Floating head reaction turbine rotor with improved jet quality

B - Operations – Transporting – 08 – B

Patent

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Details

B08B 9/032 (2006.01) B05B 1/02 (2006.01) B08B 13/00 (2006.01) E21B 37/04 (2006.01)

Patent

CA 2592770

A rotary jetting tool including a possum-balanced rotor, which is achieved using a vented volume. Axial movement of the rotor relative to the housing caused by pressure imbalances acting on the rotor selectively uncovers or opens a vent that places the volume in fluid communication an ambient volume, enabling the rotor to achieve a pressure balanced condition. A plurality of radial clearance seals between the rotor and the housing are used to provide hydrodynamic bearings to reduce friction between the rotor and housing. The diameters of the seals are manipulated to facilitate pressure balancing of the rotor. In one embodiment, the rotor includes a centrifugal brake configured to control a maximum rotational speed of the rotor. Pressurized fluid is introduced into the rotor in an axial direction, enabling a relatively large upstream settling chamber to be incorporated into the rotor, thereby reducing inlet turbulence and improving jet quality.

Outil rotatif de nettoyage au jet qui possède un rotor à équilibrage de pression obtenu à l'aide d'un volume d'évent. Le mouvement axial du rotor par rapport au carter provoqué par les déséquilibres de pression agissant sur le rotor couvre ou ouvre sélectivement un évent qui place ledit volume en communication fluidique avec un volume ambiant, permettant ainsi au rotor de parvenir à un état équilibré de pression. Plusieurs joints d'étanchéité du jeu radial situé entre le rotor et le carter sont utilisés pour fournir des paliers hydrodynamiques destinés à réduire la friction entre le rotor et le carter. Les diamètres des joints d'étanchéité sont manoeuvrés pour faciliter l'équilibrage de pression du rotor. Dans un mode de réalisation, le rotor comporte un frein centrifuge configuré pour réguler une vitesse de rotation maximale du rotor. Du fluide sous pression est introduit dans le rotor dans le sens axial, ce qui permet l'intégration dans le rotor d'une chambre d'accumulation relativement grande située en amont qui réduit les turbulences d'admission et améliore la qualité du jet.

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