Electrical bushing and methods of producing an electrical bushing
AssigneeHitachi Energy Ltd
InventorsSamuel Broderick, Peter Sjoberg, Jan Czyzewski
Life of this patent
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Abstract
An electrical bushing is specified, the bushing including a flange with a lower part and an upper part affixed to one another and further including a core surrounded by the flange, wherein the flange is affixed to the core by a locking compound disposed in a volume of a joint between the flange and the core, and wherein the volume of the joint further includes a compressible material, the compressible material being configured to compress or expand in response to a change in the volume of the joint. Furthermore, a method of producing an electrical bushing is specified.
Claims20
An electrical bushing, comprising:
- a flange comprising a lower part and an upper part affixed to one another,
- a core surrounded by the flange, and
- a volume of a joint between the flange and the core, the volume of the joint delimited by a flange step transition and by a core diameter transition,
- wherein:
- the flange is affixed to the core by a locking compound disposed in the volume of a joint, and
- the volume of the joint further comprises a compressible material, the compressible material being configured to compress or expand in response to a change in the volume of the joint.
A method for producing an electrical bushing, the method comprising:
- providing a core and a flange with a lower part and an upper part;
- arranging the upper part and the lower part of the flange around the core;
- affixing the upper part and the lower part to one another;
- forming a joint delimited by a flange step transition and by a core diameter transition between the flange and the core, comprising the steps of:
- injecting a locking compound filling a second portion of the volume of the joint, wherein a compressible material is provided in a first portion of the volume of the joint, and
- curing the locking compound while it is in contact with the compressible material.
An electrical bushing, comprising:
- a flange comprising a lower part and an upper part affixed to one another, and
- a core surrounded by the flange,
- wherein:
- the flange is affixed to the core by a locking compound disposed in a volume of a joint between the flange and the core, and the volume of the joint further comprises a compressible material, the compressible material being configured to compress or expand in response to a change in the volume of the joint,
- wherein the core has a first section with a diameter that is larger than a diameter of a second section and a diameter of a third section,
- wherein the first section is arranged between the second section and the third section along an axial direction of the bushing, wherein the flange forms a seat for a first transition between the first section and the second section and wherein the volume of the joint is delimited by a second transition between the first section and the third section,
- wherein the seat is located at the lower part of the flange and the joint is located at least in part at the upper part of the flange or vice versa,
- wherein the compressible material comprises at least one of:
- an elastomer, a gel, a compressible filler, expancels, and
- wherein the locking compound is an Epoxy-type resin, an Epoxy-type adhesive, a Silicone-type adhesive or a Polyurethane-type adhesive.
Dependencies are inferred from the claim text.