Tap Changer Gearbox Synchronization via Geneva Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tap changer systems require complex and circumstantial driving and transmission devices for precise and timed operations, making them cumbersome and prone to errors during voltage adjustments.
Innovation Solution
A multifunctional gearbox that uses a single driving source to convert movements for actuating switches and selector arms with precise timing, incorporating reduction gear means and a Geneva wheel mechanism for synchronized and intermittent drive outputs, ensuring reliable and secure operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple separate driving devices are used for actuating switches and selector arms, then each component can be independently controlled, but the overall device complexity increases and reliability decreases
Solution Approach 1:
The patent combines multiple driving functions (switch actuation and selector arm movement) into a single integrated gearbox. The gearbox receives one input drive shaft and internally distributes it to multiple outputs through reduction gear means and timing connection means, eliminating the need for multiple independent driving devices and reducing overall system complexity while improving reliability through coordinated operation.
Solution Approach 2:
The gearbox serves multiple functions simultaneously: it acts as a power distribution unit, a timing synchronization unit, and a speed reduction unit. By making the gearbox multifunctional, the patent eliminates the need for separate devices for each function, thereby reducing device complexity while maintaining reliable operation of all components.
2Manufacturing precision
If precise timing coordination between selector arms and diverter switch is required, then operation accuracy improves, but device complexity increases
Solution Approach 1:
The timing connection means within the gearbox pre-establishes the correct timing relationships between different outputs during the design phase. The reduction gear means and timing connection means are configured to automatically coordinate the movement of selector arms and diverter switch actuation in the correct sequence, eliminating the need for complex real-time control mechanisms and achieving precise timing through preliminary mechanical arrangement.
3Device complexity
If a single driving source is used for all outputs, then device complexity reduces and compactness improves, but achieving precise and varied movement patterns becomes difficult
Solution Approach 1:
The gearbox segments the single input drive into multiple independent output paths, each with its own reduction gear means and timing connection means. This segmentation allows each output to have different movement characteristics (rotating, stationary, intermittent motion) while still being driven by a single source, thereby maintaining adaptability and versatility in movement patterns without increasing overall device complexity.
Data Source
AI summary
The invention relates to a gearbox for a tap changer. The gearbox has an input drive shaft (1) arranged to be connected to a motor. The gearbox also has a diverter switch drive output (3) with a diverter shaft (31). The diverter switch drive output (3) is arranged to be connected for actuation of breakers in a diverter switch of the tap changer. According to the invention the gearbox further has first (4) and second (5) selector arm drive outputs arranged for actuation of a tap selector of the tap changer. It also has reduction gear means (71) connecting the input drive shaft (1) to the diverter switch drive output (3) and to each of the selector arm drive outputs (4, 5). Further the gearbox has timing connection means arranged to connect the reduction gear means (11, 71) to each of the selector arm drive outputs (4, 5). The invention also relates to a tap changer having such a gearbox and to a transformer provided with such a tap changer.