Hydraulic Charging Control for Cyclic Load Balancing
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Solution Overview
Problem
Hydraulic systems, particularly those in marine applications, face challenges in maintaining constant pressure with heavy cyclic loading, leading to power fluctuations and increased wear on motors and pumps, which traditional systems fail to adequately address.
Innovation Solution
A hydraulic charging system utilizing a closed loop logic controller with multiple control algorithms, including pressure and power limiting loops, to monitor and adjust the load on variable displacement hydraulic pumps, balancing the load between multiple pumps and motors, and using a pressure reducing valve to maintain constant system pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional hydraulic systems are used with heavy cyclic loading, then system pressure can be maintained, but power fluctuations occur and cause increased wear on motors and pumps
Solution Approach 1:
The system employs electronic feedback control through load sensors that continuously monitor motor load and provide real-time signals to the control unit. This feedback mechanism enables dynamic adjustment of pump displacement to maintain constant load conditions, eliminating power fluctuations and reducing wear on hydraulic components while preserving system pressure maintenance capability
Solution Approach 2:
The invention implements dynamic load balancing by continuously varying the displacement of pressure compensated variable displacement pumps based on real-time load conditions. The electronic control system dynamically adjusts pump operation to maintain constant motor load, transforming the static hydraulic system into a dynamically adaptive system that responds to changing operational demands without causing power fluctuations
2Stability of the object's composition
If large amounts of hydraulic fluid accumulation are used to maintain constant pressure, then system pressure stability is improved, but system volume and complexity increase
Solution Approach 1:
The system replaces traditional mechanical pressure stabilization methods (large hydraulic accumulators) with an electronic control system that uses feedback from load sensors to dynamically adjust pump displacement. This substitution eliminates the need for large volumes of hydraulic fluid accumulation while maintaining constant pressure through electronic regulation of pump operation
Solution Approach 2:
The invention changes the operational parameters of pressure compensated variable displacement pumps by continuously adjusting their displacement based on electronic feedback signals. This parameter adjustment enables the system to maintain constant pressure stability without requiring large accumulators, as the pumps dynamically adapt their flow output to match system demands
3Productivity
If multiple pumps are used on single hydraulic systems, then system capacity is increased, but load distribution becomes uneven causing unequal wear
Solution Approach 1:
The system uses feedback control through load sensors on each motor to monitor individual load conditions. The control unit receives feedback signals from all pumps and automatically distributes load evenly among multiple pumps by adjusting their displacement, ensuring uniform wear and extending system reliability while maintaining increased system capacity
4Loss of energy
If pressure compensated variable displacement pumps are used, then system efficiency is improved, but power fluctuations occur under heavy cyclic loading
Solution Approach 1:
The invention introduces electronic feedback control through load sensors that monitor motor load in real-time. This feedback enables the system to maintain the efficiency benefits of pressure compensated variable displacement pumps while eliminating power fluctuations by dynamically adjusting pump displacement to keep motor load constant, even under heavy cyclic loading conditions
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 system significantly reduces power fluctuations, allows for the use of common pressure compensated pumps, reduces hydraulic fluid accumulation volume, and equalizes wear across pumps and motors, enhancing system performance and reliability.
Implementation Method 1
at least one hydraulic fluid accumulator
Implementation Method 2
pressure reducing valve to maintain constant system pressure
Data Source
AI summary
A marine hydraulic system and method of use for reducing cyclic loading of the pump(s) and motor(s) and an amount of accumulator storage required in a hydraulic system. A closed loop logic controller comprising at least one control algorithm for each pump/motor pair utilized in a single hydraulic system is utilized to reduce load fluctuations on the motors, allow the use of common pressure compensated, variable displacement (VDH) pumps, reduce the number and/or volume of system accumulators and equalize wear throughout the system.