CN205260375U - Two shafting structures of driving of large -scale axial -flow fan vapour of power plant boiler electricity - Google Patents
Two shafting structures of driving of large -scale axial -flow fan vapour of power plant boiler electricity Download PDFInfo
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- CN205260375U CN205260375U CN201521039425.XU CN201521039425U CN205260375U CN 205260375 U CN205260375 U CN 205260375U CN 201521039425 U CN201521039425 U CN 201521039425U CN 205260375 U CN205260375 U CN 205260375U
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Abstract
The utility model relates to a drive field of thermal power factory atmosphere machine specifically is a two shafting structures of driving of large -scale axial -flow fan vapour of power plant boiler electricity, and it includes that the motor is stretched to little steam turbine, variable speed clutch, biax, jackshaft and axial -flow fan rotor assembly are turned round to the biography, and above -mentioned each equipment loops through the membranous disc shaft coupling and is connected. The utility model provides a two shafting structures of driving of large -scale axial -flow fan vapour of power plant boiler electricity is realized, jackshaft and the hot inflation problem of electric motor rotor turned round that pass can be solved to the shafting of avoiding from this arousing vibrates, realizes the large -scale axial -flow fan vapour of power plant boiler electricity dual drive, helps the large fan of thermal power plant lectotype and energy -conservation.
Description
Technical field:
The utility model relates to the driving field of thermal power plant blower fan, is specifically related to a kind of shafting structure of station boiler large-scale axial flow type blower fan vapour electricity Dual Drive.
Background technology:
The large blower fan of station boiler one general configuration three, comprise pressure fan, air-introduced machine, primary air fan etc., pattern has centrifugal or axial-flow type, general large-sized station boiler adapted axial fan, axial fan need to be connected with driving arrangement through cigarette (wind) road by a larger torsion pass jackshaft of length, driving arrangement is generally motor, and high-power blower also usually adopts small turbine to drive.
For simplification system and the consideration of raising the efficiency, station boiler air-introduced machine trend adopts the mode that increases unification of drawing, cancel booster fan, born separately by air-introduced machine, since thermal power plant implements environmental protection minimum discharge standard especially recently, due to air and gas system resistance increment, the air-introduced machine increased power of 600MW and above capacity unit is more, if adopt motor to drive, station-service electric pressure need to be brought up to 10kV by 6kV, and the mode that adopts small turbine to drive exists efficiency problem on the low side. Adopt vapour electricity Dual Drive can well dissolve this contradiction, but owing to being subject to the puzzlement of the hot expansion issues of axle induced-draft fan torsion pass jackshaft, the mode of axle induced-draft fan vapour electricity Dual Drive is not yet applied.
Summary of the invention:
The utility model, for realizing large axial flow fan vapour electricity Dual Drive, provides a kind of shafting structure of station boiler large-scale axial flow type blower fan vapour electricity Dual Drive.
The utility model is to adopt following technical scheme to realize: the two shafting structures that drive of a kind of station boiler large-scale axial flow type blower fan vapour electricity, comprise small turbine, speed change clutch, motor for double-ended drive, torsion pass jackshaft and axial fan rotor assembly, the output shaft of small turbine is connected by diaphragm coupling A with the power shaft of speed change clutch, the output shaft of speed change clutch is connected by diaphragm coupling B with the power shaft of motor for double-ended drive, the output shaft of motor for double-ended drive is connected by diaphragm coupling C with torsion pass jackshaft, torsion pass jackshaft is connected by diaphragm coupling D with the drive end of axial fan rotating shaft assembly, small turbine is provided with small turbine thrust bearing, axial fan rotating shaft assembly is provided with blower fan thrust bearing, speed change clutch input side is provided with speed change clutch thrust bearing A, speed change clutch outlet side is provided with speed change clutch thrust bearing B.
The output of motor for double-ended drive is provided with motor for double-ended drive thrust bearing.
Described speed change clutch be by gear-box with synchronize the integrated of automatic clutch, both possessed speedup or the deceleration of gear-box, possess again the automatic clutch function of synchronous automatic clutch.
The beneficial effects of the utility model are: input and output at speed change clutch arrange respectively thrust bearing, add the thrust bearing of small turbine and axial fan, whole axle co-exists in 4 dead points in being, in axle system, the hot swell increment of each equipment (parts) is absorbed by each diaphragm coupling.
When whole axle ties up to cold conditions, each diaphragm coupling keeps certain prestretched amount, treats that axle is, after the hot swell increment of each several part is stablized, now to ensure rotor magnetic force center axial alignment, in axle system, each diaphragm coupling axial force disappears substantially, makes axle tie up to hot operation and ensures optimum Working.
Also can increase a thrust bearing at the output bearing of motor for double-ended drive, in whole like this axle system, dead point quantity is increased to 5 again, and in axle system, the hot swell increment of each equipment or parts is still absorbed by each diaphragm coupling.
Brief description of the drawings:
Fig. 1 is the structural representation of embodiment mono-.
1-small turbine, 2-speed change clutch, 3-motor for double-ended drive, 4-torsion pass jackshaft, 5-axial fan rotor assembly, 6-diaphragm coupling A, 7-diaphragm coupling B, 8-diaphragm coupling C, 9-diaphragm coupling D, 10-small turbine thrust bearing, 11-blower fan thrust bearing, 12-speed change clutch thrust bearing A, 13-speed change clutch thrust bearing B.
Fig. 2 is the structural representation of embodiment bis-.
1-small turbine, 2-speed change clutch, 3-motor for double-ended drive, 4-torsion pass jackshaft, 5-axial fan rotor assembly, 6-diaphragm coupling A, 7-diaphragm coupling B, 8-diaphragm coupling C, 9-diaphragm coupling D, 10-small turbine thrust bearing, 11-blower fan thrust bearing, 12-speed change clutch thrust bearing A, 13-speed change clutch thrust bearing B, 14-motor for double-ended drive thrust bearing.
Detailed description of the invention:
Embodiment mono-:
As shown in Figure 1, the two shafting structures that drive of a kind of station boiler large-scale axial flow type blower fan vapour electricity, comprise small turbine 1, speed change clutch 2, motor for double-ended drive 3, torsion pass jackshaft 4 and axial fan rotor assembly 5, diaphragm coupling A6, diaphragm coupling B7, diaphragm coupling C8, diaphragm coupling D9, the thrust bearing 10 of small turbine, the thrust bearing 11 of blower fan, speed change clutch thrust bearing A12, speed change clutch thrust bearing B13. The power shaft of the output shaft of small turbine 1 and speed change clutch 2 is connected by diaphragm coupling A6, the power shaft of the output shaft of speed change clutch 2 and motor for double-ended drive 3 is connected by diaphragm coupling B7, the output shaft of motor for double-ended drive 3 is connected by diaphragm coupling C8 with torsion pass jackshaft 4, and torsion pass jackshaft 4 is connected by diaphragm coupling D9 with the drive end of axial fan rotating shaft assembly 5.
When embodiment mono-concrete enforcement, drive air inducing unit in the time that cold conditions is stopped transport when vapour electricity is two, in the two axle systems of driving of large-scale axial flow type blower fan vapour electricity, each diaphragm coupling is in extended state, in axle system there is certain axially loaded in each equipment or parts, but because diaphragm coupling axial rigidity is less, thereby axial force is little, when startup, can not cause the problems such as shafting vibration. Difference from prior art is, driven separately the mode of blower fan by motor, rotor can move freely vertically, the expansion of torsion pass jackshaft 4 and rotor can not be restricted, rotor can not produce axially loaded, the axial thrust when thrust bearing of blower fan only need to be born blower fan work; Driven separately the mode of blower fan by small turbine, torsion pass jackshaft 4 two ends adopt diaphragm coupling, and same fan rotor, reduction gear box connect respectively; Reductor is provided with thrust bearing, is used for the axial force of the hot generation of balance torsion pass jackshaft, because diaphragm coupling axial rigidity is larger, and weight is heavier, thereby axial force and radial load all larger, blower fan is the startup stage of raising speed, reductor duty is comparatively severe. When vapour electricity pair drives air-introduced machine startup, can select electronic mode, also can select steam-operating mode, when blower fan starts under electronic mode, started by motor for double-ended drive, the operation of drive air-introduced machine, speed change clutch is in off-state, and small turbine keeps inactive state, small turbine 1 red switch at any time, in the time that clutch input speed has the output speed of surmounting trend, clutch engages, and blower fan enters the two states that drive of vapour electricity; When blower fan starts under steam-operating mode, small turbine 1 red switch, speed change clutch 2, in engagement state, drives motor for double-ended drive 3 to rotate together with blower fan, and when rotating speed approaches or reaches nominal operation rotating speed, motor switch closes a floodgate, and enters the two duties of driving of vapour electricity. When unit enters steady operational status, torsion pass jackshaft 4 and rotor expand when tending towards stability, and the amount of tension of each diaphragm coupling is zero substantially, and axial force also disappears substantially, and blower fan group enters steady operational status. Because the hot swell increment of small turbine rotor is little, thereby in the time that small turbine adopts middle and slow speed of revolution scheme, the shaft coupling between small turbine and speed change clutch also can adopt the diaphragm coupling of prior art.
Embodiment bis-:
As shown in Figure 2, the two shafting structures that drive of station boiler large-scale axial flow type blower fan vapour electricity, comprise small turbine 1, speed change clutch 2, motor for double-ended drive 3, torsion pass jackshaft 4 and axial fan rotor assembly 5, diaphragm coupling A6, diaphragm coupling B7, diaphragm coupling C8, diaphragm coupling D9, the thrust bearing 10 of small turbine, the thrust bearing 11 of blower fan, speed change clutch thrust bearing A12, speed change clutch thrust bearing B13, motor for double-ended drive thrust bearing 14. The power shaft of the output shaft of small turbine 1 and speed change clutch 2 is connected by diaphragm coupling A6, the power shaft of the output shaft of speed change clutch 2 and motor for double-ended drive 3 is connected by diaphragm coupling B7, the output shaft of motor for double-ended drive 3 is connected by diaphragm coupling C8 with torsion pass jackshaft 4, and torsion pass jackshaft 4 is connected by diaphragm coupling D9 with the drive end of axial fan rotating shaft assembly 5.
Embodiment bis-is concrete while implementing and embodiment mono-is basic identical, difference is: due to the position-limiting action of motor for double-ended drive thrust bearing 14, this place is also as a dead point in axle system, for ensureing the hot centering of rotor of motor for double-ended drive 3, the hot swell increment that only need consider motor for double-ended drive rotor self when cold conditions, the displacement between its cold and hot is less.
Claims (3)
1. the two shafting structures that drive of station boiler large-scale axial flow type blower fan vapour electricity, it is characterized in that: comprise small turbine (1), speed change clutch (2), motor for double-ended drive (3), torsion pass jackshaft (4) and axial fan rotor assembly (5), the output shaft of small turbine (1) with the power shaft of speed change clutch (2) by diaphragm coupling A(6) be connected, the output shaft of speed change clutch (2) with the power shaft of motor for double-ended drive (3) by diaphragm coupling B(7) be connected, the output shaft of motor for double-ended drive (3) with torsion pass jackshaft (4) by diaphragm coupling C(8) be connected, torsion pass jackshaft (4) with the drive end of axial fan rotating shaft assembly (5) by diaphragm coupling D(9) be connected, small turbine (1) left side is provided with small turbine thrust bearing (10), axial fan rotating shaft assembly (5) inside is provided with blower fan thrust bearing (11), speed change clutch (2) input side is provided with speed change clutch thrust bearing A(12), speed change clutch (2) outlet side is provided with speed change clutch thrust bearing B(13).
2. the two shafting structures that drive of station boiler large-scale axial flow type blower fan vapour electricity according to claim 1, is characterized in that: the output of motor for double-ended drive (3) is provided with motor for double-ended drive thrust bearing (14).
3. the two shafting structures that drive of a kind of station boiler large-scale axial flow type blower fan vapour electricity according to claim 1, it is characterized in that: described speed change clutch (2) be by gear-box with synchronize the integrated of automatic clutch, both possessed speedup or the deceleration of gear-box, possessed again the automatic clutch function of synchronous automatic clutch.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521039425.XU CN205260375U (en) | 2015-12-15 | 2015-12-15 | Two shafting structures of driving of large -scale axial -flow fan vapour of power plant boiler electricity |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201521039425.XU CN205260375U (en) | 2015-12-15 | 2015-12-15 | Two shafting structures of driving of large -scale axial -flow fan vapour of power plant boiler electricity |
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| CN205260375U true CN205260375U (en) | 2016-05-25 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370598A (en) * | 2015-12-15 | 2016-03-02 | 中国船舶重工集团公司第七�三研究所 | Steam-electric double-drive shaft system structure of large axial flow fan of power station boiler |
| EP3848557A1 (en) * | 2020-01-10 | 2021-07-14 | Toshiba Energy Systems & Solutions Corporation | Gas turbine power generation system |
-
2015
- 2015-12-15 CN CN201521039425.XU patent/CN205260375U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105370598A (en) * | 2015-12-15 | 2016-03-02 | 中国船舶重工集团公司第七�三研究所 | Steam-electric double-drive shaft system structure of large axial flow fan of power station boiler |
| EP3848557A1 (en) * | 2020-01-10 | 2021-07-14 | Toshiba Energy Systems & Solutions Corporation | Gas turbine power generation system |
| US11441488B2 (en) | 2020-01-10 | 2022-09-13 | Toshiba Energy Systems & Solutions Corporation | Gas turbine power generation system |
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