Patent ID: 9371833
Filing Date: 2016-06-21
CPC Classification: F01D,F02B,F04D,F05D,Y02T

Claim Text:
1. A variable turbine geometry, comprising: a blade bearing ring and a plurality of guide blades each rotatably mounted on the blade bearing ring via an associated blade bearing pin of a plurality of blade bearing pins, the plurality of guide blades each including at least a guide blade vane and a guide blade root; an adjusting ring surrounded by a control space for adjusting the rotary position of the plurality of guide blades arranged on a side of the blade bearing ring facing away from the guide blade vane of the plurality of guide blades; wherein the guide blade vane of the respective guide blades is arranged in a flow space between the blade bearing ring and a cover disc; wherein the cover disc defines a plurality of through-openings aligned with the plurality of blade bearing pins; wherein the blade bearing ring defines at least one channel configured to create a pressure equalization between the control space and the flow space, wherein the at least one channel extends annularly and surrounds the associated blade bearing pin of at least one guide blade of the plurality of guide blades; and wherein the blade bearing ring further defines a recess disposed under the guide blade root of the at least one guide blade.