Turbocharger assembly
A turbocharger assembly can include a housing that includes a bore defined by a bore wall and a pin socket that forms an opening in the bore wall; a bearing that includes a pin opening defined by a pin opening surface; a pin, where the pin includes a longitudinal pin axis and a pin surface; a groove in the pin opening surface or the pin surface, where the groove includes an axial length; wherein, in a positioned state of bearing in the bore and the pin in the pin socket with part of the pin in the pin opening, a clearance exists between the bearing and the bore wall, where the groove is in fluid communication with the clearance to form a supply path for lubricant from the clearance to an interface between the pin surface and the pin opening surface.
1. A turbocharger assembly comprising:
a housing that comprises a bore defined by a bore wall and a pin socket that forms an opening in the bore wall;
a bearing that comprises a pin opening defined by a pin opening surface;
a pin, wherein the pin comprises a longitudinal pin axis and a pin surface; and
a groove in the pin opening surface or the pin surface, wherein the groove comprises an axial length;
wherein, in a positioned state of bearing in the bore and the pin in the pin socket with part of the pin in the pin opening, a clearance exists between the bearing and the bore wall, wherein the groove is in fluid communication with the clearance to form a supply path for lubricant from the clearance to an interface between the pin surface and the pin opening surface, and
wherein, in an operational state of the turbocharger assembly, the supply path for lubricant from the clearance to the interface between the pin surface and the pin opening surface supplies lubricant that damps energy at the interface generated by movement of the bearing.
2. The turbocharger assembly of claim 1 , wherein the groove is in the pin surface.
3. The turbocharger assembly of claim 1 , wherein the bearing comprises a rolling element bearing assembly.
4. The turbocharger assembly of claim 1 , wherein the bearing comprises an outer race wherein the pin opening surface is a surface of the outer race.
5. The turbocharger assembly of claim 1 , wherein the bearing is a journal bearing.
6. The turbocharger assembly of claim 1 , wherein the clearance defines a lubricant film region.
7. The turbocharger assembly of claim 6 , wherein the lubricant film region comprises a squeeze film damper region.
8. The turbocharger assembly of claim 1 , wherein the pin surface comprises a plurality of grooves.
9. The turbocharger assembly of claim 1 , wherein the pin opening surface comprises a plurality of grooves.
10. The turbocharger assembly of claim 1 , wherein the groove is a groove in the pin surface and further comprising another groove in the pin opening surface.
11. The turbocharge assembly of claim 1 , wherein, in the positioned state, the groove is aligned with a longitudinal axis of the bore of the housing.
12. The turbocharger assembly of claim 1 , wherein, in the positioned state, the bearing is translatable to form a contact between the pin surface and the pin opening surface.
13. The turbocharger assembly of claim 1 , wherein, in the positioned state, the groove is oriented orthogonally to a longitudinal axis of the bore of the housing.
14. The turbocharger assembly of claim 1 , wherein, in the positioned state, the bearing is rotatable clockwise or counter-clockwise to form a contact between the pin surface and the pin opening surface.
15. The turbocharger assembly of claim 1 , comprising at least four grooves wherein movement of the bearing comprises at least one of rotational movement and axial movement.
16. The turbocharger assembly of claim 1 , wherein the groove is a pin surface groove and wherein the pin comprises a head portion that comprises a marker for orientation of the groove in the bore of the housing.
17. The turbocharger assembly of claim 1 , wherein the groove is a pin surface groove, wherein the pin comprises an end surface and wherein the groove does not extend to the end surface.
18. A method comprising:
during operation of a turbocharger, flowing lubricant to a lubricant film region between a bearing and a bore wall of a housing, wherein a pin extends from an opening in the bore wall into a pin opening defined by a pin opening surface of the bearing, and wherein a groove exists at an interface between a pin surface of the pin and the pin opening surface of the bearing; and
flowing at least a portion of the lubricant from the lubricant film region to the interface between the pin opening surface and the pin surface via the groove.
19. The method of claim 18 , wherein the at least a portion of the lubricant, at the interface, damps energy generated by movement of the bearing.
20. A turbocharger assembly comprising:
a housing that comprises a bore defined by a bore wall and a pin socket that forms an opening in the bore wall;
a bearing that comprises a pin opening defined by a pin opening surface;
a pin, wherein the pin comprises a longitudinal pin axis and a pin surface; and
a groove in the pin surface, wherein the groove comprises an axial length;
wherein, in a positioned state of bearing in the bore and the pin in the pin socket with part of the pin in the pin opening, a clearance exists between the bearing and the bore wall, wherein the groove is in fluid communication with the clearance to form a supply path for lubricant from the clearance to an interface between the pin surface and the pin opening surface, and wherein the axial length of the groove overlaps at least a portion of the clearance and at least a portion of the pin opening surface to form the supply path for lubricant from the clearance to the interface between the pin surface and the pin opening surface.