US3635582A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Seals for hydraulic machines
Assignee: Library and Archives Canada
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Filing: 1970-03-16
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Granted: 1972-01-18
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Expires: 1990-03-16
Abstract
Abstract A pump, turbine or pump turbine having a runner with a crown and a band shroud is provided with annular cartridge seals which may be released from the machine housing, to permit disassembly of the machine even though the seals are seized to the runner. The seals each include an air separator and seal water provision, to permit efficient operation of the machine as an aerated machine having air admitted so as to exclude water from the annular zones external of an adjacent to the runner shroud outer surfaces.
Inventors
- 👤 Robert Stanley Sproule
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 04:22
CPC Classifications
F; F04; F04D; F04D29/00; F04D29/08; F04D29/16; F04D29/165; F04D29/167; F03; F03B; F03B11/00; F03B11/006; F03B15/00; F03B15/02; F03B15/04; F03B15/06; F03B15/18; F16; F16J; F16J15/00; F16J15/44; F16J15/447; F16J15/4476; Y; Y02; Y02E; Y02E10/00; Y02E10/20
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
236 words
A turbomachine selected from the group comprising turbines, pumps and pump-turbines having a shrouded runner rotatably mounted in a stationary casing structure with annular passage means for movement of working liquid therethrough; the runner having a crown shroud and a band shroud each having a highpressure edge adjacent the casing annular passage means, and blades extending between the shrouds; a crown shroud space and a band shroud space each located between the stationary casing structure and an annular outer surface portion of the respective shroud remote from the blades, at least one of said shrouds space having fluid seals bounding an aeration space for confining compressed air admitted to the space to displace working liquid therefrom, one said seals having spaced annular shoulder portions extending from the stationary casing structure inwardly towards the runner main axis to define an annular seal space adjacent the respective said shroud, an annular flinger ring extending outwardly from the shroud within the seal space in radial overlapping relation with the shoulder portions, a plurality of segmented seal portions forming an annulus axially secured by one said stationary shoulder portions, said one shoulder being in segmented portions, removably secured to the stationary casing structure and comprising means to permit axIal positioning of the flinger ring relative to the seal space and to permit withdrawal of said seal segmental portions, and liquid supply means to pass sealing liquid to the seal space.
Claim 2
Dependent Claim
236 words
A turbomachine selected from the group comprising turbines, pumps and pump-turbines having a shrouded runner rotatably mounted in a stationary casing structure with annular passage means for movement of working liquid therethrough; the runner having a crown shroud and a band shroud each having a highpressure edge adjacent the casing annular passage means, and blades extending between the shrouds; a crown shroud space and a band shroud space each located between the stationary casing structure and an annular outer surface portion of the respective shroud remote from the blades, at least one of said shrouds space having fluid seals bounding an aeration space for confining compressed air admitted to the space to displace working liquid therefrom, one said seals having spaced annular shoulder portions extending from the stationary casing structure inwardly towards the runner main axis to define an annular seal space adjacent the respective said shroud, an annular flinger ring extending outwardly from the shroud within the seal space in radial overlapping relation with the shoulder portions, a plurality of segmented seal portions forming an annulus axially secured by one said stationary shoulder portions, said one shoulder being in segmented portions, removably secured to the stationary casing structure and comprising means to permit axIal positioning of the flinger ring relative to the seal space and to permit withdrawal of said seal segmental portions, and liquid supply means to pass sealing liquid to the seal space.
Claim 3
Dependent Claim
61 words
The turbomachine as claimed in claim 1 wherein said flinger ring is spaced in axial facing relation with said removable shoulder portion to form a separation chamber, said ring having an annular lip extending axially into the separation chamber to provide a liquid circulation energizing surface to promote toroidal liquid flow and centrifugal separation of liquid and air in the chamber.
Claim 4
Dependent Claim
72 words
The turbomachine as claimed in claim 1, wherein said annular segmented seal portions form a radially inwardly extending shoulder portion to define in part the other said annular stationary shoulder portion, an annular seal water gallery recessed in an outer surface of said segmented seal means, and a plurality of spaced small apertures extending through the seal segments connecting the gallery with said seal space to provide passage for sealing liquid therethrough.
Claim 5
Dependent Claim
63 words
The turbomachine as claimed in claim 3 wherein said annular seal segmented portions being resilient and have sufficient peripheral and radial clearances with the supporting portions of said stationary casing to permit a resilient sealing relation with said shroud whereby radial displacement of the runner from its axis provides corresponding displacement of the adjacent seal portion, within the limits of the radial clearance.
Claim 6
Dependent Claim
57 words
The turbomachine as claimed in claim 1, wherein said flinger ring has a radially outer axially extending annular edge portion in close running relation with a surrounding peripheral surface formed of said segmented seal portions said axially extending annular edge portion having a plurality of annular grooves to define a labyrinth seal with said segmented seal portions.
Claim 7
Dependent Claim
63 words
The turbomachine as claimed in claim 1 wherein a portion of said shroud on the side of said flinger ring remote from said aeration space has a cylindrical surface in close running relation with a facing portion of said stationary casing structure, and a plurality of annular recesses therein providing leakage path flow chambers of enlarged cross section to assist in air/liquid separation.
Claim 8
Dependent Claim
90 words
The turbomachine as claimed in claim 1 wherein at least one said shroud is provided with an aeration seal adjacent the respective said shroud high-pressure edge, wherein a restricted leakage path extends between an annular portion of the stationary structure and an annular axially extending radially outer face portion of the shroud arranged in radially facing relation therewith, said leakage path extending axially in radially inwardly tapering relation towards the respective said shroud space, whereby the passage of air in reverse flow relation away from the aeration space is diminished.
Claim 9
Dependent Claim
42 words
The turbomachine as claimed in claim 7 wherein said annular face portion of said shroud is provided with a plurality of annular recesses to form local enlargements of said leakage path wherein toroidal fluid flow and separation of entrained air is promoted.
Claim 10
Dependent Claim
51 words
The turbomachine as claimed in claim 8 wherein an annular portion of said shroud within said shroud space located adjacent said shroud edge portion is provided with a radially outwardly tapering surface in flow energizing relation with seal liquid to promote toroidal flow and separation of air from said sealing liquid.
Claim 11
Dependent Claim
57 words
The turbomachine as claimed in claim 9 wherein a portion of said stationary structure within said aeration space and adjacent said high-pressure seal includes an annular shoulder extending axially towards the respective said shroud to deflect sealing liquid away from the aeration space to flow in air sealing relation substantially in the confines of said high-pressure seal.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-01-17 | 1975-07-19 | 1976-01-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-17 | 1979-07-19 | 1980-01-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-17 | 1983-07-19 | 1984-01-18 | $7700.00 | Window Closed / Lapsed |