1results about How to "Reduce lubrication" patented technology

The utility model belongs to roots pump technical field relates to a sealing structure of roots pump, including motor, pump body, pivot, rotor blade and end cover, the pivot is fixed with the shaft sleeve on rotor blade both ends, the shaft sleeve with the central hole rotation cooperation of end cover, the outer wall of shaft sleeve is provided with first annular groove and second annular groove at intervals, be provided with in first annular groove, the shaft sleeve and end cover form piston type sealing through cooperation, be provided with steel cover in second annular groove, the outside of end cover is provided with third annular groove, the sealing ring of inner wall with sealing lip is fixed in third annular groove, end cover forms lip seal type sealing through sealing lip with the cooperation of steel cover, the advantage is: simple structure, low in production cost, good sealing performance, convenient for popularization and application.