Turbocharger bearing damper assembly
View Patent ↗A turbocharger system can include a housing that includes a bore defined at least in part by a bore wall; a rolling element bearing unit that includes an outer race; and a mixed-element damper assembly disposed at least in part between the outer race and the bore wall where the mixed-element damper assembly includes a lobed-spring element and a squeeze film damper element.
1. A turbocharger system comprising:
a housing that comprises a bore defined at least in part by a bore wall;
a rolling element bearing unit that comprises an outer race; and
a mixed-element damper assembly disposed at least in part between the outer race and the bore wall wherein the mixed-element damper assembly comprises a lobed-spring element and a squeeze film damper element and wherein the squeeze film damper element comprises a squeeze film damper ring element.
2. The turbocharger system of claim 1 wherein the lobed-spring element comprises radially inwardly extending lobes.
3. The turbocharger system of claim 2 wherein the squeeze film damper element is disposed at least in part radially between the radially inwardly extending lobes and the outer race.
4. The turbocharger system of claim 1 wherein the lobed-spring element comprises radially outwardly extending lobes.
5. The turbocharger system of claim 4 wherein the lobed-spring element comprises radially inwardly extending lobes.
6. The turbocharger system of claim 4 wherein the radially outwardly extending lobes contact the bore wall.
7. The turbocharger system of claim 1 comprising at least two lobed-spring elements.
8. The turbocharger system of claim 7 wherein at least two of the two lobed-spring elements differ in lobe shape of radially inwardly extending lobes.
9. The turbocharger system of claim 1 wherein the squeeze film damper element comprises a lubricant opening.
10. The turbocharger system of claim 1 wherein the squeeze film damper element defines a low pressure squeeze film space and a high pressure squeeze film space.
11. The turbocharger system of claim 1 wherein the mixed-element damper assembly comprises keys and keyways that orient the lobed-spring element with respect to the squeeze film damper element.
12. The turbocharger system of claim 1 comprising an end cap that is coupled to the lobed-spring element that is coupled to a spacer that is coupled to another lobed-spring element.
13. The turbocharger system of claim 12 comprising another spacer that is coupled to the other lobed-spring element.
14. The turbocharger system of claim 1 wherein the lobed-spring element and the squeeze film damper element comprise compressor side elements and further comprising another lobed-spring element and another squeeze film damper element that comprise turbine side elements.
15. The turbocharger system of claim 1 wherein the lobed-spring element and the squeeze film damper element act in series.
16. The turbocharger system of claim 15 comprising another lobed-spring element that acts in parallel to the in series elements.
17. A turbocharger system comprising:
a housing that comprises a bore defined at least in part by a bore wall;
a rolling element bearing unit that comprises an outer race; and
a mixed-element damper assembly disposed at least in part between the outer race and the bore wall wherein the mixed-element damper assembly comprises a lobed-spring element and a squeeze film damper element and wherein the squeeze film damper element defines a low pressure squeeze film space and a high pressure squeeze film space.
18. A turbocharger system comprising:
a housing that comprises a bore defined at least in part by a bore wall;
a rolling element bearing unit that comprises an outer race; and
a mixed-element damper assembly disposed at least in part between the outer race and the bore wall wherein the mixed-element damper assembly comprises a lobed-spring element and a squeeze film damper element and wherein the mixed-element damper assembly comprises keys and keyways that orient the lobed-spring element with respect to the squeeze film damper element.
19. A turbocharger system comprising:
a housing that comprises a bore defined at least in part by a bore wall;
a rolling element bearing unit that comprises an outer race; and
a mixed-element damper assembly disposed at least in part between the outer race and the bore wall wherein the mixed-element damper assembly comprises a lobed-spring element and a squeeze film damper element and wherein the lobed-spring element and the squeeze film damper element act in series.
20. The turbocharger system of claim 19 comprising another lobed-spring element that acts in parallel to the in series elements.