Connecting Ring Snap-Fit Sealing for Railway Brake Particle Capture
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Solution Overview
Problem
Existing railway braking systems emit atmospheric particles during operation, and previous solutions for particle capture, such as the friction assembly with a connecting ring and suction device, face challenges in secure mounting and effective sealing, particularly when the manifold block is an integral part of the brake head, limiting access and efficiency.
Innovation Solution
The friction assembly incorporates a manifold block with a cavity and holes aligned with secondary channels, allowing the connecting ring to slide and secure via a snap-fit mechanism, ensuring reliable particle discharge to the suction device, and includes a return mechanism to enhance sealing and prevent air leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the manifold block is made as an integral part of the brake head to simplify structure, then device complexity is reduced, but access for mounting and sealing the connecting ring becomes difficult
Solution Approach 1:
The brake head is segmented into an integral manifold block and a separate connecting ring component. The connecting ring can be independently mounted and sealed onto the manifold block through the secondary channel opening, allowing access and maintenance while maintaining the integrated design benefits.
2Reliability
If the connecting ring is securely mounted to prevent particle leakage, then sealing effectiveness is improved, but assembly and disassembly becomes more difficult
Solution Approach 1:
A sealing element is pre-installed in the secondary channel of the brake head before the connecting ring is mounted. This preliminary sealing preparation ensures effective sealing upon assembly while maintaining relatively simple installation and disassembly procedures.
Solution Approach 2:
The connecting ring incorporates a retaining mechanism that allows for dynamic assembly and disassembly. The retaining mechanism can be engaged or disengaged to secure or release the connecting ring, providing reliable sealing during operation while enabling maintenance when needed.
3Productivity
If the suction device is positioned close to the particle emission area to improve capture efficiency, then particle capture effectiveness is improved, but the risk of air leakage and reduced sealing effectiveness increases
Solution Approach 1:
The connecting ring with integrated sealing elements is nested within the secondary channel of the brake head, creating a nested sealing structure. This nested configuration ensures effective sealing at the connection interface between the suction device and the brake head, preventing air leakage while maintaining close proximity for efficient particle capture.
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 ensures reliable and efficient particle capture and discharge, improving the sealing between the connecting ring and the plate, and facilitates easy assembly and disassembly, enhancing the overall performance of the braking system.
Implementation Method 1
a return mechanism which presses the ring against the plate so as to prevent air leakage
Data Source
AI summary
This relates to a friction assembly including: a brake head including a secondary channel, a friction plate including a primary channel and adapted to be fixed to the brake head, and a connecting ring arranged in the secondary channel and establishing a connection with the primary channel when the primary channel is aligned with the secondary channel; the friction assembly further including a manifold block having a cavity connected to a suction device, and forming an integral part of the brake head. The block has a hole connecting the cavity to the secondary channel, and the friction assembly includes a securing mechanism for securing the ring to the block when the ring is arranged in the hole and in the secondary channel.