Retention system and method for the blades of a rotary machine
Abstract
A retention system and method for the blades of a rotary machine for preventing forward or aft axial movement of the rotor blades includes a circumferential hub slot formed about a circumference of the machine hub. The rotor blades have machined therein a blade retention slot which is aligned with the circumferential hub slot when the blades are received in correspondingly shaped openings in the hub. At least one ring segment is secured in the blade retention slots and the circumferential hub slot to retain the blades from axial movement. A key assembly is used to secure the ring segments in the aligned slots via a hook portion receiving the ring segments and a threaded portion that is driven radially outwardly by a nut. A cap may be provided to provide a redundant back-up load path for the centrifugal loads on the key. Alternatively, the key assembly may be formed in the blade dovetail.
- Inventors:
-
- Cincinnati, OH
- Hamilton, OH
- Piedmont, SC
- Issue Date:
- Research Org.:
- General Electric Co., Schenectady, NY (United States)
- OSTI Identifier:
- 874480
- Patent Number(s):
- 6398500
- Assignee:
- General Electric Company (Schenectady, NY)
- Patent Classifications (CPCs):
-
F - MECHANICAL ENGINEERING F01 - MACHINES OR ENGINES IN GENERAL F01D - NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- DOE Contract Number:
- FC21-95MC31176
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- retention; method; blades; rotary; machine; preventing; forward; axial; movement; rotor; circumferential; hub; slot; formed; circumference; machined; blade; aligned; received; correspondingly; shaped; openings; segment; secured; slots; retain; key; assembly; secure; segments; via; hook; portion; receiving; threaded; driven; radially; outwardly; nut; cap; provided; provide; redundant; back-up; load; path; centrifugal; loads; alternatively; dovetail; axial movement; rotor blade; /416/29/
Citation Formats
Pedersen, Poul D, Glynn, Christopher C, and Walker, Roger C. Retention system and method for the blades of a rotary machine. United States: N. p., 2002.
Web.
Pedersen, Poul D, Glynn, Christopher C, & Walker, Roger C. Retention system and method for the blades of a rotary machine. United States.
Pedersen, Poul D, Glynn, Christopher C, and Walker, Roger C. Tue .
"Retention system and method for the blades of a rotary machine". United States. https://www.osti.gov/servlets/purl/874480.
@article{osti_874480,
title = {Retention system and method for the blades of a rotary machine},
author = {Pedersen, Poul D and Glynn, Christopher C and Walker, Roger C},
abstractNote = {A retention system and method for the blades of a rotary machine for preventing forward or aft axial movement of the rotor blades includes a circumferential hub slot formed about a circumference of the machine hub. The rotor blades have machined therein a blade retention slot which is aligned with the circumferential hub slot when the blades are received in correspondingly shaped openings in the hub. At least one ring segment is secured in the blade retention slots and the circumferential hub slot to retain the blades from axial movement. A key assembly is used to secure the ring segments in the aligned slots via a hook portion receiving the ring segments and a threaded portion that is driven radially outwardly by a nut. A cap may be provided to provide a redundant back-up load path for the centrifugal loads on the key. Alternatively, the key assembly may be formed in the blade dovetail.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}