Lubricating Oil Return Line Overpressure Against Moisture Ingress
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Solution Overview
Problem
Existing lubrication systems in machines, such as paper machines, face issues with water absorption leading to corrosion due to inaccurate determination of water content in lubricating oil, requiring frequent recalibration and costly replacement, and are prone to contamination from moist air and foreign substances.
Innovation Solution
A system that introduces a protective medium, such as air, into the lubricating oil return line to create an overpressure or volume flow, preventing contaminants like moist air and foreign substances from entering the lubricating oil at lubrication points, using a heat exchanger for cooling and a siphon to regulate pressure, and including a check valve to maintain pressure within the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If water content monitoring and calibration are implemented, then corrosion prevention is improved, but measurement precision deteriorates due to inaccurate reference curves
Solution Approach 1:
The patent introduces a protective medium (inert gas) as an intermediary between the lubricating oil and the environment. This mediator prevents water and contaminants from entering the oil system, eliminating the need for accurate water content measurement and calibration while reliably preventing corrosion.
2Reliability
If complex cleaning devices or drying systems are installed, then water removal is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary anti-action by introducing a protective medium before water contamination can occur. The inert gas creates a barrier that prevents water from entering the lubricating oil, eliminating the need for complex cleaning devices or drying systems that would otherwise be required to remove water.
3Reliability
If lubricating oil is frequently replaced, then corrosion prevention is improved, but loss of substance increases
Solution Approach 1:
The protective medium acts as a barrier that prevents water and contaminants from contaminating the lubricating oil. This eliminates the need for frequent oil replacement while maintaining corrosion prevention, thereby reducing substance loss.
4Reliability
If protective medium is introduced into return line, then contamination prevention is improved, but device complexity increases
Solution Approach 1:
The patent extracts the problem of contamination prevention from the lubricating oil system itself and implements it separately through a protective medium introduced into the return line. This creates an independent barrier system that prevents contaminants from entering the oil without requiring complex modifications to the oil circulation system.
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 effectively prevents water-induced corrosion and contamination in lubrication points by maintaining an overpressure in the lubricating oil return line, enhancing operational reliability at a lower cost by reducing the need for frequent recalibration and replacement of lubricating oil.
Implementation Method 1
a protective medium, which is air, can be introduced into the lubricating oil return line (3.2) in order to pressurize the lubricating oil return line (3.2) up to the lubrication point (2) with an operating pressure or an overpressure
Implementation Method 2
a heat exchanger (6) which is operated with cooling water for the purpose of cooling the circulating lubricating oil
Implementation Method 3
viewed in flow direction, it can be advantageous if the lubricating oil return line includes a siphon before the lubricating oil returns into the lubricating oil reservoir
Implementation Method 4
including a check valve to maintain pressure within the system
Data Source
AI summary
A system for supplying at least one lubrication point of a machine with lubricating oil includes: a lubricating oil reservoir; a delivery pump; a heat exchanger; a lubrication point; a plurality of lines including a lubricating oil supply line and a lubricating oil return line, the lubrication point being hydraulically connected to the lubricating oil reservoir via the lubricating oil supply line and the lubricating oil return line, a lubricating oil circuit being configured such that the lubricating oil flows through the lubricating oil circuit in one flow direction, the lubricating oil return line including an inlet point which is configured for a protective medium, which is air, being introduced into the lubricating oil return line.