Axial-admission steam turbine, especially of double-flow construction

US4571153A · kind A · utility

Assignee

• Kraftwerk Union Aktiengesellschaft · DE

Inventor

• Herbert Keller · Pulheim, DE

Key dates

• Filing date: Mar 15, 1983
• Grant date: Feb 18, 1986
• Expiry date: Mar 15, 2003

Classification

• Technology area (CPC F): Mechanical Engineering; Lighting; Heating
• CPC primary: F01D25/08
• WIPO field: Engines, pumps, turbines
• WIPO sector: Mechanical engineering

Abstract

An axial-admission steam turbine, includes a steam inflow region, guide vane rings including a first guide vane ring, guide vanes of the first guide vane ring having radially inner ends, a shaft being rotatable in a given direction, an annular shaft shield being connected to the radially inner ends of the guide vanes of the first guide vane ring and being disposed in vicinity of the steam inflow region, the annular shaft shield surrounding the shaft at a distance defining a ring canal therebetween, the annular shaft shield having nozzles formed therein for discharging into the ring canal tangentially relative to the shaft as seen in the given direction of rotation of the shaft.