Reformable soft gasket

Abstract

The reformable soft gasket consists of chloroprene rubber 2-10 wt%, teflon emulsion 50-84 wt%, silk floss or polymer fiber 3-20 wt%, reinforcing stuffing 0.5-5 wt%, lubricating oil 10-20 wt%, plasticizer 0.5-3 wt% and graphite 0-24 w. The gasket of the present invention has the features of excellent sealing performance, high durability, low friction coefficient, no need of water cooling, good self-lubricating performance, no wear of shaft and muff, power saving, corrosion resistance, capacity of being reused, etc.

Description

field of invention [0001] The invention relates to a sealing packing used for various pumps, valves, speed reducers, etc. The sealing packing has the characteristics of good sealing effect, excellent durability, low friction coefficient, recyclable use and the like. Background technique [0002] In traditional pump seals, packing seals and mechanical seals have always occupied a dominant position. The working principle of the packing seal is that the packing is subjected to the axial pressing force from the flange cover, which deforms the packing, forms a radial expansion force, and hugs the shaft tightly, so as to achieve the purpose of sealing. Whether it is the early oil-immersed packing, or the recent graphite packing, PTFE packing, due to their physical and chemical characteristics, determines that this kind of sealing has the following major defects: [0003] 1. The radial expansion force makes the shaft or sleeve wear seriously, and the sleeve needs to be replaced re...

AI Technical Summary

Problems solved by technology

[0003] 1. The radial expansion force makes the shaft or sleeve wear seriously, and the sleeve needs to be replaced regularly, resulting in waste of personnel and materials

[0004] 2. The heat generated by friction must be dissipated through the leakage of the medium, polluting the environment

[0005] 3. The life is short and needs to be replaced regularly. During the replacement, the water seal ring is prone to axial displacement, which brings difficulties to maintenance

[0006] 4. It cannot be recycled, and the pump body can only be discarded for regular maintenance, resulting in garbage

[0007] 5. The radial expansion force increases the friction between the packing and the bushing, consumes a certain amount of shaft power, and increases useless work

However, due to the short life of the packing and the need for regular replacement and maintenance, the annual comprehensive cost of the packing seal is not low

[0009] Although the mechanical seal is a form of sealing with better sealing performance, because of its high single cost, it has high requirements for manufacturing, installation and maintenance, and it cannot effectively resist acid, alkali, salt and corrosive media. Its wide application has been greatly restricted

Images