Patent US3627448A successfully refreshed from Google Patents.
US3627448A
Expired / Lapsed
US
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Locking arrangement for side-entry blades
Assignee: Westinghouse Electric Corp
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Filing: 1969-12-31
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Granted: 1971-12-14
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Expires: 1989-12-31
Abstract
Abstract An arrangement is provided for installing and subsequent locking of side-entry blades in a turbine rotor disc. Heretofore, the placement of the last blade in a circular row of turbine blades has required twisting, bending and distorting of the last and adjacent blade at assembly because of interference between adjacent blades. This jeopardized their reliability in service. The present arrangement permits radial entry of the last blade into the rotor or disc without distortion of any of the blades.
Inventors
- 👤 Donald R Rupp
- 👤 James A Pratt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:47
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/30; F01D5/3007
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
159 words
In a locking arrangement for a circular row of turbine rotor side-entry blades, said rotor having a disc with a plurality of axially extending channels circumferentially spaced around its periphery, each blade having a root portion and an airfoil portion and a platform portion joining the root portion to the airfoil portion, means on the root portion of each blade cooperating with means on a channel for securing the blade in the channel, the lateral width of the platform portion of one of the blades being less than the lateral width of the platform portions of the other blades to permit said one blade to be inserted radially between two adjacent blades, a locking member extending axially between said one blade and an adjacent blade to secure said one blade in its operation position, and a radially extending projection on the locking member for closing the space between the platform portions of said one blade and an adjacent blade.
Claim 2
Dependent Claim
159 words
In a locking arrangement for a circular row of turbine rotor side-entry blades, said rotor having a disc with a plurality of axially extending channels circumferentially spaced around its periphery, each blade having a root portion and an airfoil portion and a platform portion joining the root portion to the airfoil portion, means on the root portion of each blade cooperating with means on a channel for securing the blade in the channel, the lateral width of the platform portion of one of the blades being less than the lateral width of the platform portions of the other blades to permit said one blade to be inserted radially between two adjacent blades, a locking member extending axially between said one blade and an adjacent blade to secure said one blade in its operation position, and a radially extending projection on the locking member for closing the space between the platform portions of said one blade and an adjacent blade.
Claim 3
Dependent Claim
21 words
The locking arrangement defined in claim 1, wherein: said rotor disc has an axially extending subchannel for receiving said locking member.
Claim 4
Dependent Claim
27 words
The locking arrangement defined in claim 2, including: means on the locking member cooperating with means on the subchannel for securing the locking member in the subchannel.
Claim 5
Dependent Claim
23 words
The locking arrangement defined in claim 3, wherein: the locking member securing means includes intermeshing serrations on the locking member and the subchannel.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-12-13 | 1975-06-14 | 1975-12-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-13 | 1979-06-14 | 1979-12-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-13 | 1983-06-14 | 1983-12-14 | $7700.00 | Window Closed / Lapsed |