Rail Brake Pressure-Reducing Mechanism for Faster Release
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Solution Overview
Problem
In three-pressure braking systems for railway vehicles, achieving equal pressure intensities in the first and second working chambers requires multiple release actions, leading to low release efficiency and affecting vehicle operation.
Innovation Solution
A pressure braking device incorporating a three-pressure braking mechanism and a pressure reducing mechanism, where the pressure reducing mechanism includes a cylinder block, a pressure reducing piston, a partition member, and a pressure reducing chamber, allowing the pressure reducing piston to switch between preset positions to equalize pressures efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple release actions are used to equalize pressure in three-pressure braking system, then pressure equalization can be achieved, but release efficiency is low
Solution Approach 1:
The patent introduces a pre-chamber connected to the second working chamber through a communication hole. Before the main pressure equalization process, the pre-chamber is pre-filled with air at the required pressure through the third working chamber. This preliminary action allows the diaphragm to respond more quickly and reduces the number of release actions needed, thereby improving release efficiency while maintaining reliable pressure equalization.
Solution Approach 2:
The second working chamber is divided into two parts: the main second working chamber and the pre-chamber. This segmentation allows independent pressure control - the pre-chamber can be pressurized independently through the third working chamber, while the main chamber handles the primary braking function. This division enables faster pressure equalization by providing a pre-prepared pressure source.
2Ease of operation
If three-pressure braking mechanism is used, then braking control is achieved, but release efficiency is affected
Solution Approach 1:
The pre-chamber is pre-pressurized through the third working chamber before the braking release is initiated. This preliminary action ensures that when the braking release is commanded, the diaphragm already has the necessary pressure differential to move quickly, reducing the time required for complete release while maintaining the three-pressure control mechanism's braking functionality.
Solution Approach 2:
The pre-chamber acts as an intermediary between the third working chamber and the second working chamber. It receives pressure from the third chamber and transfers it to the diaphragm, facilitating smoother and faster pressure equalization. This intermediary structure decouples the complex three-pressure control from the release mechanism, improving release efficiency without compromising braking control.
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 solution enables quicker equalization of pressure intensities in the first and second working chambers, significantly improving the release efficiency of the braking system and enhancing railway vehicle operation.
Implementation Method 1
when the pressure reducing piston is located in the first preset position, the second working chamber, the second chamber, the pressure reducing passage, and the pressure reducing chamber are in communication with each other; and in a situation that the pressure reducing piston is located in the second preset position, the pressure reducing piston blocks the communication between the second chamber and the pressure reducing passage
Data Source
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AI summary
Embodiments of the present disclosure provide a pressure braking device, a braking system, and a railway vehicle, relating to the field of braking. The pressure braking device comprises a three-pressure braking mechanism and a pressure reducing mechanism, the three-pressure braking mechanism comprises a first cylinder block, and the first cylinder block has a first working chamber and a second working chamber isolated from each other; the pressure reducing mechanism is in communication with the first cylinder block, and the pressure reducing mechanism comprises a cylinder block, a pressure reducing piston, a partition member, and a pressure reducing chamber; the pressure reducing piston has a first end face and a second end face opposite to each other, and a side wall of the pressure reducing piston is provided with a first groove, and an area of the first end face is greater than that of the second end face; the first end face and the inner wall of the cylinder block define a first chamber, and the second end face and the inner wall of the cylinder block define a second chamber; the first cylinder block has a first working chamber and a second working chamber isolated from each other; the partition member is provided in the working passage, and the partition member is configured to partition the working passage into an outside passage and a pressure reducing passage, which can improve the release efficiency of the braking.