Device for damping vibrations in turbomachinery blades

Details Device for damping vibrations in turbomachinery blades Device for damping vibrations in turbomachinery blades

1990-02-20

1991-10-01

Look, Edward K.

Fluid reaction surfaces (i.e., impellers)

Rotor having flow confining or deflecting web, shroud or...

Axially extending shroud ring or casing

416500, F01D 510

Patent

active

050528904

ABSTRACT:
In a gas turbine engine, a turbine blade vibration damper is located between the underside of a blade platform and a turbine disc, and comprises a member which extends axially parallel to the blade roots. The member has on its outer surface an inverted "V" shaped projection which engages a complementary shaped recess in the underside of the blade platforms. The member has two limbs of unequal length. Centrifugal forces on the longer limb rocks the member and urges the shorter limb into engagement with the disc rim.

REFERENCES:
patent: 3887298 (1975-06-01), Hess et al.
patent: 4088421 (1978-05-01), Hoeft
patent: 4101245 (1978-07-01), Hess et al.
patent: 4182598 (1980-01-01), Nelson
patent: 4192633 (1980-03-01), Herzner
patent: 4347040 (1982-08-01), Jones et al.
patent: 4355957 (1982-10-01), Sifford et al.
patent: 4455122 (1984-06-01), Schwarzmann et al.
patent: 4568247 (1986-02-01), Jones et al.

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