Rail Vehicle Energy Absorption Guide Element
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Solution Overview
Problem
Existing energy dissipation devices in rail vehicle technology face challenges such as large space requirements and unpredictable energy absorption sequences, leading to potential damage or derailment during severe collisions, as they often rely on deformation tubes that may wedge or require additional space for expansion.
Innovation Solution
The introduction of a guide element connected to the bearing block, which protrudes into the deformation tube and provides axial guidance, ensuring predictable plastic deformation and maximum energy absorption within minimal installation space by preventing the bearing block from tilting and allowing defined energy consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a deformation tube is used as an energy-absorbing device, then impact energy is converted into deformation work and heat, but the device requires additional space for expansion and may wedge during deformation
Solution Approach 1:
Instead of allowing the deformation tube to expand outward (which requires additional space), the patent inverts the approach by using a deformation tube with a reduced cross-section that deforms inward, eliminating the need for expansion space while still achieving energy absorption through plastic deformation
Solution Approach 2:
The deformation tube is nested within the bearing block structure, with the tube's reduced cross-section allowing it to deform within the existing space constraints. The guide element is integrated into the bearing block, creating a compact nested arrangement that eliminates the need for additional installation space
2Loss of energy
If a deformation tube is used for energy absorption, then impact energy is dissipated, but the sequence of events during energy consumption is unpredictable
Solution Approach 1:
A guide element is introduced as an intermediary component between the bearing block and the deformation tube. This guide element controls the deformation process by guiding the tube's movement, ensuring a predictable and defined sequence of events during energy absorption while maintaining effective energy dissipation
3Loss of energy
If the deformation tube expands during energy absorption, then maximum energy consumption is achieved, but the bearing block may tilt and the sequence of events becomes undefined
Solution Approach 1:
The guide element serves as a mediator that prevents the bearing block from tilting during deformation. By constraining the deformation tube's movement path, the guide element maintains bearing block stability while allowing the tube to deform and absorb energy effectively
Solution Approach 2:
The deformation tube is designed with a reduced cross-section at specific locations to control where and how deformation occurs. This local quality variation ensures that energy absorption happens in a controlled manner without causing unwanted tilting or instability in the bearing block structure
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 solution enables maximum energy dissipation with a definable sequence of events during crashes, reducing the risk of damage and ensuring efficient energy absorption without the need for additional space, thus protecting the vehicle underframe effectively.
Implementation Method 1
the impact energy is converted into deformation work and heat in a destructive manner by a defined plastic deformation of an element (deformation tube)
Data Source
Figure 1
Figure 2a
Figure 2b~2c
AI summary
The device has bearing blocks (2, 3) comprising an interface (4), by which impact forces are introduced into the bearing blocks. The bearing blocks have a guide element (6), whose clutch plane side end section (6b) is connected with a vehicle body side end section (3a) of a bearing block part of the bearing block (3). A vehicle body side end section (6a) of the guide element partially extends into a section (5.2) of a deformation tube (5) and rests on an inner surface of the deformation tube section, which lies in a direction of a vehicle body.