JPS6041803Y2 - rotor of rotating electric machine - Google Patents

Description

[Detailed Description of the Invention] [Technical Field of the Invention] The present invention relates to a rotor of a rotating electric machine having a thrust duct.

[Technical background of the invention and its problems]

A rotor having a thrust duct in a conventional rotating electric machine is shown in FIGS. 1 and 2.

As shown in the cross-sectional view of the thrust duct section in FIG. 2, the iron core 1, which forms the main part of the rotor, has a disk-like overall shape, and has a shaft hole in the center that matches the rotor shaft 2. 3. Thin iron plates 1a with a plurality of slot grooves 4 arranged on the outer periphery and air holes 5 arranged between the slot grooves 4 around the shaft hole 3 are laminated to a desired thickness, and are radially formed in some places. It is configured to sandwich the arranged thrust plates 6 to form a thrust duct.

Reference numerals 7 and 7 denote core holders, which are cylindrical in shape and have an axial through hole 8 that coincides with the air hole 5, and are arranged so as to sandwich and fix the core 1 from both sides of the core 1.

A coil 9 is housed in each of the slot grooves 4 of the iron core 1.

Each coil 9 is connected on both sides of the iron core 1, and a bind tape 1o is wrapped around the outer surface of the coil 9.

Further, the gap between the slot groove 4 and the coil 9 and the gap between the coils on both sides of the coil 9 are filled with resin 11 so as to be firmly fixed.

When the rotor configured in this manner rotates, air flows into the air holes 5 in the axial direction, and air is blown out from the thrust duct between the thrust plates 6 in the centrifugal direction.

Next, filling with the resin 11 will be explained.

FIG. 3 shows a resin filling method for a rotor without a thrust duct.

The configuration of the iron core 1 is exactly the same except that there is no thrust duct.

The rotor shaft 2 is erected vertically, a sheet 13 is wrapped around the outer periphery of the iron core 1 and the coils 9 on both sides, the lower end of the sheet 13 is sealed, and the resin 11 is poured from the upper end opening of the sheet 13 and solidified.

Therefore, the gap between the coil 9 and the slot groove 4, the coils 9 on both sides
The gaps between the rotors are completely filled with resin, creating a rotor that is mechanically strong and highly insulating.

FIG. 4 shows a method of filling a rotor with a thrust duct with resin.

If the resin is poured in the same manner as described above, there is a problem that the thrust duct causes the resin to flow into the air holes 5 and block them.

Even if the outer periphery of the thrust duct is sealed, resin flows into the thrust duct through the gap between the slot groove 4 and the coil 9.

Therefore, the lower end of the sheet 13 is not sealed, and the resin poured from above is immediately flowed down to reduce leakage into the thrust duct as much as possible.

However, in this case, the resin filling is insufficient and the mechanical insulation is weak.

Furthermore, this conventional thrust duct configuration has the disadvantage that the iron core 1 is assembled while inserting the thrust plates 4 radially, resulting in extremely poor workability.

[Purpose of invention]

An object of the present invention is to provide a rotor for a rotating electrical machine that improves the configuration of the conventional thrust duct as described above and eliminates its drawbacks.

[Summary of the idea]

The rotor of the rotating electric machine of the present invention has an iron core in which disc-shaped thin plates are laminated to a required thickness, each having a shaft hole in the center, a plurality of slot grooves on the outer periphery, and an air hole between the shaft hole and the slot grooves, and the above-mentioned iron core. The rotor shaft is made by laminating disk-shaped thin plates to the required thickness, each having a shaft hole and slot groove corresponding to the shaft hole and slot groove provided in the rotor shaft, and a thrust duct groove extending from the air hole to the outer periphery. The iron cores are attached alternately to each other, and the cores are fixed together using a resin material.

[Example of idea]

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

In FIG. 5, the rotor of the rotating electric machine according to the present invention includes an iron core 1 and a thrust duct portion iron core 1'.

The iron core 1 is the same as the iron core provided in the rotor of a conventional rotating electric machine.

That is, the iron core 1 has a disk-like overall shape, with a shaft hole 3 in the center.
It is constructed by laminating thin plates having slot grooves 4 and air holes 5 on the outer periphery to a desired thickness.

As shown in FIGS. 6 and 7, the iron core 1' of the thrust duct section is constructed by laminating the above-mentioned thin plates with thrust duct grooves 14 formed from the air hole to the outer periphery.

Then, alternately stack iron core 1 and iron core 1', and
Fix it to one body.

The coil 9 is housed in the slot groove 4, the air hole 5 penetrates in the axial direction, and the thrust duct 15 radiates from the hole in the centrifugal direction.

FIG. 8 shows the resin filling method.

The outer end of thrust duct 15 of iron core 1' is sealed, and iron core 1
, 1' and the outer periphery of the coil 9 protruding from both ends.
3 is rolled up and stood up so that the axis is vertical, the lower end of the sheet 13 is sealed, and the resin liquid is poured from the upper end of the sheet 13.

The resin liquid flows down, fills the gap between the slot groove 4 and the fill 9, and the gap between the coils 9.9, and solidifies.

Since the slot groove 4 completely passes through the cores 1 and 1' as a single groove and is isolated from the thrust duct 15, resin cannot enter into the thrust duct 15 and the air hole 5.

Therefore, the gap between the thrust duct 4 and the coil 9 and the space between the coils 9 protruding on both sides can be completely filled with resin, resulting in a mechanically and insulatively strong rotor.

In addition, the iron cores 1, 1' can be assembled by simply laminating thin plates over the entire length, and workability is extremely high.

[Effect of idea]

As described above, the rotor of the rotating electrical machine of the present invention has a thrust duct section made of a laminated body of thin plates, which is easy to assemble, and can be filled with resin more reliably than conventional ones. Therefore, the mechanical strength of the rotor is superior, and the insulation reliability is improved.

[Brief explanation of drawings]

FIG. 1 is a vertical cross-sectional view of a conventional rotor, FIG. 2 is a cross-sectional side view of the thrust duct section, and FIG. 3 is a vertical cross-sectional view showing a method of filling resin in a conventional rotor without a thrust duct. Fig. 4 is a longitudinal sectional view showing the resin filling method for the rotor shown in Fig. 1, Fig. 5 is a longitudinal sectional view of the rotor according to the present invention, Fig. 6 is a cross-sectional side view of the thrust duct section, and Fig. 7 is FIG. 8 is a diagram showing the shape of the thin plate having the same thrust duct groove, and FIG. 8 is a diagram showing a method of filling the rotor with resin. 1...Iron core, 2...Rotor shaft, 3...
...Shaft hole, 4...Slot groove, 5...
...Air hole, 7... Core holder, 9... Coil, 11... Resin, 13... Sheet, 1'... Core , 14... Thrust duct groove, 15... Thrust duct.

Claims (1)

[Scope of utility model registration request] Compatible with an iron core that has a shaft hole in the center, multiple slot grooves on the outer periphery, and air holes between the shaft hole and slot grooves, laminated to the required thickness, and the shaft hole and slot grooves provided in the above iron core. An iron core in which disc-shaped thin plates having a shaft hole and a slot groove and a thrust duct groove extending from the air hole to the outer periphery are laminated to the required thickness is installed alternately on the rotor shaft,
A rotor for a rotating electric machine characterized by having iron cores fixed to each other with a resin material.