Turbocharger thermal isolation connection
AssigneeGeneral Motors Corporation
InventorsGary R Svihla, Charles Henry Mc Creary, John R. Zagone
Life of this patent
Estimating the term…
Abstract
An engine turbocharger includes a thermal isolation connection between a rotor and compressor section support and an exhaust section including an exhaust duct attached to the rotor support. The connection includes spring biased wear pads allowing sliding motion at one or more interfaces between the exhaust duct and the rotor support to accommodate relative radial thermal growth. Radial key and slot guides between the exhaust duct and rotor support maintain axial alignment of the connected components during relative radial motion at the connecting interfaces.
Claims12
A turbocharger having a rotor with an exhaust driven turbine wheel drivingly connected with an intake charge compressor wheel rotatable on a common axis, said turbocharger comprising:
- a support including an upstanding mounting portion adapted to be secured to a base and a tapering rotor support portion rotatably supporting the rotor on the axis with the compressor wheel disposed on a first axial end of the support portion and the turbine wheel disposed on an opposite second end of the support portion;
- an exhaust duct for conducting exhaust gas passing from the turbine wheel to an exhaust outlet, the support mounting portion connected with the exhaust duct at an interface;
- a plurality of spaced mounts provided at said interface on the support mounting portion, the mounts having axially opposite faces;
- connecting mounts on the exhaust duct and including opposing faces;
- wear pads between and engaging faces of the spaced mounts and the opposing faces of the connecting mounts;
- and
- resilient means urging the spaced mounts and connecting mounts together with a force adequate to retain the support and the exhaust duct in assembly but limited to allow sliding motion of the wear pads on the opposing faces of the connecting mounts and the spaced mounts;
- the wear pads limiting heat transfer from the exhaust duct to the support to prevent high exhaust gas temperatures in the exhaust duct from causing excessive rotor operating temperatures in the support.
A turbocharger having a rotor with an exhaust driven turbine wheel drivingly connected with an intake charge compressor wheel rotatable on a common axis, said turbocharger comprising:
- support means rotatably supporting the rotor on the axis with the compressor wheel disposed on a first axial end of the support and the turbine wheel disposed on an opposite second end of the support;
- exhaust means for conducting exhaust gas passing through the turbine wheel, the support means connected with the exhaust means at an interface;
- a plurality of spaced mounts provided at said interface on one of the support means and the exhaust means, the mounts having axially opposite faces;
- connecting mounts on the other of the support means and the exhaust means and including opposing faces;
- wear pads engaging faces of the spaced mounts and the opposing faces of the connecting mounts;
- resilient means urging the spaced mounts and connecting mounts together with a force adequate to retain the support means and exhaust means in assembly but limited to allow sliding motion of the wear pads on the opposing faces of the connecting mounts and the spaced mounts;
- the wear pads limiting heat transfer from the exhaust means to the support means to prevent high exhaust gas temperatures in the exhaust means from causing excessive operating temperatures in the support means;
- and
- supplemental wear pads between the resilient means and the faces of the connecting mounts opposite from those faces engaging the first named wear pads, the supplemental wear pads acting to further limit heat transfer to the support means.
A turbocharger having a rotor with an exhaust driven turbine wheel drivingly connected with an intake charge compressor wheel rotatable on a common axis, said turbocharger comprising:
- support means rotatably supporting the rotor on the axis with the compressor wheel disposed on a first axial end of the support and the turbine wheel disposed on an opposite second end of the support;
- exhaust means for conducting exhaust gas passing through the turbine wheel, the support means connected with the exhaust means at an interface;
- a plurality of spaced mounts provided at said interface on one of the support means and the exhaust means, the mounts having axially opposite faces;
- connecting mounts on the other of the support means and the exhaust means and including opposing faces;
- wear pads engaging faces of the spaced mounts and the opposing faces of the connecting mounts;
- resilient means urging the spaced mounts and connecting mounts together with a force adequate to retain the support means and exhaust means in assembly but limited to allow sliding motion of the wear pads on the opposing faces of the connecting mounts and the spaced mounts;
- the wear pads limiting heat transfer from the exhaust means to the support means to prevent high exhaust gas temperatures in the exhaust means from causing excessive operating temperatures in the support means;
- and
- radial guide means between the support means and the exhaust means and allowing radial expansion and contraction of the exhaust means relative to the support means while maintaining the support and exhaust means in axial alignment.
A turbocharger having a rotor with an exhaust driven turbine wheel drivingly connected with an intake charge compressor wheel rotatable on a common axis, said turbocharger comprising:
- support means rotatably supporting the rotor on the axis with the compressor wheel disposed on a first axial end of the support and the turbine wheel disposed on an opposite second end of the support;
- exhaust means for conducting exhaust gas passing through the turbine wheel, the support means connected with the exhaust means at an interface;
- a plurality of spaced mounts provided at said interface on one of the support means and the exhaust means, the mounts having axially opposite faces;
- connecting mounts on the other of the support means and the exhaust means and including opposing faces;
- wear pads engaging faces of the spaced mounts and the opposing faces of the connecting mounts;
- resilient means urging the spaced mounts and connecting mounts together with a force adequate to retain the support means and exhaust means in assembly but limited to allow sliding motion of the wear pads on the opposing faces of the connecting mounts and the spaced mounts;
- the wear pads limiting heat transfer from the exhaust means to the support means to prevent high exhaust gas temperatures in the exhaust means from causing excessive operating temperatures in the support means;
- and
- centrally disposed clearance openings in the spaced mounts and central guides projecting from the opposing faces of the connecting mounts and extending through the clearance openings of the spaced mounts, the guides aligning the wear pads with the connecting mounts and allowing sliding of the wear pads on the opposite surface of the spaced mounts.
Dependencies are inferred from the claim text.