Rail Bogie Motor Mount with Conical Spring Adjustment
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Solution Overview
Problem
Current linear induction motor (LIM) mounting systems for rail vehicles are complex, expensive, and require time-consuming and costly height adjustments due to wheel wear, often resulting in seized components and damage.
Innovation Solution
A bogie assembly with a motor mount system featuring resilient conical and first springs, a core pin, and a nut configuration that allows for easy height adjustment and accommodates changes in wheel axle alignment, using elastomer materials and shims for precise gap control, reducing maintenance time and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional mounting systems with multiple linkages or shimming designs are used, then the LIM can be mounted, but the system becomes complex and expensive
Solution Approach 1:
The mounting system is divided into modular components: a motor support structure with mounting plates, adjustable shims, and fastening mechanisms. Each component can be independently manufactured, adjusted, and replaced, reducing overall system complexity while maintaining reliability
Solution Approach 2:
Adjustable shims are introduced as intermediary elements between the motor support structure and the bogie frame. These shims provide precise height adjustment and levelning capabilities without requiring complex mechanical linkages or cam mechanisms
2Manufacturing precision
If traditional mounting systems are used, then the LIM can be installed, but height adjustment takes many hours and requires expensive components
Solution Approach 1:
The mounting system incorporates adjustable and removable shims that allow dynamic reconfiguration of the motor height. This enables quick adjustments without time-consuming operations, as shims can be rapidly added or removed to achieve the required height precision
Solution Approach 2:
Shims are pre-manufactured in various thicknesses and can be pre-selected based on required adjustments. This preliminary preparation eliminates the need for time-consuming on-site adjustments, allowing maintenance personnel to quickly install the appropriate shim thickness
3Manufacturing precision
If wheel wear occurs, then the distance between primary and reaction rail changes, but regular readjustment is time-consuming and components may seize
Solution Approach 1:
The mounting system uses separable shims and fastening components that can be independently accessed and replaced. This segmentation allows maintenance personnel to quickly replace worn shims without disassembling the entire mounting structure, preventing seizure issues and reducing maintenance time
Solution Approach 2:
The design allows maintenance personnel to perform self-service adjustments by simply replacing shims with different thicknesses to compensate for wheel wear. This eliminates the need for complex adjustment procedures or specialized tools, making routine maintenance simple and quick
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 enables quick and efficient height adjustments, improves LIM performance by maintaining optimal gap distances, reduces maintenance efforts, and enhances durability by attenuating shocks and vibrations, while lowering the overall cost and complexity of the mounting system.
Implementation Method 1
Each one of the two motor mounts has a bogie interface, a motor interface, a first spring, a conical spring
Implementation Method 2
Being resilient, the first springs and the conical springs of the two motor mounts can accommodate a change in distance
Implementation Method 3
The core pin extends sequentially from the motor interface through the conical spring, then through the bogie interface and finally through the first spring where it is held in place by the nut
Implementation Method 4
tightening the nut on the core pin compresses both the first spring and the conical spring in opposite directions on different sides of the bogie interface
Implementation Method 5
both the conical spring and the first spring use an elastomer
Implementation Method 6
The conical spring further comprises a metallic component bonded to the elastomer
Data Source
AI summary
A bogie assembly for a rail vehicle comprises a bogie frame, two wheel axles supporting the bogie frame, a primary of a linear induction motor and two motor mounts. The two motor mounts are located proximate a different extremity of the primary and support the linear induction motor underneath the bogie frame. Each one of the two motor mounts has a bogie interface, a motor interface, a first spring, a conical spring, a core pin and a nut. The first spring is connected to the bogie interface on the bogie side while the conical spring is connected to the same bogie interface on the motor side. The core pin extends sequentially from the motor interface through the conical spring, then through the bogie interface and finally through the first spring where it is held in place by the nut on the other side of the first spring.