Bearing housing assembly

1. A bearing housing cover for a gas turbine engine having an impeller, comprising:

an annular collar having a flange mountable to an exterior surface of a bearing housing;

an impeller baffle integrated with the annular collar, the impeller baffle having an annular body with a front baffle face positionable adjacent a rear face of the impeller, a rear baffle face having a plurality of stiffening elements extending between the rear baffle face and the annular collar, and a central baffle opening; and

a plurality of air passages extending through the bearing housing cover at least partially axially between the front baffle face and the flange, the plurality of air passages being circumferentially separated from one another, and wherein, upon mounting the flange to the exterior surface of the bearing housing, the plurality of air passages are in fluid communication with air passageways through the bearing housing.

2. The bearing housing cover as defined in claim 1 , wherein the front baffle face is shaped to follow the profile of the rear face of the impeller.

3. The bearing housing cover as defined in claim 1 , wherein the plurality of stiffening elements include one or more of ribs, webs or struts.

4. The bearing housing cover as defined in claim 1 , wherein the plurality of stiffening elements are hollow.

5. The bearing housing cover as defined in claim 1 , wherein the plurality of stiffening elements are evenly spaced about the circumference of the annular collar.

6. The bearing housing cover as defined in claim 1 , wherein the baffle includes a varying thickness between the front baffle face and the rear baffle face.

7. The bearing housing as defined in claim 6 , wherein the thickness of the baffle varies in a radial or circumferential direction.

8. The bearing housing as defined in claim 1 , wherein, upon mounting the flange to the exterior surface of the bearing housing, the plurality of air passages are in fluid communication with an interior chamber of the bearing housing.

9. The bearing housing as defined in claim 1 , wherein the flange includes a plurality of bolt holes for mounting to the exterior surface of the bearing housing.

10. A gas turbine engine comprising:

a centrifugal compressor having an impeller;

a bearing housing located downstream from the impeller, the bearing housing including a bearing within an interior chamber, the bearing rotationally supporting the impeller; and

a bearing housing cover at least partially enclosing the bearing housing, the bearing housing comprising:

an annular collar having a flange mountable to an exterior surface of the bearing housing;

an impeller baffle integrated with the annular collar, the impeller baffle having an annular body with a front baffle face positioned adjacent a rear face of the impeller, a rear baffle face having a plurality of stiffening elements extending between the rear baffle face and the annular collar, and a central baffle opening; and

a plurality of air passages circumferentially separated from one another and extending through the bearing housing cover at least partially axially between the front baffle face and the flange, the plurality of air passages in fluid communication with the interior chamber of the bearing housing.

11. The gas turbine engine as defined in claim 10 , wherein the bearing housing cover is mounted to an upstream end of the bearing housing.

12. The gas turbine engine as defined in claim 11 , further comprising a second bearing housing cover mounted to a downstream end of the bearing housing, the second bearing housing cover including a plurality of air passages in fluid communication with the plurality of air passages in the bearing housing cover mounted to the upstream end of the bearing housing.

13. The gas turbine engine as defined in claim 10 , wherein the central baffle opening in the bearing housing cover includes an inner ring having a lip extending radially inwardly adjacent an outer surface of the bearing housing to define an air gap leading to the interior chamber of the bearing housing.

14. The gas turbine engine as defined in claim 10 , wherein the front baffle face is shaped to follow the profile of the rear face of the impeller.

15. The gas turbine engine as defined in claim 10 , wherein the plurality of stiffening elements include one or more of ribs, webs or struts.

16. The gas turbine engine as defined in claim 10 , wherein the plurality of stiffening elements are hollow.

17. The gas turbine engine as defined in claim 10 , wherein the plurality of stiffening elements are evenly spaced out about the circumference of the annular collar.

18. The gas turbine engine as defined in claim 10 , wherein the baffle includes a varying thickness between the front bearing face and the rear bearing face.

19. The gas turbine engine as defined in claim 18 , wherein the thickness of the baffle varies in a radial or circumferential direction.

20. A gas turbine engine comprising:

a centrifugal compressor having an impeller;

a bearing housing located downstream from the impeller, the bearing housing including a bearing within an interior chamber, the bearing rotationally supporting the impeller;

a bearing housing cover at least partially enclosing the bearing housing, the bearing housing comprising:

an annular collar having a flange mountable to an exterior surface of the bearing housing;

an impeller baffle integrated with the annular collar, the impeller baffle having an annular body with a front baffle face positioned adjacent a rear face of the impeller, a rear baffle face having a plurality of stiffening elements extending between the rear baffle face and the annular collar, and a central baffle opening; and

a plurality of air passages extending at least partially axially between the front baffle face and the flange, the plurality of air passages in fluid communication with the interior chamber of the bearing housing;

wherein the bearing housing cover is mounted to an upstream end of the bearing housing; and

a second bearing housing cover mounted to a downstream end of the bearing housing, the second bearing housing cover including a plurality of additional air passages in fluid communication with the plurality of air passages in the bearing housing cover mounted to the upstream end of the bearing housing.