Monorail Train Suspension Damping Unit for Vibration Isolation
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Solution Overview
Problem
The rigid connection between the suspension device and the train body in suspended monorail trains leads to direct transmission of vibrations and noise from the bogie to the train body, affecting riding comfort and increasing noise levels.
Innovation Solution
A damping unit comprising an inner supporting member, an intermediate buffer member, and an outer supporting member, nested successively, which are connected to the connection base and the bolster seam, allowing for elastic deformation and buffering of vibrations and noise, thereby reducing the direct transmission of vibrations and noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the suspension device is rigidly connected to the train body through bolts, then the structural strength and stability are improved, but the vibration and noise transmission from the bogie to the train body increases
Solution Approach 1:
The patent introduces a damping unit as an intermediary component between the suspension device and the train body. This damping unit includes a damper and a connecting structure that mediates the connection, allowing force transmission while filtering out vibrations and noise. The intermediary structure prevents direct rigid coupling, thereby reducing harmful transmissions while maintaining structural integrity.
Solution Approach 2:
The damping unit employs composite material structures combining rigid components (for strength) and damping materials (for vibration absorption). The connecting structure integrates elements with different mechanical properties to achieve both structural strength and vibration isolation, resolving the contradiction between strength and harmful factor transmission.
2Reliability
If the suspension device is rigidly connected to the train body, then the connection reliability is improved, but the riding comfort deteriorates due to direct vibration transmission
Solution Approach 1:
The damping unit serves as a mediator that maintains reliable connection while improving riding comfort. The damper component provides controlled flexibility, allowing the connection to remain reliable under normal conditions while isolating passengers from harmful vibrations and noise during operation.
Solution Approach 2:
The patent changes the mechanical parameters of the connection by introducing damping elements with specific stiffness and damping coefficients. This allows the connection to exhibit different characteristics under different operating conditions - maintaining reliability for static loads while reducing vibration transmission for dynamic loads, thereby improving riding comfort.
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 damping unit effectively reduces vibrations and noise levels, enhancing the riding comfort of the train by providing a non-rigid connection between the bogie and the train body, thereby improving the overall experience.
Implementation Method 1
an intermediate buffer member, which is elastically deformable, is clamped between the inner supporting member and the outer supporting member
Implementation Method 2
The damping unit effectively reduces vibrations and noise levels, enhancing the riding comfort of the train
Data Source
AI summary
A bolster beam is correspondingly connected to a connection base by means of a damping unit; the radial dimensions of an outer wall of an inner supporting member and an inner wall of an outer supporting member gradually decrease from one end to the other end in a vertical direction; one of the inner supporting member and the outer supporting member is connected to the connection base, and the other one is connected to the bolster beam; when in use, the inner supporting member and the outer supporting member tend to be close to each other, and since surfaces, close to each other, of the two are configured to be tapered, the two can-not be relatively separated; when getting closer to each other, the inner supporting member and the outer supporting member produce a compression action on an intermediate buffer member, and the intermediate buffer member is elastically deformable.