CN211314618U - Pneumatic barring system of cantilever type fan of thermal power plant - Google Patents
Pneumatic barring system of cantilever type fan of thermal power plant Download PDFInfo
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- CN211314618U CN211314618U CN201921428257.1U CN201921428257U CN211314618U CN 211314618 U CN211314618 U CN 211314618U CN 201921428257 U CN201921428257 U CN 201921428257U CN 211314618 U CN211314618 U CN 211314618U
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Abstract
The utility model relates to a pneumatic jigger system of a cantilever type fan of a thermal power plant, which comprises a plurality of compressed air main pipes and valve stations communicated with the compressed air main pipes; one end of the valve station is connected with the outlet end of the compressed air main pipe, and the other end of the valve station is connected with the air supply branch pipe through a compressed air outlet pipe; and the outlet end of the air supply branch pipe is provided with a nozzle for supplying compressed air into the fan through the air supply branch pipe and the nozzle so as to drive the fan impeller to rotate. The utility model discloses effectively solved the small-size cantilever type fan of present power plant and stopped for a long time and started the back vibration increase problem.
Description
Technical Field
The utility model belongs to the technical field of power plant equipment, especially, relate to a pneumatic barring system of cantilever type fan of thermal power plant.
Background
The vibration is an important factor influencing the safe operation of the cantilever type fan, and under the condition that other conditions are not changed, the unbalance of the rotating shaft directly determines the vibration of the fan. The static bending deformation of the rotating shaft of the fan generated during hot-state shutdown or long-term shutdown is an important factor influencing the unbalance amount of the cantilever type fan, and the turning is an effective measure for preventing the bending deformation of the cantilever type fan and reducing the vibration of the cantilever type fan.
Traditional fan electric barring device and system need dispose motor and gear, but on the spot because equipment is complicated, occupation space, with high costs and the reason that fan cost itself, maintenance cost are low, and few power plants arrange electric barring to this type of fan, so the bending deformation of this type of fan pivot fails to improve, starts to bring the puzzlement after stopping for a long time for this type of fan.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a pneumatic barring system of cantilever type fan of thermal power plant can prevent the small-size cantilever type fan of present power plant flexural deformation, reduction cantilever type fan vibration problem that produce when hot-state outage or long-term the shutting down effectively.
The utility model provides a pneumatic jigger system of a cantilever type fan of a thermal power plant, which comprises a plurality of compressed air main pipes and valve stations communicated with the compressed air main pipes; one end of the valve station is connected with the outlet end of the compressed air main pipe, and the other end of the valve station is connected with the air supply branch pipe through a compressed air outlet pipe; and the outlet end of the air supply branch pipe is provided with a nozzle for supplying compressed air into the fan through the air supply branch pipe and the nozzle so as to drive the fan impeller to rotate.
Further, the air supply branch pipe penetrates through the fan shell and extends into the fan.
Furthermore, the valve station is provided with a main branch pipe and a bypass branch pipe, the inlet ends of the main branch pipe and the bypass branch pipe are connected with the outlet end of the main compressed air pipe, and the outlet ends of the main branch pipe and the bypass branch pipe are connected with the inlet end of the compressed air outlet pipe.
Further, the main branch pipe is provided with a first manual valve and a pressure control valve; the bypass branch pipe is provided with a second manual valve.
Furthermore, the number of the nozzles is two, and the openings of the nozzles face to the back face of the fan blade and form a spraying angle with the back face of the fan blade.
Borrow by above-mentioned scheme, through the pneumatic barring system of thermal power plant cantilever type fan, solved the complicated, with high costs scheduling problem of structure that traditional fan coiled the vehicle-hour need increase equipment such as motor, gear, this system simple structure, simple operation can effectually avoid the fan to stop for a long time and start the big problem of vibration.
The above description is only an overview of the technical solution of the present invention, and in order to make the technical means of the present invention clearer and can be implemented according to the content of the description, the following detailed description is made with reference to the preferred embodiments of the present invention and accompanying drawings.
Drawings
Fig. 1 is a schematic structural diagram of a pneumatic barring system of a cantilever type fan of a thermal power plant of the present invention;
fig. 2 is the utility model discloses a pneumatic barring system nozzle arrangement mode schematic diagram of cantilever type fan of thermal power plant.
Reference numbers in the figures:
1-main compressed air pipe; 2-a valve station; 3-compressed air outlet pipe; 4-air supply branch pipe; 5-a nozzle; 6-main branch; 7-a bypass branch; 8-a first manual valve; 9-a pressure control valve; 10-a second manual valve; 11-fan blades.
Detailed Description
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings and examples. The following examples are intended to illustrate the invention, but are not intended to limit the scope of the invention.
Referring to fig. 1 and 2, the present embodiment provides a pneumatic barring system for a cantilever type fan of a thermal power plant, including a plurality of main compressed air pipes 1 and a valve station 2 communicated with the main compressed air pipes 1; one end of the valve station 2 is connected with the outlet end of the compressed air main pipe 1, and the other end is connected with two air supply branch pipes 4 through a compressed air outlet pipe 3; the outlet end of the air supply branch pipe 4 is provided with a nozzle 5 for supplying compressed air into the fan through the air supply branch pipe 4 and the nozzle 5 so as to drive the fan impeller to rotate.
In this embodiment, two air supply branch pipes 4 penetrate through the casing of the fan, extend into the fan, are close to the fan blades 11, are adjustable to form a certain angle with the fan blades 11, have a reduced diameter at the outlet end face, and are connected with a nozzle 5.
In this embodiment, the valve station 2 is provided with a main branch pipe 6 and a bypass branch pipe 7, the inlet ends of the main branch pipe 6 and the bypass branch pipe 7 are connected to the outlet end of the main compressed air pipe 1, and the outlet ends of the main branch pipe 6 and the bypass branch pipe 7 are connected to the inlet end of the compressed air outlet pipe 3.
In this embodiment, the main branch pipe 6 is provided with a first manual valve 8 and a pressure control valve 9; the bypass branch 7 is provided with a second manual valve 10.
In the present embodiment, the number of the nozzles 5 is two, and the opening of the nozzle 5 faces the back of the fan blade 11 and forms a jet angle (has a certain angle) with the back of the fan blade 11. The outlet direction of the nozzle 5 is consistent with the rotating direction of the blades.
The operation steps are as follows: before the fan is started or after the fan is stopped in a thermal state, a front first manual valve 8 and a rear first manual valve 8 of a main path pressure control valve 9 are manually opened, compressed air respectively enters the air supply branch pipes 4 through the compressed air outlet pipes 3, and finally is sprayed out from the nozzles 5 positioned on the air supply branch pipes 4 to be sprayed to the fan blades 11. And slowly adjusting the opening degree of the pressure control valve 9, and repeatedly adjusting the opening degree of the pressure control valve 9 according to actual operation requirements until the fan rotates up.
This pneumatic barring system of cantilever type fan of thermal power plant, the complicated, with high costs scheduling problem of structure that need increase equipment such as motor, gear when having solved traditional fan barring, this system simple structure, simple operation can effectually avoid the fan to stop for a long time and start the big problem of vibration.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.
Claims (5)
1. A pneumatic barring system of a cantilever type fan of a thermal power plant is characterized by comprising a plurality of compressed air main pipes (1) and valve stations (2) communicated with the compressed air main pipes (1); one end of the valve station (2) is connected with the outlet end of the compressed air main pipe (1), and the other end of the valve station is connected with the air supply branch pipe (4) through the compressed air outlet pipe (3); and the outlet end of the air supply branch pipe (4) is provided with a nozzle (5) for feeding compressed air into the fan through the air supply branch pipe (4) and the nozzle (5) so as to drive the fan impeller to rotate.
2. The pneumatic barring system of the cantilever thermal power plant fan as claimed in claim 1, wherein the air supply branch pipe (4) penetrates through a fan housing and protrudes into an inside of the fan.
3. The pneumatic jigger system of cantilever fans of a thermal power plant according to claim 2, wherein the valve station (2) is provided with a main branch pipe (6) and a bypass branch pipe (7), the inlet ends of the main branch pipe (6) and the bypass branch pipe (7) are connected with the outlet end of the main compressed air pipe (1), and the outlet ends of the main branch pipe (6) and the bypass branch pipe (7) are connected with the inlet end of the compressed air outlet pipe (3).
4. The pneumatic jigger system of cantilever thermal power plant wind turbine as claimed in claim 3, wherein the main branch pipe (6) is provided with a first manual valve (8) and a pressure control valve (9); the bypass branch pipe (7) is provided with a second manual valve (10).
5. The pneumatic jigger system of cantilever fans of thermal power plants as claimed in claim 1, wherein the number of the nozzles (5) is two, and the nozzles (5) are opened toward the back of the fan blades (11) and form a jet angle with the back of the fan blades (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921428257.1U CN211314618U (en) | 2019-08-30 | 2019-08-30 | Pneumatic barring system of cantilever type fan of thermal power plant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921428257.1U CN211314618U (en) | 2019-08-30 | 2019-08-30 | Pneumatic barring system of cantilever type fan of thermal power plant |
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| CN211314618U true CN211314618U (en) | 2020-08-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921428257.1U Active CN211314618U (en) | 2019-08-30 | 2019-08-30 | Pneumatic barring system of cantilever type fan of thermal power plant |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594188A (en) * | 2019-08-30 | 2019-12-20 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Pneumatic barring system of cantilever type fan of thermal power plant |
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2019
- 2019-08-30 CN CN201921428257.1U patent/CN211314618U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110594188A (en) * | 2019-08-30 | 2019-12-20 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Pneumatic barring system of cantilever type fan of thermal power plant |
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