Graphitic stationary ring for mechanical seal device and manufacturing method thereof

Abstract

The invention relates to a graphitic stationary ring for a mechanical seal device and a manufacturing method thereof. The graphitic stationary ring for the mechanical seal device is composed of a metal, graphite, an adhesive and a friction surface indenture. The metal is a ferronickel alloy. The coefficient of linear expansion of the alloy is 0.5*10<-6> which is far lower than the coefficient of linear expansion of the alloy: 4.5*10<-6> of the stationary ring of specification and standard request, so that the stationary ring fully meets the operating requirement. The adhesive can be an organicadhesive or other adhesives. The manufacturing process comprises the following steps: putting a ferronickel alloy metal ring or metal sheet, graphite uniformly mixed in a specified proportion and theadhesive in a mold to be pressed and formed; putting the pressed and molded graphitic stationary ring at a high temperature to be heated and cured; and then engraving indentures of different dimensions in a friction working surface of the graphitic stationary ring by a special processing device after standing is carried out.

Description

technical field [0001] The invention relates to a graphite static ring for a mechanical sealing device and a manufacturing method thereof. Background technique [0002] At present, the materials commonly used for the static rings in the friction pairs of mechanical seals are mostly graphite materials. Graphite is the most widely used material for friction pairs in the mechanical seal industry. It has good self-lubricating properties, low friction coefficient, excellent corrosion resistance, excellent thermal conductivity, low linear expansion coefficient, excellent combination performance and temperature resistance. Easy processing and other characteristics, therefore, its application range is extremely wide, and the number of applications is extremely large. However, the static ring of the friction pair made of graphite material has a fatal weakness, that is, its mechanical strength is very low, it is very fragile, and it is easy to be brittle and broken under uneven press...

AI Technical Summary

Problems solved by technology

However, the static ring of the friction pair made of graphite material has a fatal weakness, that is, its mechanical strength is very low, it is very fragile, and it is easy to be brittle and broken under uneven pressure conditions.

Many manufacturers and users of mechanical seals have the same personal experience, that is, during the transportation and transshipment process of the mechanical seal static ring made of graphite material, it is very easy to be cracked, brittle or broken by external force during loading and unloading. In addition, the manufacturer or user may cause the static ring to break and become a waste product due to a slight improper force during the assembly and installation of the mechanical seal, resulting in waste of finished products and loss of time.

This has been a headache in the industry, and no more effective solution has been proposed so far

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