CN207470237U - A kind of double rotating speed extraction condensing back pressure formula steam turbines - Google Patents
A kind of double rotating speed extraction condensing back pressure formula steam turbines Download PDFInfo
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- CN207470237U CN207470237U CN201721387354.1U CN201721387354U CN207470237U CN 207470237 U CN207470237 U CN 207470237U CN 201721387354 U CN201721387354 U CN 201721387354U CN 207470237 U CN207470237 U CN 207470237U
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Abstract
A kind of double rotating speed extraction condensing back pressure formula steam turbines, including bearing housing after bearing housing, low pressure shaft coupling, timing clutch, clutch short axle, steam turbine generator, low speed segment shaft coupling, gear reduction box, high regime shaft coupling, high-pressure unit front bearing box, high-pressure turbine, high-pressure unit after low-pressure machine front bearing box, low-pressure turbine, low-pressure machine.High-pressure turbine Design of Rotation is decelerated to by reduction gear box and is connect with generator with after rotating speed with steam turbine generator one end into high rotating speed, low-pressure turbine rotating speed and the same rotating speed of steam turbine generator.High-pressure turbine uses high rotating speed, under the conditions of little volume flow, can reduce through-flow diameter, improve blade height, improves turbine efficiency, and low-pressure turbine uses conventional rotating speed, and blade height is high, and the structural library of universal mature may be used, and shortens the design duration.
Description
Technical field
The utility model is related to steam turbine field, more particularly to a kind of double rotating speed extraction condensing back pressure formula steam turbines.
Background technology
As the Core equipment of thermal power generation, the technology and product of steam turbine will be to improve efficiency as target, in high temperature material
A completely new development has been welcome on the basis of the development of material and related advanced technology.The emphasis of Development of Thermal Power Plant Engineering of new generation is
The designing technique of new product is promoted, the optimization of manufacturing processing technic and therrmodynamic system is related to promotion, the channel of steam parameter
Optimization, cold end optimization etc. field.
Traditional cogeneration turbine is back pressure turbine, sucking condensing turbine.Therefore, it is supplied to meet energy unit
The maximized demand of heat, it is desirable that steamer function meets condensing, three kinds of steam extraction, back pressure modes are run.When thermic load is relatively low, steam turbine
Steam extraction amount can meet thermal load demands, and unit may be used the solidifying mode of pumping and run.With the lasting rising of thermal load demands, that is, work as
When unit thermic load is more than unit design maximum steam extraction amount, Steam Turbine can be high by automatic clutch by low-pressure section off-the-line
Laminate section back pressure mode is run, and such high-pressure section steam discharge can be completely used for meeting thermal load demands；And when thermic load continues
During reduction, Steam Turbine can be arranged side by side by low-pressure section by automatic clutch, and Steam Turbine may be used back pressure mode, take out solidifying side
Formula, pure condensate mode are run.
Utility model content
In view of this, the main purpose of the utility model is that providing a kind of double rotating speed extraction condensing back pressure formula steam turbines, to solve
The requirement that three kinds of condensing, steam extraction, back pressure modes are run.
To achieve these goals, as the one side of the utility model, the utility model provides a kind of double rotating speeds
Extraction condensing back pressure formula steam turbine, wherein low-pressure turbine, steam turbine generator and high-pressure turbine including rotation connection, low-pressure turbine
It is connected by low pressure shaft coupling with timing clutch, timing clutch is connected with short axle, short axle and steam turbine generator one end
Directly it is rigidly connected.High-pressure turbine is connected by high regime shaft coupling with gear reduction box, and gear reduction box output terminal leads to
Low speed segment shaft coupling is crossed to connect with the steam turbine generator other end.
Preferably, double rotating speed extraction condensing back pressure formula steam turbines further include bearing housing, height after low-pressure machine front bearing box, low-pressure machine
Bearing housing after press front bearing box, high-pressure unit is mounted on using landing structure in rack, and low-pressure turbine passes through cat under leading portion
Pawl is supported on low-pressure machine front bearing box, on the basis of low-pressure turbine exhaust casing is mounted on using landing structure, high-pressure turbine
It is supported on after high-pressure unit front bearing box and high-pressure unit on bearing housing by upper ram's horn.
Preferably, low-pressure turbine and the same rotating speed of steam turbine generator, high-pressure turbine is different from steam turbine generator rotating speed, high
Press turbine speed by after gear reduction box speed change with the same rotating speed of steam turbine generator.
Preferably, low-pressure turbine be single process cylinder, high-pressure turbine be internal reflux cooling shunting cylinder, low pressure steamer
Machine rotor is supported by the journal bearing in bearing housing after low-pressure machine front bearing box and low-pressure machine, and high-pressure turbine rotor passes through height
Journal bearing bearing after press front bearing box and high-pressure unit in bearing housing.
Preferably, the main vapour of extraction condensing back pressure formula steam turbine adjusts joint valve seat above the outer shell of high-pressure turbine, main vapour tune
Union valve is saved with the outer shell in high-pressure turbine using welding structure, main vapour adjusts union valve and connects with main steam steam guiding tube flange
It connects.
Preferably, the main vapour of the middle pressure of extraction condensing back pressure formula steam turbine adjusts union valve and is located at below low-pressure turbine.
Preferably, the downward steam discharge of high-pressure turbine, low-pressure turbine lower part into vapour, low-pressure turbine and high-pressure turbine it
Between set mesolow cross over pipe.
Preferably, low-pressure turbine, high-pressure turbine are horizontal flange structure, low-pressure turbine, high-pressure turbine
Cylinder on lower half connected by stud.
Preferably, low-pressure turbine and low-pressure machine front bearing box lower half are provided with vertical push-and-pull beam, it is vertical push and pull beam with
Bearing housing axial restraint, high-pressure turbine are provided with vertical push-and-pull with bearing housing lower half after high-pressure unit front bearing box, high-pressure unit
Beam, it is vertical to push and pull beam and bearing housing axial restraint.
Preferably, the low pressure rotor of low-pressure turbine and timing clutch rotor, short axle, rotor of steam turbo generator, low speed
Section shaft coupling, gear reduction box slow-speed shaft composition low speed shafting, the high pressure rotor and The gear deceleration case high speed axis of high-pressure turbine,
High regime shaft coupling forms high speed shafting.
The utility model has the advantages that compared with prior art：
(1) a kind of double rotating speed extraction condensing back pressure formula steam turbines of the utility model take full advantage of multistage reactionary style technical advantage,
Efficiency improves 2.5~4%；
(2) high-pressure turbine uses high rotating speed, under the conditions of little volume flow, can reduce through-flow diameter, improve blade
Highly, turbine efficiency is improved；
(3) high-pressure turbine uses dual-layer air cylinder structure, reduces cylinder leakage vapour, axial locating surface leakage vapour；
(4) all stator blades use fabricated construction in high-pressure turbine high-pressure inner cylinder and diaphragm housing ring, it is ensured that manufacture
Precision；
(5) low-pressure turbine uses conventional rotating speed, and blade height is high, the structural library of universal mature may be used, shortening is set
Count the duration；
(6) the utility model is adjusted through-flow labyrinth clearance, and high-pressure turbine uses small―gap suture inserted-blade type packing；
(7) main steam control valve seat is on outer shell, it is possible to reduce harmful volume reduces removal of load rotor and ascends to heaven rate；
(8) bearing housing is to fall after bearing housing, high-pressure unit front bearing box, high-pressure unit after low-pressure machine front bearing box, low-pressure machine
Ground structure is run small on the influence of steam turbine center absolute altitude；
(9) extraction valve is set on high-low pressure cross over pipe, and bypass start-up system, cooperation timing clutch is, it can be achieved that pure condensate, pumping
Solidifying, three kinds of methods of operation of back pressure meet " heating load maximization " requirement.
Description of the drawings
Fig. 1 is the steam turbine overall structure diagram of the utility model；
Fig. 2 is the structure diagram of the high-pressure turbine in the utility model；
【Reference sign】：
1- low-pressure machine front bearing boxes；2- low-pressure turbines；Bearing housing after 3- low-pressure machines；4- low pressure shaft couplings；5- synchronize from
Clutch；6- short axles；7- steam turbine generators；8- low speed segment shaft couplings；9- gear reduction boxs；10- high regime shaft couplings；11- high pressures
Machine front bearing box；12- high-pressure turbines；Bearing housing after 13- high-pressure units；14- high-pressure inner cylinders；15- diaphragm housing rings；16- hp outer cylinders.
Specific embodiment
For the purpose of this utility model, technical solution and advantage is made clearly to illustrate, below in conjunction with specific embodiment,
And with reference to attached drawing, the utility model is further described.
As shown in Figure 1, the utility model provides a kind of double rotating speed extraction condensing back pressure formula steam turbines, including low-pressure machine front bearing box
1st, bearing housing 3, low pressure shaft coupling 4, timing clutch 5, short axle 6, steam turbine generator 7, low speed after low-pressure turbine 2, low-pressure machine
Section shaft coupling 8, gear reduction box 9, high regime shaft coupling 10, high-pressure unit front bearing box 11, high-pressure turbine 12, high-pressure unit rear axle
Hold case 13.
Bearing housing 13 is adopted after bearing housing 3, high-pressure unit front bearing box 11, high-pressure unit after low-pressure machine front bearing box 1, low-pressure machine
It is mounted in rack with landing structure, low-pressure turbine 2 is supported on by ram's horn under leading portion on low-pressure machine front bearing box 1, low pressure
On the basis of the exhaust casing of steam turbine 2 is mounted on using landing structure, before high-pressure turbine 12 is supported on high-pressure unit by upper ram's horn
After bearing housing 11 and high-pressure unit 13 on bearing housing.
2 rotor of low-pressure turbine, 12 rotor of high-pressure turbine are dual-support structure.Low-pressure turbine 2 is joined by low pressure
Axis device 4 is connected with timing clutch 5, and timing clutch 5 is connected with short axle 6, and short axle 6 and 7 one end of steam turbine generator are direct
Rigid connection.High-pressure turbine 12 is connected by high regime shaft coupling 10 with gear reduction box 9,9 output terminal of gear reduction box
It is connect by low speed segment shaft coupling 8 with 7 other end of steam turbine generator.
Low-pressure turbine 2, high-pressure turbine 12 be horizontal flange structure, low-pressure turbine 2, high-pressure turbine 12
Lower half is connected by stud on cylinder.
Low-pressure turbine 2 be single process cylinder, high-pressure turbine 12 be internal reflux cooling shunting cylinder, low-pressure turbine 2
Rotor is supported by the journal bearing in bearing housing after low-pressure machine front bearing box and low-pressure machine, and 12 rotor of high-pressure turbine passes through height
Journal bearing bearing after press front bearing box and high-pressure unit in bearing housing.
As shown in Fig. 2, the high-pressure turbine 12 includes high-pressure inner cylinder 14, diaphragm housing ring 15, hp outer cylinder 16, high pressure
Inner casing 14 is cast as one with high pressure steam room, and high pressure steam room is full admission, and in upper half, there are two air intake, vertical direction cloth
It puts, is connected with two regulating valve ventholes.
Hp outer cylinder 16 and high-pressure inner cylinder 14, diaphragm housing ring 15 form the runner of different directions, hp outer cylinder 16 in high pressure
The runner steam reverse snapback postcooling high-pressure inner cylinder 14 that cylinder 14 is formed, and enter diaphragm housing ring 14.
All stator blades use fabricated construction in the high-pressure inner cylinder 14 of high-pressure turbine 12 and diaphragm housing ring 15.
The thermal stress distribution of cylinder can be improved using double shell structure, improve adaptability of the unit to load variations.It is high
Press that the hp outer cylinder 16 of steam turbine, 14 cylinders, diaphragm housing ring 15 are designed as horizontal flange structure in high pressure, with stud by cylinder
Upper and lower half-connection is got up, and the ram's horn for passing through the stretching of 16 upper half of hp outer cylinder is supported on two bearing housings of high-pressure turbine 12
On bearing.
The main vapour of extraction condensing back pressure formula steam turbine adjusts joint valve seat above the hp outer cylinder 16 of high-pressure turbine 12, main vapour tune
Union valve is saved with the hp outer cylinder 16 in high-pressure turbine 12 using welding structure, main vapour adjusts union valve and main steam steam guiding tube
Flanged joint.
The main vapour of middle pressure of extraction condensing back pressure formula steam turbine adjusts union valve and is located at 2 lower section of low-pressure turbine.High-pressure turbine 12 with
7 rotating speed of steam turbine generator is different, 12 rotating speed of high-pressure turbine by after 9 speed change of gear reduction box with 7 same rotating speed of steam turbine generator；
Low-pressure turbine 2 and 7 same rotating speed of steam turbine generator, low-pressure turbine 2 pass through timing clutch 5, short axle 6 and steamer
Generator 7 is connected；
12 downward steam discharge of high-pressure turbine, 2 lower part of low-pressure turbine into vapour, low-pressure turbine 2 and high-pressure turbine 12 it
Between mesolow cross over pipe is set, bypass start-up system is set on mesolow cross over pipe, coordinates timing clutch 5, can be steadily quick
Ground is incorporated to and disengages low-pressure turbine；Extraction valve is set on high-low pressure cross over pipe, bypass start-up system coordinates timing clutch,
Pure condensate can be achieved, take out solidifying, three kinds of methods of operation of back pressure, meet " heating load maximization " requirement；
Low-pressure turbine 2 is provided with vertical push-and-pull beam with 1 lower half of low-pressure machine front bearing box, vertical to push and pull beam and bearing housing
Axial restraint, high-pressure turbine 12 are provided with vertical push-and-pull with 13 lower half of bearing housing after high-pressure unit front bearing box 11, high-pressure unit
Beam, it is vertical to push and pull beam and bearing housing axial restraint.
The low pressure rotor of low-pressure turbine 2 and 5 rotor of timing clutch, short axle 6, the rotor of steam turbine generator 7, low speed segment
The slow-speed shaft composition low speed shafting of shaft coupling 8, gear reduction box 9, high pressure rotor and the gear reduction box 9 of high-pressure turbine 12
High speed shaft, high regime shaft coupling 10 form high speed shafting.
Particular embodiments described above has made further the purpose of this utility model, technical solution and advantageous effect
Ground is described in detail, it should be understood that the foregoing is merely specific embodiment of the utility model, is not limited to this
Utility model, within the spirit and principle of the utility model, any modification, equivalent substitution, improvement and etc. done should all wrap
Containing being within the protection scope of the utility model.
Claims (10)
1. a kind of double rotating speed extraction condensing back pressure formula steam turbines, it is characterised in that：Low-pressure turbine (2) including rotation connection, steamer hair
Motor (7) and high-pressure turbine (12), wherein low-pressure turbine (2) are connected by low pressure shaft coupling (4) with timing clutch (5)
It connects, timing clutch (5) is connected with short axle (6), and short axle (6) and one end of steam turbine generator (7) are directly rigidly connected, high pressure
Steam turbine (12) is connected by high regime shaft coupling (10) with gear reduction box (9), and gear reduction box (9) output terminal passes through low
Fast section shaft coupling (8) connect with steam turbine generator (7) other end.
2. double rotating speed extraction condensing back pressure formula steam turbines as described in claim 1, which is characterized in that further include low-pressure machine front bearing box
(1), bearing housing (13), use landing structure are pacified after bearing housing (3), high-pressure unit front bearing box (11) and high-pressure unit after low-pressure machine
In rack, low-pressure turbine (2) is supported on by ram's horn under leading portion on low-pressure machine front bearing box (1), low-pressure turbine (2)
On the basis of exhaust casing is mounted on using landing structure, high-pressure turbine (12) is supported on high-pressure unit front bearing box by upper ram's horn
(11) and after high-pressure unit on bearing housing (13).
3. double rotating speed extraction condensing back pressure formula steam turbines as described in claim 1, which is characterized in that low-pressure turbine (2) is sent out with steamer
Motor (7) same to rotating speed, high-pressure turbine (12) is different from steam turbine generator (7) rotating speed, and high-pressure turbine (12) rotating speed passes through tooth
Take turns reduction box (9) speed change after with steam turbine generator (7) same to rotating speed.
4. double rotating speed extraction condensing back pressure formula steam turbines as claimed in claim 2, which is characterized in that low-pressure turbine (2) is single process
Cylinder, high-pressure turbine (12) are the shunting cylinder of internal reflux cooling, and low-pressure turbine (2) rotor passes through low-pressure machine front bearing box
(1) and after low-pressure machine the journal bearing of bearing housing (3) supports, and high-pressure turbine (12) rotor passes through high-pressure unit front bearing box (11)
With the journal bearing bearing in bearing housing after high-pressure unit (13).
5. double rotating speed extraction condensing back pressure formula steam turbines as described in claim 1, which is characterized in that the main vapour tune of extraction condensing back pressure formula steam turbine
Joint valve seat is saved above the outer shell of high-pressure turbine (12), main vapour adjusts union valve with being adopted in the outer shell of high-pressure turbine (12)
With welding structure, main vapour adjusts union valve and main steam steam guiding tube flanged joint.
6. double rotating speed extraction condensing back pressure formula steam turbines as described in claim 1, which is characterized in that the middle pressure master of extraction condensing back pressure formula steam turbine
Vapour adjusts union valve and is located at below low-pressure turbine (2).
7. double rotating speed extraction condensing back pressure formula steam turbines as described in claim 1, which is characterized in that high-pressure turbine (12) is arranged downwards
Vapour, low-pressure turbine (2) lower part set mesolow cross over pipe into vapour between low-pressure turbine (2) and high-pressure turbine (12).
8. double rotating speed extraction condensing back pressure formula steam turbines as described in claim 1, which is characterized in that low-pressure turbine (2), high pressure steamer
Machine (12) is horizontal flange structure, low-pressure turbine (2), high-pressure turbine (12) cylinder on lower half pass through double end spiral shell
It tethers and connects.
9. double rotating speed extraction condensing back pressure formula steam turbines as claimed in claim 2, which is characterized in that low-pressure turbine (2) and low-pressure machine
Front bearing box (1) lower half is provided with vertical push-and-pull beam, vertical to push and pull beam and bearing housing axial restraint, high-pressure turbine (12) with
Bearing housing (13) lower half is provided with vertical push-and-pull beam after high-pressure unit front bearing box (11) and high-pressure unit, vertical to push and pull beam and bearing
Case axial restraint.
10. double rotating speed extraction condensing back pressure formula steam turbines as described in claim 1, which is characterized in that the low pressure of low-pressure turbine (2) turns
Son and timing clutch (5) rotor, short axle (6), steam turbine generator (7) rotor, low speed segment shaft coupling (8), gear reduction box (9)
Slow-speed shaft forms low speed shafting, high pressure rotor and gear reduction box (9) high speed shaft, the high regime shaft coupling of high-pressure turbine (12)
(10) high speed shafting is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721387354.1U CN207470237U (en) | 2017-10-25 | 2017-10-25 | A kind of double rotating speed extraction condensing back pressure formula steam turbines |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721387354.1U CN207470237U (en) | 2017-10-25 | 2017-10-25 | A kind of double rotating speed extraction condensing back pressure formula steam turbines |
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| Publication Number | Publication Date |
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| CN207470237U true CN207470237U (en) | 2018-06-08 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323730A (en) * | 2021-07-16 | 2021-08-31 | 哈尔滨汽轮机厂有限责任公司 | Novel 100MW reaction type steam extraction condensing steam turbine |
-
2017
- 2017-10-25 CN CN201721387354.1U patent/CN207470237U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113323730A (en) * | 2021-07-16 | 2021-08-31 | 哈尔滨汽轮机厂有限责任公司 | Novel 100MW reaction type steam extraction condensing steam turbine |
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