CN216278578U - Combined shaft end seal of gas blower - Google Patents

Abstract

The application discloses coal gas blower combination formula axle head is sealed, which comprises a housing, both ends in the casing are equipped with the mounting hole, install the seal in the mounting hole, install the main shaft jointly in two mounting holes, the axle sleeve is all installed at the both ends of main shaft, two axle sleeves are located two sealings respectively, be equipped with the broach gasket between axle sleeve and the seal, the broach gasket is located the one end that is close to the casing inner wall, be equipped with the sealed nitrogen gas of broach and insert the passageway jointly on casing and the seal, the sealed nitrogen gas of broach inserts the one end that the passageway is located the casing and is equipped with the sealed nitrogen gas of broach and inserts the mouth. According to the combined shaft end sealing device, the sealing effect of combining the two sealing structures of the comb tooth sealing and the carbon ring sealing is realized, so that the centrifugal gas blower still has a good sealing effect under the conditions that the medium is high in moisture content, has bonding substances and much dust impurities, and is flammable, explosive and toxic, the normal use and the personal safety of equipment are ensured, and the maintenance cost is reduced.

Description

Combined shaft end seal of gas blower

Technical Field

The utility model relates to the technical field of air blower shaft seals, in particular to a combined shaft end seal of a gas air blower.

Background

Coke oven gas produced by a coke oven in the coking industry at present belongs to flammable, explosive and toxic gas, and the leakage of the gas causes environmental pollution and great potential safety hazard. The coal gas blower in the production process mostly adopts a D-shaped centrifugal blower, the shaft end seal of the coal gas blower generally adopts labyrinth comb seal, the principle is that nitrogen with the pressure higher than that of a sealed medium is introduced to prevent the leakage of the coke oven gas, the pressure of the nitrogen is about 0.2-0.3 MPa higher than that of the coke oven gas, and the nitrogen flows into the machine to prevent the leakage of the coke oven gas.

However, the specific use has the following defects that the pressure fluctuation of the coke oven gas and the abrasion clearance of the comb tooth sealing sheet are increased to cause the coke oven gas leakage; secondly, the abrasion clearance of the sealing sheet is increased when the comb tooth seal is operated for a long time, so that the nitrogen consumption is increased, and the index of the nitrogen content in the coal gas is unqualified; thirdly, the coke oven gas contains more impurities such as coal dust, the service life of the comb tooth seal is short, and the production is influenced by frequent maintenance; to this end, we propose a combined shaft end seal for gas blowers to solve the above problems.

SUMMERY OF THE UTILITY MODEL

The application provides a combination formula axle head of coal gas air-blower is sealed, has solved traditional air-blower when carrying coal gas, and the bearing seal wearing and tearing are big, thoughtlessly have the problem of too much nitrogen gas in the coal gas.

The application provides a combined shaft end seal of a gas blower, which comprises a casing, wherein mounting holes are formed in two ends in the casing, a seal body is installed in each mounting hole, a main shaft is jointly installed in each mounting hole, shaft sleeves are installed at two ends of each main shaft and are respectively located in the two seal bodies, comb tooth sealing pieces are arranged between the shaft sleeves and the seal bodies and are located at one ends close to the inner wall of the casing, comb tooth sealing nitrogen gas access passages are jointly arranged on the casing and the seal body and are located at one ends of the casing, comb tooth sealing nitrogen gas access ports are arranged at one ends of the seal body and extend to the comb tooth sealing pieces, and a plurality of carbon ring sealing components are further arranged between the seal body and the shaft sleeves, carbocycle seal assembly is located and is close to the one end in the casing outside, one side of seal is equipped with the sealed nitrogen gas of carbocycle and inserts the mouth, the bottom that the sealed nitrogen gas of carbocycle inserted the mouth is equipped with the sealed nitrogen gas of carbocycle and inserts the passageway, the sealed nitrogen gas of carbocycle inserts the passageway and extends to a plurality of between the carbocycle seal assembly.

Preferably, the carbon ring sealing assembly is four groups of carbon rings, and the opening of the nitrogen gas access channel sealed by the carbon rings is located between one group of carbon rings close to the inside of the casing and the other three groups of carbon rings.

Preferably, the shaft sleeve is fixed on the main shaft through a shaft sleeve fixing screw.

Preferably, an O-ring is mounted between the sleeve and the main shaft.

Preferably, the part of the shaft sleeve, which is in contact with the carbon ring sealing component, is sprayed with a ceramic coating.

Preferably, the sealing body is divided into an upper lobe and a lower lobe.

According to the technical scheme, the application provides a combined shaft end seal of a gas blower, which comprises a comb tooth system and a carbon ring sealing system, wherein a shaft sleeve is arranged on a main shaft and is positioned and driven by a shaft sleeve fixing screw, an O-shaped ring is arranged in the shaft sleeve to prevent gas from leaking from the shaft sleeve, a carbon ring sealing assembly is provided with a group of carbon rings and is arranged in a carbon ring groove in a sealing body, one group of carbon rings and other three groups of carbon rings are arranged at the side close to a medium and are isolated and sealed by introducing nitrogen through carbon ring sealing nitrogen inlets, a sealing structure which is staggered up and down is formed by a comb tooth sealing sheet and rectangular teeth on the shaft sleeve reduces the pressure of the medium leaking to the atmosphere side, the nitrogen is introduced to comb teeth through the comb tooth sealing nitrogen inlets to improve the sealing effect, and the nitrogen sealing pressure of the comb tooth sealing sheet and the carbon ring sealing assembly can be respectively adjusted by dividing into two channels, the problem that the pressure required by the comb tooth sealing is larger than the pressure required by the carbon ring sealing and cannot be adjusted is solved.

Compared with the prior art, the utility model has the beneficial effects that:

1. through the matching of the carbon ring sealing assembly, the comb tooth sealing piece, the sealing body and the shaft sleeve, the comb tooth sealing is the first-level sealing, so that the coke oven gas containing impurities is effectively isolated through the sealing assembly, the impurity content in the gas is reduced when the coke oven gas passes through the second carbon ring sealing, and the service life of the carbon ring sealing is prolonged;

2. through the setting that the sealed nitrogen gas of broach inserts the mouth and the sealed nitrogen gas of carbocycle inserts the mouth, the sealed nitrogen gas passageway that seals with the broach of carbocycle sets up respectively, can adjust two kinds of sealed nitrogen gas pressures respectively, prevents that nitrogen gas from leaking the too big influence coal gas index of leakage quantity to the coal gas.

In conclusion, the combined shaft end sealing device disclosed by the utility model realizes the sealing effect of combining the two sealing structures of the comb tooth sealing structure and the carbon ring sealing structure, so that the centrifugal gas blower still has a good sealing effect under the conditions that the medium has high moisture content, bonding substances and more dust impurities, and the medium is flammable, explosive and toxic, the gas leakage amount is reduced, the normal use and the personal safety of equipment are ensured, and the maintenance cost is reduced.

Drawings

In order to more clearly illustrate the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.

FIG. 1 is a schematic structural view of a gas blower with a combined shaft end seal of a gas blower according to the present invention;

FIG. 2 is a schematic structural view of a combined shaft end seal of a gas blower according to the present invention;

in the figure: 1 casing, 2 broach seal nitrogen gas access mouth, 3 seals, 4 carbocycle seal nitrogen gas access mouths, 5 axle sleeve set screws, 6 main shafts, 7O shape circle, 8 axle sleeves, 9 carbocycle seal assembly, 10 broach gasket.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.

Referring to fig. 1-2, a combined shaft end seal of a gas blower comprises a casing 1, wherein the casing 1 is a centrifugal gas blower casing and is used for conveying gas, mounting holes are formed in two ends of the casing 1 and are used as shaft seal mounting positions for mounting a main shaft 6 and performing shaft seal, a seal body 3 is mounted in each mounting hole, the seal body 3 is divided into an upper section and a lower section which are convenient to detach and mount, the main shaft 6 is commonly mounted in the two mounting holes and is used for driving a main shaft of a centrifugal machine impeller, shaft sleeves 8 are mounted at two ends of the main shaft 6, the shaft sleeves 8 are mounted on the main shaft 6 and are positioned and driven by shaft sleeve fixing screws 5, so that the abrasion to the main shaft 6 is reduced, the service life of the main shaft 6 is prolonged, an O-shaped ring 7 is mounted between each shaft sleeve 8 and the main shaft 6 to prevent the gas from leaking from the shaft sleeves, the two shaft sleeves 8 are respectively positioned in the two shafts 3 to perform shaft seal to the driving part of the main shaft seal body 6, a comb tooth sealing sheet 10 is arranged between the shaft sleeve 8 and the sealing body 3, the comb tooth sealing sheet 10 is positioned at one end close to the inner wall of the casing 1, the comb tooth sealing sheet 10 and rectangular teeth on the shaft sleeve 8 form a vertically staggered sealing structure to reduce the pressure of medium leakage to the atmosphere side, comb tooth sealing nitrogen gas access passages are jointly arranged on the casing 1 and the sealing body 3 to facilitate the introduction of nitrogen gas into the sealing body 3, one end of the comb tooth sealing nitrogen gas access passage, which is positioned at the casing 1, is provided with a comb tooth sealing nitrogen gas access port 2, which is connected with an external nitrogen gas supply device through the comb tooth sealing nitrogen gas access port 2, one end of the sealing body 3 extends to the comb tooth sealing sheet 10, the comb tooth sealing sheet 10 introduces nitrogen gas for isolation to improve the sealing effect, a plurality of carbon ring sealing components 9 are also arranged between the sealing body 3 and the shaft sleeve 8, the sealing performance is good, and the influence on the transmission resistance is small, the carbocycle seal assembly 9 is located at one end close to the outer side of the machine shell 1, the part of the shaft sleeve 8, which is in seal contact with the carbocycle, is coated with a wear-resistant and smooth ceramic coating to prevent the carbocycle from being worn and damaged by long-time friction of the carbocycle and the shaft sleeve 8, one side of the seal body 3 is provided with a carbocycle seal nitrogen inlet 4, the bottom of the carbocycle seal nitrogen inlet 4 is provided with a carbocycle seal nitrogen inlet channel, the carbocycle seal nitrogen inlet channel extends to the space between a plurality of carbocycle seal assemblies 9, nitrogen is introduced to be isolated and sealed, the nitrogen enters the seal body to be divided into two channels, one channel is used for isolating the comb tooth sealing piece 10, the other channel is used for isolating the carbon ring sealing assembly 9, the nitrogen sealing pressure of the comb tooth seal and the carbon ring seal can be respectively adjusted by dividing the two channels, and the problem that the pressure required by the comb tooth seal is greater than the pressure required by the carbon ring seal and cannot be adjusted is solved.

In the utility model, the carbon ring sealing component 9 is four groups of carbon rings, the sealing performance is good, and the opening of the carbon ring sealing nitrogen access channel is positioned between one group of carbon rings and other three groups of carbon rings close to the inside of the casing 1, so that higher nitrogen pressure can be provided for the carbon rings positioned at the inner side, the leakage of gas is reduced, and the carbon rings are protected at the same time.

According to the technical scheme, when in use, the comb tooth type comb tooth device is composed of a comb tooth system and a carbon ring sealing system, a shaft sleeve 8 is arranged on a main shaft 6, positioning and transmission are carried out by a shaft sleeve fixing screw 5, an O-shaped ring 7 is arranged in the shaft sleeve 8 to prevent gas from leaking from the shaft sleeve 8, 4 groups of carbon rings are arranged in the carbon ring sealing component 9 and are arranged in a carbon ring groove in the sealing body 3, a group of comb tooth sealing pieces 10 and rectangular teeth on the shaft sleeve 8 form a vertically staggered sealing structure to reduce the pressure of the medium leaking to the atmosphere side, simultaneously, the nitrogen inlet 2 is sealed by the comb teeth, nitrogen is introduced into the comb teeth to improve the sealing effect, the nitrogen sealing pressure of the comb tooth sealing piece 10 and the carbon ring sealing assembly 9 can be respectively adjusted by dividing two channels, and the problem that the pressure required by the sealing of the comb teeth is greater than the pressure required by the sealing of the carbon ring and cannot be adjusted is solved.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims.

It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The above-described embodiments of the present application do not limit the scope of the present application.

Claims (6)

1. The combined shaft end seal of the gas blower comprises a shell (1) and is characterized in that: the comb-shaped sealing device is characterized in that mounting holes are formed in two ends in the machine shell (1), seals (3) are mounted in the mounting holes, a main shaft (6) is mounted in two mounting holes, shaft sleeves (8) are mounted at two ends of the main shaft (6), the two shaft sleeves (8) are respectively located in the two seals (3), comb sealing sheets (10) are arranged between the shaft sleeves (8) and the seals (3), the comb sealing sheets (10) are located at one end close to the inner wall of the machine shell (1), comb sealing nitrogen access channels are arranged on the machine shell (1) and the seals (3) together, comb sealing nitrogen access channels are located at one end of the machine shell (1) and are provided with comb sealing nitrogen access ports (2), and one ends of the seals (3) extend to the comb sealing sheets (10), the utility model discloses a machine shell, including casing (1), seal (3) and shaft sleeve (8), still be equipped with a plurality of carbocycle seal assembly (9) between seal (3) and shaft sleeve (8), carbocycle seal assembly (9) are located and are close to the one end in casing (1) outside, one side of seal (3) is equipped with the sealed nitrogen gas of carbocycle and inserts mouth (4), the bottom that the sealed nitrogen gas of carbocycle inserts mouth (4) is equipped with the sealed nitrogen gas of carbocycle and inserts the passageway, the sealed nitrogen gas of carbocycle inserts the passageway and extends to a plurality of between carbocycle seal assembly (9).

2. The combined shaft end seal of a gas blower according to claim 1, characterized in that the carbon ring seal assembly (9) is four carbon rings, and the opening of the nitrogen gas inlet channel is located between one carbon ring and the other three carbon rings near the inside of the housing (1).

3. The combined shaft end seal of a gas blower according to claim 1, characterized in that said sleeve (8) is fixed to said main shaft (6) by means of a sleeve fixing screw (5).

4. -combined shaft end seal for gas blowers according to claim 1, characterized in that an O-ring (7) is mounted between the sleeve (8) and the main shaft (6).

5. The combined shaft end seal of a gas blower as claimed in claim 1, wherein the area of the bushing (8) in contact with the carbocyclic ring seal (9) is coated with a ceramic coating.

6. The combined shaft end seal of a gas blower according to claim 1, characterized in that the sealing body (3) is divided into an upper flap and a lower flap.

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