▎ 摘　　要

NOVELTY - The utility model claims an internal pressure packing sealing device of internal mixer, comprising a wearable steel sleeve, a movable ring, a hard alloy ring; a fixed ring and a graphite; the wearable steel sleeve is fixedly installed in the side wall glasses wall plate of the banburying chamber; the fixed ring is fixedly installed on the exposed end surface of the wearable steel sleeve through a bolt and is sleeved and pressed on the outer circumference side of the movable ring; the graphite is embedded on the sealing surface of the end part of the fixed ring; the movable ring and the rotor are transitionally matched and installed with a key pin; the inner cavity of the movable ring is installed with a spring; pressing screw; one end of the spring is propped against the rotor side wall; the other end is propped against the tightening screw; the hard alloy ring is sleeved on the outer circumference side of the movable ring; the graphene is stripped between the hard alloy ring and the fixed ring in the mechanical contact friction sealing movement process; the graphene is helpful for lubricating so as to achieve the purpose of oilless self-lubricating; it greatly reduces the use cost, but also reaches the energy-saving and environment-friendly requirement; It satisfies the actual use requirement.