CN213899061U - 50MW single-cylinder air cooling photo-thermal steam turbine - Google Patents
50MW single-cylinder air cooling photo-thermal steam turbine Download PDFInfo
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- CN213899061U CN213899061U CN202023336250.2U CN202023336250U CN213899061U CN 213899061 U CN213899061 U CN 213899061U CN 202023336250 U CN202023336250 U CN 202023336250U CN 213899061 U CN213899061 U CN 213899061U
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Abstract
A50 MW single-cylinder air-cooling photo-thermal steam turbine relates to the technical field of steam turbines. The utility model discloses a solve current 50MW light and heat air cooling steam turbine unit circulation efficiency low, jar inefficiency, the totality performance is poor, the higher problem of cost. The utility model discloses a front bearing case, the rear bearing case, high-middle-low pressure closes the jar, the rotor assembly, high-pressure main steam valve, high-pressure regulating valve, middling pressure main steam valve and middling pressure governing valve, high-pressure main steam valve and middling pressure main steam valve set up the both sides at high-middle-low pressfitting jar respectively, the play steam end of high-pressure main steam valve is connected with the admission end of high-pressure regulating valve, the play steam end and the high-middle-low pressure of high-pressure regulating valve close the main steam inlet of jar and be connected, the play steam end and the admission end of middling pressure governing valve of middling pressure main steam valve are connected, the play steam end and the high-middle-low pressure of middling pressure regulating valve close the middling pressure steam inlet intercommunication of jar, rotor assembly and high-middle-low pressure close by being equipped with high-middle-low pressure through-flow and middling pressure through-flow in proper order after to between the jar. The utility model is used for steam does work.
Description
Technical Field
The utility model belongs to the technical field of the steam turbine, concretely relates to 50MW single cylinder air cooling light and heat steam turbine.
Background
The steam turbine is also called as a steam turbine engine, and is a rotary steam power device.A high-temperature high-pressure steam passes through a fixed nozzle to become an accelerated airflow and then is sprayed onto blades, so that a rotor provided with blade rows rotates, and simultaneously, the rotor does work outwards. Steam turbines are the main equipment of modern thermal power plants, and are also used in the metallurgical industry, chemical industry and ship power plants. The existing 50MW photo-thermal air cooling steam turbine is designed and formed earlier and has a large optimization space. In addition, the structural design is not reasonable, the unit has low circulation efficiency and cylinder efficiency, the overall performance is poor, and the cost is high.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a solve present 50MW light and heat air cooling steam turbine unit circulation efficiency low, jar inefficiency, the totality performance is poor, the higher problem of cost, and then provide a 50MW single cylinder air cooling light and heat steam turbine.
The technical scheme provided by the application for solving the problems is as follows:
it comprises a front bearing box, a rear bearing box, a high-medium-low pressure combined cylinder and a rotor assembly, the high-pressure main steam valve and the medium-pressure main steam valve are respectively arranged on two sides of the high-medium low-pressure fit cylinder, a steam outlet end of the high-pressure main steam valve is connected with a steam inlet end of the high-pressure adjusting valve, a steam outlet end of the high-pressure adjusting valve is connected with a main steam inlet of the high-medium low-pressure fit cylinder, a steam outlet end of the medium-pressure main steam valve is connected with a steam inlet end of the medium-pressure adjusting valve, a steam outlet end of the medium-pressure adjusting valve is communicated with a medium-pressure steam inlet of the high-medium low-pressure fit cylinder, and high-pressure and medium-low-pressure through flows are sequentially arranged between the rotor assembly and the high-medium low-pressure fit cylinder from first to last.
Compared with the prior art, the utility model following beneficial effect has:
1. the steam inlet parameter of the unit of the utility model is 16.7MPa/566 ℃/566 ℃, and the circulation efficiency is fundamentally improved;
2. the utility model discloses the unit closes the jar design for high-medium low pressure, and the single cylinder is efficient, and the downward steam extraction of low pressure steam extraction jar unilateral. The shafting length is shortened, the unit length is shortened to the maximum extent on the premise of ensuring high cycle efficiency and high safety of the unit, the occupied area of the unit is reduced, the space is saved, and the construction cost of a power plant is reduced.
3. The utility model discloses the unit adopts the nozzle to adjust the admission, can guarantee unit quick adjustment load and admission volume effectively, improves regulation level rear pressure simultaneously as far as possible, reduces the doing work proportion of regulation level, and then improves the economic nature of unit.
4. The utility model discloses except that the last two-stage baffle of low pressure, all the quiet leaf of all the other height, well, low pressure, movable blade adopt to turn round the assembled structure in advance, compare with traditional welding baffle, and the assembled structure does not have the welding seam, avoids welding deformation, has guaranteed the through-flow precision better.
5. On the basis of meeting the needs to 50MW air cooling light and heat steam turbine, develop single cylinder steam turbine, this steam turbine jar is efficient, and the circulation efficiency is high, cost control is low. Can effectively improve the market competitiveness.
Drawings
FIG. 1 is a schematic diagram of the overall structure of the present invention in longitudinal section;
FIG. 2 is a front view of the overall structure of the present invention;
FIG. 3 is a top view of FIG. 2;
FIG. 4 is a left side view of FIG. 2;
fig. 5 is a schematic view of the expansion of the present invention, wherein the direction of the open arrows indicates the direction of expansion of the rotor and the direction of the solid arrows indicates the direction of expansion of the cylinder.
Detailed Description
The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 5, and the embodiment provides a 50MW single-cylinder air-cooled photo-thermal turbine, which comprises a front bearing box 1, a rear bearing box 2, a high-medium low-pressure combined cylinder 3, a rotor assembly 4, a high-pressure main steam valve 5, a high-pressure regulating valve 6, a medium-pressure main steam valve 7 and a medium-pressure regulating valve 8, wherein the front bearing box 1 is arranged close to the high-pressure side of the high-medium low-pressure combined cylinder 3, the rear bearing box 2 is arranged close to the low-pressure side of the high-medium low-pressure combined cylinder 3, the rotor assembly 4 is sequentially arranged in the front bearing box 1, the high-medium low-pressure combined cylinder 3 and the rear bearing box 2, the high-pressure main steam valve 5 and the medium-pressure main steam valve 7 are respectively arranged at two sides of the high-medium low-pressure combined cylinder 3, the steam outlet of the high-pressure main steam valve 5 is connected with the steam inlet of the high-pressure regulating valve 6, the steam outlet of the high-pressure regulating valve 6 is connected with the, the steam outlet end of the medium pressure regulating valve 8 is communicated with the medium pressure steam inlet of the high, medium and low pressure combination cylinder 3, and a high pressure through flow 9 and a medium and low pressure through flow 10 are sequentially arranged between the rotor assembly 4 and the high, medium and low pressure combination cylinder 3 from first to last.
In the embodiment, the steam inlet end of the high-pressure main steam valve 5 is communicated with a boiler superheater, and the steam inlet end of the medium-pressure main steam valve 7 is communicated with a boiler reheater.
In the embodiment, a high-pressure end steam seal is arranged on the high-pressure side of the high-medium low-pressure combination cylinder 3, and a low-pressure end steam seal is arranged on the low-pressure side of the high-medium low-pressure combination cylinder 3.
The high-medium-low pressure cylinder 3 comprises a high-pressure module, a medium-pressure module and a low-pressure module, a high-pressure through flow 9 is arranged in the high-pressure module, and a medium-low pressure through flow 10 is arranged in the medium-pressure module and the low-pressure module.
In the embodiment, two clapboards are installed at the end part of the rotor assembly 4 close to the rear bearing box 2, and the stator blades and the rotor blades are installed between the rotor assemblies 4 in the high-middle-low pressure combination cylinder 3 by adopting a pre-twisted assembly structure. Compared with the traditional welding partition plate, the assembly type structure has no welding line, avoids welding deformation and better ensures the through-flow precision.
The unit adopts the steam guide pipe design, and steam reentries high-pressure regulating valve 6 after high-pressure main steam valve 5, and every high-pressure regulating valve 6 back corresponds the regulation level nozzle of a certain quantity only, controls the main steam through the quantity of opening and the aperture of high-pressure regulating valve 6 and gets into the flow of high-pressure module. The steam flows through the high-pressure through-flow 9 and then flows out from a steam exhaust pipeline at the lower part of the high-pressure module; the steam reheated by the boiler enters a medium-pressure main steam valve 7 and a medium-pressure regulating valve 8, then enters a medium-pressure module, flows through a medium-low pressure through-flow 10, and then enters a condenser from a steam outlet at the lower part of a steam exhaust cylinder.
The second embodiment is as follows: the embodiment is described with reference to fig. 1 to 5, and provides a 50MW single-cylinder air-cooled photothermal turbine, wherein the high-pressure through flow 9 comprises 1-stage regulation stage and 14-stage pressure stage, and the medium-low pressure through flow 10 comprises 17-stage pressure stage. Other components and connection modes are the same as those of the first embodiment.
The third concrete implementation mode: the embodiment is described with reference to fig. 1 to 5, and provides a 50MW single-cylinder air-cooled photothermal turbine, the high-pressure regulating valve 6 is communicated with the high-medium low-pressure combined cylinder 3 through two high-pressure steam inlet air guide pipes 11, two parts of the top and the bottom of the high-medium low-pressure combined cylinder 3 are respectively provided with a main steam inlet, the main steam inlet is respectively provided with a high-pressure steam inlet insertion pipe 12, one high-pressure steam inlet air guide pipe 11 is communicated with the high-pressure steam inlet insertion pipe 12 at the top of the high-medium low-pressure combined cylinder 3, the other high-pressure steam inlet air guide pipe 11 is communicated with the high-pressure steam inlet insertion pipe 12 at the bottom of the high-medium low-pressure combined cylinder 3, the medium-pressure regulating valve 8 is communicated with the high-medium low-pressure combined cylinder 3 through two medium-pressure steam inlet air guide pipes 13, the bottom of the high-medium low-pressure combined cylinder 3 is provided with two medium-pressure steam inlets, the medium-pressure steam inlet insertion pipes 14 are arranged on the medium-pressure steam inlet, and each medium-pressure steam inlet air guide pipe 13 is respectively communicated with one medium-pressure steam inlet insertion pipe 14. Other components and connection modes are the same as those of the first embodiment.
The fourth concrete implementation mode: the embodiment is described with reference to fig. 1 to 5, and provides a 50MW single-cylinder air-cooled photothermal steam turbine, wherein a plurality of regulating stage nozzles are arranged at the steam outlet end of the high-pressure steam inlet gas guide pipe 11, and the high-pressure steam inlet gas guide pipe 11 is communicated with the high-pressure steam inlet insertion pipe 12 through the plurality of regulating stage nozzles. Other components and connection modes are the same as those of the third embodiment.
The fifth concrete implementation mode: the embodiment is described with reference to fig. 1 to 5, and provides a 50MW single-cylinder air-cooled photothermal steam turbine, wherein the rotor assembly 4 comprises a high-temperature section rotor and a low-temperature section rotor, and the high-temperature section rotor and the low-temperature section rotor are fixedly connected through bolts. Other components and connection modes are the same as those of the first embodiment.
The high-temperature section rotor is arranged in the high-pressure module and the middle-pressure module, the low-temperature section rotor is arranged in the low-pressure module, the front section and the rear section have different mechanical properties, the high-temperature strength requirement of the high-temperature section is met, and the high-strength and low-brittleness transition temperature value performance of the low-temperature section is also met.
The sixth specific implementation mode: the embodiment is described with reference to fig. 1 to 5, and provides a 50MW single-cylinder air-cooled photothermal steam turbine, wherein a heat regeneration system of the steam turbine is 6-stage heat regeneration, the heat regeneration system is respectively connected with the bottoms of high, medium and low pressure combined cylinders 3, and the heat regeneration system comprises a 3-stage high-pressure heater, a 1-stage deaerator and a 2-stage low-pressure heater. Other components and connection modes are the same as those of the first embodiment.
In the embodiment, the unit adopts a nozzle-regulated steam inlet mode and has the capability of quickly regulating the load, the high-pressure through flow 9 of the unit is provided with a 1-level regulation level and a 14-level pressure level, and the medium-low pressure through flow 10 of the unit is provided with a 17-level pressure level. The heat regeneration system has 6 levels, namely a 3-level high-pressure heater, a 1-level deaerator and a 2-level low-pressure heater, and the cycle efficiency of the unit is greatly improved through multi-level heat regeneration.
The seventh embodiment: the embodiment is described with reference to fig. 1 to 5, and provides a 50MW single-cylinder air-cooled photothermal turbine, wherein the front bearing box 1 and the rear bearing box 2 are both arranged on the ground. Other components and connection modes are the same as those of the first embodiment.
The rear bearing box 2 is arranged on the ground, so that the clearance between a low-pressure end steam seal arranged on the rear bearing box and the rotor is not influenced by the deformation and the temperature of the low-pressure cylinder.
The specific implementation mode is eight: the embodiment is described with reference to fig. 1 to 5, and provides a 50MW single-cylinder air-cooled photothermal steam turbine, wherein the front bearing box 1 is supported on the base frame by adopting a floor structure, the adjusting end of the high, medium and low pressure combined cylinder 3 is supported on the front bearing box 1 by a lower cat claw, and the cat claw is in sliding fit with the front bearing box 1. The other components and the connection mode are the same as those of the seventh embodiment.
The specific implementation method nine: the embodiment is described with reference to fig. 1 to 5, and provides a 50MW single-cylinder air-cooled photothermal turbine, wherein a thrust bearing of the front bearing box 1 is provided with a relative expansion dead point of the rotor assembly 4, the rear end of the high, medium and low pressure combined cylinder 3 falls on the base frame, and the rear end of the high, medium and low pressure combined cylinder 3 is provided with an expansion absolute dead point. Other components and connection modes are the same as those of the first embodiment.
The front bearing box bears the thrust bearing of the rotor, which is the relative dead point of the rotor, and the absolute dead point of the unit is designed at the low-pressure exhaust cylinder and is the expansion absolute dead point of the whole unit. The relative expansion dead point of the turbine rotor is designed at the thrust bearing of the front bearing box. During operation, the high-medium and low-pressure cylinders expand towards the adjusting ends, the cylinders push the front bearing box to slide through the centering beam, and the turbine rotor expands towards the two ends by taking the thrust bearing as the center.
The detailed implementation mode is ten: the embodiment is described with reference to fig. 1 to 5, and provides a 50MW single-cylinder air-cooled photothermal steam turbine, wherein the high-medium-low pressure cylinder 3 has a double-cylinder structure. Other components and connection modes are the same as those of the first embodiment.
The double-layer cylinder structure is suitable for the characteristics of the high-temperature working environment of the unit, and ensures that the cylinder body has good strength, good rigidity and small thermal stress.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (10)
1. The utility model provides a 50MW single cylinder air cooling light and heat steam turbine which characterized in that: the high-pressure, medium-pressure and low-pressure combined steam turbine comprises a front bearing box (1), a rear bearing box (2), a high-medium and low-pressure combined cylinder (3), a rotor assembly (4), a high-pressure main steam valve (5), a high-pressure regulating valve (6), a medium-pressure main steam valve (7) and a medium-pressure regulating valve (8), wherein the front bearing box (1) is arranged close to the high-pressure side of the high-medium and low-pressure combined cylinder (3), the rear bearing box (2) is arranged close to the low-pressure side of the high-medium and low-pressure combined cylinder (3), the rotor assembly (4) is sequentially arranged in the front bearing box (1), the high-medium and low-pressure combined cylinder (3) and the rear bearing box (2), the high-pressure main steam valve (5) and the medium-pressure main steam valve (7) are respectively arranged at two sides of the high-medium and low-pressure combined cylinder (3), the steam outlet end of the high-pressure main steam valve (5) is connected with the steam inlet end of the high-pressure regulating valve (6), the steam outlet end of the high-medium-low-pressure regulating valve (6) is connected with the main steam inlet of the high-medium and low-pressure combined cylinder (3), the steam outlet end of the medium-pressure main steam valve (7) is connected with the steam inlet end of the medium-pressure regulating valve (8), the steam outlet end of the medium-pressure regulating valve (8) is communicated with the medium-pressure steam inlet of the high-medium low-pressure combined cylinder (3), and a high-pressure through flow (9) and a medium-low pressure through flow (10) are sequentially arranged between the rotor assembly (4) and the high-medium low-pressure combined cylinder (3) from first to last.
2. The 50MW single-cylinder air-cooled photothermal turbine according to claim 1, wherein: the high-pressure through flow (9) comprises a 1-stage regulating stage and a 14-stage pressure stage, and the medium-low pressure through flow (10) comprises a 17-stage pressure stage.
3. The 50MW single-cylinder air-cooled photothermal turbine according to claim 1, wherein: the high-pressure regulating valve (6) is communicated with the high-medium low-pressure combined cylinder (3) through two high-pressure steam inlet air guide pipes (11), two parts of the top and the bottom of the high-medium low-pressure combined cylinder (3) are respectively provided with a main steam inlet, a high-pressure steam inlet insertion pipe (12) is arranged on the main steam inlet, one high-pressure steam inlet air guide pipe (11) is communicated with the high-pressure steam inlet insertion pipe (12) at the top of the high-medium low-pressure combined cylinder (3), the other high-pressure steam inlet air guide pipe (11) is communicated with the high-pressure steam inlet insertion pipe (12) at the bottom of the high-medium low-pressure combined cylinder (3), the medium-pressure regulating valve (8) is communicated with the high-medium low-medium combined cylinder (3) through two medium-pressure steam inlet air guide pipes (13), the bottom of the high-medium low-medium-pressure combined cylinder (3) is provided with two medium-pressure steam inlet openings, a medium-pressure steam inlet insertion pipe (14) is arranged on the medium-pressure steam inlet opening, and each medium-pressure steam inlet air guide pipe (13) is communicated with one medium-pressure steam inlet insertion pipe (14).
4. The 50MW single-cylinder air-cooled photo-thermal turbine as claimed in claim 3, wherein: the steam outlet end of the high-pressure steam inlet air guide pipe (11) is provided with a plurality of adjusting stage nozzles, and the high-pressure steam inlet air guide pipe (11) is communicated with the high-pressure steam inlet inserting pipe (12) through the plurality of adjusting stage nozzles.
5. The 50MW single-cylinder air-cooled photothermal turbine according to claim 1, wherein: the rotor assembly (4) comprises a high-temperature section rotor and a low-temperature section rotor, and the high-temperature section rotor and the low-temperature section rotor are fixedly connected through bolts.
6. The 50MW single-cylinder air-cooled photothermal turbine according to claim 1, wherein: the heat recovery system of the steam turbine is 6-stage heat recovery, the heat recovery system is respectively connected with the bottoms of the high, medium and low pressure combined cylinders (3), and the heat recovery system comprises a 3-stage high-pressure heater, a 1-stage deaerator and a 2-stage low-pressure heater.
7. The 50MW single-cylinder air-cooled photothermal turbine according to claim 1, wherein: the front bearing box (1) and the rear bearing box (2) are arranged in a floor mode.
8. The 50MW single-cylinder air-cooled photothermal turbine according to claim 7, wherein: the front bearing box (1) is supported on the base frame by adopting a floor structure, the adjusting end of the high-medium-low pressure combined cylinder (3) is supported on the front bearing box (1) through a lower cat claw, and the cat claw is in sliding fit with the front bearing box (1).
9. The 50MW single-cylinder air-cooled photothermal turbine according to claim 8, wherein: the thrust bearing of the front bearing box (1) is provided with a relative expansion dead point of the rotor assembly (4), the rear end of the high, medium and low pressure combined cylinder (3) falls on the base frame, and the rear end of the high, medium and low pressure combined cylinder (3) is provided with an expansion absolute dead point.
10. The 50MW single-cylinder air-cooled photothermal turbine according to claim 1, wherein: the high, medium and low pressing cylinders (3) are of a double-layer cylinder body structure.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023336250.2U CN213899061U (en) | 2020-12-30 | 2020-12-30 | 50MW single-cylinder air cooling photo-thermal steam turbine |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202023336250.2U CN213899061U (en) | 2020-12-30 | 2020-12-30 | 50MW single-cylinder air cooling photo-thermal steam turbine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627916A (en) * | 2020-12-30 | 2021-04-09 | 哈尔滨汽轮机厂有限责任公司 | 50MW single-cylinder air cooling photo-thermal steam turbine |
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- 2020-12-30 CN CN202023336250.2U patent/CN213899061U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112627916A (en) * | 2020-12-30 | 2021-04-09 | 哈尔滨汽轮机厂有限责任公司 | 50MW single-cylinder air cooling photo-thermal steam turbine |
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