Balancing a pressure drop across ring seals in gas turbine engin

Details Balancing a pressure drop across ring seals in gas turbine engin Balancing a pressure drop across ring seals in gas turbine engin

1998-12-23

2000-10-17

Look, Edward K.

Rotary kinetic fluid motors or pumps

With lubricating, sealing, packing or bearing means having...

For shaft sealing, packing, lubricating or bearing means

415107, 415111, 4151684, 4151745, F01D 1100

Patent

active

061321680

ABSTRACT:
A gas turbine engine includes a plurality of seal stages minimizing leakage of high pressure air from a high pressure cavity into a low pressure cavity. The plurality of seal stages includes an upstream seal stage, substantially adjacent to the high pressure cavity, and a downstream seal stage, substantially adjacent to the low pressure cavity. Each seal stage includes a seal plate and at least one seal. The downstream seal plate includes a plurality of bleeding holes for metering higher pressure air into the low pressure cavity, thereby balancing a pressure drop between the seal stages. Substantial equalization of the pressure drop among the seal stages reduces wear of the downstream seal and therefore, increases useful life an effectiveness thereof.

REFERENCES:
patent: 2921805 (1960-01-01), Shevchenko
patent: 3334905 (1967-08-01), Horwitz et al.
patent: 4272084 (1981-06-01), Martinson et al.
patent: 5217233 (1993-06-01), Pecht et al.

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