Tap Changer Oil Expansion Vessel Integration
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Solution Overview
Problem
Existing tap changer designs require separate oil conservators and complex pipe connections for oil expansion, leading to increased space requirements, additional installation work, and laborious maintenance processes due to the need for separate assembly and disassembly of components.
Innovation Solution
An oil conservator is integrated between the insulating cylinder and the tap changer head, open at both top and bottom, eliminating the need for external connections and allowing the tap changer to be pre-assembled with the conservator as an integral part, thus simplifying maintenance and reducing space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate oil conservator is provided for the tap changer, then oil expansion can be accommodated, but additional space requirements and installation complexity increase
Solution Approach 1:
The patent merges the oil conservator function with the transformer tank by creating a common oil volume that serves both the transformer and the on-load tap changer. This eliminates the need for a separate, independent oil conservator for the tap changer, thereby reducing installation complexity while still accommodating oil expansion through the shared conservator space.
2Reliability
If separate oil conservators are used for tap changer and transformer, then oil expansion is managed, but additional pipe connections and flanges are required
Solution Approach 1:
The patent combines the oil volumes of the transformer and tap changer into a single common oil volume within the transformer tank. This merging eliminates the need for separate pipe connections, flanges, and conservators, significantly reducing connection complexity while maintaining proper oil expansion management through the shared volume.
3Reliability
If an independent oil conservator is mounted on the tap changer head, then oil expansion is accommodated, but maintenance accessibility is reduced
Solution Approach 1:
By integrating the oil conservator function into the transformer tank structure and creating a common oil volume, the patent eliminates the need for a separate conservator mounted on the tap changer head. This allows maintenance personnel to access the tap changer head directly without first disassembling a separate conservator assembly, thereby improving maintenance accessibility.
4Reliability
If a separate oil conservator is provided, then oil volume fluctuations are compensated, but the overall device size increases
Solution Approach 1:
The patent merges the oil conservator function with the existing transformer tank volume, creating a common oil volume that serves dual purposes. This eliminates the need for an additional separate conservator vessel, thereby maintaining oil volume fluctuation compensation capability while avoiding an increase in the overall device size.
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
This solution enables a compact, cost-effective design that simplifies installation, maintenance, and operation by eliminating the need for external connections and allowing direct access to the tap changer head without disassembling the oil conservator, enhancing maintenance accessibility and reducing assembly complexity.
Implementation Method 1
there is a need to provide a special volume for the oil expansion that occurs as a result of temperature fluctuations
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a tap changer (1) for the uninterrupted switching between winding taps of a tap transformer. Said tap changer comprises an oil vessel (2) which accommodates the components of the tap changer (1) and which comprises an upper oil vessel flange (3), and a tap changer head (4) with a head flange (5). An oil expansion vessel (6) having an upper flange (7) and a lower flange (8) is arranged between the oil vessel (2) and tap changer head (4). Said upper flange (7) of the oil expansion vessel (6) is connected mechanically and in an oil tight manner to the head flange (5), and the lower flange (8) of the oil expansion vessel (6) is connected mechanically and in an oil tight manner to the upper oil tank flange (3).