Variable turbine geometry turbocharger vane ring assembly retention device
AssigneeBorgWarner Inc.
InventorsElias Alan Morgan, Greg Williams
Life of this patent
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Abstract
A variable turbine geometry turbine turbocharger (1) includes a vane ring assembly (29) configured to control flow of exhaust gas to a turbine wheel (12), and retainers (60, 160) that are used to secure the vane ring assembly (29) to the bearing housing (16) in a desired axial and radial position and angular orientation relative to the bearing housing (16). In some embodiments, the vane ring assembly (29) is spring biased toward an axially outward position relative to the bearing housing (16), and the retainers (60, 160) retain the vane (30) ring in the desired position against the spring bias.
Claims10
A variable turbine geometry turbocharger (1) comprising
- a bearing housing (16) including a bore (15) that defines a longitudinal axis (R);
- a turbine housing (4) secured to the bearing housing (16) and defining an exhaust gas inlet (6), an exhaust gas outlet (8) and a volute (10) disposed between the exhaust gas inlet (6) and the exhaust gas outlet (8);
- a turbine wheel (12) disposed in the turbine housing (4) between the volute (10) and the exhaust gas outlet (8);
- a vane ring assembly (29) disposed in the turbine housing (4) between the volute (10) and the turbine wheel (12), the vane ring assembly (29) including pivotable vanes (30) disposed about the circumference of the turbine wheel (12) and controlling the flow of exhaust gas to the turbine wheel (12);
- the vane ring assembly (29) comprises an upper vane ring (34) disposed between the vanes (30) and the bearing housing (16), and a lower vane ring (38);
- at least three retainers (60, 160) that secure the vane ring assembly (29) to the bearing housing (16) and which are spaced apart along an outer peripheral circumference of the vane ring assembly (29);
- wherein the at least three retainers (60, 160) each comprise a first end (61) that is fixed to the bearing housing (16) and a second end (62) that engages a corresponding slot (54, 54′) on an axially outward facing surface of the upper vane ring of the vane ring assembly (29);
- the bearing housing (16) includes surface features (17) that engage the respective first ends (61) of each of the at least three retainers (160);
- and
- whereby the at least three retainers (160) serves to retain the vane ring assembly (29) in a predetermined rotational orientation relative to the bearing housing (16).
Dependencies are inferred from the claim text.