1000MW steam turbine generator stator frame

Abstract

The utility model provides a 1000MW steam turbine generator stator frame. The 1000MW steam turbine generator stator frame comprises an excitation end frame, a first middle frame, a second middle frame and a steam end frame. And the excitation end engine base, the first middle engine base, the second middle engine base and the steam end engine base are sequentially welded and assembled. Base bases are welded to the bottoms of the first middle base and the second middle base. The two sides of the first middle machine base and the two sides of the second middle machine base are connected with four or more lifting bar bases respectively, and the lifting bar bases are symmetrically arranged. A top plate is arranged at the tops of the excitation end engine base, the first middle engine base, the second middle engine base and the steam end engine base; and the top plate is sequentially welded and fixed with the excitation end engine base, the first middle engine base, the second middle engine base and the steam end engine base. The 1000MW steam turbine generator stator frame provided by the utility model is integrally assembled after being welded in sections, so that the deformation in the welding process is reduced, the production difficulty is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of generators, and particularly relates to a stator frame of a 1000MW steam turbine generator. Background Art

[0002] The stator frame of a 1000MW steam turbine generator is an important component of such a large generator. It undertakes the tasks of supporting and fixing the stator core and stator winding, and is also a main component of the air duct system. This stator frame is a steel plate welded structure, which is light and strong. The stator frame of a 1000MW steam turbine generator requires high concentricity, excellent perpendicularity, and high welding quality. However, during the production process, due to its huge volume and the welding process adopted, it is prone to deformation, which affects the assembly process and directly affects the performance and safe operation of the generator.

[0003] Therefore, the above problems need to be solved urgently. Summary of the Utility Model

[0004] Purpose of the utility model: In order to overcome the above deficiencies, the utility model provides a stator frame of a 1000MW steam turbine generator, which is assembled overall after segmented welding, reducing the deformation amount during the welding process, reducing the production difficulty, and improving the production efficiency.

[0005] Technical solution: In order to achieve the above purpose, the utility model provides a stator frame of a 1000MW steam turbine generator, including a frame. The frame includes an excitation end frame, a first intermediate frame, a second intermediate frame, and a steam end frame. The excitation end frame, the first intermediate frame, the second intermediate frame, and the steam end frame are arranged in sequence. The bottoms of the first intermediate frame and the second intermediate frame are welded with a frame base. The two sides of the first intermediate frame and the second intermediate frame are respectively connected with lifting lug seats. There are 4 or more lifting lug seats, and the lifting lug seats are symmetrically arranged. The tops of the excitation end frame, the first intermediate frame, the second intermediate frame, and the steam end frame are provided with top plates, and the excitation end frame, the first intermediate frame, the second intermediate frame, the steam end frame, and the top plates are welded and fixed in sequence. The stator frame of the 1000MW steam turbine generator of the utility model has a large volume and weight, and is prone to deformation during the welding process. Due to the large number of layers in the middle section frame, shrinkage deformation is prone to occur. Assembling overall after segmented welding reduces the deformation amount during the welding process, reduces the production difficulty, and improves the production efficiency.

[0006] Furthermore, in the stator frame of the above-mentioned 1000MW steam turbine generator, the exciter end frame includes an exciter end plate and an exciter end spacer ring. There are multiple exciter end spacer rings. On both sides of the exciter end plate and the exciter end spacer ring, there are exciter end outer cover plates, which connect and fix the exciter end plate and the exciter end spacer ring. There is an exciter end support rib between the exciter end plate and the exciter end spacer ring, and both ends of the exciter end support rib are respectively connected to the exciter end plate and the exciter end spacer ring. The exciter end plate is supported by the support rib to ensure the structural strength of the exciter end of the frame. The exciter end plate and the exciter end spacer ring are connected through the exciter end outer cover plate and the top plate at the top to ensure the structural strength of the exciter end frame.

[0007] Furthermore, in the stator frame of the above-mentioned 1000MW steam turbine generator, an exciter end side plate is welded to the lower side of the exciter end frame, and an exciter end bottom plate is connected to the bottom surface of the exciter end side plate. The exciter end plate and the exciter end spacer ring are connected through the exciter end outer cover plate, and the top plate at the top and the exciter end bottom plate ensure the structural strength of the exciter end frame, reduce the use of support ribs, reduce the welding positions, and reduce the deformation of the exciter end frame caused by welding.

[0008] Furthermore, in the stator frame of the above-mentioned 1000MW steam turbine generator, the steam end frame includes a steam end plate and a steam end spacer ring. There are multiple steam end spacer rings. On both sides of the steam end plate and the steam end spacer ring, there are steam end outer cover plates, which connect and fix the steam end plate and the steam end spacer ring. There is a steam end support rib between the steam end plate and the steam end spacer ring, and both ends of the steam end support rib are respectively connected to the steam end plate and the steam end spacer ring.

[0009] Furthermore, in the stator frame of the above-mentioned 1000MW steam turbine generator, a steam end side plate is welded to the lower side of the steam end frame, and a steam end bottom plate is connected to the bottom surface of the steam end side plate. The steam end plate and the steam end spacer ring are connected through the steam end outer cover plate, and the top plate at the top and the steam end bottom plate ensure the structural strength of the steam end frame, reduce the use of support ribs, reduce the welding positions, and reduce the deformation of the steam end frame caused by welding.

[0010] Furthermore, in the stator frame of the above-mentioned 1000MW steam turbine generator, the first intermediate frame includes a first intermediate partition. There are multiple first intermediate partitions. On both sides of the first intermediate partition, there are first intermediate cover plates, which connect and fix the multiple first intermediate cover plates.

[0011] Furthermore, in the stator frame of the above-mentioned 1000MW steam turbine generator, the second intermediate frame includes a second intermediate partition. There are multiple second intermediate partitions. On both sides of the second intermediate partition, there are second intermediate cover plates, which connect and fix the multiple second intermediate cover plates.

[0012] Further, in the stator frame of the 1000MW steam turbine generator mentioned above, support rods are passed through the frame. The support rods are sequentially connected to the exciter end frame, the first intermediate frame, the second intermediate frame, and the turbine end frame. The support rods are arranged in a circumferential array along the axis of the stator frame of the steam turbine generator.

[0013] Further, in the stator frame of the 1000MW steam turbine generator mentioned above, through holes are provided at the top of the frame. A plurality of through holes are arranged in an array, and the through holes penetrate from the exciter end frame to the turbine end frame.

[0014] Further, in the stator frame of the 1000MW steam turbine generator mentioned above, air ducts are provided on the lower side of the frame. The air ducts are arranged on both sides of the frame base, and the air ducts extend from the exciter end frame to the turbine end frame.

[0015] From the above technical solutions, it can be seen that the present utility model has the following beneficial effects: The stator frame of the 1000MW steam turbine generator of the present utility model is assembled as a whole after segmented welding, which reduces the deformation during the welding process, reduces the production difficulty, and improves the production efficiency. The use of support ribs is reduced, and the welding positions are reduced, which can reduce the deformation caused by welding. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 is a schematic diagram of the structure of the stator frame of the 1000MW steam turbine generator of the present utility model;

[0017] Figure 2 is a sectional view of the stator frame of the 1000MW steam turbine generator of the present utility model.

[0018] In the figure: 1. Exciter end frame, 11. Exciter end end plate, 12. Exciter end spacer ring, 121. Exciter end side plate, 13. Exciter end outer cover plate, 14. Exciter end support rib, 15. Exciter end bottom plate, 2. First intermediate frame, 21. First intermediate partition, 22. First intermediate cover plate, 3. Second intermediate frame, 31. Second intermediate partition, 32. Second intermediate cover plate, 4. Turbine end frame, 41. Turbine end end plate, 42. Turbine end spacer ring, 421. Turbine end side plate, 43. Turbine end outer cover plate, 44. Turbine end support rib, 45. Turbine end bottom plate, 5. Frame base, 6. Hoisting seat, 7. Top plate, 8. Support rod, 9. Through hole, 10. Air duct. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] Embodiment 1

[0020] As Figure 1A stator frame of a 1000MW-class turbogenerator shown in the figure includes an excitation-end frame 1, a first intermediate frame 2, a second intermediate frame 3, and a steam-end frame 4. The excitation-end frame 1, the first intermediate frame 2, the second intermediate frame 3, and the steam-end frame 4 are arranged in sequence. The bottom of the first intermediate frame 2 and the second intermediate frame 3 is welded with a frame base 5. Hoisting seat brackets 6 are respectively connected to both sides of the first intermediate frame 2 and the second intermediate frame 3. There are 4 or more hoisting seat brackets 6, and the hoisting seat brackets 6 are symmetrically arranged. A top plate 7 is provided at the top of the excitation-end frame 1, the first intermediate frame 2, the second intermediate frame 3, and the steam-end frame 4. The excitation-end frame 1, the first intermediate frame 2, the second intermediate frame 3, the steam-end frame 4, and the top plate 7 are welded and fixed in sequence. A through hole 9 is provided at the top of the frame. A plurality of through holes 9 are arranged in an array, and the through holes 9 penetrate from the excitation-end frame 1 to the steam-end frame 4. An air duct 10 is provided on the lower side of the frame. The air duct 10 is arranged on both sides of the frame base 5, and the air duct 10 extends from the excitation-end frame 1 to the steam-end frame 4.

[0021] As Figure 2The stator frame of a 1000MW steam turbine generator shown, the exciter end frame 1 includes an exciter end plate 11 and an exciter end spacer ring 12. There are multiple exciter end spacer rings 12. On both sides of the exciter end plate 11 and the exciter end spacer ring 12, there are exciter end outer cover plates 13 respectively, and the exciter end outer cover plates 13 connect and fix the exciter end plate 11 and the exciter end spacer ring 12. Between the exciter end plate 11 and the exciter end spacer ring 12, there is an exciter end support rib 14, and both ends of the exciter end support rib 14 are respectively connected to the exciter end plate 11 and the exciter end spacer ring 12. On the lower side of the exciter end frame 1, there is an exciter end side plate 121 welded, and the bottom surface of the exciter end side plate 121 is connected to an exciter end bottom plate 15. By connecting the exciter end plate 11 and the exciter end spacer ring 12 through the exciter end outer cover plate 13, combined with the top plate 7 and the exciter end bottom plate 15 at the top, the structural strength of the exciter end frame 1 is ensured. The steam end frame 4 includes a steam end plate 41 and a steam end spacer ring 42. There are multiple steam end spacer rings 42. On both sides of the steam end plate 41 and the steam end spacer ring 42, there are steam end outer cover plates 43 respectively, and the steam end outer cover plates 43 connect and fix the steam end plate 41 and the steam end spacer ring 42. Between the steam end plate 41 and the steam end spacer ring 42, there is a steam end support rib 44, and both ends of the steam end support rib 14 are respectively connected to the steam end plate 41 and the steam end spacer ring 42. On the lower side of the steam end frame 4, there is a steam end side plate 421 welded, and the bottom surface of the steam end side plate 421 is connected to a steam end bottom plate 45. By connecting the steam end plate 41 and the steam end spacer ring 42 through the steam end outer cover plate 43, combined with the top plate 7 and the steam end bottom plate 45 at the top, the structural strength of the steam end frame 4 is ensured. The first intermediate frame 2 includes a first intermediate partition plate 21. There are multiple first intermediate partition plates 21. On both sides of the first intermediate partition plate 21, there are first intermediate cover plates 22, and the first intermediate cover plates 22 connect and fix the multiple first intermediate cover plates 22. The second intermediate frame 3 includes a second intermediate partition plate 31. There are multiple second intermediate partition plates 31. On both sides of the second intermediate partition plate 31, there are second intermediate cover plates 32, and the second intermediate cover plates 32 connect and fix the multiple second intermediate cover plates 32. A support rod 8 passes through the frame, and the support rod 8 is successively connected to the exciter end frame 1, the first intermediate frame 2, the second intermediate frame 3, and the steam end frame 4. The support rod 8 is arranged in a circumferential array along the axis of the stator frame of the steam turbine generator.

[0022] The above embodiments are exemplary. The purpose is to illustrate the technical concept and characteristics of the present invention so that those skilled in this field can understand the content of the present invention and implement it accordingly. However, it cannot be used to limit the protection scope of the present invention. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims

1. A 1000MW steam turbine generator stator frame, characterized in that: The invention comprises a machine base, wherein the machine base comprises an excitation end machine base (1), a first intermediate machine base (2), a second intermediate machine base (3), and a steam end machine base (4); the excitation end machine base (1), the first intermediate machine base (2), the second intermediate machine base (3), and the steam end machine base (4) are arranged in sequence; a machine base base (5) is welded to the bottom of the first intermediate machine base (2) and the second intermediate machine base (3); hanging seats (6) are connected to both sides of the first intermediate machine base (2) and the second intermediate machine base (3), respectively, and the hanging seats (6) are provided with 4 or more, and the hanging seats (6) are symmetrically arranged; a top plate (7) is provided on the top of the excitation end machine base (1), the first intermediate machine base (2), the second intermediate machine base (3), and the steam end machine base (4); the excitation end machine base (1), the first intermediate machine base (2), the second intermediate machine base (3), the steam end machine base (4), and the top plate (7) are welded and fixed in sequence.

2. The 1000MW steam turbine generator stator frame according to claim 1, characterized in that: The excitation end machine base (1) comprises an excitation end end plate (11) and an excitation end spacer ring (12), wherein a plurality of the excitation end spacer rings (12) are provided, and excitation end outer cover plates (13) are provided on both sides of the excitation end end plate (11) and the excitation end spacer ring (12), wherein the excitation end outer cover plates (13) connect and fix the excitation end plate (11) and the excitation end spacer ring (12); an excitation end support rib (14) is provided between the excitation end plate (11) and the excitation end spacer ring (12), and the two ends of the excitation end support rib (14) are respectively connected to the excitation end plate (11) and the excitation end spacer ring (12).

3. The 1000MW steam turbine generator stator frame according to claim 1, characterized in that: An excitation end side plate (121) is welded to the lower side of the excitation end machine base (1), and the bottom surface of the excitation end side plate (121) is connected to an excitation end bottom plate (15).

4. The 1000MW steam turbine generator stator frame according to claim 1, characterized in that: The steam end machine base (4) comprises a steam end end plate (41) and a steam end spacer ring (42), wherein a plurality of steam end spacer rings (42) are provided, and steam end outer cover plates (43) are provided on both sides of the steam end end plate (41) and the steam end spacer ring (42), respectively, and the steam end outer cover plates (43) connect and fix the steam end end plate (41) and the steam end spacer ring (42); a steam end support rib (44) is provided between the steam end end plate (41) and the steam end spacer ring (42), and the two ends of the steam end support rib (44) are respectively connected to the steam end plate (41) and the steam end spacer ring (42).

5. The 1000MW steam turbine generator stator frame according to claim 1, characterized in that: A steam end side plate (421) is welded to the lower side of the steam end machine base (4), and a steam end bottom plate (45) is connected to the bottom surface of the steam end side plate (421).

6. The 1000MW steam turbine generator stator frame according to claim 1, characterized in that: The first intermediate machine base (2) comprises a first intermediate partition plate (21), a plurality of the first intermediate partition plates (21) are provided, first intermediate cover plates (22) are provided on both sides of the first intermediate partition plate (21), and the first intermediate cover plates (22) connect and fix the plurality of first intermediate cover plates (22).

7. The 1000MW steam turbine generator stator frame according to claim 1, characterized in that: The second intermediate machine base (3) comprises a second intermediate partition plate (31), a plurality of the second intermediate partition plates (31) are provided, second intermediate cover plates (32) are provided on both sides of the second intermediate partition plate (31), and the second intermediate cover plates (32) connect and fix the plurality of second intermediate cover plates (32).

8. The 1000MW steam turbine generator stator frame according to claim 1, characterized in that: The machine base is provided with support rods (8), the support rods (8) are sequentially connected to the excitation end machine base (1), the first intermediate machine base (2), the second intermediate machine base (3), and the steam end machine base (4), and the support rods (8) are arranged in a surrounding array along the axis of the steam turbine generator stator machine base.

9. The 1000MW steam turbine generator stator frame according to claim 1, characterized in that: A through hole (9) is provided on the top of the machine base, and a plurality of through holes (9) are provided in an array, wherein the through holes (9) pass from the excitation end machine base (1) to the steam end machine base (4).

10. The 1000MW steam turbine generator stator frame according to claim 1, characterized in that: An air duct (10) is provided on the lower side of the machine base, the air duct (10) is provided on both sides of the machine base base (5), and the air duct (10) extends from the excitation end machine base (1) to the steam end machine base (4).

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