JPS62189929A - Rotor for rotary electric machine and its manufacture - Google Patents

Abstract

PURPOSE:To facilitate the composition of a rotary shaft, by fitting a bush with processed ventilating grooves, on the shaft member of a small diameter, to compose the rotary shaft. CONSTITUTION:Through the outer peripheral section of the bush 4 of the same diameter and the same length as the largest diameter section of a rotary shaft, a plurality of axis-directional ventilating grooves 5 are bored, and an inner diameter section 6 is made smaller than the diameter of intermediate sections between a plurality of the ventilating grooves 5 confronted with each other. On the inner diameter section 6 of the bush 4, a shaft member 7 of the same outer diameter section as the inner diameter section 6 of the bush 4 and of the same full length as the full length of the rotary shaft is fitted. The rotary shaft is formed with the bush 4 and the shaft member 7. As a result, the rotary shaft can be processed by a small machine, and a small crane also is available enough.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotating t4L maple rotor and a manufacturing method thereof.

[Conventional technology]

Figures 46 and 7 are cross-sectional views showing the rotor of the conventional Ik electric immersion disclosed in, for example, Japanese Utility Model Application Publication No. 59-145247. Iron core 2
) is a rotating shaft fitted into the V3 peripheral part of this rotor core (1), and (3) is a rotor core with multiple markings provided in the axial direction on the large outer diameter part of this rotating shaft (2). This is a ventilation hole that is slightly longer than the part where the ill is inserted. And Heaven 14] 4 (b) shows the flow of cooling air.

Next, the operation will be explained. The cooling air sent by the circular fan (not shown) of the rotating tjL machine flows as shown by the arrow ^, and as it passes through the rotor core (1)
It cools the inner periphery and exits as shown by the arrow Φ.

[Problem that the invention seeks to solve]

Since the conventional rotor of a rotating electric machine and its manufacturing method are configured as described above, the rotating shaft must be excavated to form cooling ventilation grooves, and the rotating shaft has a large diameter and a long length. It was necessary to process the machine on an II machine, and the weight of the rotating shaft was heavy, so there were many problems such as the need for a large lane.

This invention was made to solve the above-mentioned problems, and it is possible to form ventilation grooves without drilling the rotating shaft, and by machining a pusher with a small diameter and short length, the ventilation groove can be formed. The first time you can @t*! ! The purpose is to obtain the first trooper and his protection.

[Means for solving problems]

A rotor for four rotary machines and a method for manufacturing the same according to the present invention include a plurality of tubes and seams on the outer diameter of the rotor having the same diameter as the maximum outer diameter of the rotating shaft and the same length as the maximum diameter part of the rotating shaft. In addition to machining the axial ventilation groove, the inner diameter of the shaft material is the same length as the total length of the rotating shaft, and the outer diameter of the shaft material is smaller than the diameter of the opposing valley of the IIL mosquito ventilation groove. It was designed so that

[For production]

In the rotor of 11 rotors and the method of manufacturing the rotor according to the present invention, the rotor is fitted into a bushy small-diameter shaft machined with an A-groove ft to form a rotating shaft.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. 41
In Fig. m5CiA, (4) is a bushing having the same diameter and the same length as the maximum diameter part of the rotating shaft (2), and the outer periphery has a plurality of axial ventilations - the same ventilation 5 (5) as in (3). ) is excavated, and the inner diameter part (67 is smaller in diameter than the diameter of the valley where the plurality of axial ventilation holes are opposed to each other.
A shaft member that is fitted in a predetermined position of the inner diameter part (6) of (4), the outer diameter part has the same diameter as the inner diameter part (6) of the bush (4), and the overall length is the same as that of the rotating shaft (2). The length is the same as the total length of. and,
A rotating shaft (2) is formed by the bush (4) and the shaft member (7).

Note that the other #1 is the same as the conventional one, so the explanation will be omitted.

Next, the operation will be explained. The bush (4) and shaft member 17) configured in this way operate and function in exactly the same way as the rotating shaft (2).

Therefore, there is no need to process a rotating shaft with a large diameter and long length to form cooling ventilation grooves, and there is no need for a large machine or a large lane for this purpose.

S1 In the above embodiment, the inner diameter of the bushing is circular, and the outer diameter of the shaft material that fits therein is also circular, but the parts that fit together may be square. It has a similar effect.

〔Effect of the invention〕

As described above, according to the present invention, a plurality of axial ventilation grooves are provided on the outer diameter of the bushing having the same diameter and the same length as the maximum diameter part of the rotating shaft, and the valleys where the plurality of axial ventilation grooves face each other are provided. The shaft material has a diameter smaller than that of the rotary shaft and has the same length as the total length of the rotary shaft, and it is configured to fit snugly into a predetermined position, so the rotary shaft can be machined with a small machine, a small crane is required, and it is inexpensive. There is an effect that can be achieved with.

[Brief explanation of drawings]

1 to 5 are diagrams showing a rotor of a rotary heavy machine according to an embodiment of the present invention and a method for manufacturing the same, and FIG. 1 is a sectional view taken along the line ■-■ of FIG. 2, which constitutes a rotating shaft; Figure 2 is a cross-sectional view taken along line I-I in Figure 1, Figure 3 is a cross-sectional view taken along line ■ to ■ of Bush, Figure 4 is a cross-sectional view taken along line m-m in Figure 3, and Figure 5 is a cross-sectional view taken along line II in Figure 1. A cross-sectional side view of the shaft material, FIGS. 6 and 7 are diagrams showing a rotor of a conventional rotating electrical machine and a method of manufacturing the same, and FIG. 6 is a cross-sectional side view of the rotating shaft, and FIGS.
The cross-sectional view taken along the line, FIG. 7, is within the cross-section taken along the line V+-Vt in FIG. In the figure, (1) is the rotor core, (2) is the rotating shaft, (
3) (May is the ventilation groove, (4) is the bushing, (sixth is the inner diameter of the bushing, and (7) is the shaft member. In the drawings, the same reference numerals indicate the same or equivalent parts.

Claims (2)

[Claims] (1) A rotor core stacked in the axial direction, the largest diameter part of which is fitted into the inner circumference of the rotor core, and a rotating shaft with a plurality of axial ventilation grooves drilled in the largest diameter part. In the rotor of a rotating electrical machine having a rotor, a plurality of axial ventilation grooves are provided on the outer diameter of the bush having the same diameter and the same length as the maximum diameter part of the rotating shaft, and a valley where one of the plurality of ventilation grooves faces the other. A rotor for a rotating electric machine, characterized in that the inner diameter of the bushing is fitted into a predetermined position on the outer diameter of a shaft member having a diameter smaller than the diameter of the bushing and having the same length as the entire length of the rotating shaft. (2) A plurality of axial ventilation grooves are machined on the outer diameter of a bushing having the same diameter and length as the maximum diameter of the rotating shaft, and a predetermined position of the shaft member having an outer diameter the same as the inner diameter of the bushing. A rotor for a rotating electrical machine and a method for manufacturing the same, characterized in that the bush is fitted into the rotor of a rotating electric machine.