JPH0799917B2 - Rotor winding end support device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an improvement of a support device for a rotor winding end of a high-speed and large-capacity rotary electric machine, for example.

[Conventional technology]

FIG. 7 is a cross-sectional view showing a conventional rotor winding end supporting device disclosed in, for example, Japanese Patent Laid-Open No. 63-64544. In the figure, (1aa) is an upper winding end portion of a plurality of rotor winding end portions protruding from a rotor core end portion (not shown), and a predetermined ground insulation is provided by combining insulated copper element wires. It has been subjected. (2) is an I-shaped inter-winding support member arranged between a plurality of upper winding end portions (1aa), (3) and (4) are located above and below the upper winding end portion (1). The disposed insulator is a lower part of the insulator (4) and has a first bind wire and an insulator (not shown), and an I-shaped winding is formed in the same manner as the upper winding end (1). A lower winding end portion (not shown) is sandwiched between the wire support members, and a winding support ring (not shown) arranged below the lower winding end portion is provided with the first bind wire and the second bind wire. The binding wire (5) is wound around the upper and lower winding ends to be supported by tightening.

[Problems to be Solved by the Invention]

In the conventional rotor winding end supporting device, since the inter-winding supporting member is I-shaped and is not in contact with the side surface of the rotor winding, thermal expansion of the rotor winding end is restricted. In addition, a ventilation passage is formed and the winding is cooled, but since the entire side surface of the rotor winding end does not contact the inter-winding support member, it is expected to have a protective effect on the mechanical strength of the above side surface. In particular, in a high-speed and large-capacity rotating electric machine, the strength against the circumferential expansion during operation and the tightening force at the bind wire is insufficient,
The ground insulation at the rotor winding ends is damaged. When inserting the I-shaped inter-winding support member between the rotor winding end portions, if there is some irregularity in the outer shape of the rotor winding end portion, the inter-winding support member cannot be inserted and the winding The inter-winding support member must be reprocessed according to its shape, and the inter-winding support member must be adhered to the insulator with an adhesive or fixed to the rotor winding end portion with a string or the like. As a result, there is a problem in that the fixing of the inter-winding support member is complicated and takes a lot of time.

The present invention has been made to solve the above problems, and even if the outer shape of the rotor winding end portion is not uniform,
The inter-winding support member can be easily inserted between the rotor winding end portions, is easily fixed, and has a protective effect on the mechanical strength of the rotor winding end portion. The purpose is to obtain a support device.

[Means for Solving the Problems]

The rotor winding end supporting device according to the present invention includes an interwinding supporting member having a cross-shaped basic structure between a plurality of rotor winding ends, and a thermosetting resin that is cured at room temperature or by heating. It is arranged via a flexible insulating member that is impregnated.

[Action]

The rotor winding end supporting device according to the present invention is an inter-winding supporting member having a cruciform basic structure via a flexible insulating member formed by impregnating a side surface of the rotor winding end with a thermosetting resin. Since it is supported by both end faces, the side faces of the rotor winding ends are mechanically supported with strength, and when the interwinding support member is inserted between the rotor winding ends, the rotor winding ends are inserted. Even if there is a wide or narrow portion between the rotor winding end portions due to irregularities in the outer shape of the rotor, the flexible member is deformed in response to the wide or narrow portion, and the wide or narrow portion is absorbed, and the interwinding support member is re-installed. It can be inserted between the rotor winding ends without processing, and the inter-winding support device is fixed in place by hardening the thermosetting resin, and the rotor winding end spacing is adjusted to an appropriate interval. Supported.

〔Example〕

A sectional view showing an embodiment of the present invention shown in FIG.
And FIG. 2 which shows the II-II cross section of FIG. 1 is demonstrated. In these drawings, (1) is a plurality of rotor windings mounted in the slots of the rotor core (6), which are provided with predetermined ground insulation by combining insulated copper element wires. (1
a) is a plurality of rotor winding ends protruding from the end of the rotor core (6), (1aa) is its upper winding end, (1ab)
Is a lower winding end of the rotor, and (7) is a ring-shaped winding support disposed on the inner peripheral side of the rotor winding end (1a). It is fixed to the projecting support (8). (9) is a thermosetting resin such as epoxy, silicon or unsaturated polyester which is cured at room temperature for 2 to 30 days or is heated with inorganic powder such as silica, calcium carbonate or talc. 50-2 for 100 parts by weight
A protective insulating member formed by wrapping a composition (9a) kneaded with 00 parts by weight into a woven cloth (9b) obtained by processing glass fibers or polyester fibers by a method such as plain weave or twill weave, and forming a rotor winding end (1a). And (10a) and (10b) are arranged between the upper winding end portions (1aa) of the plurality of rotor winding end portions (1a) and below the winding support member (7). An inter-winding support member having a predetermined length, which is disposed between the winding end portions (1ab) and extends in the longitudinal direction of the lower and upper winding end portions (1aa) (1ab),
The cross-sectional shape is cruciform, and the width (A) is slightly smaller than the space between the rotor winding ends (1a).
It is formed about 2 mm smaller. This inter-winding support member (1
0a) (10b) is a thermosetting resin that cures at room temperature or heat such as epoxy, silicone, unsaturated polyester, etc., and is mixed with a laminated plate made of glass fiber as a base material or a part of inorganic powder such as a sheet mold compound. It is formed by a laminated plate. (11) and (12) are protective insulating members that cover the first and second bind wires (13) and (14), and these protective insulating members (11) and (12) are the same as the protective insulating member (9). Thermosetting resin such as epoxy, silicone, unsaturated polyester, etc., which cures at room temperature for 2 to 30 days, or which is cured by heating, inorganic powder such as silica, calcium carbonate, talc, 100 weight% of the thermosetting resin 5 for department
The composition (11a) (12a) kneaded with 0 to 200 parts by weight is wrapped with a woven fabric (11b) (12b) obtained by processing glass fibers or polyester fibers by a method such as plain weave or twill weave.
(15) is a flexible insulating member made of fibrous base material such as polyester felt or glass sheet, and is
Spacers that are impregnated with thermosetting resin such as epoxy, silicon, unsaturated polyester, etc. that cures or heats for 30 days. These are the side surfaces (10aa) (10ba) (10ba) (10ba) (10ba) of the inter-winding support members (10a) (10b). ) Is wound around. A plurality of inter-winding support members (10b, each having a plurality of lower winding end portions (1ab ) Is inserted at a predetermined interval in the longitudinal direction of the winding, and the composition (11a) is uncured by the second binding wire (13) and the lower winding is wound via a flexible protective insulator (11). Tighten the wire end (1ab) and the outer circumference of the winding support (7) and then the upper wire end (1a).
Between a), a plurality of inter-winding support members (10a), in which spacers (15) in a state where the thermosetting resin is uncured and have flexibility are attached to the side surfaces (10aa), are installed in the longitudinal direction of the windings. Insert with a predetermined interval, and composition (12a) with the first binding line (14)
Through uncured and flexible protective insulation (12)
As shown in FIG. 2 and FIG. 2, the winding support (7) is clamped and fixed. When the interwinding support members (10a) (10b) are inserted between the upper and lower winding ends (1aa) (1ab), the thermosetting resin impregnated in the spacer (15) is still cured as described above. Since the spacer (15) is not flexible, the upper and lower winding end portions (1aa) (1ab) may not be aligned due to irregularities in the upper and lower winding end portions (1aa) (1ab). ) Even if a wide or narrow portion occurs between them, it is deformed as shown in FIG. 3 according to the wide or narrow portion, so that it can be easily inserted without machining as in the conventional case, and the interwinding support member (10a) Side of (10b) (10a
a) and (10ab) are closely attached to the upper and lower winding end portions (1aa) and (1ab) side faces via the spacer (15), and are joined by hardening the thermosetting resin. The first and second bind wires (13) (14)
As shown in FIG. 3, the upper winding end portion (1aa) and the interwinding support member (10a) are fastened to the protective insulating member (12), and the lower end portion is tightened to the protective insulating member (11). Embedded in, and bonded by curing the compositions (11a) (12a). Further, the inter-winding support member (10b) arranged between the lower winding end (1ab) and the lower winding end (1ab).
The upper end of the composition is supported by the protective insulating member (11) and the lower end is supported by being embedded in the protective insulating member (9).
It is joined by hardening of (11a).

In the above embodiment, the protective insulating member (9) (11) (12)
As the composition (9a) (11a) (12a) constituting the above, a thermosetting resin that is hardened at room temperature or by heating and kneaded with an inorganic powder such as silica, calcium carbonate, or talc is described, but not limited to this. The thermosetting resin may be impregnated into a felt base material made of polyester fiber and having a thickness of about 05 to 10 mm, and in this case, 200 to 700 parts by weight relative to the thermosetting resin felt-like base material. Is preferred. Also, as the inter-winding support member (10a) (10b),
As shown in FIG. 6 without forming the horizontal plate integrally, a notch is formed in the substantially central portion of two plate members made of a laminated plate having a glass fiber as a substrate in thermosetting resin and combined in a cross shape. Alternatively, the combined portion may be adhered with an epoxy adhesive. Furthermore, as the inter-winding support members (10a) and (10b), the cross-sectional shape is described, but the cross-sectional shape is not limited to this, and any cross-shaped basic structure may be used.
For example, as shown in FIG. 4, the end surface of each end may be widened, or as shown in FIG. 5, a swastika shape may be used. Furthermore, the length of the inter-winding support member (10) is 30 to
It may be 100 mm, and a large number of pieces having the same cross-sectional shape may be arranged, or those having different cross-sectional shapes having a cross shape as a basic structure may be mixed without using the same shape. Further, the horizontal plate forming the cross is not necessarily arranged at the center of the vertical plate, but may be shifted upward or downward from the center. Further, it is also possible to mix up and down-shifted ones. In this case, as in the case of mixing different cross-sectional shapes, the inter-winding support members (10a) (10b) and the rotor windings are mixed. Turbulence is formed in the airflow passing through the ventilation passage formed by the gap formed with the end portion (1a), and the cooling effect of the rotor winding end portion (1a) is enhanced.

〔The invention's effect〕

As described above, according to the present invention, the inter-winding support member having a cross-shaped basic structure is arranged between the rotor winding end portions via the spacer formed by impregnating the flexible insulating member with the thermoplastic resin. Since it is installed, the inter-winding support member can be easily inserted even if there is a wide or narrow gap between the rotor winding end portions, which is excellent in workability, and the side surface of the inter-winding support member can rotate. The rotor winding end is mechanically firmly supported by the inter-winding support member by being closely adhered to the side surface of the sub-winding end via the spacer, and the inter-winding support member has a cruciform basic structure. Therefore, the ventilation passage is formed, and the rotor winding end portion is effectively cooled by the cooling air flowing through the ventilation passage.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, FIG. 2 is a sectional view taken along line II-II of FIG. 1, and FIG. 3 is a detailed view of an arrangement state of inter-winding support members shown in FIG. Sectional views showing FIG. 4, FIG. 5 and FIG.
FIG. 6 is a sectional view showing another embodiment of the present invention, FIG. 6 is a perspective view showing another embodiment of the present invention, and FIG. 7 is a sectional view showing a conventional rotor winding end supporting device. is there. In the figure, (1a) is the rotor winding end, (1aa) is the upper winding end, (1ab) is the lower winding end, (6) is the rotor core, and (7) is the winding receiver. Members, (10a) and (10b) are inter-winding support members, (13) and (14) are first and second bind wires, and (15)
Is a spacer. In the drawings, the same reference numerals indicate the same or corresponding parts.

Claims (1)

[Claims] 1. A cross shape is basically used in a structure in which a plurality of rotor winding ends protruding from the rotor core end are supported by a winding receiving member provided at the rotor core end. The inter-winding support member having a structure is arranged between the plurality of rotor winding ends through a spacer made by impregnating a flexible insulating member with a thermosetting resin that cures at room temperature or by heating. Characteristic rotor winding end support device.