Closed Antioxidant Fluid System for Hydraulic Reservoirs
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Solution Overview
Problem
Hydraulic systems suffer from contamination due to ambient air, leading to oil oxidation, sludge formation, and frequent maintenance needs, as they operate in "open" systems where air and contaminants enter and exit the oil reservoir, causing wear and tear on equipment.
Innovation Solution
A compact auxiliary reservoir system that attaches to the oil reservoir, incorporating an oxygen absorber, desiccant, and heat pipe to create a nitrogen-rich, dry environment, preventing oxygen ingress and moisture retention, thereby maintaining the oil in a clean and inert state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If an open hydraulic system with air breather cap is used, then the system operates at near ambient air pressure with simple design, but ambient air enters and leaves the reservoir causing oil oxidation, contamination, and frequent maintenance
Solution Approach 1:
The patent introduces a closed system that replaces ambient air with an inert nitrogen atmosphere in the reservoir headspace. Nitrogen gas is supplied through a regulator and distributor to displace oxygen-containing air, creating an inert environment that prevents oil oxidation and contamination while maintaining pressure balance during system operation.
Solution Approach 2:
The patent uses nitrogen gas as an intermediary substance between the oil and the external environment. Instead of allowing direct contact between oil and ambient air (which causes oxidation), nitrogen acts as a protective medium that maintains pressure equilibrium while preventing harmful chemical reactions and contamination.
2Reliability
If frequent oil and filter changes are performed, then wear and contamination are minimized in open systems, but maintenance costs and downtime increase
Solution Approach 1:
By maintaining a nitrogen-filled inert atmosphere in the reservoir, the patent prevents oil oxidation and contamination at the source. This eliminates the need for frequent oil and filter changes, reducing maintenance frequency and downtime while preserving oil quality and equipment reliability over extended periods.
Solution Approach 2:
The system performs preliminary protection by establishing an inert nitrogen atmosphere before contamination can occur. This preventive approach stops oxidation and contamination before they start, rather than requiring corrective maintenance after degradation has occurred.
3Object-affected harmful factors
If breather caps with filters and air driers are used, then ingression contamination is reduced, but the desiccant becomes saturated quickly requiring costly service
Solution Approach 1:
Instead of using filters and driers that require periodic servicing, the patent replaces the air atmosphere with nitrogen gas. This eliminates the need for desiccant materials that become saturated, as nitrogen is inert and does not contain moisture or contaminants that would require filtering or drying.
Solution Approach 2:
The patent replaces expensive, short-lived consumable components (desiccant, filters) with a reusable nitrogen gas supply system. Nitrogen can be continuously replenished from external sources, eliminating the need for frequent replacement of saturated desiccant and clogged filters.
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 significantly extends the life of hydraulic fluid and equipment by preventing oxidation and contamination, reducing the need for frequent oil and filter changes, and ensuring long-term trouble-free operation without oil or filter replacements.
Implementation Method 1
an oxygen absorber in fluid communication with the air space within the reservoir whereby the absorption of oxygen by the oxygen absorber promotes a nitrogen rich air concentration within the reservoir
Implementation Method 2
a desiccant in fluid communication with the air space within the reservoir
Implementation Method 3
a heat pipe in fluid communication with the air space within the reservoir
Implementation Method 4
the absorption of oxygen by the oxygen absorber promotes a nitrogen rich air concentration within the reservoir thereby preventing oxidation of the oil
Data Source
AI summary
A closed lubrication or hydraulic system that eliminates the traditional breather cap and includes (1) oxygen absorber that removes oxygen molecules and (2) a desiccant to dry the air that communicates with hydraulic fluid or lubricant in a reservoir. A metallic heat conduction rod is partially exposed to internal air and partly exposed to ambient air. The conduction rod is in close proximity to the oxygen absorber and desiccant in the cartridge. A cool portion on the conduction rod attracts hot humid internal air causing condensation of water near the surface of the conduction rod.