초록 ▼

Apparatus associated with a labyrinth seal of a turbo machine for automatically maintaining a desired clearance between lip members and a wear seal of the labyrinth seal over a range of operational states of the turbo machine. The wear seal comprises a first part made of honeycomb material and a sec

Apparatus associated with a labyrinth seal of a turbo machine for automatically maintaining a desired clearance between lip members and a wear seal of the labyrinth seal over a range of operational states of the turbo machine. The wear seal comprises a first part made of honeycomb material and a second smooth part spaced axially from the first part. An annular carrier supports the wear seal, and a stator supports the carrier, thereby defining between the carrier and the stator an annular chamber having radially outer orifices for admission of an air supply to the chamber. An annular sheet member disposed within the annular chamber has a plurality of holes and is spaced at a small distance from the carrier. Whereas acceleration and deceleration of the turbo machine normally would tend to alter the spacing of the wear seal and the lip members, the structure recited above corrects for this effect, thereby maintaining a desired clearance between the wear seal and the lip members.

대표청구항 ▼

In a turbo machine: a labyrinth seal comprising a plurality of rotary lip members and a wear seal spaced at a clearance from and cooperating with the peripheries of the lip members; an annular carrier supporting the wear seal; a stator supporting the carrier; and means for automatically controlling

In a turbo machine: a labyrinth seal comprising a plurality of rotary lip members and a wear seal spaced at a clearance from and cooperating with the peripheries of the lip members; an annular carrier supporting the wear seal; a stator supporting the carrier; and means for automatically controlling said clearance during various operational states of the turbo machine, comprising: a first part of said wear seal, being made of honeycomb and having a surface facing said lip members across said clearance, a second part of said wear seal, being spaced axially from said first part to form therebetween an aperture of said wear seal, said second part having a surface facing said lip members across said clearance that is substantially smoother than said surface of said first part, an annular chamber formed by said stator and said carrier and having radially outer orifices for the admission of an air supply to said annular chamber, there being a series of apertures in said annular carrier communicating said annular chamber with said aperture of said wear seal, and an annular sheet metal member having a plurality of holes therein, disposed within said annular chamber and spaced from said annular carrier by a small distance.