A stator frame structure of a steam turbine generator

Abstract

This utility model relates to a stator frame structure for a steam turbine generator, belonging to the technical field of steam turbine generators. It includes an upper frame, with a lower frame connected to its bottom. A sealing assembly is provided at the joint surface of the upper and lower frames, and multiple fixing components are provided at the joint. Each fixing component includes an upper block, which is fixedly connected to the upper frame. A gasket is fixedly connected to the bottom of the upper block, and a pad is fixedly connected to the side of the gasket away from the upper block. A lower block is fixedly connected to the end of the pad away from the gasket, and the lower block is fixedly connected to the lower frame. This utility model's stator frame structure for a steam turbine generator, with multiple fixing components on both sides, increases the rigid connection points between the upper and lower frames, improving the connection rigidity while allowing for rigidity adjustment, significantly reducing the vibration problem of the upper frame. The sealing strip is embedded in the C-shaped bend of the lower frame, greatly reducing the movement of the sealing strip during operation, thereby ensuring sealing performance.

Description

Technical Field

[0001] This utility model relates to the field of steam turbine generator technology, and in particular to a stator frame structure for a steam turbine generator. Background Technology

[0002] The function of the stator frame is to fix, support, and protect the stator core and stator windings, while also forming a ventilation circulation loop. Large steam turbine generator stator frames are large and complex in shape. Their structure must meet strength requirements while also maximizing ease of machining and manufacturability. For air-cooled generators with lower air pressure and less stringent sealing requirements for the stator core and end structures, an upper and lower Haval frame structure is commonly used. This design is simple to install, disassemble, and facilitates maintenance. Currently, there are two main structural types. One type requires integral machining of the upper and lower Haval mating surfaces, using bolts and nuts to connect the upper and lower Haval frames. This structure involves a large amount of machining, typically requiring many bolts, resulting in high manufacturing costs. The other structure uses a sealing ring directly between the upper and lower Haval surfaces of the upper frame and the lower frame. In this type, the sealing ring is often glued to the lower frame, which can easily lead to movement during operation, resulting in poor sealing performance. Meanwhile, the upper and lower base sections of the current model do not directly contact each other, and the rigid connection point is only at the generator end support plate. Due to the small rigid contact area, this type of structure is prone to excessive vibration of the upper base, and the vibration problem is particularly severe when the base is long. Utility Model Content

[0003] To address the above problems, a stator frame structure for a steam turbine generator is proposed.

[0004] The technical solution of this utility model is: a stator frame structure for a steam turbine generator, including an upper frame, a lower frame connected to the bottom of the upper frame, a sealing component provided on the mating surface of the upper frame and the lower frame, and multiple fixing components provided at the joint between the upper frame and the lower frame.

[0005] The fixing assembly includes an upper mounting block, which is fixedly connected to the upper base. A gasket is fixedly connected to the bottom of the upper mounting block. A pad is fixedly connected to the side of the pad away from the upper mounting block. A lower mounting block is fixedly connected to the end of the pad away from the gasket. The lower mounting block is fixedly connected to the lower base.

[0006] Preferably, the fixing component further includes fasteners, which are threaded through the upper block, gasket, pad, and lower block, and the upper block, gasket, pad, and lower block are sequentially fixed together by the fasteners.

[0007] Preferably, the sealing assembly includes a channel steel and a sealing strip. The inner side of the groove of the channel steel abuts against the sealing strip. The side of the channel steel away from the sealing strip is fixedly connected to the upper base. The side of the sealing strip away from the channel steel is fixedly connected to a C-shaped bend plate. The C-shaped bend plate is fixedly connected to the lower base.

[0008] The beneficial effects of this utility model are as follows: This utility model provides a stator frame structure for a steam turbine generator, which has multiple fixing components on both sides to increase the rigid connection points between the upper and lower frames, improve the connection rigidity of the upper and lower frames, and make the rigidity adjustable, thus greatly reducing the vibration problem of the upper frame; the sealing strip is embedded in the C-shaped bent plate of the lower frame, which greatly reduces the movement of the sealing strip during operation, thereby ensuring the sealing performance. Attached Figure Description

[0009] Figure 1 This is a perspective view of the stator frame structure of the steam turbine generator of this utility model;

[0010] Figure 2 This is a front sectional view of the sealing assembly of this utility model;

[0011] Figure 3 This is a front view of the fixing component of this utility model.

[0012] The component names corresponding to the various reference numerals in the diagram are as follows:

[0013] 1. Upper base; 2. Sealing assembly; 21. Channel steel; 22. Sealing strip; 23. C-shaped bend plate; 3. Fixing assembly; 31. Upper mounting block; 32. Fastener; 33. Gasket; 34. Pad; 35. Lower mounting block; 4. Lower base. Detailed Implementation

[0014] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. This embodiment is based on the technical solution of the present invention and provides detailed implementation methods and specific operating procedures; however, the scope of protection of the present invention is not limited to the following embodiments.

[0015] refer to Figure 1 As shown in the figure, this application discloses a stator frame structure for a steam turbine generator, including an upper frame 1, a lower frame 4 connected to the bottom of the upper frame 1, a sealing component 2 provided on the mating surface of the upper frame 1 and the lower frame 4, and a plurality of fixing components 3 provided at the joint between the upper frame 1 and the lower frame 4.

[0016] refer to Figure 2 As shown, the sealing assembly 2 includes a channel steel 21 and a sealing strip 22. The groove of the channel steel 21 is set downward, and the inner side of the groove of the channel steel 21 abuts against the sealing strip 22. The side of the channel steel 21 away from the sealing strip 22 is fixedly connected to the bottom surface of the upper machine base 1 by welding. The side of the sealing strip 22 away from the channel steel 21 is fixedly connected to a C-shaped bent plate 23. The C-shaped bent plate 23 is fixedly connected to the top surface of the lower machine base 4 by welding. Since the sealing strip 22 is located between the lower machine base 4 and the channel steel 21, the joint surface of the upper machine base 1 and the lower machine base 4 is sealed by the self-weight of the upper machine base 1 compressing the sealing strip 22 on the inner side of the groove of the channel steel 21. Therefore, the joint surface of the upper machine base 1 and the lower machine base 4 does not need to be processed.

[0017] Specifically, the opening of the C-shaped bend 23 is embedded inside the sealing strip 22, thereby fixing the C-shaped bend 23 and the sealing strip 22 together.

[0018] refer to Figure 3 As shown, the fixing component 3 includes an upper mounting block 31, the side of the upper mounting block 31 is welded to the side of the upper base 1, the bottom of the upper mounting block 31 is fixedly connected to a gasket 33, the side of the gasket 33 away from the upper mounting block 31 is fixedly connected to a gasket 34, the end of the gasket 34 away from the gasket 33 is fixedly connected to a lower mounting block 35, and the side of the lower mounting block 35 is welded to the side of the lower base 4.

[0019] Specifically, the fixing component 3 also includes a fastener 32, which can be a bolt. The fastener 32 is threaded through the upper block 31, the gasket 33, the pad 34, and the lower block 35. The upper block 31, the gasket 33, the pad 34, and the lower block 35 are sequentially fixedly connected by the fastener 32.

[0020] The specific working method is as follows:

[0021] During installation, the lower base 4 is positioned, and the sealing strip 22 is fixedly connected to the C-shaped bent plate 23 on the lower base 4. The sealing strip 22 inside the channel steel 21 is compressed by the self-weight of the upper base 1 to achieve sealing. After the position of the upper base 1 is adjusted, a pad 34 is placed between the upper block 31 and the lower block 35 of the corresponding fixing component 3. Then, the gap between the upper block 31 and the pad 34 is filled with a shim 33, and the fastener 32 is tightened.

[0022] The beneficial effects are:

[0023] This utility model discloses a stator frame structure for a steam turbine generator. Multiple fixing components 3 are provided on both sides to increase the rigid connection points between the upper and lower frames, thereby improving the connection rigidity of the upper and lower frames while making the rigidity adjustable, which greatly reduces the vibration problem of the upper frame. The sealing strip 22 is embedded in the C-shaped bent plate 23 of the lower frame 4, which greatly reduces the movement of the sealing strip 22 during operation, thus ensuring the sealing performance.

[0024] It should be noted that the terms "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. The terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. "A plurality of" means two or more. "Installed," "connected," and "joined" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection.

[0025] The above description is merely a preferred embodiment of this utility model and is not intended to limit this utility model in any form or substance. It should be noted that those skilled in the art can make various improvements and additions without departing from this utility model, and these improvements and additions should also be considered within the protection scope of this utility model. Any modifications, alterations, and equivalent changes made by those skilled in the art without departing from the spirit and scope of this utility model using the disclosed technical content are equivalent embodiments of this utility model. Furthermore, any modifications, alterations, and evolutions made to the above embodiments based on the essential technology of this utility model are still within the scope of the technical solution of this utility model.

Claims

1. A stator frame structure for a steam turbine generator, characterized in that, It includes an upper base (1), the bottom of the upper base (1) is connected to the lower base (4), the mating surfaces of the upper base (1) and the lower base (4) are provided with sealing components (2), and the joint between the upper base (1) and the lower base (4) is provided with multiple fixing components (3). The fixing component (3) includes an upper mounting block (31), which is fixedly connected to the upper base (1). A gasket (33) is fixedly connected to the bottom of the upper mounting block (31). A pad (34) is fixedly connected to the side of the pad (33) away from the upper mounting block (31). A lower mounting block (35) is fixedly connected to the end of the pad (34) away from the pad (33). The lower mounting block (35) is fixedly connected to the lower base (4).

2. The stator frame structure of the steam turbine generator according to claim 1, characterized in that, The fixing component (3) also includes a fastener (32), which is threaded through the upper block (31), gasket (33), pad (34), and lower block (35). The upper block (31), gasket (33), pad (34), and lower block (35) are sequentially fixedly connected by the fastener (32).

3. The stator frame structure of the steam turbine generator according to claim 1, characterized in that, The sealing assembly (2) includes a channel steel (21) and a sealing strip (22). The inner side of the groove of the channel steel (21) abuts against the sealing strip (22). The side of the channel steel (21) away from the sealing strip (22) is fixedly connected to the upper base (1). The side of the sealing strip (22) away from the channel steel (21) is fixedly connected to a C-shaped bend plate (23). The C-shaped bend plate (23) is fixedly connected to the lower base (4).

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