Integrated Air Brake Pressure Limiting for Compact Three-State Control
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Solution Overview
Problem
Current railway vehicle brake systems require a complex and larger dimensioned pressure limiting mechanism that uses two valves in combination, which complicates the structure and increases size.
Innovation Solution
An inshot pressure limiting mechanism comprising a valve body, an inshot valve, an inflation valve, and a pressure limiting member, where the pressure limiting member drives the valves to switch between open and closed states based on pressure changes, allowing for three pressure limiting states with a simpler structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If two valves in combination are used to realize pressure limiting, then pressure limiting function is achieved, but structure becomes complicated and dimension increases
Solution Approach 1:
The patent combines two separate valves (inshot valve and inflation valve) and their pressure limiting functions into a single integrated valve body with a unified pressure limiting chamber. This merging approach maintains the pressure limiting function while simplifying the overall structure by eliminating the need for separate valve assemblies and reducing the number of components.
Solution Approach 2:
The single valve body performs multiple functions: it houses both the inshot valve and inflation valve, contains a pressure limiting chamber that serves both valves, and provides integrated pressure limiting control for both air outlets. This multi-functionality reduces structural complexity while maintaining comprehensive pressure limiting capability.
2Reliability
If two valves in combination are used to realize pressure limiting, then pressure limiting function is achieved, but device dimension increases
Solution Approach 1:
The patent employs a nested structure where the inshot valve and inflation valve are housed within a single valve body, and their respective pressure limiting functions share a common pressure limiting chamber. This nesting arrangement allows both valve systems to coexist in a compact configuration, reducing the overall device dimension while maintaining full pressure limiting functionality.
Solution Approach 2:
By merging the two separate pressure limiting mechanisms into a single integrated chamber and valve body, the patent reduces the total volume occupied by the pressure limiting device. The shared pressure limiting chamber eliminates redundant structural elements and reduces the overall footprint of the device.
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 quick air output, controlled air output speed, and maintained pressure states by switching between open and closed chamber states, addressing the complexity and size issues of existing systems.
Implementation Method 1
the pressure limiting member is configured to drive the inshot valve and the inflation valve to move along a direction from the first chamber to the pressure limiting chamber during the pressure increase in the pressure limiting chamber, or the pressure limiting member may be configured to drive the inshot valve and the inflation valve to move along a direction from the pressure limiting chamber to the first chamber during the pressure decrease in the pressure limiting chamber
Data Source
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AI summary
Embodiments of the present disclosure provide an inshot pressure limiting mechanism and an air brake system, relating to the field of air brake systems, aiming at addressing the problems that the pressure limiting structure needs to adopt two valves in combination, and has a larger dimension. The inshot pressure limiting mechanism comprises a valve body, an inshot valve, an inflation valve, and a pressure limiting member; the valve body is provided with an air inlet, a first chamber, a second chamber, and an air outlet; the inshot valve is provided in the first chamber; the inflation valve is provided in the second chamber, the inshot valve and the inflation valve are both connected to the pressure limiting member, and the pressure limiting member is configured to drive the inshot valve and the inflation valve to move during the pressure change in the pressure limiting chamber. The air brake system comprises an inshot pressure limiting mechanism. By simultaneously opening the first chamber and the second chamber, the air outlet may output the pressured air more quickly; by closing the first chamber, and opening the second chamber, the output speed in the air outlet may be controlled; by simultaneously closing the first chamber and the second chamber, the current pressure state of the air outlet may be maintained, so as to realize the switching of three pressure limiting states.