EP0280246A1
Expired / Lapsed
EP
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Method of assembly of a blade arrangement for a steam turbine
Assignee: Westinghouse Electric Corp
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Filing: 1988-02-22
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Granted: —
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Expires: 2008-02-22
Abstract
Abstract A steam turbine of the type employing axial entry blades (12) is provided with a plurality of generally tangentially oriented grooves (34) in the rotor steeples. Resilient, deformable pins (32) are driven into the grooves (34) under the blade platforms (14) so as to urge the blade roots (16) radially outward.
Inventors
- 👤 Albert Joseph Partington
- 👤 Anthony Hodgson
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 08:59
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/30; F01D5/32; F01D5/326; F01D5/12; F01D5/22; F01D5/26; F01D5/3007; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
164 words
A blade mounting arrangement for a steam turbine (10) having a rotor (20) with a plurality of generally axially extending grooves (18) disposed therearound, a section of rotor between adjacent grooves (18) defining steeples (36), a plurality of blades (12), each blade (12) having a root (16) in registration with one of the grooves (18) and a platform (14) juxtaposed the steeples (36) that are adjacent the groove (18) with which the root (16) registers, and means (30) for locking each root (16) in the groove with which it registers to prevent axial movement of the blade (12), characterized in that wedge means (32) are disposed between each platform (14) and the steeples (36) with which the plaform (14) is juxtaposed, there being an interference fit between the wedge means (32) and the platform (14) so that the wedge means (32) urges the root (16) radially outward against edges of the groove (18) for preventing the root (16) from rocking in the groove (18).
Claim 2
Dependent Claim
164 words
A blade mounting arrangement for a steam turbine (10) having a rotor (20) with a plurality of generally axially extending grooves (18) disposed therearound, a section of rotor between adjacent grooves (18) defining steeples (36), a plurality of blades (12), each blade (12) having a root (16) in registration with one of the grooves (18) and a platform (14) juxtaposed the steeples (36) that are adjacent the groove (18) with which the root (16) registers, and means (30) for locking each root (16) in the groove with which it registers to prevent axial movement of the blade (12), characterized in that wedge means (32) are disposed between each platform (14) and the steeples (36) with which the plaform (14) is juxtaposed, there being an interference fit between the wedge means (32) and the platform (14) so that the wedge means (32) urges the root (16) radially outward against edges of the groove (18) for preventing the root (16) from rocking in the groove (18).
Claim 3
Dependent Claim
18 words
An arrangement according to claim 1, characterized in that the wedge means comprise a pair of pins (32).
Claim 4
Dependent Claim
34 words
An arrangement according to claim 2, characterized in that the pins (32) reside in generally tangentially extending slots (34) disposed in opposing ones of the steeples (36) with which each platform (14) is juxtaposed.
Claim 5
Dependent Claim
85 words
An arrangement according to claim 3, characterized in that two pair of pins (32) disposed between each platform (14) and the steeples (36) with which each platform (14) is juxtaposed, there being a first pair disposed adjacent a forward end of the platform (14) and a second pair disposed adjacent a rearward end of the platform (14), one of each pair being disposed on one side of the platform (14), the other of each pair being disposed on the other side of the platform (14).
Claim 6
Dependent Claim
20 words
An arrangement according to claim 2, 3, or 4, characterized in that the pins (32) have a generally semi-circular cross-section.
Claim 7
Dependent Claim
21 words
An arrangement according to claim 2, 3, or 4, characterized in that the pins (32) have a generally C-shaped cross section.
Claim 8
Dependent Claim
20 words
An arrangement according to claim 2, 3, or 4, characterized in that the pins (32) have a generally rectangular cross-section.
Claim 9
Dependent Claim
20 words
An arrangement according to claim 2, 3, or 4, characterized in that the pins (32) have a generally square cross-section.
Claim 10
Dependent Claim
20 words
An arrangement according to any of claims 2 to 8, characterized in that the pins (32) are resilient and deformable.
Claim 11
Dependent Claim
17 words
An arrangement according to claim 9, characterized in that the pins (32) are constructed of stainless steel.
Claim 12
Dependent Claim
21 words
An arrangement according to any of claims 2 to 10, characterized in that the pins (32) have a leading chamfered edge.
References Cited (Backward Citations)
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