Outer race locating washer
View Patent ↗An assembly for a turbocharger can include a locating washer having an axis and a perimeter that includes a chord segment defined by an apothem measured from the axis; a bearing assembly that includes an outer race having an axis and a perimeter that includes a chord segment defined by an apothem measured from the axis; and a housing that includes a bore for receipt of the bearing assembly and a recess for receipt of the locating washer to space apart the axes of the locating washer and the outer race by a distance greater than the sum of the apothems that provides for contact between the chord segments upon rotation of at least one of the locating washer in the recess and the outer race in the bore. Various other examples of devices, assemblies, systems, methods, etc., are also disclosed.
1. An assembly for a turbocharger, the assembly comprising:
a locating washer having an axis and a perimeter that comprises a chord segment defined by an apothem measured from the axis, a major arc defined by ends of the chord segment and a radius measured from the axis, and a chord segment surface defined in part by the chord segment and in part by at least a portion of an axial thickness of the locating washer;
a bearing assembly that comprises rolling elements that contact an outer race having an axis and a perimeter that comprises a chord segment defined by an apothem measured from the axis, and a chord segment surface defined in part by the chord segment and in part by a portion of an axial length along the outer race; and
a housing that comprises a bore that receives the bearing assembly and a recess that receives the locating washer to space apart the axes of the locating washer and the outer race by a distance that is greater than a sum of the apothems to define a gap distance wherein the gap distance defines in part rotational limits for the outer race and the locating washer and wherein at each of the rotational limits contact exists between a length of the chord segment surface of the locating washer and a length of the chord segment surface of the outer race.
2. The assembly of claim 1 wherein the locating washer comprises a bore.
3. The assembly of claim 2 wherein the bore of the locating washer is centered on the axis of the locating washer.
4. The assembly of claim 1 wherein the bearing assembly comprises an inner race that contacts the rolling elements.
5. The assembly of claim 1 wherein the recess comprises a compressor end recess.
6. The assembly of claim 1 wherein the chord segment of the perimeter of the outer race comprises a compressor end chord segment.
7. The assembly of claim 1 wherein the locating washer comprises a shoulder disposed adjacent to the chord segment surface.
8. The assembly of claim 1 wherein the locating washer comprises a nitrided locating washer.
9. The assembly of claim 1 wherein the outer race comprises a stainless steel outer race.
10. The assembly of claim 1 wherein the housing comprises a lubricant inlet for lubricant to directly or indirectly lubricate the locating washer in the recess.
11. The assembly of claim 1 wherein the locating washer rotates clockwise in the recess to limit clockwise rotation of the outer race and wherein the locating washer rotates counter-clockwise in the recess to limit counter-clockwise rotation of the outer race.
12. The assembly of claim 1 wherein the gap distance defines, in part, limits on clockwise and counter-clockwise rotation of the outer race.
13. A turbocharger comprising:
a compressor wheel disposed in a compressor housing;
a turbine wheel disposed in a turbine housing;
a shaft extending between the turbine wheel and the compressor wheel;
a locating washer having an axis and a perimeter that comprises a chord segment defined by an apothem measured from the axis, a major arc defined by ends of the chord segment and a radius measured from the axis, and a chord segment surface defined in part by the chord segment and in part by at least a portion of an axial thickness of the locating washer;
a bearing assembly that comprises rolling elements that rotatably support of the shaft and an outer race having an axis and a perimeter that comprises a chord segment defined by an apothem measured from the axis, and a chord segment surface defined in part by the chord segment and in part by a portion of an axial length along the outer race; and
a center housing disposed between the compressor housing and the turbine housing wherein the center housing comprises a bore that receives the bearing assembly and a recess that receives the locating washer to space apart the axes of the locating washer and the outer race by a distance that is greater than a sum of the apothems to define a gap distance wherein the gap distance defines in part rotational limits for the outer race and the locating washer and wherein at each of the rotational limits contact exists between a length of the chord segment surface of the locating washer and a length of the chord segment surface of the outer race.
14. The turbocharger of claim 13 wherein the locating washer rotates clockwise in the recess to limit clockwise rotation of the outer race and wherein the locating washer rotates counter-clockwise in the recess to limit counter-clockwise rotation of the outer race.
15. The turbocharger of claim 13 wherein the gap distance defines, in part, limits on clockwise and counter-clockwise rotation of the outer race.
16. A method comprising:
operating a turbocharger that comprises a shaft extending between a turbine wheel and a compressor wheel, the shaft supported by a bearing assembly that comprises rolling elements that contact an outer race having an axis and a perimeter that comprises a chord segment defined by an apothem measured from the axis, the outer race disposed in a bore of a housing that comprises a recess that seats a locating washer having an axis and a perimeter that comprises a chord segment defined by an apothem measured from the axis and a major arc defined by ends of the chord segment and a radius measured from the axis;
rotating the outer race clockwise or counter-clockwise;
responsive to the rotating, contacting a length of the chord segment of the perimeter of the outer race and a length of the chord segment of the perimeter of the locating washer; and
responsive to the rotating and the contacting, rotating the locating washer clockwise or counter-clockwise in the recess to achieve a static position of the locating washer that limits the rotating of the outer race.
17. The method of claim 16 further comprising rotating the outer race in an opposite direction.
18. The method of claim 17 further comprising responsive to the rotating in an opposite direction, contacting a length of the chord segment of the perimeter of the outer race and a length of the chord segment of the perimeter of the locating washer and, responsive to the rotating in the opposite direction and the contacting, rotating the locating washer in the recess to achieve a static position of the locating washer that limits the rotating in the opposite direction of the outer race.