阅读说明：本技术 一种无刷同步主发电机转子结构 (Brushless synchronous main generator rotor structure ) 是由 郑守海 任延生 张卫 许勇 魏小文 魏超 景万鹏 杜杰 于 2019-09-26 设计创作，主要内容包括：本发明属于同步主发电机转子领域,具体为一种无刷同步主发电机转子结构,包括锥型转轴,锥型转轴包括转轴大端和转轴,转轴大端内部设有空腔结构,空腔结构外圆加工有腰型孔,转轴大端上还设置有轴向通孔,轴向通孔和空腔连通,锥型转轴大端与主发磁轭连接,励磁机转子直接安装在转轴大端台阶上；励磁引线铜排从空腔结构外圆上的腰形孔进入空腔结构内部,导电螺杆一端连接旋转整流模块,另一端穿过轴向通孔并与励磁引线铜排连接。新型的主发电机转子结构使用整体锥型转轴,提高了转子的刚度和强度,简化了转子结构,优化了转子励磁引线的连接和固定,简化了引线连接和固定方式,提高了可靠性,减少了部件数量和加工工序,降低了成本。(The invention belongs to the field of synchronous main generator rotors, and particularly relates to a brushless synchronous main generator rotor structure which comprises a conical rotating shaft, wherein the conical rotating shaft comprises a rotating shaft large end and a rotating shaft, a cavity structure is arranged inside the rotating shaft large end, a waist-shaped hole is processed on the excircle of the cavity structure, an axial through hole is also arranged on the rotating shaft large end, the axial through hole is communicated with the cavity, the conical rotating shaft large end is connected with a main generator yoke, and an exciter rotor is directly arranged on a step of the rotating shaft large end; the excitation lead copper bar enters the cavity structure from a waist-shaped hole on the excircle of the cavity structure, one end of the conductive screw is connected with the rotary rectifying module, and the other end of the conductive screw penetrates through the axial through hole and is connected with the excitation lead copper bar. The novel rotor structure of the main generator uses the whole conical rotating shaft, improves the rigidity and the strength of the rotor, simplifies the rotor structure, optimizes the connection and fixation of the rotor excitation lead, simplifies the lead connection and fixation mode, improves the reliability, reduces the number of parts and processing procedures, and reduces the cost.)

1. A brushless synchronous main generator rotor structure is characterized by comprising a conical rotating shaft, wherein the conical rotating shaft comprises a rotating shaft large end with a step-shaped external outline and a rotating shaft connected to one side of the rotating shaft large end, a cavity structure (11) is arranged inside the rotating shaft large end, a kidney-shaped hole (12) is machined in the excircle of the cavity structure (11), an axial through hole (14) is further formed in the rotating shaft large end, the axial through hole (14) is communicated with the cavity, the conical rotating shaft large end is connected with a main generating yoke (1), and an exciter rotor (5) is directly installed on the step of the rotating shaft large end; inside excitation lead copper bar (3) got into cavity structure (11) from the waist shape hole on the cavity structure excircle, rotatory rectifier module (10) were connected to conductive screw (9) one end, and the other end passed axial through hole (14) and was connected with excitation lead copper bar (3).

2. A brushless synchronous main generator rotor structure according to claim 1, wherein the cavity structure (11) is formed with two stepped planes, the end of the axial through hole (14) communicating with the cavity is located on the first stepped plane (13) below, and the second stepped plane (15) above is formed with bolt holes (16) for mounting a pressure plate; the excitation lead copper bar (3) enters the cavity structure (11) from a waist-shaped hole on the excircle of the cavity structure, is installed on a base plate (20) on the second step plane (15) and is fixed by a pressing plate (19).

3. A brushless synchronous main generator rotor structure according to claim 1 or 2, wherein the conducting screw (9) is further secured in the axial through hole (14) by a sealant (22).

4. A brushless synchronous main generator rotor structure according to claim 1 or 2, characterized in that the large end of the shaft is provided with a spigot, through which the large end of the shaft is connected to the main generator yoke (1).

5. A brushless synchronous main generator rotor structure according to claim 1 or 2, wherein the conductive screw (9) is covered with an insulating tube on its surface.

6. A brushless synchronous main generator rotor structure according to claim 1 or 2, wherein the excitation lead copper bars are of I-shaped configuration.

7. A brushless synchronous main generator rotor structure according to claim 1 or 2, characterized in that the backing plate (20) and the pressure plate (8) are both circular arc shaped plates.

Technical Field

The invention belongs to the field of synchronous main generator rotors, and particularly relates to a brushless synchronous main generator rotor structure.

Background

In recent years, diesel engines of diesel locomotives are developed towards high power and high rotating speed, and the power and the rotating speed of a matched synchronous main generator are improved. After the power of the main generator is improved, the weight and the volume of the rotor are increased, and higher requirements on the rigidity and the strength of the rotating shaft are provided. The increase of the rotating speed also requires higher rigidity and stability of the rotating shaft. Therefore, the reliable and stable rotor structure of the synchronous main generator becomes a key technology for the development of the internal combustion locomotive towards high power and high rotating speed.

The structure of the rotor of the existing brushless synchronous main generator is shown in figure 1: the rotor bracket 2 is formed by welding a cylinder and a rib plate, is processed and then forms bracket assembly with the rotating shaft 7 in a hot sleeving manner, and the bracket 2 is connected with the main magnetic excitation yoke 1 through a spigot. The exciter rotor 5 is arranged on a lining 6, the lining 6 is sleeved on a rotating shaft 7 in a hot mode, three-phase alternating current generated by the exciter rotor 5 is converted into direct current through a rotating rectifying module 10, and then the direct current is transmitted to the main rotor through a conductive screw 9 and an excitation lead copper bar 3. Excitation lead copper bar 3 passes through fixing base 4 and clamp plate 8 to be fixed in the pivot.

The existing main generator rotor structure has the following defects:

(1) the rotor support is of a rib plate welding structure, and the overall rigidity and the strength are poor.

(2) The rotor support is formed by welding a plurality of components such as a cylinder, a disc, a rib plate and a flange, and has the advantages of complex structure, long production period and high cost.

(3) The rotor support and the rotating shaft are of a split structure, the reheating sleeves need to be machined respectively, and the integral reheating sleeves are subjected to finish machining again after being heated, so that the structure is complex, the machining procedures are multiple, and the machining cost is high.

(4) The exciter rotor can not be directly matched with the rotating shaft, and a bush needs to be installed on the rotating shaft firstly, so that the process is complex.

(5) The excitation lead copper bar connecting the main rotor and the exciter rotor is long, needs to be bent twice, needs to increase a fixed point on the rotating shaft, and is complex in structure and low in reliability.

Disclosure of Invention

The invention provides a novel main generator rotor structure, which is characterized in that innovation is carried out on the rotor structure, the existing support and rotating shaft assembling structure is changed, a brand-new integrally-forged conical rotating shaft structure is designed, the rigidity and the strength of a generator rotor are improved, and the rotor structure is simplified. The novel rotor structure of the main generator optimizes the connection and fixation of the rotor excitation lead, simplifies the lead connection and fixation mode, improves the reliability, reduces the number of parts and processing procedures, and reduces the cost.

The invention is realized by adopting the following technical scheme: a brushless synchronous main generator rotor structure comprises a conical rotating shaft, wherein the conical rotating shaft comprises a rotating shaft large end with a step-shaped external outline and a rotating shaft connected to one side of the rotating shaft large end, a cavity structure is arranged inside the rotating shaft large end, a waist-shaped hole is machined in the excircle of the cavity structure, an axial through hole is further formed in the rotating shaft large end and communicated with the cavity, the conical rotating shaft large end is connected with a main generator yoke, and an exciter rotor is directly mounted on the step of the rotating shaft large end; the excitation lead copper bar enters the cavity structure from a waist-shaped hole on the excircle of the cavity structure, one end of the conductive screw is connected with the rotary rectifying module, and the other end of the conductive screw penetrates through the axial through hole and is connected with the excitation lead copper bar.

Furthermore, a plane with two steps is processed in the cavity structure, one end of the axial through hole communicated with the cavity is positioned on the lower first step plane, and a bolt hole for installing a pressure plate is processed on the upper second step plane; the excitation lead copper bar enters the cavity structure from the waist-shaped hole on the excircle of the cavity structure, is installed on the base plate on the plane of the second step and is fixed by the pressing plate. Excitation lead copper bar gets into the cavity and then fixes through the clamp plate on the second step plane earlier, it is stable to make the installation of excitation lead copper bar, again because conducting screw and excitation lead copper bar connection end need use gasket isotructure, make this tip of conducting screw have certain thickness, so make the difference in height between two steps balanced above-mentioned thickness behind the axial through hole lies in the first step plane of below, and then make excitation lead copper bar vertical fixation, it is "I" type to excite the lead copper bar by original "Z" type improvement promptly.

Furthermore, the conductive screw rod is fixed in the axial through hole by using a sealant.

Furthermore, a spigot is arranged at the large end of the rotating shaft, and the large end of the rotating shaft is connected with the main magnetic transmitting yoke through the spigot.

Furthermore, the surface of the conductive screw rod is sleeved with an insulating pipe.

Furthermore, the excitation lead copper bar is of an I-shaped structure.

Furthermore, the backing plate and the pressing plate are both arc-shaped plates.

The technical scheme of the invention has the following beneficial effects:

(1) the integrally forged conical rotating shaft has the advantages that the outer diameter is increased, the length is shortened, the integral rigidity and the strength of the rotor are improved, and the requirements of high power and high rotating speed of a main generator on the stability of the rotor can be met.

(2) 4 parts such as a bracket, a rotating shaft, a bushing, a fixed seat and the like in the original rotor structure are replaced by the integrally forged conical rotating shaft, so that the number of the parts and the processing procedures are reduced, the production period is shortened, and the manufacturing cost is reduced.

(3) The excitation lead copper bar with the new structure is improved from a Z shape to an I shape, can vertically enter a cavity of the rotating shaft to be connected and fixed, and has simple and reliable structure.

(4) The waist-shaped wire outlet hole and the cavity at the large end of the rotating shaft optimize the fixing mode and the wire outlet mode of the excitation lead copper bar, so that the fixing risk of the excitation lead wire is fundamentally solved, and the reliability is improved.

Drawings

Fig. 1 is a schematic view of a conventional rotor structure.

Fig. 2 is a schematic structural view of a tapered spindle.

Fig. 3 is a view from direction a of fig. 2.

Fig. 4 is a schematic view of the rotor structure of the present invention.

Fig. 5 is a view taken along direction a of fig. 4.

Fig. 6 is a view from direction B of fig. 4.

In the figure: 1-main magnetic generating yoke, 2-rotor bracket, 3-excitation lead copper bar, 4-fixing seat, 5-exciter rotor, 6-bushing, 7-rotating shaft, 8-pressing plate, 9-conductive screw, 10-rotary rectifying module, 11-cavity structure, 12-kidney-shaped hole, 13-first step plane, 14-axial through hole, 15-second step plane, 16-bolt hole, 17-conical rotating shaft, 18-sealant, 19-pressing plate and 20-backing plate.

Detailed Description

The tapered spindle structure shown in fig. 2 and 3:

a. a brand-new integrally forged conical rotating shaft 17 is designed, the overall diameter is increased, the length is shortened, the quality is kept unchanged, and the conical rotating shaft integrates the functions of the four accessories of the original rotor bracket 2, the rotating shaft 7, the fixed seat 4 and the lining 6.

b. The big end of the rotating shaft is connected with a rotor magnetic yoke through a spigot, a cavity structure 11 is designed in the big end of the rotating shaft, and two waist-shaped holes 12 are machined in the excircle of the cavity structure 11 and used for leading out the excitation lead copper bar 3.

c. The cavity structure 11 is internally provided with two step planes, the first step plane 13 is provided with two axial through holes 14 for installing two conductive screws, and the second step plane 15 is provided with bolt holes 16 for installing a pressure plate.

The rotor structure of the present invention is shown in fig. 4, 5 and 6:

a. the large-end spigot of the tapered rotating shaft is connected with the main magnetic excitation yoke 1, and the exciter rotor 5 is directly arranged on the large-end step of the rotating shaft.

b. The excitation lead copper bar 3 enters the cavity from the waist-shaped hole 12, is arranged on a base plate 20 on the second step plane 15 and is fixed by a pressing plate 19.

c. One end of the conductive screw 9 is connected with the rotary rectifying module 10, the other end of the conductive screw penetrates through the axial through hole 14 in the rotating shaft, and after the conductive screw is fixed in the axial through hole by using a sealant 18, the other end of the conductive screw is connected with the excitation lead copper bar 3 on the first step plane 13.

d. Through the height adjustment of the backing plate 20, the excitation lead copper bar 3 is reliably fixed on two planes while being led out vertically.