Sensor-Guided Hydraulic Flow Limiting for Stable Steering Speed
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Solution Overview
Problem
Hydraulic systems, such as those used in steering and lifting devices, face challenges in ensuring safety by adapting operational speed to varying working conditions, particularly in environments where rapid changes in load or terrain can lead to dangerous situations due to unpredictable steering or lifting speeds.
Innovation Solution
Incorporating flow limiting means operatively coupled with sensor arrangements in the valve arrangement to control the flow to the working port, allowing for adaptive speed adjustments based on working conditions, such as vehicle speed or load, using flow limiting valves and steering valves in parallel to manage hydraulic fluid flow safely.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the flow of hydraulic fluid is increased to improve operational speed, then productivity increases, but safety deteriorates due to unpredictable steering or lifting speeds under varying working conditions
Solution Approach 1:
The flow limiting means are configured to dynamically adjust the maximum flow of hydraulic fluid based on detected working conditions such as vehicle speed, load, or terrain. This dynamic adaptation allows the system to optimize operational speed for productivity while simultaneously maintaining safety by preventing excessively high speeds under inappropriate conditions
Solution Approach 2:
The system incorporates sensor arrangements that detect working conditions and provide feedback to the flow limiting means. This feedback loop enables real-time adjustment of hydraulic fluid flow, allowing the system to respond to changing conditions and maintain both high productivity and safety through continuous monitoring and adaptation
2Reliability
If flow limiting means are added to control hydraulic fluid flow based on working conditions, then safety improves, but device complexity increases
Solution Approach 1:
The flow limiting means are designed to perform multiple functions: limiting maximum flow for safety, adapting flow based on various working conditions, and potentially serving as part of the overall control system architecture. This multi-functionality reduces the need for separate dedicated safety devices, thereby managing complexity while achieving safety goals
Solution Approach 2:
The flow limiting means act as an intermediary component between the hydraulic power source and the working ports. By positioning this flow control element in the fluid path, the system achieves safety control through a single strategic component rather than multiple distributed control elements, simplifying the overall system architecture
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 solution ensures safer operation by dynamically adjusting hydraulic motor speed according to conditions, reducing the risk of malfunctions and allowing for stable steering and lifting operations across different scenarios, thereby enhancing safety integrity and reducing hardware and software demands.
Implementation Method 1
the flow limiting means limit the flow to the working port arrangement depending on the at least one working condition of the hydraulic arrangement
Data Source
AI summary
A hydraulic arrangement including a supply port (5), a working port arrangement (20), a valve arrangement (3, 8, 21) controlling a supply of hydraulic fluid from the supply port (5) to the working port arrangement (20), a command device (20) controlling the valve arrangement (3, 8, 21), and a sensor arrangement (19) sensing at least a working condition of the hydraulic arrangement is described. In such a hydraulic arrangement a simple way should be given to achieve a safety functionality. To this end the valve arrangement (3, 8, 21) includes flow limiting means (9) operatively coupled to the sensor arrangement (19), wherein the flow limiting means (9) limit the flow to the working port arrangement (20) depending on the at least one working condition of the hydraulic arrangement.