Structure of radial turbine scroll
First Claim
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, andwherein the passage width of said opening becomes smaller toward the tongue portion along the circumferential direction.
2 Assignments
0 Petitions
Accused Products
Abstract
In a radial turbine scroll, an operating gas is led to flow in the radial direction 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, so as to act on the turbine moving blades, and then led to flow outside in an axial direction, thereby rotatively driving the turbine rotor, wherein the scroll 4 has a partition plate 20 a length of a certain range on a line of a tongue portion formed on the inner periphery of a gas inlet portion or has a reduced height between scroll side walls at an outlet portion of a tongue portion 21 formed on the inner periphery of a gas inlet portion of the scroll.
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Citations
7 Claims
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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.
Specification