EP0398377A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Rotary hydraulic machine
Assignee: Vickers Inc
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Filing: 1990-05-18
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Granted: —
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Expires: 2010-05-18
Abstract
Abstract A rotary hydraulic machine having particular utility as a fuel pump for aircraft turbine engines that combines the desirable features of vane-type and centrifugal-type machines of similar character -ie, high pressure positive displacement at low speed combined with improved reliability, package size and weight. This is accomplished, in accordances with a presently preferred embodiment of the invention, by providing a combined vane- and centrifugal-type pump that is configured to function as a pressure-compensated single-lobe vane pump for engine starting, and as a centrifugal pump at normal operating speed.
Inventors
- 👤 Lowell D. Hansen
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-10-30 10:07
CPC Classifications
F; F04; F04C; F04C14/00; F04C14/18; F04C14/22; F04C14/223; F02; F02M; F02M37/00; F02M37/04; F02M37/18; F04C14/02; F04D; F04D13/00; F04D13/12; F04D29/00; F04D29/18; F04D29/22; F04D29/2238; F04D29/2255
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
232 words
A combined centrifugal and vane-type rotary hydraulic machine comprising: a housing (12), a rotor (22) mounted for rotation within said housing (12), and having a plurality of radially extending peripheral slots (46) and a plurality of internal passages (60) extending radially between said slots form an open outer end at a periphery of said rotor to an inner end (62), a plurality of vanes (48) individually slidably mounted in said slots (46), an annular track ring (78) mounted within said housing (12), said track ring (78) having a radially inner surface surrounding said rotor (22) and forming an (annular or crescent) fluid cavity between said surface and said rotor, and a plurality of passages (84) extending radially through said ring (78), fluid inlet means (124) in said housing (12) for feeding inlet fluid to said inner ends (62) of said rotor passages (60), fluid outlet means (112, 116, 118, 120) including an outlet cavity (112) in said housing (12) radially external to said passages (84) in said ring (78), means (50, 52, 53) urging said vanes (48) radially outwardly into sliding engagement with said ring (78), and means (86, 102) coupled to said ring (78) and responsive to fluid pressure at one (118) of said inlet and outlet means for adjustably positioning said ring (78) within said housing (12), and thereby controlling displacement of said machine, as a function of fluid pressure.
Claim 2
Dependent Claim
232 words
A combined centrifugal and vane-type rotary hydraulic machine comprising: a housing (12), a rotor (22) mounted for rotation within said housing (12), and having a plurality of radially extending peripheral slots (46) and a plurality of internal passages (60) extending radially between said slots form an open outer end at a periphery of said rotor to an inner end (62), a plurality of vanes (48) individually slidably mounted in said slots (46), an annular track ring (78) mounted within said housing (12), said track ring (78) having a radially inner surface surrounding said rotor (22) and forming an (annular or crescent) fluid cavity between said surface and said rotor, and a plurality of passages (84) extending radially through said ring (78), fluid inlet means (124) in said housing (12) for feeding inlet fluid to said inner ends (62) of said rotor passages (60), fluid outlet means (112, 116, 118, 120) including an outlet cavity (112) in said housing (12) radially external to said passages (84) in said ring (78), means (50, 52, 53) urging said vanes (48) radially outwardly into sliding engagement with said ring (78), and means (86, 102) coupled to said ring (78) and responsive to fluid pressure at one (118) of said inlet and outlet means for adjustably positioning said ring (78) within said housing (12), and thereby controlling displacement of said machine, as a function of fluid pressure.
Claim 3
Dependent Claim
66 words
The machine set forth in claim 1 wherein said ring coupled means (86, 102) comprises a spring actuator (86) including a first piston (92) radially slidably mounted in said housing (12) and coupled to said track ring (78), and a coil spring (98) having a radially oriented axis and captured in compression between a spring seat (96) in said housing (12) and said first piston (92).
Claim 4
Dependent Claim
49 words
The machine set forth in claim 1 or 2 wherein said ring coupled means (86, 102) comprises a hydraulic fluid actuator (102) including a second piston (108) radially slidably mounted in said housing (12) and coupled to said track ring (78) in diametric opposition to said first piston (92).
Claim 5
Dependent Claim
51 words
The machine set forth in any of claims 1 to 4 wherein said housing (12) includes opposed backup plate means (24, 28) including port means (42, 44) in facing engagement with said rotor (22), said ring (78) being movably positioned between said backup plate means (24, 28) surrounding said rotor (22).
Claim 6
Dependent Claim
56 words
The machine set forth in any of claims 1 to 4 wherein said vane-urging means (50, 52, 53) comprises a fluid chamber (50) at the radially inner end of each said slot (46) beneath the associated said vane (48), and means (52, 53) in said port means (42, 44) for feeding fluid to said chambers (50).
Claim 7
Dependent Claim
26 words
The machine set forth in any of claims 1 to 5 wherein said passages (84) in said ring (78) are angulated radially of said rotor (22).
Claim 8
Dependent Claim
35 words
The machine set forth in any of claims 1 to 6 wherein said slots (46) and said passages (60) in said rotor (22) alternate with each other circumferentially of said rotor (22) at uniform spacing.
Claim 9
Dependent Claim
54 words
The machine set forth in any of claims 1 to 7 comprising a pump having a shaft (20) coupled to said rotor (22) and extending from said housing (12) through one (28) of said backup means, and a fluid inlet (124) coaxial with said shaft (20) in the other (24) of said backup means.
Claim 10
Dependent Claim
31 words
The machine set forth in claim 8 wherein said rotor (22) includes inlet passages (62) for feeding fluid from said inlet (124) to said inner ends of said radial passages (60).
Claim 11
Dependent Claim
32 words
The machine set forth in claim 8 or 9 further comprising a spiral inducer (126) coupled to said shaft (20) and positioned in said inlet (124) for pressurizing fluid at said inlet.
Claim 12
Dependent Claim
50 words
The machine set forth in any of claims 3 to 10 wherein said fluid actuator (102) further includes a radial passage having said second piston (108) slidable therewithin, and means received in said passage to form a seat (111) for said second piston (108) to limit radially outward motion thereof.
Claim 13
Dependent Claim
25 words
The machine set forth in claim 11 wherein said fluid actuator (102) further includes means (106) for adjustably positioning said seat (111) within said passage.
Claim 14
Dependent Claim
65 words
The machine set forth in claim 12 wherein said positioning means (106) comprises a hollow cup-shaped sleeve (106) adjustably threadably received in a passage (105), and a side port (120) in said sleeve (106) for receiving fluid from said one passage (116), said second piston (108) being slidably carried by said sleeve (106) and said seat (111) being internally integrally formed in said sleeve (106).
Claim 15
Dependent Claim
43 words
The machine set forth in any of claims 1 to 13 wherein said internal passages (60) of said rotor (22) cooperate with passage means (64, 65) in said housing (12) for feeding inlet fluid to at least some of said inner ends (62).
Claim 16
Dependent Claim
25 words
The machine set forth in claim 14 wherein said rotor (22) further includes internal passages means (74, 76) interconnecting all of said internal ends (62).
Claim 17
Dependent Claim
23 words
The machine set forth in any of claims 1 to 15 wherein said passages (84) in said ring (78) are radially angulated passages.
References Cited (Backward Citations)
No citation records indexed.
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