CN105545770A - Shafting capable of achieving steam-electric alternate drive and combined drive of large-scale static-blade adjustable axial flow fan - Google Patents
Shafting capable of achieving steam-electric alternate drive and combined drive of large-scale static-blade adjustable axial flow fan Download PDFInfo
- Publication number
- CN105545770A CN105545770A CN201610057908.5A CN201610057908A CN105545770A CN 105545770 A CN105545770 A CN 105545770A CN 201610057908 A CN201610057908 A CN 201610057908A CN 105545770 A CN105545770 A CN 105545770A
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- shaft
- drive
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- fan
- axial flow
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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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/06—Units comprising pumps and their driving means the pump being electrically driven
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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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/022—Units comprising pumps and their driving means comprising a yielding coupling, e.g. hydraulic
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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
- F04D25/00—Pumping installations or systems
- F04D25/02—Units comprising pumps and their driving means
- F04D25/04—Units comprising pumps and their driving means the pump being fluid-driven
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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
- F04D29/05—Shafts or bearings, or assemblies thereof, specially adapted for elastic fluid pumps
- F04D29/053—Shafts
- F04D29/054—Arrangements for joining or assembling shafts
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention relates to the field of drive of fans of thermal power plants, in particular to a shafting structure capable of achieving steam-electric alternate drive and combined drive of a large-scale static-blade adjustable axial flow fan of a power station boiler. The shafting comprises a motor, a speed variable clutch, a small dual-shaft-extension steam turbine, a reduction box, a torque-transmission intermediate shaft and an axial flow fan rotor assembly, and the devices (parts) are sequentially connected through flexible couplings. According to the shafting structure capable of achieving steam-electric alternate drive and combined drive of the large-scale static-blade adjustable axial flow fan of the power station boiler provided by the invention, the operation flexibility of a steam-driven air inducing unit can be improved, the cost of the capacity expansion reformation of a steam-driven induced draft fan is reduced and fan energy saving is facilitated.
Description
technical field:
The present invention relates to the driving field of thermal power plant blower fan, be specifically related to a kind of large-scale Silence Process axial fan vapour electrical alternations and drive and combine the axle system of driving.
background technique:
What boiler induced-draft fan was carried because of it is dust-laden and the higher flue gas of temperature, and air quantity is large, and blast is high, and its reliability of operation, wear resistance, Economy and price will directly affect initial cost and the economical operation benefit from now on of power plant.In the induced draught fan that current domestic Large-scale machine set boiler is equipped with, be mainly Silence Process axial fan or variable moning blade axial flow fan two profiles formula; The features such as Silence Process axial fan has: wear resistance is better, and initial outlay is lower, and the higher and interruption of service rate of safety reliability is lower; Variable moning blade axial flow fan has: initial outlay is high, complex structure, reliability are lower slightly, efficiency high, also has a small amount of centrifugal blower.According to the part throttle characteristics of domestic 1000MW unit, generally all require that unit possesses peak modulation capacity and variable load operation mode.Centrifugal fan peak regulation is less economical, runs power consumption large, frequency conversion speed-adjusting system must be adopted to regulate air quantity and the blast of blower fan, to adapt to the change of operating conditions.In addition, centrifugal fan equipment volume is large, and weight is large, thus brings very large difficulty to inspection and maintenance.When Large Size Induced Draft Fans type selecting, general employing Silence Process axial fan or employing variable moning blade axial flow fan.On the whole, Silence Process axial fan is in the majority.Axial fan needs the torsion pass jack shaft by length is larger to be connected with driving arrangement through cigarette (wind) road, and driving arrangement is generally motor, and high-power blower also usually adopts small turbine driving.
In large-scale in-service unit, to adopt prior art to drive boiler induced-draft fan by small turbine, induced draught fan is mostly Silence Process axial flow, because environmental protection standard improves, during units minimum discharge transformation, need corresponding enforcement induced draught fan capacity-increasing transformation, small turbine, reduction gear box all need accessories rebuilding, due to Parameters variation such as power, rotating speed, speed ratios, Plant reconstruction plant modernization cost is very large, and steam line capacity also becomes restriction small turbine power increase factor.New-built unit, the startup vapour source of induced draught fan small turbine is from starting trouble, and starting trouble also forms impact to the convenient, flexible property of unit starting.For this reason, some engineering installation startup blower fan, add engineering cost and (adopt the blower fan group that small turbine drives, generally be provided with and start blower fan group, starting blower fan group adopts motor to drive, during unit operation, first put into operation and start blower fan group, treat that boiler vapour amount is stablized, can normally to small turbine steam supply time, then small turbine to be dropped into, now starts wind unit outage, the frequency that puts into operation that general thermal power plant starts blower fan group is very low, to wait indefinitely problem when often occurring again putting into operation owing to not running blower fan rust for a long time).In order to solve the problems of the technologies described above, a kind of new technological scheme of special proposition.
summary of the invention:
The present invention drives for realizing large-scale Silence Process axial fan vapour electrical alternations and combines driving, provides a kind of large-scale Silence Process axial fan vapour electrical alternations and drives and combine the axle system of driving.This programme both can be used for improvement project, also can adopt in new construction.
The technical solution used in the present invention is: a kind of large-scale Silence Process axial fan vapour electrical alternations drives and combines the axle system of driving, comprise motor, speed change clutch, Double shaft-extension small turbine, speed reducer, torsion pass jack shaft and axial fan rotor assembly, the output shaft of motor is connected by flexible coupling A with the input shaft of speed change clutch, the output shaft of speed change clutch is connected by flexible coupling B with the input shaft of Double shaft-extension small turbine, the output shaft of Double shaft-extension small turbine is connected by flexible coupling C with the input shaft of speed reducer, the output shaft of speed reducer is connected by flexible coupling D with torsion pass jack shaft, torsion pass jack shaft is connected by flexible coupling E with the drive end of axial fan rotating shaft assembly.
What described speed change clutch was gear-box with synchronous automatic clutch is integrated, has both possessed speedup or the deceleration of gear-box, and has possessed again the clutch function of synchronous automatic clutch.
The unit starting stage: motor by speed change clutch by rotating speed speedup to a certain rotating speed, then after speed reducer slows down, reach the demand rotating speed of blower fan.Until unit reach certain load main steam turbine draw gas can normally to small turbine steam supply time, unit enters the normal operation stage: Double shaft-extension small turbine reaches the demand rotating speed live axle flow type fan rotor assembly of blower fan after speed reducer slows down.
In axle system, the hot swell increment of each equipment is absorbed by each flexible coupling, when whole axle ties up to cold conditions, each flexible coupling keeps certain prestretching/pressure stretch amount, after treating that the hot swell increment of axle system each several part is stable, in axle system, each flexible coupling axial force disappears substantially, makes axle tie up to hot operation and ensures optimum Working.
The invention has the beneficial effects as follows: cost when it can reduce in-service unit induced draught fan capacity-increasing transformation, and when unit starting, the electronic mode of induced draught fan can be realized and start, add the flexibility of unit starting and operation.
accompanying drawing illustrates:
Fig. 1 is structural representation of the present invention.
1-motor, 2-speed change clutch, 3-Double shaft-extension small turbine, 4-speed reducer, 5-torsion pass jack shaft, 6-axial fan rotor assembly, 7-flexible coupling A, 8-flexible coupling B, 9-flexible coupling C, 10-flexible coupling D, 11-flexible coupling E
embodiment:
With reference to accompanying drawing, a kind of large-scale Silence Process axial fan vapour electrical alternations drives and combines the axle system of driving, comprise motor 1, speed change clutch 2, Double shaft-extension small turbine 3, speed reducer 4, torsion pass jack shaft 5 and axial fan rotor assembly 6, the output shaft of motor 1 is connected by flexible coupling A7 with the input shaft of speed change clutch 2, the output shaft of speed change clutch 2 is connected by flexible coupling B8 with the input shaft of Double shaft-extension small turbine 3, the output shaft of Double shaft-extension small turbine 3 is connected by flexible coupling C9 with the input shaft of speed reducer 4, the output shaft of speed reducer 4 is connected by flexible coupling D10 with torsion pass jack shaft 5, torsion pass jack shaft 5 is connected by flexible coupling E11 with the drive end of axial fan rotating shaft assembly 6.、
When vapour electrical alternations drives air inducing unit to be in cold conditions stoppage in transit, in the axle system that large-scale axial flow type blower fan vapour electrical alternations drives, each flexible coupling is in stretching/compressing state, in axle system there is certain axially loaded in each equipment (parts), and axial force is born by each equipment thrust-bearing.Difference from prior art is, blower fan can realize electronic startup, during blower fan group cold conditions, small turbine send shaft seal, vacuumize, starting electrical machinery, need to arrange soft starting device, because small turbine remains static, according to speed change clutch characteristic, engage at startup moment speed change clutch, whole blower fan group is driven by motor, with a certain rotating speed lower than blower fan rated speed, rotational speed optimization can be carried out by actual conditions, according to small turbine air blast situation, also rated speed can be selected to operate, blower fan is in determines the operation of rotating speed stator blade regulative mode, treat that unit reaches certain load, main steam turbine draw gas can normally to small turbine steam supply time, small turbine carries out red switch, when small turbine rotating speed rise to surmount motor speed time, according to speed change clutch characteristic, motor is thrown away, then motor switch is disconnected, complete motor off-the-line, blower fan enters rotating speed control mode, along with unit output increases, gradually by blower fan stator blade standard-sized sheet, air quantity passes through rotational speed regulation completely, so far the start up period that blower fan group completing, enter the normal operation stage, enter the method for operation after the normal operation stage and routine intravenous adjusts blower fan group the same.In this technological scheme, small turbine power will can meet the needs of blower fan completely, the vapour electrical alternations that can realize blower fan drives, during unit starting, blower fan starts in electronic mode, does not need the steam supply relying on starting trouble, thus, do not need the consumption of steam considering small turbine in starting trouble design, contribute to the reduction of engineering cost.
When this programme is used for improvement project, transformation rear fan air horsepower increases, limit by steam line capacity, also former power can be maintained constant when small turbine is transformed, also contribute to controlling improvement expenses, also contribute to improving small turbine operational efficiency, not enough part motor speed can be born by motor when small turbine underpower is to meet blower fan needs will match with blower fan rated speed, during concrete enforcement, blower fan is under rotating speed control mode, when blower fan is exerted oneself increase, when small turbine admission control valve opening is close to standard-sized sheet, blower fan stator blade turns down gradually, exert oneself constant for maintaining blower fan, thus, wind generating unit speed raises gradually, when rising to rated speed, starting electrical machinery, blower fan enters determines the operation of rotating speed stator blade regulative mode, when blower fan stator blade aperture increases, when blower fan is exerted oneself and is increased further, small turbine admission modulating valve standard-sized sheet, when rotating speed has reduction trend, speed change clutch engages, motor starts to bear exerts oneself, by the air horsepower of small turbine and motor shared blower fan, the vapour electrical alternations that this technological scheme can realize blower fan drives and combines driving.
Claims (2)
1. one kind large-scale Silence Process axial fan vapour electrical alternations drives and combines the axle system of driving, it is characterized in that: comprise motor (1), speed change clutch (2), Double shaft-extension small turbine (3), speed reducer (4), torsion pass jack shaft (5) and axial fan rotor assembly (6), the output shaft of motor (1) and the input shaft of speed change clutch (2) are by flexible coupling A(7) be connected, the output shaft of speed change clutch (2) and the input shaft of Double shaft-extension small turbine (3) are by flexible coupling B(8) be connected, the output shaft of Double shaft-extension small turbine (3) and the input shaft of speed reducer (4) are by flexible coupling C(9) be connected, the output shaft of speed reducer (4) with torsion pass jack shaft (5) by flexible coupling D(10) be connected, torsion pass jack shaft (5) passes through flexible coupling E(11 with the drive end of axial fan rotating shaft assembly (6)) be connected.
2. large-scale Silence Process axial fan vapour electrical alternations according to claim 1 drives and combines the axle system of driving, it is characterized in that: what described speed change clutch (2) was gear-box with synchronous automatic clutch is integrated, both possessed speedup or the deceleration of gear-box, possessed again the clutch function of synchronous automatic clutch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610057908.5A CN105545770A (en) | 2016-01-28 | 2016-01-28 | Shafting capable of achieving steam-electric alternate drive and combined drive of large-scale static-blade adjustable axial flow fan |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610057908.5A CN105545770A (en) | 2016-01-28 | 2016-01-28 | Shafting capable of achieving steam-electric alternate drive and combined drive of large-scale static-blade adjustable axial flow fan |
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| Publication Number | Publication Date |
|---|---|
| CN105545770A true CN105545770A (en) | 2016-05-04 |
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| CN201610057908.5A Pending CN105545770A (en) | 2016-01-28 | 2016-01-28 | Shafting capable of achieving steam-electric alternate drive and combined drive of large-scale static-blade adjustable axial flow fan |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107131010A (en) * | 2017-04-10 | 2017-09-05 | 西安西热节能技术有限公司 | A kind of power station auxiliary vapour electric hybrid driving, electricity generation system and method |
| CN107345489A (en) * | 2016-05-05 | 2017-11-14 | 沈阳铝镁设计研究院有限公司 | A kind of method and special purpose device for power plant steam turbine exhaust steam condenser system |
| CN110145475A (en) * | 2019-06-21 | 2019-08-20 | 哈尔滨广瀚动力传动有限公司 | More driving structures of Thermal Power Station's primary air fan |
| CN112398275A (en) * | 2020-11-12 | 2021-02-23 | 中国长江动力集团有限公司 | Novel double-end driving generator |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1614034A (en) * | 2004-08-12 | 2005-05-11 | 陕西鼓风机（集团）有限公司 | Blowing energy recovering method for blast furnace |
| CN201486598U (en) * | 2009-06-01 | 2010-05-26 | 张光宇 | Gas making blower work cogeneration energy saver |
| CN201696527U (en) * | 2010-06-30 | 2011-01-05 | 中国船舶重工集团公司第七○三研究所 | Variable speed clutch |
| CN101963074A (en) * | 2010-08-27 | 2011-02-02 | 浙江晋巨化工有限公司 | Method for automatically adjusting transient wide range of steam turbine driven load and cogenerating power and heat |
| CN103244439A (en) * | 2013-04-23 | 2013-08-14 | 中冶南方工程技术有限公司 | Utilization system and method of blast furnace hot blast stove combustion emission for blast furnace electric blower |
| CN205331014U (en) * | 2016-01-28 | 2016-06-22 | 中国船舶重工集团公司第七�三研究所 | Shafting of alternative drive of adjustable axial -flow fan vapour of large -scale quiet leaf electricity and combined drive |
-
2016
- 2016-01-28 CN CN201610057908.5A patent/CN105545770A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1614034A (en) * | 2004-08-12 | 2005-05-11 | 陕西鼓风机（集团）有限公司 | Blowing energy recovering method for blast furnace |
| CN201486598U (en) * | 2009-06-01 | 2010-05-26 | 张光宇 | Gas making blower work cogeneration energy saver |
| CN201696527U (en) * | 2010-06-30 | 2011-01-05 | 中国船舶重工集团公司第七○三研究所 | Variable speed clutch |
| CN101963074A (en) * | 2010-08-27 | 2011-02-02 | 浙江晋巨化工有限公司 | Method for automatically adjusting transient wide range of steam turbine driven load and cogenerating power and heat |
| CN103244439A (en) * | 2013-04-23 | 2013-08-14 | 中冶南方工程技术有限公司 | Utilization system and method of blast furnace hot blast stove combustion emission for blast furnace electric blower |
| CN205331014U (en) * | 2016-01-28 | 2016-06-22 | 中国船舶重工集团公司第七�三研究所 | Shafting of alternative drive of adjustable axial -flow fan vapour of large -scale quiet leaf electricity and combined drive |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107345489A (en) * | 2016-05-05 | 2017-11-14 | 沈阳铝镁设计研究院有限公司 | A kind of method and special purpose device for power plant steam turbine exhaust steam condenser system |
| CN107131010A (en) * | 2017-04-10 | 2017-09-05 | 西安西热节能技术有限公司 | A kind of power station auxiliary vapour electric hybrid driving, electricity generation system and method |
| CN110145475A (en) * | 2019-06-21 | 2019-08-20 | 哈尔滨广瀚动力传动有限公司 | More driving structures of Thermal Power Station's primary air fan |
| CN112398275A (en) * | 2020-11-12 | 2021-02-23 | 中国长江动力集团有限公司 | Novel double-end driving generator |
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Application publication date: 20160504 |
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