US4803893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High speed rotor balance system
Assignee: RTX Corp
•
Filing: 1987-09-24
•
Granted: 1989-02-14
•
Expires: 2007-09-24
Abstract
Abstract A balance system for a high speed bladed rotor includes a collar (28) with an inwardly facing groove (30). Balance weights (36) are located in the groove with a cover plate (44) retaining the weights and covering the weights, groove and slots (32) in the collar. A compact arrangement is achieved with the weight close to the disk and windage losses are reduced.
Inventors
- 👤 Robert A. Bachinski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 13:16
CPC Classifications
F; F16; F16F; F16F15/00; F16F15/32; F16F15/34; F01; F01D; F01D5/00; F01D5/02; F01D5/027; F01D5/30; F01D5/3007; F01D5/3015; F16F15/322; Y; Y10; Y10S; Y10S416/00; Y10S416/50; Y10T; Y10T74/00; Y10T74/21; Y10T74/2121; Y10T74/2128
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
117 words
A compact balance system for a high speed gas turbine engine rotor comprising: a bladed disk; a closely spaced collar secured to said disk, said collar having an inwardly racing circumferential groove and a plurality of inwardly facing axial slots contiguous with, and axially outboard of said groove with respect to said disk; at least one balance weight located in said groove and one of said slots, and having an axially extending side; a circumferential cover place of L cross section secured within said collar including an axially extending leg covering the inwardly facing side of said groove, weight and slots and having a radially extending leg covering the axially extending side of said weight and slots.
Claim 2
Dependent Claim
117 words
A compact balance system for a high speed gas turbine engine rotor comprising: a bladed disk; a closely spaced collar secured to said disk, said collar having an inwardly racing circumferential groove and a plurality of inwardly facing axial slots contiguous with, and axially outboard of said groove with respect to said disk; at least one balance weight located in said groove and one of said slots, and having an axially extending side; a circumferential cover place of L cross section secured within said collar including an axially extending leg covering the inwardly facing side of said groove, weight and slots and having a radially extending leg covering the axially extending side of said weight and slots.
Claim 3
Dependent Claim
15 words
A balance system as in claim 1: said weight sized to substantially fill said groove.
Claim 4
Dependent Claim
47 words
A balance system as in claim 2: said weight having a majority of mass located in extending pin located in said slot, and an axially said groove, and an axially facing shoulder adjacent to said pin and bearing against said collar on each side of said slot.
References Cited (Backward Citations)
CA596159A
Cited
CA700996A
Cited
GB600498A
Cited
US2575237A
Cited
GB805371A
Cited
US3097824A
Cited
US3888601A
Cited
US3974700A
Cited
US3985465A
Cited
SU624130A1
Cited
DE2737040A1
Cited
US4220055A
Cited
US4294135A
Cited
US4457668A
Cited
US4480959A
Cited
US4480957A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-02-14 | 1992-08-15 | 1993-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-02-14 | 1996-08-15 | 1997-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-02-14 | 2000-08-15 | 2001-02-14 | $7700.00 | Window Closed / Lapsed |