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Sealing edge cross-sectional profiles to allow brazing of metal parts directly to a metallized ceramic for vacuum interrupter envelope construction

A technology of metal components and cross-sections, applied in high-voltage air circuit breakers, electrical components, high-voltage/high-current switches, etc., can solve problems such as thickness reduction, lack of strength, and reduced mechanical strength

Inactive Publication Date: 2007-01-17
EATON CORP
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  • Summary
  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

The disadvantage of this solution is that the single-step thickness reduction significantly reduces the mechanical strength of the sealing cup, especially under compressive loads
These outer center shields are either expensive or lack the necessary strength

Method used

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  • Sealing edge cross-sectional profiles to allow brazing of metal parts directly to a metallized ceramic for vacuum interrupter envelope construction
  • Sealing edge cross-sectional profiles to allow brazing of metal parts directly to a metallized ceramic for vacuum interrupter envelope construction
  • Sealing edge cross-sectional profiles to allow brazing of metal parts directly to a metallized ceramic for vacuum interrupter envelope construction

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Embodiment Construction

[0025] As used herein, words and phrases such as, but not limited to, "equilateral trapezoid" describing the shape or profile of the sealing edge refer to the shape or profile when viewed in cross-section as shown. It will be appreciated that in the preferred embodiment the sealing edge is actually a circular ring or other closed peripheral shape.

[0026] As used herein, the phrase "sealing edge" refers to the edge of the metal end cap or outer center shield attached to the ceramic portion of the vacuum interrupter chamber body. While certain shapes and contours of the sealing edge are shown in the figures only in association with the end cap or outer center shroud, it will be appreciated that the end cap or outer center shroud may use any particular shape or contour of the sealing edge .

[0027] As used herein, the phrase "... a gradual decrease in thickness" refers to a change in thickness over a length that occurs linearly in two or more steps and / or on a curve.

[0028...

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Abstract

The present invention relates sealing edge cross-sectional profiles to allow brazing of metal parts directly to a metallized ceramic for vacuum interrupter envelope construction. A metal component (31) for a vacuum chamber (30), such as an end cap (34,36) or external center shield (35), having a sealing edge (54) portion with a cross-sectional wall thickness that is gradually reduced from the thickness of the metal component body (50) to a more narrow sealing surface (80) where the metal component (31) is structured to be joined with a ceramic component.

Description

technical field [0001] The present invention relates to vacuum interrupters, and more particularly to a method of connecting a metal end cap and an outer center shield of a vacuum chamber to a ceramic chamber body of a vacuum interrupter. Background technique [0002] Circuit breakers protect electrical systems from electrical faults such as current overloads, short circuits, and low-level voltage conditions. Typically, circuit breakers include a spring-driven operating mechanism that, in response to abnormal conditions, opens electrical contacts within the vacuum interrupter to interrupt current flow through conductors in the electrical system. The vacuum interrupter includes a separable main contact disposed within an insulated and sealed vacuum chamber. The vacuum chamber typically includes one or more ceramic parts for electrical insulation and one or more metal members to form an enclosure in which a vacuum can be drawn. The metal members are easy to form and provide ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H33/66H01H33/662
CPCH01H33/66207H01H2033/66223H01H33/66H01H33/662
Inventor W·李
Owner EATON CORP
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