Adjustable Retaining Member for Transformer Winding Stability
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Solution Overview
Problem
Cast-resin dry-type electric transformers face instability issues during transportation and installation, particularly due to impacts and vibrations such as those caused by earthquakes, which can lead to misalignment and instability of windings.
Innovation Solution
A retaining member is introduced for the pressing device, featuring adjustable legs and notched walls that adapt to the winding thickness, providing additional stability by forming a support base and coupling with the pressing device to secure the winding to the yoke clamp.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional pressing device with screw and nuts is used to block the winding to the yoke clamp, then the device can be assembled and disassembled easily, but the stability and alignment of the winding is insufficient under impacts and vibrations
Solution Approach 1:
The retaining member is divided into two separate bodies (first body and second body) that can be assembled together. Each body has legs that can be independently positioned, allowing the structure to be segmented for easier assembly while providing stable support when combined. The segmentation allows the pressing device to be blocked to the yoke clamp in a step-by-step manner, improving reliability without requiring a monolithic complex structure.
Solution Approach 2:
The distance between the legs of the retaining member is adjustable, allowing the structure to adapt dynamically to different winding thicknesses. This dynamic adjustment capability enables the retaining member to maintain optimal contact and stability under various conditions, including impacts and vibrations, while keeping the device design flexible and not overly complex.
2Adaptability or versatility
If the distance between legs is fixed, then the manufacturing precision is easier to control, but the adaptability to different winding thicknesses is reduced
Solution Approach 1:
The retaining member incorporates adjustable legs that can change the distance between them to adapt to different winding thicknesses. This dynamic adjustability is achieved through a mechanism allowing relative movement between the first and second bodies, enabling the structure to accommodate various winding dimensions while maintaining manufacturing precision through controlled adjustment mechanisms.
Solution Approach 2:
The distance between the legs of the retaining member can be changed as a variable parameter to match different winding thicknesses. This parameter change capability allows the same retaining member design to be used across multiple applications with different winding dimensions, improving adaptability while the adjustment mechanism maintains sufficient manufacturing precision for each specific configuration.
3Reliability
If greater stability is provided by coupling a retaining member with adjustable legs, then the alignment and stability under impacts is improved, but the ease of operation is reduced
Solution Approach 1:
The retaining member is segmented into two bodies that can be assembled together in a straightforward sequence. The first body with its legs can be positioned independently, and then the second body is coupled to complete the structure. This segmentation simplifies the assembly process by breaking it into manageable steps, maintaining ease of operation while achieving the alignment and stability required for reliable winding support under impacts and vibrations.
Data Source
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AI summary
It is described a retaining member (10) for a pressing device (1) for a cast-resin dry-type electric transformer, comprising a disk (30, 31, 34, 35) configured to form a support base for the pressing device on a winding (8) of the cast-resin dry-type electric transformer and legs (22, 42) for mounting astride the winding, wherein the distance between said legs is adjustable to adapt to the winding section.