Patent ID: 8591177
Filing Date: 2013-11-26
Classification: F01D,F05D

Abstract:
1. A structure of a radial turbine scroll in which an operating gas flows from a spiral scroll formed in a turbine casing into turbine moving blades of a turbine rotor, which is positioned on the inner side of the scroll, in a radial direction to act on the turbine moving blades, and then flows out in an axial direction, thereby rotatively driving the turbine rotor, wherein the scroll has a tongue portion formed on an inner periphery of a gas inlet portion and a partition plate formed on an extended center line of the tongue portion in a circumferential direction, further at some part of a passage width in the width direction, an opening is formed to provide vertical communication between an upper space on an outer side and a lower space on an inner side in the radial direction of the scroll through a part without the partition plate, wherein the passage width of said opening is changed in a circumferential direction of said partition plate or in a cross-section direction from said upper space to the lower space of the partition plate, and wherein the passage width of said opening becomes smaller toward the tongue portion along the circumferential direction.