|국가/구분||United States(US) Patent 등록|
|발명자 / 주소|
|출원인 / 주소|
|대리인 / 주소||
|인용정보||피인용 횟수 : 15 인용 특허 : 23|
A seal comprises the combination of a primary seal and a secondary seal each of which acts on at least one shoe that is installed with clearance relative to one of a rotor and a stator in a position to create a non-contact seal therewith. The at least one shoe is provided with a surface geometry and labyrinth-type teeth that influence the inertia of fluid flowing across the seal, and, hence, the velocity of the fluid and the pressure distribution across the seal, ultimately affecting the balance of forces applied to the seal.
1. A sealing apparatus, comprising: a stationary first machine component and a second machine component which is radially spaced from and rotatable relative to said first machine component about a longitudinal axis, a circumferential gap being formed by said radial space between said first and second machine components;at least one shoe having a first surface and a second surface spaced from said first surface, said at least one shoe being subjected to aerodynamic forces applied in a direction along said longitudinal axis, said first surface being formed...