▎ 摘　　要

NOVELTY - Preparing polytetrafluoroethylene composite rotary control head seal comprises uniformly mixing 65-75 pts. wt. polytetrafluoroethylene, 10-15 pts. wt. thermally conductive carbon fiber, 5-10 pts. wt. polyfluoroethylene propylene, 2-5 pts. wt. molybdenum disulfide, 2-4 pts. wt. glass fiber, 2-4 pts. wt. basalt fiber, 2 -4 pts. wt. copper powder, 2-5 pts. wt. polyetheretherketone fiber, 0-3 pts. wt. graphene and 0-2 pts. wt. alumina to obtain a mixed powder, molding the mixed powder to obtain the blank , and sintering the blank at high temperature to obtain a polytetrafluoroethylene composite material, and subjecting polytetrafluoroethylene composite material to mechanical processing and performing heat treatment. USE - The method is useful for preparing polytetrafluoroethylene composite rotary control head seal. ADVANTAGE - The control head sealing has excellent thermal conductivity and wear resistance, has high sealing performance and long service life. DETAILED DESCRIPTION - INDEPENDENT CLAIMS are also included for: Polytetrafluoroethylene composite rotary control head seal prepared by above method; and A sealing structure, comprising the sealing structure has anode and cathode working direction, and has a self-compensation function, where the sealing structure comprises a sealing piece main body, a compensation spring and an outer sealing ring, the sealing piece main body is provided with a mounting groove with different specifications and sizes, the compensation spring is located in the mounting groove, the wire diameter of the compensation spring has a K value with the groove width of the mounting groove, the compensation spring is support the sealing piece main body lip, the outer sealing ring is located in the mounting groove, and the outer sealing ring is a sealing cavity inner circle structure. DESCRIPTION OF DRAWING(S) - The drawing shows a schematic diagram of polytetrafluoroethylene composite rotary control head seal.