Seal ring mounting method for turbocharger, and turbocharger
View Patent ↗It is intended to provide a seal ring mounting method for a turbocharger and a turbocharger with the seal ring, whereby the seal ring is less likely to be affected by other parts. An annular protrusion ( 12 j ) for restricting a position of a seal ring ( 16 ) in the radial direction is provided at a tip portion ( 12 h ) of an inner peripheral wall ( 12 b ) of a turbine housing ( 12 ), and the seal ring ( 16 ) is mounted between a side surface ( 36 c ) of a nozzle plate ( 36 ) and a first step portion ( 12 k ) of the tip portion ( 12 h ) of the inner peripheral wall ( 12 b ) so that the outer periphery of the seal ring ( 16 ) is restrained by the annular projection ( 12 j ).
1. A turbocharger comprising:
a scroll formed in a turbine housing;
a plurality of nozzle vanes provided on an inner peripheral side in a radial direction of the scroll;
a turbine wheel arranged on an inner peripheral side relative to the plurality of nozzle vanes;
an annular nozzle mount;
an annular nozzle plate attached to the annular nozzle mount, the annular nozzle plate and the annular nozzle mount being arranged sandwiching the plurality of nozzle vanes on the inner peripheral side in the radial direction of the scroll to rotatably support the plurality of nozzle vanes;
an annular seal ring arranged to seal a gap between a side face of the annular nozzle plate and an end face of an inner peripheral wall of the turbine housing in a rotation axis direction of the turbine wheel, the inner peripheral wall of the turbine housing being provided opposing the side face of the annular nozzle plate to form an inner wall of the scroll, the inner peripheral wall of the turbine housing having a tubular shape to form an exhaust gas discharge port disposed on an exhaust-gas downstream side of the turbine wheel; and
a radial-direction restriction part provided at a tip portion of the inner peripheral wall of the turbine housing and on an outer peripheral side relative to the radial direction of the annual seal ring so as to restrict an outer peripheral part of the seal ring in a radial direction,
wherein the seal ring is mounted between the side face of the annular nozzle plate and the end face of the inner peripheral wall of the turbine housing in the rotation axis direction of the turbine wheel in such a state that the seal ring is compressed in the rotation axis direction of the turbine wheel so that the outer peripheral part of the seal ring is restricted by the radial-direction restriction part, and
wherein the annular seal ring is integrally formed by:
a seal body part;
an annular plate part extending outward in a radial direction from one side of the seal body part; and
a cylindrical part extending from an outer peripheral edge of the annular plate part in a direction opposite to the seal body part with the annular plate part.
2. The turbocharger according to claim 1 ,
wherein the radial-direction restriction part is constituted by an outer peripheral surface disposed at the tip portion of the inner peripheral wall of the turbine housing.
3. The turbocharger according to claim 1 ,
wherein the annular seal ring has a V-shaped cross-section formed such that a center of a width of the annular seal ring is depressed inward in the radial direction.
4. The turbocharger according to claim 2 ,
wherein the annular seal ring has a V-shaped cross-section formed such that a center of a width of the annular seal ring is depressed inward in the radial direction.