FIELD: evacuation of air and gases. SUBSTANCE: end face intermediate bearing covers are mounted to define the working chamber inside the housing and oil spaces between the covers, the spaces being in communication with a pipe line. Profiled rotors are mounted inside the chamber and secured to shafts set in bearings of the intermediate covers. Each of the sealing units is constructed as bushing, seal, and pressing nut. The pipe line is non-detachable. Recesses having a seat plane are made in the intermediate covers. The faces of the pipe line and sealing units secured to them are arranged in the cover recesses. EFFECT: improved design. 1 dwg
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| VACUUM EVACUATION SYSTEM | 0 |
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SU1603058A1 |
