CN218563712U - 60MW reaction type intermediate air inlet once reheat air turbine - Google Patents

Abstract

A60 MW reaction type intermediate air inlet single reheat air turbine belongs to the technical field of air turbines. The utility model discloses a both sides at high and medium pressure outer casing are installed to fore bearing case, rear bearing case, high and medium pressure outer casing, fore bearing case and rear bearing case, install the high-pressure inner casing in the high and medium pressure outer casing, be equipped with high and medium pressure whole in the high and medium pressure outer casing and forge the rotor, high and medium pressure whole forges the rotor and sets up in the high-pressure inner casing simultaneously, and high and medium pressure whole forges the front end and the front bearing case cooperation installation of rotor, high and medium pressure whole rear end and the rear bearing case cooperation installation of forging the rotor. The unit adopts compressed air as a working medium, two stages of turbines are used in total to form a high-medium pressure cylinder, a high-pressure part is of an inner-cylinder structure and an outer-cylinder structure, and a medium-pressure part is of a single-cylinder structure. The cylinder passes through cat claw and centering beam structural connection with the front bearing case, and this connected mode is ripe stable, can satisfy unit inflation demand well.

Description

60MW reaction type intermediate air inlet single reheat air turbine

Technical Field

The utility model relates to a reaction type intermediate air inlet single reheat air turbine belongs to air turbine technical field.

Background

Compressed air energy storage is a novel energy storage technology, and refers to an energy storage mode that electric energy is used for compressing air in a low-ebb period of power grid load, and compressed air is released to push air turbine to generate electricity in a high-peak period of power grid load.

The air turbine is an important device of a compressed air energy storage system, is a core power component of compressed air energy storage, and directly determines the investment cost and the economical efficiency of a power station due to the structural form and the efficiency of the air turbine.

Existing air turbines are also known as "reheat air turbines", for example, as disclosed in the publication nos.: CN217270341U is a 10MW triple reheat reaction type air turbine which can realize triple reheat because it adopts a 4-stage turbine structure, and the cylinders of the turbine are arranged in sequence along the axial direction thereof, and the structure design has the following disadvantages:

(1) The cylinder of the turbine is arranged along the axial direction, so that the size of the air turbine is lengthened/enlarged, and the requirement on an installation site is too high due to the lengthened/enlarged size of the air turbine;

(2) Because the structure of the 4-section turbine is adopted, the inner rotor of the turbine can meet the use requirement of the 4-section turbine only by arranging a longer structure, and when the rotor is longer, the bearing is overloaded, so that not only can the radial supporting surface be burnt, but also the axial direct-thrust bearing can be burnt;

(3) In addition, because the turbine cylinder adopts an axially-arranged structure, the primary reheating work doing, the secondary reheating work doing and the tertiary reheating work doing all act on the whole turbine, and the difference of work doing of each time of the unit is different, so that the relative expansion difference is generated, and the operation safety of the unit is reduced.

Based on the above statement, the existing air turbine equipment cannot meet the requirement of further commercialization of the compressed air energy storage system, and an air turbine equipment with reasonable structural design, high stage efficiency and high cycle efficiency is urgently needed to be developed to meet the operation requirement of the compressed air energy storage system.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve above-mentioned technical problem. A brief summary of the present invention is provided below in order to provide a basic understanding of some aspects of the present invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical elements of the invention or to delineate the scope of the invention.

The utility model discloses a solve the technical scheme that above-mentioned technical problem that provides adopted and be:

the utility model provides a 60MW reaction type middle intake once reheat air turbine, includes that front bearing case, rear bearing case, high-and-medium pressure outer cylinder, front bearing case and rear bearing case install the both sides at high-and-medium pressure outer cylinder, install high-pressure inner cylinder in the high-and-medium pressure outer cylinder, be equipped with high-and-medium pressure whole forged rotor in the high-and-medium pressure outer cylinder, high-and-medium pressure whole forged rotor sets up in high-pressure inner cylinder simultaneously, and high-and-medium pressure whole forged rotor's front end and front bearing case cooperation installation, high-and-medium pressure whole forged rotor's rear end and rear bearing case cooperation installation.

Preferably: the exhaust guide box is further included, the rear bearing box is arranged inside the exhaust guide box, the front end of the high-medium pressure outer cylinder is provided with a cat claw, the front end of the high-medium pressure outer cylinder is installed in a matched mode with the front bearing box through the cat claw, and the rear end of the high-medium pressure outer cylinder is installed on the exhaust guide box in a flange mode.

Preferably, the following components: the front end of the high-middle pressure outer cylinder is also connected with the front bearing box through a centering beam structure.

Preferably: the high-medium pressure outer cylinder comprises an upper cylinder body and a lower cylinder body, a main air inlet is formed in the upper cylinder body, and a main air outlet and a primary reheating air inlet are formed in the lower cylinder body.

Preferably, the following components: the main air inlet is tangentially arranged on the high-medium pressure outer cylinder; and a main air adjusting combined valve is directly connected to the main air inlet.

Preferably, the following components: and a front end shaft air seal is arranged between the front end of the high and medium pressure outer cylinder and the high and medium pressure whole forging rotor.

Preferably: the inner wall of the high and medium pressure outer cylinder is provided with a plurality of stages of first stationary blades through partition plate sleeves, and the high and medium pressure forging rotor is provided with a plurality of stages of first moving blades matched with the plurality of stages of first stationary blades;

and the inner wall of the high-pressure inner cylinder is provided with a plurality of stages of second stationary blades, and the high-middle-pressure integrally-forged rotor is provided with a plurality of stages of second moving blades matched with the plurality of stages of second stationary blades.

Preferably: the exhaust guide box is provided with an air inlet opening and an exhaust opening, an exhaust guide cover arranged in a horn shape is arranged in the exhaust guide box, and a steady flow guide plate is arranged in an inlet of the exhaust guide cover.

Preferably, the following components: the rear bearing box comprises an outer box body and an inner bearing box, the inner bearing box is installed in the outer box body, the outer box body and the inner bearing box form an interlayer structure, and the rear end of the high and medium-pressure whole forging rotor penetrates through the outer box body and then is installed in the inner bearing box through a support bearing. The "support bearings" are capable of bearing the full weight of the high and medium swaged rotor and the centrifugal forces due to rotor mass imbalance, determining the correct radial position of the rotor in the cylinder block, and include, but are not limited to, cylindrical shoe support bearings, elliptical shoe support bearings, triple oil wedge support bearings, tiltable shoe support bearings, and the like.

A60 MW reaction type intermediate air inlet single reheat air turbine operation method is realized based on a 60MW reaction type intermediate air inlet single reheat air turbine, and comprises the following steps:

step 1, compressed air enters a high-pressure inner cylinder through a main air regulation combined valve in a tangential air inlet mode;

step 2, performing through-flow work inside the high-pressure inner cylinder, specifically: when compressed air flows through the multistage second stationary blades, airflow is accelerated, the accelerated airflow is sprayed to the multistage second moving blades, and circumferential component force is generated on the multistage second moving blades, so that the high and medium pressure whole forging rotor is pushed to continuously rotate, and the high and medium pressure whole forging rotor performs mechanical work on the outside in high-speed rotation;

step 3, the compressed air after through-flow work enters the high-medium pressure outer cylinder and is discharged from a main exhaust port at the electric end of the high-medium pressure outer cylinder;

step 4, after the compressed air exhausted from the main exhaust port is pressurized and heated for the second time, the compressed air enters the high-medium pressure outer cylinder again through the primary reheating air inlet;

and 5, performing medium-pressure through-flow work in the high-medium-pressure outer cylinder, specifically: when compressed air flows through the multistage first stationary blades, airflow is accelerated, the accelerated airflow is sprayed onto the multistage first movable blades, and circumferential component force is generated on the multistage first movable blades, so that the high and medium pressure forging rotor is pushed to continuously rotate, and the high and medium pressure forging rotor does mechanical work to the outside in high-speed rotation;

and 6, after the medium-pressure through-flow work, the compressed air enters the exhaust guide box along the axial direction of the high-medium-pressure whole forging rotor and is finally exhausted by the exhaust device.

The utility model discloses beneficial effect lies in:

1. the through flow of the unit of the utility model adopts a multi-stage small enthalpy drop reaction type design concept, and compared with the existing impulse type design technology, the single-stage efficiency of the blade can be effectively improved, and the flow efficiency is fundamentally improved;

2. the utility model discloses all quiet leaf, movable vane adopt the pre-twist fabricated construction among the air turbine unit, compare with traditional welding baffle, and the fabricated construction does not have the welding seam, avoids welding deformation, has guaranteed the through-flow precision better;

3. the valve in the air turbine unit is directly connected with the cylinder, so that an air guide pipe structure is omitted, the cylinder is used for tangential air intake, and the air intake loss is reduced to the maximum extent;

4. the utility model adopts high-performance shaft end sealing technology to control the leakage of the shaft end of the compressed air turbine;

5. the utility model discloses air turbine unit well cylinder is connected with the bearing box and is adopted cat claw and fixed beam structure, and the structure is ripe stable, can satisfy the expansion requirement of unit well.

Drawings

FIG. 1 is a sectional view of a 60MW reaction intermediate intake single reheat air turbine;

FIG. 2 is a perspective view of the fitting structure of the high and medium pressure outer cylinder and the exhaust guide box;

FIG. 3 is a top view of the primary air register valve installed in cooperation with the primary air intake of the high and medium pressure outer cylinder;

FIG. 4 is a cross-sectional view of the exhaust guide box;

FIG. 5 is a schematic view of arrangement and installation of a plurality of stages of second stationary blades and a plurality of stages of second moving blades inside a high-pressure inner cylinder;

FIG. 6 is an enlarged view at A in FIG. 1;

FIG. 7 is a schematic view of the arrangement and installation of the high pressure inner cylinder in the high and medium pressure outer cylinder;

FIG. 8 is a schematic compressed air flow diagram for a 60MW reaction intermediate intake single reheat air turbine;

FIG. 9 is a schematic view of a centering beam configuration;

FIG. 10 is a diagram of an air turbine sliding pin system;

FIG. 11 is a schematic view of a reaction blade;

in the figure, 1-a front bearing box, 2-a rear bearing box, 3-a high-medium pressure outer cylinder, 4-a high-pressure inner cylinder, 5-a high-medium pressure forged rotor, 6-a cat claw, 7-an exhaust guide box, 8-a centering beam structure, 9-an upper cylinder body, 10-a lower cylinder body, 11-a main air inlet, 12-a main air outlet, 13-a single reheating air inlet, 14-a main air regulating combination valve, 15-a front end shaft air seal, 16-a partition sleeve, 17-a multistage first stationary blade, 18-a multistage first moving blade, 19-a multistage second stationary blade, 20-a multistage second moving blade, 21-an air inlet opening, 22-an exhaust opening, 23-an exhaust guide cover, 24-a steady flow guide plate, 25-an outer layer box body, 26-an inner layer bearing box and 27-a turning gear.

Detailed Description

The present invention will be further explained with reference to specific examples, which are to be understood as illustrative only and not as limiting the scope of the invention, and modifications to the various equivalent forms of the invention, which may occur to those skilled in the art upon reading the present invention, fall within the scope of the appended claims.

In order to make the present embodiment fully and clearly disclosed, the following electric terminal and the adjusting terminal are explained in the detailed embodiment, wherein the electric terminal and the adjusting terminal are used for indicating the direction, the generator side is the electric terminal, and the air turbine side is the rotor of the adjusting terminal, and is used for bearing the revolving force of the compressed air to all the working blades and driving the generator rotor, the main oil pump and the speed adjuster to rotate.

The first embodiment is as follows:

the embodiment is described by combining with accompanying drawings 1-11 of the specification, and discloses a 60MW reaction type intermediate air inlet once-reheat air turbine, which comprises a front bearing box 1, a rear bearing box 2, a high and medium pressure outer cylinder 3, a front bearing box 1 and a rear bearing box 2 which are arranged on two sides of the high and medium pressure outer cylinder 3, wherein a high and medium pressure inner cylinder 4 is arranged in the high and medium pressure outer cylinder 3, a high and medium pressure integral forging rotor 5 is arranged in the high and medium pressure outer cylinder 3, the high and medium pressure integral forging rotor 5 is simultaneously arranged in the high and medium pressure inner cylinder 4, the front end of the high and medium pressure integral forging rotor 5 is installed with the front bearing box 1 in a matching manner, and the rear end of the high and medium pressure integral forging rotor 5 is installed with the rear bearing box 2 in a matching manner.

Further, an exhaust guide box 7 is also included, and the rear bearing box 2 is arranged and installed inside the exhaust guide box 7.

Further, the high-medium pressure outer cylinder 3 comprises an upper cylinder body 9 and a lower cylinder body 10, a main air inlet 11 is arranged on the upper cylinder body 9, and a main air outlet 12 and a single reheating air inlet 13 are arranged on the lower cylinder body 10.

Further, the primary air intake 11 is arranged tangentially on the high-and medium-pressure outer cylinder 3; and a main air regulating combined valve 14 is directly installed at the main air inlet 11.

Further, a front end shaft air seal 15 is arranged between the front end of the high and medium pressure outer cylinder 3 and the high and medium pressure integral forging rotor 5.

Furthermore, a plurality of stages of first stationary blades 17 are mounted on the inner wall of the high-medium pressure outer cylinder 3 through a partition sleeve 16, and a plurality of stages of first moving blades 18 matched with the plurality of stages of first stationary blades 17 are mounted on the high-medium pressure swaged rotor 5; a plurality of stages of second stationary blades 19 are mounted on the inner wall of the high-pressure inner cylinder 4, and a plurality of stages of second moving blades 20 adapted to the plurality of stages of second stationary blades 19 are mounted on the high-and medium-pressure swaged rotor 5. In the embodiment, all the static blades and the movable blades adopt the pre-twisted assembly type structure, the assembly type structure has no welding line, the welding deformation is avoided, and the through-flow precision is better ensured.

Further, the turning gear 27 is installed on the front bearing box 1, the turning gear 27 is installed in a meshed mode with the high and medium pressure whole forging rotor 5, the turning gear can effectively prevent the high and medium pressure whole forging rotor 5 from being bent in a hot mode, and the turning gear 27 can enable the high and medium pressure whole forging rotor 5 to rotate at a certain rotating speed before starting or stopping of the air turbine, so that the rotor can be cooled or heated uniformly, thermal stress and thermal bending of the rotor caused by uneven temperature are reduced, and meanwhile before the rotor is turned in a rushing mode, the turning gear 27 can also check whether the unit has normal working conditions.

The operating principle of a 60MW reaction type intermediate air inlet single reheat air turbine is as follows: firstly, compressed air enters the high-pressure inner cylinder 4 through the main air regulation combined valve 14 in a tangential air inlet mode, and through-flow work is performed inside the high-pressure inner cylinder 4; secondly, the compressed air after the through-flow work enters the high and medium pressure outer cylinder 3 and is discharged from a main exhaust port 12 at the electric end of the high and medium pressure outer cylinder 3; thirdly, after the compressed air exhausted from the main exhaust port 12 is pressurized and heated for the second time, the compressed air enters the high-medium pressure outer cylinder 3 again through the primary reheating air inlet 13, and medium-pressure through-flow work is performed in the high-medium pressure outer cylinder 3; finally, after work is done by the medium-pressure through-flow, the compressed air enters the exhaust guide box 7 along the axial direction of the high and medium-pressure whole forging rotor 5, and is finally exhausted by an exhaust device (not shown in the figure) on the right side of the exhaust guide box 7.

A60 MW reaction type intermediate air inlet single reheat air turbine has the following differences and advantages compared with the prior air turbine:

(1) In the air turbine of the present embodiment, the main air inlet 11 adopts a tangential air inlet structure, which reduces the air inlet loss to the maximum extent and is mainly embodied as: good pre-rotational flow of the tangential compressed air can be realized in the high-pressure inner cylinder 4, the pneumatic parameters and the flow field form have 180-degree symmetry, the total pressure loss coefficient of the compressed air is small, and in addition, when the tangential air enters, the outlet airflow angles of the multistage second stationary blades 19 are distributed more uniformly along the circumferential direction in the high-pressure inner cylinder 4. In addition, a main air adjusting combined valve 14 is directly connected to the main air inlet 11, so that an air duct structure is omitted, and air inlet loss is reduced to a greater extent.

(2) Air turbine in this embodiment adopts double-deck jar structure (arrange high-pressure inner casing 4 in the outer jar 3 of high intermediate pressure), the wall thickness of outer jar in the rational design, compressed air at first gets into doing work in the high-pressure inner casing 4 of air turbine, high temperature high-pressure air is restricted in high-pressure inner casing 4 promptly, and the compressed air temperature that the outer jar 3 of high intermediate pressure held is relatively lower, adopt this kind of cylinder body structural design, the rational district's temperature region that distinguishes, reduce the temperature difference when the variable working condition moves, just also reduced thermal stress, improve the life of unit internal portion cover, the speed of quick start-stop has been accelerated. (when starting and stopping, the cooling and heating of the cylinder can be accelerated, the temperature difference stress of the cylinder caused by the increase of the wall thickness of the cylinder is reduced, and the starting time is shortened).

(3) In the air turbine in the embodiment, after the final work is done, the air cylinder adopts axial exhaust, and the exhaust device is arranged behind the exhaust guide box 7, so that the plant space of the air turbine can be reduced, the height of an operation layer is reduced, and a large amount of cost is saved. In addition, axial exhaust, the front end of the high and medium pressure outer cylinder 3 is provided with a cat claw 6 and a centering beam structure 8 for supporting, and the axial expansion thrust of the steam turbine can be absorbed.

(4) In the embodiment, the through flow of the air turbine set is divided into two stages of turbines, compressed air enters the high-pressure inner cylinder 4 through the main air regulation combined valve 14, enters the high-medium pressure outer cylinder 3 after through-flow work, is discharged from the main exhaust port 12 at the electric end of the outer cylinder, reenters the high-medium pressure outer cylinder 3 through the air inlet of the once reheating turbine, and is finally discharged from the exhaust device at the regulation end after medium-pressure through-flow work.

The second embodiment is as follows:

the embodiment is described with reference to the accompanying drawings 1-11 of the specification, and discloses a 60MW reaction type intermediate intake single reheat air turbine, wherein the front end of the high and medium pressure outer cylinder 3 is provided with a cat claw 6, the front end of the high and medium pressure outer cylinder 3 is installed in a matching manner with a front bearing box 1 through the cat claw 6, and the rear end of the high and medium pressure outer cylinder 3 is installed on an exhaust guide box 7 in a flange manner. The front end of the high and medium pressure outer cylinder 3 is also connected with the front bearing housing 1 by a centering beam structure 8. The centering beam structure 8 comprises an I-beam and a plurality of bolts, one end of the I-beam is connected with the front end of the high-medium pressure outer cylinder 3 through the bolts, the other end of the I-beam is connected with the front bearing box 1, and the front bearing box is fixed with the foundation through foundation bolts and is an expansion absolute dead point of the whole unit. So set up, different with current air turbine, high-and-medium pressure outer cylinder 3 is connected with front bearing box 1 and adopts cat claw 6 and centering beam structure 8, its structure is mature stable, during the operation, the unit is expanded to transferring the end by front bearing box 1, through cat claw 6 and centering beam structure 8, transmit the inflation for the cylinder, this kind of arrangement form can realize the unit in starting, various operating condition such as shut down, synchronous axial displacement between front bearing box 1 and high-and-medium pressure outer cylinder 3, and simultaneously, relative dead point and absolute dead point all set up in front bearing box 1 department, the relative difference of expanding of reduction unit that can furthest, improve unit security, can satisfy the expansion requirement of unit well.

The third concrete implementation mode:

the embodiment is described with reference to fig. 1 to fig. 11 in the specification, and discloses a 60MW reaction type intermediate intake primary reheat air turbine, an intake opening 21 and an exhaust opening 22 are arranged on the exhaust guide box 7, an exhaust guide cover 23 arranged in a horn shape is arranged in the exhaust guide box 7, and a steady flow guide plate 24 is installed in an inlet of the exhaust guide cover 23. So arranged, the exhaust guide box 7 is used for guiding the axial flow exhaust, wherein the rear bearing box 2 is arranged in the exhaust guide box 7, and the whole length of the air turbine can be shortened. The compressed air after acting is discharged from the exhaust guide cover 23 arranged in a horn shape in the exhaust guide box 7, so that the exhaust efficiency is improved, and in addition, the steady flow guide plate 24 at the inlet of the exhaust guide cover 23 can reduce the fluctuation of the exhaust gas at the inlet of the exhaust guide box 7 after the through-flow acting of the high and medium pressure outer cylinder 3, so that the flowing uniformity and the outward flowing efficiency of the gas are improved. In addition, the steady flow guide plate 24 is arranged above the inlet of the exhaust guide cover 23, when the exhaust pressure in the upper part of the exhaust guide box is large, a downward pressing force is generated, so that the high-speed stability of the unit exhaust can be enhanced, and the safety performance of the unit is indirectly improved due to the enhanced stability of the unit.

The fourth concrete implementation mode:

the embodiment is described with reference to fig. 1-11 in the specification, and discloses a 60MW reaction type intermediate intake once reheat air turbine, wherein the rear bearing box 2 comprises an outer box 25 and an inner bearing box 26, the inner bearing box 26 is installed in the outer box 25, the outer box 25 and the inner bearing box 26 form a sandwich structure, and the rear end of the high and medium pressure forging rotor 5 passes through the outer box 25 and then is installed in the inner bearing box 26 through a "support bearing". The "support bearings" are capable of bearing the full weight of the high and medium swaged rotor 5 and the centrifugal forces due to rotor mass imbalance, determining the correct radial position of the rotor in the cylinder block, and include, but are not limited to, cylindrical shoe support bearings, elliptical shoe support bearings, triple oil wedge support bearings, tiltable shoe support bearings, and the like. So set up, rear bearing case 2 adopts sandwich structure, prevents that exhaust temperature is too high, causes the influence to lubricating oil, and when lubricating oil operating temperature was high, rear bearing case 2 inner support bearing cooling effect reduced to reduce the bearing capacity of bearing, finally lead to high middling pressure monobloc forging rotor 5 operation trouble.

The fifth concrete implementation mode:

the embodiment is described with reference to fig. 1 to fig. 11 in the specification, and the embodiment discloses an operation method of a 60MW reaction type intermediate intake air single reheat air turbine, which is implemented based on a 60MW reaction type intermediate intake air single reheat air turbine provided in the first to fifth embodiments, and includes the following steps:

step 1, compressed air enters a high-pressure inner cylinder 4 through a main air regulation combined valve 14 in a tangential air inlet mode;

step 2, performing through-flow work inside the high-pressure inner cylinder 4, specifically: when the compressed air flows through the multistage second stationary blades 19, the air flow is accelerated (the multistage second stationary blades 19 function as nozzles to spray the compressed air toward the multistage second moving blades 20 in an optimal direction), the accelerated air flow is sprayed toward the multistage second moving blades 20, and a circumferential component force is generated on the multistage second moving blades 20, so that the high and medium swaged rotor 5 is pushed to continuously rotate, and the high and medium swaged rotor 5 performs mechanical work to the outside during high-speed rotation; in the high-pressure inner cylinder 4, the number of blade stages is 15, the number of blade stages is large, enthalpy drop is small, and reheat efficiency is high, so that the overall efficiency of the unit is fundamentally improved.

Step 3, the compressed air after through-flow work enters the high-medium pressure outer cylinder 3 and is discharged from a main exhaust port 12 at the electric end of the high-medium pressure outer cylinder 3;

step 4, after the compressed air exhausted from the main exhaust port 12 is pressurized and heated for the second time, the compressed air enters the high-medium pressure outer cylinder 3 again through the primary reheating air inlet 13;

and 5, performing medium-pressure through-flow work in the high-medium-pressure outer cylinder 3, specifically: when the compressed air flows through the multistage first stationary blades 17, the airflow is accelerated, and the accelerated airflow is sprayed onto the multistage first moving blades 18 to generate a circumferential component force on the multistage first moving blades 18, so that the high and medium-pressure swaged rotor 5 is pushed to continuously rotate, and the high and medium-pressure swaged rotor 5 performs mechanical work on the outside in high-speed rotation; in the high-medium pressure outer cylinder 3, the number of blade stages is 8;

and 6, after the intermediate pressure through flow does work, the compressed air enters an exhaust guide box 7 along the axial direction of the high-intermediate pressure whole forging rotor 5 and is finally exhausted by an exhaust device.

The high-medium pressure cylinder is formed by taking compressed air as a working medium and combining two stages of turbines, wherein the high-pressure part is of an inner cylinder structure and an outer cylinder structure, and the medium-pressure part is of a single-layer cylinder structure. The cylinder is connected with the front bearing box through the cat's claw and the centering beam structure, and the connection mode is mature and stable, so that the expansion requirement of the unit can be well met; the rear bearing box is located inside the air cylinder adjusting end, and meanwhile, the air cylinder adjusting end is provided with an exhaust device. And a main air regulation combined valve is arranged on the left side of the air cylinder and is directly connected with the air cylinder through a vertical flange. And the power of the unit is improved to 60MW by adjusting parameters and structures.

The long-term operation air inlet parameter of the 60MW reaction type intermediate air inlet single reheat air turbine is 11.87MPa/320 ℃, the flow is 426.3t/h, and the shaft power of the unit is 61.72MW.

The embodiments of the present invention have been described with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the scope of the present invention, and these forms are all within the protection scope of the present invention.

Claims (9)

1. The utility model provides a 60MW reaction type intermediate air inlet once reheat air turbine, includes front bearing case (1), rear bearing case (2) and high-and-medium-pressure outer cylinder (3), and the both sides in high-and-medium-pressure outer cylinder (3) are installed in front bearing case (1) and rear bearing case (2), its characterized in that: the high-medium pressure forging device is characterized in that a high-pressure inner cylinder (4) is installed in the high-medium pressure outer cylinder (3), a high-medium pressure forging rotor (5) is arranged in the high-medium pressure outer cylinder (3), the high-medium pressure forging rotor (5) is arranged in the high-pressure inner cylinder (4) at the same time, the front end of the high-medium pressure forging rotor (5) is installed in a matched mode with a front bearing box (1), and the rear end of the high-medium pressure forging rotor (5) is installed in a matched mode with a rear bearing box (2).

2. A 60MW reaction intermediate inlet single reheat air turbine as claimed in claim 1 wherein: still include exhaust guide box (7), rear bearing box (2) are arranged and are installed in the inside of exhaust guide box (7), the front end of high-and-medium pressure outer cylinder (3) is equipped with cat claw (6), the front end of high-and-medium pressure outer cylinder (3) is installed through cat claw (6) and front bearing box (1) cooperation, the rear end of high-and-medium pressure outer cylinder (3) adopts the flange mode to install on exhaust guide box (7).

3. A 60MW reaction intermediate inlet single reheat air turbine as claimed in claim 1 wherein: the front end of the high-medium pressure outer cylinder (3) is also connected with the front bearing box (1) through a centering beam structure (8).

4. A 60MW reaction intermediate inlet single reheat air turbine as claimed in any one of claims 1-3 wherein: the high-medium pressure outer cylinder (3) comprises an upper cylinder body (9) and a lower cylinder body (10), a main air inlet (11) is formed in the upper cylinder body (9), and a main air outlet (12) and a primary reheating air inlet (13) are formed in the lower cylinder body (10).

5. A60 MW reaction intermediate inlet single reheat air turbine as claimed in claim 4 wherein: the main air inlet (11) is tangentially arranged on the high-medium pressure outer cylinder (3); and a main air adjusting combined valve (14) is directly connected to the main air inlet (11).

6. A 60MW reaction intermediate inlet single reheat air turbine as claimed in claim 1 wherein: and a front end shaft air seal (15) is arranged between the front end of the high and medium pressure outer cylinder (3) and the high and medium pressure whole forging rotor (5).

7. A 60MW reaction intermediate inlet single reheat air turbine as claimed in claim 1 wherein: the inner wall of the high-medium pressure outer cylinder (3) is provided with a plurality of stages of first stationary blades (17) through a clapboard sleeve (16), and the high-medium pressure integrally-forged rotor (5) is provided with a plurality of stages of first moving blades (18) matched with the plurality of stages of first stationary blades (17);

and a plurality of stages of second stationary blades (19) are installed on the inner wall of the high-pressure inner cylinder (4), and a plurality of stages of second moving blades (20) matched with the plurality of stages of second stationary blades (19) are installed on the high-medium pressure swaged rotor (5).

8. A 60MW reaction intermediate inlet single reheat air turbine as claimed in claim 2 wherein: the exhaust guide box (7) is provided with an air inlet opening (21) and an exhaust opening (22), an exhaust guide cover (23) arranged in a horn shape is arranged in the exhaust guide box (7), and a steady flow guide plate (24) is arranged in an inlet of the exhaust guide cover (23).

9. A 60MW reaction intermediate inlet single reheat air turbine as claimed in claim 1 wherein: the rear bearing box (2) comprises an outer layer box body (25) and an inner layer bearing box (26), the inner layer bearing box (26) is installed in the outer layer box body (25), the outer layer box body (25) and the inner layer bearing box (26) form an interlayer structure, and the rear end of the high and medium pressure whole forging rotor (5) penetrates through the outer layer box body (25) and then is installed in the inner layer bearing box (26) through a supporting bearing.

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