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Oil sump seal pressurization apparatus for turbine engines are disclosed. An example oil sump seal pressurization apparatus may include a non-rotating oil sump housing a bearing; an oil seal isolating an interior of the oil sump; a passage arranged to supply pressurization air to an outward side of

Oil sump seal pressurization apparatus for turbine engines are disclosed. An example oil sump seal pressurization apparatus may include a non-rotating oil sump housing a bearing; an oil seal isolating an interior of the oil sump; a passage arranged to supply pressurization air to an outward side of the oil seal; a drain arranged to allow draining of oil and venting of at least some of the pressurization air, the drain being positioned axially between the passage and the oil seal; a wide discourager tooth disposed on the shaft and extending radially outward towards a non-rotating land, which may be disposed axially between the passage and the drain, the wide discourager tooth being spaced apart from the land in a radial direction by a gap, the wide discourager tooth including an upper surface; and/or an adjacent tooth disposed on the shaft and extending radially outward from the shaft.

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1. An oil sump seal pressurization apparatus for a turbine engine, the oil sump seal pressurization apparatus comprising: a non-rotating oil sump housing a bearing, the bearing supporting a rotatable shaft;an oil seal at least partially isolating an interior of the oil sump, the oil seal operatively

1. An oil sump seal pressurization apparatus for a turbine engine, the oil sump seal pressurization apparatus comprising: a non-rotating oil sump housing a bearing, the bearing supporting a rotatable shaft;an oil seal at least partially isolating an interior of the oil sump, the oil seal operatively acting between a non-rotating structural member of the sump and the rotatable shaft;a passage arranged to supply pressurization air to an outward side of the oil seal with respect to the oil sump;a drain arranged to allow draining of oil and venting of at least some of the pressurization air, the drain being positioned axially between the passage and the oil seal;a discourager tooth disposed on the shaft and extending radially outward towards a non-rotating land, the land being disposed axially between the passage and the drain, the discourager tooth being spaced apart from the land in a generally radial direction by a design gap having a width, the discourager tooth including an upper surface having a width; anda first adjacent tooth disposed on the shaft and extending radially outward from the shaft, the first adjacent tooth having a width;wherein the discourager tooth width is at least about 1.5 times the width of the first adjacent tooth. 2. The oil sump seal pressurization apparatus of claim 1, wherein the discourager tooth width is at least about 2.0 times the width of the first adjacent tooth. 3. The oil sump seal pressurization apparatus of claim 1, wherein the discourager tooth width is at least about 2.5 times the width of the first adjacent tooth. 4. The oil sump seal pressurization apparatus of claim 1, further comprising a second adjacent tooth disposed on an axially opposite side of the discourager tooth;wherein the discourager tooth width is at least about 1.5 times the width of the first adjacent tooth and the discourager tooth width is at least about 1.5 times a width of the second adjacent tooth. 5. The oil sump seal pressurization apparatus of claim 1, further comprising a second adjacent tooth disposed on an axially opposite side of the discourager tooth;wherein the discourager tooth width is at least about 2.0 times the width of the first adjacent tooth and the discourager tooth width is at least about 2.0 times a width of the second adjacent tooth. 6. The oil sump seal pressurization apparatus of claim 1, further comprising a second adjacent tooth disposed on an axially opposite side of the discourager tooth;wherein the discourager tooth width is at least about 2.5 times the width of the first adjacent tooth and the discourager tooth width is at least about 2.5 times a width of the second adjacent tooth. 7. The oil sump seal pressurization apparatus of claim 1, wherein a ratio of discourager tooth width to design gap width is greater than about 0.5. 8. The oil sump seal pressurization apparatus of claim 1, wherein the ratio of discourager tooth width to design gap width is greater than about 1.0. 9. The oil sump seal pressurization apparatus of claim 1, wherein the ratio of discourager tooth width to design gap width is greater than about 4.0. 10. An oil sump seal pressurization apparatus for a turbine engine, the oil sump seal pressurization apparatus comprising: a non-rotating oil sump housing a bearing, the bearing supporting a rotatable shaft;an oil seal at least partially isolating an interior of the oil sump, the oil seal operatively acting between a non-rotating structural member of the sump and the rotatable shaft;a passage arranged to supply pressurization air to an outward side of the oil seal with respect to the oil sump;a drain arranged to allow draining of oil and venting of at least some of the pressurization air, the drain being positioned axially between the passage and the oil seal; anda discourager tooth disposed on the shaft and extending radially outward towards a non-rotating land, the land being disposed axially between the passage and the drain, the discourager tooth being spaced apart from the land in a generally radial direction by a design gap having a width, the discourager tooth including an upper surface having a width;wherein a ratio of discourager tooth width to design gap width is greater than about 0.5. 11. The oil sump seal pressurization apparatus of claim 10, wherein the ratio of discourager tooth width to design gap width is greater than about 1.0. 12. The oil sump seal pressurization apparatus of claim 10, wherein the ratio of discourager tooth width to design gap width is greater than about 4.0. 13. The oil sump seal pressurization apparatus of claim 10, further comprising a first adjacent tooth disposed on the shaft and extending radially outward from the shaft;wherein the discourager tooth width is at least about 1.5 times a width of the first adjacent tooth. 14. The oil sump seal pressurization apparatus of claim 13, further comprising a second adjacent tooth disposed on an axially opposite side of the discourager tooth;wherein the discourager tooth width is at least about 1.5 times the width of the first adjacent tooth and the discourager tooth width is at least about 1.5 times a width of the second adjacent tooth. 15. The oil sump seal pressurization apparatus of claim 10, further comprising a first adjacent tooth disposed on the shaft and extending radially outward from the shaft;wherein the discourager tooth width is at least about 2.0 times the width of the first adjacent tooth. 16. The oil sump seal pressurization apparatus of claim 15, further comprising a second adjacent tooth disposed on an axially opposite side of the discourager tooth;wherein the discourager tooth width is at least about 2.0 times the width of the first adjacent tooth and the discourager tooth width is at least about 2.0 times a width of the second adjacent tooth. 17. The oil sump seal pressurization apparatus of claim 10, further comprising a first adjacent tooth disposed on the shaft and extending radially outward from the shaft;wherein the discourager tooth width is at least about 2.5 times the width of the first adjacent tooth. 18. The oil sump seal pressurization apparatus of claim 17, further comprising a second adjacent tooth disposed on an axially opposite side of the discourager tooth;wherein the discourager tooth width is at least about 2.5 times the width of the first adjacent tooth and the discourager tooth width is at least about 2.5 times a width of the second adjacent tooth.