Elastic-Metallic Bogie Suspension with Free Surfaces
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Solution Overview
Problem
Existing elastic suspension components for axleless bogie systems with independent wheels fail to meet the complex stress requirements due to increased freedom of the wheels, necessitating a solution that addresses vibration reduction and isolation effectively.
Innovation Solution
A method involving an elastic-metallic combination component with multiple free surfaces designed at different angles and positions to release stress in all directions, forming a Y-shaped structure with a spherical elastic material component to achieve high axial stiffness and low radial stiffness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If independent wheel sets are used in axleless bogie system, then curve passing capability and stability are improved, but the elastic suspension component experiences severe working conditions and cannot meet vibration reduction requirements
Solution Approach 1:
The elastic suspension component is divided into multiple elastic elements arranged in different directions (radial, axial, longitudinal, lateral). Each elastic element independently handles specific directional forces, allowing the system to adapt to complex movements of independent wheel sets while maintaining reliable vibration isolation performance.
Solution Approach 2:
The suspension component uses composite elastic elements combining rubber and metal materials. The rubber provides elasticity and vibration damping, while the metal reinforcement layers provide structural strength. This composite structure enables the component to withstand severe working conditions imposed by independent wheel sets while effectively reducing vibrations.
2Ease of manufacture
If traditional elastic suspension component design is used, then manufacturing simplicity is maintained, but the component cannot handle multi-directional stiffness requirements of axleless bogie
Solution Approach 1:
Instead of designing a complex monolithic component, the solution segments the suspension system into multiple simpler elastic elements oriented in different directions. Each element can be manufactured using standard processes, and their combined arrangement provides the required multi-directional stiffness characteristics.
Solution Approach 2:
The design transitions from considering only radial and axial stiffness to incorporating longitudinal and lateral dimensions. Elastic elements are arranged in four-dimensional space (three spatial dimensions plus time for dynamic response), enabling the component to handle complex multi-directional loads while maintaining manufacturing simplicity.
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 solution effectively reduces rubber stress, prolongs fatigue life, and meets various load conditions by adjusting stiffness ratios, ensuring comprehensive performance enhancement.
Implementation Method 1
multiple free surfaces of the elastic material component in the elastic-metallic combination component are provided, so that stress release is realized by the multiple free surfaces of the elastic material component
Implementation Method 2
The elastic material component is made of rubber material, and the rubber material is compounded with the metal component together by integral vulcanization
Implementation Method 3
at least one elastic material component is arranged in suspension system of the axleless bogie system
Implementation Method 4
The method and device for improving comprehensive performance of an elastic suspension component can effectively improve the comprehensive performance of the elastic suspension component in all directions, thereby meeting the requirement of vibration reduction and isolation
Data Source
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AI summary
Method and device for improving comprehensive performance of elastic suspension component of axleless bogie system, According to the structural feature of an axleless bogie, at least one elastic component is arranged in suspension system of the axleless bogie system; the elastic component is combined with a metallic component to form an elastic-metallic combination component; multiple free surfaces are provided for the elastic material component in the elastic-metallic combination component, stress release is realized by the multiple free surfaces of the elastic material component, therefore, the stress of the elastic material component of the axleless bogie in all directions is reduced. Providing multiple free surfaces of the elastic material component refers to designing free surfaces for the elastic material component at different angles and positions in the combination of elastic material component and the metallic component respectively according to the stress conditions of each component, so that stress can be released by the free surfaces when the elastic material component is stressed in all directions, and the stress of the elastic material component is reduced.