Screw tail sealing device of screw extruder

The utility model discloses a screw rod tail sealing device of a screw rod extruder, which comprises a sealing gland, a sealing ring and a screw rod, the sealing gland is sleeved on the screw rod, four parallel circular grooves are arranged on the inner side of the sealing gland, three parallel circular grooves are arranged on the inner side of the sealing ring, each circular groove is provided with a sealing ring, and the sealing ring is sleeved on the screw rod. And the sealing gland is connected with a bolt. The utility model has the beneficial effects that the traditional structure that the tail part of the screw rod is purely filled with the packing is changed, and the circular grooves are formed in the sealing gland and the sealing ring, so that the sealing effect is good, and the disassembly is convenient; the polytetrafluoroethylene sealing ring is arranged as a friction pair, so that the wear resistance of the sealing ring is improved. 本实用新型公开了一种螺杆挤出机的螺杆尾部密封装置，包括密封压盖、密封圈和螺杆，所述密封压盖套在螺杆上，密封压盖内侧有四条平行圆形凹