JPS63240343A - Rotor for rotating electric machine - Google Patents

Abstract

PURPOSE:To facilitate disassemblage, assemblage, partial mending and repair, by arranging a supporting plate in the wide clearance between adjacent coils and by pressing down the end section of the coils with fastening members. CONSTITUTION:An upper coil 2A and a lower coil 2B at the end section 4 in single layer winding coming out of an iron core 1 are releasably supported to a nearly cylinder-shaped supporting member 6 fitted to a rotor spoke 5 through an insulating packing 7. A supporting plate 8A for an upper coil 2A and a supporting plate 8B for a lower coil 2B intersected with each coil and section are brought into contact with the upper coil 2A and a lower coil 2B at the coil end section. A through hole 9 is bored in both supporting plates 8A and 8B and the supporting member 6, aiming at the clearance in the rotor radial direction of each coil 2A and 2B. A bolt 10, a part of fastening members, is inserted into this through hole 9 and fastened with a nut 11.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a rotor for a rotating electric machine having an improved retaining structure for the rotor coil end.

(Prior Art) Research has been progressing to make the generator motor, which is the main engine of a pumped storage power plant, variable speed for pump operation and power generation operation. In particular, as an electric motor, a wound rotary electric machine in which a rotor is provided with multiphase windings is widely used because of its good starting characteristics and its suitability for frequent starting.

On the other hand, now [1] With the advancement of power electronics technology,
Variable speed control, which controls operation within a certain rotational speed range, has become possible, and its advantages have been applied to a variety of devices. In this case as well, it is necessary to use a cylindrical rotor structure with polyphase windings. The generator motor has a cylindrical rotor, and one coil is placed in one slot.
lt layer winding is attracting attention, but as shown in Figure 5, the upper and lower coils (2A) and (2n) coming out of the iron core (1)
The ends of each were supported separately with bind bands (G3). However, since the all-electric 9!11 machines at the pumped storage power plant have large capacity and large diameter, it would be ideal to transport the rotor as a complete product to the site, but it would be better to transport it in pieces. Increasingly, iron core loading and coil installation are carried out on-site. Therefore, in this case, binding work is required on-site, which requires a large-scale manufacturing process! 1 (Niro. Especially when using the main engine of a pumped storage power plant for power generation, the unrestrained speed (about 1.5 to 3.0 times the rated rotation speed) peculiar to hydraulic power plants)
Coil end (2A) to withstand.

Support for (2B) must be extremely strong.

In addition, when partially repairing the coil, it is necessary to attach and detach the bind band (■), which is also a large-scale construction work.

(Problems to be solved by the invention) As mentioned above, as rotating electric machines become larger, they must meet transportation restrictions and are easy to disassemble, assemble, and partially repair, regardless of whether or not a factory rotation test is performed. The structure must be such that it can be carried out.

In addition, with the increase in capacity, the upper and lower coils (2A) of one rotor
, (2jll) Since the dimensions of the end portion and the applied current increase, the acting centrifugal force and electromagnetic force become significantly larger. Moreover, since the rotational speed of the main engine reaches the unrestrained speed unique to hydraulic equipment, it must have a highly reliable structure that can tolerate such an extremely severe centrifugal force field.

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a rotor for a rotating electric machine, which is robust, highly reliable, and has improved ease of disassembly and assembly, and maintainability, and is particularly suitable for large-sized and large-capacity machines. be.

[Structure of the invention]

(Means for Solving the Problems) In order to achieve the above object, the present invention provides a support member that supports the inner circumferential side of the coil end of a rotor employing a single-layer coil, and upper and lower coils. The rotor coil end is held by a support plate that presses the outer circumferential side of each end so as to intersect with the coil end, and a fastening member that connects the support plate and the support member. The company provides rotors for rotating electric machines.

(Function) In a device configured in this way, since the rotor coil is wound in a single layer, it is easy to create an interval for cross-inserting the support plate with the end of the adjacent coil, thereby supporting the end of the coil. Because it is fixed with the parts, support plate, and fastening parts, it is strong and reliable, and it is easy to work on the installation site.In addition, when repairing a part of the coil, you only need to remove and attach the support plate locally. .

In addition, by controlling the torque for loosening and tightening of the fastening members, it becomes possible to arbitrarily inspect and adjust the restraining force at each rotor coil end.

(Examples) Example 1 Next, a first example of the present invention will be described with reference to FIGS. 1 and 2.

The upper coil (2
A) and the lower coil (2B) are supported by an approximately cylindrical support member 0 attached to a rotor spoke (2) via an insulating filling (2). The upper coil (2A) and the lower coil (2B) at the coil end are each connected with a support plate (8A) for the upper coil (2 people) that crosses each coil end through a filler ■, and a support plate for the lower coil (2). 2B) and the support plate (8B) for each coil (2A), (2B), aiming at the gap in the rotor radial direction, penetrate both support plates (8A), (8B) and the support member (0). Drill a hole (9). Pass a bolt (10), which is part of the fastening member, through this through hole 〇, and tighten it with a nut (11), which is part of the fastening member.

In this way, when a single-layer coil is used, the number of coils can be relatively reduced compared to a two-layer coil.
It is possible to secure a space between the coil ends (4) without excessively extending the length of the coil ends (4). Utilizing this space, the rotor upper coil (2A) and the lower rotor coil (
The ends of 2B) can be fixed. Therefore, it is easy to assemble at the installation site, and partial repairs can be made by removing only the support plates (8A) and (8B) for that part.

Example 2 A second example is shown in FIG. In this case, an upper coil support plate (8A) and a lower coil support plate (8B) are supported by the same bolt (10). and Pol 1-(1
0) is provided not only at the ends of both support plates (8A) and (8[1) but also at the middle part.

In this way, the bolt (10) can be simply threaded long enough to allow the nut (11) to reach the lower coil support plate (8B), and the structure is [111], which has the advantage of increasing the strength to hold down the coil. In addition, the same effects as in Example 1 can be obtained.

Example 3 A third example is shown in FIG. This is done by connecting the ends of the upper coil support plate (8A) and the lower coil support plate (8B) shown in Figure 2 with the connection support FJ (8C). ) is omitted, and only short bolts (10) are used.

In this way, the configuration can be simplified and the tightening adjustment of the nut (11) can be performed more easily.

〔Effect of the invention〕

According to the present invention, a single-layer coil is used, a support plate is placed in a wide gap between adjacent coils, and the ends of the coil are held down by a fastening member, so that the coil is strong and reliable.
Disassembly 2 Assembly is easy, and if the support plate is partially disassembled, it is easy to replace that part, improving maintainability, especially for rotors of rotating electric machines that are compatible with large and large capacity machines. Can be provided.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a main part showing a first embodiment of the present invention, FIG. 2 is a developed plan view of the coil end shown in FIG. 1, viewed from the outer periphery;
FIG. 3 is a plan development view of the second embodiment as seen from the outer periphery of the coil end, FIG. 4 is a vertical sectional view of the main part of the third embodiment, and FIG. 5 is the main part of the conventional example. FIG. 2A...upper coil, 2B...lower coil,
4... Coil end, 6... Support member, 8A.
...Support plate for upper coil, 8B...Support plate for lower coil. 8C...Connection support plate, 9...Through hole, 10.
...A bolt that is part of a fastening member. 11... A nut that is a part of the fastening member.

Claims (1)

[Claims] A support member that supports the inner periphery of the coil end of a rotor employing a single-layer coil; a support plate that presses the outer periphery of the upper and lower coil ends by intersecting with the coil end; and the support. A rotor for a rotating electrical machine, comprising a fastening member that connects a plate and a support member to hold an end of a rotor coil.