초록 ▼

A brush seal (1, 101) seals a circumferential gap (S.sub.1) between two relatively rotatable machine components (2, 102; 3, 103), such as the rotor or a shaft and a stator of a fluid flow machine, such as a gas turbine engine. A plurality of seal bristles (4, 104) are fixed in a bristle holder (5) i

A brush seal (1, 101) seals a circumferential gap (S.sub.1) between two relatively rotatable machine components (2, 102; 3, 103), such as the rotor or a shaft and a stator of a fluid flow machine, such as a gas turbine engine. A plurality of seal bristles (4, 104) are fixed in a bristle holder (5) in an annular shape, and are mounted on the stator (3, 103) so that the free bristle ends (7, 107) extend toward and provide a seal against a seal surface (9, 109) of the rotor (2, 102). Each bristle includes a middle body portion (4A) that is tilted at a first tilt angle (.alpha..sub.1) in the circumferential direction following the rotation direction, and the free bristle end (7, 107) is bent or angled relative to the tilted body portion (4A) so as to extend at a second tilt angle (.alpha..sub.2) which is smaller than the first tilt angle (.alpha..sub.1). Preferably, the first tilt angle (.alpha..sub.1) is in the range from 30.degree. to 60.degree., while the second tilt angle (.alpha..sub.2) is in the range from 0.degree. to 15.degree.. The bristles may further be tilted in an axial direction at an angle (.beta.) relative to a radially extending plane. Since the free bristle ends (7, 107) extend substantially perpendicularly to the seal surface (9, 109), the seal effectiveness and the elastic resiliency of the brush seal are maintained, and the bristles are not damaged, independent of the rotation direction of the rotor.

대표청구항 ▼

[ What is claimed is:] [1.] A brush seal for sealing a circumferential gap between first and second rotary machine components of which one is rotatable relative to another, said brush seal comprising a plurality of seal bristles that are arranged in an annular shape and that each respectively includ

[ What is claimed is:] [1.] A brush seal for sealing a circumferential gap between first and second rotary machine components of which one is rotatable relative to another, said brush seal comprising a plurality of seal bristles that are arranged in an annular shape and that each respectively include a fixed end, a tilted section, and a free end portion terminating in a free end tip, wherein said fixed end of each said bristle is adapted to be secured to the first component, said free end portion of each said bristle is adapted to be directed with said free end tip toward a seal surface of the second component, said tilted section of each said bristle is tilted at a first tilt angle (.alpha..sub.1) in a circumferential direction, said free end portion of each said bristle extends at an angle relative to said tilted section such that said free end portion is tilted at a second tilt angle (.alpha..sub.2) in said circumferential direction, and said second tilt angle (.alpha..sub.2) is smaller than said first tilt angle (.alpha..sub.1).