Abstract:
A turbine apparatus (10) has amain shaft (16), a first set of blades (12) mounted to the main shaft, a second set of blades (14), and a barrel (18) affixed to a periphery of the second set of blades. The barrel (18) is rotatably mounted independent of a rotation of the main shaft (16). The barrel (18) and the second set of blades (14) rotates in a direction opposite to the direction of rotation of the first set of blades (12) and the main shaft (16). A third set of blades (22) is mounted to the main shaft such that the second set of blades is interposed between the first and third sets of blades. An outer shell (20) extends over and an outer surface of the barrel such that the barrel is rotatable interior of the outer shell.
Abstract:
A gas turbine engine includes a shaft defining an axis of rotation. An outer rotor directly drives the shaft and includes an outer set of blades. An inner rotor has an inner set of blades interspersed with the outer set of blades. The inner rotor is configured to rotate in an opposite direction about the axis of rotation from the outer rotor. A gear system couples the inner rotor to the shaft and is configured to rotate the inner set of blades at a faster speed than the outer set of blades.
Abstract:
Provided is an integral cross-revolution axial flow turbine compressor used in a gas turbine engine. The compressor includes: a casing; a rotation shaft; rotation rotors disposed on the rotation shaft in a length direction to rotate along the rotation shaft, and each having blades and one projected side; reverse rotation means each having an inner side coupled to the projected side to rotate with the rotation rotor, and an outer side rotating in an opposite direction from of the rotation rotor and the inner side; and reverse rotation rotors disposed along the length direction of the rotation shaft alternatively with the rotation rotors, connected to the outer side of the reverse rotation means to rotate in an opposite direction from the rotation rotor by the reverse rotation means and each having a plurality of blades disposed around circumference thereof.
Abstract:
A gas turbine engine includes a shaft defining an axis of rotation. An outer rotor directly drives the shaft and includes an outer set of blades. An inner rotor has an inner set of blades interspersed with the outer set of blades. The inner rotor is configured to rotate in an opposite direction about the axis of rotation from the outer rotor. A gear system couples the inner rotor to the shaft and is configured to rotate the inner set of blades at a faster speed than the outer set of blades.
Abstract:
The invention relates to a turbine wheel arrangement for a gas turbine comprising two successive turbine wheels (18, 20) rotating in opposite directions, wherein the first turbine wheel (18) comprises flow channels (42) of a Laval cross-sectional shape, distributed over the circumference and having radially inner gas inlets (43) and radially further out gas outlets (45), in each case with a substantially tangential flow direction component, wherein the gas outlets (45) act on the second axially or radially acting turbine wheel (20) in the direction of flow. This has the effect that the thermal energy and compressive energy of the gas at the nozzle inlet is largely converted into flow energy at the outlet of the turbine stage. The rotational speeds of the two rotors coupled to the turbine wheels can be set as desired, allowing the operational states of the two systems to be optimally set without adjusting systems.
Abstract:
La présente invention se rapporte à un système d'hélices contrarotatives (30) pour turbomachine d'aéronef, comprenant : - une turbine libre de puissance (32); - une première hélice (7) et une seconde hélice (9) contrarotatives, la première étant située dans une direction donnée par rapport à la seconde, chacune comprenant un moyeu (48a, 48b), une virole extérieure (56a, 56b), ainsi que des bras de raccord (60a, 60b) reliant les deux; et - un carter (42) interposé entre la turbine libre (32) et les hélices, ces dernières étant agencées dans la direction donnée par rapport au carter et la turbine étant agencée dans la direction opposée par rapport à ce même carter, celui-ci présentant une extension de carter (46) dans la direction donnée, supportant en rotation le moyeu (48b) de l'hélice (9). Selon l'invention, les bras de raccord (60b) s'étendent dans ladite direction opposée en allant radialement vers l'extérieur.
Abstract:
A radially outward flow turbine having a rotor (23) with nozzles (19) which extend from an inner inlet passage (16) to the rotor periphery with a substantially constant pressure drop per unit length of nozzle, with a first oder surface continuity along the surface of each nozzle and with a nozzle profile which allows two-phase flow without substantial lateral acceleration according to formula (I). The turbine is also illustrated with a second set of nozzles (29, 41) outwardly of the first set included in either the rotor or in a second contrarotating rotor (34). The rotor in either case vents steam to multiply steam turbine stages (32, 44) while the second set of nozzles receives saturated vapor. The steam turbine stage may be defined by either the first rotor and a stator or the first rotor and a contrarotating rotor.
Abstract:
A power transmission system (210) for a turbine (200) or a compressor has a housing (220), a first shaft rotatably mounted so as to be rotatable in one direction in the housing, a barrel (202) rotatably mounted so as to be rotatable in a direction opposite to that of the first shaft (208) within the housing, a first plurality of blades (206) affixed to the first shaft and extending radially outwardly therefrom, and a second plurality of blades (206) affixed to the barrel and extending inwardly therefrom. Each blade of the second plurality of blades is interposed between adjacent blades of the first plurality of blades. A second shaft (260) is mounted exterior of the housing so as to drive the barrel in rotation.
Abstract:
A gas turbine engine has a fan rotor, a first compressor rotor and a second compressor rotor. The second compressor rotor compresses air to a higher pressure than the first compressor rotor. A first turbine rotor drives the second compressor rotor and a second turbine rotor. The second turbine drives the compressor rotor. A fan drive turbine is positioned downstream of the second turbine rotor. The fan drive turbine drives the fan through a gear reduction. The first compressor rotor and second turbine rotor rotate as an intermediate speed spool. The second compressor rotor and first turbine rotor together as a high speed spool. The high speed spool rotating in the same direction as the intermediate speed spool. The fan drive turbine rotates in an opposed direction as the intermediate speed spool.