Vacuum system for membrane fuel stabilization unit

摘要

Oil system components for a turbine engine (12) are used to provide a vacuum system for a fuel stabilization unit (FSU) (16). A vacuum system pulls oxygen and other contaminants from fuel into a vacuum chamber (26) within the FSU (16). The vacuum system pumps the discharge through a vacuum outlet (30) in the FSU (16) toward a vacuum pump (32). Due to the quality of vacuum required, a two-stage vacuum pump (32) is used. A first stage vacuum pump is an oil system scavenge pump (36) for the turbine engine (12) and the second stage vacuum is provided by a second stage vacuum pump (38). The discharge flows from the vacuum chamber (26) through to the second stage vacuum pump (38) and is then added to the oil supply. The oil and discharge mixture is sent through an oil system de-oiler (42) and a de-aerator (44) to clean the oil supply prior to pumping the oil back through the oil system.