Method and apparatus for fan blade tip clearance

Details Method and apparatus for fan blade tip clearance Method and apparatus for fan blade tip clearance

1982-11-08

1984-10-23

Shepperd, John W.

Rotary kinetic fluid motors or pumps

Bearing, seal, or liner between runner portion and static part

Erodable or permanently deformable

415197, 291568CF, F03D 1100

Patent

active

044785526

ABSTRACT:
A method and apparatus for adjusting the amount of clearance between the tips of the blades of a large axial flow fan and the inner surfaces of the fan cylinder wall. A plurality of foam spacer panels are secured to the inner surfaces of the fan cylinder walls. A cutting means is attached to the outer end of the longest fan blade and extends a short distance outwardly therefrom. Rotation of the fan causes the cutting means to trim the spacer panels to achieve the required clearance. A plurality of plastic sheets are secured to the spacer panels in covering relationship thereto.

REFERENCES:
patent: 2840343 (1958-06-01), Brandt et al.
patent: 3423070 (1969-01-01), Corrigan
patent: 3689971 (1972-09-01), Davidson
patent: 3799128 (1974-03-01), Small
patent: 4207024 (1980-06-01), Bill et al.

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