US3868520A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Turbine-generator water-cooled rotor shaft liner restraint
Assignee: Westinghouse Electric Corp
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Filing: 1974-01-18
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Granted: 1975-02-25
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Expires: 1994-01-18
Abstract
Abstract A water-cooled rotor for a large turbine generator in which the rotor passages are protected against corrosion by liners of stainless steel or other corrosion resistant material. In order to reduce the stresses in the liners due to differential thermal expansion, the liners are prestressed in tension against a concentric outer tube.
Inventors
- 👤 Little P Curtis
- 👤 Paul R Heller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 14:02
CPC Classifications
H; H02; H02K; H02K9/00
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
186 words
A rotor for a dynamoelectric machine comprising: a body portion having windings thereon, said windings having passages for circulation of a fluid coolant therethrough; a shaft portion having a central axial bore extending therethrough, said shaft having a coolant collection chamber and a coolant discharge chamber thereon, said coolant discharge chamber being axially spaced from said coolant collection chamber, said shaft having a radial passage therein, said radial passage connecting said coolant collection chamber to said axial bore, said radial passage having a corrosion resistant liner extending therethrough, said shaft having a radial conduit therein, said radial conduit connecting said coolant discharge chamber to said axial bore, said radial conduit having a corrosion resistant liner extEnding therethrough; means for connecting said windings passages to said coolant collection chamber; a corrosion resistant bore liner extending through said axial bore, said corrosion resistant liner being closed at both ends thereof and connected to and communicating with said corrosion resistant liners extending through said radial passage and said radial conduit; a bracing member axially surrounding said bore liner; and, means for pre-stressing said bore liner against said bracing member.
Claim 2
Dependent Claim
186 words
A rotor for a dynamoelectric machine comprising: a body portion having windings thereon, said windings having passages for circulation of a fluid coolant therethrough; a shaft portion having a central axial bore extending therethrough, said shaft having a coolant collection chamber and a coolant discharge chamber thereon, said coolant discharge chamber being axially spaced from said coolant collection chamber, said shaft having a radial passage therein, said radial passage connecting said coolant collection chamber to said axial bore, said radial passage having a corrosion resistant liner extending therethrough, said shaft having a radial conduit therein, said radial conduit connecting said coolant discharge chamber to said axial bore, said radial conduit having a corrosion resistant liner extEnding therethrough; means for connecting said windings passages to said coolant collection chamber; a corrosion resistant bore liner extending through said axial bore, said corrosion resistant liner being closed at both ends thereof and connected to and communicating with said corrosion resistant liners extending through said radial passage and said radial conduit; a bracing member axially surrounding said bore liner; and, means for pre-stressing said bore liner against said bracing member.
Claim 3
Dependent Claim
45 words
The rotor of claim 1 wherein said bracing member surrounding said corrosion resistant bore liner has openings therein so as to permit said corrosion resistant liner of said radial passage and said corrosion resistant liner of said radial conduit to extend through said bracing member.
Claim 4
Dependent Claim
28 words
The rotor of claim 1 wherein an insulating member is disposed so as to separate said corrosion resistant liner extending through said axial bore from said bracing member.
Claim 5
Dependent Claim
123 words
The rotor of claim 1 wherein said means for pre-stressing said corrosion resistant liner extending through said bore against said bracing member comprises: an end plate member, a first bolt having threads thereon, said bolt passing through said end plate member and being threaded into said bore liner; a second bolt having threads thereon, said bolt being threaded into said end plate member and abutting said bracing member; and threading said first bolt into said bore liner with a first predetermined amount of torque exerting a tension force on said bore liner, threading with second bolt into said end plate member with a second predetermined amount of torque so as to abut said bracing member exerting a compression force on said bracing member.
Claim 6
Dependent Claim
15 words
The rotor of claim 1 wherein said bracing member is closed at one end thereof.
Claim 7
Dependent Claim
61 words
The rotor of claim 1 wherein said means for pre-stressing said corrosion resistant liner extending through said axial bore in tension against said bracing member comprises a bolt having threads thereon, said bolt being threaded into said liner extending through said bore, threading said bolt into said liner with a predetermined amount of torque exerting a tension force on said liner.
Claim 8
Dependent Claim
28 words
The rotor of claim 1, wherein said corrosion resistant liner extending through said axial bore has a slot disposed circumferentially about its external periphery adjacent one end thereof.
Claim 9
Dependent Claim
41 words
The rotor of claim 7, wherein said means for pre-stressing said corrosion resistant liner extending through said bore in tension against said bracing member comprises a key member disposed within said slot and against said bracing member, and a keeper member.
Claim 10
Dependent Claim
59 words
A rotor of claim 4, wherein a plurality of first bolts having threads therein are threaded into said bore liner, said first bolts being arranged in a circular pattern, and, a plurality of second bolts having threads thereon are threaded into said end plate member and abut said bracing member, said second bolts being arranged in a circular pattern.
Claim 11
Dependent Claim
29 words
The rotor of claim 6, wherein a plurality of bolts having threads thereon are threaded into said liner through said bore, said bolts being arranged in a circular pattern.
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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) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |