JPS59121809A - Core supporting method - Google Patents

Abstract

PURPOSE:To fix and support a core without producing a straing caused by tightening by a method wherein a specific shape is given to the cross section of an upper end frame and a lower end frame and an upper part and a lower part of the core are inserted into each frame respectively and the core is positioned and fixed to the vertical direction by coupling a core tightening band with a core frame by bolts. CONSTITUTION:An upper end frame 11 and a lower end frame 12 have the cross sections of U-shape with wings and four oval bolt holes are drilled at their bottoms with a certain interval and each wing portion 13, 13, which is to be the coil supporting part, is facing each other and both end portions are coupled together by a left end frame 14 and a right end frame 15. Bolt stands 17, 17 are protruded from a core tightening band 16 along with an ear metal 3 and the band 16 is lapped around a core 1 in such a manner that the bolt stands 17, 17 are positioned at the top and the bottom of the core 1. The upper part and the lower part of the core 1 are inserted into the upper end frame 11 and the lower end frame 12 tightly with cushioning material 18 between the core and the frame and the core 1 is fixed to the core frame by the fixing bolts 19, 19. The fixing bolts 19, 19 fix the core tightening band 16.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for supporting an iron core. □ Figures 1 and 2 show the conventional structure of a three-phase transformer body using a wound core made of multi-layered ultra-thin steel plates. In both figures,
1 is an iron core, 2 is an iron core tightening band that tightens this iron core from the outside in the lamination direction, 3 is a lug welded to this iron core tightening band, 4 is a coil, 5 and 6 are an upper end frame and Lower end frames 7 and 8 are core support fittings welded to both end frames 5 and 6, respectively, and 9 and 10 are tightening bolts. The iron core 1 is tightened in the stacking direction via the core tightening band 2 by turning the pin 3a of the upper lug 3, and then the upper end frames 5, 5 and the lower end frame are tightened via the core support 7.8. 6.6, and tighten both end frames vertically with the tightening bolts 9 and both end frames horizontally with the tightening bolts 10 to tighten between the upper end frames 5, 5 and the lower end frames 6, 6. Attach and fix.

In this core support structure, the core 1 is fixed in the width direction with the tightening bolt 9, and the tightening bolt 1 is fixed through the core support fittings 7, 8.
Since the core 1 is fixed in the vertical direction at 0, force is applied to the core 1 itself when tightening in the vertical and width directions, causing distortion and deteriorating the core characteristics.In addition, the arc-shaped core support bracket 7
．． Since the coil 8 is fixed, there is a drawback that it is difficult to improve the accuracy of the core circle in the area surrounded by the coil 4.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional technology.The upper end frame and the lower end frame are made hole-shaped in cross section, and the upper and lower parts of the iron core are fitted into them, respectively, and the iron core tightening band is attached to the core frame. By connecting the core with bolts, the core is positioned and fixed in the vertical direction, and by using a cushioning material to elastically fix the core in the width direction, the core can be tightened without causing distortion. An object of the present invention is to provide an iron core support method that can fixedly support the iron core and improve the iron core circular accuracy.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings. An upper end frame and a lower end frame, together with a left end frame 14 and a right end frame 15, form an iron core frame. Upper end frame 11 and lower end frame 12
has a hole-shaped cross-section, and at the bottom there are ＼4
Oval bolt holes (not shown) are drilled therein, and the wing parts 13 and 13, which serve as coil holding parts, face each other and are connected at both ends by a left end frame 14 and a right end frame 15. The core tightening band 16 has a lug 3 and a screw seat 17.
17 is provided in a protruding manner and is wound around the iron core 1 so that the screw seats 17 and 17 are located at the top and bottom of the iron core 1, respectively. The upper and lower parts of the iron core 1 are tightly fitted into an upper end frame 11 and a lower end frame 12 with a cushioning material 18 interposed therebetween, and are fixed to the above-mentioned iron core frame by fixing poles 19 and 19. . Fixing bolt 19.19 is the upper end frame 1
1 and the lower end frame 12 through the bolt holes (not shown) and screwed into the screw seats 17 and 17 to fix the core tightening band 16. The left end frame 14 and the right end frame 15 have their upper and lower ends inserted into the upper end frame 11 and the lower end frame 12, respectively, and are connected by connecting bolts 20. Kunjong material 21.21 is interposed between 1 and 2 under compressive force. 22 is a pace frame.

In this embodiment, since the bolt holes (not shown) in the upper end frame 11 and the lower end frame 12 are oval holes, the degree of freedom in positioning the iron core 1 can be increased.

Although the above-mentioned embodiment is a three-phase transformer with core support, the same effect can be obtained even if the present invention is applied to a single-phase transformer with core support.

As described above, according to the present invention, the iron core is positioned and fixed in the vertical direction by connecting the iron core tightening node to the iron core frame with bolts, and the width direction of the iron core is fixed elastically using Kunjon material. This eliminates the need to tighten and fix the iron core with tightening bolts as in the past, making it possible to securely support the iron core without deteriorating its characteristics. By connecting the core tightening band to the core frame with fixing bolts, it is possible to provide a margin for mutual positioning of adjacent cores, thereby improving the core circular accuracy.

[Brief explanation of drawings]

1 and 2 are front and side views of conventional core support structures, respectively, FIG. 1 is a front view of a transformer body using the core support method according to the present invention, and FIG. 4 is a diagram of FIG. 3. IV of
-IV arrow view. In the figure, 1... roll-wound core, 3a... lug, 4... coil, 11... upper end frame, 12... lower end frame, 14... left end frame, 15...・Right edge frame, 16・
--・Iron core tightening band, 1T --・Screw seat, 18.21・
... Kunjong material, 19... Fixing bolt 20... Connection bolt. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent Shin Kuzuno −

Claims (1)

[Claims] A core frame body is formed by connecting an upper end frame and a lower end frame, each having a box-shaped cross section, with their concave sides facing each other by left and right end frames. Parts of the upper and lower parts of the core are fitted, and fixing bolts are screwed into the core tightening band from the upper and lower end frames to fix the core vertically, and cushioning material is applied to the core to make it elastic. An iron core supporting method characterized by fixing the iron core in the width direction.