance between the axle and the machine shell is controlled to be about 2-3mm after the installation;

2. the inner circle part of the shaft hole sealing device is provided with tooth-shaped grooves (annular grooves) with the depth of 1mm at intervals of 2mm, and the total number of the tooth-shaped grooves is 6 after the installation is finished. When the air current passes through first order tooth-shaped groove, the upset can take place for some air current flow direction, and the air leakage can reduce this moment. The air leakage is further reduced as the air flow passes through the second stage of tooth slots. Thus, when the air flow passes through a certain stage of tooth-shaped groove, the air leakage is 0.

The specific installation process of the device is as follows:

1. manufacturing 4 arched components by using a 6mm steel plate according to the size of the shaft, and manufacturing rubber sealing gaskets with the same size;

2. 4 arched parts are arranged on two sides of the shaft hole, and the gap between the shaft hole and the shaft is controlled to be 2-3 mm;

on 8 fans such as a new series of boiler suction fans, air blowers and the like of the power generation operation department of the steel-coated power generation main plant, the problem of large oxygen content of the boiler flue gas is effectively solved, and the standard emission of the boiler flue gas is favorably realized. In addition, the problem that coal gas leaks from the shaft hole of the suction fan creates a prerequisite for safe production. Finally, the air leakage of the boiler system is reduced, the power consumption of the fan is reduced, the load of the boiler is increased, the cost is reduced, and the benefit is created. 8 fans are installed the utility model discloses boiler behind the shaft package under the same load every fan average current reduce about 1A, every fan operates about 8000 hours every year, fan motor power factor is 0.85. The electricity fee is saved every year: 8 × 1.732 × 6 kv × 1 an × 0.85 × 8000 h × 0.5 yuan/kw-hr ═ 28.27 ten thousand yuan.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.

Claims

1. The utility model provides a fan casing shaft hole sealing device which characterized in that, is including setting up in a plurality of arch parts of wind shell top and main shaft week side, the through-hole that a plurality of arch parts constitute in the middle part after the butt joint is used for entangling the main shaft and with be provided with the sealing washer between the wind shell, each be provided with a plurality of tooth grooves from top to bottom on the interior circumferencial face that the arch part constitutes.

2. The fan housing shaft hole sealing device of claim 1, wherein the sealing ring is a sealing rubber pad.

3. The fan housing shaft hole sealing device of claim 1, wherein the packing block comprises four arch-shaped members, and the arc of each arch-shaped member is 90 degrees.

4. The fan housing shaft hole sealing device of claim 1, wherein the depth of the tooth-shaped groove is 1 mm.

5. The fan housing shaft hole sealing device according to claim 1 or 4, wherein the inner circumferential surface formed by each of the arcuate members is provided with 6 tooth-shaped grooves from top to bottom.

6. The fan casing shaft hole sealing device according to claim 1, wherein a gap between a through hole formed in the middle of the butted plurality of arch parts and the main shaft is 2-3 mm.

7. The fan housing shaft hole seal of claim 1, wherein said arcuate member is bolted.