JPH0650970Y2 - Oil-feeding static induction - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field to which the Invention belongs] The present invention relates to an improved structure of an oil-feeding static induction device including a magnetic shielding device and an oil guiding device.

[Prior art and its problems]

FIG. 3 and FIG. 4 are structural views of a conventional oil-feeding static induction electric device such as a transformer, FIG. 3 is a longitudinal sectional view, and FIG. 4 is a part of a plan view. A stationary induction machine body 34, which is composed of an iron core 31, a winding 32 wound around the iron core, and a lower frame 33 that supports the winding, is housed in a tank 36 filled with a cooling oil 35. The winding 32 is placed between the lower frame 33 and the winding 32, and is placed on an oil guide device 37 that partitions the inside of the tank 36 into upper and lower parts and extends almost to the inner surface of the tank 36. Oil guide device 37
Cooling oil 35 sent by a pump (not shown) into the tank 36 below the tank 36 cools the winding 32 and the iron core 31 through a through hole provided in the oil guiding device 37 and exits from the upper part of the tank 36. It is cooled by a cooler (not shown) and returns to the lower part of the tank for circulation.

On the inner surface of the tank 36, leakage magnetic flux from windings and lead wires penetrates into the tank 36 and causes an eddy current to increase stray loss, and sometimes to prevent local heating. 38 are arranged on the entire surface or a part of the tank 36 with a predetermined gap 39 in the circumferential direction of the tank 36. The magnetic shielding device 38 is made of a non-magnetic material such as copper or aluminum or a magnetic material formed by laminating silicon steel plates, and a tank 36 around the outer circumference of the oil guiding device 37 is attached by a mounting member (not shown) in the gap 39. It is attached to a flat plate-like mounting plate 40 provided along the oil guide device 37 on the inner surface of the.

A pressing piece 41 made of a flexible material such as a rubber plate or a press board plate is provided at the tip of the oil guide device 37, and the magnetic shielding device is provided.
The cooling oil 35 closely fed to the inner surface of the tank 38 and the inner surface of the tank 36 is designed to cool the electric appliance body 34 without escaping from the gap between the oil guiding device 37 and the magnetic shielding device 38 and the tank 36. There is.

However, the conventional structure has a drawback that the cooling oil 35 sent to the lower part of the tank 36 leaks upward from the gap 39 between the magnetic shielding devices 38 and a considerable amount of cooling oil does not serve for cooling. It was

[Purpose of device]

Another object of the present invention is to provide an oil-feeding static induction machine having a high cooling efficiency by providing a spacing piece for preventing oil leakage from between magnetic shield devices, in addition to the above-mentioned conventional drawbacks.

[Key points of device]

According to the structure of the present invention, the above-mentioned object has a U-shaped opening for closing the gap in the gap between the magnetic shielding devices located on the outer periphery of the oil guide device. A spacing piece is attached to and supported by. With this configuration, the space between the magnetic shield device 38 and the tank 36 is closed by the flat mounting plate 40 that supports the magnetic shield device 38, and the magnetic shield device 38
Since the oil guide device 37 closes the gap between the coil and the winding, and the gap between the magnetic shield devices 38 is closed by the spacing piece, the cooling oil 35 sent to the lower portion of the tank 36 does not leak and the electric appliance main body does not leak. It enters into 34 and is efficiently used for cooling.

[Embodiment of the Invention] FIG. 1 and FIG. 2 are views of an embodiment of the present invention, in which the same reference numerals indicate the same or the same functions as those described above, and FIG. Is a part of the plan view. 3 and 4, the gap 39 in the circumferential direction of the tank 36 between the magnetic shielding devices 38 has a U-shaped opening which is supported by the mounting plate 40 in the oil guide device 37. It is occluded by the piece 1.

The main body 34 of the static induction device and a plurality of strip-shaped magnetic shielding devices 38 which house the main body and which are housed in the main body, are provided in the circumferential direction of the inner surface.
A tank 36 arranged with an opening 39, an oil guide device 37 that divides the inside of the tank 36 into upper and lower parts and guides the cooling oil 35 fed below the tank 36 into the main body 34, and the tank 36 of the oil guide device 37 part. Magnetic shield device 38 provided along the oil guide device 37 on the inner surface
And a mounting plate 40 for supporting the. And oil guide device
A U-shaped opening is formed in a gap 39 between the magnetic shielding devices 38 of 37 so as to close the gap.
A U-shaped spacing piece 1 that is attached to and supported by is provided. With this structure, the inner surface of the tank 36 of the oil guide device 37 and the magnetic shield device 38 are attached by the mounting plate 40, the space between the magnetic shield device 38 and the electric appliance main body 34 is formed by the oil guide device 37, and the magnetic shield device 38 is further arranged. Since the gap 39 is closed by the spacing piece 1, the cooling oil 35 sent without any oil leakage from the inner peripheral portion of the tank 36 is effectively used for cooling the main body 34.

[Effect of device]

As is apparent from the above description, according to the present invention, the gap 39 between the magnetic shielding devices 38 is closed by the gap piece 1 supported by the mounting plate 40, so that the cooling water fed to the lower portion of the tank 36 is cooled. The oil is effectively used for cooling the main body 34 without leaking, and it is possible to obtain an oil-feeding static induction machine with high cooling efficiency.

[Brief description of drawings]

1 and 2 are longitudinal sectional views of a part of the embodiment of the present invention,
2 is a cross-sectional plan view of the AA portion of FIG. 1, FIG. 3 is a vertical cross-sectional view of a conventional oil-feeding static induction electric generator, and FIG. 4 is a cross-sectional plan view of the BB portion of FIG. 1: Spacing piece, 34: Electric body, 35: Cooling oil, 36: Tank, 37: Oil guide device, 38: Magnetic shielding device, 39: Gap, 40: Mounting plate.

Claims (1)

[Scope of utility model registration request] 1. A plurality of strips supported by a stationary induction body, a tank for accommodating the body, and a mounting plate provided on the inner surface of the tank with a gap in the circumferential direction of the inner surface of the tank. A cooling oil, which has a magnetic shielding device, is arranged between the winding of the main body and a lower frame supporting the winding, partitions the inside of the tank into upper and lower parts, and is fed below the cooling oil. An oil guiding device for guiding, and a pressing piece arranged so as to be in intimate contact with the inner surface of the magnetic shielding device or the inner surface of the tank at the tip of the oil guiding device, wherein a gap portion between the magnetic shielding devices is provided. The oil-feeding static induction machine according to claim 1, further comprising a U-shaped opening so as to close the gap, and a spacing piece mounted on the mounting plate and supported by the opening.