Rail Drive Station Layout for Friction Propulsion and Lower Track Load
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Solution Overview
Problem
Current rail transport systems for bulk materials are inefficient in terms of energy and labor usage, environmentally impactful, and lack reliability, especially when handling multiple trains and varying terrain conditions.
Innovation Solution
A rail transport system with drive stations that utilize a drive assembly with a support structure, drive units, and spring elements to control frictional contact between drive tires and side plates, allowing for efficient movement and maintenance, and incorporating dynamic and mechanical braking systems for safety and control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If conventional railroad systems use heavy drivers or locomotives to move heavily loaded cars, then sufficient friction and contact force are achieved, but the weight of rail and ballast requirements increase significantly
Solution Approach 1:
Instead of having heavy locomotives push or pull cars from the front, this patent applies friction drive wheels at the rear of each car that push the car forward from behind. This inversion of the traditional propulsion method eliminates the need for heavy locomotives and reduces rail and ballast weight requirements while still achieving sufficient friction force for moving loaded cars.
2Power
If multiple drivers are used in long trains to move large tonnage, then sufficient power is achieved, but the device complexity and capital cost increase
Solution Approach 1:
The train is divided into individual car units, each equipped with its own friction drive wheel at the rear. This segmentation allows each car to be propelled independently without requiring multiple heavy locomotives, reducing device complexity while maintaining the power needed to move large tonnage through distributed propulsion across all cars.
3Ease of manufacture
If conventional railroad cars are loaded in batch process one car at a time, then loading is completed, but the productivity and cost-effectiveness decrease
Solution Approach 1:
The friction drive wheel system enables continuous propulsion of multiple cars through the loading zone. Instead of stopping to load one car at a time, multiple cars can be moved continuously through the loading area, allowing for more efficient batch loading operations and improving overall productivity without compromising the ease of loading individual cars.
4Device complexity
If single dual track train systems are used, then infrastructure cost is reduced, but only one train can be used on the system at a time
Solution Approach 1:
The friction drive wheel system allows trains to start and stop more efficiently at loading and unloading points. This dynamic control capability enables better scheduling and utilization of single dual track systems, allowing multiple trains to operate more closely together without requiring additional track infrastructure, thereby improving train utilization while maintaining simple infrastructure.
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 enhances efficiency, reliability, and cost-effectiveness by reducing component costs, improving manufacturability, and enabling smooth operation on both flat and inclined surfaces while maintaining safety through controlled braking mechanisms.
Implementation Method 1
a drive tire adapted to frictionally contact a side drive plate of at least one of the cars for imparting a driven moment to the car
Implementation Method 2
a spring element operatively located between the support and the drive unit to control squeeze force between the contacting drive tire and side plate of the car
Data Source
Figure 1
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AI summary
The present invention generally relates to a rail transport system having no internal drive, and in particular to an improved rail transport system for conveying bulk materials. The rail transport system includes horizontal and vertical drive stations that include a drive tire that rotates on a plane parallel to the track. In this arrangement, force is applied on a different plane than earlier systems, and the reaction force is separated out of the tensioning device. The improvements of the drive stations provide for a reduction of steel used in the system, improved manufacturability and, therefore, reduction in system component costs as compared to previous drive stations. Moreover, the drive stations allow for improved maintainability and access to the drive tires.