Single-Piece Aluminum Mounting Member for Isolation Switch Contacts
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Solution Overview
Problem
Existing mounting members for disconnector contacts in medium voltage alternating current distribution cells are fragile due to complex manufacturing processes and high manufacturing tolerances, leading to insufficient service life and increased costs.
Innovation Solution
A mounting member made from a single piece of aluminum casting, integrating a flat base, fixing portion, and side walls, which serves as a mechanical support, heat sink, and anti-corona deflector, simplifying production and assembly while reducing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mounting member is made from multiple components to withstand various stresses, then the functional requirements are met, but the manufacturing complexity and assembly difficulty increase
Solution Approach 1:
The patent combines multiple functional components (mechanical support, anti-corona device, and heat sink) into a single integrated mounting member made from aluminum casting. This merging eliminates the need for separate components while maintaining all required functions, thereby reducing manufacturing complexity and assembly steps while preserving the ability to withstand mechanical, thermal, and electrodynamic stresses.
Solution Approach 2:
The mounting member is designed as a multi-functional component that simultaneously provides mechanical support for the contact, acts as an anti-corona device through its geometric shape, and serves as a heat sink for thermal management. This universal design allows one component to fulfill multiple roles, reducing the overall system complexity while ensuring reliable operation under various stress conditions.
2Reliability
If multiple components are assembled to form the mounting member, then functional requirements are met, but manufacturing tolerances reduce assembly accuracy and strength
Solution Approach 1:
By casting the mounting member as a single integrated piece, the patent eliminates assembly operations between multiple components. This removes the accumulation of manufacturing tolerances that would occur during assembly, ensuring higher dimensional accuracy and stronger structural integrity. The single-piece construction guarantees precise geometric relationships between different functional features without being affected by assembly variations.
3Reliability
If multiple components are used in the mounting member, then stress resistance is achieved, but the assembly becomes fragile and service life is reduced
Solution Approach 1:
The single-piece aluminum casting construction eliminates weak points and potential failure zones that would exist at the interfaces between multiple assembled components. The continuous material structure provides uniform stress distribution throughout the mounting member, enhancing its durability and resistance to fatigue from repeated mechanical, thermal, and electrodynamic stresses, thereby extending service life.
Solution Approach 2:
The patent utilizes aluminum casting material which combines favorable mechanical properties (strength, ductility) with excellent thermal conductivity. This material selection provides inherent resistance to various stresses while maintaining structural integrity over time, contributing to the extended service life of the mounting member.
4Reliability
If multiple components are manufactured separately, then specific functions can be optimized, but manufacturing costs and production time increase
Solution Approach 1:
The integrated aluminum casting design allows all functional features (support structure, anti-corona geometry, heat dissipation pathways) to be created in a single manufacturing operation. This eliminates multiple manufacturing steps, reduces production time, and lowers costs associated with assembling multiple components, while still achieving the required functional performance through careful design of the casting geometry.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The aluminum casting mounting member enhances durability and thermal conductivity, improving resistance to mechanical, thermal, and electrodynamic stresses, while reducing manufacturing complexities and costs, thus extending the service life and improving the assembly's accuracy.
Implementation Method 1
aluminum is a material particularly suitable for the molding process and is a good thermal conductor
Data Source
Figure 1~2
Figure 3A~3B
AI summary
The member (34) has a base (36) extending in a transverse vertical plane and including a fixing unit for fixing the mounting member on an insulating support of an isolation switch. A cross-piece (40) for fixing a contact on the mounting member extends transversely, where the cross-piece is located vertically spaced from the base. The base and the cross-piece are formed integrally by aluminum molding. An anti-deflector includes a ring that is formed integrally with the base and the cross-piece. An independent claim is also included for an arrangement for fixing a contact of an isolation switch in a medium-voltage current distribution cell.