Self-locking nozzle blocks for steam turbines

Patent · Tue Aug 06 04:00:00 EDT 1991

OSTI ID:5669042

Halberg, W

This patent describes an axial flow steam turbine. It comprises a rotor; a casing; an inlet nozzle ring disposed circumferentially about the rotor within the casing, having a first thermal coefficient of expansion, the inlet nozzle ring including radially spaced inner and outer shrouds; nozzle blocks, having a second thermal coefficient of expansion greater than the first coefficient of expansion of the inlet nozzle ring, and having radially inwardly and outwardly extending flanges; apertures formed through the front arcuate section of the nozzle ring; coaxial bores formed in the rear arcuate section thereof to form an end wall; and a locking pin, having a thermal coefficient of expansion greater than the first coefficient of expansion of the inlet nozzle ring, inserted into the bore in the rear arcuate section having a first end contacting the end wall, and a second end flush with the face of the rear arcuate section at ambient temperature.

• Assignee: Westinghouse Electric Corp., Pittsburgh, PA (US))
• Patent Number(s): US 5037269; A
• Application Number: PPN: US 7-470474
• OSTI ID: 5669042
• Country of Publication: United States
• Language: English

Related Subjects

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DESIGN
EQUIPMENT
EXPANSION
MACHINERY
NOZZLES
STEAM TURBINES
THERMAL EXPANSION
TURBINES
TURBOMACHINERY