JPH01255456A - Rotor for rotary electric machine - Google Patents

Abstract

PURPOSE:To reduce a manufacturing cost and to improve the reliability in strength of a rotor by forming a shaft end coupling and a blower holder integrally with a rotor shaft, forming cutouts on the outer periphery of the coupling, and forming cutouts alternately facing the cutouts of the coupling to retain a blower. CONSTITUTION:A blower blade 11 is engaged with a blower holder 4a formed integrally by cutting from a rotor shaft 4. Then, the cutouts 15a of a blower retainer 15 are inserted into the cutouts 4c of a coupling 4c, alternately disposed, the retainer 15 is inserted to retain the blade 11, and clamped by a blower clamping member 14. Accordingly, since the blower holder and the shaft end coupling are integrally cut from the rotor shaft itself, it can be inexpensively manufactured, and since it is not of an engaging structure of different members, its reliability in strength can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotor of a rotating electrical machine, and particularly to a cooling blower device thereof.

[Conventional technology]

FIG. 4 shows a conventionally known rotor of this type of rotating electric machine, and FIG. 5 shows a cross section of a main part of the cooling blower device. In the figure, 1 is a stator frame, 2 is a stator core, 3 is a stator coil, 4 is a rotor shaft, 5 is a cooling blower device provided on the rotor shaft 4, and 6 is a cooling blower device installed on the rotor shaft 4. 7 is a bearing device that supports the rotor; 8 is an air cooling device attached to the top of the stator frame 1; 9 is a coupling between the air cooling device 8 and the stator frame 1; 10 is the same exhaust duct, and in FIG. 5, 11 to 14 are cooling blower equipment. The parts constituting i5 include a blower blade 11, a blower holding member 12, a blower holder 13, and a tightening member 14 for the blower holder 13. Note that the arrows in FIG. 4 indicate the flow of cooling air.

Next, the assembly operation will be explained. First, the annular blower holding member 12 is fitted to the outer periphery of the rotor shaft 4, and then the blower blade 11 is attached to this, and the blower retainer 13 is attached from the side.
By assembling and tightening with the tightening member 14, the cooling blower device 5 is completed.

Therefore, the annular blower holding member 12 and the blower retainer 13
When assembling the shaft, the coupling 6 at the end of the shaft gets in the way, so I made a separate structure with the coupling 6 fitted into it, assembled the cooling valve "1", and then attached the rotor shaft 4 to the rear rotor shaft 4.
[Problem to be Solved by the Invention] Since the rotor of the conventional rotating electric machine is configured as described above, the manufacturing cost of the blower holding member and the fitting coupling is high ( Therefore, a large amount of time was required for the manoni fitting work, etc.Furthermore, there were problems such as a decrease in reliability due to the fitting.

This invention was made to solve the above-mentioned problems, and by cutting the blower holding member and coupling from the shaft itself, the production cost of the blower holding member and coupling can be reduced and the strength -L is 4WWt. The goal is to obtain a rotor for a rotating electric machine that can be produced.

[Means for solving problems]

In the rotor of a rotating electric machine according to the present invention, the shaft end coupling and the holder are integrally formed with the rotor shaft, a notch is provided on the outer circumference of the coupling, and the outer diameter of the coupling is A blower holder with a smaller inner diameter is provided with notches that alternately face the notches of the coupling.

[Effect]

The rotor of the rotating electric machine according to the present invention can be assembled without any trouble because the shaft end coupling and the blower holder are provided with notches that face each other alternately.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

In FIGS. 1, 2, and 3, 4a is a protruding blower holding part cut out from the rotor shaft 4 having a bearing journal part, 4b is a coupling formed integrally with the rotor shaft 4, 4c are T-notches provided at equal intervals on the outer periphery of this coupling. Reference numeral 15 denotes a blower holder having T-notches 15&, which are arranged alternately with the notches 4C on the inner periphery, and its inner diameter is set to be smaller than the outer diameter of the coupling 4b. 16 is a bolt hole provided in the coupling 4b. Note that the other configurations are the same as those of the prior art, so explanations will be omitted.

Next, the assembly operation will be explained. Blower holding part 4a integrally formed by machining from rotor 1FII+4
After that, the blower holders 15 are fitted into the notches 4C of the couplings 4b arranged alternately.
By inserting the blower retainer 15 through the notch 15&, the blower blade 11 is pressed down, and the blower clamping member 14 is tightened.

〔Effect of the invention〕

As described above, according to the present invention, since the rotor holding part and the shaft end coupling are integrally machined from the rotor shaft itself, the device can be made at low cost, and since there is no fitting structure of different members, the strength is 1. This has the effect of improving the second reliability.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a rotor of a rotating electric machine according to an embodiment of the present invention, FIG. 2 is a view taken along the line ■-■ in FIG. 1, and FIG.
1, FIG. 4 is an assembled sectional view showing a rotor of a conventional rotating electric machine, and FIG. 5 is a sectional view of the main part of FIG. 4. In the figure, 4 is a rotor shaft, 4a is a blower holding part, 4b is a coupling, 4C is a notch, 11 is a blower blade, 15
1 is a blower holder, 1511 is a notch, and 16 is a bolt hole. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Claims] A cooling blower device is provided on the rotor shaft and a coupling is provided at the end of the rotor shaft, wherein the shaft end coupling and the blower holding portion are integrally formed with the rotor shaft, and A rotor for a rotating electric machine, comprising a notch provided on the outer periphery of the coupling, and an annular blower holder having alternately arranged notches so that the coupling can be inserted through the notches.