JPS608618B2 - Power reactor winding fixing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a winding fixing device for a power reactor.

A conventional winding fixing device for a power reactor will be explained with reference to FIGS. 1 to 7.

Reference numeral 3 designates an insulating tube for winding, and a plurality of linear spacers 13 are arranged at equal intervals on the outer periphery of the insulating tube 3 for winding. Upper insulating ring 4 at the top and bottom of
, upper winding insulator 8 with lower insulating ring 5 interposed therebetween.
, an insulating tube 9 with a lower winding cord is provided.

A plurality of winding support insulating columns 10 are arranged inside the winding insulating cylinder 3 in contact with the inner periphery thereof, and the upper and lower ends of the winding supporting insulating columns 10 are provided with upper and lower winding cord attached insulating plates 8. , 9 is fixed with iron into a hole 16 (see FIG. 6) for an insulating support column. Reference numeral 2 denotes a magnetically shielding iron core that covers two of the upper and lower end surfaces and the outer peripheral surface of the winding 1, and is firmly fixed by an upper fastener 6, a lower fastener 7, and a core vertical bolt 181. The lower connecting fitting 7 is fixed to the iron core stand 12 with mounting bolts 15.

The winding 1 surrounded by the magnetic shielding core 2 is fixed from above via the upper winding tightening insulating plate 8 and the upper insulating ring 4 by tightening the tightening bolt 11 provided on the upper fastener 6. ing. The tightening bolt 11 has a dish-shaped tightening seat surface and a protrusion 19 on the lower surface of the bolt to reduce the tightening surface pressure applied to the upper winding cotton-attached insulating plate 8 to tighten the upper winding. It is fixed with iron in a fixing hole 17 (see FIGS. 6 and 7) of the insulating plate 8. Furthermore, a fixing bolt 14 provided on the lower fastener 7 is inserted into a fixing hole 17 of the lower winding tightening insulating plate 9 and fixed. Since the reactor winding fixing device is configured in this way, the horizontal excitation force applied to the winding 1 is transferred to the winding support whose upper and lower ends are fixed via the spacer 13 and the winding insulating tube 3. It is held by the insulating pillar 10 and can prevent the reactor winding from shifting laterally during transportation.

However, in the conventional structure described above, the lower plate 6A of the upper fastener 6 and the upper plate 7A of the lower fastener 7 are provided substantially on the same plane as the inner surface of the window of the magnetic shielding core 2.

Therefore, as the unit capacity of the power reactor increases, the stray loss due to leakage magnetic flux interlinking with the lower plate 6A of the upper fastener 6 and the upper plate 7A of the lower fastener 7, which are close to the winding 1, increases. This has become a problem. Furthermore, it has become necessary to adjust the electric field strength at the tip of the protruding portion of the bolt 11 and the fixing bolt 14 due to the ultra-high voltage of the power reactor. The object of the present invention is to reduce the sag loss at the lower part of the upper fastener and the upper part of the lower fastener, and to reduce the protrusion of a tightening bolt and the lower fastener for fixing an insulating plate with upper winding cotton to the upper fastener. An object of the present invention is to provide a winding fixing device for a power reactor that can alleviate the electric field at the tip of a fixing bolt that fixes a lower winding cotton-covered insulating plate.

The winding fixing device for a power reactor of the present invention includes a winding bag wrapped on a plurality of spacers disposed in contact with the outer periphery of a winding insulating cylinder, and a winding on the upper and lower end surfaces of the winding. A magnetic shielding core arranged on two opposing sides of the outer circumferential surface, upper and lower winding fastening insulating plates arranged on the upper and lower end surfaces of the winding, and arranged in contact with the inner periphery of the insulating cylinder for the winding. A plurality of winding support insulating columns are installed and fixed at their upper and lower ends with iron into the holes of the upper and lower winding clamping insulating plates, and upper and lower fasteners and upper and lower windings that fix the upper and lower magnetic shielding cores are installed. bolts for fixing the wire clamping insulating plate, and fixing notches provided on the upper surface outside the window of the upper winding clamping insulating plate and the lower surface outside the window of the lower winding clamping insulating plate;
A fixing insulating plate having holes for inserting the bolts and having iron inserted into each fixing notch, and the bolts to which the winding tightening insulating plate inserted into the insertion holes of the fixing insulating plate are fixed. The upper and lower fasteners are each provided with fixing fittings that are fixed to the upper and lower fasteners.

An embodiment of the winding fixing device for a power reactor according to the present invention will be described below with reference to FIGS. 8 to 12, with the same parts as those in the prior art designated by the same reference numerals and explanations of the same parts omitted.

At both ends of the magnetic shielding core 2 of the upper winding vertically attached insulating plate 8 and the lower winding cotton insulating plate 9 protruding outside the window, a 10th
As shown in FIG. 11, fixing insulating plates 20 and 21 having a predetermined height shown in FIG. 9 are provided with fixing notches 22 for iron fitting. And the fixing insulating plate 20,
21 is provided with an insertion hole 24 for inserting the tightening bolt 11 or the fixing bolt 14. On the other hand, the upper and lower fasteners 6
, 7 have fixing notches 2 for the upper and lower winding tightening insulating plates 8 and 9.
Fixing metal fittings 23 for fixing the fixing bolts 11 and fixing bolts 14 inserted into the fixing insulating plates 20, 211, which are attached to the fixing insulating plates 20 and 211 by iron fitting, are fixed. Then, fix the tightening bolts 11 and fixing bolts 14 to the fixing fittings 23 fixed to the upper and lower fittings 6 and 7, respectively, and
The winding 1 is fixed by fixing the upper and lower winding tightening insulating plates 8 and 9 via the fixing insulating plates 20 and 21 with fixing bolts 14. The winding fixing device for the power reactor of this embodiment is constructed in this way, and the upper and lower fittings 6
, 7, the height of the fixing metal fittings 23 fixed to each of the fixing insulating plates 20, 7 is significantly larger than the inner surface of the window of the magnetic shielding core 2, except for the depth at which each fixing insulating plate 20, 21 is inserted into the fixing notch 22. This means that they are separated from each other, and also away from the end of the winding 1.

Therefore, the amount of leakage magnetic flux interlinking with the fixing fittings 23, 23 of the upper and lower fastening fittings 6, 7 is also reduced, making it possible to significantly reduce stray loss. In addition, by being moved away from the end of the winding 1, the electric field strength at the protrusion of the bolt 11 and the tip of the fixing bolt 14 can be significantly reduced. As described above, the winding fixing device for a power reactor according to the present invention includes a fixing insulating plate that is inserted into the fixing notch provided in the upper and lower winding tightening insulating plates and is attached so as not to rotate. is fixed via the tightening bolt and fixing bolt attached to the fixing bracket, which is fixed at a position farther from the winding than the lower plate and upper plate of the conventional upper and lower fasteners. This has the effect of significantly reducing stray loss in the lower part of the upper fastener and the upper part of the lower fastener.

Also, it has the effect of relaxing the electric field at the protrusion of the tightening bolt that fixes the upper winding tightening insulating plate to the upper fastener and the tip of the fixing bolt that fixes the lower winding tightening insulating plate to the lower fastener. It is.

[Brief explanation of the drawing]

Figure 1 is a plan view of a winding fixing device for a subordinate power reactor, Figure 2 is a front view of Figure 1, and Figure 3 is m-m of Figure 1.
Fig. 4 is a plan view of the winding support insulating column shown in Fig. 3, Fig. 5 is a right side view of Fig. 4, and Fig. 6 is an enlarged view of the winding tightening insulating plate shown in Fig. 3. Plan view, Figure 7 is an enlarged view of part A in Figure 3,
8 is a front view of an embodiment of the power reactor winding fixing device of the present invention, FIG. 9 is a plan view of the fixing insulating plate shown in FIG. 8, and FIG. 10 is a winding tightening device shown in FIG. 8. Top view of the attached insulating plate, 1st
1 is a sectional view taken along the line-M arrow in FIG. 10, and FIG. 12 is a sectional view of a main part of the winding fixing device shown in FIG. 8. 1... Winding wire, 2... Magnetic shielding core, 3
...Insulating tube for winding, 6...Top clamp, 7
...Lower vertical bracket, 8...Upper winding tightening insulating plate, 9...Lower winding tightening insulating plate, 10...
・・Winding support insulating column, 11 ・・・Bolt with bolt, 1
3...Surface, 14...Fixing bolt, 16...Hole for insulation support pillar, 20, 21...
・Fixing insulating plate, 22...Fixing notch, 23...
...Fixing bracket, 24...Insertion hole. Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 8 Figure 8 Group diagram Group lo diagram Figure 11 Figure 12

Claims (1)

[Claims] 1. A winding wound on a plurality of spacers arranged in contact with the outer periphery of an insulating cylinder for winding, and magnetic shielding arranged on two opposing sides of the upper and lower end surfaces and outer peripheral surface of the winding. An iron core, upper and lower winding fastening insulating plates arranged on the upper and lower end surfaces of the winding, and upper and lower winding fastening insulating plates arranged in contact with the inner periphery of the winding insulating cylinder and tightening the upper and lower windings at the upper and lower ends, respectively. A device comprising a plurality of winding support insulating columns fitted and fixed into holes in an insulating plate, upper and lower fasteners for fixing the upper and lower magnetic shielding cores, and bolts for fixing the upper and lower winding fastening insulating plates. The upper winding tightening insulating plate has fixing notches provided on the upper surface outside the window of the upper winding tightening insulating plate and the lower surface outside the window of the lower winding tightening insulating plate, respectively, and holes for inserting the bolts, respectively. A fixing insulating plate that is inserted into the fixing notch and the bolts that are inserted into the insertion holes of the fixing insulating plate and fixing the winding tightening insulating plate are fixed to the upper and lower fasteners, respectively. A winding fixing device for a power reactor, characterized in that it is provided with a fixing metal fitting.