Hydraulic Actuator Leak Detection Using Differential Flow Measurement
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Solution Overview
Problem
Industrial automated plants using pressurized fluids face significant economic and environmental issues due to routine hydraulic fluid leakage, requiring frequent manual refilling and resulting in plant downtime, high operating costs, and environmental impact.
Innovation Solution
A method for remote detection and quantification of hydraulic oil leakage in fluid dynamic circuits, allowing for automatic replenishment, precise localization of leaks, and timely maintenance, using a calibration circuit with differential flow measurements and a distribution valve system to test multiple actuators efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual refilling of hydraulic oil is performed to compensate for leakage, then operation continuity is maintained, but operating costs and environmental impact increase significantly
Solution Approach 1:
The system enables automatic detection and replenishment of hydraulic oil leakage through electronic control units that monitor fluid levels and activate pumps or valves to refill the system, eliminating the need for manual intervention and reducing both labor costs and environmental impact while maintaining continuous operation
2Reliability
If hydraulic oil supply system is oversized to compensate for leakages, then operation continuity is ensured, but system efficiency and cost-effectiveness deteriorate
Solution Approach 1:
The system incorporates sensors and electronic control units that continuously monitor hydraulic oil levels and leakage rates, providing real-time feedback that allows the pump system to operate only when and where needed, thereby maintaining operation continuity while significantly reducing energy consumption compared to continuously running oversized pumps
3Quantity of substance
If manual refilling interventions are carried out to compensate for detected leaks, then hydraulic oil loss is compensated, but productivity and operational efficiency decrease
Solution Approach 1:
The automatic detection and replenishment system continuously monitors hydraulic oil levels and autonomously refills the system through electronically controlled pumps and valves, eliminating all manual intervention and thereby maintaining full productivity while ensuring proper hydraulic oil levels are maintained
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
Significantly reduces operating costs and environmental pollution by enabling remote, accurate, and automatic detection and replenishment of hydraulic oil leaks, minimizing downtime and manual intervention.
Implementation Method 1
generating a pressure in the supply branch by passing through a restriction
Implementation Method 2
performing a first measurement of the flow rate in the pressure branch
Implementation Method 3
connecting the pressure branch to a port of the hydraulic actuator arranged in a blocking position
Implementation Method 4
performing a second measurement of the flow rate generated by the pump while the pressure branch is fluidically connected to said port; determining whether there is a leakage based on the comparison between the first and second flow measurement
Data Source
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AI summary
A leak detection method for at least one hydraulic actuator (D) comprises the steps of: - performing on a calibration circuit comprising a pump (P) and a pressure branch (RM) connected to the pressure side of the pump (P) an initial measurement of the flow rate in the pressure branch (RM), the flow rate generating a pressure in the pressure branch (RM) by passing through a restriction; - connecting fluidically the pressure branch (RM) to a port of the hydraulic actuator (D) arranged in a blocking position while the pressure branch (RM) is crossed by the flow; take a second measurement of the flow rate generated by the pump (P) while the pressure branch (RM) is fluidically connected to said port; - determining whether there is a leakage on the basis of the comparison of the first and second flow measurement.