Half-split base of high-pressure hydrogen-cooled generator

Abstract

The invention discloses a split base of a high-pressure hydrogen-cooled generator, which belongs to the technical field of steam turbine generator manufacturing and comprises a stator base, a steam end cover and an excitation end cover, coolers are arranged in the steam end cover and the excitation end cover, and the stator base is of a split structure and comprises a first base and a second base. A horizontal sealing groove is formed in the second machine base, a horizontal joint closing rubber strip is embedded in the horizontal sealing groove, the first machine base and the second machine base are connected in a sealed mode through the horizontal joint closing rubber strip, end cover sealing grooves are formed in the steam end cover and the excitation end cover, end cover sealing rubber strips are embedded in the end cover sealing grooves, and the end cover sealing rubber strips make contact with the horizontal joint closing rubber strip. One end of the stator base is in sealing connection with the steam end cover, and the other end is in sealing connection with the excitation end cover. The horizontal joint sealing rubber strip and the end cover sealing rubber strip make contact to form a continuous sealing chain, a tight sealing barrier is constructed, it can be ensured that the good sealing effect is achieved in the hydrogen cooling environment, and the sealing structure is suitable for a large steam turbine generator and convenient to transport.

Description

Technical Field

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

[0002] The stator frame of a steam turbine generator is a shell structure welded from steel plates, possessing sufficient strength and rigidity. The function of the stator frame is to support the stator core and stator coils, and to form specific cooling gas flow channels.

[0003] For hydrogen-cooled generators, the frame, as a sealed container for hydrogen, can withstand the impact of an accidental hydrogen explosion inside the generator. Existing hydrogen-cooled generators mainly adopt an integral welded steel plate structure.

[0004] Chinese patent document CN104362789A, published on February 18, 2015, discloses a 660MW generator stator frame, characterized by: the main structure of the frame being a cylindrical structure with a diameter of 3800mm, with cylindrical structures of 3800mm diameter at both ends; an upper U-shaped groove covering the main structure of the frame, with both ends of the upper U-shaped groove communicating with the cooler connection seat; both ends of the lower U-shaped groove communicating with the terminal box connection seat; the upper U-shaped groove and the upper recessed notch of the frame ring plate forming a hot air axial ventilation channel; the lower U-shaped groove and the lower recessed notch of the frame ring plate forming a cold air axial ventilation channel; the maximum width of the foot section is 4000mm, the foot rib plate is a trapezoidal shape that tapers inward at the top, and the corner width of the hanging seat is 3800mm.

[0005] The 660MW generator stator frame disclosed in this patent document makes full use of existing equipment and tooling fixtures, simplifying the process steps, shortening manufacturing time, and reducing manufacturing costs. However, the frame is a single unit, and its individual manufacturing cycle is long. It cannot be produced in parallel with the stator core, resulting in an excessively long generator production cycle and the problem of inconvenient transportation of large units. Summary of the Invention

[0006] To overcome the shortcomings of the prior art, this invention provides a split-type base for a high-pressure hydrogen-cooled generator. This invention forms a continuous sealing chain through the contact of a horizontal seam sealing strip and an end cover sealing strip, constructing a tight sealing barrier that ensures a good sealing effect in a hydrogen-cooled environment. It is suitable for large steam turbine generators and is easy to transport.

[0007] This invention is achieved through the following technical solution: A high-pressure hydrogen-cooled generator split-type frame includes a stator frame, characterized in that it further includes a steam end cover and an exciter end cover, with coolers installed inside the steam end cover and the exciter end cover. The stator frame is a split structure, comprising a first frame and a second frame. The second frame has a horizontal sealing groove, within which a horizontal joint seal strip is embedded. The first frame and the second frame are sealed together by the horizontal joint seal strip. Both the steam end cover and the exciter end cover have end cover sealing grooves, within which end cover sealing strips are embedded. The end cover sealing strips contact the horizontal joint seal strips. One end of the stator frame is sealed to the steam end cover, and the other end of the stator frame is sealed to the exciter end cover.

[0008] The horizontal joint sealing strip includes a horizontal joint section of the machine base and an arc transition section, which are integrally formed.

[0009] The arc transition section of the horizontal seam sealing strip comes into contact with the end cover sealing strip.

[0010] The first base is provided with a first assembly plate and a base assembly bolt, and the second base is provided with a second assembly plate. The first base and the second base are fixedly connected by the base assembly bolt.

[0011] An airtight cover is provided at the joint between the first base and the second base.

[0012] The steam end cover and excitation end cover are all provided with airtight welds at the joints with the stator frame.

[0013] The horizontal joint sealing strip has a rectangular or trapezoidal cross-sectional shape.

[0014] The cooler is detachably connected inside the steam end cover and the excitation end cover.

[0015] The horizontal seam sealing strip is made of nitrile rubber or fluororubber.

[0016] The depth of the horizontal sealing groove is less than the thickness of the horizontal joint sealing strip.

[0017] The depth of the end cover sealing groove is less than the thickness of the end cover sealing strip.

[0018] The basic principle of this invention is as follows: By designing the stator base as a double semi-cylindrical structure consisting of a first base and a second base, and embedding a horizontal joint seal strip at the horizontal joint to achieve a sealed connection; at the same time, end cover sealing grooves are opened on the mating surfaces of the steam end cover and the exciter end cover and end cover sealing strips are embedded, so that the end cover sealing strips are in close contact with the horizontal joint seal strips of the base, forming a continuous sealing chain that runs through the base and the end cover.

[0019] The entire structure meets the requirements for the separate transportation and assembly of large generator units. It utilizes a triple sealing interface, with horizontal seams, end cap mating, and rubber strip contact strip working together to effectively isolate the high-pressure hydrogen inside the generator and ensure zero leakage of the cooling medium. The integrated cooler of the steam end cap and excitation end cap enables hydrogen circulation cooling, ultimately ensuring the safe operation of the hydrogen cooling system under the separate modular architecture.

[0020] The beneficial effects of this invention are mainly reflected in the following aspects: 1. This invention includes coolers installed inside the steam-end and exciter-end covers. The stator frame is a split structure, comprising a first frame and a second frame. The second frame has a horizontal sealing groove, within which a horizontal joint seal strip is embedded. The first and second frames are sealed together by the horizontal joint seal strip. Both the steam-end and exciter-end covers have end-cover sealing grooves, within which end-cover sealing strips are embedded. The end-cover sealing strips contact the horizontal joint seal strips. One end of the stator frame is sealed to the steam-end cover, and the other end is sealed to the exciter-end cover. Compared to existing technologies, the contact between the horizontal joint seal strip and the end-cover sealing strip forms a continuous sealing chain, constructing a tight sealing barrier. This ensures a good sealing effect in a hydrogen-cooled environment, making it suitable for large steam turbine generators and facilitating transportation.

[0021] 2. The present invention provides a horizontal seam sealing strip comprising a horizontal seam section of the base and an arc transition section, wherein the horizontal seam section of the base and the arc transition section are integrally formed. The horizontal seam sealing strip adopts an integrally formed seamless connection of the horizontal seam section of the base and the arc transition section, which completely eliminates splicing gaps, achieves continuous and uniform sealing, significantly improves the reliability of hydrogen sealing and enhances the resistance to stress concentration.

[0022] 3. In this invention, a first mounting plate and a mounting bolt are provided on the first base, and a second mounting plate is provided on the second base. The first base and the second base are fixedly connected by the mounting bolt. The mounting plate bolt structure provides rigid constraint for the split base, ensuring a stable connection of the joint surface and creating uniform pressure conditions for the horizontal joint rubber strip, thereby fundamentally ensuring the reliability of hydrogen sealing.

[0023] 4. In this invention, an airtight cover is provided at the joint between the first base and the second base. The airtight cover covers the joint of the base to form a secondary sealing barrier, which further improves the sealing effect. 5. In this invention, airtight welds are provided at the joints between the steam end cover and the excitation end cover and the stator frame. The airtight welds form a rigid physical isolation layer at the joints between the end cover and the stator frame, completely blocking the hydrogen leakage path and providing the ultimate barrier protection for the sealing strip.

[0024] 6. The present invention adopts a split structure of a first frame and a second frame for the stator frame, which reduces the production cycle of the frame and greatly facilitates the production, installation, transportation and subsequent maintenance of large units, and solves the problems of long production cycle, transportation restrictions and heavy hoisting faced by ultra-large integral frames.

[0025] 7. In this invention, the steam end cover and the exciter end cover are independent components, and the cooler is integrated into the steam end cover and the exciter end cover, so that the maintenance of the cooling system can be carried out independently of the stator frame, significantly reducing maintenance complexity and downtime.

[0026] 8. In this invention, the first base and the second base are sealed together in a precision groove by a horizontal joint strip, which not only ensures the sealing performance, but also provides the necessary structural rigidity and fitting accuracy. Attached Figure Description

[0027] The present invention will now be further described in detail with reference to the accompanying drawings and specific embodiments: Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a partial schematic diagram of the stator frame; Figure 3 This is a schematic diagram showing the connection between the stator frame and the excitation end cover; Figure 4 This is a schematic diagram showing the sealing connection between the second base and the exciter end cover; The markings in the diagram are: 1. Stator frame, 2. Steam end cover, 3. Excitation end cover, 4. Cooler, 5. First frame, 6. Second frame, 7. Horizontal sealing groove, 8. Horizontal joint rubber strip, 9. End cover sealing groove, 10. End cover sealing rubber strip, 11. Horizontal joint section, 12. Arc transition section, 13. First assembly plate, 14. Frame assembly bolt, 15. Second assembly plate, 16. Airtight cover, 17. Airtight weld. Detailed Implementation

[0028] Example 1 See Figures 1-3A high-pressure hydrogen-cooled generator split-frame includes a stator frame 1, a steam end cover 2, and an exciter end cover 3. Coolers 4 are installed inside the steam end cover 2 and the exciter end cover 3. The stator frame 1 is a split structure, comprising a first frame 5 and a second frame 6. The second frame 6 has a horizontal sealing groove 7, within which a horizontal seam strip 8 is embedded. The first frame 5 and the second frame 6 are sealed together by the horizontal seam strip 8. Both the steam end cover 2 and the exciter end cover 3 have end cover sealing grooves 9, within which end cover sealing strips 10 are embedded. The end cover sealing strip 10 contacts the horizontal seam strip 8. One end of the stator frame 1 is sealed to the steam end cover 2, and the other end of the stator frame 1 is sealed to the exciter end cover 3.

[0029] This embodiment is the most basic implementation. Coolers 4 are installed inside the steam end cover 2 and the exciter end cover 3. The stator frame 1 is a split structure, including a first frame 5 and a second frame 6. A horizontal sealing groove 7 is opened on the second frame 6, and a horizontal joint rubber strip 8 is embedded in the horizontal sealing groove 7. The first frame 5 and the second frame 6 are sealed and connected by the horizontal joint rubber strip 8. Both the steam end cover 2 and the exciter end cover 3 have end cover sealing grooves 9, and end cover sealing rubber strips 10 are embedded in the end cover sealing grooves 9. The end cover sealing rubber strip 10 is in contact with the horizontal joint rubber strip 8. One end of the stator frame 1 is sealed and connected to the steam end cover 2, and the other end of the stator frame 1 is sealed and connected to the exciter end cover 3. Compared with the prior art, the horizontal joint rubber strip 8 and the end cover sealing rubber strip 10 form a continuous sealing chain through contact, constructing a tight sealing barrier, which can ensure a good sealing effect in a hydrogen cooling environment. It is suitable for large steam turbine generators and is easy to transport.

[0030] Example 2 See Figures 1-4 A high-pressure hydrogen-cooled generator split-frame includes a stator frame 1, a steam end cover 2, and an exciter end cover 3. Coolers 4 are installed inside the steam end cover 2 and the exciter end cover 3. The stator frame 1 is a split structure, comprising a first frame 5 and a second frame 6. The second frame 6 has a horizontal sealing groove 7, within which a horizontal seam strip 8 is embedded. The first frame 5 and the second frame 6 are sealed together by the horizontal seam strip 8. Both the steam end cover 2 and the exciter end cover 3 have end cover sealing grooves 9, within which end cover sealing strips 10 are embedded. The end cover sealing strip 10 contacts the horizontal seam strip 8. One end of the stator frame 1 is sealed to the steam end cover 2, and the other end of the stator frame 1 is sealed to the exciter end cover 3.

[0031] Preferably, the horizontal joint strip 8 includes a horizontal joint section 11 of the machine base and an arc transition section 12, which are integrally formed.

[0032] This embodiment is a preferred implementation. The horizontal joint sealing strip 8 includes a base horizontal joint section 11 and an arc transition section 12. The base horizontal joint section 11 and the arc transition section 12 are integrally formed. The horizontal joint sealing strip 8 adopts an integrally formed seamless connection of the base horizontal joint section 11 and the arc transition section 12, which completely eliminates splicing gaps, achieves continuous and uniform sealing, significantly improves the reliability of hydrogen sealing and enhances the resistance to stress concentration.

[0033] Example 3 See Figures 1-4 A high-pressure hydrogen-cooled generator split-frame includes a stator frame 1, a steam end cover 2, and an exciter end cover 3. Coolers 4 are installed inside the steam end cover 2 and the exciter end cover 3. The stator frame 1 is a split structure, comprising a first frame 5 and a second frame 6. The second frame 6 has a horizontal sealing groove 7, within which a horizontal seam strip 8 is embedded. The first frame 5 and the second frame 6 are sealed together by the horizontal seam strip 8. Both the steam end cover 2 and the exciter end cover 3 have end cover sealing grooves 9, within which end cover sealing strips 10 are embedded. The end cover sealing strip 10 contacts the horizontal seam strip 8. One end of the stator frame 1 is sealed to the steam end cover 2, and the other end of the stator frame 1 is sealed to the exciter end cover 3.

[0034] The horizontal joint sealing strip 8 includes a horizontal joint section 11 of the machine base and an arc transition section 12, which are integrally formed.

[0035] The arc transition section 12 of the horizontal seam sealing strip 8 comes into contact with the end cover sealing strip 10.

[0036] The first base 5 is provided with a first assembly plate 13 and a base assembly bolt 14, and the second base 6 is provided with a second assembly plate 15. The first base 5 and the second base 6 are fixedly connected by the base assembly bolt 14.

[0037] This embodiment is another preferred implementation. The first base 5 is provided with a first connecting plate 13 and a base connecting bolt 14, and the second base 6 is provided with a second connecting plate 15. The first base 5 and the second base 6 are fixedly connected by the base connecting bolt 14. The connecting plate bolt structure provides rigid constraint for the split base, ensuring a stable connection of the joint surface and creating uniform pressure conditions for the horizontal joint rubber strip 8, fundamentally ensuring the reliability of hydrogen sealing.

[0038] Example 4 See Figures 1-4A high-pressure hydrogen-cooled generator split-frame includes a stator frame 1, a steam end cover 2, and an exciter end cover 3. Coolers 4 are installed inside the steam end cover 2 and the exciter end cover 3. The stator frame 1 is a split structure, comprising a first frame 5 and a second frame 6. The second frame 6 has a horizontal sealing groove 7, within which a horizontal seam strip 8 is embedded. The first frame 5 and the second frame 6 are sealed together by the horizontal seam strip 8. Both the steam end cover 2 and the exciter end cover 3 have end cover sealing grooves 9, within which end cover sealing strips 10 are embedded. The end cover sealing strip 10 contacts the horizontal seam strip 8. One end of the stator frame 1 is sealed to the steam end cover 2, and the other end of the stator frame 1 is sealed to the exciter end cover 3.

[0039] The horizontal joint sealing strip 8 includes a horizontal joint section 11 of the machine base and an arc transition section 12, which are integrally formed.

[0040] The arc transition section 12 of the horizontal seam sealing strip 8 comes into contact with the end cover sealing strip 10.

[0041] More preferably, the first base 5 is provided with a first assembly plate 13 and a base assembly bolt 14, and the second base 6 is provided with a second assembly plate 15. The first base 5 and the second base 6 are fixedly connected by the base assembly bolt 14.

[0042] An airtight cover 16 is provided at the joint between the first base 5 and the second base 6.

[0043] This embodiment is another preferred implementation. An airtight cover 16 is provided at the joint between the first base 5 and the second base 6. The airtight cover 16 covers the joint of the base to form a secondary sealing barrier, which further improves the sealing effect. Example 5 See Figures 1-4 A high-pressure hydrogen-cooled generator split-frame includes a stator frame 1, a steam end cover 2, and an exciter end cover 3. Coolers 4 are installed inside the steam end cover 2 and the exciter end cover 3. The stator frame 1 is a split structure, comprising a first frame 5 and a second frame 6. The second frame 6 has a horizontal sealing groove 7, within which a horizontal seam strip 8 is embedded. The first frame 5 and the second frame 6 are sealed together by the horizontal seam strip 8. Both the steam end cover 2 and the exciter end cover 3 have end cover sealing grooves 9, within which end cover sealing strips 10 are embedded. The end cover sealing strip 10 contacts the horizontal seam strip 8. One end of the stator frame 1 is sealed to the steam end cover 2, and the other end of the stator frame 1 is sealed to the exciter end cover 3.

[0044] The horizontal joint sealing strip 8 includes a horizontal joint section 11 of the machine base and an arc transition section 12, which are integrally formed.

[0045] The arc transition section 12 of the horizontal seam sealing strip 8 comes into contact with the end cover sealing strip 10.

[0046] The first base 5 is provided with a first assembly plate 13 and a base assembly bolt 14, and the second base 6 is provided with a second assembly plate 15. The first base 5 and the second base 6 are fixedly connected by the base assembly bolt 14.

[0047] An airtight cover 16 is provided at the joint between the first base 5 and the second base 6.

[0048] The steam end cover 2 and the excitation end cover 3 are both provided with airtight welds 17 at the joints with the stator frame 1.

[0049] This embodiment is another preferred implementation. Airtight welds 17 are provided at the joints between the steam end cover 2 and the excitation end cover 3 and the stator frame 1. The airtight welds 17 form a rigid physical isolation layer at the joints between the end cover and the stator frame 1, completely blocking the hydrogen leakage path and providing the ultimate barrier protection for the sealing strip.

[0050] Example 6 See Figures 1-4 A high-pressure hydrogen-cooled generator split-frame includes a stator frame 1, a steam end cover 2, and an exciter end cover 3. Coolers 4 are installed inside the steam end cover 2 and the exciter end cover 3. The stator frame 1 is a split structure, comprising a first frame 5 and a second frame 6. The second frame 6 has a horizontal sealing groove 7, within which a horizontal seam strip 8 is embedded. The first frame 5 and the second frame 6 are sealed together by the horizontal seam strip 8. Both the steam end cover 2 and the exciter end cover 3 have end cover sealing grooves 9, within which end cover sealing strips 10 are embedded. The end cover sealing strip 10 contacts the horizontal seam strip 8. One end of the stator frame 1 is sealed to the steam end cover 2, and the other end of the stator frame 1 is sealed to the exciter end cover 3.

[0051] The horizontal joint sealing strip 8 includes a horizontal joint section 11 of the machine base and an arc transition section 12, which are integrally formed.

[0052] The arc transition section 12 of the horizontal seam sealing strip 8 comes into contact with the end cover sealing strip 10.

[0053] The first base 5 is provided with a first assembly plate 13 and a base assembly bolt 14, and the second base 6 is provided with a second assembly plate 15. The first base 5 and the second base 6 are fixedly connected by the base assembly bolt 14.

[0054] An airtight cover 16 is provided at the joint between the first base 5 and the second base 6.

[0055] More preferably, the steam end cover 2 and the excitation end cover 3 are provided with airtight welds 17 at the joints with the stator frame 1.

[0056] The horizontal seam sealing strip 8 has a rectangular cross-sectional shape.

[0057] The cooler 4 is detachably connected inside the steam end cover 2 and the excitation end cover 3.

[0058] The horizontal seam strip 8 is made of nitrile rubber.

[0059] This embodiment is another preferred implementation. The stator frame 1 adopts a split structure of the first frame 5 and the second frame 6, which reduces the production cycle of the frame and greatly facilitates the production, installation, transportation and subsequent maintenance of large units. It solves the problems of long production cycle, transportation restrictions and heavy hoisting faced by ultra-large integral frames. Example 7 See Figures 1-4 A high-pressure hydrogen-cooled generator split-frame includes a stator frame 1, a steam end cover 2, and an exciter end cover 3. Coolers 4 are installed inside the steam end cover 2 and the exciter end cover 3. The stator frame 1 is a split structure, comprising a first frame 5 and a second frame 6. The second frame 6 has a horizontal sealing groove 7, within which a horizontal seam strip 8 is embedded. The first frame 5 and the second frame 6 are sealed together by the horizontal seam strip 8. Both the steam end cover 2 and the exciter end cover 3 have end cover sealing grooves 9, within which end cover sealing strips 10 are embedded. The end cover sealing strip 10 contacts the horizontal seam strip 8. One end of the stator frame 1 is sealed to the steam end cover 2, and the other end of the stator frame 1 is sealed to the exciter end cover 3.

[0060] The horizontal joint sealing strip 8 includes a horizontal joint section 11 of the machine base and an arc transition section 12, which are integrally formed.

[0061] The arc transition section 12 of the horizontal seam sealing strip 8 comes into contact with the end cover sealing strip 10.

[0062] The first base 5 is provided with a first assembly plate 13 and a base assembly bolt 14, and the second base 6 is provided with a second assembly plate 15. The first base 5 and the second base 6 are fixedly connected by the base assembly bolt 14.

[0063] An airtight cover 16 is provided at the joint between the first base 5 and the second base 6.

[0064] The steam end cover 2 and the excitation end cover 3 are both provided with airtight welds 17 at the joints with the stator frame 1.

[0065] The horizontal seam sealing strip 8 has a trapezoidal cross-sectional shape.

[0066] The cooler 4 is detachably connected inside the steam end cover 2 and the excitation end cover 3.

[0067] The horizontal joint sealing strip 8 is made of fluororubber.

[0068] The depth of the horizontal sealing groove 7 is less than the thickness of the horizontal joint sealing strip 8.

[0069] The depth of the end cover sealing groove 9 is less than the thickness of the end cover sealing strip 10.

[0070] This embodiment is the best implementation method. The steam end cover 2 and the exciter end cover 3 are independent components, and the cooler 4 is integrated into the steam end cover 2 and the exciter end cover 3. This allows the maintenance of the cooling system to be carried out independently of the stator frame 1, which significantly reduces maintenance complexity and downtime.

[0071] The first base 5 and the second base 6 are sealed together in a precision groove by a horizontal joint strip 8, which ensures both airtightness and provides the necessary structural rigidity and fitting accuracy.

[0072] The basic principle of this invention is as follows: By designing the stator base 1 as a double semi-cylindrical structure consisting of a first base 5 and a second base 6, and embedding a horizontal joint seal strip 8 at the horizontal joint to achieve a sealed connection; at the same time, an end cover sealing groove 9 is opened on the mating surface of the steam end cover 2 and the exciter end cover 3 and an end cover sealing strip 10 is embedded therein, so that the end cover sealing strip 10 is in close contact with the base horizontal joint seal strip 8, forming a continuous sealing chain that runs through the base and the end cover.

[0073] While meeting the needs of large-scale unit modular transportation and assembly, the entire structure utilizes a triple sealing interface, with horizontal seams, end cap docking, and rubber strip contact strip working together to effectively isolate high-pressure hydrogen inside the generator and ensure zero leakage of the cooling medium; the cooler 4 integrated into the steam end cap 2 realizes hydrogen circulation cooling, and ultimately ensures the safe operation of the hydrogen cooling system under the modular architecture.

[0074] Based on research experiments and actual product airtightness tests, the following method of matching the rubber strips yields the best sealing effect.

[0075] The first frame 5 and the second frame 6 are sealed together by a horizontal joint sealant strip 8. The cross-sectional shape of the horizontal joint sealant strip 8 is rectangular or trapezoidal. Specifically, a square sealing strip is used to seal the contact between the first frame 5 and the second frame 6, which can ensure the sealing performance of the entire stator frame 1 after the end cover is assembled. The compression of the horizontal joint sealing strip 8 and the end cover sealing strip 10 is 3-5mm, which can improve the tolerance of the assembly gap between the split half surface of the stator frame 1 and the mating surface between the stator frame 1 and the end cover, and ensure sealing performance. The horizontal joint sealing strip 8 is integrally formed from the horizontal joint section 11 of the machine base and the arc transition section 12. See [reference needed]. Figure 4 The fit between the horizontal joint seal strip 8 and the end cover sealing strip 10 can be adjusted by controlling the height of the arc transition section 12 protruding from the end face of the stator base 1. Tests have shown that the sealing effect between the horizontal joint seal strip 8 and the end cover sealing strip 10 is best when the height of the arc transition section 12 protruding from the end face of the stator base 1 is 0.1-1.5mm.

Claims

1. A high-pressure hydrogen-cooled generator split-frame, comprising a stator frame (1), characterized in that: It also includes a steam end cover (2) and an exciter end cover (3), and a cooler (4) is provided inside the steam end cover (2) and the exciter end cover (3). The stator frame (1) is a split structure. The stator frame (1) includes a first frame (5) and a second frame (6). A horizontal sealing groove (7) is opened on the second frame (6). A horizontal joint rubber strip (8) is embedded in the horizontal sealing groove (7). The first frame (5) and the second frame (6) are sealed and connected by the horizontal joint rubber strip (8). An end cover sealing groove (9) is opened on both the steam end cover (2) and the exciter end cover (3). An end cover sealing rubber strip (10) is embedded in the end cover sealing groove (9). The end cover sealing rubber strip (10) is in contact with the horizontal joint rubber strip (8). One end of the stator frame (1) is sealed and connected to the steam end cover (2), and the other end of the stator frame (1) is sealed and connected to the exciter end cover (3).

2. The high-pressure hydrogen-cooled generator split-frame according to claim 1, characterized in that: The horizontal joint strip (8) includes a horizontal joint section (11) of the machine base and an arc transition section (12), which are integrally formed.

3. The high-pressure hydrogen-cooled generator split-frame according to claim 2, characterized in that: The arc transition section (12) of the horizontal seam sealing strip (8) is in contact with the end cover sealing strip (10).

4. The high-pressure hydrogen-cooled generator split-frame according to claim 1, characterized in that: The first base (5) is provided with a first assembly plate (13) and a base assembly bolt (14), and the second base (6) is provided with a second assembly plate (15). The first base (5) and the second base (6) are fixedly connected by the base assembly bolt (14).

5. A split-frame for a high-pressure hydrogen-cooled generator according to claim 1, characterized in that: An airtight cover (16) is provided at the joint between the first base (5) and the second base (6).

6. The high-pressure hydrogen-cooled generator split-frame according to claim 1, characterized in that: The steam end cover (2) and excitation end cover (3) are provided with airtight welds (17) at the joints with the stator frame (1).

7. The high-pressure hydrogen-cooled generator split-frame according to claim 1, characterized in that: The horizontal seam sealing strip (8) has a rectangular or trapezoidal cross-sectional shape.

8. The high-pressure hydrogen-cooled generator split-frame according to claim 1, characterized in that: The cooler (4) is detachably connected inside the steam end cover (2) and the excitation end cover (3).

9. A split-frame for a high-pressure hydrogen-cooled generator according to claim 1, characterized in that: The horizontal seam sealing strip (8) is made of nitrile rubber or fluororubber.

10. A split-frame for a high-pressure hydrogen-cooled generator according to claim 1, characterized in that: The depth of the horizontal sealing groove (7) is less than the thickness of the horizontal joint sealing strip (8).

11. A split-frame for a high-pressure hydrogen-cooled generator according to claim 1, characterized in that: The depth of the end cover sealing groove (9) is less than the thickness of the end cover sealing strip (10).

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