Bevel-End Steel Rail Joint Design for Thermal Stress and Wheel Impact
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Solution Overview
Problem
Standard steel railways solve thermal stress issues but introduce impact problems between wheels and rails, while seamless steel railways reduce impact but fail to completely eliminate thermal stress and increase construction and maintenance costs, posing safety risks and inefficiencies.
Innovation Solution
Bevel-end steel railways employ a small acute angle bevel rail gap coupling and reserved longitudinal rail gaps to eliminate impact and thermal stress, featuring a compatible and complementary design with standard steel rails for cost-effective construction and renovation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If standard steel railways with transversal rail gaps are used, then thermal stress of steel rails is solved, but impact between wheels and rails occurs
Solution Approach 1:
The patent applies asymmetry by using bevel ends instead of flat ends at the rail joints. The bevel angle creates an asymmetric geometry where the rail ends slope toward each other, allowing wheels to roll smoothly over the joint without impact while still accommodating thermal expansion through longitudinal gaps.
Solution Approach 2:
The patent transitions from the traditional flat-end configuration (zero-dimensional contact) to a bevel-end configuration (one-dimensional sloped contact). This dimensional change allows the wheel to gradually transition from one rail to the next, eliminating impact while maintaining thermal stress relief through longitudinal gaps.
2Object-affected harmful factors
If seamless steel railways are used to eliminate impact between wheels and rails, then impact is reduced, but thermal stress problems persist and construction costs increase
Solution Approach 1:
The patent segments the seamless rail into sections with bevel ends that create small longitudinal gaps. These segmented gaps allow thermal expansion and contraction while the bevel geometry eliminates impact, combining the benefits of seamless rails with thermal stress relief.
Solution Approach 2:
The patent changes the geometric parameters of the rail ends from flat (0° angle) to bevelled (small acute angle). This parameter change allows the rail to accommodate thermal expansion through longitudinal gaps while eliminating impact through the sloped transition surface.
3Object-affected harmful factors
If seamless steel railways with welding and locking are used, then impact between wheels and rails is reduced, but construction and maintenance costs significantly increase
Solution Approach 1:
The patent uses simple bevel-end steel rails that can be easily manufactured and replaced without complex welding or locking mechanisms. The simplified design reduces manufacturing complexity and maintenance costs while achieving the same impact elimination effect.
Solution Approach 2:
The patent extracts the complex welding and locking mechanisms from the rail joint design, retaining only the essential bevel-end geometry and small longitudinal gaps. This simplification eliminates costly manufacturing and maintenance requirements while preserving the impact elimination benefit.
4Object-affected harmful factors
If seamless steel railways are used, then impact between wheels and rails is reduced, but safety risks increase due to welding quality and fastener reliability
Solution Approach 1:
The patent uses simple bevel-end rails without welding or complex fastening systems. The simplified design eliminates potential failure points associated with weld quality and fastener reliability, improving overall system reliability while maintaining impact elimination.
Solution Approach 2:
The patent removes welding and locking mechanisms from the rail joint design, keeping only the essential bevel-end geometry. This extraction of complex components eliminates the reliability issues associated with weld quality and fastener failure while preserving the impact elimination benefit.
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
Bevel-end steel railways completely eliminate wheel-rail impact and thermal stress, reducing maintenance and construction costs, enhancing safety, reliability, and operational efficiency, allowing for flexible construction and renovation, and enabling smooth, quiet, and fast train travel.
Implementation Method 1
transversal rail gaps have been reserved between steel rails to solve the problem of thermal stress of steel rails
Data Source
AI summary
A beveled-end steel railroad. The use of small-acute-angle oblique-gap connection design and vertical gap reservation design can solve both the problem of impact between wheels and rails and the problem of thermal stress between steel rails. The design containing both beveled ends and flat ends that are complementary to each other can further greatly reduce railroad construction and reformation costs. The beveled-end steel railroad has a simple structure, is secure, reliable, and durable, can provide a fast, stable, and non-noisy driving effect, can implement highly-efficient and energy-saving operation, is easy to construct and reform, can be easily repaired and maintained, has a significant advantage in costs, and can implement both good performance and good profitability.