| 摘要 |
A balanced mechanical shaft seal (1) typically comprises a rotary assembly (7) for attachment to the shaft (3) and a stationary assembly (9) for attachment to a housing (5) surrounding the shaft (3).
<??>A stationary assembly according to the present invention for a balanced mechanical shaft seal (1) comprises a first annular member (41) for surrounding the shaft (3) and attachable to the housing (5), a second annular member (47) having a radial face (52) for mating with a radial face (27) of the rotary assembly (7), and a third annular member (53) between the first and second annular members (41, 47), the arrangement being such that relative pivotal or rocking movements is permitted about a first axis between the first and third members (41, 53) and about a second axis at right angles to the first axis between the second and third members (47, 53), such movement resulting in no axial force being exerted between the members. |
