Patent ID: 8672095
Filing Date: 2014-03-18
Classification: F01D,F02C,F05D,Y02T

Abstract:
1. A method of lubricating a turbomachine including distinct first, second, and third enclosures each including at least one rolling bearing, the method comprising: pressurizing the enclosures by injecting therein a flow of compressed air through sealing gaskets closing the enclosures, the first and second enclosures being main enclosures being pressurized at a pressure higher than the third enclosure being a secondary enclosure; lubricating the rolling bearing of each of the main enclosures by injecting therein a flow of oil taken from an oil tank of the turbomachine via an injection nozzle provided at each of the main enclosures; lubricating the rolling bearing of the secondary enclosure solely by injecting an oil mist directly coming from a first outlet of at least one of the main enclosures via an injection duct to an inlet of the secondary enclosure, the injection duct connecting the first outlet of the at least one of the main enclosures to the inlet of the secondary enclosure, the oil mist being conveyed by a pressure difference between the main and secondary enclosures; recovering a remainder of the lubricating oil injected into the main enclosures via a second outlet to convey the remainder of the lubricating oil to the oil tank via a discharge duct; and conveying the air/oil mixture coming from the secondary enclosure to a de-oiler via an outlet to separate the air and the oil.