Structure design of permanent magnet auxiliary exciter

Abstract

The invention belongs to the technical field of permanent magnet auxiliary exciters, particularly relates to a permanent magnet auxiliary exciter structure design, and aims to solve the problems of complex connecting structure, many fault points and high manufacturing and mounting cost in the background technology. The permanent magnet auxiliary exciter structure design comprises a casing, and a main machine rotating shaft is arranged on the outer wall of one side of the casing; the top of the main machine rotating shaft is provided with an auxiliary exciter rotating shaft, and the outer wall of the outer circle of the auxiliary exciter rotating shaft is fixedly connected with a rotating rectifier. The auxiliary exciter rotating shaft is directly connected and fixed with the main machine rotating shaft through seam allowance positioning without an independent end cover and a bearing structure, meanwhile, a rotating rectifier mounting plane is machined on the outer surface of the rotating shaft, so that the auxiliary exciter rotating shaft has the function of a rotating rectifier support, and an auxiliary exciter stator iron core is connected through a shield seam allowance positioning mode. The motor base and the flange end cover which are traditionally designed are structurally simplified, the concentricity of stator and rotor assembly is improved on the basis that the structure is simpler, and the reliability is higher.

Description

Technical Field

[0001] The invention relates to the technical field of permanent magnet auxiliary exciters, and in particular to a structural design of a permanent magnet auxiliary exciter. Background Art

[0002] A permanent magnet auxiliary exciter is a special generator that combines the features of a permanent magnet motor and an auxiliary exciter. The main components of a permanent magnet auxiliary exciter include a permanent magnet rotor, which is usually composed of permanent magnets and does not require additional excitation coils or excitation current.

[0003] The auxiliary exciter rotor has an independent end cover and bearing structure. After the rotating rectifier is connected to the main rotor, the auxiliary exciter rotor is connected to the support of the rotating rectifier through an elastic pin coupling, and the stator is connected to the outer cover of the rotating rectifier through a flange end cover. The connection structure between the rotating rectifier of a traditional high-power high-voltage generator and the auxiliary exciter and main rotor is complex, with many failure points and high manufacturing and installation costs. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a permanent magnet auxiliary exciter structural design, which overcomes the deficiencies of the prior art and effectively solves the problems of complex connection structure, multiple failure points, and high manufacturing and installation costs.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A permanent magnet auxiliary exciter structure design, comprising a casing, a main machine shaft is arranged on the outer wall of one side of the casing, and an auxiliary exciter shaft is arranged on the top of the main machine shaft, a rotating rectifier is fixedly connected to the outer wall of the outer circle of the auxiliary exciter shaft, an auxiliary exciter rotor core is installed on the outer wall of the top of the auxiliary exciter shaft, and an auxiliary exciter stator core is arranged on the top of the auxiliary exciter rotor core, and an axial retaining ring is arranged on the outer wall of the auxiliary exciter rotor core;

[0007] A rear cover is arranged on an outer wall of one side of the housing, and a first connection plate is fixedly connected to an outer wall on the top of the rear cover, and a protective cover is fixedly connected to an outer wall on one side of the first connection plate.

[0008] Through the above scheme, the auxiliary exciter shaft does not need independent end cover and bearing structure, and is directly connected and fixed to the main machine shaft through the stopper. At the same time, the rotating rectifier installation plane is processed on the outer surface of the shaft, so that the auxiliary exciter shaft also has the function of rotating rectifier support. The auxiliary exciter stator core is positioned and connected through the stopper of the guard. The structure simplifies the base and flange end cover of the traditional design. On the basis of a simpler structure, the concentricity of the stator and rotor assembly is improved, which is more reliable.

[0009] Preferably, a second connecting plate is provided on the outer wall of the other side of the housing, and a first fastening bolt is fixedly connected between the second connecting plate and the main body shaft.

[0010] Preferably, a first stop is provided on the outer wall at the bottom of the auxiliary exciter shaft, and the main machine shaft is tightly attached to the inner wall of the first stop.

[0011] Preferably, a second fastening bolt is fixedly connected between the auxiliary exciter shaft and the rotating rectifier.

[0012] Preferably, a third fastening bolt is fixedly connected between the first connecting plate and the shield.

[0013] Preferably, a compression piece is provided on the outer wall of one end of the shield, and a fourth fastening bolt is fixedly connected between the compression piece and the shield.

[0014] Preferably, a second stop is formed on the outer wall of the bottom of the first connection plate, and the rear cover is tightly attached to the inner wall of the second stop.

[0015] Preferably, the top and bottom outer walls of the rear cover are fixedly connected with hanging ears.

[0016] The beneficial effects of the present invention are:

[0017] 1. The structural design of the permanent magnet auxiliary exciter of the present invention does not require an independent end cover or bearing structure, and is directly connected and fixed to the main shaft through a stopper. At the same time, a rotating rectifier installation plane is processed on the outer surface of the shaft, so that the auxiliary exciter shaft also has the function of a rotating rectifier support.

[0018] 2. The permanent magnet auxiliary exciter structure design of the present invention has the auxiliary exciter stator core positioned and connected through the cover stop, which simplifies the traditional design of the base and flange end cover. On the basis of a simpler structure, the concentricity of the stator and rotor assembly is improved, making it more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of a permanent magnet auxiliary exciter structure design proposed by the present invention;

[0020] Figure 2 It is an enlarged schematic diagram of the structure of part A of a permanent magnet auxiliary exciter structure design proposed by the present invention;

[0021] Figure 3 A schematic diagram of a shield connection structure for a permanent magnet auxiliary exciter structure design proposed in the present invention.

[0022] In the figure: 1. casing; 2. main engine shaft; 3. auxiliary exciter shaft; 4. rotating rectifier; 5. auxiliary exciter rotor core; 6. axial retaining ring; 7. auxiliary exciter stator core; 8. first connecting plate; 9. shield; 10. second connecting plate; 11. first fastening bolt; 12. first stop; 13. second fastening bolt; 14. third fastening bolt; 15. clamping plate; 16. fourth fastening bolt; 17. second stop; 18. hanging ear; 19. rear cover. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Embodiment 1, refer to Figures 1 to 2 A permanent magnet auxiliary exciter structure design includes a casing 1, a main machine shaft 2 is arranged on the outer wall of one side of the casing 1, and an auxiliary exciter shaft 3 is arranged on the top of the main machine shaft 2, a rotating rectifier 4 is fixedly connected to the outer wall of the outer circle of the auxiliary exciter shaft 3, an auxiliary exciter rotor core 5 is installed on the outer wall of the top of the auxiliary exciter shaft 3, and an auxiliary exciter stator core 7 is arranged on the top of the auxiliary exciter rotor core 5, and an axial retaining ring 6 is arranged on the outer wall of the auxiliary exciter rotor core 5.

[0025] In this embodiment, the auxiliary exciter shaft 3 does not need an independent end cover or bearing structure, and is directly connected and fixed to the main shaft 2 through a stopper. At the same time, a mounting plane for the rotating rectifier 4 is processed on the outer surface of the shaft, so that the auxiliary exciter shaft 3 also serves as a support for the rotating rectifier 4.

[0026] Example 2, refer to Figures 1 to 3 A permanent magnet auxiliary exciter structure design, a rear cover 19 is provided on the outer wall of one side of the casing 1, and a first connecting plate 8 is fixedly connected to the top outer wall of the rear cover 19, and a protective cover 9 is fixedly connected to the outer wall of one side of the first connecting plate 8.

[0027] In this embodiment, the auxiliary exciter stator core 7 is positioned and connected by the stopper of the shield 9, which simplifies the structure of the traditional design of the base and flange end cover. On the basis of a simpler structure, the concentricity of the stator and rotor assembly is improved, and it is more reliable.

[0028] Reference Figure 1 A second connecting plate 10 is disposed on the outer wall of the other side of the housing 1 , and a first fastening bolt 11 is fixedly connected between the second connecting plate 10 and the main body shaft 2 .

[0029] Reference Figure 1 A first stop 12 is formed on the outer wall of the bottom of the auxiliary exciter shaft 3 , and the main machine shaft 2 is tightly attached to the inner wall of the first stop 12 .

[0030] Reference Figure 1 A second fastening bolt 13 is fixedly connected between the auxiliary exciter shaft 3 and the rotating rectifier 4 .

[0031] Reference Figure 3 A third fastening bolt 14 is fixedly connected between the first connecting plate 8 and the shield 9 .

[0032] Reference Figure 3 A compression piece 15 is provided on the outer wall of one end of the shield 9 , and a fourth fastening bolt 16 is fixedly connected between the compression piece 15 and the shield 9 .

[0033] Reference Figures 1 to 3 A second stop 17 is formed on the outer wall of the bottom of the first connecting plate 8 , and the rear cover 19 is tightly attached to the inner wall of the second stop 17 .

[0034] Reference Figure 1 The top and bottom outer walls of the rear cover 19 are fixedly connected with hanging ears 18.

[0035] Working principle: a stop is machined at one end of the auxiliary exciter shaft 3 to position it with the main machine shaft 2, the auxiliary exciter shaft 3 is fixed by using threaded holes and related fasteners on the cross section of the main machine shaft 2, a mounting plane and mounting threaded holes are machined on the outer circumference of the auxiliary exciter shaft 3, the rotating rectifier 4 is fixed to the outer circumference of the auxiliary exciter shaft 3 with fasteners, and the auxiliary exciter shaft 3 is positioned by the step on the auxiliary exciter shaft 3, the auxiliary exciter rotor core 5 is installed on the auxiliary exciter shaft 3 and fixed with an axial retaining ring 6, a stop is machined at one end of the protective cover 9, and the corresponding stop is used for positioning on the main machine side, and an axial stop is machined at the other end to position the stator core with winding of the auxiliary exciter, threaded holes are machined on the positioning plane to fix the stator core with winding of the auxiliary exciter, and radial threaded holes are machined on the outer circumference of the stator core side with winding of the auxiliary exciter for installing the rear cover 19, so as to protect the permanent magnet auxiliary exciter.

[0036] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0038] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A permanent magnet auxiliary exciter structure design, comprising a housing (1), characterized in that: A main machine shaft (2) is arranged on the outer wall of one side of the casing (1), and an auxiliary exciter shaft (3) is arranged on the top of the main machine shaft (2); a rotating rectifier (4) is fixedly connected to the outer wall of the outer circle of the auxiliary exciter shaft (3); an auxiliary exciter rotor core (5) is installed on the outer wall of the top of the auxiliary exciter shaft (3); an auxiliary exciter stator core (7) is arranged on the top of the auxiliary exciter rotor core (5); and an axial retaining ring (6) is arranged on the outer wall of the auxiliary exciter rotor core (5); A rear cover (19) is provided on an outer wall of one side of the housing (1), and a first connection plate (8) is fixedly connected to the top outer wall of the rear cover (19), and a protective cover (9) is fixedly connected to the outer wall of one side of the first connection plate (8).

2. A permanent magnet auxiliary exciter structure design according to claim 1, characterized in that: A second connection disk (10) is provided on the outer wall of the other side of the housing (1), and a first fastening bolt (11) is fixedly connected between the second connection disk (10) and the main machine shaft (2).

3. A permanent magnet auxiliary exciter structure design according to claim 1, characterized in that: The bottom outer wall of the auxiliary exciter shaft (3) is provided with a first stop (12), and the main machine shaft (2) is tightly attached to the inner wall of the first stop (12).

4. A permanent magnet auxiliary exciter structure design according to claim 1, characterized in that: A second fastening bolt (13) is fixedly connected between the auxiliary exciter rotating shaft (3) and the rotating rectifier (4).

5. A permanent magnet auxiliary exciter structure design according to claim 1, characterized in that: A third fastening bolt (14) is fixedly connected between the first connecting plate (8) and the shield (9).

6. A permanent magnet auxiliary exciter structure design according to claim 1, characterized in that: A compression piece (15) is provided on the outer wall of one end of the shield (9), and a fourth tightening bolt (16) is fixedly connected between the compression piece (15) and the shield (9).

7. A permanent magnet auxiliary exciter structure design according to claim 1, characterized in that: A second stop (17) is provided on the outer wall of the bottom of the first connection plate (8), and the rear cover (19) is tightly attached to the inner wall of the second stop (17).

8. A permanent magnet auxiliary exciter structure design according to claim 1, characterized in that: The top and bottom outer walls of the rear cover (19) are both fixedly connected with hanging ears (18).

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