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 and the fan drive turbine configured to rotate in the same first direction. The intermediate speed spool rotates in an opposed, second direction.
Abstract:
The invention relates to a turbine for hydraulic power generation comprising two bladed wheels (11, 12, 31, 32) successively arranged in a turbine tube section (10, 21) as a fore wheel (11, 31) and an after wheel (12, 32) with respect to the water flow direction (23) along a common rotation axis (30) extending in the water flow direction (23), the wheels (11, 12, 31, 32) being configured to rotate in opposite directions driven by the water flow, and to a corresponding hydroelectric power plant. In order to improve the turbine characteristics for hydraulic power generation, in particular in view of low head power generation, the invention suggests that a first gear (46) and a second gear (47) are arranged along the rotation axis (30), each connected to a wheel (11, 12, 31, 32) and mutually connected via an engagement gearing (48) such that the fore wheel (11, 31) and the after wheel (12, 32) are coupled to each other with respect to their rotation speed, the engagement gearing (48) being connectable to a power generator.
Abstract:
Turbomachine à hélices non carénées amont et aval contrarotatives (12, 14) comprenant une turbine de puissance montée axialement entre les deux hélices (12, 14) et qui comprend un rotor externe (56) solidaire en rotation de l'hélice amont (12) et un rotor interne (54) entraînant en rotation un arbre d'entrée (62) d'un réducteur à engrenages (52), celui-ci comprenant un arbre de sortie (64) entraînant en rotation le rotor (56) de l'hélice amont (12) et un arbre de sortie (66) entraînant en rotation l'hélice aval (14).
Abstract:
Roue aubagée à calages variables comprenant: -une pluralité de pales (2), chacune à calage variable selon un axe de rotation de pale et chacune présentant un pied, la pluralité de pales comprenant au moins une première pale (21) et au moins une deuxième pale (22), -une pluralité d'arbres de liaison de rotor, chacun présentant un pied et une tête, chaque pied étant monté sur la tête d'un arbre correspondant de liaison de rotor par l'intermédiaire d'un pivot de manière à permettre la rotation de chaque pale (2) selon l'axe de rotation de pale, la première pale (21) présentant une première inclinaison de pale, telle que la première pale (21) est inclinée de manière fixe par rapport à l'axe de rotation de pale de la première pale (21), et la deuxième pale (22) présentant une deuxième inclinaison de pale différente de la première inclinaison de pale.
Abstract:
A gas turbine engine includes a shaft defining an axis of rotation. An inner rotor directly drives the shaft and includes an inner set of blades. An outer rotor has an outer set of blades interspersed with the inner set of blades. The outer rotor is configured to rotate in an opposite direction about the axis of rotation from the inner rotor. A gear system couples the outer rotor to the shaft and is configured to rotate the inner set of blades at a lower speed than the outer set of blades.
Abstract:
L'invention concerne un moyeu d'hélice à pales à calage variable pour une turbomachine, en particulier pour une turbomachine à soufflante non carénée. Le moyeu d'hélice comporte un anneau polygonal 134 avec des logements cylindriques 136 sensiblement radiaux répartis autour d'un axe central de l'anneau 134 pour recevoir lesdites pales, un élément de rotor 143 de turbine de la turbomachine, et une bride de maintien fixée à l'anneau de manière à le relier audit élément de rotor 243. Le moyeu comporte en outre une pluralité de membres de rétention de secours 144 liés à l'élément de rotor 143, et présentant chacun au moins une surface d'appui 145 opposée à une surface extérieure 146 de l'anneau 134 avec un écart radial.
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 turbine assembly for electric generation comprising a first rotor which is rotatable about a rotation axis by the action of a pressurized fluid and one or more magnets (13) arranged on the first rotor to rotate together therewith further comprising a second rotor arranged to rotate coaxially with the first rotor by the effect of the pressurized fluid and electric coil windings (30) arranged on the second rotor to rotate together therewith to produce electricity when the first rotor and the second rotor are rotated by the pressurized fluid in opposite directions.
Abstract:
A gas turbine engine turbine has a high pressure turbine configured to rotate with a high pressure compressor as a high pressure spool in a first direction about a central axis and a low pressure turbine configured to rotate with a low pressure compressor as a low pressure spool in the first direction about the central axis. A power density is greater than or equal to about 1.5 and less than or equal to about 5.5 lbf/cubic inches. A fan is connected to the low pressure spool via a speed changing mechanism and rotates in a second direction opposed to the first direction.