JPS6377339A - Rotor for rotary electric machine - Google Patents

Abstract

PURPOSE:To obtain a rotor for a rotary electric machine capable of preventing the bending of a shaft by filling a section between an insulation provided on the drum section of rotor and a central ring with fillers. CONSTITUTION:A rotor winding 1 projected from the drum section of a rotor is held by a retaining ring 2, and an insulation 3 on the drum section of rotor is formed between the rotor winding 1 and the retaining ring 2 in order to insulate both the rotor winding and the retaining ring. The insulation 3 is divided into two in the circumferential direction, and assembled so that one end in the axial direction of the insulation 3 is oppositely faced to the end side of the copper section of the rotor and the other end to the side surface of a central ring 4 shaped at the axial end section of the retaining ring 2. A section between the insulation 3 and the central ring 4 is filled with fillers 6. Accordingly, the insulation 3 receiving the thermal elongation force of the rotor winding 1 uniformly pushes the central ring 4 through fillers 6, thus acquiring the rotor for a rotary electric machine capable of preventing the bending of a shaft.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a rotor for a rotating electric machine.

[Conventional technology]

In general, the end part of the rotor winding of the rotor of a turbine-powered Pi machine is as shown in Fig. 3. The rotor winding 1 protruding from the body of the first rotor is held by a retaining ring 2, and the end part of the rotor winding of the rotor of the first rotor is Winding 1
A body insulation 3 is provided between the body and the retaining ring 2 to insulate the two.1 The body insulation 3 is normally described in Fig. 4 and in Japanese Patent Publication No. 56-35108. It is divided into two parts in the circumferential direction as shown in FIG. Moreover, the inner surface of the trunk insulation 3 facing the rotor winding 1 is treated with a slippery material such as tetrafluoroethylene resin.

Therefore, it is difficult to improve rotor vibration caused by unbalanced thermal expansion in the circumferential direction of the rotor winding 1 due to frequent startup and stop operations of rotating electric machines, especially high-speed turbine generators. However, no consideration was given to the axial surface deflection of the rotor due to the thermal elongation of the rotor winding 1 in the axial direction.

[Problem that the invention seeks to solve]

The above-mentioned conventional technology does not take into consideration the thermal expansion of the rotor winding in the axial direction due to the operation of the electric machine.

Therefore, when the rotor winding expands due to heat, the body insulation is pulled by the rotor winding due to the centrifugal force of the rotor winding due to rotation.
In this case, if there is unevenness on the end face of the body insulation facing the center ring, the force that tends to move the body insulation will cause the unevenness of the center ring to move. You will be able to press a specific part. This causes the rotor to axially tilt, causing abnormal vibrations. This can be achieved by finishing the end face of the trunk insulation facing the central ring uniformly.
Even if the end face of the arc-shaped body insulation is made uniform individually, the surface with the center ring will not necessarily match depending on the state of assembly of the rotor winding when the body insulation is combined, so after assembling the 9 rotor windings. Combined with torso insulation.

After installing the central ring, it is necessary to check whether it is uniform. Processing after this combination is difficult, such as preventing foreign matter from entering the product and fixing the workpiece, and requires a great deal of time.

Furthermore, even if the body insulation moves under the thermal elongation force of the rotor winding, it is sufficient to ensure a sufficient distance between the body insulation and the center wire so that it does not hit the center ring.

To determine this spacing, consider thermal expansion of the rotor windings, variations in the axial length of the trunk insulation, variations in the assembly of the rotor windings and center ring, ensuring electrical spacing, etc. It is necessary to extend the retaining ring in the axial direction, which requires sufficient physical strength, and there are many problems such as considering 1 strength - H.

The present invention has been made in view of the above points, and it is an object of the present invention to provide a rotor for a rotating electrical machine that can prevent shaft surface deviation.

[Means for solving problems]

The above object is achieved by filling the gap between the trunk insulation and the central ring with a filler.

[Effect]

Since the filler is filled between the shelving insulation and the center ring, even if the finish of the end face of the shelving insulation is uneven, the filler makes the contact between the shelving insulation and the center ring uniform. As a result, the body insulation subjected to the thermal elongation force of the rotor winding presses the center ring evenly through the filler, and the rotor does not axially tilt.

〔Example〕

The present invention will be explained below based on the illustrated embodiments. An embodiment of the invention is shown in FIGS. 1 and 2. FIG. Note that parts that are the same as those in the conventional system are given the same reference numerals, and therefore their explanations will be omitted. As shown in the figure, the rotor winding 1 is attached to the rotor body 5. In this embodiment of the rotor constructed as described above, a filler 6 was filled between the trunk insulation 3 and the center ring 4. By doing this, the torso insulation 3
The filler 6 is filled between the center ring 4 and the copper cladding a3, which receives the thermal elongation force of the rotating pre-winding a1, so that it evenly presses the center ring 4 through the filler 6. Thus, it is possible to obtain a rotor for a rotating electrical machine that can prevent shaft warping.

That is, the gap created between the center ring 4 side edge of the body insulation 3 and the center ring 4 is filled with a filler 6, for example, a thermosetting resin, and the body insulation 3, the filler 6, and the filler 6 are bonded together. Make sure there is no gap between it and the center ring 4. By doing this, the body insulation 3, which is subjected to the axial thermal elongation force of the rotor winding 1 due to the operation of the electric machine, pushes the center ring 4 through the filler 6, and the center ring 4 It is now pressed with a uniform force, and the rotor's shaft surface is prevented. Since the shaft surface is prevented from running in this manner, it is possible to obtain a highly reliable rotor of a rotating electrical machine that does not generate abnormal vibrations.

〔Effect of the invention〕

As described above, the present invention prevents the rotor from running on its axis, making it possible to obtain a rotor for a rotating electrical machine that can prevent the shaft from running.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional side view of the rotor winding end portion of an embodiment of the rotor of a rotating electric machine of the present invention, Fig. 2 is an enlarged longitudinal sectional side view of the central ring side of Fig. 1, and Fig. 3 is a conventional FIG. 2 is an enlarged vertical cross-sectional side view of the central ring side of the rotor of the rotating electric machine. FIG. 4 is a perspective view of the trunk insulation of the rotor of the rotating electric machine. DESCRIPTION OF SYMBOLS 1... Rotor winding, 2... Holding ring, 3... Body tension insulation, 4... Central ring, 5... Rotor body, 6... Filler.

Claims (1)

[Claims] 1. A rotor winding that is attached to the rotor body and whose end protrudes from the body, a retaining ring that holds the end of the rotor winding, and an axial end of the retaining ring. In a rotor of a rotating electrical machine, the rotor is provided with a central ring provided at the center ring, and a body insulation provided between the retaining ring and the rotor winding, and a filler is provided between the body insulation and the center ring. A rotor for a rotating electrical machine characterized by being filled with.