CN110594188A - 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
- Publication number
- CN110594188A CN110594188A CN201910813058.0A CN201910813058A CN110594188A CN 110594188 A CN110594188 A CN 110594188A CN 201910813058 A CN201910813058 A CN 201910813058A CN 110594188 A CN110594188 A CN 110594188A
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- CN
- China
- Prior art keywords
- branch pipe
- fan
- compressed air
- power plant
- pipe
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- 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
-
- 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
- F04D29/002—Details, component parts, or accessories 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
- F04D29/66—Combating cavitation, whirls, noise, vibration or the like; Balancing
- F04D29/661—Combating cavitation, whirls, noise, vibration or the like; Balancing especially adapted for elastic fluid pumps
- F04D29/662—Balancing of rotors
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Control Of Positive-Displacement Air Blowers (AREA)
Abstract
The invention relates to a pneumatic barring 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 invention effectively solves the problem that the vibration of the small cantilever type fan of the existing power plant is increased after the small cantilever type fan is stopped and started for a long time.
Description
Technical Field
The invention belongs to the technical field of power plant equipment, and particularly relates to a pneumatic barring system of a cantilever type fan of a 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.
Disclosure of Invention
The invention aims to provide a pneumatic barring system of a cantilever type fan of a thermal power plant, which can effectively prevent the small cantilever type fan of the existing power plant from bending deformation when the small cantilever type fan is stopped in a hot state or is stopped for a long time and reduce the vibration problem of the cantilever type fan.
The invention provides a pneumatic barring 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 foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of a pneumatic barring system for a cantilever type fan of a thermal power plant according to the present invention;
fig. 2 is a schematic diagram of a nozzle arrangement of a pneumatic jigger system of a cantilever type fan of a 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 embodiments of the present invention is provided in connection with 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, it should be noted that, for those skilled in the art, many 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 |
|---|---|---|---|
| CN201910813058.0A CN110594188A (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 |
|---|---|---|---|
| CN201910813058.0A CN110594188A (en) | 2019-08-30 | 2019-08-30 | Pneumatic barring system of cantilever type fan of thermal power plant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110594188A true CN110594188A (en) | 2019-12-20 |
Family
ID=68856824
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910813058.0A Pending CN110594188A (en) | 2019-08-30 | 2019-08-30 | Pneumatic barring system of cantilever type fan of thermal power plant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110594188A (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201121197Y (en) * | 2007-11-07 | 2008-09-24 | 首钢总公司 | Stove blower rolling gear |
| JP2009079580A (en) * | 2007-09-27 | 2009-04-16 | Toshiba Corp | Power generation plant and its control method |
| CN201502558U (en) * | 2009-02-11 | 2010-06-09 | 金川集团有限公司 | Draught fan turning clamping tool |
| CN103161526A (en) * | 2011-12-14 | 2013-06-19 | 中工国际工程股份有限公司 | Gas-steam combined cycle power generation system |
| CN104819173A (en) * | 2015-05-11 | 2015-08-05 | 中国海洋石油总公司 | Rotor disc-dynamic cleaning tool and method for centrifugal natural gas compressor |
| WO2017073195A1 (en) * | 2015-10-29 | 2017-05-04 | 三菱日立パワーシステムズ株式会社 | Combined cycle plant and method for controlling operation of combined cycle plant |
| CN106907198A (en) * | 2017-04-28 | 2017-06-30 | 安徽新宁能源科技有限公司 | A kind of pneumatic jiggering method of steam turbine |
| CN208220897U (en) * | 2018-05-24 | 2018-12-11 | 西安海之韵机电科技有限公司 | A kind of PA machine diesel engine motor-driven turning mechanism |
| CN208380985U (en) * | 2018-06-14 | 2019-01-15 | 河南中烟工业有限责任公司 | A kind of anti-cavitation safety guard of novel horizontal water pump |
| CN211314618U (en) * | 2019-08-30 | 2020-08-21 | 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 |
-
2019
- 2019-08-30 CN CN201910813058.0A patent/CN110594188A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009079580A (en) * | 2007-09-27 | 2009-04-16 | Toshiba Corp | Power generation plant and its control method |
| CN201121197Y (en) * | 2007-11-07 | 2008-09-24 | 首钢总公司 | Stove blower rolling gear |
| CN201502558U (en) * | 2009-02-11 | 2010-06-09 | 金川集团有限公司 | Draught fan turning clamping tool |
| CN103161526A (en) * | 2011-12-14 | 2013-06-19 | 中工国际工程股份有限公司 | Gas-steam combined cycle power generation system |
| CN104819173A (en) * | 2015-05-11 | 2015-08-05 | 中国海洋石油总公司 | Rotor disc-dynamic cleaning tool and method for centrifugal natural gas compressor |
| WO2017073195A1 (en) * | 2015-10-29 | 2017-05-04 | 三菱日立パワーシステムズ株式会社 | Combined cycle plant and method for controlling operation of combined cycle plant |
| CN106907198A (en) * | 2017-04-28 | 2017-06-30 | 安徽新宁能源科技有限公司 | A kind of pneumatic jiggering method of steam turbine |
| CN208220897U (en) * | 2018-05-24 | 2018-12-11 | 西安海之韵机电科技有限公司 | A kind of PA machine diesel engine motor-driven turning mechanism |
| CN208380985U (en) * | 2018-06-14 | 2019-01-15 | 河南中烟工业有限责任公司 | A kind of anti-cavitation safety guard of novel horizontal water pump |
| CN211314618U (en) * | 2019-08-30 | 2020-08-21 | 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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Application publication date: 20191220 |