US3786289A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rotating machines having end thrust cushioning arrangements
Assignee: General Electric Co
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Filing: 1972-06-19
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Granted: 1974-01-15
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Expires: 1992-06-19
Abstract
Abstract Electric motor with stator and rotor assemblies and single member end thrust transmitting and cushioning system. The single member of each system limits rotor end play and is illustrated as an undulated disc or wavy washer. The thrust member includes first and second pluralities of spaced apart bearing surfaces or pads interconnected by ramps or beam elements. Angularly alternating ones of the pads lie in axially spaced apart parallel planes and are flexibly movable toward one another when compressed. Thrust member is formed of thermoresponsive (i.e., thermosetting or thermoplastic) material and juncture of ramps and pads promotes desirable lubricating action by lubricant flowing from reservoir, along sleeve bearing to stationary thrust bearing surface.
Inventors
- 👤 J Baclawski
- 👤 W Hunt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 18:44
CPC Classifications
H; H02; H02K; H02K5/00; H02K5/04; H02K5/16; H02K5/167; H02K5/1672; F; F16; F16C; F16C17/00; F16C17/04; F16C17/12; F16C17/18; F16C27/00; F16C27/08; F16C2380/00; F16C2380/26
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
224 words
A dynamoelectric machine having a stator assembly, a rotor assembly including a shaft and end thrust transmitting means; said stator assembly including bearing means arranged to rotatably support the shaft for rotation relative to the stator; and thrust cushion means, interposed between the end thrust transmitting means and a thrust resisting portion of the stator assembly, for transmitting thrust forces from the rotor assembly to the thrust resisting portion of the stator assembly and for cushioning sudden axial movement of the rotor assembly; said thrust cushion means comprising a one-piece undulated synthetic member formed by the application of pressure thereto, said undulated member being arranged to flex in response to the transmission of thrust forces and being assembled with at least a slip-fit with at least a part of the rotor assembly and being held in a position to transmit thrust between the end thrust transmitting means and the thrust resisting portion of the stator assembly; said one-piece undulated member having intersecting surface portions that establish a plurality of spaced apart relatively planar bearing surface portions and a plurality of cavitation regions with at least one cavitation region adjacent to each of said bearing surface portions, with said cavitation regions promoting a film of lubricating material between the bearing surface portions of the thrust cushion and the thrust resisting portion of the stator assembly.
Claim 2
Dependent Claim
224 words
A dynamoelectric machine having a stator assembly, a rotor assembly including a shaft and end thrust transmitting means; said stator assembly including bearing means arranged to rotatably support the shaft for rotation relative to the stator; and thrust cushion means, interposed between the end thrust transmitting means and a thrust resisting portion of the stator assembly, for transmitting thrust forces from the rotor assembly to the thrust resisting portion of the stator assembly and for cushioning sudden axial movement of the rotor assembly; said thrust cushion means comprising a one-piece undulated synthetic member formed by the application of pressure thereto, said undulated member being arranged to flex in response to the transmission of thrust forces and being assembled with at least a slip-fit with at least a part of the rotor assembly and being held in a position to transmit thrust between the end thrust transmitting means and the thrust resisting portion of the stator assembly; said one-piece undulated member having intersecting surface portions that establish a plurality of spaced apart relatively planar bearing surface portions and a plurality of cavitation regions with at least one cavitation region adjacent to each of said bearing surface portions, with said cavitation regions promoting a film of lubricating material between the bearing surface portions of the thrust cushion and the thrust resisting portion of the stator assembly.
Claim 3
Dependent Claim
172 words
In a dynamoelectric machine having a stator assembly that includes bearing means, a rotor assembly including a shaft and thrust transmitting means with the shaft being supported by the bearing means for rotation about an axis thereof, and at least one thrust member interposed between the thrust transmitting means and a thrust resisting portion of the stator assembly, said thrust member comprising a synthetic material undulated disc having a plurality of angularly spaced apart bearing surfaces each having at least a portion thereof disposed in a first plane generally normal to the axis of the shaft, and a second plurality of angularly spaced apart bearing surfaces each having at least a portion thereof disposed in a second plane spaced axially along the shaft from the first plane, said undulated disc including a plurality of cavitation regions with at least one cavitation region adjacent to each of said bearing surfaces, said undulated disc being yieldable in response to the application of thrust forces thereto so as to resiliently accommodate changes in thrust loading.
Claim 4
Dependent Claim
172 words
In a dynamoelectric machine having a stator assembly that includes bearing means, a rotor assembly including a shaft and thrust transmitting means with the shaft being supported by the bearing means for rotation about an axis thereof, and at least one thrust member interposed between the thrust transmitting means and a thrust resisting portion of the stator assembly, said thrust member comprising a synthetic material undulated disc having a plurality of angularly spaced apart bearing surfaces each having at least a portion thereof disposed in a first plane generally normal to the axis of the shaft, and a second plurality of angularly spaced apart bearing surfaces each having at least a portion thereof disposed in a second plane spaced axially along the shaft from the first plane, said undulated disc including a plurality of cavitation regions with at least one cavitation region adjacent to each of said bearing surfaces, said undulated disc being yieldable in response to the application of thrust forces thereto so as to resiliently accommodate changes in thrust loading.
Claim 5
Dependent Claim
21 words
The structure of claim 2 wherein angularly adjacent ones of the bearing surfaces are interconnected by a resiliently deformable ramp element.
Claim 6
Dependent Claim
156 words
A dynamoelectric machine having a rotor assembly and stator assembly with the rotor assembly supported for rotation relative to the stator assembly, said dynamoelectric machine further comprising a lubricant storage system, a synthetic material generally disc-shaped member having oppositely facing axially and angularly displaced relatively movable bearing surfaces; angularly adjacent ones of said oppositely facing bearing surfaces being interconnected by a beam element whereby said oppositely facing bearing surfaces may be resiliently urged axially toward one another in response to axial movement of the rotor relative to the stator so as to transmit axially directed forces to the stator assembly from the rotor assembly and so as to cushion the rotor assembly as movement of the rotor assembly axially relative to the stator assembly is arrested; said member including at least one cavitation region adjacent to each bEaring surface for promoting a film of lubricating material along the bearing surfaces during operation of the dynamoelectric machine.
Claim 7
Dependent Claim
156 words
A dynamoelectric machine having a rotor assembly and stator assembly with the rotor assembly supported for rotation relative to the stator assembly, said dynamoelectric machine further comprising a lubricant storage system, a synthetic material generally disc-shaped member having oppositely facing axially and angularly displaced relatively movable bearing surfaces; angularly adjacent ones of said oppositely facing bearing surfaces being interconnected by a beam element whereby said oppositely facing bearing surfaces may be resiliently urged axially toward one another in response to axial movement of the rotor relative to the stator so as to transmit axially directed forces to the stator assembly from the rotor assembly and so as to cushion the rotor assembly as movement of the rotor assembly axially relative to the stator assembly is arrested; said member including at least one cavitation region adjacent to each bEaring surface for promoting a film of lubricating material along the bearing surfaces during operation of the dynamoelectric machine.
Claim 8
Dependent Claim
32 words
The structure of claim 4 wherein each beam element coacts with a stationary thrust surface to define a cavitation region and to establish a hydrodynamic oil film along the stationary thrust surface.
Claim 9
Dependent Claim
136 words
A thrust member for use in an electric motor having rotatable parts, said member comprising a deformable synthetic material cushion having a plurality of angularly spaced apart and oppositely facing bearing surfaces, angularly adjacent and oppositely facing ones of said bearing surfaces being joined together by ramp elements and resiliently movable toward one another upon the application of compressive forces thereto, said oppositely facing bearing surfaces being alternately located about a shaft accommodating aperture and establishing, with the ramp elements, a flexible and circumferentially undulated thrust transmitting structure; said oppositely facing bearing surfaces being faces of bearing pads, and angularly adjacent ones of the bearing pads being interconnected by a ramp element; said cushion including at least one cavitation region adjacent to each bearing pad for promoting lubrication of the pad faces within the electric motor.
Claim 10
Dependent Claim
136 words
A thrust member for use in an electric motor having rotatable parts, said member comprising a deformable synthetic material cushion having a plurality of angularly spaced apart and oppositely facing bearing surfaces, angularly adjacent and oppositely facing ones of said bearing surfaces being joined together by ramp elements and resiliently movable toward one another upon the application of compressive forces thereto, said oppositely facing bearing surfaces being alternately located about a shaft accommodating aperture and establishing, with the ramp elements, a flexible and circumferentially undulated thrust transmitting structure; said oppositely facing bearing surfaces being faces of bearing pads, and angularly adjacent ones of the bearing pads being interconnected by a ramp element; said cushion including at least one cavitation region adjacent to each bearing pad for promoting lubrication of the pad faces within the electric motor.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-01-14 | 1977-07-16 | 1978-01-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-01-14 | 1981-07-16 | 1982-01-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-01-14 | 1985-07-16 | 1986-01-15 | $7700.00 | Window Closed / Lapsed |