F - Mech Eng,Light,Heat,Weapons – 16 – J
Patent
F - Mech Eng,Light,Heat,Weapons
16
J
277/20
F16J 15/34 (2006.01)
Patent
CA 1181106
HYDRODYNAMIC NON-CONTACTING SEAL FOR ROTARY MACHINES A B S T R A C T A non-contacting, hydrodynamic and face seal in a machine comprises a disc-shaped rotor (1) attached to the machine shaft (2) and an annular stator (3) concentric with the rotor (1) and facing the rotor surface (11) at a small distance. From the stator surface (31) project a number of radially extending weirs (34) which form wedge-shaped gaps with the rotor surface, so formed that the gaps decrease in width in the direction of the velocity of the rotor surface (11) across the weirs, causing a hydrodynamic pressure to build up between the weir edges a and b. The outer end of each weir (34) is connected to the inner end of the adjacent (34), downstream thereof, by a diagonal ridge (35), of a height not exceeding the maximum height of the weirs (34), the ridges and weirs containing between them a high-pressure zone (HP). A rim (36) surrounds the weirs (34) and ridges (35) on their outside and projects from the stator surface (31) towards thy rotor surface (11) a height equal to the maximum height of the weirs (34), and thus forms a dam pre??enting liquid from escaping to the outside of the seal.
420128
Lipschitz Abraham
Sim & Mcburney
LandOfFree
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