Transformer Bushing Sheath Adapting to Angled Conductors
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Solution Overview
Problem
Existing rod assemblies for electrical transformers lack flexible protection for the outer ends of low-voltage rods, which are not adaptable to various types of rod guides, posing a challenge in meeting new standards for protection and efficiency.
Innovation Solution
A rod assembly with a protective sheath around the outer end of the rod, featuring passage holes that can adjust to pass conductors in both longitudinal and angled directions, utilizing a flexible material like rubber for the bellows and incorporating a fixing mechanism that maintains insulation effectiveness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rigid protective sheath is used around the rod outer end, then protection is provided, but adaptability to different rod orientations and conductor directions is reduced
Solution Approach 1:
The protective sheath is made of flexible material (rubber or similar elastomer) that can bend and deform to accommodate different rod orientations and conductor directions while still providing protection. The sheath includes an annular bellows portion that can expand and contract radially to adapt to various installation configurations.
Solution Approach 2:
The protective sheath transitions from a static rigid structure to a dynamic flexible structure that can change its shape and orientation. The bellows design allows the sheath to dynamically adjust its configuration during installation to match different rod angles and conductor routing requirements.
2Adaptability or versatility
If the protective sheath is made flexible to accommodate different orientations, then adaptability is improved, but maintaining effective insulation length becomes more difficult
Solution Approach 1:
The protective sheath is divided into distinct functional segments: a rigid insulating portion that maintains the effective insulation length, and a flexible bellows portion that provides adaptability. This segmentation allows each part to fulfill its specific function without compromising the other.
Solution Approach 2:
Different portions of the protective sheath have different properties: the main body maintains rigid insulating characteristics to preserve effective insulation length, while the bellows portion is made flexible to provide adaptability. This local differentiation of properties resolves the contradiction between rigidity and flexibility.
3Manufacturing precision
If a fixed configuration protective sheath is used, then manufacturing precision is maintained, but versatility for different conductor directions is reduced
Solution Approach 1:
The protective sheath incorporates dynamic flexibility through the bellows design, allowing it to adapt to different conductor directions and rod orientations while maintaining the rigid insulating portion for precise insulation length control.
Solution Approach 2:
The protective sheath is designed to perform multiple functions: providing protection, maintaining effective insulation length, and adapting to various rod orientations and conductor directions. The combination of rigid and flexible portions enables this multi-functionality.
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 flexible protective sheath allows for adaptable protection of the rod assembly, ensuring efficient electrical connectivity while maintaining the effective insulation length and accommodating different rod orientations, thus meeting new standards for protection and versatility.
Implementation Method 1
the bellows is made of natural or synthetic rubber
Data Source
Figure 1
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Figure 3
AI summary
The assembly (1) has a sheath (6) provided in two configurations in which clearance holes (60) respectively pass electrical conductors from a rod (2) along a longitudinal direction and another direction, where the latter direction is inclined with respect to the longitudinal direction. The sheath has a fixation plate (66) threaded on an external end (14) of the rod, and longitudinally arranged towards an end of a wall beyond an electrical isolating device (4). A support clamp (68) clamps the sheath between the plate and the clamp. The sheath has a boot made of synthetic or natural rubber.