CN209129688U - A kind of high revolving speed steam turbine of resuperheat of super-pressure 45MW - Google Patents
A kind of high revolving speed steam turbine of resuperheat of super-pressure 45MW Download PDFInfo
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- CN209129688U CN209129688U CN201821365772.5U CN201821365772U CN209129688U CN 209129688 U CN209129688 U CN 209129688U CN 201821365772 U CN201821365772 U CN 201821365772U CN 209129688 U CN209129688 U CN 209129688U
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Abstract
A kind of high revolving speed steam turbine of resuperheat of super-pressure 45MW, is related to steam turbine field.The utility model is the low problem of cycle efficieny in order to solve the level steam turbines such as existing 45MW and take up a large area.Two support members are respectively used to support high pressure cylinder and low pressure exhaust hood, rotor tail end connects reduction gearbox by diaphragm coupling, the revolving speed that rotor rotation generates drives the shaft of generator to rotate after reduction gearbox slows down, the main vapour of high pressure adjusts union valve and is arranged on the outer wall of high pressure cylinder, middle pressure reheating adjusts union valve intake valve and is arranged on the outer wall of intermediate pressure cylinder, main steam adjusts union valve by the main vapour of high pressure and enters high pressure cylinder, it is flowed out after flowing through high pressure flow by the blow-off line of high pressure cylinder lower part, the steam of outflow adjusts union valve intake valve by middle pressure reheating after boiler reheating and enters cylinder middle section, flow through mesolow it is through-flow after condenser entered by low pressure exhaust hood lower part steam drain, to complete the through-flow of steam.It is the high revolving speed steam turbine of a resuperheat.
Description
Technical field
The utility model relates to a kind of high revolving speed steam turbines of resuperheat of super-pressure 45MW, belong to steam turbine field.
Background technique
The level steam turbines molded design such as 45MW of China's active service, generally existing main vapour parameter is low, and system design and structure are set
It counts the problems such as unreasonable, at high cost, unit cycle efficieny is low, net coal consumption rate is high, and not only energy utilization rate is low but also pollution row
It is high-volume big.
Utility model content
The utility model is the low problem of cycle efficieny in order to solve the level steam turbines such as existing 45MW and take up a large area.
Now provide a kind of resuperheat of super-pressure 45MW high revolving speed steam turbine.
A kind of high revolving speed steam turbine of resuperheat of super-pressure 45MW, it include rotor, two support members, cylinder body,
The main vapour of diaphragm coupling 8, reduction gearbox 9, generator 10, high pressure adjusts union valve and middle pressure reheating adjusts union valve intake valve,
Cylinder body includes high pressure cylinder 4, cylinder middle section 5 and low pressure exhaust hood 6,
High pressure cylinder 4, cylinder middle section 5 and low pressure exhaust hood 6 are successively cased on rotor, two support members are respectively used to support
High pressure cylinder 4 and low pressure exhaust hood 6,
Rotor tail end connects reduction gearbox 9 by diaphragm coupling 8, and the revolving speed that rotor rotation generates slows down by reduction gearbox 9
The shaft rotation of generator 10 is driven afterwards,
The main vapour of high pressure adjusts union valve and is arranged on the outer wall of high pressure cylinder 4, and middle pressure reheating adjusts the setting of union valve intake valve
On the outer wall of intermediate pressure cylinder 5,
Main steam adjusts union valve by the main vapour of high pressure and enters high pressure cylinder 4, flows through after high pressure flow by 4 lower part of high pressure cylinder
Blow-off line outflow, the steam of outflow adjust union valve intake valve by middle pressure reheating after boiler reheating and enter cylinder middle section 5,
Flow through mesolow it is through-flow after condenser entered by 6 lower part steam drain of low pressure exhaust hood, to complete the through-flow process of steam.
The utility model has the following beneficial effects:
The steam-turbine unit of the application is designed using high revolving speed, high, medium and low pressing cylinder, front bearing box landing arrangement, rear axle
It holds case and exhaust casing is welded as entirety to save shafting length.In addition, the unilateral downward steam discharge of low pressure exhaust hood, it is long to shorten shafting
Degree shortens unit length under the premise of guaranteeing that unit has high circulation efficiency, high security to greatest extent, reduces unit
Occupied area saves space, reduces power plant construction cost.Meanwhile high pressure entirety inner casing, steam admission mode use 360 ° of tangential snails
Shell guarantees into the horizontal stator blade of vapour collocation into vapour efficiency.
Unit uses full admission, and the main vapour of high pressure adjusts union valve and high pressure cylinder is direct-connected, middle pressure reheating adjusting union valve into
Air valve is direct-connected with intermediate pressure cylinder, has minimized and has lost into vapour, and has avoided more enthalpy drop and fall in inefficient impulsion
Formula governing stage, these enthalpy drops are distributed on small enthalpy drop reactionary style pressure stage, can obtain higher stage efficiency；
The whole stator blades of high, middle pressure, movable vane use pretwist fabricated construction, compared with traditional welding partition, fabricated construction
There is no weld seam, avoid welding deformation, better assures that through-flow precision；
Compared with existing 45MW grade cylinder of steam turbine, improve unit steam inlet condition to 13.24MPa/566 DEG C/566 DEG C,
Fundamentally improve cycle efficieny.
The absolute dead point of the application is designed after low pressure exhaust hood at pedestal, is the absolute dead point of expansion of entire unit.Subtract
On the basis of fast case is fixed on by pedestal, setting thrust radial journal bearing is as the absolute dead point of reduction gearbox rotor in reduction gearbox.Steamer
It designs at front bearing box thrust bearing at the relative expansion dead point of machine rotor.High pressure cylinder, intermediate pressure cylinder, low pressure exhaust hood during operation
End expansion is adjusted, cylinder pushes front bearing box to slide by the beam that centers, and turbine rotor is expanded to electric end.Turbine rotor with subtract
Diaphragm coupling is set between fast case rotor for swollen difference between two rotor clutches during absorbing hot operation.Speed reduction gear box uses
Double-helical-tooth makes thrust self-balancing.To make entire set structure stablize.
Detailed description of the invention
Fig. 1 is a kind of vertical section structure schematic diagram of the high revolving speed steam turbine of resuperheat of super-pressure 45MW,
Fig. 2 is entire steam-turbine unit arrangement schematic diagram,
Fig. 3 is the top view of Fig. 2,
Fig. 4 is high pressure inner casing entity side view,
Fig. 5 is high pressure inner casing entity top view,
Fig. 6 is to calculate motion pattern into vapour spiral case CFD (fluid dynamics),
Fig. 7 is to calculate middle section Mach Number Distribution figure into vapour spiral case CFD,
Fig. 8 is to calculate middle section pressure-plotting into vapour spiral case CFD.
Specific embodiment
Specific embodiment 1: illustrating present embodiment referring to figs. 1 to Fig. 5, one kind described in present embodiment is super
The high revolving speed steam turbine of resuperheat of high pressure 45MW, it includes rotor, two support members, cylinder body, diaphragm coupling 8, subtracts
The main vapour of fast case 9, generator 10, high pressure adjusts union valve and middle pressure reheating adjusts union valve intake valve,
Cylinder body includes high pressure cylinder 4, cylinder middle section 5 and low pressure exhaust hood 6,
High pressure cylinder 4, cylinder middle section 5 and low pressure exhaust hood 6 are successively cased on rotor, two support members are respectively used to support
High pressure cylinder 4 and low pressure exhaust hood 6,
Rotor tail end connects reduction gearbox 9 by diaphragm coupling 8, and the revolving speed that rotor rotation generates slows down by reduction gearbox 9
The shaft rotation of generator 10 is driven afterwards,
The main vapour of high pressure adjusts union valve and is arranged on the outer wall of high pressure cylinder 4, and middle pressure reheating adjusts the setting of union valve intake valve
On the outer wall of intermediate pressure cylinder 5,
Main steam adjusts union valve by the main vapour of high pressure and enters high pressure cylinder 4, flows through after high pressure flow by 4 lower part of high pressure cylinder
Blow-off line outflow, the steam of outflow adjust union valve intake valve by middle pressure reheating after boiler reheating and enter cylinder middle section 5,
Flow through mesolow it is through-flow after condenser entered by 6 lower part steam drain of low pressure exhaust hood, to complete the through-flow process of steam.
In present embodiment, front bearing box landing arrangement, rear bearing case is welded as whole long to save shafting with exhaust casing
Degree.Rotor is divided into high-temperature region and two sections of low-temperature space, two-stage rotor, tightly, makes full use of material property using bolt.Steam turbine
It exports using high Design of Rotation, and after being slowed down using reduction gearbox to generator.Rotor supports are in preceding radial journal bearing and rear supporting axis
It holds, and absorbs the swollen difference of shafting using diaphragm coupling.Unit is designed using no steam guiding tube.
Low pressure exhaust hood 6 uses steel plate butt welding structure.
The main vapour of high pressure adjusts union valve and high pressure cylinder 4 uses flanged joint, and middle pressure reheating adjusts union valve intake valve in
Cylinder pressure 5 uses flanged joint.
Specific embodiment 2: present embodiment is in primary to a kind of super-pressure 45MW described in specific embodiment one
Between the high revolving speed steam turbine of reheating be described further, in present embodiment, two support members include two bearings and two axis
Case is held,
Bearing includes fore bearing 11 and rear bearing 12, and bearing housing includes front bearing box 3 and rear bearing case 7,
The head end side wall and tail end side wall of rotor are respectively supported on fore bearing 11 and rear bearing 12, fore bearing 11 and high pressure
Cylinder 4 adjusts end to be each attached on front bearing box 3, and rear bearing 12 and low pressure exhaust hood 6 adjust end to be each attached on rear bearing case 7.
Specific embodiment 3: present embodiment is in primary to a kind of super-pressure 45MW described in specific embodiment two
Between the high revolving speed steam turbine of reheating be described further, in present embodiment, it further includes pedestal,
Two bearing housings are supported on pedestal.
Specific embodiment 4: present embodiment is in primary to a kind of super-pressure 45MW described in specific embodiment two
Between the high revolving speed steam turbine of reheating be described further, in present embodiment, rotor includes high pressure rotor 1 and mesolow rotor 2,
It is connected between high pressure rotor 1 and mesolow rotor 2 using flange bolt,
High pressure rotor 1 adjusts end to be supported on fore bearing 11, and the electric end of mesolow rotor 2 is supported in rear bearing 12.
In present embodiment, high pressure rotor 1 and turbine rotor 2 are integral rotor, high pressure rotor 1 and turbine rotor
2 have different mechanical performances, have not only met the elevated temperature strength requirement of high temperature section, but also meet the high-intensitive and low crisp of low-temperature zone
The performance of sex reversal temperature value.
Steam turbine in the application is by 7 grades of backheat designs, wherein the 1st, 2,3,4 grade of backheat design is in high pressure cylinder, the 5th, 6,7
The design of grade backheat is oxygen-eliminating device in mesolow cylinder, the 4th grade of backheat.
Specific embodiment 5: present embodiment is in primary to a kind of super-pressure 45MW described in specific embodiment two
Between the high revolving speed steam turbine of reheating be described further, in present embodiment, high pressure cylinder 4 adjusts end by lower ram's horn to be supported on fore bearing
On case 3,4 bottom end of high pressure cylinder passes through beam 13 and 3 axial restraint of front bearing box of centering.
Specific embodiment 6: present embodiment is in primary to a kind of super-pressure 45MW described in specific embodiment one
Between the high revolving speed steam turbine of reheating be described further, in present embodiment, high pressure cylinder 4 be double shell structure.
In present embodiment, high pressure uses double shell structure, adapts to the high-temperature work environment feature of unit, guarantees that cylinder body is strong
Spend, good rigidity, thermal stress it is small, the inside and outside cylinder of high pressure is casting, using high narrow flange arrangement, to adapt to unit quick start
Needs.High pressure entirety inner casing, steam admission mode are guaranteed into the horizontal stator blade of vapour collocation into vapour efficiency using 360 ° of tangential spiral cases.From
Fig. 6 is into Fig. 8, it can be seen that the flow velocity of steam.
Claims (6)
1. a kind of high revolving speed steam turbine of resuperheat of super-pressure 45MW, which is characterized in that it includes rotor, two support portions
The main vapour of part, cylinder body, diaphragm coupling (8), reduction gearbox (9), generator (10), high pressure adjusts union valve and middle pressure reheating adjusts connection
Valve intake valve is closed,
Cylinder body includes high pressure cylinder (4), cylinder middle section (5) and low pressure exhaust hood (6),
High pressure cylinder (4), cylinder middle section (5) and low pressure exhaust hood (6) are successively cased on rotor, two support members are respectively used to prop up
High pressure cylinder (4) and low pressure exhaust hood (6) are supportted,
By diaphragm coupling (8) connection reduction gearbox (9), the revolving speed that rotor rotation generates subtracts rotor tail end by reduction gearbox (9)
The shaft rotation of generator (10) is driven after speed,
The main vapour of high pressure adjusts union valve and is arranged on the outer wall of high pressure cylinder (4), and middle pressure reheating adjusts the setting of union valve intake valve and exists
On the outer wall of intermediate pressure cylinder (5),
Main steam adjusts union valve by the main vapour of high pressure and enters high pressure cylinder (4), flows through after high pressure flow by high pressure cylinder (4) lower part
Blow-off line outflow, the steam of outflow adjust union valve intake valve by middle pressure reheating after boiler reheating and enter cylinder middle section
(5), flow through mesolow it is through-flow after condenser entered by low pressure exhaust hood (6) lower part steam drain, to complete the through-flow mistake of steam
Journey.
2. a kind of high revolving speed steam turbine of resuperheat of super-pressure 45MW according to claim 1, which is characterized in that two
A support member includes two bearings and two bearing housings,
Bearing includes fore bearing (11) and rear bearing (12), and bearing housing includes front bearing box (3) and rear bearing case (7),
The head end side wall and tail end side wall of rotor are respectively supported on fore bearing (11) and rear bearing (12), fore bearing (11) and height
Cylinder pressure (4) adjusts end to be each attached on front bearing box (3), and rear bearing (12) and low pressure exhaust hood (6) adjust end to be each attached to rear bearing
On case (7).
3. a kind of high revolving speed steam turbine of resuperheat of super-pressure 45MW according to claim 2, which is characterized in that it
It further include pedestal,
Two bearing housings are supported on pedestal.
4. a kind of high revolving speed steam turbine of resuperheat of super-pressure 45MW according to claim 2, which is characterized in that turn
Attached bag includes high pressure rotor (1) and mesolow rotor (2),
It is connected between high pressure rotor (1) and mesolow rotor (2) using flange bolt,
High pressure rotor (1) adjusts end to be supported on fore bearing (11), and mesolow rotor (2) electricity end is supported on rear bearing (12).
5. a kind of high revolving speed steam turbine of resuperheat of super-pressure 45MW according to claim 2, which is characterized in that high
Cylinder pressure (4) adjusts end to be supported on front bearing box (3) by lower ram's horn, and high pressure cylinder (4) bottom end passes through the beam that centers (13) and front axle
Hold case (3) axial restraint.
6. a kind of high revolving speed steam turbine of resuperheat of super-pressure 45MW according to claim 1, which is characterized in that high
Cylinder pressure (4) is double shell structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821365772.5U CN209129688U (en) | 2018-08-23 | 2018-08-23 | A kind of high revolving speed steam turbine of resuperheat of super-pressure 45MW |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201821365772.5U CN209129688U (en) | 2018-08-23 | 2018-08-23 | A kind of high revolving speed steam turbine of resuperheat of super-pressure 45MW |
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| CN209129688U true CN209129688U (en) | 2019-07-19 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162765A (en) * | 2018-08-23 | 2019-01-08 | 哈尔滨汽轮机厂有限责任公司 | A kind of high revolving speed steam turbine of resuperheat of super-pressure 45MW |
| CN112096457A (en) * | 2020-10-10 | 2020-12-18 | 中国长江动力集团有限公司 | Sub-high pressure high rotation speed condensing steam turbine |
| CN113669118A (en) * | 2021-09-23 | 2021-11-19 | 哈尔滨汽轮机厂有限责任公司 | 100MW single-cylinder air-cooling photo-thermal steam turbine |
-
2018
- 2018-08-23 CN CN201821365772.5U patent/CN209129688U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109162765A (en) * | 2018-08-23 | 2019-01-08 | 哈尔滨汽轮机厂有限责任公司 | A kind of high revolving speed steam turbine of resuperheat of super-pressure 45MW |
| CN109162765B (en) * | 2018-08-23 | 2023-10-10 | 哈尔滨汽轮机厂有限责任公司 | Ultrahigh-pressure 45MW once intermediate reheating high-rotation-speed steam turbine |
| CN112096457A (en) * | 2020-10-10 | 2020-12-18 | 中国长江动力集团有限公司 | Sub-high pressure high rotation speed condensing steam turbine |
| CN113669118A (en) * | 2021-09-23 | 2021-11-19 | 哈尔滨汽轮机厂有限责任公司 | 100MW single-cylinder air-cooling photo-thermal steam turbine |
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