CN111188789A - Centrifugal fan with shaft end sealing device capable of adapting to thermal deformation of casing - Google Patents
Centrifugal fan with shaft end sealing device capable of adapting to thermal deformation of casing Download PDFInfo
- Publication number
- CN111188789A CN111188789A CN202010074012.4A CN202010074012A CN111188789A CN 111188789 A CN111188789 A CN 111188789A CN 202010074012 A CN202010074012 A CN 202010074012A CN 111188789 A CN111188789 A CN 111188789A
- Authority
- CN
- China
- Prior art keywords
- connecting piece
- shell
- soft connecting
- cylindrical soft
- main shaft
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/102—Shaft sealings especially adapted for elastic fluid pumps
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D17/00—Radial-flow pumps, e.g. centrifugal pumps; Helico-centrifugal pumps
- F04D17/08—Centrifugal pumps
- F04D17/16—Centrifugal pumps for displacing without appreciable compression
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/08—Sealings
- F04D29/10—Shaft sealings
- F04D29/12—Shaft sealings using sealing-rings
- F04D29/122—Shaft sealings using sealing-rings especially adapted for elastic fluid pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D29/00—Details, component parts, or accessories
- F04D29/60—Mounting; Assembling; Disassembling
- F04D29/62—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps
- F04D29/624—Mounting; Assembling; Disassembling of radial or helico-centrifugal pumps especially adapted for elastic fluid pumps
- F04D29/626—Mounting or removal of fans
Abstract
The invention provides a centrifugal fan with a shaft end sealing device capable of adapting to thermal deformation of a shell, and solves the problems that the sealing failure of shaft end sealing and damage to a rotor are easily caused by thermal displacement of the shell in the working process of the conventional fan. The ventilator comprises a shell, a bearing box base, a main shaft and shaft end sealing devices respectively arranged at two end parts of the main shaft; the shaft end sealing device comprises a sealing element, a supporting plate, a fixing plate and a cylindrical soft connecting piece, wherein the fixing plate and the cylindrical soft connecting piece are positioned between the sealing element and the shell; the supporting plate is fixed on the bearing box base and extends to the direction of the shell; the fixing plate is sleeved on the main shaft in a clearance fit manner and is fixed above the supporting plate; the fixing plate is connected with the sealing element in a sealing way; the cylindrical soft connecting piece is sleeved on the main shaft, one end of the cylindrical soft connecting piece is hermetically connected with the fixed plate, and the other end of the cylindrical soft connecting piece is hermetically connected with the machine shell; a cavity structure is arranged between the cylindrical soft connecting piece and the main shaft.
Description
Technical Field
The invention relates to a centrifugal fan in the field of power engineering fluid machinery, in particular to a centrifugal fan with a shaft end sealing device capable of adapting to the thermal deformation of a shell.
Background
The centrifugal fan is one of main corollary equipment of sintering system, coke oven flue gas purification system, dust pelletizing system, etc. If the publication number is 205154671U, the patent name is Chinese patent of a centrifugal ventilator for a vertical furnace sintering machine in metallurgical industry, the fan comprises a shell, the two sides of the shell are provided with air inlet chambers, the inner sides of the two air inlet chambers are connected with an air inlet of the fan, the outer sides of the two air inlet chambers are provided with supports, the supports are arranged on a base (namely a base of a bearing box), a rotor (namely a main shaft) is arranged between the two supports, and the two ends of the rotor are both connected with the shell through shaft end seals for sealing. Because the medium in the systems such as sintering system, coke oven gas cleaning system, dust pelletizing system is high temperature flue gas mostly, the supporting axle head seal of fan is installed under the cold state, and the fan is when the thermal load operation, and the casing can take place the heat altered shape, produces certain thermal displacement volume, and the sealed clearance adjustment is improper, leads to sealed tooth (or the carbocycle) and the rotor of axle head seal to produce the friction, easily makes the sealed inefficacy of axle head seal to lead to the fact the damage to the rotor.
Disclosure of Invention
The invention provides a centrifugal fan with a shaft end sealing device capable of adapting to the thermal deformation of a shell, and aims to solve the technical problems that the sealing failure of a shaft end seal and the damage to a rotor are easily caused due to the thermal displacement of the shell in the working process of the conventional fan.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
a centrifugal fan with a shaft end sealing device capable of adapting to the thermal deformation of a shell comprises the shell, a bearing box base, a main shaft and shaft end sealing devices, wherein the shaft end sealing devices are respectively arranged at two end parts of the main shaft and are connected with the shell; the shaft end sealing device comprises a sealing element; it is characterized in that:
the shaft end sealing device also comprises a supporting plate, a fixing plate and a cylindrical soft connecting piece, wherein the fixing plate and the cylindrical soft connecting piece are positioned between the sealing element and the shell;
the supporting plate is fixed on the bearing box base and extends to the direction of the shell;
the fixing plate is sleeved on the main shaft in a clearance fit manner and is fixed above the supporting plate;
the fixing plate is in sealing connection with the sealing element;
the cylindrical soft connecting piece is sleeved on the main shaft, one end of the cylindrical soft connecting piece is hermetically connected with the fixed plate, and the other end of the cylindrical soft connecting piece is hermetically connected with the shell; a cavity structure is arranged between the cylindrical soft connecting piece and the main shaft.
Further, the sealing element is a carbon ring seal which is coaxially sleeved on the main shaft through a shaft sleeve.
Further, the seal is a labyrinth seal or a packing seal.
Further, the tubular soft connecting piece is a corrugated pipe.
Furthermore, the fixed plate comprises a first flat plate and a second flat plate which are vertically and fixedly connected, and a through hole for the main shaft to pass through is formed in the first flat plate;
the support plate comprises a third flat plate and reinforcing ribs arranged on the lower surface of the third flat plate;
one end of the third flat plate is connected with the bearing box base, and the upper surface of the other end of the third flat plate is in contact with the lower surface of the second flat plate and is connected with the second flat plate.
Furthermore, one end of the cylindrical soft connecting piece is connected with the fixed plate through a flange, and the other end of the cylindrical soft connecting piece is connected with a shaft end flange of the shell through a flange.
Furthermore, 0-type sealing rings are arranged between the cylindrical soft connecting piece and the fixing plate and between the cylindrical soft connecting piece and the machine shell.
Further, the sealing element is coaxially sleeved on the main shaft.
Compared with the prior art, the invention has the advantages that:
1. according to the centrifugal ventilator, the cylindrical soft connecting piece and the fixing plate are designed between the sealing piece and the shell, the sealing piece is fixed on the fixing plate, the fixing plate is fixed on the base of the bearing box through the supporting plate, and two ends of the cylindrical soft connecting piece are respectively connected with the fixing plate and the shell, so that the heat displacement on the shell can be compensated and absorbed by the cylindrical soft connecting piece in the working process of the ventilator, and cannot be transferred to the sealing piece, and the sealing effect of the sealing piece is ensured;
the centrifugal ventilator only adds the fixed plate and the cylindrical soft connecting piece between the existing shaft end seal and the shell, does not change the structure of the existing sealing piece, adopts the fixation of the shaft end seal, the shaft end seal is connected with the fixed plate in a sealing way, the fixation of the fixed plate does not need to arrange an external seat body, the fixation can be realized only by utilizing the bearing box base on the existing ventilator, and the stability of the fixed plate is good;
in order to improve the sealing effect of two end parts of the main shaft, the structure of the existing sealing element is improved generally, so that the volume of the sealing element is increased, the cost is increased, the maintenance cost is high and the period is long.
2. The sealing element can be sealed by adopting a carbon ring and is arranged on the main shaft through the shaft sleeve, and the sealing effect of the sealing structure is good.
3. The tubular soft connecting piece can be a corrugated pipe, is convenient to install, has low cost and good compensation effect on displacement.
4. According to the invention, the second flat plate is connected with the third flat plate, the first flat plate is sleeved on the spindle, and the third flat plate is fixed with the bearing box base, so that the sealing element is fixed.
5. In order to improve the sealing property, 0-type sealing rings are arranged between the cylindrical soft connecting piece and the fixing plate and between the cylindrical soft connecting piece and the shell.
Drawings
FIG. 1 is a schematic view of a partial structure of a centrifugal fan with a shaft-end sealing device of the present invention adapted to accommodate thermal deformation of a casing;
wherein the reference numbers are as follows:
1-sealing element, 2-fixing plate, 3-cylindrical soft connecting element, 4-machine shell, 41-shaft end flange, 5-bearing box base, 6-supporting plate, 7-shaft sleeve, 8-main shaft, 9-first flat plate, 10-second flat plate, 11-third flat plate and 12-reinforcing rib.
Detailed Description
The invention is described in further detail below with reference to the figures and specific embodiments.
As shown in fig. 1, a centrifugal fan with a shaft end sealing device adaptable to thermal deformation of a casing comprises a casing 4, a bearing box base 5, a main shaft 8 and shaft end sealing devices respectively sleeved at two end parts of the main shaft 8 and connected with two sides of the casing; the shaft end sealing device comprises a sealing element 1, a supporting plate 6, a fixing plate 2 and a cylindrical soft connecting piece 3, wherein the fixing plate 2 and the cylindrical soft connecting piece are positioned between the sealing element 1 and a machine shell 4; the sealing element 1 is coaxially sleeved on the main shaft 8, and the supporting plate 6 is fixed on the bearing box base 5 in a welding mode and extends to the direction of the machine shell 4; the fixing plate 2 is sleeved on the main shaft 8 in a clearance fit mode, and an inner hole of the fixing plate and the main shaft need to ensure a certain clearance and are fixed above the supporting plate 6; the fixing plate 2 is in bolt sealing connection with the sealing element 1; the cylindrical soft connecting piece 3 is sleeved on the main shaft 8, the cylindrical soft connecting piece 3 can be a corrugated pipe, one end of the cylindrical soft connecting piece is connected with the fixed plate 2 in a sealing mode, and the other end of the cylindrical soft connecting piece is connected with the machine shell 4 in a sealing mode; a cavity structure is arranged between the cylindrical soft connecting piece 3 and the main shaft 8, and the cylindrical soft connecting piece 3 can bear heat displacement in three directions (horizontal, vertical and axial).
In the centrifugal ventilator of the embodiment, the sealing element 1 can be a carbon ring seal which is coaxially sleeved on the main shaft 8 through a shaft sleeve 7; at the same time, the seal 1 is also a labyrinth seal or a packing seal.
The fixed plate 2 comprises a first flat plate 9 and a second flat plate 10 which are vertically and fixedly connected, and a through hole for the main shaft 8 to pass through is formed in the first flat plate 9; the connection design of the first flat plate 9 and the second flat plate 10 requires that reasonable perpendicularity is guaranteed, reinforcing ribs are connected between the first flat plate 9 and the second flat plate 10, and the support plate 6 comprises a third flat plate 11 and reinforcing ribs 12 arranged on the lower surface of the third flat plate 11; one end of the third flat plate 11 is connected with the bearing box base 5, the upper surface of the other end is in contact with the lower surface of the second flat plate 10 and is connected with the lower surface of the second flat plate, the second flat plate 10 is connected with the third flat plate 11, the first flat plate 9 is sleeved on the main shaft, the third flat plate 11 is fixed with the bearing box base, the sealing element is fixed, the fixing mode is simple, the stability is good, and meanwhile, the reinforcing ribs 12 are arranged on the third flat plate 11, so that the firmness of the supporting plate can be enhanced.
One end of the cylindrical soft connecting piece 3 is connected with the fixed plate 2 through a flange, and the other end of the cylindrical soft connecting piece is connected with the shaft end flange 41 of the machine shell 4 through a flange. In order to improve the sealing effect, 0-type sealing rings are arranged between the cylindrical soft connecting piece 3 and the fixed plate 2 and between the cylindrical soft connecting piece 3 and the machine shell 4.
In order to solve the problem that a sealing tooth (or a carbon ring) at the shaft end of a fan stator part rubs with a main shaft 8 due to thermal displacement, and the sealing element 1 and the main shaft 8 are damaged, a cylindrical soft connecting part 3 is designed between the sealing element 1 and a shaft end flange 41 of a shell 4, an extended supporting plate 6 is designed on a bearing box base 5, a fixing plate 2 is connected to the supporting plate 6 through bolts, one end of the cylindrical soft connecting part 3 is connected to the shaft end flange 41 of the shell 4, the other end of the cylindrical soft connecting part is connected to the fixing plate 2, and then the sealing element 1 is connected to one end, close to the bearing box, of the fixing plate 2, so that the thermal displacement of the shell 4 can be compensated by the cylindrical soft connecting part 3 and cannot be transmitted to the. On one hand, the sealing effect is ensured, and on the other hand, the damage caused by the contact of the sealing element 1 and the main shaft 8 is avoided.
The above description is only for the purpose of describing the preferred embodiments of the present invention and does not limit the technical solutions of the present invention, and any known modifications made by those skilled in the art based on the main technical concepts of the present invention fall within the technical scope of the present invention.
Claims (8)
1. A centrifugal fan with a shaft end sealing device capable of adapting to the thermal deformation of a shell comprises the shell (4), a bearing box base (5), a main shaft (8) and the shaft end sealing devices which are respectively arranged at two ends of the main shaft (8) and connected with the shell (4);
the shaft end sealing device comprises a sealing element (1);
the method is characterized in that:
the shaft end sealing device also comprises a supporting plate (6), a fixing plate (2) and a cylindrical soft connecting piece (3) which are positioned between the sealing element (1) and the shell (4);
the supporting plate (6) is fixed on the bearing box base (5) and extends to the direction of the shell (4);
the fixing plate (2) is sleeved on the main shaft (8) in a clearance fit manner and is fixed above the supporting plate (6);
the fixing plate (2) is in sealing connection with the sealing element (1);
the cylindrical soft connecting piece (3) is sleeved on the main shaft (8), one end of the cylindrical soft connecting piece is hermetically connected with the fixed plate (2), and the other end of the cylindrical soft connecting piece is hermetically connected with the shell (4); a cavity structure is arranged between the cylindrical soft connecting piece (3) and the main shaft (8).
2. A centrifugal fan having an axial end sealing device capable of adapting to the thermal deformation of a casing according to claim 1, wherein: the sealing element (1) is a carbon ring seal and is coaxially sleeved on the main shaft (8) through a shaft sleeve (7).
3. A centrifugal fan having an axial end sealing device capable of adapting to the thermal deformation of a casing according to claim 1, wherein: the sealing element (1) is a labyrinth seal or a packing seal.
4. A centrifugal fan having a shaft end sealing device capable of adapting to the thermal deformation of a casing according to claim 1, 2 or 3, wherein: the cylindrical soft connecting piece (3) is a corrugated pipe.
5. A centrifugal fan with an axial end sealing device capable of adapting to the thermal deformation of a shell according to claim 4, wherein: the fixed plate (2) comprises a first flat plate (9) and a second flat plate (10) which are vertically and fixedly connected, and a through hole for the main shaft (8) to pass through is formed in the first flat plate (9);
the supporting plate (6) comprises a third flat plate (13) and reinforcing ribs (12) arranged on the lower surface of the third flat plate (13);
one end of the third flat plate (13) is connected with the bearing box base (5), and the upper surface of the other end of the third flat plate is in contact with the lower surface of the second flat plate (10) and is connected with the second flat plate.
6. A centrifugal fan with an axial end sealing device capable of adapting to the thermal deformation of a shell according to claim 5, wherein: one end of the cylindrical soft connecting piece (3) is connected with the fixed plate (2) through a flange, and the other end of the cylindrical soft connecting piece is connected with a shaft end flange (41) of the shell (4) through a flange.
7. A centrifugal fan having an axial end sealing device capable of adapting to the thermal deformation of a casing according to claim 6, wherein: and 0-type sealing rings are arranged between the cylindrical soft connecting piece (3) and the fixing plate (2) and between the cylindrical soft connecting piece (3) and the casing (4).
8. A centrifugal fan having an axial end sealing device capable of adapting to the thermal deformation of a casing according to claim 7, wherein: the sealing element (1) is coaxially sleeved on the main shaft (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010074012.4A CN111188789A (en) | 2020-01-22 | 2020-01-22 | Centrifugal fan with shaft end sealing device capable of adapting to thermal deformation of casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010074012.4A CN111188789A (en) | 2020-01-22 | 2020-01-22 | Centrifugal fan with shaft end sealing device capable of adapting to thermal deformation of casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111188789A true CN111188789A (en) | 2020-05-22 |
Family
ID=70706524
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010074012.4A Withdrawn CN111188789A (en) | 2020-01-22 | 2020-01-22 | Centrifugal fan with shaft end sealing device capable of adapting to thermal deformation of casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111188789A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201425037Y (en) * | 2009-05-26 | 2010-03-17 | 中国石油天然气股份有限公司长庆石化分公司 | Leakage-preventing sealing device for submersible sewage pump |
| CN103089694A (en) * | 2011-10-27 | 2013-05-08 | 南通大通宝富风机有限公司 | Corrugated pipe type shaft end seal device for fans |
| CN208089616U (en) * | 2018-04-15 | 2018-11-13 | 天津长瑞大通流体控制系统有限公司 | Blower Housing is set to keep the sealing structure of stabilized seal in vibration |
| US20180328214A1 (en) * | 2017-05-15 | 2018-11-15 | United Technologies Corporation | Alternative w-seal groove arrangement |
| CN209180106U (en) * | 2018-11-24 | 2019-07-30 | 温州德翔科技有限公司 | A kind of high water pump easy to clean of novel seal |
-
2020
- 2020-01-22 CN CN202010074012.4A patent/CN111188789A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201425037Y (en) * | 2009-05-26 | 2010-03-17 | 中国石油天然气股份有限公司长庆石化分公司 | Leakage-preventing sealing device for submersible sewage pump |
| CN103089694A (en) * | 2011-10-27 | 2013-05-08 | 南通大通宝富风机有限公司 | Corrugated pipe type shaft end seal device for fans |
| US20180328214A1 (en) * | 2017-05-15 | 2018-11-15 | United Technologies Corporation | Alternative w-seal groove arrangement |
| CN208089616U (en) * | 2018-04-15 | 2018-11-13 | 天津长瑞大通流体控制系统有限公司 | Blower Housing is set to keep the sealing structure of stabilized seal in vibration |
| CN209180106U (en) * | 2018-11-24 | 2019-07-30 | 温州德翔科技有限公司 | A kind of high water pump easy to clean of novel seal |
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| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20200522 |
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| WW01 | Invention patent application withdrawn after publication |