CN217327796U - High-temperature coal gas draught fan - Google Patents
High-temperature coal gas draught fan Download PDFInfo
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- CN217327796U CN217327796U CN202220432213.1U CN202220432213U CN217327796U CN 217327796 U CN217327796 U CN 217327796U CN 202220432213 U CN202220432213 U CN 202220432213U CN 217327796 U CN217327796 U CN 217327796U
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Abstract
The utility model relates to the technical field of high-temperature gas draught fans, and discloses a high-temperature gas draught fan, which comprises a main shaft and a fan component arranged on the main shaft, wherein a gas outlet sealing end cover is arranged on one side of an air outlet on a shell component, a first-stage gas outlet sealing component and a second-stage gas outlet sealing component are sequentially arranged between the gas outlet sealing end cover and the main shaft along the gas outlet direction, the first-stage gas outlet sealing component comprises a first-stage static seal and a first-stage dynamic seal, communicated gas outlet sealing channels are respectively arranged on the gas outlet sealing end cover and the first-stage static seal, the gas outlet sealing channels are communicated with a sealing matching surface between the first-stage static seal and the first-stage dynamic seal, multiple seals are formed by utilizing the matching of the first-stage gas outlet sealing component and the second-stage gas outlet sealing component, and the gas sealing effect can be realized by introducing nitrogen gas into the gas outlet sealing channels while the whole sealing effect of the fan is improved, further the sealing effect of the air sealing component.
Description
Technical Field
The utility model relates to a fan technical field, concretely relates to high temperature coal gas draught fan.
Background
The gas blower is a special power device for conveying gas in the process of purifying the coke oven gas, and is generally arranged at the tail end of a gas purification process after the coke oven gas is initially cooled.
The gas blower is mainly used for conveying and pressurizing gas and the like. The method has wide application in the industries of coke oven gas, converter gas and calcium carbide flue gas. The gas blower has single machine, multiple stages, speed increasing and other forms, and the bearing includes rolling bearing and sliding bearing.
Because of energy enterprise productivity structural adjustment, the consumption of smelting furnace is more and more high, and the gas production volume crescent to high temperature coal gas draught fan keeps keeping high temperature in the inside temperature of fan in the use, leads to the fan casing to produce deformation, and then leads to producing the fan between the adapting unit of fan, when leading to the fan to take place to leak gas, coal gas in the high temperature coal gas draught fan meets the outside air and very easily causes the burning explosion taking place to reveal the in-process.
Therefore, there is a need for a high temperature gas induced draft fan which avoids the above problems during use.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high temperature coal gas draught fan.
The utility model discloses a following technical scheme realizes: a high-temperature coal gas induced draft fan comprises a main shaft and a fan assembly arranged on the main shaft;
the fan assembly comprises a shell assembly and an impeller assembly arranged in the shell assembly, and the shell assembly is provided with an air inlet and an air outlet respectively;
the air outlet sealing device is characterized in that an air outlet sealing end cover is arranged on one side of the air outlet on the shell assembly, a primary air outlet sealing assembly and a secondary air outlet sealing assembly are sequentially arranged between the air outlet sealing end cover and the main shaft along the air outlet direction, the primary air outlet sealing assembly comprises a primary static seal and a primary dynamic seal, the primary static seal is fixedly arranged on the air outlet sealing end cover, the air outlet sealing end cover and the primary static seal are respectively provided with an air outlet sealing channel communicated with each other, and the air outlet sealing channel is communicated to a sealing matching surface between the primary static seal and the primary dynamic seal.
In the use process of the utility model, because the air pressure at one side of the air outlet on the shell component is higher than the air pressure at one side of the air inlet, in order to prevent the shell component from leaking at one side of the air outlet, an air outlet sealing end cover is arranged at one side of the air outlet on the shell component, and two-stage sealing is arranged for sealing so as to improve the sealing performance at the side; and, the utility model discloses in through setting up the sealed end cover subassembly of giving vent to anger, all set up the sealed end cover of giving vent to anger with the two-stage is sealed, can make things convenient for the sealed installation of two-stage and dismantle, whole seal structure is simpler, the convenient maintenance to the draught fan.
In order to realize better the utility model discloses, furtherly, it is provided with one-level seal installation department and second grade seal installation department on the sealed end cover to give vent to anger respectively, it is provided with transition portion to be located between one-level seal installation department and the second grade seal installation department on the sealed end cover to give vent to anger, transition portion is cavity structure on the sealed end cover of giving vent to anger, it forms confined transition chamber at the transition portion between the sealed subassembly to give vent to anger sealed end cover, one-level seal assembly and the second grade seal assembly of giving vent to anger.
The utility model discloses well one-level seal assembly that gives vent to anger adopts nitrogen gas sealed, gives vent to anger through one-level seal assembly and the second grade and sets up the transition chamber between the seal assembly that gives vent to anger, gives vent to anger the nitrogen gas that seal assembly revealed from the one-level and enters into the transition intracavity, forms certain atmospheric pressure in the confined transition intracavity to can play better sealed effect.
In order to realize better the utility model discloses, furtherly, the transition chamber is annular cross section, the transition chamber leans on the cavity court of outer ring one side the second grade is given vent to anger the setting of seal assembly direction protrusion.
The utility model discloses in the use, set up through the structure to the transition chamber, further increase the volume of giving vent to anger sealed end cover and going up the transition chamber cavity, form pressure differential in the transition chamber, supplementary one-level seal assembly and the second grade seal assembly that gives vent to anger play better sealed effect.
In order to realize better the utility model discloses, furtherly, the diameter of one-level seal installation department is greater than the diameter of second grade seal installation department, the diameter of transition portion is greater than the diameter of one-level seal installation department.
The utility model discloses in the use, the diameter of transition portion is greater than the diameter of one-level seal installation department makes nitrogen gas in the transition chamber can cover the one-level static seal with the quiet sealed connecting portion of second grade to ensure the sealed effect of nitrogen gas.
In order to better realize the utility model discloses, furtherly, the sealed passageway of giving vent to anger on the one-level static seal sets up to be close to the second grade is given vent to anger seal assembly one side.
The utility model discloses in the use, let in the in-process of nitrogen gas in the sealed passageway, nitrogen gas is in the one-level static seal with when one-level movive seal's connecting portion formed gas seal, partial nitrogen gas can flow in the transition intracavity, the nitrogen gas of transition intracavity is given vent to anger simultaneously for the second grade and is sealed subassembly and provide nitrogen gas, and it is sealed to form two-stage nitrogen gas on the sealed end cover of giving vent to anger, improves the sealed effect of the sealed end cover one side of giving vent to anger.
In order to realize better the utility model discloses, furtherly, the second grade is given vent to anger seal assembly and is included second grade static seal and second grade moving seal, sealed cooperation forms sealed vice between second grade static seal and the second grade moving seal.
The utility model discloses in the use, sealed end cover of giving vent to anger utilizes when the one-level sealed subassembly of giving vent to anger and nitrogen gas sealing device ensure the leakproofness give vent to anger and add on the sealed end cover of giving vent to anger the second grade is given vent to anger sealedly, forms a plurality of sealed pairs, further improves the whole sealed effect of the airtight end cover of going out.
In order to better realize the utility model discloses, furtherly, it is whole casting shaping that the airtight end cover of going out. The air outlet sealing end cover needs to continuously maintain the sealing effect on the shell assembly in a high-temperature environment, and is of an integral casting forming structure so as to improve the thermal fatigue resistance of the air outlet sealing end cover.
In order to better realize the utility model, furthermore, an air inlet sealing end cover is arranged on one side of the air inlet on the shell component, and an air inlet sealing component is arranged between the air inlet sealing end cover and the main shaft;
the air inlet sealing assembly comprises an air inlet static seal and an air inlet dynamic seal, the air inlet static seal and the air inlet dynamic seal are in sealing fit to form a sealing pair, the air inlet static seal is fixedly arranged on the air inlet sealing end cover, communicated air inlet sealing channels are respectively arranged on the air inlet sealing end cover and the air inlet static seal, the air inlet sealing channels are communicated to a sealing fit surface between the air inlet static seal and the air inlet dynamic seal, and the air inlet sealing channels on the air inlet static seal are arranged at the position, close to the middle, of the air inlet static seal.
The utility model discloses in the use, utilize the air intake seal end cover prevents the casing subassembly is in air intake one side takes place to leak gas, utilizes set up on the air intake seal end cover static seal and the air intake air-operated seal of admitting air to combine nitrogen gas sealing device to improve the holistic sealed effect of air intake seal end cover.
In order to better implement the present invention, further, the housing assembly includes an air inlet portion, a cavity portion, and an air outlet portion;
the gas inlet part, the cavity part and the gas outlet part are all of frame plate welding forming structures, a first isolation assembly and a second isolation assembly are sequentially arranged in the cavity part along the gas flowing direction, and the first isolation assembly and the second isolation assembly divide the interior of the cavity part into a primary cavity, a middle transition cavity and a secondary cavity which are sequentially communicated;
an annular first frame body is arranged at the air outlet end of the primary cavity on the first isolation assembly, the first frame body is arranged in a protruding mode towards one side of the primary cavity, and a primary air outlet channel is formed between the first frame body and the cavity;
and annular second frame bodies are respectively arranged at the air outlet ends in the secondary cavity on the second isolation component and the inner wall of the cavity part, and the second frame bodies are arranged in a relatively protruding manner to form a secondary air outlet channel.
The utility model discloses a casing subassembly adopts deckle board welded structure, and casing subassembly has improved casing subassembly's sealing performance when having better structural strength, prevents that casing subassembly from the problem of gas leakage appearing in the junction. Meanwhile, the shell assembly is welded by adopting the frame plate, the shell assembly is convenient to manufacture and process, and the design of a cavity structure in the shell assembly is facilitated.
The cavity part of the shell assembly is divided into a plurality of cavities by the first isolation assembly and the second isolation assembly, and the first isolation assembly and the second isolation assembly are more convenient to arrange as the shell assembly is formed by welding; the first frame body is arranged at the air outlet end in the primary cavity, so that the sectional area of the primary cavity at the air outlet end is reduced, and the pressurization treatment effect in the primary cavity is further improved; similarly, the second frame is arranged at the air outlet end of the secondary chamber, so that the pressurization treatment effect in the secondary chamber is further increased. Meanwhile, the first frame body and the second frame body are formed by welding frame plates, so that the weight of the shell assembly can be reduced to a certain extent.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
(1) the air outlet end cover is arranged on one side of the air outlet on the shell component, and two-stage sealing is arranged for sealing so as to improve the sealing performance on the side; and, the utility model discloses in through setting up the sealed end cover subassembly of giving vent to anger, all set up the sealed end cover of giving vent to anger with the two-stage is sealed, can make things convenient for the sealed installation of two-stage and dismantle, whole seal structure is simpler, the convenient maintenance to the draught fan.
(2) The air outlet sealing end cover needs to continuously maintain the sealing effect on the machine shell assembly in a high-temperature environment, and is of an integral casting molding structure, so that the thermal fatigue resistance of the air outlet sealing end cover is improved.
(3) Utilize the airtight end cover of admitting air prevents the casing subassembly is in air leakage takes place for one side of air intake, utilize set up on the airtight end cover of admitting air static seal and the air inlet dynamic seal of admitting air to combine nitrogen gas sealing device to improve the holistic sealed effect of airtight end cover of admitting air.
(4) The utility model discloses a casing subassembly adopts deckle board welded structure, and casing subassembly has improved casing subassembly's sealing performance when having better structural strength, prevents that casing subassembly from the problem of gas leakage appearing in the junction. Meanwhile, the shell assembly is welded by the frame plates, the shell assembly is convenient to manufacture and process, and the design of a cavity structure in the shell assembly is facilitated.
Drawings
The present invention will be further explained with reference to the following drawings and examples, and all the innovative ideas of the present invention shall be considered as the disclosure and the protection scope of the present invention.
Fig. 1 is a structural sectional view of an embodiment of a high-temperature gas induced draft fan.
Fig. 2 is a schematic view of the overall structure of a high-temperature coal gas induced draft fan.
FIG. 3 is a sectional view of the structure of the intake seal assembly of the intake seal end cap.
Fig. 4 is a structural section view of the air outlet sealing end cover and the air outlet sealing assembly.
Fig. 5 is a structural sectional view of the air outlet end cover.
Wherein: the device comprises a shell component 1, a main shaft 2, a gas outlet sealing end cover 3, a gas inlet sealing end cover 4, a gas outlet sealing component 5, a primary gas outlet sealing component 6, a secondary gas outlet sealing component 7, a gas inlet sealing component 8, a gas outlet sealing channel 9, a gas inlet sealing channel 10, a transition cavity 11, an impeller component 12, a first isolation component 13, a secondary isolation component 13, a primary sealing installation part 301, a secondary sealing installation part 302, a transition part 303, a primary static seal 501, a primary dynamic seal 502, a secondary static seal 601, a secondary dynamic seal 602, a gas inlet static seal 701 and a gas inlet dynamic seal 702.
Detailed Description
Example 1:
the high-temperature coal gas induced draft fan of the embodiment, as shown in fig. 1-5, comprises a main shaft 2 and a fan assembly arranged on the main shaft 2;
the fan assembly comprises a shell assembly 1 and an impeller assembly 11 arranged in the shell assembly 1, wherein an air inlet and an air outlet are respectively formed in the shell assembly 1;
the shell assembly 1 is provided with an air outlet sealing end cover 3 on one side of an air outlet, a first-stage air outlet sealing assembly 5 and a second-stage air outlet sealing assembly 6 are sequentially arranged between the air outlet sealing end cover 3 and the main shaft 2 along an air outlet direction, the first-stage air outlet sealing assembly 5 comprises a first-stage static seal 501 and a first-stage dynamic seal 502, a sealing pair is formed by sealing and matching the first-stage static seal 501 and the first-stage dynamic seal 502, the first-stage static seal 501 is fixedly arranged on the air outlet sealing end cover 3, air outlet sealing channels 8 communicated with the air outlet sealing end cover 3 and the first-stage static seal 501 are respectively arranged on the air outlet sealing end cover 3 and the first-stage static seal 501, and the air outlet sealing channels 8 are communicated to a sealing matching surface between the first-stage static seal 501 and the first-stage dynamic seal 502.
Further, be provided with one-level seal installation department 301 and second grade seal installation department 302 on going out the gas seal end cover 3 respectively, it is provided with transition portion 303 to lie in between one-level seal installation department 301 and the second grade seal installation department 302 on going out the gas seal end cover 3, transition portion 303 is the cavity structures on the sealed end cover 3 of giving vent to anger, it forms confined transition chamber 10 at transition portion 303 between the sealed subassembly 6 of giving vent to anger to go out gas seal end cover 3, one-level seal assembly 5 and the second grade.
In the use process of the utility model, the air outlet seal end cover 3 is arranged on the connecting part of the main shaft 2 and the air outlet side of the shell component 1, the first-stage air outlet seal component 5 and the second-stage air outlet seal component 6 which are used for connecting the main shaft 2 are arranged on the air outlet seal end cover 3, the first-stage air outlet seal component 5 comprises the first-stage static seal 501 and the first-stage dynamic seal 502, the air outlet seal end cover 3 and the first-stage static seal 501 are provided with communicated air outlet seal channels 8, the air outlet seal channels 8 are communicated with the seal matching surface between the first-stage static seal 501 and the first-stage dynamic seal 502, nitrogen is introduced into the air outlet seal channels 8 to realize the nitrogen sealing effect of the air outlet seal end cover 3, a transition cavity 10 is arranged between the first-stage air outlet seal component 5 and the second-stage air outlet seal component 6 on the air outlet seal end cover 3, by utilizing the matching of the transition cavity 10 and the air outlet sealing channel 8, nitrogen introduced through the air outlet sealing channel 8 flows into the transition cavity 10, and high-pressure airflow is formed in the transition cavity 10 after the nitrogen continuously flows in, so that the airflow in the shell assembly 1 is prevented from leaking at the air outlet sealing end cover 3 in the operation process of the fan.
Example 2:
the embodiment is further optimized on the basis of embodiment 1, as shown in fig. 5, the transition cavity 10 is an annular cross section, and the cavity on the side of the transition cavity 10 close to the outer ring is arranged to protrude toward the direction of the secondary outlet sealing assembly 6.
Further, the diameter of the primary seal installation part 301 is greater than that of the secondary seal installation part 302, and the diameter of the transition cavity 10 is greater than that of the primary seal installation part 301.
The utility model discloses in the use, set up through the structure to die cavity 10, further increase out the volume of die cavity 10 cavitys on the airtight end cover 3, form pressure differential in die cavity 10, supplementary one-level seal assembly 5 and the second grade seal assembly 6 of giving vent to anger play better sealed effect.
Other parts of this embodiment are the same as embodiment 1, and thus are not described again.
Example 3:
the present embodiment is further optimized on the basis of the above embodiment 1, and the outlet sealing channel 8 on the primary static seal 501 is disposed on a side close to the secondary outlet sealing component 6.
Further, the secondary outlet sealing assembly 6 comprises a secondary static seal 601 and a secondary dynamic seal 602, and the secondary static seal 601 and the secondary dynamic seal 602 are in sealing fit to form a sealing pair.
This embodiment is in the use, the diameter of transition chamber 10 is greater than the diameter of one-level seal installation department 301 let in the in-process of nitrogen gas in the transition chamber 10, in order to ensure the transition chamber 10 is right go out the sealed effect of airtight end cover 3, the diameter of transition chamber 10 is greater than during the diameter of one-level seal installation department 301, nitrogen gas in the transition chamber 10 can be right go out the connecting portion between airtight end cover 3 and other chain parts, prevent the fan is in the operation in the junction between airtight end cover 3 and other connecting parts takes place to leak gas. Furthermore, the sealing channel is arranged at one side close to the secondary air outlet sealing component 6, so that nitrogen introduced through the sealing channel can flow into the transition cavity 10, and the sealing effect of the primary air outlet sealing and the secondary air outlet sealing is formed. Further, the secondary air outlet sealing assembly 6 comprises a secondary static seal 601 and a secondary dynamic seal 602, and a group of sealing pairs are added on the basis of nitrogen sealing to improve the overall sealing effect of the sealing assembly.
The rest of this embodiment is the same as embodiment 1 or 2, and therefore, the description thereof is omitted.
Example 4:
the present embodiment is further optimized on the basis of the above embodiment 1, and the air outlet sealing end cover 3 is integrally cast and molded.
In the use process, the embodiment further works as in-process that lets in high temperature coal gas in the fan, go out airtight end cover 3 can receive high temperature gas's influence, and the sealed end cover of traditional material lasts to switch in high temperature and normal atmospheric temperature environment and can lead to the damage of end cover itself, and then can't realize right the leakproofness of fan utilizes the high characteristics of heat fatigue resistance of cast iron material, will go out airtight end cover 3 and adopt whole casting shaping, improves when going out airtight end cover 3's life improve sealed effect of sealed end cover.
Other parts of this embodiment are the same as any of embodiments 1 to 3, and thus are not described again.
Example 5:
in this embodiment, a further optimization is performed on the basis of any one of the embodiments 1 to 4, wherein an air inlet sealing end cover 4 is arranged on one side of the air inlet of the housing assembly 1, and an air inlet sealing assembly 7 is arranged between the air inlet sealing end cover 4 and the main shaft 2;
the air inlet seal assembly 7 comprises an air inlet static seal 701 and an air inlet dynamic seal 702, the air inlet static seal 701 and the air inlet dynamic seal 702 are in sealing fit to form a seal pair, the air inlet static seal 701 is fixedly arranged on the air inlet seal end cover 4, the air inlet seal end cover 4 and the air inlet static seal 701 are respectively provided with a communicated air inlet seal channel 9, the air inlet seal channel 9 is communicated with a seal fit surface between the air inlet static seal 701 and the air inlet dynamic seal 702, and the air inlet seal channel 9 on the air inlet static seal 701 is arranged at a position close to the middle of the air inlet static seal 701.
The utility model discloses in the use, the fan is whole to be single-suction double bracing structure, is being close to fan air inlet one side is provided with air intake seal end cover 4, air intake seal end cover 4 with main shaft 2 adopts air intake seal assembly 7 is connected, air intake seal assembly 7 is including air intake static seal 701 with the dynamic seal 702 admits air, air intake seal end cover 4 with be provided with plum Tong's the sealed passageway 9 that admits air on the static seal 701, utilize admit air static seal 701 with admit air the sealed vice of dynamic seal 702 formation with the sealed cooperation of the sealed passageway 9 that admits air improves air intake seal end cover 4's leakproofness.
Other parts of this embodiment are the same as any of embodiments 1 to 4, and thus are not described again.
Example 6:
this embodiment is further optimized on the basis of any one of the above embodiments 1 to 5, as shown in fig. 1, the housing assembly 1 includes an air inlet portion, a cavity portion, and an air outlet portion;
the gas inlet part, the cavity part and the gas outlet part are all of frame plate welding forming structures, a first isolation assembly 12 and a second isolation assembly 13 are sequentially arranged in the cavity part along the gas flowing direction, and the first isolation assembly 12 and the second isolation assembly 13 divide the interior of the cavity part into a first-stage cavity, a middle transition cavity and a second-stage cavity which are sequentially communicated;
an annular first frame body is arranged at the air outlet end of the primary cavity on the first isolation assembly 12, the first frame body is arranged in a protruding mode towards one side of the primary cavity, and a primary air outlet channel is formed between the first frame body and the cavity;
and annular second frame bodies are respectively arranged at the air outlet end in the secondary cavity on the secondary isolation component and the inner wall of the cavity part, and the second frame bodies are arranged in a relatively protruding manner to form a secondary air outlet channel.
In the using process of the utility model, the shell component 1 is made by welding steel plates, on the basis that the shell component 1 is made by welding steel plates, the first isolation component 12 and the second isolation component 13 are arranged in the shell, the first isolation component 12 and the second isolation component 13 are used for dividing the interior of the shell into a first-stage cavity, a middle transition cavity and a second-stage cavity, the impeller component 11 is used for pressurizing in the process of air flow passing through the first-stage cavity and the middle transition cavity, the first frame body is arranged on the first isolation component 12, the first-stage air outlet channel formed between the first frame body and the cavity part is used for guiding the air flow flowing out from one side of the air outlet of the first-stage cavity, and the second frame body which is arranged on the inner walls of the second-stage isolation component and the cavity part and is positioned at the air outlet end in the second-stage cavity, will the air current that transition cavity air outlet one side flows carries out the water conservancy diversion, in order to ensure when the holistic operating efficiency of fan, the one-level air-out passageway with the second grade air-out passageway carries out the water conservancy diversion effect to the pressure boost air current, reduces the casing with the gas pressure of 2 connecting portions of main shaft, improved the holistic leakproofness of fan, have better practicality.
Other parts of this embodiment are the same as any of embodiments 1 to 5, and thus are not described again.
The above, only be the preferred embodiment of the present invention, it is not right the utility model discloses do the restriction in any form, all be according to the utility model discloses a technical entity is any simple modification, the equivalent change of doing to above embodiment, all fall into within the protection scope of the utility model.
Claims (9)
1. A high-temperature coal gas induced draft fan is characterized by comprising a main shaft (2) and a fan assembly arranged on the main shaft (2);
the fan assembly comprises a shell assembly (1) and an impeller assembly (11) arranged in the shell assembly (1), wherein an air inlet and an air outlet are respectively formed in the shell assembly (1);
it is provided with out gas seal end cover (3) to lie in air outlet one side on casing subassembly (1), go out gas seal end cover (3) with it gives vent to anger seal assembly (5) and second grade gas seal assembly (6) to have set gradually along the direction of giving vent to anger between main shaft (2) one-level gas seal assembly (5) and give vent to anger to give vent to anger, one-level gas seal assembly (5) are including one-level static seal (501) and one-level dynamic seal (502), one-level static seal (501) are fixed to be set up on going out gas seal end cover (3), go out gas seal end cover (3) with be provided with the sealed passageway (8) of giving vent to anger of intercommunication on one-level static seal (501) respectively, sealed passageway (8) of giving vent to anger communicate one-level static seal (501) with the sealed fitting surface between one-level dynamic seal (502).
2. The high-temperature coal gas draught fan according to claim 1, wherein a primary seal installation part (301) and a secondary seal installation part (302) are respectively arranged on the air outlet seal end cover (3), a transition part (303) is arranged between the primary seal installation part (301) and the secondary seal installation part (302) on the air outlet seal end cover (3), and a closed transition cavity (10) is formed between the transition part (303) and the air outlet seal assembly (5) and the air outlet seal assembly (6) on the air outlet seal end cover, the primary air outlet seal assembly and the secondary air outlet seal assembly.
3. The high-temperature coal gas induced draft fan according to claim 2, wherein the transition cavity (10) is of an annular cross section, and a cavity of the transition cavity (10) close to one side of the outer ring protrudes towards the direction of the secondary air outlet sealing assembly (6).
4. The high-temperature coal gas draught fan according to claim 2, wherein the diameter of the primary seal installation portion (301) is larger than that of the secondary seal installation portion (302), and the diameter of the transition cavity (10) is larger than that of the primary seal installation portion (301).
5. The high-temperature coal gas induced draft fan according to claim 4, wherein the air outlet sealing channel (8) on the primary static seal (501) is arranged on one side close to the secondary air outlet sealing component (6).
6. The high-temperature coal gas induced draft fan according to claim 1, wherein the secondary air outlet sealing assembly (6) comprises a secondary static seal (601) and a secondary dynamic seal (602), and a sealing pair is formed by sealing and matching the secondary static seal (601) and the secondary dynamic seal (602).
7. The high-temperature coal gas induced draft fan according to claim 1, wherein the air outlet sealing end cover (3) is integrally cast and formed.
8. The high-temperature coal gas induced draft fan according to claim 1, wherein an air inlet sealing end cover (4) is arranged on one side of the air inlet of the shell assembly (1), and an air inlet sealing assembly (7) is arranged between the air inlet sealing end cover (4) and the main shaft (2);
the air inlet sealing assembly (7) comprises an air inlet static seal (701) and an air inlet dynamic seal (702), the air inlet static seal (701) and the air inlet dynamic seal (702) are in sealing fit to form a sealing pair, the air inlet static seal (701) is fixedly arranged on the air inlet sealing end cover (4), communicated air inlet sealing channels (9) are respectively arranged on the air inlet sealing end cover (4) and the air inlet static seal (701), the air inlet sealing channels (9) are communicated to a sealing fit surface between the air inlet static seal (701) and the air inlet dynamic seal (702), and the air inlet sealing channels (9) on the air inlet static seal (701) are arranged at positions, close to the middle, of the air inlet static seal (701).
9. The high-temperature coal gas induced draft fan according to claim 1, wherein the shell assembly (1) comprises an air inlet part, a cavity part and an air outlet part;
the gas inlet part, the cavity part and the gas outlet part are all of frame plate welding forming structures, a first isolation assembly (12) and a second isolation assembly (13) are sequentially arranged in the cavity part along the gas flowing direction, and the first isolation assembly (12) and the second isolation assembly (13) divide the interior of the cavity part into a first-stage cavity, a middle transition cavity and a second-stage cavity which are sequentially communicated;
an annular first frame body is arranged at the air outlet end of the primary cavity on the first isolation assembly (12), the first frame body is arranged in a protruding mode towards one side of the primary cavity, and a primary air outlet channel is formed between the first frame body and the cavity;
and annular second frame bodies are respectively arranged at the air outlet end in the secondary cavity on the secondary isolation component and the inner wall of the cavity part, and the second frame bodies are arranged in a relatively protruding manner to form a secondary air outlet channel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220432213.1U CN217327796U (en) | 2022-02-28 | 2022-02-28 | High-temperature coal gas draught fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220432213.1U CN217327796U (en) | 2022-02-28 | 2022-02-28 | High-temperature coal gas draught fan |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217327796U true CN217327796U (en) | 2022-08-30 |
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ID=83000159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220432213.1U Active CN217327796U (en) | 2022-02-28 | 2022-02-28 | High-temperature coal gas draught fan |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217327796U (en) |
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2022
- 2022-02-28 CN CN202220432213.1U patent/CN217327796U/en active Active
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