Planetary Gearbox Oil Shielding for Stable Gear Lubrication
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Solution Overview
Problem
The existing planetary gearbox in gas turbine engines experiences reduced cooling and lubrication efficiency due to ejected oil compromising the oil jets, leading to a shorter service life.
Innovation Solution
Incorporating an oil supply installation with a shielding region and oil collection groove that directs and collects ejected oil, ensuring only temperature-controlled and filtered oil reaches the gears, maintaining consistent lubrication and cooling quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If oil is supplied to gears for cooling and lubrication, then the service life of the planetary gearbox is extended, but the ejected oil compromises the oil jets and reduces cooling and lubrication efficiency
Solution Approach 1:
The patent converts the harmful ejected oil into a beneficial resource by collecting it in grooves and channels, then redirecting it back to the gear meshing zones. This transforms the harmful factor (ejected oil compromising oil jets) into a benefit (additional lubrication and cooling), thereby maintaining high cooling and lubrication efficiency while extending service life.
Solution Approach 2:
The patent introduces intermediary structures (collection grooves, channels, and redistribution mechanisms) between the gear meshing zones and the external environment. These intermediaries capture the ejected oil and mediate its return to the lubrication zones, preventing direct compromise of the oil jets while maintaining continuous cooling and lubrication.
2Duration of action of stationary object
If oil is continuously supplied to gears, then cooling and lubrication is maintained, but oil jets are compromised by ejected oil
Solution Approach 1:
The patent ensures continuous cooling and lubrication by creating a closed-loop oil circulation system. Oil that would otherwise be lost is continuously collected and redistributed back to the gear zones, maintaining uninterrupted useful action without compromising oil jet quality through the intermediary collection and redistribution mechanisms.
Solution Approach 2:
The patent implements a feedback mechanism where ejected oil is collected and redirected back to the source. This feedback loop ensures that the oil supply system compensates for oil loss and maintains consistent oil jet quality, preventing degradation over time while sustaining continuous cooling and lubrication.
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 oil jet compromise, ensuring consistent and efficient cooling and lubrication of the planetary gearbox components, thereby extending its service life.
Implementation Method 1
the shielding region and by the oil supply installation delimit an oil collection groove in which the oil which is ejected from the planetary gear and from the gear is capable of being collected
Implementation Method 2
only oil that is temperature-controlled in a corresponding manner and potentially filtered by the oil supply installation is applied to the target gear
Implementation Method 3
Oil for cooling and/or lubricating is capable of being directed out of the opening in the direction of the planetary gear and/or the gear
Data Source
AI summary
A planetary gearbox includes a planet carrier, with a planetary gear rotatably disposed on the planet carrier, and a gear that meshes with the planetary gear, as well as a gas turbine engine having such a planetary gearbox. The planet carrier has an oil supply installation including a supply line for oil to an opening. The oil is directed out of the opening in the direction of the planetary gear and/or the gear. The oil supply installation in relation to a primary rotating direction of the planetary gear and/or the gear in front of the opening includes a shielding region which protrudes from an external side of the oil supply installation and which by way of the external side of the oil supply installation on a side that faces the primary rotating direction of the planetary gear and/or the gear, delimits an oil collection groove.