Variable geometry turbocharger lower vane ring retaining system
AssigneeBorgWarner Inc.
InventorsGeorg Scholz, Richard Hall, George E. Heddy, III
Life of this patent
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Abstract
A vane ring assembly which includes a lower vane ring (22), an upper vane ring (30), one or more guide vanes (80) positioned at least partially between the vane rings, and a plurality of spacers (42, or 50) positioned between the lower and upper vane rings for maintaining a distance between the lower and upper vane rings. By using a first set of fasteners (190) to fasten the lower vane ring to the turbine housing, and a second set of fasteners (191) to fasten the lower vane ring to the upper vane ring, the vane ring assembly is effectively decoupled from the turbine housing with regard to differential thermal expansion, and the co-planerism of the vane rings is easier to maintain.
Claims13
A turbocharger comprising:
- a turbine housing (100);
- a vane ring assembly, comprising a lower vane ring (20, 21, 22, 23), an upper vane ring (30, 31), one or more guide vanes (80) pivotably mounted at least partially between said lower vane ring and said upper vane ring, and at least one spacer (50) positioned between said lower vane ring and said upper vane ring for maintaining a distance between said lower vane ring and said upper vane ring;
- one or more fasteners (190) directly fastening said lower vane ring (20) to said turbine housing (100) but not to said upper vane ring (30), the one or more fasteners extending in a substantially axial direction of the vane ring assembly, and
- one or more fastener assemblies (191, 43) attaching said lower vane ring (20) to said upper vane ring (30) but not to said turbine housing (100).
A turbocharger comprising:
- a turbine housing;
- a vane ring assembly including a lower vane ring, an upper vane ring, one or more guide vanes pivotably mounted at least partially between the lower vane ring and the upper vane ring, and at least one spacer positioned between the lower vane ring and the upper vane ring for maintaining a distance between the lower vane ring and the upper vane ring;
- one or more fasteners directly fastening the lower vane ring to the turbine housing but not to the upper vane ring, the one or more fasteners preventing the lower vane ring from moving relative to the turbine housing in a substantially axial direction of the vane ring assembly, and
- one or more fasteners attaching the lower vane ring to the upper vane ring but not to the turbine housing.
Dependencies are inferred from the claim text.