JPS61262040A - Rotor for rotary electric machine - Google Patents

Abstract

PURPOSE:To reduce welding length, by welding and bonding one end side shaft section to the other end side shaft section with the spider section of an organized frame. CONSTITUTION:A rotary shaft 11 consists of one end side shaft section 12 and the other end side shaft section 13, with the intermediate distance between the sections 12, 13. A spider section 14 for bonding the both shaft sections 12, 13 together is organized with a plurality of struts 15 welded and fixed respectively and radially on the outer peripheral sections on the respective inner end side of the both shaft sections 12 and 13, bonding members 16 welded and fixed placed between the tips of the struts 15 corresponding with each other and with dovetails 16a formed on the outer peripheral section, and a plurality of reinforcing bars 17 arranged and welded and fixed respectively between the both respective struts 15 in the peripheral directions. In this manner, a rotor core 7 is fitted with the dovetail grooves 7a o be bonded and supported, on the dovetails 16a of the respective bonding members 16 of the spider section 14 assembled by the bonded frame.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotor for a rotating electrical machine in which a rotor core is fitted and supported in a spider portion formed by welding and fixing to a rotating shaft.

[Conventional technology]

Figures 3 and 4 are from Hitachi Review Vol. 1.62 No.
.

10 (1980-10) P5'7 is a front view and a side sectional view of a conventional rotor. In the figure, 1
is a rotating shaft, and seven flange portions 2a and 3a are formed by welding or integrally forming shaft portions 2 and 3 on both sides, and a hollow intermediate shaft portion 4 that connects both by welding or bolt means. It is configured. Reference numeral 5 designates a plurality of pairs of support plates each of which is welded to the outer periphery of the intermediate shaft portion 4 in a chevron shape, and reference numeral 6 designates a plurality of connection members welded and fixed to the top of each pair of support plates 5. is provided. The rotor core is doptail-coupled and laminated to these coupling members, and is clamped by a clamper 9, and a rotor coil (all not shown) is inserted into a slot on the outer circumference.

In the conventional rotor described above, the coupling member 6 is fixedly supported by a pair of support plates 5 fixed to the hollow intermediate shaft portion 4 in a triangular shape, so as to withstand enormous torque.

[Problem that the invention seeks to solve]

The conventional rotor as described above uses a hollow intermediate shaft portion 4 and is expensive. In addition, the welding length becomes long due to the fixation of the hollow intermediate shaft portion 4 and the support plate 5, and the welding operation takes a long time. For small applications, there was a problem of excessive quality.

The present invention has been made to solve these problems, and aims to provide a rotor for a rotating electrical machine that eliminates the hollow shaft portion, does not require a light IT structure, and has a reduced cost.

[Failure to solve the problem]

In the rotor according to the present invention, the hollow intermediate shaft portion is omitted, and a plurality of support columns are fixed radially to the outer periphery of each inner end side of the one end side shaft portion and the other end side shaft portion, and each of the support columns in the circumferential direction is fixed. Reinforcing rods are welded and fixed in between, and connecting members are axially passed and welded to the ends of the corresponding support columns on both sides to form a spider section, and a rotor core is attached to the outer periphery of these connecting members. It was inset and supported.

[action] In this invention, the shaft portions on one end side and the other end side are connected by a spider portion having a framework structure including a support column, a connecting member, and a reinforcing rod, so that the welding length can be short and the device can be lightweight.　゛ 〔Example〕

FIGS. 1 and 2 are a front view and a side sectional view showing an embodiment of a rotor according to the present invention. In the figure, reference numeral 11 denotes a rotating shaft, which is composed of a shaft portion 12 on one end side and a shaft portion 13 on the other end side spaced apart from each other. Reference numeral 14 denotes a spider portion that connects both shaft portions 12 and 13, and is constructed as follows. Reference numeral 15 denotes a support column for a duplicate book that is radially welded to the outer periphery of each of the inner ends of both shaft parts 12 and 13, and 16 is a support column that was once welded and fixed to the tip of each of the corresponding support columns 15. A dovetail 16a is formed on the outer periphery of the plurality of connecting members. Reference numeral 17 designates a plurality of reinforcing rods that are inserted between the supporting columns 15 in the circumferential direction and fixed by welding.

The rotor core 7 is fitted into the dovetail grooves 7a of the dovetails 16a of the respective coupling members 16 of the spider section 14 constructed by frame coupling in this manner and is coupled and supported. Clampers 8 are fitted to both ends of the rotor core 7 and tightened.

In the rotor of the above-mentioned embodiment, both shaft parts 12 and 13 are connected by a spider part 14 having a skeleton structure, and the rotor is lightweight, requires a short welding length, and has a sufficient length for load transmission. It has rigidity.

FIG. 3 is a side sectional view of a rotor showing another embodiment of the present invention, in which both shaft portions 12 and 13 are attached to the spider portion.
Reinforcing rods 19 are welded and fixed between the outer circumference of the inner end and the inner intermediate portion of the coupling member 16, respectively.

In this way, the rigidity of the spider portion 18 is further increased by each reinforcing bar 19, and the weight increase is small.

In addition, in the above embodiment, the dovetail 16 is attached to the coupling member 16.
a and dovetail grooves 7ai were provided in the rotor core 7 for coupling, but the coupling member may be provided with a dovetail groove and the rotor core may be provided with a dovetail.

In addition, in order to connect and support the rotor core by fitting it into the connecting member,
In the above embodiment, dovetail coupling was used, but in machines with a small capacity, a circular core plate is used, and instead of using dovetail means, only one of the coupling members is provided with a keyway in the axial direction, and the rotor core is keyed. They may be coupled by one means.

[Effects of the Invention] As described above, according to the present invention, the one end shaft portion and the other end shaft portion that make up the entire rotating shaft are welded together by the spider portion having a skeleton structure, and the connecting member of the spider portion is welded together. Since the rotor core is fitted and supported on the outer periphery, the hollow intermediate shaft section between both shaft sections can be omitted, the welding length can be significantly reduced, the weight can be reduced, and the cost can be reduced.

[Brief explanation of the drawing]

1 and 2 are a front view and a side sectional view of a rotor of a rotating electric machine according to an embodiment of the present invention, FIG. 3 is a side sectional view of a rotor showing another embodiment of the invention, and FIG. Figure and 5th
The figures are a front view and a side sectional view of a conventional rotor. 7... Rotor core, 11... Rotating shaft, 12... One end side shaft portion, 13... Other end side shaft portion, 14... Spider portion, 15... Support column, 16... ...Connecting member, 17...
・Reinforcement rod, 1st...Spider part, 19...Reinforcement bar material

Claims (2)

[Claims] (1) A rotating shaft in which one end side shaft part and the other end side shaft part are arranged at an intermediate interval in the axial direction, and the shaft parts are welded and fixed to the inner end side outer circumferential part of both shaft parts at equal intervals radially. a plurality of support columns for a plurality of support columns, a plurality of coupling members each axially straddling the tip of each of these corresponding support columns and fixed by welding, and a plurality of coupling members inserted between each of the support columns adjacent in the circumferential direction of both the A rotor for a rotating electrical machine, which includes a spider section composed of a plurality of reinforcing rods fixed by welding, and a rotor core is fitted and supported on the outer periphery of each connecting member of the spider section. (2) A plurality of reinforcing rods are provided, each of which is welded and fixed to the outer circumferential side of the inner end of both shaft parts and the inner middle part of the coupling member. The rotor of the mentioned rotating electric machine.