| 摘要 |
The rigidity of bristles in a direction of pressure difference between a high-pressure side and a low-pressure side is increased, the rigidity in a direction orthogonal to the direction of pressure difference is decreased, thereby reducing the wear of bristles, and also the leakage of sealed fluid is reduced. Provided is a brush seal having: a bristle part formed by multiple bristles attached to a stationary part between the stationary part and a rotational part that undergo relative motion by maintaining a space in between; and a back plate attached adj acent to the bristle part on its low-pressure side to restrict the movement of the bristle part, wherein such brush seal for sealing fluid flowing between the stationary part and rotational part is characterized in that the bristle part formed by multiple bristles is such that the multiple bristles arranged in the direction of pressure difference between the high-pressure side and low-pressure side are mutually fixed between a base end and a free end to form planar bristles and these planar bristles are arranged continuously in layers in a circumferential direction to form the circular bristle part; and wherein circumferential grooves are formed on the sealing face of the bristle part on its free end side. |
