Railway Switch Machine Test Bench With Hydraulic Braking Module
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Solution Overview
Problem
Existing test methods for railway switch machines struggle to accurately simulate the kinematic behavior of switch machines in degraded conditions, such as wear, misalignment, and environmental factors, which are crucial for determining reliability and maintenance needs.
Innovation Solution
A test bench with a rigid frame, movable inner and outer rails, a braking module with hydraulic friction pads, and a climatic chamber that simulates real-world conditions by varying temperature and humidity, allowing for the application of controlled braking forces and repetitive testing to measure key parameters like current, voltage, torque, and temperature.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a test bench uses a rigid frame with movable inner rails to simulate real switch machine conditions, then the reliability of the test results is improved, but the device complexity increases due to the need for precise mechanical assemblies and braking modules
Solution Approach 1:
The test bench is divided into distinct functional modules: a rigid frame structure, movable inner rails, outer rails, a braking module with hydraulic actuation, and a climatic chamber. Each module can be independently designed, tested, and maintained, which manages complexity while achieving reliable simulation of real switch machine conditions.
Solution Approach 2:
The braking module acts as an intermediary element that applies controlled braking forces to the inner rails through hydraulic friction pads. This mediator enables precise control of mechanical forces during testing without requiring direct complex interaction between the test control system and the switch machine under test.
2Adaptability or versatility
If the test bench includes a climatic chamber to simulate environmental conditions, then the adaptability of the test to real-world scenarios is improved, but the device complexity and cost increase
Solution Approach 1:
The climatic chamber is designed to provide multiple environmental conditions (temperature, humidity, and potentially other atmospheric parameters) within a single integrated structure. This multi-functional approach allows the test bench to simulate various real-world environmental scenarios without requiring separate dedicated chambers for each condition, thereby managing complexity while enhancing adaptability.
3Manufacturing precision
If the braking module uses hydraulic friction pads to apply braking force, then the precision of force application is improved, but the manufacturing complexity and maintenance requirements increase
Solution Approach 1:
The braking module employs a hydraulic actuation system with friction pads that can be precisely controlled through hydraulic pressure regulation. This hydraulic mechanism provides smooth, adjustable braking forces with high precision while using well-established hydraulic components that are relatively straightforward to manufacture and maintain compared to alternative precision force application methods.
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
Enables realistic simulation of in-field conditions, allowing for the accurate monitoring of switch machine performance and health trends, facilitating condition-based maintenance and predictive analysis.
Implementation Method 1
a braking module connected to the pair of inner rails, the braking module is adapted to generate a braking force that brakes the movement of the inner rails
Implementation Method 2
the friction pads or pliers are hydraulically moved with respect to the braking module
Data Source
Figure 1~3
AI summary
The present invention relates to a test bench for a switch machine of a railway switch, the test bench (1) comprising: a rigid frame (3) adapted to receive the switch machine (13), the switch machine comprising a switch motor adapted to move a driving shaft; a pair of outer rails (7) fixed to the frame, wherein the switch machine (13) is adapted to be fixed to the outer rails; a pair of inner rails (9), which are movable with respect to the outer rails (7) between a first end position and a second end position, the inner rails (9) being adapted to be connected to the driving shaft of the switch machine (13); a braking module (40) connected to the pair of inner rails (9), the braking module is adapted to generate a braking force that brakes the movement of the inner rails.