A product for use with a turbocharger is disclosed. The product may include a housing with an opening extending through at least part of the housing. An outer bearing race may be positioned in the opening. An inner bearing race may be rotatably positioned in the outer bearing race. A turbine wheel m
A product for use with a turbocharger is disclosed. The product may include a housing with an opening extending through at least part of the housing. An outer bearing race may be positioned in the opening. An inner bearing race may be rotatably positioned in the outer bearing race. A turbine wheel may be fixed to one end of the inner bearing race. A compressor wheel may be fixed to another end of the inner bearing race. The inner bearing race may be comprised of one, two, or more race sections. The turbine wheel may be connected to the compressor wheel only through the inner bearing race or race sections.
대표청구항▼
1. A product for use with a turbocharger system comprising: a housing with an opening extending through at least part of the housing;an outer bearing race positioned in the opening, and fixed relative to the housing;a first inner bearing race rotatably positioned in the outer bearing race;a turbine
1. A product for use with a turbocharger system comprising: a housing with an opening extending through at least part of the housing;an outer bearing race positioned in the opening, and fixed relative to the housing;a first inner bearing race rotatably positioned in the outer bearing race;a turbine wheel fixed to the first inner bearing race;a second inner bearing race rotatably positioned in the outer bearing race; anda compressor wheel fixed to the second inner bearing race;the first and second inner bearing races separate from one another and mating at a junction;wherein the turbine wheel is fixedly connected to the compressor wheel only through the first and second inner bearing races which are connected at the junction. 2. The product according to claim 1 wherein the inner bearing race includes a first inner bearing race section connected to the compressor wheel and a second inner bearing race section connected to the turbine wheel and further comprising an inner race section connected between the first inner bearing race section and the second inner bearing race section, wherein the inner race section includes first and second reduced diameter segment extending into the first and second inner bearing race sections respectively, and includes shoulders against which the first and second inner bearing race sections engage, and the inner race section is secured to the first and second inner bearing race sections so that the inner race section and the first and second inner bearing race sections rotate together as a unit. 3. The product according to claim 1 wherein the turbine wheel includes a first stub pressed into the first inner bearing race and wherein the compressor wheel includes a second stub pressed into the second inner bearing race, and wherein the first stub does not directly contact the second stub so that an open space is defined within the first and second inner bearing races between the first stub and the second stub. 4. The product according to claim 1 wherein the housing has a bottom below the outer bearing race that defines a second opening wherein a first inner bearing race section is connected to the compressor wheel and a second inner bearing race section is connected to the turbine wheel wherein the first inner bearing race section overlaps the second inner bearing race section at the junction when the first and second inner bearing race sections are positioned in the outer bearing race, wherein the outer bearing race has a side that defines a third opening that is aligned with the second opening. 5. The product according to claim 4 wherein the turbine and compressor wheels rotate about a central axis and wherein a radial direction is defined perpendicular to the central axis and further comprising a pin connecting the first and second inner bearing races at the junction, the pin elongated in the radial direction and aligned with the second and third openings. 6. The product according to claim 4 further comprising a pin, wherein the first and second inner bearing race sections are connected by the pin. 7. The product according to claim 4 wherein the first inner bearing race section has a first notched end and wherein the second inner bearing race section has a second notched end that mates with the first notched end. 8. The product according to claim 1 wherein the turbine wheel has a first extension that includes a stub extending into the first inner bearing race and includes an enlarged segment adjacent the stub, the enlarged segment disposed outside and spaced apart from the inner bearing race, and the enlarged segment has a diameter larger than the stub, the enlarged segment fitted in an end opening of the housing and supported by the housing, and wherein the compressor wheel includes a wheel section and a second extension extending from the wheel section to a terminal end, and the second extension has a constant diameter from the wheel section to the terminal end. 9. The product according to claim 1 wherein the housing includes a turbine end wall defining an end opening, the turbine wheel includes a first extending stub that includes an enlarged segment positioned in the end opening and supported on the turbine end wall, the compressor wheel includes a second extending stub, and further comprising a seal assembly supported on the housing, the second extending stub extending through the seal assembly, and an insert seated on the housing, the second stub extending through the insert and supported thereby. 10. A product for use with a turbocharger system comprising: a turbine wheel that has a first extending stub, the turbine wheel configured to rotate in response to a flow of exhaust gas;a compressor wheel that has a second extending stub, the compressor wheel configured to compress gas;a bearing assembly rotatably supporting the turbine wheel and the compressor wheel to rotate about a central axis, the bearing assembly has an inner race rotatably supported in an outer race, the inner race connecting the turbine wheel with the compressor wheel and defining an open shaft within the inner race that extends along the central axis with a first end and a second end and that presents an open area, wherein the first extending stub extends into the open shaft through the first end and the second extending stub extends into the open shaft through the second end and the first extending stub does not directly contact the second extending stub so that the open shaft remains open across the central axis, the open area being unobstructed from the first extending stub to the second extending stub, reducing heat transfer there between. 11. The product according to claim 10 wherein the inner bearing race is supported in the outer bearing race by rolling balls, wherein inner bearing race includes first and second inner bearing races and the first and second inner bearing races define the open shaft. 12. The product according to claim 11 wherein the bearing assembly further comprises an inner race section connected between the first and second inner bearing races, the inner race section comprising a ceramic material that resists heat transfer and the inner race section includes a first extension extending into the first inner bearing race and includes a second extension extending into the second inner bearing race. 13. A product comprising a turbocharger with a turbine wheel, a compressor wheel connected to rotate together with the turbine wheel, a housing positioned between the turbine wheel and the compressor wheel, the housing containing a bearing that has an inner race supported by a number of balls to rotate relative to the housing, wherein the compressor and turbine wheels rotate about a central axis, wherein the inner race defines an open shaft that extends along the central axis within the inner race and has a first end and a second end, wherein the turbine wheel includes a first extending stub that extends into the open shaft through the first end and the compressor wheel includes a second extending stub that extends into the open shaft through the second end, and the first extending stub does not directly contact the second extending stub, wherein a segment of the open shaft remains completely open in an axial direction along a length of the central axis between the first extending stub and the second extending stub and the segment of the open shaft also remains completely open in a radial direction across the central axis to inhibit heat transfer from the turbine wheel to the compressor wheel so that an open space is bounded only by the inner race and the first and second extending stubs, and wherein the inner race, first extending stub, and the second extending stub are the sole elements that rotatably connect the turbine wheel and the compressor wheel. 14. The product according to claim 13 wherein the housing includes a turbine end wall defining an end opening, the first extending stub including an enlarged segment positioned in the end opening and supported on the turbine end wall, and further comprising a seal assembly supported on the housing, the second extending stub extending through the seal assembly, and an insert seated on the housing, the second stub extending through the insert and supported thereby. 15. The product according to claim 14 further comprising a seal ring sealing between the enlarged segment and the turbine end wall in the end opening, and a flinger positioned between the second extending stub and the insert. 16. The product according to claim 13 wherein the inner race comprises a hollow cylindrical structure that is centered on the central axis and that extends in an axial direction along the central axis and that defines the open shaft with a first end and a second end, the inner race further comprising a first inner bearing race section that extends from the first end toward the second end and a second inner bearing race section that extends from the second end toward the first end wherein a gap is defined between the first inner bearing race section and the second inner bearing race section, and an inner race section is positioned in the gap, the inner race section including a first extension extending into the first inner bearing race section and including a second extension extending into the second inner bearing race section. 17. The product according to claim 13 wherein the turbocharger includes a turbine end that contains the turbine wheel and that defines a volute channeling exhaust gas to the turbine wheel and includes a compressor end that contains the compressor wheel and that collects air charged by the compressor wheel, the product inhibiting heat transfer from the exhaust gas to the compressor wheel and the air. 18. The product according to claim 13 further comprising a pin wherein the inner race comprises a first inner bearing race and an overlapping second inner bearing race, and the pin extends across the central axis and through the first and second inner bearing races. 19. A method of constructing a product according to claim 13 comprising: providing the housing;providing an outer bearing race wherein the outer bearing race has a first end, a second end opposite the first end, and an opening between the first and second ends;providing the inner race with a first inner bearing race that has a first inner edge;providing the inner race with a second inner bearing race that has a second inner edge;positioning the first inner bearing race inside the outer bearing race through the first end so that the first edge faces inside the outer bearing race;positioning the second inner bearing race inside the outer bearing race through the second end so that the second inner edge abuts the first inner edge;attaching the first inner edge to the second inner edge;positioning the outer bearing race in the housing;attaching a turbine wheel to the first inner bearing race; andattaching a compressor wheel to the second inner bearing race. 20. The method according to claim 19 including the steps of: accessing through the opening the first and second inner bearing races, and joining the first inner edge to the second inner edge. 21. The method according to claim 19 including the step of providing a splined connection between the first inner bearing race and the second inner bearing race. 22. The method according to claim 19 including the steps of: casting the turbine wheel with an integral first stub;casting the compressor wheel with an integral second stub;pressing the first stub into the first inner bearing race; andpressing the second stub into the second inner bearing race. 23. The method according to claim 19 including the step of providing an open air gap in the first and second inner bearing races between the turbine wheel and the compressor wheel. 24. The method according to claim 19 further comprising cutting a notch in each of the first and second inner edges. 25. The method according to claim 19 further comprising forming a slant in each of the first and second inner edges. 26. The method according to claim 19 further comprising cutting castellation notches in each of the first and second inner edges. 27. The method according to claim 19 further comprising forming an inward facing splined section at the first inner edge;forming an outward facing splined section at the second inner edge; andinserting the second inner edge into the first inner edge. 28. The method according to claim 19 further comprising positioning a heat transfer resistant section between the first and second inner edges.
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이 특허에 인용된 특허 (11)
Witchger Eugene S. (210 W. 77th St. Indianapolis IN 46260), Accelerating means and method for turbocharger.
Krger Wolfgang (Reichertshausen DEX), Arrangement for connecting a ceramic rotor wheel, particularly a turbine rotor wheel of a turbomachine, such as a gas tu.
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