Slidable Current Collector With Fluid Suspension for Stable Rail Contact
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Solution Overview
Problem
Freely steerable heavy work machines face challenges in maintaining a stable electrical connection with power rails due to uneven terrain, leading to disconnections and arcing, which existing systems fail to address effectively.
Innovation Solution
A slidable current collector with a fluid suspension system, featuring carbon brushes, conductive fluids, and insulative bladders, that allows for multiple degrees of freedom and stable contact with power rails, using magnetic attraction and fluid pressure to manage contact and prevent arcing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If adhesion between the current collector and the rail is increased to decrease disconnections, then connection reliability is improved, but drag on the arm increases and wear on the current collector accelerates
Solution Approach 1:
The current collector transitions from a static contact system to a dynamic one where individual contact elements can independently adjust their position and contact pressure. The flexible support structure allows the collector to adapt its configuration in real-time, optimizing the balance between adhesion and drag based on operational conditions
Solution Approach 2:
The current collector is divided into multiple discrete contact elements (such as carbon brushes or conductive components) that can independently interact with the rail. This segmentation allows selective engagement and disengagement of contact points, reducing overall drag while maintaining reliable electrical connection through distributed contact
2Adaptability or versatility
If the current collector is made freely steerable to navigate uneven terrain, then adaptability to terrain variations is improved, but maintaining stable electrical connection becomes more difficult
Solution Approach 1:
The current collector incorporates dynamic adjustment mechanisms that allow it to adapt its position and orientation in response to terrain variations. The flexible support structure enables real-time reconfiguration to maintain optimal contact with the rail while accommodating steering movements and terrain irregularities
Solution Approach 2:
The system changes physical parameters such as contact pressure, contact area, and spatial configuration of the current collector to maintain stable electrical connection. By adjusting these parameters dynamically, the system preserves reliable connection despite variations in steering angle and terrain conditions
3Reliability
If precise alignment between the power rail and current collector is maintained, then electrical power delivery reliability is improved, but the system cannot accommodate terrain variations and steering deviations
Solution Approach 1:
The current collector is segmented into multiple independent contact elements that can individually adjust their alignment with the power rail. This allows the system to maintain precise electrical contact at each segment level while the overall structure accommodates terrain variations and steering deviations
Solution Approach 2:
The system transitions from rigid fixed alignment to dynamic adaptive alignment, where the current collector continuously adjusts its configuration to maintain optimal electrical contact. The flexible support structure enables real-time parameter changes to preserve power delivery reliability across varying operational conditions
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 system ensures consistent and reliable electrical contact across varying terrain, reducing wear and preventing arcing, while allowing for safe engagement and disengagement with power rails.
Implementation Method 1
The conductive fluid radially surrounds and contacts at least a portion of the piston along the central axis
Implementation Method 2
The bladder is pliable, connects the lower section with the upper section, and extends radially around the central axis
Implementation Method 3
a fluid suspension of an insulative fluid within a pliable bladder
Implementation Method 4
using magnetic attraction and fluid pressure to manage contact and prevent arcing
Data Source
AI summary
A slidable current collector has an array of terminals with carbon brushes for contacting conductor rails to deliver electrical power to a moving work machine. The terminals have upper sections with a conductive post, lower sections that include a reservoir of liquid metal, and bladders that connect the upper sections with the lower sections. Magnets surround outer shells of the terminals. Fluid above a threshold pressure fed into the bladders holds the upper sections apart from the lower sections and forces the magnets away from the conductor rails. Fluid below the threshold pressure allows the magnets to clamp the terminals to the conductor, lowers the conductive post into the liquid metal, and urges the carbon brushes against the conductor rails. The bladders provide a fluid suspension distributed across the array of terminals, enabling consistent electrical contact and wear for the carbon brushes.