Asbestos packing for mechanical sealing and preparing method of asbestos packing

Abstract

The invention discloses asbestos packing for mechanical sealing and a preparing method of the asbestos packing. An adhesive layer is arranged on the surface of the packing in a permeating manner, and adhesives are rubber-class adhesives. The preparing method of the asbestos packing includes the following steps: 1, common asbestos packing is placed in a vibrator to vibrate in an intermediate-frequency manner or manually beaten or rolled, the surface layer of the packing is vibrated and fluffed, the width of the fluffed packing is 1 mm to 3 mm larger than the original size, and a loosing layer is formed on the surface of the packing accordingly; 2, the fluffed asbestos packing is placed in chlorinated hydrocarbon to be soaked for 30 minutes to 60 minutes to enable the loosing layer of the packing to be completely immersed by the chlorinated hydrocarbon; 3, the chosen adhesives are heated to be in the fused state, the packing obtained in the step 2 is taken out from the chlorinated hydrocarbon and directly submerged in the adhesives for 1 hour to 2 hours, and the packing is taken out and cooled; and 4, the packing taken out from the adhesives is placed in xylol or methylbenzene to be soaked for 20 minutes to 30 minutes, and the packing is taken out and aired for standby application.

Description

technical field [0001] The invention relates to a sealing material, in particular to an asbestos packing for mechanical sealing and a preparation method thereof. Background technique [0002] In the current various mechanical static groove seal structures, the sealing requirements at the junction joints are very high. At present, the commonly used sealing material is in the form of packing, which is filled into the stuffing groove with multiple layers of packing, and the end cover is pressed tightly to achieve sealing. Effect. [0003] The existing packing is divided into soft molding strips, which have the advantages of certain elastic-plasticity, chemical stability, impermeability, self-lubrication, temperature resistance, convenient disassembly and assembly, and simple manufacture. The disadvantage is that during the installation process, processes such as cutting, seaming, inlaying, and compaction must be performed. The installation requirements are high and cumbersome....

AI Technical Summary

Problems solved by technology

[0004] The material of the packing is made of strip-shaped fiber bundles, grease, and graphite. The mixture of grease and graphite is evenly spread on the strip-shaped fiber bundles. The disadvantage of this type of soft seal is the lack of elastic deformation and continuous tension. At the same time, due to the characteristics of its graphite material, it is very easy to be damaged during the mechanical pressing process and a leakage gap will be generated, resulting in a short service life, which is especially serious when used in occasions with relative vibration.