阅读说明：本技术 一种100mw单缸空冷光热汽轮机 (100MW single-cylinder air-cooling photo-thermal steam turbine ) 是由 赫广迅 王征 孙杨 徐林峰 彭理想 尉坤 张金春 邢冠一 于 2021-09-23 设计创作，主要内容包括：一种100MW单缸空冷光热汽轮机,它涉及光热发电及汽轮机技术领域。本发明解决了光热领域国内无100MW等级容量光热空冷汽轮机的问题。本发明的N个高压进汽插管一端分别插装在高压缸上的N个高压进汽口内,高压主汽管道一端安装高压主汽阀,高压主汽管道另一端外壁安装N个高压调节阀,N个高压调节阀分别与N个高压进汽插管连接,高压排汽管道一端与高压缸上的高压排汽口连接,高压排汽管道另一端与回热系统进汽口连通,中压主汽管道一端与回热系统出汽口连通,中压主汽管道一端安装有中压主汽阀,中压主汽管道另一端与中压缸上的中压进汽口连接,低压排汽缸下部的低压排汽口与外部凝汽器连接。本发明用于提高缸效率和循环效率。(A100 MW single-cylinder air-cooling photo-thermal turbine relates to the technical field of photo-thermal power generation and turbines. The invention solves the problem that the domestic photothermal air cooling turbine with the capacity of 100MW grade does not exist in the photothermal field. One end of N high-pressure steam inlet insertion pipes is respectively inserted into N high-pressure steam inlets on a high-pressure cylinder, one end of a high-pressure main steam pipeline is provided with a high-pressure main steam valve, the outer wall of the other end of the high-pressure main steam pipeline is provided with N high-pressure regulating valves, the N high-pressure regulating valves are respectively connected with the N high-pressure steam inlet insertion pipes, one end of a high-pressure steam exhaust pipeline is connected with a high-pressure steam outlet on the high-pressure cylinder, the other end of the high-pressure steam exhaust pipeline is communicated with a steam inlet of a regenerative system, one end of a medium-pressure main steam pipeline is communicated with a steam outlet of the regenerative system, one end of the medium-pressure main steam pipeline is provided with a medium-pressure main steam valve, the other end of the medium-pressure main steam pipeline is connected with a medium-pressure steam inlet on a medium-pressure cylinder, and a low-pressure steam outlet at the lower part of a low-pressure steam exhaust cylinder is connected with an external condenser. The invention is used for improving the cylinder efficiency and the cycle efficiency.)

1. The utility model provides a 100MW single cylinder air cooling light and heat steam turbine which characterized in that: the high-pressure, medium-pressure and low-pressure cylinder closing module comprises a cylinder body (301), a turbine high-temperature section rotor (302), a turbine low-temperature section rotor (307), a low-exhaust-end steam seal (303), a high-exhaust-end steam seal (304), a front bearing box (305), a rear bearing box (306), a rotor thrust bearing a and a rotor thrust bearing b, wherein the turbine high-temperature section rotor (302) and the turbine low-temperature section rotor (307) are horizontally arranged, one end of the turbine high-temperature section rotor (302) is rotatably connected with the front bearing box (305) through the rotor thrust bearing a, the front bearing box (305) is arranged in a grounded manner, the other end of the turbine high-temperature section rotor (302) is connected with one end of the turbine low-temperature section rotor (307) through a bolt structure, and the other end of the turbine low-temperature section rotor (307) is rotatably connected with the rear bearing box (306) through the thrust bearing b, the rear bearing box (306) is arranged in a floor mode, the cylinder body (301) is sleeved on the steam turbine rotor (302), the front portion of the cylinder body (301) is provided with an assembling hole a matched with the steam turbine rotor (302), the inner cylindrical surface of the assembling hole a is provided with a high exhaust end steam seal (304), the high exhaust end steam seal (304) is sleeved on the steam turbine cylinder body (301), the rear portion of the cylinder body (301) is provided with an assembling hole b matched with the steam turbine rotor (302), the inner cylindrical surface of the assembling hole b is provided with a low exhaust end steam seal (303), the low exhaust end steam seal (303) is sleeved on the steam turbine cylinder body (301), the high pressure steam guide assembly comprises a high pressure main steam pipeline (11), a high pressure main steam valve (12), N high pressure regulating valves (13), N high pressure steam guide pipes (14) and N high pressure steam inlet insertion pipes (15), N is not less than 1, N is a positive integer, and N high pressure steam inlets (3011) are formed in a high pressure cylinder (403) of the cylinder body (301), one end of each of N high-pressure steam inlet insertion pipes (15) is respectively inserted into N high-pressure steam inlets (3011), a high-pressure main steam valve (12) is installed at one end of a high-pressure main steam pipeline (11), N high-pressure regulating valves (13) are sequentially installed on the outer wall of the other end of the high-pressure main steam pipeline (11) from front to back along the length direction, the rear parts of the N high-pressure regulating valves (13) are respectively connected with the other ends of the N high-pressure steam inlet insertion pipes (15) through N high-pressure steam guide pipes (14), a high-pressure steam outlet (3012) is formed in a high-pressure cylinder (403) of a cylinder body (301), one end of each high-pressure steam exhaust pipeline is connected with the high-pressure steam outlet (3012), the other end of each high-pressure steam exhaust pipeline is communicated with a steam inlet of an external boiler reheating system, a medium-pressure steam guide assembly comprises a medium-pressure main steam pipeline (21), a medium-pressure main steam valve (22), a medium-pressure regulating valve (23) and a medium-pressure steam guide pipe (24), and a medium-pressure steam inlet (3013) is formed in a medium-pressure cylinder (404) of the cylinder body (301), medium pressure main steam pipeline (21) one end and outside boiler backheat system steam outlet intercommunication, medium pressure main steam pipeline (21) are close to boiler backheat system steam outlet one end and install medium pressure main steam valve (22), and medium pressure main steam pipeline (21) other end is connected with medium pressure steam inlet (3013), and low pressure steam exhaust mouth is seted up to low pressure steam exhaust cylinder (405) lower part of cylinder body (301), the low pressure steam exhaust mouth passes through the low pressure steam exhaust pipeline and is connected with outside condenser.

2. The 100MW single-cylinder air-cooled photothermal turbine according to claim 1, wherein: and a plurality of regulating stage nozzles are arranged at the rear parts of each high-pressure regulating valve (13) and the high-pressure steam inlet insertion pipe (15).

3. The 100MW single-cylinder air-cooled photothermal turbine according to claim 2, wherein: the high-middle-low pressure combination cylinder module further comprises a high-pressure steam-discharging balance drum (311), a high-pressure steam-feeding balance drum (312) and a medium-pressure steam-feeding balance drum (313), wherein the high-pressure steam-discharging balance drum (311) is arranged at a high-pressure steam-discharging opening (3012), the high-pressure steam-discharging balance drum (311) is arranged on the inner wall of the cylinder body (301), the high-pressure steam-feeding balance drum (312) is arranged at the high-pressure steam-feeding opening (3011), the medium-pressure steam-feeding balance drum (312) is arranged on the inner wall of the cylinder body (301), the medium-pressure steam-feeding balance drum (313) is arranged at a medium-pressure steam-feeding opening (3013), the medium-pressure steam-feeding balance drum (313) is arranged on the inner wall of the cylinder body (301), and the high-pressure steam-discharging balance drum (311), the high-pressure steam-feeding balance drum (312) and the medium-pressure steam-feeding balance drum (313) are all sleeved on the steam turbine rotor (302).

4. The 100MW single-cylinder air-cooled photothermal turbine according to claim 3, wherein: the high-medium-low pressure fit cylinder module further comprises a high-pressure through-flow pressure stage (321) and a medium-pressure through-flow pressure stage (322), the high-pressure through-flow pressure stage (321) is arranged at a high-pressure through-flow position of the high-pressure cylinder (403), the high-pressure through-flow pressure stage (321) is arranged on the inner wall of the cylinder body (301) and the high-temperature section rotor (302) of the steam turbine, the medium-pressure through-flow pressure stage (322) is arranged at a medium-low pressure through-flow position of the medium-pressure cylinder (404), and the medium-pressure through-flow pressure stage (322) is arranged on the inner wall of the cylinder body (301) and the high-temperature section rotor (302) of the steam turbine.

5. The 100MW single-cylinder air-cooled photothermal turbine according to claim 4, wherein: the high-pressure through-flow pressure stage (321) adopts 12 pressure stages, and the medium-pressure through-flow pressure stage (322) adopts 14 pressure stages.

6. The 100MW single-cylinder air-cooled photothermal turbine according to claim 5, wherein: the high-medium-low pressure cylinder pressing module further comprises an adjusting stage (331), the adjusting stage (331) is arranged at the high-pressure steam inlet (3011), the adjusting stage (331) is installed on the inner wall of the cylinder body (301), and the adjusting stage (331) is sleeved on the steam turbine rotor (302).

7. The 100MW single-cylinder air-cooled photothermal turbine according to claim 6, wherein: the adjusting stage (331) adopts a 1-stage adjusting stage.

8. The 100MW single-cylinder air-cooled photothermal turbine according to claim 7, wherein: the high-pressure cylinder (403) and the medium-pressure cylinder (404) of the cylinder body (301) are both of a double-layer cylinder structure, and the low-pressure exhaust cylinder (405) is of a single-layer cylinder structure.

9. The 100MW single-cylinder air-cooled photothermal turbine according to claim 8, wherein: the high-temperature section rotor (302) and the low-temperature section rotor (307) of the steam turbine are both integrally forged rotors, and the high-temperature section rotor and the low-temperature section rotor are connected through bolts.

Technical Field

The invention relates to the technical field of photo-thermal power generation and steam turbines, in particular to a 100MW single-cylinder air-cooling photo-thermal steam turbine.

Background

Since the popularization and construction of the first photo-thermal demonstration power station in China, the research and development design of the steam turbine matched with photo-thermal power generation in various main engine plants in China is gradually developed, the capacity of the steam turbine matched with the photo-thermal power station is limited to be basically within 50MW by the construction scale and the heat collection form of the early photo-thermal power station, but the most effective mode for improving the system efficiency of the photo-thermal power station is to improve design parameters as far as possible, the unit capacity becomes the maximum restriction for improving parameter design and exerting the advantage of high parameters.

Disclosure of Invention

The invention aims to solve the problem that a domestic photo-thermal air-cooling turbine with the capacity of 100MW grade does not exist in the photo-thermal field, and further provides a 100MW single-cylinder air-cooling photo-thermal turbine.

The technical scheme of the invention is as follows:

a100 MW single-cylinder air-cooled photo-thermal turbine comprises a high-pressure steam guide component, a medium-pressure steam guide component and a high-medium-low-pressure cylinder combination module, wherein the high-medium-low-pressure cylinder combination module comprises a cylinder body 301, a turbine high-temperature section rotor 302, a turbine low-temperature section rotor 307, a low-exhaust-end steam seal 303, a high-exhaust-end steam seal 304, a front bearing box 305, a rear bearing box 306, a rotor thrust bearing a and a rotor thrust bearing b, the turbine high-temperature section rotor 302 and the turbine low-temperature section rotor 307 are horizontally arranged, one end of the turbine high-temperature section rotor 302 is rotatably connected with the front bearing box 305 through the rotor thrust bearing a, the front bearing box 305 is arranged in a ground mode, the other end of the turbine high-temperature section rotor 302 is connected with one end of the turbine low-temperature section rotor 307 through a bolt structure, the other end of the turbine low-temperature section rotor 307 is rotatably connected with the rear bearing box 306 through the thrust bearing b, and the rear bearing box 306 is arranged in a ground mode, the cylinder body 301 is sleeved on the steam turbine rotor 302, the front part of the cylinder body 301 is provided with an assembly hole a matched with the steam turbine rotor 302, the inner cylindrical surface of the assembly hole a is provided with a high exhaust end steam seal 304, the high exhaust end steam seal 304 is sleeved on the steam turbine cylinder body 301, the rear part of the cylinder body 301 is provided with an assembly hole b matched with the steam turbine rotor 302, the inner cylindrical surface of the assembly hole b is provided with a low exhaust end steam seal 303, the low exhaust end steam seal 303 is sleeved on the steam turbine cylinder body 301, the high pressure steam guide assembly comprises a high pressure main steam pipeline 11, a high pressure main steam valve 12, N high pressure regulating valves 13, N high pressure steam guide pipes 14 and N high pressure steam inlet insertion pipes 15, N is more than or equal to 1 and is a positive integer, N is provided with N high pressure steam inlets 3011 on the high pressure cylinder 403 of the cylinder body 301, one ends of the N high pressure steam inlet insertion pipes 15 are respectively inserted into the N high pressure steam inlets 3011, one end of the high pressure main steam pipeline 11 is provided with the high pressure main steam valve 12, the outer wall of the other end of the high-pressure main steam pipeline 11 is sequentially provided with N high-pressure regulating valves 13 from front to back along the length direction, the rear parts of the N high-pressure regulating valves 13 are respectively connected with the other ends of N high-pressure steam inlet insertion pipes 15 through N high-pressure steam guide pipes 14, a high-pressure steam outlet 3012 is arranged on a high-pressure cylinder 403 of the cylinder body 301, one end of the high-pressure steam outlet pipeline is connected with the high-pressure steam outlet 3012, the other end of the high-pressure steam outlet pipeline is communicated with a steam inlet of an external boiler reheating system, the medium-pressure steam guide assembly comprises a medium-pressure main steam pipeline 21, a medium-pressure main steam valve 22, a medium-pressure regulating valve 23 and a medium-pressure steam guide pipe 24, a medium-pressure cylinder 404 of the cylinder body 301 is provided with a medium-pressure steam inlet 3013, one end of the medium-pressure main steam pipeline 21 is communicated with a steam outlet of the external boiler reheating system, one end of the medium-pressure main steam pipeline 21 close to the steam outlet of the boiler reheating system is provided with a medium-pressure main steam valve 22, and the other end of the medium-pressure main steam pipeline 21 is connected with the medium-pressure steam inlet 3013, the lower part of the low-pressure exhaust cylinder 405 of the cylinder body 301 is provided with a low-pressure exhaust port, and the low-pressure exhaust port is connected with an external condenser through a low-pressure exhaust pipeline.

Furthermore, a plurality of adjusting stage nozzles are arranged at the rear part of each high-pressure adjusting valve 13 and each high-pressure steam inlet insertion pipe 15.

Further, the high-medium-low pressure cylinder combination module further comprises a high-pressure steam exhaust balance drum 311, a high-pressure steam inlet balance drum 312 and a medium-pressure steam inlet balance drum 313, the high-pressure steam exhaust balance drum 311 is arranged at a high-pressure steam outlet 3012, the high-pressure steam exhaust balance drum 311 is arranged on the inner wall of the cylinder body 301, the high-pressure steam inlet balance drum 312 is arranged at a high-pressure steam inlet 3011, the high-pressure steam inlet balance drum 312 is arranged on the inner wall of the cylinder body 301, the medium-pressure steam inlet balance drum 313 is arranged at a medium-pressure steam inlet 3013, the medium-pressure steam inlet balance drum 313 is arranged on the inner wall of the cylinder body 301, and the high-pressure steam exhaust balance drum 311, the high-pressure steam inlet balance drum 312 and the medium-pressure steam inlet balance drum 313 are all sleeved on the turbine rotor 302.

Further, the high, medium and low pressure cylinder combination module further comprises a high pressure through-flow pressure stage 321 and a medium pressure through-flow pressure stage 322, the high pressure through-flow pressure stage 321 is arranged at a high pressure through-flow position of the high pressure cylinder 403, the high pressure through-flow pressure stage 321 is arranged on the inner wall of the cylinder body 301 and on the high temperature section rotor 302 of the steam turbine, the medium pressure through-flow pressure stage 322 is arranged at a medium and low pressure through-flow position of the medium pressure cylinder 404, and the medium pressure through-flow pressure stage 322 is arranged on the inner wall of the cylinder body 301 and on the high temperature section rotor 302 of the steam turbine.

Further, high pressure through-flow pressure stage 321 employs a 12 stage pressure stage and intermediate pressure through-flow pressure stage 322 employs a 14 stage pressure stage.

Further, the high-pressure, medium-pressure and low-pressure cylinder closing module further comprises an adjusting stage 331, the adjusting stage 331 is arranged at the high-pressure steam inlet 3011, the adjusting stage 331 is installed on the inner wall of the cylinder block 301, and the adjusting stage 331 is sleeved on the steam turbine rotor 302.

Further, the adjusting stage 331 is a 1-stage adjusting stage.

Further, the high-pressure cylinder 403 and the medium-pressure cylinder 404 of the cylinder block 301 are both of a double-cylinder structure, and the low-pressure exhaust cylinder 405 is of a single-cylinder structure.

Further, the turbine high-temperature section rotor 302 and the turbine low-temperature section rotor 307 are both integrally forged rotors, and the high-temperature section rotor and the low-temperature section rotor are connected by bolts.

Compared with the prior art, the invention has the following effects:

1. the 100MW single-cylinder air-cooling photothermal steam turbine can meet the requirements of 100MW air-cooling photothermal power station equipment, and meanwhile, the steam turbine cylinder is high in efficiency, high in circulation efficiency and low in cost control. Can effectively improve the market competitiveness.

2. The steam inlet parameter of the unit of the 100MW single-cylinder air-cooled photo-thermal steam turbine is 16.7MPa/566 ℃, so that the circulation efficiency is fundamentally improved.

3. The unit of the 100MW single-cylinder air-cooled photo-thermal steam turbine is designed by combining high, medium and low pressure cylinders, the single-cylinder efficiency is high, and the low-pressure exhaust cylinder 405 discharges steam downwards in a single-side mode. 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.

4. The unit of the 100MW single-cylinder air-cooled photo-thermal steam turbine adopts the nozzle to adjust steam inlet, can effectively ensure that the unit can quickly adjust load and steam inlet quantity, simultaneously improves the pressure behind an adjusting stage as much as possible, reduces the acting proportion of the adjusting stage, and further improves the economical efficiency of the unit.

5. The 100MW single-cylinder air-cooled photo-thermal steam turbine adopts the pre-twisted assembly type structure for all the static blades and the movable blades of the high pressure, the middle pressure and the low pressure except the low pressure and the last two stages of clapboards, and compared with the traditional welding clapboards, the assembly type structure has no welding line, thereby avoiding welding deformation and better ensuring through-flow precision.

Drawings

FIG. 1 is a schematic diagram of a longitudinal section of a 100MW single-cylinder air-cooled photothermal turbine of the present invention;

FIG. 2 is a top view of the 100MW single-cylinder air-cooled photothermal turbine of the present invention;

FIG. 3 is a left side view of the 100MW single-cylinder air-cooled photothermal turbine of the present invention with the intermediate pressure steam guiding assembly removed;

FIG. 4 is a left side view of the 100MW single-cylinder air-cooled photothermal turbine of the present invention with the high pressure steam guiding assembly removed;

FIG. 5 is a front view of the 100MW single-cylinder air-cooled photothermal turbine of the present invention;

FIG. 6 is a schematic structural diagram of a sliding pin system of the 100MW single-cylinder air-cooled photo-thermal turbine.

Detailed Description

The first embodiment is as follows: the embodiment is described with reference to fig. 1 to 6, and the 100MW single-cylinder air-cooled photothermal turbine of the embodiment includes a high-pressure steam guide assembly, a medium-pressure steam guide assembly and a high-medium-low pressure cylinder combination module, where the high-medium-low pressure cylinder combination module includes a cylinder body 301, a turbine high-temperature section rotor 302, a turbine low-temperature section rotor 307, a low exhaust end steam seal 303, a high exhaust end steam seal 304, a front bearing box 305, a rear bearing box 306, a rotor thrust bearing a and a rotor thrust bearing b, the turbine high-temperature section rotor 302 and the turbine low-temperature section rotor 307 are horizontally arranged, one end of the turbine high-temperature section rotor 302 is rotatably connected with the front bearing box 305 through the rotor thrust bearing a, the front bearing box 305 is arranged in a floor, the other end of the turbine high-temperature section rotor 302 is connected with one end of the turbine low-temperature section rotor 307 through a bolt structure, the other end of the turbine low-temperature section rotor 307 is rotatably connected with the rear bearing box 306 through the thrust bearing b, the rear bearing box 306 is arranged in a floor manner, the cylinder body 301 is sleeved on the turbine rotor 302, the front part of the cylinder body 301 is provided with an assembling hole a matched with the turbine rotor 302, the inner cylindrical surface of the assembling hole a is provided with a high exhaust end steam seal 304, the high exhaust end steam seal 304 is sleeved on the turbine cylinder body 301, the rear part of the cylinder body 301 is provided with an assembling hole b matched with the turbine rotor 302, the inner cylindrical surface of the assembling hole b is provided with a low exhaust end steam seal 303, the low exhaust end steam seal 303 is sleeved on the turbine cylinder body 301, the high pressure steam guide assembly comprises a high pressure main steam pipeline 11, a high pressure main steam valve 12, N high pressure regulating valves 13, N high pressure steam guide pipes 14 and N high pressure steam inlet insertion pipes 15, N is more than or equal to 1, N is a positive integer, N high pressure steam inlets 3011 are arranged on the high pressure cylinder 403 of the cylinder body 301, one end of the N high pressure steam inlet insertion pipes 15 are respectively inserted into the N high pressure steam inlets 3011, one end of a high-pressure main steam pipeline 11 is provided with a high-pressure main steam valve 12, the outer wall of the other end of the high-pressure main steam pipeline 11 is sequentially provided with N high-pressure regulating valves 13 from front to back along the length direction, the rear parts of the N high-pressure regulating valves 13 are respectively connected with the other ends of N high-pressure steam inlet insertion pipes 15 through N high-pressure steam guide pipes 14, a high-pressure steam outlet 3012 is arranged on a high-pressure cylinder 403 of a cylinder body 301, one end of the high-pressure steam outlet pipeline is connected with the high-pressure steam outlet 3012, the other end of the high-pressure steam outlet pipeline is communicated with a steam inlet of an external boiler reheating system, a medium-pressure steam guide assembly comprises a medium-pressure main steam pipeline 21, a medium-pressure main steam valve 22, a medium-pressure regulating valve 23 and a medium-pressure steam guide pipe 24, a medium-pressure steam inlet 3013 is arranged on a medium-pressure cylinder 404 of the cylinder body 301, one end of the medium-pressure main steam pipeline 21 is communicated with a steam outlet of the external boiler reheating system, and a medium-pressure main steam pipeline 21 is provided with a medium-pressure main steam valve 22 at the end close to the outlet of the boiler reheating system, the other end of the medium-pressure main steam pipeline 21 is connected with a medium-pressure steam inlet 3013, the lower part of the low-pressure exhaust cylinder 405 of the cylinder body 301 is provided with a low-pressure steam outlet, and the low-pressure steam outlet is connected with an external condenser through a low-pressure steam exhaust pipeline.

The heat recovery system of the embodiment has 7 levels, namely a 3-level high-pressure heater, a 1-level deaerator and a 3-level low-pressure heater, and the cycle efficiency of the unit is greatly improved through multi-level heat recovery.

The front bearing box 305 and the rear bearing box 306 of the present embodiment are both arranged on the ground, and it is ensured that the gap between the low exhaust end gland seal 303 and the turbine rotor 302 mounted thereon is not affected by the deformation and temperature of the low pressure exhaust cylinder 405. Front bearing box 305 is supported on the base frame by adopting a floor structure, the adjusting end is supported on front bearing box 305 through a lower cat claw, and the cat claw is in sliding fit with front bearing box 305. The front bearing housing 305 bears the rotor thrust bearing a, which is the relative dead center of the turbine rotor 302. The low pressure exhaust cylinder 405 lands on the pedestal. The middle and low pressure rotor is a monobloc forging rotor and is connected by a flange bolt. The rear bearing housing 306 is arranged to the floor.

The absolute dead point 402 of the unit of the present embodiment is designed at the low pressure exhaust cylinder 405, which is the expansion absolute dead point 402 of the entire unit. The relative expansion dead center of the turbine rotor 302 is designed at the rotor thrust bearing a of the front bearing housing 305. During operation, the high-pressure cylinder, the medium-pressure cylinder and the low-pressure cylinder expand towards the adjusting end, the cylinders push the front bearing box 305 to slide through the centering beam 401, and the steam turbine rotor 302 expands towards two ends by taking the rotor thrust bearing a as a center.

The second embodiment is as follows: referring to fig. 1 to 6, the present embodiment is described, and a plurality of adjusting stage nozzles are provided at the rear of each of the high pressure adjusting valve 13 and the high pressure steam inlet pipe 15. So set up, adopt the admission mode that the nozzle was adjusted, possess the ability of quick adjustment load. The number of the adjusting stage nozzles corresponding to a certain number behind each high-pressure adjusting valve 13 is controlled, and the flow of the main steam entering the high-pressure cylinder 403 is controlled through the opening number and the opening degree of the high-pressure adjusting valves 13. Other components and connections are the same as in the first embodiment.

The third concrete implementation mode: the embodiment is described with reference to fig. 1 to 6, the high-medium-low pressure cylinder combination module of the embodiment further includes a high-pressure steam-discharging balance drum 311, a high-pressure steam-feeding balance drum 312 and a medium-pressure steam-feeding balance drum 313, the high-pressure steam-discharging balance drum 311 is disposed at the high-pressure steam-discharging port 3012, the high-pressure steam-discharging balance drum 311 is mounted on the inner wall of the cylinder 301, the high-pressure steam-feeding balance drum 312 is disposed at the high-pressure steam-feeding port 3011, the high-pressure steam-feeding balance drum 312 is mounted on the inner wall of the cylinder 301, the medium-pressure steam-feeding balance drum 313 is disposed at the medium-pressure steam-feeding port 3013, the medium-pressure steam-feeding balance drum 313 is mounted on the inner wall of the cylinder 301, and the high-pressure steam-discharging balance drum 311, the high-pressure steam-feeding balance drum 312 and the medium-pressure steam-feeding balance drum 313 are all sleeved on the steam turbine rotor 302. Other compositions and connections are the same as in the first or second embodiments.

The fourth concrete implementation mode: the embodiment is described with reference to fig. 1 to fig. 6, the high-pressure, medium-pressure and low-pressure cylinder combination module of the embodiment further includes a high-pressure through-flow pressure stage 321 and a medium-pressure through-flow pressure stage 322, the high-pressure through-flow pressure stage 321 is disposed at the high-pressure through-flow position of the high-pressure cylinder 403, the high-pressure through-flow pressure stage 321 is mounted on the inner wall of the cylinder body 301 and on the high-temperature turbine rotor 302, the medium-pressure through-flow pressure stage 322 is disposed at the medium-pressure and low-pressure through-flow position of the medium-pressure cylinder 404, and the medium-pressure through-flow pressure stage 322 is mounted on the inner wall of the cylinder body 301 and on the high-temperature turbine rotor 302, and other components and connection relationships are the same as those of the first, second or third specific embodiments.

The fifth concrete implementation mode: referring to fig. 1 to 6, the present embodiment will be described, in which a high-pressure through-flow pressure stage 321 employs a 12-stage pressure stage and an intermediate-pressure through-flow pressure stage 322 employs a 14-stage pressure stage. According to the arrangement, the high-pressure through flow of the unit is provided with 12 pressure levels, and the medium-low pressure through flow is provided with 14 pressure levels. Other compositions and connection relationships are the same as those in the first, second, third or fourth embodiment.

The sixth specific implementation mode: the embodiment is described with reference to fig. 1 to fig. 6, the high-pressure, medium-pressure and low-pressure cylinder closing module of the embodiment further includes an adjusting stage 331, the adjusting stage 331 is disposed at the high-pressure steam inlet 3011, the adjusting stage 331 is installed on the inner wall of the cylinder block 301, and the adjusting stage 331 is sleeved on the steam turbine rotor 302. Other compositions and connection relationships are the same as in the first, second, third, fourth or fifth embodiment.

The seventh embodiment: the present embodiment will be described with reference to fig. 1 to 6, and the adjustment stage 331 of the present embodiment is a 1-stage adjustment stage. So set up, unit high pressure through-flow sets up 1 level regulation level. Other compositions and connection relationships are the same as in the first, second, third, fourth, fifth or sixth embodiment.

The specific implementation mode is eight: in the present embodiment, the high-pressure cylinder 403 and the intermediate cylinder 404 of the cylinder block 301 of the present embodiment are both of a double-cylinder structure, and the low-pressure exhaust cylinder 405 is of a single-cylinder structure, as described with reference to fig. 1 to 6. The device 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. Other compositions and connection relationships are the same as those of embodiment one, two, three, four, five, six or seven.

The specific implementation method nine: in the present embodiment, the high-pressure cylinder 403 and the intermediate cylinder 404 of the cylinder block 301 of the present embodiment are both of a double-cylinder structure, and the low-pressure exhaust cylinder 405 is of a single-cylinder structure, as will be described with reference to fig. 1 to 6. Other compositions and connection relationships are the same as those in the first, second, third, fourth, fifth, sixth, seventh or eighth embodiment.

The detailed implementation mode is ten: in the present embodiment, the turbine high-temperature stage rotor 302 and the turbine low-temperature stage rotor 307 of the present embodiment are both integrally forged rotors, and the high-temperature stage rotor and the low-temperature stage rotor are connected by bolts, as described with reference to fig. 1 to 6. Other compositions and connections are the same as those of the first, second, third, fourth, fifth, sixth, seventh, eighth or ninth embodiments.

Principle of operation

The working principle of the 100MW single-cylinder air-cooling photothermal steam turbine of the invention is described with reference to FIGS. 1 to 6: the 100MW single-cylinder air-cooled photo-thermal steam turbine unit adopts a steam guide pipe design, steam enters the high-pressure cylinder 403 after passing through the high-pressure main steam valve 12 and the high-pressure regulating valve 13, and flows out of a high-pressure steam exhaust pipeline at the lower part of the high-pressure outer cylinder after flowing through a high-pressure through-flow; the steam reheated by the boiler enters the intermediate pressure main steam valve 22 and the intermediate pressure regulating valve 23, then enters the intermediate pressure cylinder 404, flows through the intermediate and low pressure through-flow, and then enters the condenser through the low pressure steam exhaust port at the lower part of the low pressure steam exhaust cylinder 405.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.