초록 ▼

A rubbing strip is used in conjunction with the sealing strips of a seal to prevent contact between the sealing strips and a rotating member with which the sealing strips form a seal. The rubbing strip comprises a strip of material which is oriented coaxially with the sealing strips and which has a

A rubbing strip is used in conjunction with the sealing strips of a seal to prevent contact between the sealing strips and a rotating member with which the sealing strips form a seal. The rubbing strip comprises a strip of material which is oriented coaxially with the sealing strips and which has a clearance with respect to the rotating member which is less than the least of the clearances provided by the sealing strips with which it is associated. The material and the cross-sectional shape of the rubbing strip may be selected in accordance with desired wear properties. The rubbing strip may be formed integrally with a sealing ring, or may be formed to be inserted into a complementary receiving recess on a sealing ring.

대표청구항 ▼

A seal for a turbine comprising: ring means, supportable by a stationary member of said turbine, for encircling a rotating member of said turbine, at least one substantially circular sealing strip supported by said ring means and extending from said ring means toward an exterior surface of said rota

A seal for a turbine comprising: ring means, supportable by a stationary member of said turbine, for encircling a rotating member of said turbine, at least one substantially circular sealing strip supported by said ring means and extending from said ring means toward an exterior surface of said rotating member, and a substantially circular rubbing strip supported by said ring means and extending from said ring means toward said exterior surface of said rotating member, said rubbing strip having a clearance with respect to said exterior surface of said rotating member which is less than the least of clearances of said at least one sealing strip with respect to said exterior surface of said rotating member, said rubbing strip being axially separated from each of said at least one sealing strips.