Mitigating spiral pumping effects upstream of oil seals

摘要

Oil sump seal pressurization apparatus for a turbine engine (10) are disclosed. An example oil sump seal pressurization apparatus may include an oil sump (32) comprising at least one bearing (80) mounted therein; an oil seal (68) operatively disposed between a non-rotating structural member (44) of the sump and the shaft (26); a generally radially inwardly oriented passage (62) arranged to supply pressurization air (90) to the outward side of the oil seal; a generally radially outwardly oriented pathway (58) arranged to receive at least some of the pressurization air from the passage, the pathway being at least partially defined by a generally radially outwardly extending arm (56) disposed on the shaft, the arm rotating with the shaft; and/or a windage shield (60) at least partially separating the passage and the pathway, the windage shield being operatively mounted to the non-rotating structural member of the sump.