Medium-Voltage Switching Pole With Threaded Drive for Flexible Layout
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing medium voltage circuit breakers face challenges in connecting multiple switching poles due to the complexity of using levers or shafts for translational movement, limiting flexibility in pole arrangement and robustness.
Innovation Solution
A medium voltage circuit breaker switching pole design featuring a fixed and movable contact with a threaded drive element, allowing rotational movement to directly transition between open and closed configurations, enabling flexible arrangement and robust operation of multiple poles driven by a common motor.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If levers or shafts are used to connect multiple switching poles, then the poles can be mechanically connected to one drive, but the arrangement of poles is limited to one line and the structure becomes complex
Solution Approach 1:
The patent replaces the traditional lever and shaft mechanical transmission system with a threaded drive element that converts rotational movement directly to translational movement of the movable contact. This substitution eliminates the need for complex intermediate mechanical components and enables more flexible pole arrangements while maintaining mechanical connection to a common drive.
Solution Approach 2:
The invention changes the movement conversion mechanism from angular/rotational transmission through levers and shafts to a threaded screw mechanism that directly converts rotation to linear translation. This parameter change in the movement conversion approach simplifies the mechanical structure and increases arrangement flexibility.
2Reliability
If levers or shafts are used for translational movement, then switching poles can be connected, but robustness is reduced due to difficulty in connecting multiple poles
Solution Approach 1:
The threaded drive element provides a more robust connection mechanism compared to levers and shafts. The threaded engagement creates a rigid, reliable connection between the drive and the movable contact, improving the overall robustness of the switching pole while simplifying the connection of multiple poles to a common drive.
3Productivity
If rotational movement is converted to linear movement through levers or shafts, then the motor can drive the switching pole, but the switching mechanism becomes complex and less efficient
Solution Approach 1:
The patent replaces the inefficient lever and shaft-based movement conversion with a direct threaded drive mechanism. This substitution creates a more efficient transmission path from the motor's rotational output to the linear movement of the movable contact, reducing mechanical losses and improving switching operation efficiency.
Solution Approach 2:
The invention extracts and eliminates the intermediate lever and shaft components from the movement conversion system, retaining only the essential threaded drive element. This extraction simplifies the mechanism and improves efficiency by removing unnecessary mechanical intermediaries that cause energy losses.
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 design simplifies the switching mechanism, enhances robustness, and allows for flexible arrangement of multiple poles, achieving efficient and precise translational movement with minimal mechanical parts, while reducing the complexity of linear movement conversion.
Implementation Method 1
Rotation of the threaded drive element about its centre axis in a first direction is configured to transition the switching pole from the open configuration to the closed configuration
Implementation Method 2
an end of the threaded drive element distil to the movable contact comprises a ball bearing configured to rotate in a ball bearing socket
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention relates to a medium voltage circuit breaker switching pole (10) comprising: a fixed contact (1) of a vacuum interrupter; a movable contact (2) of the vacuum interrupter; and a threaded drive element (5). The movable contact is configured to move along a longitudinal axis of the vacuum interrupter. A centre axis of the threaded drive element is parallel to the longitudinal axis of the vacuum interrupter. When in an open configuration the fixed contact and movable contact are separated from one another. When in a closed configuration the fixed contact and movable contact are in contact with one another. Rotation of the threaded drive element about its centre axis in a first direction is configured to transition the switching pole from the open configuration to the closed configuration. Rotation of the threaded drive element about its centre axis in a second direction counter to the first direction is configured to transition the switching pole from the closed configuration to the open configuration.