Turbocharger with sliding blades having combined dynamic...

F - Mech Eng,Light,Heat,Weapons – 02 – C

Patent

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Details

F02C 6/12 (2006.01) F01D 17/14 (2006.01) F01D 17/16 (2006.01)

Patent

CA 2397445

The invention concerns a turbocharger having a variable geometry turbine intake incorporating a mobile cylindrical piston (70) for varying the area of the induction nozzle in the turbine (18). Blades (90) mounted on the piston for controlling the flow in the nozzle penetrate through a slotted heat shield (92) having a central opening wherein the rear disc of the turbine wheel is embedded to provide a smooth aerodynamic flow in the turbine vanes. A shield (100) engaged between the heat screen and a central housing of the turbocharger prevents the gas from the rear disc cavity from recycling into the cavity housing the blades further enhancing the aerodynamic flow. An axial actuating device (77) is secured for operating the piston by means of a shaft coupled by a cross (72) to the piston and coupled to an actuating hub (118) in the actuating device by quick connect unthreaded connection (122). Image

Un turbocompresseur ayant une admission de turbine à géométrie variable incorpore un piston cylindrique (70) déplaçable pour varier l'aire de la tuyère d'admission dans la turbine (18). Des ailettes (90) montées sur le piston pour contrôler l'écoulement dans la tuyère entrent à travers un écran thermique à fentes (92) ayant une ouverture centrale dans laquelle le disque arrière de la roue de turbine est noyé pour fournir un écoulement aérodynamique lisse dans les aubes de turbine. Un bouclier (100), engagé entre l'écran thermique et une enveloppe centrale du turbocompresseur, empêche la recirculation du gaz de la cavité du disque arrière dans la cavité recevant les ailettes pour mettre encore en valeur l'écoulement aérodynamique. Un dispositif d'actionnement axial (77) est attaché pour le fonctionnement du piston par un arbre couplé par un croisillon (72) au piston et couplé à un moyeu d'actionnement (118) dans le dispositif d'actionnement par une connexion rapide sans filetage (122).

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