Hydrodynamic Brake Pneumatic Control With Quick Air Bleed Safety Valve
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Solution Overview
Problem
Existing pneumatic control systems for hydrodynamic brakes lack fail-safe functionality and efficient bleeding mechanisms, leading to potential operational safety issues and prolonged bleed times.
Innovation Solution
A pneumatic controlling device with a safety valve actuating a quick air bleed valve, combined with a controllable throttle or mechanically pilot-controlled valve, ensures rapid and safe bleeding of the working-pressure line by enabling complete pressure relief and reducing the likelihood of failure through redundant valve configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If a parallel connection of multiple inlet valves and outlet valves is used to increase the opening cross-section, then air can be admitted and bled more quickly, but the operational safety is reduced due to increased complexity and potential failure points
Solution Approach 1:
The patent extracts the safety function into a separate, dedicated safety valve that operates independently from the main inlet and outlet valves. This safety valve provides a direct bleed path from the working-pressure line to the air bleed exit, ensuring that even if the main valves fail, the system can still be bled safely and quickly without relying on the complex parallel valve configuration.
2Loss of time
If a pilot-control stage with 2/2-way valves is used to enable quick relief function, then the bleed time is shortened, but the likelihood of failure increases due to the complexity of the pilot-control stage
Solution Approach 1:
The patent employs a simple, robust safety valve design that prioritizes reliability over complex control mechanisms. The safety valve is designed as a straightforward component with a direct bleed path, avoiding the use of pilot-control stages and 2/2-way valves that are prone to failure. This approach accepts a slightly less optimized bleed path in exchange for dramatically improved reliability and reduced failure likelihood.
3Reliability
If multiple valves are used to ensure fail-safe functionality, then the safety is improved, but the device complexity and structural space increase
Solution Approach 1:
The patent segments the valve functions into distinct, independent components: main inlet valves, main outlet valves, and a dedicated safety valve. Each valve type is optimized for its specific function, and the safety valve is positioned independently to provide a direct bleed path. This segmentation allows the system to achieve fail-safe functionality without requiring complex interconnections or pilot-control mechanisms between valves, thereby reducing overall system complexity.
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 quick and reliable switching off of the hydrodynamic brake, ensuring safe and efficient braking performance by reducing the risk of failure and minimizing bleed time, while also reducing the complexity and structural space required for pilot control.
Implementation Method 1
compressed air being applied to a storage tank filled with a working fluid of the retarder
Implementation Method 2
quick air bleed valve, which is configured to connect the working-pressure line to the air bleed line in order to bleed the working-pressure line
Data Source
AI summary
A pneumatic controlling device for a hydrodynamic brake comprises a working-pressure port, and further comprises at least one inlet valve via which a working-pressure line leading to the working-pressure port can be connected to an air feed line that is connected to a compressed-air source, and comprises at least one outlet valve via which the working-pressure line is connected to an air bleed line that is connected to an air bleed exit, wherein the working-pressure line is connected to the air bleed line via at least one quick air bleed valve, wherein a safety valve is arranged between the compressed-air source and the quick air bleed valve and is configured to actuate the quick air bleed valve.