JPH0645155A - Core vibration-preventing structure for indution machine - Google Patents

Abstract

PURPOSE:To enable an operation of inserting a core vibration preventing structure to be easily carried out by a method wherein the vibration preventing structure is composed of two spacing pieces which serve to prevent vibrations, where one of the spacing pieces is formed into a wedge whose upper part is thick and lower part is thin, the other spacing piece is also formed into a wedge whose upper part is thin and lower part is thick, either of them is mounted movable in a vertical direction, and the other is mounted as fixed. CONSTITUTION:A spacing piece inserted between a frame 422 of a lower frame and an anti-vibration table 6 to fix them together is composed of wedge-shaped spacing pieces 111 and 112. The spacing piece 111 is fixed to the anti-vibration table 6, and the spacing piece 112 is fixed with a bolt 113 which penetrates an ellipse 114 provided to the frame 422. By this setup, the thin parts of the spacing pieces 111 and 112 are made to approach each other first when a core is made to descend into a tank 1, and then the contact slopes of the spacing pieces 11 and 112 are brought into contact with each other and relatively fixed in position as the core descends more. Therefore, a dimensional error generated between a lower frame and an anti-vibration table can be absorbed, and an insertion operation can be easily carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a machine for protecting the contents of a large-capacity induction electric generator such as a transformer and a shunt reactor, which is composed of an iron core and windings, and a tank storing the same, against vibration and acceleration during transportation. The present invention relates to a steady rest structure for mechanical integration.

[0002]

2. Description of the Related Art A large-capacity induction generator is transported to a substation or a power plant where it is installed by land transportation such as a trailer or railroad, or by ship transportation. At this time, in the case of land transportation, a predetermined acceleration is preliminarily set so that the contents will not move and be damaged due to the acceleration caused by the unevenness of the road surface or the railroad tracks and the acceleration caused by the shaking due to the waves in the ship transportation. Manufactured in a structure that can withstand. Since the tank is fixed from the outside during transportation, a device for fixing the contents to the tank is important after all, and such a structure is called a steady rest. As an acceleration that must be endured during transportation, a gravitational acceleration of 1 G may be set to a considerably large value such as 3 G for trailer transportation, 3 G for ship transportation, and 6 G for rail transportation.

FIG. 2 is a side view of a large-capacity transformer. The tank 1 is shown by a single line only for the periphery and the side wall in front is omitted so that the contents are shown. In this figure, the contents 2 of a transformer consisting of an iron core 21 and windings 22 are housed in a tank 1. There are various transportation methods for large-capacity transformers, and there is also a method called disassembly transportation in which the iron core and windings are transported separately.
Most of them are tanks 1 that double as contents and also serve as shipping containers.
It is general that nitrogen gas, which is an inert gas, is enclosed and transported instead of the insulating oil that is stored in and enclosed during operation, and such a transportation method is called assembling transportation.

In the case of assembling transportation, it is necessary to fix the contents 2 to the tank 1 so as to sufficiently withstand the acceleration during transportation as described above, and for that reason, the upper portion is the upper steady rest 5
In the lower part, the lower steady rest 6 and the spacing piece hidden in the lower frame 42 are inserted to form a steady rest structure. An upper frame 41 is provided above the iron core 21, and a lower frame 42 is provided below the iron core 21.
And upper and lower frames 41, 4 not shown
A structure is adopted in which a tensile force is applied to the connecting plate connecting the two and a compressive force is applied to the winding wire 22 as a reaction thereof to withstand a strong electromagnetic force generated by a short-circuit current flowing through the winding wire 22 when an external circuit is short-circuited. .

FIG. 3 is a front sectional view showing a detailed structure of the lower steady rest structure, FIG. 4 is a horizontal sectional view which is also a sectional view taken along line AA of FIG. 3, and FIG. 3 is also a sectional view taken along line BB of FIG. is there. In these drawings, the lower frame 42 is composed of two frames 42 horizontally arranged so as to be sandwiched from both sides of the lower part of the iron core 21.
1, 423 and a frame frame 42 that connects these at their ends
It consists of 2. The spacing piece 10 is inserted between the frame 422 and the iron core 21 to fix the iron core 21 so as to suppress the movement of the iron core 21 with respect to the frame 42 and the frame 422 in the left-right direction in the drawing. Frame 42 (not shown)
The structure for fixing between 1,423 and the iron core 21 is also adopted. On the other hand, the steady rest 6 is provided so as to project from the tank 1, and the spacing piece 11 is provided in the gap between the steady rest 6 and the frame 422 between the steady rest 6 and the end of the frame 421. Is a spacing piece 13,
The spacing pieces 14 are inserted between the steady rest 6 and the end of the frame 423. Such a structure is the same at the right end, and the left and right sides of the lower frame shown in FIG. The movement in the vertical and vertical directions is suppressed and fixed.

Since the spacing piece 10 is a part of the contents 2, before the contents 2 are stored in the tank 1, it is possible to determine the thickness of the space 2 according to the actual size of this part and insert it. On the other hand, the space pieces 11 and 13 are determined in actual size only when the content 2 is stored in the tank 1. Therefore, the spacing pieces 11, 13 and 14 are inserted by inserting the contents 2 into the tank 1 and then inserting the hand into the hand hole 7 of FIG. This handhole 7 is provided for inserting such spacing pieces 11, 13, 14.

The oil guide 8 shown in FIG. 2 and FIG.
The oil guide 8 is shown by a single line in FIG. 2 to divide the space into upper and lower parts with the lower end of 2 as a boundary. The left end of the oil guide 8 is in contact with the left tank 1 and the right end is in contact with the right tank 1. In addition to being connected up to the part, it reaches the side wall of the tank 1 which is not shown in this figure. The insulating oil cooled by the cooler is introduced into the lower space partitioned by the oil guide 8, passes through the cooling duct in the winding wire 22 and the iron core 21, reaches the upper portion, and is led to the cooler again. In this way, the oil guide 8 suppresses the insulating oil cooled by the cooler from escaping into the space between the winding 2 and the tank 1 and not contributing to the cooling effect, thereby effectively cooling the content 2. It is a thing. The oil guide 8 extends straight from the lower end surface of the winding wire 22 to the left and right in FIG.
In the drawing, a structure in which the hand bump 7 is hit is shown, and the hand hole 7 is provided below the hit position, but in some cases, the oil guide 8 hits the tank 1 in order to secure a size for providing the hand hole 7. In some cases, it may be necessary to form the oil guide 8 in a bent shape in order to move it to a higher position.

[0008]

As described above, the spacing pieces 11, 13, between the steady rest 6 and the lower frame 42,
There is a problem that the hand hole 7 is required for inserting the hand hole 14, and the complicated shape in which the eig guide 8 is bent must be adopted in order to secure the dimension necessary for providing the hand hole 7. The handhole 7 restricts a strong arrangement for ensuring the mechanical strength of the tank 1 which does not occur.

An object of the present invention is to solve such a problem, and to insert a spacing piece for steadying between the steadying stand 6 and the lower frame 42 without the handhole 7 into a steadying structure. To provide.

[0010]

In order to solve the above-mentioned problems, according to the present invention, the contents and tank of an induction machine in which the contents consisting of a winding wire and an iron core are housed in a tank are mechanically connected. An integrated steady rest structure, which is inserted between a lower frame fixedly arranged so as to surround the lower part of the iron core and a steady rest provided so as to project from the tank to fill the gap. At least one spacing piece for fixing the contents to the tank is composed of first and second wedge-shaped spacing pieces whose contact surfaces are oblique to each other.
The first spacing piece is attached to the steady rest and has a shape having a thick top and a thin bottom, and the second spacing piece is attached to the frame and has a shape having a thick bottom and a thin top. It is assumed that one of the spacing pieces is movably mounted in the vertical direction and the other spacing piece is fixedly mounted, and the first or second spacing piece movably mounted in the vertical direction is mounted. It shall be mounted with bolts that penetrate through vertically long slots provided in the steady rest or frame.

[0011]

In the structure of the present invention, the spacing piece as the steady rest between the lower frame and the steady rest is the first spacing piece attached to the steady rest and the second spacing piece attached to the lower frame.
The first spacing piece has a wedge shape with a thin upper portion and a thick lower portion, and the second spacing piece has a wedge shape with a thick upper portion and a thin lower portion. One of the second spacing pieces is movably mounted in the vertical direction, and the other spacing piece is fixedly mounted so that when the contents are inserted into the tank, the first spacing piece and the second spacing piece are mutually attached. The relative position of both spacing pieces cannot be changed at the position where the contact surface of the above contacted, and when the content further descends, the relative position to the lower frame or the steady rest that the movable spacing piece is attached moves vertically. By doing so, the relative positions of the spacing pieces are fixed. Since the contact surfaces of the first and second spacing pieces are slanted, the sum of the thicknesses of the two spacing pieces changes depending on the position where the relative position is fixed. It is possible to absorb the dimensional error with the table. In this way, since the aforementioned interval piece is inserted and fixed when inserting the contents into the tank, the operation of inserting the interval piece after inserting the contents becomes unnecessary, and the hand hole provided for this operation is also unnecessary accordingly. become.

Further, by mounting a vertically movable space piece with a bolt penetrating a vertically long slot provided in a lower frame or a steady rest to which the space piece is attached, the space piece is attached through the bolt. It can be moved up and down by the length of the slot.

[0013]

EXAMPLES The present invention will be described below based on examples.
FIG. 1 is a side sectional view showing an embodiment of the present invention, and the same members as those in FIG. 3 are designated by the same reference numerals and detailed description thereof will be omitted. In this figure, the steady rest 6 and the frame 4
The spacing pieces between the first and second spacing pieces 111 mounted on the steady rest 6 and the frame pieces 422 are the spacing pieces between
The first and second spacing pieces 1 are made up of two
Reference numerals 11 and 112 each have a wedge shape, and their contact surfaces are inclined as shown in the drawing. First spacing piece 1
Reference numeral 11 is fixed to the steady rest 6 by bolts (not shown), and as will be described later, downward force when inserting the contents 2 including the iron core 21 and the winding wire 22 not shown in this figure into the tank 1. Stopper 61 to prevent the bolts from directly
Supported by. The second spacing piece is attached by a bolt 113 penetrating an elongated hole 114 provided in the frame 422, and the bolt 113 is loosely attached so as to be freely movable in the elongated hole 114. Therefore, the second spacing piece 112 is also movable in the vertical direction with respect to the frame 422.

These first and second spacing pieces 111, 112
Is attached in advance before the work of inserting the contents 2 into the tank 1. As described above, the bolt 113 has the long hole 114.
Since it is movable in the up and down direction, when only the content 2 is present, the bolt 113 is lowered by the weight of the second spacing piece 112 and the bolt 113 is located at the bottom of the elongated hole 114.

In the process of hoisting the contents 2 with a crane and gradually lowering them from the top of the tank 1 and inserting them into a predetermined position, first, just before the contents 2 reach the bottom of the tank 1, the first spacing piece 111 and The second spacing piece 112 approaches. At this time, since the small thickness portions of the spacing pieces 111, 112 first approach each other, the contact surfaces that are oblique to each other are in a state of separation, and the gap between the contact surfaces gradually decreases as the content 2 further descends. Then, the contact surfaces finally come into contact with each other. After the contact, they are pressed against each other and the thickness is slightly contracted, but the lowering of the second spacing piece 112 is stopped. However, the frame frame 422 integrated with the contents 2 further descends to reach the bottom and settles at that position. During this time, the spacing piece 112 moves upward relative to the frame 422, but this movement is possible by moving the bolt 113 upward in the elongated hole 114 as described above. Become. In a state where the contents 2 are accommodated in the tank 1, the first and second spacing pieces are sandwiched between the frame frame 422 and the steady rest 6 and the left and right directions of the contents 2 through the frame frames 422 of the two. Restrain the movement of.

Such two wedge-shaped spacing pieces 11
The steady rest by 1,112 is also applied to the positions corresponding to the spacing pieces 13, 14 in FIG. 4, and the same is true for the right end in FIG.
Therefore, when the contents 2 are set in a predetermined position in the tank 1, the lower portion of the contents 2 is fixed not only in the left-right direction of FIG. Is fixed to the tank 1 and stable transportation is possible.

Thus, the steady rest 6 and the frame 42
Since the insertion of the spacing piece as a steady rest between and is completed at the same time as the insertion work of the contents 2, the installation of the handhole 7 which is conventionally required becomes unnecessary, and accordingly, the oil guide 8 is bent, There is no problem that the strong arrangement of the tank 1 is restricted. In the above embodiment, the frame frame 4
The second spacing piece 112 attached to the frame 22 is attached to the frame 4
Although it is mounted so as to be movable in the vertical direction with respect to 22, the first spacing piece 111 is mounted so as to be movable with respect to the steady rest 6 without being limited to this. It is also possible to adopt a configuration in which the spacing piece 112 of is fixed. However, the configuration of FIG. 1 is more natural for various reasons. Also, not only transformers, but also large-capacity reactors such as shunt reactors are common to large-capacity transformers in that the contents are composed of an iron core and windings and are stored in a tank. Even if this invention is applied to, the same effect as a transformer can be obtained.

[0018]

As described above, according to the present invention, the spacing piece for filling and fixing the gap between the lower frame and the steady rest is provided.
It is composed of two wedge-shaped spacing pieces, a first spacing piece attached to the steady rest and a second spacing piece attached to the lower frame, and one of the first and second spacing pieces is arranged in the vertical direction. Movably attached to the other space piece, and the other space piece is fixed and attached, so that when the content is inserted into the tank, the relative distance between both the space pieces at the position where the first space piece and the second space piece contact each other. When the position is fixed and the contents further descend, the position relative to the lower frame or the steady rest, to which the movable spacing piece is attached, is moved in the vertical direction. Since the contact surfaces of the first and second spacing pieces are slanted, the sum of the thicknesses of the two spacing pieces changes depending on the position where the relative position is fixed. It is possible to absorb the dimensional error with the table. In this way, since the aforementioned interval piece is inserted and fixed at the same time when the contents are inserted into the tank, the interval piece insertion work after the contents insertion becomes unnecessary, and accordingly, it is provided for this work. The effect that the hand hole becomes unnecessary and the problem that the oil guide is bent to complicate the shape due to the provision of the hand hole and the arrangement of the tank is constrained is eliminated can be obtained. Also, by mounting a vertically movable spacing piece with a bolt that penetrates a vertically elongated long hole provided in the lower frame or steady rest to which it is attached, this spacing piece is attached to the elongated hole through the bolt. It will be possible to move up and down by the length.

[Brief description of drawings]

FIG. 1 is a side sectional view showing an embodiment of the present invention.

[Fig.2] Side view of high-capacity transformer

3 is a front cross-sectional view that is also a cross-sectional view taken along line BB in FIG. 4 showing a part of FIG. 2 in detail.

FIG. 4 is a horizontal sectional view which is also a sectional view taken along line AA of FIG.

[Explanation of symbols]

 1 Tank 2 Contents 21 Iron Core 22 Winding 42 Lower Frame 111 First Spacing Piece 112 Second Spacing Piece 6 Steady Stand 113 Bolt 114 Long Hole

Claims (2)

[Claims] 1. A steady rest structure in which the contents of a winding and an iron core are housed in a tank to mechanically integrate the contents and the tank, and is fixed around the lower part of the iron core. Between at least one spacing piece that fixes the contents to the tank by inserting it between the lower frame that is arranged in a row and the steady rest that is provided so as to project from the tank and fills the gap. It is composed of first and second wedge-shaped spacing pieces whose surfaces are slanted, and the first spacing piece is attached to the steady rest and has a thick top and a thin bottom, and the second spacing piece is It is attached to the frame and has a thick bottom and a thin top. One of the first and second spacing pieces is movably mounted in the vertical direction, and the other spacing piece is fixedly mounted. The steady rest structure of the induction electric device. 2. A first or second spacing piece movably mounted in the vertical direction is mounted by a bolt penetrating a vertically long slot provided in a steady rest or a frame to which the spacing piece is mounted. The steady rest structure of the induction electric device.