Railway Disc Brake Friction Assembly With Sealed Particle Suction
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Solution Overview
Problem
Existing railway disc brake friction assemblies fail to effectively prevent air leakage at the interface between the sole and sole holder, leading to reduced suction efficiency of particles emitted during braking.
Innovation Solution
Incorporation of a return mechanism, such as a spring or helical spring, to press the junction ring against the profile, ensuring a seal between the junction ring and the sole, and between the sole support and sole, enhancing particle suction efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a suction device is placed near the emission zone to capture particles, then particle collection efficiency is improved, but air leakage at the interface between sole and sole holder reduces suction effectiveness
Solution Approach 1:
The patent employs a flexible sealing ring made of elastomeric material that can deform to conform to the interface between the sole and sole holder. This flexible membrane approach creates an effective seal that prevents air leakage while maintaining the suction device's ability to capture particles at the friction interface.
Solution Approach 2:
The sealing ring acts as an intermediary element between the rigid sole and sole holder components. This intermediate sealing element fills gaps and irregularities at the interface, preventing air leakage without interfering with the suction device's particle collection function.
2Reliability
If the junction ring is pressed against the profile to ensure sealing, then seal effectiveness is improved, but device complexity increases due to additional return mechanism components
Solution Approach 1:
The return mechanism uses a spring element that applies continuous elastic force to press the sealing ring against the interface between the sole and sole holder. This counteracting force ensures the sealing ring remains in contact with the mating surfaces, maintaining seal effectiveness under various operating conditions.
Solution Approach 2:
The spring-based return mechanism is a self-actuating system that automatically maintains sealing pressure without requiring external control systems. The elastic deformation of the spring provides continuous sealing force as long as the components are assembled, making the system self-regulating and simple in operation.
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 return mechanism ensures a tighter seal, allowing for more effective suction of particles emitted during braking, improving the overall efficiency of the friction assembly.
Implementation Method 1
Incorporation of a return mechanism, such as a spring or helical spring, to press the junction ring against the profile
Implementation Method 2
a suction device, powered by a pump, near an emission zone of the particles from the rubbing pad of the friction sole
Data Source
Figure 1~2
Figure 3~5
Figure 6~7
AI summary
The invention relates to the braking of rolling railway stock. More specifically, the invention relates to a friction assembly (1) for a railway disc brake system, said friction assembly (1) comprising, on the one hand, a sole holder (3) comprising an upper face (31) with a receiving slide (5), and a lower face (32), and, on the other hand, at least one sole (2) made of friction material and comprising a first face (21) which is the friction face, and a second face (22) provided with a profile member (4) configured to cooperate with the receiving slide (5), the sole (2) comprising at least one duct (28) establishing sealed communication between a first space (El) bordered by the first face (21) and a second space (E2) bordered by the second face (22), the friction assembly (1) further comprising at least one central axis (A) through-hole (38) which is provided in the sole holder (3) and located opposite the at least one duct (28), and at least one junction ring (8) which is arranged in the at least one through-hole (38) and forms a junction with the at least one duct (28). The friction assembly (1) comprises a return mechanism (90) which is capable of pressing the at least one junction ring (8) against the profile member (4).