Patent ID: 6609882
Filing Date: 2003-08-26
Classification: F01D,F05D

Abstract:
In a turbo engine having a housing, a rotor disposed in the housing, a balance piston with a side surface fixed to the rotor, and a low pressure region in the housing, a device for compensating for an axial thrust, the device comprising:a radial seal acting between the rotor and the housing; an axial seal disposed between the side surface of the balance piston and the housing, the balance piston, the housing, said radial seal and said axial seal defining a compensating chamber, a space between said axial seal and the balance piston defining an axial clearance and said axial clearance being variable in correspondence to an operation-related axial displacement of the rotor; and a compensating line for bringing about a pressure balance between the low-pressure region of the turbo engine and the device for compensating for the axial thrust, the balance piston being charged with a pressure prevailing in said balance chamber and the pressure being dependent on the axial clearance, said compensating line charges an additional space disposed between said compensating chamber and an environment and defined by the housing and the rotor, the additional space having a final pressure.