Mobile Waterjet Rail Repair for Low-Noise Surface Reprofiling
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Solution Overview
Problem
Existing methods for repairing damaged railroad tracks, such as using large grinding trains, are expensive, noisy, and ineffective around corners or junctions, and do not provide a clean and efficient solution for maintaining railway rails.
Innovation Solution
A mobile liquid jet system using ultra-high pressure liquid streams to treat damaged or worn railway rails, capable of operating on the move and including a translatable frame with multiple liquid jet processing heads, a positioning system, and a portable truck-mounted unit with deployable wheels, allowing for precise and flexible rail processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If large grinding trains are used to repair railroad tracks, then the tracks can be machined and restored, but the process becomes expensive, noisy, and ineffective around corners or junctions
Solution Approach 1:
The rail repair system is divided into multiple independent liquid jet processing heads, each capable of operating autonomously. This segmentation allows the system to navigate complex track geometries including curves and junctions by positioning individual heads at optimal angles, while maintaining high restoration quality through precise liquid jet application on each segment of the rail.
Solution Approach 2:
The system employs dynamically adjustable liquid jet processing heads that can change their orientation and position in real-time. This dynamic capability enables the system to adapt to varying rail geometries such as curves and junctions, while maintaining consistent processing quality through real-time adjustment of jet angle and distance from the rail surface.
2Manufacturing precision
If large grinding trains are used to repair railroad tracks, then the tracks can be machined and restored, but the process becomes loud and unpleasant
Solution Approach 1:
The system replaces traditional mechanical grinding with liquid jet technology. High-pressure liquid jets erode and reshape the rail surface through hydraulic action rather than mechanical contact, eliminating the loud noise and sparks characteristic of grinding operations while maintaining effective rail restoration capability.
Solution Approach 2:
The system uses high-pressure hydraulic liquid jets to perform rail restoration. The hydraulic energy concentrated in the liquid jet stream provides sufficient material removal capability without mechanical contact, thereby eliminating noise and sparks while achieving the required restoration quality.
3Manufacturing precision
If traditional methods are used to repair railroad tracks, then the tracks can be restored, but the process is expensive and time-consuming
Solution Approach 1:
The system maintains continuous liquid jet application on the rail surface during movement, eliminating the stop-start nature of traditional grinding operations. This continuous action allows the system to move along the rail at steady speed, performing restoration work continuously and efficiently, thereby reducing both time and cost while maintaining high precision.
Solution Approach 2:
The system is designed to be self-contained and mobile, carrying its own liquid supply and processing equipment. This self-service capability eliminates the need for expensive infrastructure and setup associated with traditional grinding trains, allowing rapid deployment and operation that reduces overall repair time and cost while maintaining restoration quality.
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 provides a quick, inexpensive, and environmentally friendly method to recondition or re-profile rails, reducing noise and heat input, and can operate in various environments, including around corners and junctions, with high accuracy and minimal rework, extending the lifetime of the rails.
Implementation Method 1
Liquid is forced through a small orifice at high velocity to concentrate a large amount of energy on a small area. To cut hard materials, a liquid jet can be 'abrasive' or include abrasive particles for increasing cutting ability.
Implementation Method 2
Liquid pressurization systems produce high pressure (e.g., 20,000 to 90,000 pounds per square inch (PSI)) streams of liquid for various applications.
Data Source
AI summary
A translatable, high pressure liquid jet system for a rail cleaning or surface treatment operation, the system comprising: a translatable frame configured to maintain mechanical contact with a rail; a liquid jet processing head affixed to the frame and configured to maintain a distance from the rail and provide a liquid jet that contacts the rail; a high pressure liquid pump in fluid communication with the liquid jet processing head, the high pressure liquid pump configured to supply pressurized liquid to the liquid jet processing head; an abrasive feed system in fluid communication with the liquid jet processing head; and at least one nozzle for directing a jet of water and abrasive onto a portion of the rail for cleaning or treating the rail.