Smart Microlubrication Valve for Adaptive Air-Oil Ratio Control
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Solution Overview
Problem
Existing minimum quantity lubrication devices for machining processes require high equipment expenditure for controlling and monitoring the lubricant-to-air ratio, with complex calibration needed to compensate for viscosity changes in different lubricants.
Innovation Solution
Integration of smart components with embedded sensors and microprocessors that evaluate and adjust lubricant and air ratios independently, eliminating the need for external sensors and reducing calibration efforts, allowing for adaptive lubricant dosage based on processing parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional lubrication control systems are used with external sensors and separate control units, then the lubricant-to-air ratio can be monitored, but the equipment expenditure and system complexity increase significantly
Solution Approach 1:
The patent combines the sensor, control unit, and metering valve into a single integrated smart component. The sensor detects lubricant parameters directly at the valve, the microprocessor evaluates this data locally, and the valve actuator adjusts metering based on this evaluation - all within one compact unit mounted on the lubricant line, eliminating the need for separate external control systems
Solution Approach 2:
The smart metering valve performs self-diagnosis and self-adjustment by using its own sensor to detect lubricant pressure and flow, its microprocessor to evaluate the lubricant-to-air ratio, and its integrated actuator to automatically correct deviations without external intervention or calibration
2Ease of operation
If external sensors and separate control units are used for lubricant monitoring, then the lubricant delivery can be controlled, but the installation and maintenance complexity increases
Solution Approach 1:
By integrating all control functions into a single smart component that mounts directly on the lubricant line, the patent eliminates multiple separate installations (external sensors, separate control units, wiring harnesses) and simplifies maintenance to a single replaceable unit with built-in diagnostics
3Manufacturing precision
If calibration is performed to compensate for viscosity changes in different lubricants, then the metering accuracy can be maintained, but the calibration time and effort increase
Solution Approach 1:
The smart metering valve automatically adapts to different lubricants by using its sensor to detect actual lubricant pressure and flow characteristics, its microprocessor to evaluate the lubricant-to-air ratio, and its actuator to adjust the metering in real-time without requiring manual calibration or viscosity compensation tables
Solution Approach 2:
The system transitions from static calibration tables to dynamic real-time adjustment, where the metering valve continuously adapts its operation based on actual lubricant conditions detected by the sensor and evaluated by the microprocessor, allowing accurate metering across varying viscosity conditions without pre-calibration
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
Simplifies the control and monitoring of lubrication systems, reducing maintenance and installation complexity while maintaining consistent lubricant delivery across varying conditions without external calibration.
Implementation Method 1
The sensor and control unit has a circuit, in particular a shunt or a Hall sensor, with which the course of the current can be detected via a magnetic coil of the metering valve when the metering valve opens
Data Source
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AI summary
The invention relates to a microlubrication system (10) for a machining unit with a rotating spindle (18), said system comprising a rotary feedthrough (32) via which compressed air and lubricant can be fed to the rotating spindle (18) to combine them in a mixing chamber (58) close to a tool (24), and a metering valve (46) by means of which the amount of the fed lubricant can be dosed. In order to improve the monitoring and the control of the system, the rotary feedthrough (32) and/or the metering valve (46) are designed as smart components.