Butt-joint type three-section split-half stator base of multi-wind-area high-pressure hydrogen-cooled generator

Abstract

The invention discloses a butt joint type three-section split-half stator base of a multi-wind-area high-pressure hydrogen-cooled generator, and belongs to the technical field of steam turbine generators, the butt joint type three-section split-half stator base comprises a base body and a straight ventilation pipe, the base body is of a split structure, and the base body comprises a steam end cover, a middle section stator base and an excitation end cover; the middle-section stator base is located between the steam end cover and the excitation end cover, the middle-section stator base is fixedly connected with the steam end cover and the excitation end cover, a plurality of hot air cavities and cold air cavities are formed in the middle-section stator base and are arranged at intervals, any two adjacent hot air cavities are communicated through a straight ventilation pipe, and the straight ventilation pipe is communicated with the hot air cavities. The middle stator base comprises an upper base and a lower base which are fixedly connected, and a small fan cover is fixed on the lower base. Physical isolation is more thorough in the high-pressure hydrogen cooling environment, air path control is more accurate, the device is more suitable for the complex multi-air-area requirement, and cooling uniformity and heat exchange efficiency are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of steam turbine generator technology, and in particular to a three-section split stator frame for a multi-zone high-pressure hydrogen-cooled generator. Background Technology

[0002] The frame of a large high-pressure hydrogen-cooled generator is a welded steel plate shell structure with sufficient strength and rigidity. Its function is to support the stator core and stator coils and form a specific cooling gas flow channel. For high-pressure hydrogen-cooled generators, the hydrogen pressure in the generator is as high as 0.3-0.6 MPa. As a sealed container for hydrogen, the frame must be able to withstand the impact of an accidental hydrogen explosion inside the generator. Therefore, the frame of a hydrogen-cooled generator requires both sufficient strength and rigidity to prevent damage and deformation caused by high hydrogen pressure, and must ensure the frame's airtightness to prevent hydrogen leakage.

[0003] As generator capacity continues to increase, the size and weight of generators also increase. This is especially true in inland areas, where the transportation of generator stators restricts the development of generator capacity.

[0004] Chinese patent document CN101202475A, published on June 18, 2008, discloses a composite structure generator stator frame. Its features include: a detachable structure where the top of the composite structure generator stator frame is bolted to a U-shaped generator stator frame by a cooler cover containing an axial ventilation channel; the outer skin of the U-shaped generator stator frame is composed of arcs with different radii of curvature; the top of the U-shaped generator stator frame has a planar connecting flange and ventilation holes that connect with the cooler cover; the base expands to form an axial air duct; the cooler cover contains an axial ventilation channel, which is located between the cooler and the U-shaped generator stator frame, with a first axial channel for cold air in the middle and a second axial channel for hot air on the outer side; the connecting flange surface is a planar structure, and the connecting flange surface has ventilation holes connecting the axial ventilation channel to various air zones of the generator stator.

[0005] The composite generator stator frame disclosed in this patent document is characterized by its compact structure and light weight, enabling the overall rail transport of a 1000MW steam turbine generator stator, thus avoiding on-site assembly of the generator's inner and outer stators. However, it is not suitable for complex, multi-wind zones, and its cooling uniformity and heat exchange efficiency are suboptimal. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, this invention provides a three-section split stator frame for a multi-zone high-pressure hydrogen-cooled generator. This invention provides more thorough physical isolation in a high-pressure hydrogen-cooled environment, more precise airflow control, and better adaptability to complex multi-zone requirements, significantly improving cooling uniformity and heat exchange efficiency.

[0007] This invention is achieved through the following technical solution: A three-section split stator frame for a multi-zone high-pressure hydrogen-cooled generator, comprising a frame body and a straight ventilation duct, characterized in that: the frame body is a split structure, comprising a steam end cover, a middle stator frame, and an exciter end cover, the middle stator frame being located between the steam end cover and the exciter end cover, the middle stator frame being fixedly connected to both the steam end cover and the exciter end cover respectively, the middle stator frame having multiple hot air chambers and cold air chambers arranged at intervals, any two adjacent hot air chambers being connected through a straight ventilation duct, the middle stator frame comprising an upper frame and a lower frame, the upper frame and the lower frame being fixedly connected, and a small wind hood being fixed on the lower frame.

[0008] There are two small air hoods, one located on one side of the bottom of the lower base and the other located on the other side of the bottom of the lower base.

[0009] A reinforcing clamping plate and clamping bolts are provided between the upper and lower machine bases, and the upper and lower machine bases are connected by the reinforcing clamping plate.

[0010] The lower base is provided with a sealing groove, which is located at the joint of the lower base, and a rubber round strip or rectangular rubber strip is embedded in the sealing groove.

[0011] A sealing cover is provided on the lower base, and the sealing cover is located at the joint of the lower base. The upper base and the lower base are sealed together by an airtight weld.

[0012] The upper base is provided with four threaded through holes along the axial direction, and the spacing between any two adjacent threaded through holes is the same.

[0013] The upper base is equipped with a hydrogen charging pipe, one end of which extends into the steam end cover and the other end of which extends into the excitation end cover.

[0014] The hydrogen charging pipe is arranged axially along the top of the upper base.

[0015] Both the upper and lower machine bases are provided with C-shaped sealing grooves at their ends, and sealing strips are embedded in the C-shaped sealing grooves.

[0016] One end of the intermediate stator frame is sealed to the steam end cover, and the other end of the intermediate stator frame is sealed to the excitation end cover.

[0017] The beneficial effects of this invention are mainly reflected in the following aspects: I. This invention features a split-type frame body, comprising a steam end cover, a mid-section stator frame, and an exciter end cover. The mid-section stator frame is located between the steam end cover and the exciter end cover, and is fixedly connected to both the steam end cover and the exciter end cover. Multiple hot air chambers and cold air chambers are provided on the mid-section stator frame, arranged at intervals. Any two adjacent hot air chambers are connected via a straight ventilation duct. The mid-section stator frame includes an upper frame and a lower frame, which are fixedly connected. A small hood is fixed on the lower frame. Compared to existing technologies, this invention provides more thorough physical isolation in a high-pressure hydrogen cooling environment, more precise airflow control, and better adaptability to complex multi-airflow requirements, significantly improving cooling uniformity and heat exchange efficiency. II. In this invention, there are two small wind hoods. One small wind hood is located on one side of the bottom of the lower base, and the other small wind hood is located on the other side of the bottom of the lower base. The two small wind hoods are symmetrically distributed on both sides of the bottom of the lower base, which forces the cooling hydrogen to flow in both directions, completely eliminates the low-speed vortex zone at the bottom, and controls the axial air volume distribution uniformity deviation within ±5%. At the same time, it expands the capacity of the hot air flowing into the base from the generator core, reduces the wind speed entering the cooler by more than 10%, and significantly improves the heat exchange efficiency of the cooler. Third, in this invention, a sealing groove is provided on the lower base. The sealing groove is located at the joint of the lower base. A rubber round strip or a rectangular rubber strip is embedded in the sealing groove. By providing a sealing groove with a rubber round strip or a rectangular rubber strip embedded in the joint surface of the lower base, a radial self-tightening dynamic sealing interface is formed, which can effectively avoid hydrogen sealing failure of the joint surface of the split base. IV. In this invention, a sealing cover is provided on the lower base. The sealing cover is located at the joint of the lower base. The upper base and the lower base are sealed together by an airtight weld. By adding a sealing cover and performing an airtight weld at the joint of the upper and lower bases, a rigid welded sealing barrier is constructed, eliminating hydrogen permeation paths caused by the split structure and meeting the zero leakage requirements of nuclear power plants.

[0018] V. In this invention, both the upper and lower bases are provided with C-shaped sealing grooves, and sealing strips are embedded in the C-shaped sealing grooves. The thermal deformation adaptive compensation is achieved by utilizing the triaxial constraint effect of the cross section, so that the high-pressure hydrogen leakage rate under the dynamic working condition of the split base is stably controlled at ≤0.1% / day, and the problem of hydrogen sealing failure in the end corner area is completely solved.

[0019] VI. In this invention, one end of the middle stator frame is sealed to the steam end cover, and the other end of the middle stator frame is sealed to the excitation end cover. By constructing a two-stage collaborative sealing interface between the segmented frames, the dynamic leakage rate of high-pressure hydrogen under axial thermal deformation conditions is effectively reduced, ensuring the sealing effect.

[0020] VII. This invention not only ensures the rigidity, strength, and sealing of the base, but also improves the feasibility of transporting the stator base of the ultra-large hydrogen-cooled generator. Attached Figure Description The present invention will now be further described in detail with reference to the accompanying drawings and specific embodiments, wherein: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram of the straight ventilation duct arrangement of the hot air cavity of the present invention; Figure 3 for Figure 1 EE view; Figure 4 for Figure 1 FF view; Figure 5 for Figure 4 Enlarged view of the C-shaped sealing groove at point I; The markings in the diagram are: 1. Machine base body, 2. Straight ventilation pipe, 3. Steam end cover, 4. Intermediate stator base, 5. Excitation end cover, 6. Hot air chamber, 7. Cold air chamber, 8. Upper machine base, 9. Lower machine base, 10. Small air cover, 11. Reinforcing clamp plate, 12. Clamp bolt, 13. Sealing cover, 14. Hydrogen charging pipe, 15. C-type sealing groove, 16. Sealing strip. Detailed Implementation

[0021] Example 1 See Figure 1 and Figure 2 A three-section split stator frame for a multi-zone high-pressure hydrogen-cooled generator includes a frame body 1 and a straight ventilation pipe 2. The frame body 1 is a split structure, comprising a steam end cover 3, a middle stator frame 4, and an exciter end cover 5. The middle stator frame 4 is located between the steam end cover 3 and the exciter end cover 5, and is fixedly connected to both the steam end cover 3 and the exciter end cover 5. The middle stator frame 4 has multiple hot air chambers 6 and cold air chambers 7, which are arranged at intervals. Any two adjacent hot air chambers 6 are connected through the straight ventilation pipe 2. The middle stator frame 4 includes an upper frame 8 and a lower frame 9, which are fixedly connected. A small wind hood 10 is fixed on the lower frame 9.

[0022] This embodiment is the most basic implementation. The base body 1 is a split structure, including a steam end cover 3, a middle stator base 4, and an exciter end cover 5. The middle stator base 4 is located between the steam end cover 3 and the exciter end cover 5. The middle stator base 4 is fixedly connected to the steam end cover 3 and the exciter end cover 5 respectively. The middle stator base 4 has multiple hot air chambers 6 and cold air chambers 7, which are arranged at intervals. Any two adjacent hot air chambers 6 are connected by a straight ventilation pipe 2. The middle stator base 4 includes an upper base 8 and a lower base 9, which are fixedly connected. A small fan cover 10 is fixed on the lower base 9. Compared with the prior art, the physical isolation in the high-pressure hydrogen cooling environment is more thorough, the air path control is more precise, and it is more adaptable to the needs of complex multi-air zones, significantly improving cooling uniformity and heat exchange efficiency. Example 2 See Figure 1 and Figure 2 A three-section split stator frame for a multi-zone high-pressure hydrogen-cooled generator includes a frame body 1 and a straight ventilation pipe 2. The frame body 1 is a split structure, comprising a steam end cover 3, a middle stator frame 4, and an exciter end cover 5. The middle stator frame 4 is located between the steam end cover 3 and the exciter end cover 5, and is fixedly connected to both the steam end cover 3 and the exciter end cover 5. The middle stator frame 4 has multiple hot air chambers 6 and cold air chambers 7, which are arranged at intervals. Any two adjacent hot air chambers 6 are connected through the straight ventilation pipe 2. The middle stator frame 4 includes an upper frame 8 and a lower frame 9, which are fixedly connected. A small wind hood 10 is fixed on the lower frame 9.

[0023] Preferably, there are two small fan covers 10, one small fan cover 10 is located on one side of the bottom of the lower base 9, and the other small fan cover 10 is located on the other side of the bottom of the lower base 9.

[0024] A reinforcing clamping plate 11 and a clamping bolt 12 are provided between the upper base 8 and the lower base 9, and the upper base 8 and the lower base 9 are connected by the reinforcing clamping plate 11.

[0025] This embodiment is a preferred implementation. There are two small wind hoods 10. One small wind hood 10 is located on one side of the bottom of the lower base 9, and the other small wind hood 10 is located on the other side of the bottom of the lower base 9. The two small wind hoods 10 are symmetrically distributed on both sides of the bottom of the lower base 9, which forces the cooling hydrogen to flow in both directions, completely eliminates the low-speed vortex area at the bottom, and controls the axial air volume distribution uniformity deviation within ±5%. At the same time, it expands the capacity of the hot air flowing into the base from the generator core, reduces the wind speed entering the cooler by more than 10%, and significantly improves the heat exchange efficiency of the cooler. Example 3 See Figures 1-4A three-section split stator frame for a multi-zone high-pressure hydrogen-cooled generator includes a frame body 1 and a straight ventilation pipe 2. The frame body 1 is a split structure, comprising a steam end cover 3, a middle stator frame 4, and an exciter end cover 5. The middle stator frame 4 is located between the steam end cover 3 and the exciter end cover 5, and is fixedly connected to both the steam end cover 3 and the exciter end cover 5. The middle stator frame 4 has multiple hot air chambers 6 and cold air chambers 7, which are arranged at intervals. Any two adjacent hot air chambers 6 are connected through the straight ventilation pipe 2. The middle stator frame 4 includes an upper frame 8 and a lower frame 9, which are fixedly connected. A small wind hood 10 is fixed on the lower frame 9.

[0026] There are two small wind covers 10, one small wind cover 10 is located on one side of the bottom of the lower base 9, and the other small wind cover 10 is located on the other side of the bottom of the lower base 9.

[0027] A reinforcing clamping plate 11 and a clamping bolt 12 are provided between the upper base 8 and the lower base 9, and the upper base 8 and the lower base 9 are connected by the reinforcing clamping plate 11.

[0028] More preferably, the lower base 9 is provided with a sealing groove, which is located at the engagement point of the lower base 9, and a rubber round strip is embedded in the sealing groove.

[0029] This embodiment is another preferred implementation. A sealing groove is provided on the lower base 9. The sealing groove is located at the joint of the lower base 9. A rubber round strip is embedded in the sealing groove. By providing a sealing groove with a rubber round strip embedded in the joint surface of the lower base 9, a radial self-tightening dynamic sealing interface is formed, which can effectively avoid hydrogen sealing failure of the joint surface of the split base. Example 4 See Figures 1-4 A three-section split stator frame for a multi-zone high-pressure hydrogen-cooled generator includes a frame body 1 and a straight ventilation pipe 2. The frame body 1 is a split structure, comprising a steam end cover 3, a middle stator frame 4, and an exciter end cover 5. The middle stator frame 4 is located between the steam end cover 3 and the exciter end cover 5, and is fixedly connected to both the steam end cover 3 and the exciter end cover 5. The middle stator frame 4 has multiple hot air chambers 6 and cold air chambers 7, which are arranged at intervals. Any two adjacent hot air chambers 6 are connected through the straight ventilation pipe 2. The middle stator frame 4 includes an upper frame 8 and a lower frame 9, which are fixedly connected. A small wind hood 10 is fixed on the lower frame 9.

[0030] There are two small wind covers 10, one small wind cover 10 is located on one side of the bottom of the lower base 9, and the other small wind cover 10 is located on the other side of the bottom of the lower base 9.

[0031] A reinforcing clamping plate 11 and a clamping bolt 12 are provided between the upper base 8 and the lower base 9, and the upper base 8 and the lower base 9 are connected by the reinforcing clamping plate 11.

[0032] A sealing groove is provided on the lower base 9. The sealing groove is located at the joint of the lower base 9, and a rectangular rubber strip is embedded in the sealing groove.

[0033] A sealing cover 13 is provided on the lower base 9. The sealing cover 13 is located at the closing part of the lower base 9. The upper base 8 and the lower base 9 are sealed together by an airtight weld.

[0034] This embodiment is another preferred implementation. A sealing cover 13 is provided on the lower base 9. The sealing cover 13 is located at the joint of the lower base 9. The upper base 8 and the lower base 9 are connected by a gas-tight weld. By adding a sealing cover 13 and performing a gas-tight weld at the joint of the upper and lower base 9, a rigid welded sealing barrier is constructed to eliminate hydrogen permeation paths caused by the split structure and meet the zero leakage requirements of nuclear power plants.

[0035] Example 5 See Figures 1-5 A three-section split stator frame for a multi-zone high-pressure hydrogen-cooled generator includes a frame body 1 and a straight ventilation pipe 2. The frame body 1 is a split structure, comprising a steam end cover 3, a middle stator frame 4, and an exciter end cover 5. The middle stator frame 4 is located between the steam end cover 3 and the exciter end cover 5, and is fixedly connected to both the steam end cover 3 and the exciter end cover 5. The middle stator frame 4 has multiple hot air chambers 6 and cold air chambers 7, which are arranged at intervals. Any two adjacent hot air chambers 6 are connected through the straight ventilation pipe 2. The middle stator frame 4 includes an upper frame 8 and a lower frame 9, which are fixedly connected. A small wind hood 10 is fixed on the lower frame 9.

[0036] There are two small wind covers 10, one small wind cover 10 is located on one side of the bottom of the lower base 9, and the other small wind cover 10 is located on the other side of the bottom of the lower base 9.

[0037] A reinforcing clamping plate 11 and a clamping bolt 12 are provided between the upper base 8 and the lower base 9, and the upper base 8 and the lower base 9 are connected by the reinforcing clamping plate 11.

[0038] A sealing groove is provided on the lower base 9. The sealing groove is located at the engagement point of the lower base 9, and a rubber round strip is embedded in the sealing groove.

[0039] A sealing cover 13 is provided on the lower base 9. The sealing cover 13 is located at the closing part of the lower base 9. The upper base 8 and the lower base 9 are sealed together by an airtight weld.

[0040] The upper base 8 is provided with four threaded through holes along the axial direction, and the spacing between any two adjacent threaded through holes is the same.

[0041] The upper base 8 is provided with a hydrogen charging pipe 14, one end of which extends into the steam end cover 3, and the other end of which extends into the excitation end cover 5.

[0042] The hydrogen charging pipe 14 is arranged axially along the top of the upper base 8.

[0043] Both the upper base 8 and the lower base 9 are provided with C-shaped sealing grooves 15 at their ends, and sealing strips 16 are embedded in the C-shaped sealing grooves 15.

[0044] This embodiment is another preferred implementation. Both the upper base 8 and the lower base 9 are provided with C-shaped sealing grooves 15. The C-shaped sealing grooves 15 are embedded with sealing strips 16. The triaxial constraint effect of the cross section is used to realize adaptive compensation for thermal deformation, so that the high-pressure hydrogen leakage rate under the dynamic working condition of the split base is stably controlled at ≤0.1% / day, and the problem of hydrogen sealing failure in the end corner area is completely solved.

[0045] Example 6 See Figures 1-5 A three-section split stator frame for a multi-zone high-pressure hydrogen-cooled generator includes a frame body 1 and a straight ventilation pipe 2. The frame body 1 is a split structure, comprising a steam end cover 3, a middle stator frame 4, and an exciter end cover 5. The middle stator frame 4 is located between the steam end cover 3 and the exciter end cover 5, and is fixedly connected to both the steam end cover 3 and the exciter end cover 5. The middle stator frame 4 has multiple hot air chambers 6 and cold air chambers 7, which are arranged at intervals. Any two adjacent hot air chambers 6 are connected through the straight ventilation pipe 2. The middle stator frame 4 includes an upper frame 8 and a lower frame 9, which are fixedly connected. A small wind hood 10 is fixed on the lower frame 9.

[0046] There are two small wind covers 10, one small wind cover 10 is located on one side of the bottom of the lower base 9, and the other small wind cover 10 is located on the other side of the bottom of the lower base 9.

[0047] A reinforcing clamping plate 11 and a clamping bolt 12 are provided between the upper base 8 and the lower base 9, and the upper base 8 and the lower base 9 are connected by the reinforcing clamping plate 11.

[0048] A sealing groove is provided on the lower base 9. The sealing groove is located at the engagement point of the lower base 9, and a rubber round strip is embedded in the sealing groove.

[0049] A sealing cover 13 is provided on the lower base 9. The sealing cover 13 is located at the closing part of the lower base 9. The upper base 8 and the lower base 9 are sealed together by an airtight weld.

[0050] The upper base 8 is provided with four threaded through holes along the axial direction, and the spacing between any two adjacent threaded through holes is the same.

[0051] The upper base 8 is provided with a hydrogen charging pipe 14, one end of which extends into the steam end cover 3, and the other end of which extends into the excitation end cover 5.

[0052] The hydrogen charging pipe 14 is arranged axially along the top of the upper base 8.

[0053] More preferably, both the upper base 8 and the lower base 9 are provided with C-shaped sealing grooves 15 at their ends, and sealing strips 16 are embedded in the C-shaped sealing grooves 15.

[0054] One end of the intermediate stator frame 4 is sealed to the steam end cover 3, and the other end of the intermediate stator frame 4 is sealed to the excitation end cover 5.

[0055] This embodiment is the best implementation method. One end of the middle stator frame 4 is sealed to the steam end cover 3, and the other end of the middle stator frame 4 is sealed to the excitation end cover 5. By constructing a two-stage cooperative sealing interface between the segmented frames, the dynamic leakage rate of high-pressure hydrogen under axial thermal deformation conditions is effectively reduced, ensuring the sealing effect.

[0056] This design ensures the rigidity, strength, and sealing of the frame, while also improving the feasibility of transporting the stator frame for ultra-large hydrogen-cooled generators. This invention relates to a docking-type three-section split stator frame, which divides the generator frame into a steam end cover 3, an exciter end cover 5, and a mid-section stator frame 4. This design meets the stator transportation requirements of large-scale generators. The mid-section stator frame 4 is split into upper and lower halves, facilitating the assembly of the external stator at the power plant. The steam end cover 3 and the exciter end cover 5 retain their integral structure, preventing misalignment of the rear end face due to deformation of the mid-section stator and preventing axial deformation of the frame from causing axial deformation of the sealing seat. The airtightness of the generator frame is ensured by the double-layer sealing structure of the upper and lower frames 9 of the mid-section stator frame 4, as well as the double-layer sealing structure of the steam end cover 3, the exciter end cover 5, and the combined stator frame.

[0057] The cooling airflow of the multi-stage stator frame is as follows: Hydrogen is driven by axial fans installed at both ends of the rotor to cool the generator in three stages. First, cold air is blown into the cooling hood ventilation duct of the frame by the fans. The hydrogen in the cooling hood enters the back of the iron core, cools the inlet area of ​​the iron core along the radial airflow duct, and then enters the air gap. A small portion of the hydrogen enters the airflow duct within the rotor slots to cool the rotor windings. The majority of the hydrogen then returns to the iron core to cool the outlet area, and finally enters the cooler through the frame's hot air duct. Second, cold air is blown into the air gap by the fans to cool the stator end iron core. After cooling the rotor end coils, the cold air enters the air gap, cools the end iron core, and then enters the hot air duct before entering the cooler. The hydrogen cooled by the cooler is recirculated before entering the fan. This alternating radial multi-flow ventilation ensures uniform cooling of the generator core and windings, reducing thermal stress on structural components and localized overheating.

Claims

1. A three-section split stator frame for a multi-zone high-pressure hydrogen-cooled generator, comprising a frame body (1) and a straight ventilation pipe (2), characterized in that: The base body (1) is a split structure. The base body (1) includes a steam end cover (3), a middle stator base (4) and an exciter end cover (5). The middle stator base (4) is located between the steam end cover (3) and the exciter end cover (5). The middle stator base (4) is fixedly connected to the steam end cover (3) and the exciter end cover (5) respectively. The middle stator base (4) has multiple hot air chambers (6) and cold air chambers (7). The hot air chambers (6) and cold air chambers (7) are arranged at intervals. Any two adjacent hot air chambers (6) are connected through a straight ventilation pipe (2). The middle stator base (4) includes an upper base (8) and a lower base (9). The upper base (8) and the lower base (9) are fixedly connected. A small wind cover (10) is fixed on the lower base (9).

2. The multi-zone high-pressure hydrogen-cooled generator docking type three-section split stator frame according to claim 1, characterized in that: There are two small wind shields (10), one of which is located on one side of the bottom of the lower base (9), and the other is located on the other side of the bottom of the lower base (9).

3. The multi-zone high-pressure hydrogen-cooled generator docking type three-section split stator frame according to claim 1, characterized in that: A reinforcing clamping plate (11) and a clamping bolt (12) are provided between the upper base (8) and the lower base (9), and the upper base (8) and the lower base (9) are connected by the reinforcing clamping plate (11).

4. The multi-zone high-pressure hydrogen-cooled generator docking type three-section split stator frame according to claim 1, characterized in that: A sealing groove is provided on the lower base (9), the sealing groove is located at the joint of the lower base (9), and a rubber round strip is embedded in the sealing groove.

5. The multi-zone high-pressure hydrogen-cooled generator docking type three-section split stator frame according to claim 1, characterized in that: A sealing cover (13) is provided on the lower base (9). The sealing cover (13) is located at the closing point of the lower base (9). The upper base (8) and the lower base (9) are connected by an airtight weld.

6. The multi-zone high-pressure hydrogen-cooled generator docking type three-section split stator frame according to claim 1, characterized in that: The upper base (8) is provided with four threaded through holes along the axial direction, and the spacing between any two adjacent threaded through holes is the same.

7. The multi-zone high-pressure hydrogen-cooled generator docking type three-section split stator frame according to claim 1, characterized in that: The upper base (8) is provided with a hydrogen charging pipe (14), one end of which extends into the steam end cover (3) and the other end of which extends into the excitation end cover (5).

8. The multi-zone high-pressure hydrogen-cooled generator docking type three-section split stator frame according to claim 7, characterized in that: The hydrogen charging tube (14) is arranged axially along the top of the upper base (8).

9. The multi-zone high-pressure hydrogen-cooled generator docking type three-section split stator frame according to claim 1, characterized in that: Both the upper base (8) and the lower base (9) are provided with C-shaped sealing grooves (15) at their ends, and sealing strips (16) are embedded in the C-shaped sealing grooves (15).

10. The multi-zone high-pressure hydrogen-cooled generator docking type three-section split stator frame according to claim 1, characterized in that: One end of the middle stator frame (4) is sealed to the steam end cover (3), and the other end of the middle stator frame (4) is sealed to the excitation end cover (5).

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