| 摘要 |
A hydraulic torque motor for civil engineering machines comprises a housing and a shaft rotatably mounted in said housing, wherein between housing and shaft at each of the two ends of said shaft one respective annular seal of an elastic material is received in a radial opening in said housing and/or in said shaft and compressed in the assembled condition, so that said shaft is mounted in said housing in a fluid-tight manner. One respective mechanical face seal is arranged axially on the outside next to each of said two annular seals and comprises two metallic slide rings and two elastically deformable O-ring seals, which are compressed in the assembled condition so as to axially and/or radially urge said slide rings towards each other and towards said housing or said shaft, with said mechanical face seal thus sealing said associated annular seal against an external environment.
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