A processing device and method for a pumped storage power station generator integrated yoke

Abstract

The application discloses a kind of pumped storage power station generator integrated yoke processing equipment and processing method, it is related to yoke processing equipment field, including integrated yoke, outer circle groove processing equipment, inner circle groove processing equipment, numerical control rotary table, annular track assembly and slewing car.The method includes inner wall surface processing procedure, tool setting procedure and outer wall surface processing procedure.The beneficial effects of the present application are: the yoke workpiece of several tens of tons to several hundred tons in weight can be directly processed on the installation site, the high-precision numerical control rotary table is used to automatically control the indexing and rotation of the inner circle groove processing equipment, ensuring the processing accuracy;the outer circle groove processing equipment and the inner circle groove processing equipment automatically control the feeding direction of the outer milling cutter head and the inner milling cutter head, and automatically perform milling processing.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of magnetic yoke processing equipment, and particularly relates to a pumping storage power station generator integrated magnetic yoke processing equipment and a processing method. BACKGROUND

[0002] The integrated magnetic yoke is applied more and more widely in the pumping storage power station generator, but the integrated magnetic yoke has the characteristics of large mass (usually dozens of tons or even hundreds of tons), high processing precision (the inner cavity has a uniform longitudinal groove group to be processed, and the outer circle has a uniform plane and groove group to be processed), and large material strength. In order to meet the rapid development of the pumping storage power station, and at the same time adapt to the rapid and efficient processing demand of the integrated magnetic yoke, it is necessary to provide a pumping storage power station generator integrated magnetic yoke processing equipment and a processing method. SUMMARY

[0003] The present application aims at overcoming the deficiencies in the prior art, and providing a pumping storage power station generator integrated magnetic yoke processing equipment and a processing method, which can directly process the magnetic yoke workpiece on the installation site without the need for further transportation.

[0004] The purpose of the present application is achieved by the following technical scheme: a pumping storage power station generator integrated magnetic yoke processing equipment, comprising

[0005] The integrated magnetic yoke is a cylindrical structure, and the inner wall of the cylindrical structure is a circumferential surface, and the cross section of the outer wall is a regular polygon, and the bottom of the integrated magnetic yoke is supported on the ground by a support seat;

[0006] The outer circular groove processing equipment is arranged on the outer periphery of the integrated magnetic yoke, and is used for processing the outer wall surface of the integrated magnetic yoke;

[0007] The inner circular groove processing equipment is coaxially arranged in the inner cavity of the integrated magnetic yoke, and is used for processing the inner wall surface of the integrated magnetic yoke;

[0008] The numerical control rotary table is arranged at the bottom of the inner circular groove processing equipment, and is used for supporting and driving the inner circular groove processing equipment to rotate around the axis of the integrated magnetic yoke;

[0009] The annular track assembly is arranged on the ground and coaxially arranged with the integrated magnetic yoke; and

[0010] The rotary trolley is installed on the track assembly and moves along the circumference of the track assembly, and the outer circular groove processing equipment is supported on the rotary trolley, and the rotary trolley drives the outer circular groove processing equipment to move around the outer periphery of the integrated magnetic yoke.

[0011] As a further technical scheme, the inner groove machining equipment comprises a center column supported on a numerical control rotary table in a vertical direction, a pressing support and a rotary shaft are arranged on the top of the center column, the rotary shaft is supported on the center of the pressing support through a bearing assembly, and the pressing support presses the top of the integral magnetic yoke; a Y-axis sliding table A is arranged on the center column in a vertical direction and is used for mounting an inner milling unit.

[0012] As a further technical scheme, the center column is provided with a Y-axis lead screw A and a Y-axis guide rail A in a vertical direction, the Y-axis lead screw A drives the Y-axis sliding table A to move up and down along the Y-axis guide rail A, and the Y-axis lead screw A is driven by a Y-axis motor A fixed on the center column.

[0013] As a further technical scheme, the inner milling unit comprises an X-axis sliding table A, a Z-axis sliding table A and an inner milling cutter head, the Y-axis sliding table A is provided with an X-axis guide rail A and an X-axis lead screw A, an X-axis motor A drives the X-axis lead screw A to rotate, thereby driving the X-axis sliding table A to slide along the length direction of the X-axis guide rail A; the X-axis sliding table A is provided with a Z-axis guide rail A and a Z-axis lead screw A, a Z-axis motor A drives the Z-axis lead screw A to rotate, thereby driving the Z-axis sliding table A to slide along the length direction of the Z-axis guide rail A, and the length direction of the X-axis guide rail A is perpendicular to the length direction of the Z-axis guide rail A; the Z-axis guide rail A is provided with an inner milling motor for driving the inner milling cutter head.

[0014] As a further technical scheme, the track assembly comprises an inner ring annular track and an outer ring annular track, and the outer ring annular track is arranged on the outer periphery of the inner ring annular track; the rotating trolley is provided with a trolley driving motor for driving a main transmission gear, the main transmission gear is in external tooth meshing transmission with the inner ring annular track, the trolley driving motor drives the rotating trolley to move around the circumference of the inner ring annular track, and the bottom of the rotating trolley is supported and guided by the outer ring annular track.

[0015] As a further technical scheme, the outer groove machining equipment comprises a base and a column supported on the base in a vertical direction, the top of the column is provided with a Y-axis motor B, the column is provided with a Y-axis sliding table B in a vertical direction and is used for mounting an outer milling unit; the top of the Y-axis sliding table B is connected with one end of a traction steel wire rope, and the other end of the traction steel wire rope is connected with a counterweight arranged in the column.

[0016] As a further technical scheme, the column is provided with a Y-axis lead screw B and a Y-axis guide rail B in a vertical direction, the Y-axis lead screw B drives the Y-axis sliding table B to move up and down along the Y-axis guide rail B, and the Y-axis lead screw B is driven to rotate by the Y-axis motor B.

[0017] As a further technical solution, the outer milling unit comprises an X-axis sliding table B, a Z-axis sliding table B and an outer milling cutter head, the Y-axis sliding table B is provided with an X-axis guide rail B and an X-axis screw B, an X-axis motor B drives the X-axis screw B to rotate, thereby driving the X-axis sliding table B to slide along the length direction of the X-axis guide rail B; the X-axis sliding table B is provided with a Z-axis guide rail B and a Z-axis screw B, a Z-axis motor B drives the Z-axis screw B to rotate, thereby driving the Z-axis sliding table B to slide along the length direction of the Z-axis guide rail B, and the length direction of the X-axis guide rail B and the length direction of the Z-axis guide rail B are perpendicular to each other; the Z-axis guide rail B is provided with an outer milling motor for driving the outer milling cutter head.

[0018] A processing method of a whole yoke of a pumped storage power station generator, comprising the following steps:

[0019] S1: inner wall surface processing, starting the inner circular groove processing equipment, evenly processing a plurality of rectangular grooves along the inner wall surface of the whole yoke, specifically comprising the following steps:

[0020] S1.1: starting the inner milling motor, driving the Z-axis sliding table A to slide along the Z-axis guide rail A by the Z-axis motor A to set the milling amount of the inner milling cutter head in the Z-axis direction, that is, the depth direction of the rectangular groove;

[0021] S1.2: starting the Y-axis motor A, driving the Y-axis sliding table A to slide downward along the vertical direction, that is, the length direction of the rectangular groove to the bottom of the whole yoke, so that the inner milling cutter head mills a groove surface from top to bottom; then, driving the X-axis sliding table A to slide along the X-axis guide rail A by the X-axis motor A to set the milling amount of the inner milling cutter head in the X-axis direction, that is, the width direction of the rectangular groove;

[0022] S1.3: starting the Y-axis motor A again, driving the Y-axis sliding table A to slide upward along the vertical direction to the top of the whole yoke, so that the inner milling cutter head mills from bottom to top; driving the X-axis sliding table A by the X-axis motor A to continue adjusting the milling amount of the inner milling cutter head in the X-axis direction;

[0023] S1.4: repeating steps S1.2 and S1.3 until one rectangular groove is processed, driving the inner circular groove processing equipment to rotate around the inner wall surface of the whole yoke to the processing position of the next rectangular groove by the numerical control turntable, and the numerical control turntable controls the central angle between adjacent rectangular grooves according to the number of rectangular grooves to be processed;

[0024] S1.5: repeating steps S1.1 to S1.4 until each rectangular groove is processed;

[0025] S2: tool setting: taking the finished rectangular groove as a reference, the inner milling cutter head is adjusted to the center position of each rectangular groove in turn, the angle between the planes where the outer milling cutter head and the inner milling cutter head are located is adjusted by using the numerical control rotary table and the rotary trolley, and two adjacent machining stations are set on the outer wall surface of the integral magnetic yoke for each rectangular groove;

[0026] S3: outer wall surface machining, starting the outer circular groove machining device, machining a plurality of T-shaped grooves along the machining stations on the outer wall surface of the integral magnetic yoke, specifically including the following steps:

[0027] S3.1: start the outer milling motor, set the milling amount of the outer milling cutter head in the Z-axis direction, i.e. the depth direction of the T-shaped groove, by driving the Z-axis sliding table B along the Z-axis guide rail B through the Z-axis motor B;

[0028] S3.2: start the Y-axis motor B, drive the Y-axis sliding table B to slide downward along the vertical direction, i.e. the length direction of the T-shaped groove, to the bottom of the integral magnetic yoke, so that the outer milling cutter head mills a groove surface from top to bottom; then, set the milling amount of the outer milling cutter head in the X-axis direction, i.e. the width direction of the T-shaped groove, by driving the X-axis sliding table B along the X-axis guide rail B through the X-axis motor B;

[0029] S3.3: start the Y-axis motor B again, drive the Y-axis sliding table B to slide upward along the vertical direction to the top of the integral magnetic yoke, so that the outer milling cutter head mills from bottom to top; continue to adjust the milling amount of the outer milling cutter head in the X-axis direction by driving the X-axis sliding table B through the X-axis motor B;

[0030] S3.4: repeat steps S3.2 and S3.3 until five adjacent T-shaped grooves are machined in the same machining station, rotate the outer circular groove machining device around the outer wall surface of the integral magnetic yoke to the machining station of the next T-shaped groove through the rotary trolley;

[0031] S3.5: repeat steps S3.1 to S3.4 until each T-shaped groove is machined.

[0032] As a further technical solution, the number of rectangular grooves is 6 or 7, and the width of the rectangular groove is ≤260mm; the number of T-shaped grooves is 60 or 70; the inner diameter of the integral magnetic yoke is φ2200-φ3200mm, the outer wall section of the integral magnetic yoke is a regular polygon and is a regular dodecagon or a regular tetradecagon, the inscribed circle diameter of the regular polygon is φ3800-φ4700mm, and the side length of the regular polygon is ≤720mm; the height of the integral magnetic yoke is 3000-4000mm, and the weight of the integral magnetic yoke is ≤220 tons; the maximum depth of cut of the outer milling cutter head and the inner milling cutter head is ≥2.0mm.

[0033] The beneficial effect of the present application is that the magnetic yoke workpiece with weight of tens of tons to hundreds of tons can be directly processed at the installation site, the high-precision numerical control rotary table is adopted to automatically control the indexing and rotation of the inner circular groove processing equipment, the machining precision is ensured, the feeding direction of the outer milling cutter head and the inner milling cutter head of the outer circular groove processing equipment and the inner circular groove processing equipment is automatically controlled, and the milling processing is automatically performed. BRIEF DESCRIPTION OF DRAWINGS

[0034] Figure 1 The figure is a structural schematic diagram of the integral magnetic yoke after processing.

[0035] Figure 2 The figure is an assembly structural schematic diagram of the present application during processing.

[0036] Figure 3 The figure is a structural schematic diagram of the inner circular groove processing equipment in the present application Figure 1 .

[0037] Figure 4 The figure is a partial enlarged schematic diagram of the A area in the present application Figure 3 .

[0038] Figure 5 The figure is a structural schematic diagram of the inner circular groove processing equipment in the present application Figure 2 .

[0039] Figure 6 The figure is a structural schematic diagram of the outer circular groove processing equipment in the present application Figure 1 .

[0040] Figure 7 The figure is a partial enlarged schematic diagram of the BA area in the present application Figure 6 .

[0041] Figure 8 The figure is a structural schematic diagram of the outer circular groove processing equipment in the present application Figure 2 .

[0042] Explanation of reference numerals in the attached drawings: Integral magnetic yoke 100, support base 101, rectangular groove 102, T-groove 103, external circular groove machining equipment 200, base 201, column 202, Y-axis motor B203, Y-axis slide B204, traction steel wire rope 205, external milling unit 206, Y-axis lead screw B207, Y-axis guide rail B208, X-axis slide B209, Z-axis slide B210, external milling cutter head 211, X-axis guide rail B212, X-axis lead screw B213, X-axis motor B214, Z-axis guide rail B215, Z-axis lead screw B216, Z-axis motor B217, external milling motor 218, internal circular groove machining equipment 300, center column 301. 302, clamping bracket, 303, rotating shaft, 304, bearing assembly, A305, Y-axis slide, 306, internal milling unit, A307, Y-axis lead screw, A308, Y-axis guide rail, A309, X-axis slide, A310, Z-axis slide, A311, internal milling cutter head, 312, X-axis guide rail, A313, X-axis lead screw, A314, X-axis motor, A315, Z-axis guide rail, A316, Z-axis lead screw, A317, Z-axis motor, A318, internal milling motor, 319, CNC rotary table, 400, track assembly, 500, inner ring track, 501, outer ring track, 502, rotary trolley, 600, trolley drive motor, 601, main drive gear, 602. Detailed Implementation

[0043] The present invention will now be described in detail with reference to the accompanying drawings:

[0044] Example: As attached Figures 1 to 8 As shown, a processing equipment for an integral magnetic yoke of a pumped storage power station generator includes an integral magnetic yoke 100, an outer circular groove processing equipment 200, an inner circular groove processing equipment 300, a CNC turntable 400, a ring-shaped track assembly 500, and a rotary trolley 600. Figure 1 As shown, the integral magnetic yoke 100 has an approximately cylindrical structure, with the inner wall of the cylindrical structure being a circular surface and the outer wall having a regular polygonal cross-section (preferably a regular dodecagon or regular tetradecagon). (See attached diagram.) Figure 2 (For ease of demonstration, the internal groove machining equipment 300 is...) Figure 2The overall magnetic yoke 100 in the figure is provided with a gap, and the overall magnetic yoke 100 is actually still a cylindrical structure. The bottom of the overall magnetic yoke 100 is supported on the ground (preferably the inner side of the inner ring annular track 501) through a support base 101. An outer circular groove machining device 200 is arranged on the outer periphery of the overall magnetic yoke 100 and is used for machining the outer wall surface of the overall magnetic yoke 100. An inner circular groove machining device 300 is coaxially arranged in the inner cavity of the overall magnetic yoke 100 and is used for machining the inner wall surface of the overall magnetic yoke 100. A numerical control rotary table 400 is arranged at the bottom of the inner circular groove machining device 300 and is used for supporting and driving the inner circular groove machining device 300 to rotate around the axis of the overall magnetic yoke 100. An annular track assembly 500 is arranged on the ground and is coaxially arranged with the overall magnetic yoke 100. A rotary trolley 600 is mounted on the track assembly 500 and moves along the circumference of the track assembly 500. The outer circular groove machining device 200 is supported on the rotary trolley 600, and the rotary trolley 600 drives the outer circular groove machining device 200 to move around the outer periphery of the overall magnetic yoke 100.

[0045] Further, with reference to the accompanying drawings Figure 3 、 4 , 5, the inner circular groove machining device 300 comprises a central column 301 which is supported on the numerical control rotary table 400 in the vertical direction. A pressing support 302 and a rotary shaft 303 are arranged at the top of the central column 301. The rotary shaft 303 is supported in the center of the pressing support 302 through a bearing assembly 304, and the pressing support 302 presses the top of the overall magnetic yoke 100. A Y-axis sliding table A 305 is slidably arranged on the central column 301 in the vertical direction and is used for mounting an inner milling unit 306. A Y-axis lead screw A 307 and a Y-axis guide rail A 308 are arranged on the central column 301 in the vertical direction. The Y-axis sliding table A 305 is driven to move up and down along the Y-axis guide rail A 308 by the Y-axis lead screw A 307. The Y-axis lead screw A 307 is driven by a Y-axis motor A 309 fixed on the central column 301. The inner milling unit 306 comprises an X-axis sliding table A 310, a Z-axis sliding table A 311 and an inner milling cutter head 312. An X-axis guide rail A 313 and an X-axis lead screw A 314 are arranged on the Y-axis sliding table A 305. An X-axis motor A 315 drives the X-axis lead screw A 314 to rotate, thereby driving the X-axis sliding table A 310 to slide along the length direction of the X-axis guide rail A 313. A Z-axis guide rail A 316 and a Z-axis lead screw A 317 are arranged on the X-axis sliding table A 310. A Z-axis motor A 318 drives the Z-axis lead screw A 317 to rotate, thereby driving the Z-axis sliding table A 311 to slide along the length direction of the Z-axis guide rail A 316. The length direction of the X-axis guide rail A 313 is perpendicular to the length direction of the Z-axis guide rail A 316. An inner milling motor 319 is arranged on the Z-axis guide rail A 316 and is used for driving the inner milling cutter head 312.

[0046] Further, with reference to the accompanying drawings Figure 2The track assembly 500 comprises an inner ring annular track 501 and an outer ring annular track 502, and the outer ring annular track 502 is coaxially arranged on the outer periphery of the inner ring annular track 501; the trolley driving motor 601 is arranged on the rotating trolley 600 for driving the main transmission gear 602, the main transmission gear 602 is in external tooth meshing transmission with the inner ring annular track 501, the trolley driving motor 601 drives the rotating trolley 600 to move around the circumference of the inner ring annular track 501, and the rotating trolley 600 is supported and guided by the outer ring annular track 502 at the bottom.

[0047] Further, as shown in Figure 6 、 7 , the outer milling device 200 comprises a base 201 and a column 202 supported on the base 201 in the vertical direction, the top of the column 202 is provided with a Y-axis motor B 203, the column 202 is provided with a Y-axis sliding table B 204 sliding in the vertical direction, and the Y-axis sliding table B 204 is used for installing an outer milling unit 206; the top of the Y-axis sliding table B 204 is connected with one end of a traction steel wire rope 205, and the other end of the traction steel wire rope 205 is connected with a counterweight arranged in the column 202. The column 202 is provided with a Y-axis lead screw B 207 and a Y-axis guide rail B 208 in the vertical direction, the Y-axis lead screw B 207 drives the Y-axis sliding table B 204 to move up and down along the Y-axis guide rail B 208, and the Y-axis lead screw B 207 is driven to rotate by the Y-axis motor B 203. The outer milling unit 206 comprises an X-axis sliding table B 209, a Z-axis sliding table B 210 and an outer milling cutter head 211, the Y-axis sliding table B 204 is provided with an X-axis guide rail B 212 and an X-axis lead screw B 213, an X-axis motor B 214 drives the X-axis lead screw B 213 to rotate, thereby driving the X-axis sliding table B 209 to slide along the length direction of the X-axis guide rail B 212; the X-axis sliding table B 209 is provided with a Z-axis guide rail B 215 and a Z-axis lead screw B 216, a Z-axis motor B 217 drives the Z-axis lead screw B 216 to rotate, thereby driving the Z-axis sliding table B 210 to slide along the length direction of the Z-axis guide rail B 215, and the length direction of the X-axis guide rail B 212 is perpendicular to the length direction of the Z-axis guide rail B 215; the Z-axis guide rail B 212 is provided with an outer milling motor 218 for driving the outer milling cutter head 211.

[0048] A kind of pumped storage power station generator integrated yoke processing method, comprising the following steps:

[0049] S1: inner wall surface processing, starting inner circular groove processing equipment 300, 6 or 7 rectangular grooves 102 are evenly processed along the inner wall surface of integrated yoke 100, specifically comprising the following steps:

[0050] S1.1: start the inner milling motor 319, drive the Z-axis sliding table A311 along the Z-axis rail A316 by the Z-axis motor A318 to set the milling amount of the inner milling cutter head 312 in the Z-axis direction, i.e. the depth direction of the rectangular groove 102;

[0051] S1.2: start the Y-axis motor A309, drive the Y-axis sliding table A305 to slide along the vertical direction, i.e. the length direction of the rectangular groove 102, to the bottom of the integral magnetic yoke 100, so that the inner milling cutter head 312 mills a groove surface from top to bottom; then, drive the X-axis sliding table A310 along the X-axis rail A313 by the X-axis motor A315 to set the milling amount of the inner milling cutter head 312 in the X-axis direction, i.e. the width direction of the rectangular groove 102;

[0052] S1.3: start the Y-axis motor A309 again, drive the Y-axis sliding table A305 to slide along the vertical direction to the top of the integral magnetic yoke 100, so that the inner milling cutter head 312 mills from bottom to top; drive the X-axis sliding table A310 by the X-axis motor A315 to continue adjusting the milling amount of the inner milling cutter head 312 in the X-axis direction;

[0053] S1.4: repeat steps S1.2 and S1.3 until one rectangular groove 102 is completed, rotate the inner circular groove machining device 300 around the inner wall surface of the integral magnetic yoke 100 to the machining position of the next rectangular groove 102 by the numerical control turntable 400, and the numerical control turntable 400 controls the central angle between adjacent rectangular grooves 102 according to the number of rectangular grooves 102 to be machined;

[0054] S1.5: repeat steps S1.1 to S1.4 until each rectangular groove 102 is machined;

[0055] S2: tool setting: take the machined rectangular groove 102 as a reference, adjust the inner milling cutter head 312 to the center position of each rectangular groove 102 in turn, adjust the included angle between the planes where the outer milling cutter head 211 and the inner milling cutter head 312 are located by the numerical control turntable 400 and the rotating trolley 600, set two adjacent machining stations on the outer wall surface of the integral magnetic yoke 100 for each rectangular groove 102, and set 12 or 14 machining stations in total;

[0056] S3: outer wall surface machining, start the outer circular groove machining device 200, and machine 60 or 70 T-shaped grooves 103 along the machining stations on the outer wall surface of the integral magnetic yoke 100 (five adjacent T-shaped grooves 103 are machined on each machining station), which specifically includes the following steps:

[0057] S3.1: start the outer milling motor 218, drive the Z-axis sliding table B210 to slide along the Z-axis guide rail B215 by the Z-axis motor B217 to set the milling amount of the outer milling cutter head 211 in the Z-axis direction, i.e. the depth direction of the T-shaped groove 103;

[0058] S3.2: start the Y-axis motor B203, drive the Y-axis sliding table B204 to slide along the vertical direction, i.e. the length direction of the T-shaped groove 103, to the bottom of the integral magnetic yoke 100, so that the outer milling cutter head 211 mills a groove surface from top to bottom; then, drive the X-axis sliding table B209 to slide along the X-axis guide rail B212 by the X-axis motor B214 to set the milling amount of the outer milling cutter head 211 in the X-axis direction, i.e. the width direction of the T-shaped groove 103;

[0059] S3.3: start the Y-axis motor B203 again, drive the Y-axis sliding table B204 to slide along the vertical direction to the top of the integral magnetic yoke 100, so that the outer milling cutter head 211 mills from bottom to top; drive the X-axis sliding table B209 by the X-axis motor B214 to continue adjusting the milling amount of the outer milling cutter head 211 in the X-axis direction;

[0060] S3.4: repeat steps S3.2 and S3.3 until five adjacent T-shaped grooves 103 are machined in the same machining station, and drive the outer circular groove machining device 200 to rotate around the outer wall surface of the integral magnetic yoke 100 to the machining station of the next T-shaped groove 103 by the rotating trolley 600;

[0061] S3.5: repeat steps S3.1 to S3.4 until each T-shaped groove 103 is machined.

[0062] Preferably, the width of the rectangular groove 102 is ≤260mm; the inner diameter of the integral magnetic yoke 100 is φ2200-φ3200mm, the outer wall section of the integral magnetic yoke 100 is a regular polygon and is a regular dodecagon or a regular tetradecagon, the diameter of the inscribed circle of the regular polygon is φ3800-φ4700mm, and the side length of the regular polygon is ≤720mm; the height of the integral magnetic yoke 100 is 3000-4000mm, the weight of the integral magnetic yoke 100 is ≤220 tons; and the maximum cutting depth of the outer milling cutter head 211 and the inner milling cutter head 312 is ≥2.0mm.

[0063] It can be understood that equivalent replacements or changes to the technical solutions and inventive concepts of the present application made by those skilled in the art shall fall within the protection scope of the claims appended to the present application.

Claims

1. A processing equipment for an integral magnetic yoke of a pumped storage power station generator, characterized in that: include An integral magnetic yoke (100) is a cylindrical structure with a circular inner wall and a regular polygonal cross-section on the outer wall. The bottom of the integral magnetic yoke (100) is supported on the ground by a support base (101). An external circular groove processing device (200) is set on the outer periphery of the integral magnetic yoke (100) and is used to process the outer wall surface of the integral magnetic yoke (100); The inner groove processing equipment (300) is coaxially set in the inner cavity of the integral magnetic yoke (100) and is used to process the inner wall surface of the integral magnetic yoke (100); A CNC rotary table (400) is set at the bottom of the inner groove machining equipment (300) to support and drive the inner groove machining equipment (300) to rotate indexably around the axis of the integral magnetic yoke (100); A ring-shaped track assembly (500), which is set on the ground and coaxially arranged with an integral magnetic yoke (100); and A rotary trolley (600) is mounted on a track assembly (500) and moves around the circumference of the track assembly (500). The outer groove processing equipment (200) is supported on the rotary trolley (600). The rotary trolley (600) drives the outer groove processing equipment (200) to move around the outer circumference of the integral magnetic yoke (100). The track assembly (500) includes an inner ring track (501) and an outer ring track (502), with the outer ring track (502) disposed on the outer periphery of the inner ring track (501). The rotary trolley (600) is equipped with a trolley drive motor (601) for driving the main transmission gear (602). The main transmission gear (602) meshes with the external gear disposed on the inner ring track (501) for transmission. The trolley drive motor (601) drives the rotary trolley (600) to move circumferentially around the inner ring track (501). The bottom of the rotary trolley (600) is supported and guided by the outer ring track (502). The internal groove machining equipment (300) includes a central column (301), which is supported vertically on a CNC rotary table (400). A clamping bracket (302) and a rotary shaft (303) are provided on the top of the central column (301). The rotary shaft (303) is supported at the center of the clamping bracket (302) by a bearing assembly (304). The clamping bracket (302) clamps the top of the integral magnetic yoke (100). A Y-axis slide A (305) is slidably provided on the central column (301) in the vertical direction for mounting the internal milling unit (306).

2. The integral magnetic yoke processing equipment for pumped storage power station generators according to claim 1, characterized in that: The central column (301) is provided with a Y-axis lead screw A (307) and a Y-axis guide rail A (308) in the vertical direction. The Y-axis lead screw A (307) drives the Y-axis slide A (305) to move up and down along the Y-axis guide rail A (308). The Y-axis lead screw A (307) is driven by a Y-axis motor A (309) fixed on the central column (301).

3. The integral magnetic yoke processing equipment for pumped storage power station generators according to claim 1 or 2, characterized in that: The internal milling unit (306) includes an X-axis slide A (310), a Z-axis slide A (311), and an internal milling head (312). An X-axis guide rail A (313) and an X-axis lead screw A (314) are mounted on the Y-axis slide A (305). An X-axis motor A (315) drives the X-axis lead screw A (314) to rotate, thereby causing the X-axis slide A (310) to slide along the length of the X-axis guide rail A (313). The X-axis slide A (310) is equipped with... The Z-axis guide rail A (316) and the Z-axis lead screw A (317) are connected. The Z-axis motor A (318) drives the Z-axis lead screw A (317) to rotate, thereby causing the Z-axis slide A (311) to slide along the length direction of the Z-axis guide rail A (316). The length direction of the X-axis guide rail A (313) is perpendicular to the length direction of the Z-axis guide rail A (316). An internal milling motor (319) for driving the internal milling cutter head (312) is provided on the Z-axis guide rail A (316).

4. The integral magnetic yoke processing equipment for pumped storage power station generators according to claim 1, characterized in that: The external groove processing equipment (200) includes a base (201) and a column (202) supported vertically on the base (201). A Y-axis motor B (203) is provided on the top of the column (202), and a Y-axis slide B (204) is slidably provided on the column (202) in the vertical direction for installing an external milling unit (206). The top of the Y-axis slide B (204) is connected to one end of a traction steel wire rope (205), and the other end of the traction steel wire rope (205) is connected to a counterweight block provided in the column (202).

5. The integral magnetic yoke processing equipment for pumped storage power station generators according to claim 4, characterized in that: The column (202) is provided with a Y-axis lead screw B (207) and a Y-axis guide rail B (208) in the vertical direction. The Y-axis lead screw B (207) drives the Y-axis slide B (204) to move up and down along the Y-axis guide rail B (208). The Y-axis lead screw B (207) is driven to rotate by the Y-axis motor B (203).

6. The integral magnetic yoke processing equipment for pumped storage power station generators according to claim 4 or 5, characterized in that: The external milling unit (206) includes an X-axis slide B (209), a Z-axis slide B (210), and an external milling head (211). An X-axis guide rail B (212) and an X-axis lead screw B (213) are mounted on the Y-axis slide B (204). An X-axis motor B (214) drives the X-axis lead screw B (213) to rotate, thereby causing the X-axis slide B (209) to slide along the length of the X-axis guide rail B (212). The X-axis slide B (209) is equipped with... The Z-axis guide rail B (215) and the Z-axis lead screw B (216) are connected. The Z-axis motor B (217) drives the Z-axis lead screw B (216) to rotate, thereby causing the Z-axis slide B (210) to slide along the length direction of the Z-axis guide rail B (215). The length direction of the X-axis guide rail B (212) is perpendicular to the length direction of the Z-axis guide rail B (215). An external milling motor (218) for driving the external milling head (211) is provided on the Z-axis guide rail B (215).

7. A method for machining an integral magnetic yoke for a pumped-storage power station generator, using the integral magnetic yoke machining equipment for a pumped-storage power station generator as described in any one of claims 1 to 6, characterized in that: Includes the following steps: S1: Inner wall surface processing: Start the inner circular groove processing equipment (300) to uniformly process several rectangular grooves (102) along the inner wall surface of the integral magnetic yoke (100), specifically including the following steps: S1.1: Start the internal milling motor (319), and drive the Z-axis slide A (311) to slide along the Z-axis guide rail A (316) through the Z-axis motor A (318) to set the milling amount of the internal milling head (312) in the Z-axis direction, that is, the depth direction of the rectangular groove (102); S1.2: Start the Y-axis motor A (309) to drive the Y-axis slide A (305) to slide down vertically to the bottom of the integral magnetic yoke (100), so that the internal milling head (312) mills a groove surface from top to bottom; then, drive the X-axis slide A (310) to slide along the X-axis guide rail A (313) through the X-axis motor A (315) to set the milling amount of the internal milling head (312) in the X-axis direction, that is, the width direction of the rectangular groove (102); S1.3: Restart the Y-axis motor A (309) to drive the Y-axis slide A (305) to slide vertically upward to the top of the integral magnetic yoke (100), so that the internal milling head (312) mills from bottom to top; drive the X-axis slide A (310) through the X-axis motor A (315) to continue adjusting the milling amount of the internal milling head (312) in the X-axis direction; S1.4: Repeat steps S1.2 and S1.3 until a rectangular groove (102) is completed. The CNC rotary table (400) drives the inner groove processing equipment (300) to rotate around the inner wall of the integral magnetic yoke (100) to the processing position of the next rectangular groove (102). The CNC rotary table (400) controls the size of the central angle between adjacent rectangular grooves (102) according to the number of rectangular grooves (102) to be processed. S1.5: Repeat steps S1.1 to S1.4 until each rectangular groove (102) is machined; S2: Tool setting: Using the machined rectangular groove (102) as a reference, the inner milling cutter head (312) is adjusted to the center position of each rectangular groove (102) in sequence. The angle between the planes where the outer milling cutter head (211) and the inner milling cutter head (312) are located is adjusted using the CNC rotary table (400) and the rotary carriage (600). For each rectangular groove (102), two adjacent machining stations are set on the outer wall of the integral magnetic yoke (100). S3: Outer wall surface machining. Start the outer circular groove machining equipment (200) and machine several T-shaped grooves (103) along the machining station on the outer wall surface of the integral magnetic yoke (100). Specifically, the following steps are included: S3.1: Start the external milling motor (218), drive the Z-axis slide B (210) to slide along the Z-axis guide rail B (215) through the Z-axis motor B (217) to set the milling amount of the external milling head (211) in the Z-axis direction, that is, the depth direction of the T-slot (103); S3.2: Start the Y-axis motor B (203) to drive the Y-axis slide B (204) to slide down vertically to the bottom of the integral magnetic yoke (100), so that the external milling head (211) mills a groove from top to bottom; then, drive the X-axis slide B (209) to slide along the X-axis guide rail B (212) through the X-axis motor B (214) to set the milling amount of the external milling head (211) in the X-axis direction, that is, the width direction of the T-slot (103); S3.3: Restart the Y-axis motor B (203) to drive the Y-axis slide B (204) to slide vertically upward to the top of the integral magnetic yoke (100), so that the external milling head (211) mills from bottom to top; drive the X-axis slide B (209) through the X-axis motor B (214) to continue to adjust the milling amount of the external milling head (211) in the X-axis direction; S3.4: Repeat steps S3.2 and S3.3 until five adjacent T-slots (103) are machined at the same machining station. The outer circular groove machining equipment (200) is driven by the rotary carriage (600) to rotate around the outer wall of the integral magnetic yoke (100) to the machining station of the next T-slot (103). S3.5: Repeat steps S3.1 to S3.4 until each T-slot (103) is processed.

8. The method for machining an integral magnetic yoke for a hydro-storage power station generator according to claim 7, characterized in that: The number of rectangular grooves (102) is 6 or 7, and the width of the rectangular grooves (102) is ≤260mm; the number of T-shaped grooves (103) is 60 or 70; the inner diameter of the integral magnetic yoke (100) is φ2200~φ3200mm, the outer wall cross section of the integral magnetic yoke (100) is a regular polygon and is a regular dodecagon or regular tetragonal, the inscribed circle diameter of the regular polygon is φ3800~φ4700mm, and the side length of the regular polygon is ≤720mm; the height of the integral magnetic yoke (100) is 3000~4000mm, and the weight of the integral magnetic yoke (100) is ≤220 tons; the maximum depth of cut of the external milling cutter head (211) and the internal milling cutter head (312) is ≥2.0mm.

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