Packing sealing filler and its preparation method

Abstract

The invention discloses a packing sealing filler and its preparation method. Calculated by weight percentage, the filler is composed by mixing 72%-88% of a mixed material and 12%-28% of modified methyl silica gel. Specifically, in terms of weight percentage, the mixed material is formed by mixing 66%-71% of polytetrafluoroethylene, 25%-28% of glass fiber powder, 4%-8% of a filler, and 2%-10% of molybdenum disulfide. The preparation method of the packing sealing filler consists of: mixing all the raw materials uniformly and then preparing them into a multilayer rubber plate, cutting the plate into strips, using a plodder to press the strips into strip products of various specifications. The filler provided in the invention has the advantages of good self-lubricating performance, small friction coefficient, strong toughness, high chemical stability, swelling and dissolution-proofness, simple preparation, convenient disassembly and assembly, as well as low production cost, thus being suitable for mass production and promotion.

Description

technical field [0001] The invention relates to a packing packing and a preparation method thereof, which belongs to the field of packing and is mainly used for packing seals, shaft seals and the like. Background technique [0002] The stuffing seal is installed in the stuffing box by stuffing, and the stuffing is pressed on the surface of the shaft through the stuffing gland. Since the surface of the shaft is always somewhat rough, it can only be partially attached to the filler, but partially not in contact, thus forming countless labyrinths. When the pressurized medium passes through the surface of the shaft, the medium is throttled several times, and the seal is achieved by virtue of this "labyrinth effect". The fit and friction between the filler and the shaft surface are also similar to sliding bearings. There should be enough liquid for lubrication to ensure a certain life of the seal, which is the so-called "bearing effect". It can be seen that a good packing seal ...

AI Technical Summary

Problems solved by technology

[0004] The traditional sealing packing has the following defects: 1. The traditional packing will grind the shaft sleeve into grooves, and the shaft sleeve needs to be replaced regularly; 2. The traditional sealing packing must be pressed tightly on the shaft to achieve sealing, and the power loss of the water pump is large; 3. Traditional sealing packing cannot contain impurities, and impurities will cause wear to the shaft after entering the sealing part