IPC분류정보
국가/구분 |
United States(US) Patent
등록
|
국제특허분류(IPC7판) |
|
출원번호 |
US-0328653
(2008-12-04)
|
등록번호 |
US-8328506
(2012-12-11)
|
발명자
/ 주소 |
- Furman, Anthony Holmes
- Swenson, Kendall Roger
- Loringer, Daniel Edward
- Panambur, Suresha Kumar
|
출원인 / 주소 |
|
대리인 / 주소 |
GE Global Patent Operation
|
인용정보 |
피인용 횟수 :
4 인용 특허 :
6 |
초록
▼
A turbocharger system, in certain embodiments, includes a compressor, a turbine, a shaft of common diameter coupling the compressor to the turbine, and a first fluid film bearing disposed about the shaft at a compressor end portion of the shaft. The system also includes a second fluid film fixed pad
A turbocharger system, in certain embodiments, includes a compressor, a turbine, a shaft of common diameter coupling the compressor to the turbine, and a first fluid film bearing disposed about the shaft at a compressor end portion of the shaft. The system also includes a second fluid film fixed pad bearing disposed about the shaft at a turbine end portion of the shaft, wherein the first and second fluid film fixed pad bearings have different clearance ratios, effective lengths, or both, relative to one another. The system, in some embodiments, includes a compressor fluid film fixed pad bearing and a turbine fluid film fixed pad bearing, wherein the compressor and turbine fluid film fixed pad bearings have different clearance ratios and effective lengths, relative to one another.
대표청구항
▼
1. A turbocharger, comprising: a compressor;a turbine;a shaft of common diameter coupling the compressor to the turbine;a first fluid film fixed pad bearing disposed about the shaft at a compressor end portion of the shaft; anda second fluid film fixed pad bearing disposed about the shaft at a turbi
1. A turbocharger, comprising: a compressor;a turbine;a shaft of common diameter coupling the compressor to the turbine;a first fluid film fixed pad bearing disposed about the shaft at a compressor end portion of the shaft; anda second fluid film fixed pad bearing disposed about the shaft at a turbine end portion of the shaft, wherein the first and second fluid film fixed pad bearings have different clearance ratios and different effective lengths, relative to one another. 2. The turbocharger of claim 1, wherein the first fluid film fixed pad bearing has a first clearance ratio measuring at least about 10% less than a second clearance ratio of the second fluid film fixed pad bearing. 3. The turbocharger of claim 2, wherein the first fluid film fixed pad bearing has a first effective length measuring at least about 30% more than a second effective length of the second fluid film fixed pad bearing. 4. The turbocharger of claim 3, wherein the differences in the first and second clearance ratios and the first and second effective lengths are configured to reduce imbalance load in the first and second fluid film fixed pad bearings due to imbalance in the rotor caused by deposition on blades of the turbine over time. 5. The turbocharger of claim 4, wherein the differences in the first and second clearance ratios and the first and second effective lengths are configured to reduce a subsynchronous vibration in the first and second fluid film fixed pad bearings. 6. The turbocharger of claim 3, wherein the differences in the first and second clearance ratios and the first and second effective lengths are configured to reduce an imbalance load on the bearings in the turbocharger caused by exhaust deposits on blades of a turbine wheel. 7. The turbocharger of claim 3, wherein the first fluid film fixed pad bearing comprises an increased first drop dimension and the second fluid film fixed pad bearing comprises an increased second drop dimension, and wherein the increased first and second drop dimensions reduce a temperature rise of oil through the bearings resulting in reduced parasitic power loss in the turbocharger. 8. A turbocharger system, comprising: a compressor fluid film fixed pad bearing; anda turbine fluid film fixed pad bearing, wherein the compressor and turbine fluid film fixed pad bearings have different clearance ratios and different effective lengths, relative to one another. 9. The turbocharger system of claim 8, comprising an engine coupled to the turbocharger system. 10. The turbocharger system of claim 8, comprising a vehicle that includes the turbocharger system. 11. A method, comprising: adjusting a first set of parameters including at least one of a first effective length or a first clearance ratio of a first fluid film fixed pad bearing of a rotor assembly; andadjusting a second set of parameters including at least one of a second effective length or a second clearance ratio of a second fluid film fixed pad bearing of the rotor assembly, wherein the first and second sets of parameters are different from one another. 12. The method of claim 11, wherein adjusting the first set comprises increasing the first effective length and increasing the first clearance ratio. 13. The method of claim 12, wherein increasing the first effective length increases stability, and increasing the first clearance ratio reduces imbalance loads in the first fluid film fixed pad bearing caused by synchronous imbalance in the rotor assembly. 14. The method of claim 13, wherein increasing the first effective length increases stability to account for a decrease in stability of the rotor assembly associated with increasing the first clearance ratio in the first fluid film fixed pad bearing and increasing the second clearance ratio in the second fluid film fixed pad bearing. 15. The method of claim 11, wherein adjusting the second set comprises increasing the second clearance ratio. 16. The method of claim 15, wherein increasing the second clearance ratio reduces loads in the second fluid film fixed pad bearing caused by synchronous imbalance in the rotor assembly. 17. The method of claim 11, wherein the first and second fluid film fixed pad bearings are disposed at different axial positions along a common rotatable component. 18. The method of claim 17, wherein the first fluid film fixed pad bearing is disposed at a compressor end portion of a turbocharger, and the second fluid film fixed pad bearing is disposed at a turbine end portion of the turbocharger. 19. A method, comprising: increasing a first contribution to reducing imbalance in a first fluid film fixed pad bearing;compensating for a decrease in stability of the first fluid film fixed pad bearing; andincreasing a second contribution to reducing imbalance in a second fluid film fixed pad bearing, wherein the first contribution is at a first end of a journal shaft and the second contribution is at a second end of the journal shaft. 20. The method of claim 19, wherein increasing the first contribution comprises increasing a first effective length and increasing a first clearance ratio of the first fluid film fixed pad bearing. 21. The method of claim 20, wherein compensating comprises increasing the first effective length of the first fluid film fixed pad bearing. 22. The method of claim 19, wherein increasing the second balance comprises increasing a second clearance ratio of the second fluid film fixed pad bearing. 23. A system, comprising: a shaft;a first fluid film fixed pad bearing disposed about the shaft at a first end portion of the shaft, wherein the first fluid film fixed pad bearing comprises a first clearance ratio, a first effective length, and a first drop; anda second fluid film fixed pad bearing disposed about the shaft at a second end portion of the shaft, wherein the second fluid film fixed pad bearing comprises a second clearance ratio, a second effective length, and a second drop;wherein the first effective length, the first clearance ratio, and the first drop are adjusted to increase stability in the first fluid film fixed pad bearing and reduce imbalance loads;wherein the second clearance ratio and the second drop are adjusted to increase the stability in the second fluid film fixed pad bearing and reduce loads caused by synchronous imbalance in a rotor.
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