SYSTÈME DE LUBRIFICATION DE MOTEUR À TURBINE À GAZ, MOTEUR À TURBINE À GAZ COMPORTANT UN SYSTÈME DE POMPE DE SURALIMENTATION ET PROCÉDÉ CORRESPONDANT

摘要

A lubrication system (88) for a gas turbine engine is provided. The lubrication system (88) includes a supply source (90) of a fluid lubricant, a main supply pump (92), and a boost pump system (96,396). The main supply pump (92) has an MSP fluid flow inlet port (93) and an MSP fluid flow exit port (95). The main supply pump (92) is configured to receive a source fluid lubricant flow at a first pressure, and configured to produce a supply fluid flow at a second pressure. The second pressure is greater than the first pressure. The boost pump system (96,396) has a boost pump (398) having a BP fluid flow inlet port (397), and a BP fluid flow exit port (399). The boost pump system (96,396) is configured so that the boost pump (398) selectively receives at least a portion of the supply fluid flow from the main supply pump (92) at the BP fluid flow inlet port (397), and the boost pump (398) is configured to produce a boost supply fluid flow at a third pressure at the BP fluid flow exit port (399), wherein the third pressure is greater than the second pressure.