| 摘要 |
A buffer seal (200) adapted for use in a seal assembly (105) including at least a primary seal (150), the seal assembly being adapted to provide a fluid seal between two relatively moving machine elements, such as a piston or rod (111) of a first machine element (110) moving within a cylindrical bore (121) of a second machine element (12=). The buffer seal comprises a sealing element (220) and a resiliently deformable biasing element (240). The material, shape, and/or volume of the biasing element are selected to provide a desired biasing force sufficient to maintain a surface of the sealing element in sealing contact with a surface of the first machine element and to simultaneously maintain another surface of the sealing element in sealing contact with a surface of the second machine element (120). The buffer seal may be further configured to inhibit the migration of system contaminants to the primary seal. |
