Induction Generator Mounting on Railway Car Inner Bearings
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Solution Overview
Problem
Railway cars with bearings on the inner side pose a challenge for mounting generators due to frequent wheel reconditioning needs and limitations in power supply, making it difficult to install a generator on the outer side.
Innovation Solution
The stator is mounted to the inner side of one of the bearings in axial abutment, within a cylindrical housing with radially extending flanges for secure attachment and sealing, allowing for a compact induction generator system with a rotor and electrical conductors, including permanent magnets, connected to an inverter and battery for efficient electricity generation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the generator is mounted on the outer side of the bearings, then the wheels can be reconditioned less frequently, but the stator cannot be properly restrained from rotation when bearings are on the inner side
Solution Approach 1:
Instead of mounting the generator on the outer side of the bearing (conventional approach), the patent inverts the mounting location to the inner side of the bearing. The stator is mounted to the inner side of the bearing in axial abutment, allowing the generator system to function properly with inner-side bearing configuration while avoiding the wheel reconditioning issue.
Solution Approach 2:
The patent introduces a housing as an intermediary component between the stator and the bearing. The housing has a radially outwardly extending circumferential flange that is mounted to the inner side of the bearing, providing a stable mounting surface for the stator while maintaining the inner-side bearing configuration.
2Reliability
If the stator is mounted to the inner side of the bearing, then the generator system becomes compact and reliable, but the mounting structure becomes more complex
Solution Approach 1:
The patent combines multiple functions into the housing structure: it provides mechanical support for the stator, acts as a seal for the bearing interior, and offers mounting surfaces through its flanges. This integration reduces the need for separate components and simplifies the overall assembly despite the complex mounting requirements.
Solution Approach 2:
The housing serves multiple functions simultaneously: structural support, sealing, and mounting. The radially outwardly extending circumferential flange provides both structural support and a mounting surface, while the radially inwardly extending circumferential flange provides sealing. This multi-functionality reduces the total number of components needed.
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 configuration provides a robust, reliable, and easy-to-install generator system that can generate electricity efficiently, reducing the need for frequent wheel reconditioning and enabling power supply for railway cars with inner-side bearings.
Implementation Method 1
an induction generator (5) comprising magnets (7) and electrical conductors (6) for generating electricity
Data Source
AI summary
A railway car fitted with an induction generator comprising magnets and electrical conductors for generating electricity, comprising a chassis comprising at least one axle with two wheels, wherein the axle is mounted in two bearings located near the two sides of the railway car, wherein the wheels are located on the outer side of the bearings, and wherein the generator comprises a rotor and a substantially cylindrical stator, which stator extends concentrically around the rotor, wherein the rotor is fixedly mounted around and on the axle, wherein the stator is mounted to the inner side of one of the bearings, in axial abutment therewith.