Inverted Lifeboat Diesel Engine Lubrication System
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing inverted non-stop lifeboat diesel engine lubrication systems fail to enable longitudinal turnover and suffer from engine oil leakage and uncontrolled lubricating oil flow, leading to inefficiencies and environmental pollution during free-fall operations from a mother ship.
Innovation Solution
A lubrication system with a double pump configuration, including a lubricating pump and an oil return pump, a lubricating oil tank with a breathing one-way valve, and an overflow valve, which separates engine oil collection and storage functions, ensuring efficient lubrication and minimizing leakage by recycling engine oil and controlling flow.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the diesel engine is turned over and inverted during free-fall operations, then the lifeboat can achieve longitudinal turnover and non-stop operation, but engine oil leakage occurs and lubrication system reliability deteriorates
Solution Approach 1:
The lubrication system is segmented into separate functional components: a crankcase for engine operation, an oil pan for oil storage and collection, and a dedicated lubrication system with pumps and channels. This segmentation allows independent optimization of each component for inverted operation, preventing oil leakage while maintaining reliability during longitudinal turnover
Solution Approach 2:
The lubrication system is specifically designed and inverted to operate in the inverted position. The oil pan, crankcase, and lubrication components are configured to function correctly when the engine is inverted, with oil flow channels and pumps oriented to maintain proper lubrication during free-fall operations rather than adapting an upright system
2Device complexity
If a single oil pan structure is used for both oil collection and storage, then device complexity is reduced, but oil flow control precision and lubrication efficiency deteriorate
Solution Approach 1:
The oil pan is segmented into distinct functional zones: an oil collection area that receives oil from the crankcase and a separate oil storage area that supplies oil to the lubrication system. This segmentation within the oil pan enables precise control of oil flow between collection and storage functions, improving lubrication efficiency without requiring completely separate components
3Quantity of substance
If the overflow valve allows uncontrolled oil flow, then oil storage capacity is increased, but oil waste and environmental pollution increase
Solution Approach 1:
The overflow valve incorporates a feedback control mechanism that monitors oil level and flow conditions in the oil pan. When oil reaches a certain level or flow rate threshold, the valve automatically regulates or closes to prevent excessive oil discharge, maintaining optimal oil storage capacity while preventing waste and pollution during free-fall operations
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
The system allows for efficient lubrication during longitudinal and transverse turnover, reduces oil leakage and waste, and enhances environmental sustainability by recycling engine oil and optimizing oil storage, thus meeting the requirements for free-fall operations.
Implementation Method 1
a breathing one-way valve (132)... The breathing one-way valve is used for the upright working of a diesel engine... When the heel of the diesel engine is more than 90°, a valve port of the one-way valve is automatically closed
Implementation Method 2
The engine oil pump is a double pump having oil inlets and outlets independent separately, which is formed by superposing upper and lower layers. The upper layer is a lubricating pump and a lower layer is an oil return pump
Implementation Method 3
An inlet of the overflow valve is connected to a bypass between the oil outlet and the inlet of the machine filter... During the test, the engine should not undergo overheat, work failure, or leakage of oil of over 250 ml when being inverted at any time
Implementation Method 4
When the diesel engine is turned over and inverted, there is not only a problem that a diesel engine can only be turned over around an axis parallel to a crankshaft axis... but also a problem of engine oil leakage when the diesel engine is turned over and inverted
Data Source
AI summary
A lubrication system includes an engine oil pump, a lubricating oil tank, a breathing pipe, a machine body, and an oil pan. The engine oil pump is formed by superposing upper and lower layers being a lubricating pump and an oil return pump. An oil inlet of the oil return pump leads to a cavity of the oil pan, and an oil outlet leads to an interior of the lubricating oil tank. An oil inlet of the lubricating pump leads to the interior of the lubricating oil tank, and an oil outlet leads to a machine filter. The machine filter is communicated with a main oil path of the machine body. An oil tank cover of the lubricating oil tank is provided with a breathing one-way valve and an oil filling port. The breathing one-way valve communicates one end of the breathing pipe, and the other end thereof communicates a crankcase.