US4477226A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Balance for rotating member
Assignee: General Electric Co
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Filing: 1983-05-09
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Granted: 1984-10-16
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Expires: 2003-05-09
Abstract
Abstract Dovetail spacers containing slots enable final balancing of a turbine or compressor rotor or wheel without employing grooves or drilling holes in the wheel itself. The spacers are installed in the normal fashion and, when final balancing is performed, appropriate weights are inserted into the slots in selected ones of the spacers. Fine tuning can be performed by drilling or grinding the weights. In one embodiment, the spacer is provided with a radial hole which joins an axial hole. After the turbine or compressor rotor is assembled, additional counterweight material can be added through the radial hole and then be held in place by suitable means such as a setscrew. In this embodiment, weights of suitable material can also be removed as necessary.
Inventors
- 👤 Diether E. Carreno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:11
CPC Classifications
F; F01; F01D; F01D5/00; F01D5/02; F01D5/027; F16; F16F; F16F15/00; F16F15/32; F01D5/30; F01D5/3007; F01D5/32; F01D5/326; Y; Y10; Y10S; Y10S416/00; Y10S416/50
Claims Analysis
Total Claims: 24
Claim 1
Independent Claim
133 words
Apparatus for balancing a rotating component of the type having a wheel and a plurality of blade members extending from said wheel, each of said blade members including a dovetail fittable into a dovetail slot in a perimeter of said wheel for support of said blade member, comprising: said dovetail slot having a length exceeding a length of said dovetail; at least one spacer fittable into said dovetail slot abutting said dovetail and effective to retain said dovetail in a predetermind longitudinal position in said dovetail slot; a balance slot in said spacer; said balance slot being disposed to retain sufficient strength in said spacer to permit said spacer to resist inertial forces thereon; a balance weight fittable into said balance slot; and means for retaining said balance weight in said balance slot.
Claim 2
Dependent Claim
133 words
Apparatus for balancing a rotating component of the type having a wheel and a plurality of blade members extending from said wheel, each of said blade members including a dovetail fittable into a dovetail slot in a perimeter of said wheel for support of said blade member, comprising: said dovetail slot having a length exceeding a length of said dovetail; at least one spacer fittable into said dovetail slot abutting said dovetail and effective to retain said dovetail in a predetermind longitudinal position in said dovetail slot; a balance slot in said spacer; said balance slot being disposed to retain sufficient strength in said spacer to permit said spacer to resist inertial forces thereon; a balance weight fittable into said balance slot; and means for retaining said balance weight in said balance slot.
Claim 3
Dependent Claim
29 words
Apparatus according to claim 1 wherein said balance slot is axially disposed and includes a U-shaped cross section, an opening of said U-shaped cross section being disposed radially inward.
Claim 4
Dependent Claim
31 words
Apparatus according to claim 2 wherein said balance weight includes a cylindrical cross section, said cylindrical cross section and a curved portion of said U-shaped cross section having substantially equal radii.
Claim 5
Dependent Claim
22 words
Apparatus according to claim 1 wherein said means for retaining includes a staking at contiguous portions of said spacer and said wheel.
Claim 6
Dependent Claim
23 words
Apparatus according to claim 1 wherein said balance slot is axially disposed in said spacer and passes through opposed ends of said spacer.
Claim 7
Dependent Claim
22 words
Apparatus according to claim 1 wherein said means for retaining includes abutment of an end of said balance slot with a surface.
Claim 8
Dependent Claim
13 words
Apparatus according to claim 1 wherein said means for retaining includes a setscrew.
Claim 9
Dependent Claim
14 words
Apparatus according to claim 7 wherein said setscrew is radially disposed in said spacer.
Claim 10
Dependent Claim
59 words
Apparatus according to claim 1 further comprising a radial hole from a radially outward surface of said spacer communicating with said balance slot, said balance weight being fittable through said radial hole into said balance slot, said means for retaining including a setscrew effective for closing said radial hole whereby said balance weight is retained in said balance slot.
Claim 11
Dependent Claim
33 words
Apparatus according to claim 9 wherein said balance weight includes a selectable plurality of weights fittable within said balance slot, a variable number of said selectable plurality being employable for different balance conditions.
Claim 12
Dependent Claim
10 words
Apparatus according to claim 10 wherein said weights are balls.
Claim 13
Dependent Claim
12 words
Apparatus according to claim 9 wherein said balance weight includes granular material.
Claim 14
Dependent Claim
20 words
Apparatus according to claim 9 wherein said balance weight includes a meltable material solidified in place in said balance slot.
Claim 15
Dependent Claim
156 words
A rotating component comprising: a rotatable wheel; a plurality of dovetail slots in a perimeter of said wheel; a plurality of blade members; each of said blade members including a dovetail fittable into one of said dovetail slots for support of said blade member; a length of said dovetail slot exceeding a length of said dovetail; at least one spacer fittable into said dovetail slot abutting said dovetail and effective to retain said dovetail in a predetermined position in said dovetail slot; a balance slot axially disposed in a radially inward surface of said spacer; said balance slot having a U-shaped cross section with an opening of said U-shaped cross section facing radially inward; a cylindrical balance weight fittable into said balance slot with a radius of said balance weight being substantially equal to a radius of a closed end of said U-shaped cross section; and means for retaining said balance weight in said balance slot.
Claim 16
Dependent Claim
156 words
A rotating component comprising: a rotatable wheel; a plurality of dovetail slots in a perimeter of said wheel; a plurality of blade members; each of said blade members including a dovetail fittable into one of said dovetail slots for support of said blade member; a length of said dovetail slot exceeding a length of said dovetail; at least one spacer fittable into said dovetail slot abutting said dovetail and effective to retain said dovetail in a predetermined position in said dovetail slot; a balance slot axially disposed in a radially inward surface of said spacer; said balance slot having a U-shaped cross section with an opening of said U-shaped cross section facing radially inward; a cylindrical balance weight fittable into said balance slot with a radius of said balance weight being substantially equal to a radius of a closed end of said U-shaped cross section; and means for retaining said balance weight in said balance slot.
Claim 17
Dependent Claim
18 words
A rotating component according to claim 14 further comprising means for adjusting a weight of said balance weight.
Claim 18
Dependent Claim
27 words
A rotating component according to claim 15 wherein said means for adjusting a weight includes means for permitting drilling of a trimming hole in said balance weight.
Claim 19
Dependent Claim
124 words
A rotating component comprising; a rotatable wheel; a plurality of dovetail slots in a perimeter of said wheel; a plurality of blade members; each of said blade members including a dovetail fittable into one of said dovetail slots for support of said blade member; a length of said dovetail slot exceeding a length of said dovetail; at least one spacer fittable into said dovetail slot abutting said dovetail and effective to retain said dovetail in a predetermined position in said dovetail slot; a balance slot disposed in said spacer; a radial hole from a radially outward surface of said spacer communicating with said balance slot; and said balance weight being fittable through said radial hole thereby retaining said balance weight in said balance slot.
Claim 20
Dependent Claim
124 words
A rotating component comprising; a rotatable wheel; a plurality of dovetail slots in a perimeter of said wheel; a plurality of blade members; each of said blade members including a dovetail fittable into one of said dovetail slots for support of said blade member; a length of said dovetail slot exceeding a length of said dovetail; at least one spacer fittable into said dovetail slot abutting said dovetail and effective to retain said dovetail in a predetermined position in said dovetail slot; a balance slot disposed in said spacer; a radial hole from a radially outward surface of said spacer communicating with said balance slot; and said balance weight being fittable through said radial hole thereby retaining said balance weight in said balance slot.
Claim 21
Dependent Claim
33 words
Apparatus according to claim 17 wherein said balance weight includes a selectable plurality of weights fittable within said balance slot, a variable number of said selectable plurality being employable for different balance conditions.
Claim 22
Dependent Claim
10 words
Apparatus according to claim 18 wherein said weights are balls.
Claim 23
Dependent Claim
12 words
Apparatus according to claim 19 wherein said balance weight includes granular material.
Claim 24
Dependent Claim
20 words
Apparatus according to claim 19 wherein said balance weight includes a meltable material solidified in place in said balance slot.
References Cited (Backward Citations)
US1360936A
Cited
US2613058A
Cited
SU129431A1
Cited
US2843356A
Cited
GB805371A
Cited
US3181835A
Cited
US3297302A
Cited
US3395891A
Cited
US3632228A
Cited
US3736811A
Cited
US3888601A
Cited
US3986779A
Cited
JPS57408A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-10-16 | 1988-04-16 | 1988-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-10-16 | 1992-04-16 | 1992-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-10-16 | 1996-04-16 | 1996-10-16 | $7700.00 | Window Closed / Lapsed |