Three-stage motor exciter rotor structure

Abstract

The utility model provides a three-stage motor exciter rotor structure. The three-stage motor exciter rotor structure comprises a rotor core and a winding wound on the rotor core. The rotor iron core is connected with a diode support through an inner sheath and a bolt, the diode support is provided with a diode, and the diode is connected with a collector ring assembly; the diode bracket is a three-section type annular diode bracket and is provided with a dynamic balance weight interface, and the three-section type annular diode bracket is matched with the diode to form a circular rotary rectifier bridge; and the rotary rectifier bridge is connected and conducted with the collector ring assembly through a bolt. According to the mechanical fixing type compact rotating rectifier bridge, all parts are convenient to disassemble and maintain, the economical efficiency and the maintainability of the whole structure are improved, and the stability of the structure in the high-speed rotating process of a rotor can be guaranteed through mechanical fixing.

Description

Technical Field

[0001] The utility model relates to a rotor structure of an exciter for a three - stage motor, belonging to the technical field of mechanical engineering, and applicable to the integrated exciter rotor structure of an oil - cooled three - stage motor. Background Technique

[0002] The three - stage motor is developing towards high power, high speed, miniaturization, light weight and integration, and the requirements for the overall space and weight of the motor are becoming increasingly strict.

[0003] In the prior art, a compact exciter rotor structure proposed in a Chinese patent with the publication number CN213879550U includes a left collar, a right collar, a retaining ring, a cage and an exciter armature core. The outer surface of the exciter rotor bracket is in interference fit with the inner surface of the exciter armature core. The exciter rotating armature is wound in the groove surface of the exciter armature core structure and is pressed by the end plate of the exciter armature core. The inner surface of the exciter rotor bracket is connected to the cage by circumferentially evenly distributed screws. The left collar is riveted to the exciter rotor bracket by rivets. The right collar is respectively matched with the outer surface of the retaining ring and the exciter rotating armature, which can reduce the weight of the exciter rotor to a certain extent. However, the rotating rectifier is not integrated with the exciter rotor, and the overall axial occupied space is still relatively large.

[0004] Another example is a structure of the cooperation between an exciter rotor and a permanent magnet proposed in a Chinese patent with the publication number CN218771452U. This structure includes a rotor core and a stator core sleeved outside the rotor core. Each tooth part of the stator core is inlaid with a segmented permanent magnet, and single - tooth winding is carried out on each tooth of the stator core to form a fractional - slot concentrated winding. A rotor winding is wound on the rotor core and fixed with a rotor insulating sleeve ring, which can convert a three - stage generator into a two - stage generator and reduce the weight from the system. The technical route of this technology is different from that of the present application. The present application integrates the rotating rectifier with the exciter rotor, makes full use of the inner - circle space of the winding, and greatly reduces the overall space occupied by the rotor of the three - stage motor while ensuring the functions. Content of the Utility Model

[0005] To solve the above - mentioned technical problems, the utility model provides a rotor structure of an exciter for a three - stage motor. This rotor structure of the exciter for a three - stage motor aims at an aviation three - stage generator and proposes an integrated exciter rotor structure with a compact space, stable structure and insulation performance, and capable of realizing a rectifying function, meeting the operation requirements of a high - speed oil - cooled three - stage generator.

[0006] The utility model is achieved through the following technical solutions.

[0007] A rotor structure of a three - stage motor exciter provided by the utility model includes a rotor core and windings wound around the rotor core; the rotor core is connected with a diode support through a sheath and bolts, and diodes are arranged on the diode support, and the diodes are connected with a slip ring assembly; the diode support is a three - section annular diode support and is provided with a dynamic balance counterweight interface, and the three - section annular diode support and the diodes cooperate to form a circular rotating rectifier bridge; the rotating rectifier bridge and the slip ring assembly are connected and conducted through bolts. The diode support and the diodes are connected by threads, and counterbores are milled on the outer circular surface of the diode support.

[0008] The sheath includes an inner sheath and an outer sheath. The inner sheath is sleeved outside the diode support and is simultaneously in contact with the winding, and the outer sheath is sleeved outside the winding.

[0009] A plurality of fixed ears are arranged on the inner circular side wall of the inner sheath, and the fixed ears cooperate with the rotor core through bolts and nuts to fasten the diode support and the inner sheath.

[0010] The outer sheath is connected with the rotor core, the outer diameter of the outer sheath is smaller than the outer diameter of the rotor core, and the inner hole is in a flared shape; an insulating paper is arranged between the outer sheath and the winding, and oil - resistant structural adhesive is coated on both sides of the insulating paper.

[0011] One end of the outer sheath is provided with an oil - accumulating boss, and the other end is provided with a step; the oil - accumulating boss faces away from the rotor core and faces outwards, and a plurality of notches are arranged along the circumference of the step on the outer sheath;

[0012] The three - section annular diode supports are insulated from each other through insulating bushings and are insulated from the inner sheath through insulating paper.

[0013] A plurality of threaded holes are arranged on the end face of the diode support, and two of the threaded holes are connected with the lead - out wires of the winding through welding pieces, and counterweight washers are connected to the threaded holes at both ends through screws.

[0014] Double - hole lock washers are used for loosening prevention at the joints of the plurality of threaded holes.

[0015] The slip ring assembly includes a slip ring positive electrode and a slip ring negative electrode, an insulating plate is arranged between the slip ring positive electrode and the slip ring negative electrode, and an insulating plate is arranged between the slip ring positive electrode and the diode.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1. A mechanically fixed and compact rotating rectifier bridge is designed, and each component is convenient for disassembly and maintenance, improving the economy and maintainability of the overall structure, and the mechanical fixation can ensure the stability of the structure during the high - speed operation of the rotor;

[0018] 2. Improve the heat dissipation efficiency of the winding by enhancing the overall heat dissipation performance of the structure. Open holes axially in the iron core to facilitate the circulation of cooling oil mist for dissipating heat from the diodes, thereby improving the heat dissipation efficiency of the components.

[0019] 3. At the weight - adding part on the end face of the diode bracket, use screws, lock washers, and weight - adding washers to correct the dynamic balance. The dynamic balance can be significantly corrected in a narrow space. At the same time, the dynamic - balance weight can be detached, and the correction can be repeated. Brief Description of the Drawings

[0020] Figure 1 is the structural schematic diagram of the present utility model;

[0021] Figure 2 is the partial structural schematic diagram of the diode bracket of the present utility model;

[0022] Figure 3 is the structural schematic diagram of the inner sheath of the present utility model;

[0023] Figure 4 is the assembly drawing of the diode bracket, insulating bushing, and insulating paper of the present utility model;

[0024] Figure 5 is the structural schematic diagram of the slip - ring assembly of the present utility model;

[0025] Figure 6 is the structural schematic diagram of the outer sheath of the present utility model;

[0026] In the figures: 1 - rotor iron core, 2 - diode bracket, 3 - diode, 4 - inner sheath, 5 - outer sheath, 6 - slip - ring assembly, 61 - insulating plate, 62 - positive slip - ring, 63 - negative slip - ring, 7 - winding, 8 - weight - adding washer, 9 - solder tab, 10 - insulating bushing, 11 - insulating paper, 12 - lock washer. Detailed Description of the Preferred Embodiment

[0027] The technical solution of the present utility model will be further described below, but the scope of protection claimed is not limited thereto.

[0028] As Figures 1 to 6As shown in the figure, a rotor structure of a three-stage motor exciter includes a rotor core 1 and a winding 7 wound around the rotor core 1; the rotor core 1 is connected with a diode bracket 2 through a sheath and bolts, and a diode 3 is arranged on the diode bracket 2, and the diode 3 is connected with a slip ring assembly 6; the diode bracket 2 is a three-stage annular diode bracket and is provided with a dynamic balance counterweight interface, and the three-stage annular diode bracket cooperates with the diode to form a circular rotating rectifier bridge; the circular rotating rectifier bridge is connected and conducted with the slip ring assembly 6 through bolts to realize the conversion of alternating current to direct current in a rotating state. The diode bracket 2 and the diode 3 are connected by threads, and a counterbore is milled on the outer cylindrical surface of the diode bracket 2 to facilitate staking at the thread mating part to prevent loosening.

[0029] The sheath includes an inner sheath 4 and an outer sheath 5. The inner sheath 4 is sleeved outside the diode bracket 2 and is simultaneously attached to the winding 7, and the outer sheath 5 is sleeved outside the winding 7.

[0030] Preferably, the inner sheath 4 is a high-strength metal sheath.

[0031] A plurality of fixing ears are arranged on the inner circumferential side wall of the inner sheath 4, and the fixing ears are cooperated with the rotor core 1 through bolts and nuts to fasten the diode bracket 2 and the inner sheath 4.

[0032] The outer sheath 5 is connected with the rotor core 1. The outer diameter of the outer sheath 5 is smaller than the outer diameter of the rotor core 1, and the inner hole is in a flared shape to ensure the structural safety and reliability; an insulating paper 11 is arranged between the outer sheath 5 and the winding 7, and an oil-resistant structural adhesive is coated on both sides of the insulating paper 11 to improve the structural integrity.

[0033] One end of the outer sheath 5 is provided with an oil accumulation boss, and the other end is provided with a step; the oil accumulation boss faces away from the rotor core 1 and faces outwards to facilitate collecting oil to cool the winding 7, and a plurality of notches are arranged along the circumference of the step on the outer sheath 5 to facilitate the high-temperature oil of the winding 7 at the bottom of the slot to flow out;

[0034] The three-stage annular diode brackets are insulated from each other through an insulating bushing 10 and are insulated from the inner sheath 4 through an insulating paper 11.

[0035] A plurality of threaded holes are arranged on the end face of the diode bracket 2. At least two of the threaded holes are connected with the lead-out wire of the winding 7 through a high-strength solder tab 9 to realize the lead-out of the current in the winding 7, and the threaded holes at both ends are connected with arc-shaped counterweight gaskets 8 through screws to facilitate the overall dynamic balance of the rotor.

[0036] Double-hole lock washers 12 are used in cooperation to prevent loosening at the mating parts of the plurality of threaded holes.

[0037] The slip ring assembly 6 includes a slip ring positive electrode 62 and a slip ring negative electrode 63. An insulating plate 61 is provided between the slip ring positive electrode 62 and the slip ring negative electrode 63, and an insulating plate 61 is also provided between the slip ring positive electrode 62 and the diode 3.

[0038] Specifically, after 6 diodes 3 are assembled on the circular rectifier bridge, a circumferential rotating rectifier bridge is formed.

[0039] Preferably, threaded holes are designed at the end of the diode bracket 2, and fixed ears are designed inside the inner sheath 4. The two cooperate with each other and are tightly fixed and positioned with the rotor core 1 through bolts and nuts.

[0040] Furthermore, the conductive performance of the mating surface between the diode bracket 2 and the diode 3 is enhanced by means such as surface treatment and coating with conductive adhesive.

[0041] In summary, in order to achieve the structural functions of a high-speed, high-power density, and compact oil-cooled three-stage generator, the present utility model designs an integrated exciter rotor structure to meet the structural functions of the three-stage generator.

Claims

1. A three-stage motor exciter rotor structure, comprising a rotor core (1) and a winding (7) wound around the rotor core (1), characterized in that: The rotor core (1) is connected to a diode bracket (2) via a sheath (4) and bolts, a diode (3) is provided on the diode bracket (2), and the diode (3) is connected to a slip ring assembly (6); the diode bracket (2) is a three-section annular diode bracket and is provided with a dynamic balancing weight interface, the three-section annular diode bracket cooperates with the diode (3) to form a circular rotating rectifier bridge; the rotating rectifier bridge and the slip ring assembly (6) are connected and conducted via bolts.

2. The three-stage motor exciter rotor structure according to claim 1, characterized in that: The diode bracket (2) is connected to the diode (3) via threads, and a countersunk hole is milled on the outer cylindrical surface of the diode bracket (2).

3. The three-stage motor exciter rotor structure according to claim 1, characterized in that: The sheath comprises an inner sheath (4) and an outer sheath (5); the inner sheath (4) is sleeved on the outside of the diode bracket (2) and is in contact with the winding (7); and the outer sheath (5) is sleeved on the outside of the winding (7).

4. The three-stage motor exciter rotor structure according to claim 3, characterized in that: The inner circular side wall of the inner sheath (4) is provided with a plurality of fixing ears, which cooperate with the rotor core (1) through bolts and nuts to fasten the diode bracket (2) and the inner sheath (4).

5. The three-stage motor exciter rotor structure according to claim 3, characterized in that: The outer sheath (5) is connected to the rotor core (1); the outer diameter of the outer sheath (5) is smaller than the outer diameter of the rotor core (1); and the inner hole is in a trumpet shape; insulating paper (11) is provided between the outer sheath (5) and the winding (7), and oil-resistant structural adhesive is coated on both sides of the insulating paper (11).

6. The three-stage motor exciter rotor structure according to claim 5, characterized in that: One end of the outer sleeve (5) is provided with an oil accumulation boss, and the other end is provided with a step; the oil accumulation boss faces outward away from the rotor core (1), and the step has multiple notches along the circumference of the outer sleeve (5).

7. The three-stage motor exciter rotor structure according to claim 3, characterized in that: The three-section annular diode brackets are insulated from each other via insulating bushings (10), and are insulated from each other and the inner sheath (4) via insulating paper (11).

8. The three-stage motor exciter rotor structure according to claim 1, characterized in that: The end surface of the diode bracket (2) is provided with a plurality of threaded holes, at least two of which are connected to the lead-out wires of the winding (7) via welding sheets (9), and the threaded holes at both ends are connected to counterweight gaskets (8) via screws.

9. The three-stage motor exciter rotor structure according to claim 8, characterized in that: The multiple threaded holes are matched at each other using double-hole anti-loosening washers (12) to prevent loosening.

10. The three-stage motor exciter rotor structure according to claim 1, characterized in that: The slip ring assembly (6) comprises a slip ring positive electrode (62) and a slip ring negative electrode (63), an insulating plate (61) is provided between the slip ring positive electrode (62) and the slip ring negative electrode (63), and an insulating plate (61) is provided between the slip ring positive electrode (62) and the diode (3).

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