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1. (WO2018162306) TURBINE COMPRISING ADJUSTABLE GUIDE VANES

Pub. No.:    WO/2018/162306    International Application No.:    PCT/EP2018/055001
Publication Date: Fri Sep 14 01:59:59 CEST 2018 International Filing Date: Fri Mar 02 00:59:59 CET 2018
IPC: F01D 17/16
F04D 29/56
Applicants: SIEMENS AKTIENGESELLSCHAFT
Inventors: KUSSIN, Thomas
PURSCHKE, Nils
Title: TURBINE COMPRISING ADJUSTABLE GUIDE VANES
Abstract:
The invention relates to a turbine (2) comprising a housing (4) and at least one adjustable row of guide vanes (7), said row (7) having a plurality of guide vanes (8) distributed around the periphery. Each guide vane (8) is mounted in the housing (4) and is fixedly connected outside the housing (4) to a lever (18). In addition, the turbine (2) comprises an adjusting ring (20), which ring (20) can be adjusted in the peripheral and axial directions and on which ring (20) the levers (18) are pivotally mounted. In order to reduce the amount of maintenance required, according to the invention a number of ball rollers (25) are distributed around the periphery, each ball roller (25) having a bearing shell (27), a number of supporting ball bearings (29) movably mounted in said shell (27) and a running ball bearing (26) rollably mounted on said supporting ball bearings (29). The ball rollers (25) are fastened to the housing (4) or the adjusting ring (20) and the adjusting ring (20) is mounted on the running ball bearings (26), or the running ball bearings (26) are mounted on the housing.