Backup Lubrication Tank Layout for Gravity-Fed Residual Lubrication
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Solution Overview
Problem
Existing lubrication systems for mechanical systems, such as power transmission boxes in rotary-wing aircraft, face limitations in providing comprehensive lubrication during leaks or failures, often resulting in partial and temporary lubrication of essential components, leading to potential system degradation or shutdown.
Innovation Solution
A lubrication system comprising a main tank and an emergency tank, where the emergency tank is positioned above the main suction point, allowing lubricating liquid to flow by gravity into the main suction line, ensuring continuous supply to the main lubrication circuit and enabling residual lubrication of all system components during failures or leaks.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If a backup reservoir is used to provide emergency lubrication, then the duration of lubrication action is extended during failures, but the device complexity increases due to additional tanks and lines
Solution Approach 1:
The patent merges the backup reservoir with the existing main lubrication circuit by connecting it to the suction line. The backup reservoir is integrated into the circuit such that it automatically supplies lubricating fluid through gravity when the main reservoir level drops, eliminating the need for separate emergency spraying devices and dedicated lines, thus extending lubrication duration without proportionally increasing system complexity
Solution Approach 2:
The backup reservoir is designed to automatically activate when needed. It uses gravity feed to supply lubricating fluid to the main suction line when the main reservoir is depleted, without requiring external control systems, sensors, or additional power sources. This self-activating mechanism extends lubrication duration while minimizing added complexity
2Ease of operation
If the emergency tank is positioned above the main suction point to use gravity flow, then the ease of operation is improved by eliminating pumps, but the volume of the emergency tank is constrained by available space
Solution Approach 1:
The backup reservoir is positioned at a higher elevation than the main suction point, creating a gravitational potential difference that drives fluid flow. This elevation-based design uses gravity as the driving force, eliminating the need for additional pumps or pressurization systems, thereby improving ease of operation while the tank volume is optimized to fit within available space constraints
3Reliability
If the backup reservoir continuously supplies the main circuit, then the reliability is improved by maintaining fluid flow, but the loss of substance increases due to continuous circulation
Solution Approach 1:
The system dynamically adjusts its operation mode based on the main reservoir fluid level. When the main reservoir has sufficient fluid, the backup reservoir remains idle or supplies minimally. When the main reservoir level drops below the suction point, the backup reservoir automatically becomes the active supply source. This dynamic switching maintains reliable lubrication supply while minimizing unnecessary fluid circulation and associated losses
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 configuration ensures effective residual lubrication of all mechanical system components for a limited period, allowing the system to operate until the aircraft can land safely, without requiring specific emergency spraying devices or additional dedicated lines, and maintains the emergency tank full except during failures.
Implementation Method 1
the backup reservoir is located at least partially on a first plane, higher than a second plane on which the main suction point is located, in the direction of Earth's gravity. An outlet line connects the backup reservoir to the main suction line of the main lubrication circuit so that the lubricating liquid flows by gravity in the outlet line from the backup reservoir to the main suction line.
Data Source
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AI summary
The present invention relates to a lubrication system (1) for a mechanical system (3), said lubrication system (1) comprising a main reservoir (2), a backup reservoir (30), and a main lubrication circuit (10). Said main lubrication circuit (10) includes, in particular, a pump (11) drawing said lubricating fluid from said main reservoir (2) via a main suction point (16) and a main suction line (15) connecting said main suction point (16) to said pump (11). Said backup reservoir (30) is supplied with lubricating fluid either directly from said main reservoir (2) or via said main lubrication circuit (10).The said backup reservoir (30) is connected to the said main suction line (15) by means of an outlet line (32) and the said backup reservoir (30) is located above the said main suction point (16) so that the said lubricating fluid flows by gravity into the said outlet line (32) to the said main suction line (15).