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Silver thin film composited carbon sealing ring and preparation method thereof

A sealing ring and silver thin film technology, which is applied in the direction of engine sealing, mechanical equipment, engine components, etc., can solve the problems of sealing ring sealing effect, cold resistance, heat resistance, etc., and achieve simple structure, reasonable design and excellent performance Effect

Inactive Publication Date: 2014-04-02
HARBIN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the sealing effect, cold resistance and heat resistance of the existing sealing material composite technology and the sealing ring prepared are poor

Method used

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  • Silver thin film composited carbon sealing ring and preparation method thereof
  • Silver thin film composited carbon sealing ring and preparation method thereof
  • Silver thin film composited carbon sealing ring and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A carbon sealing ring with a composite silver film, which comprises: a carbon ring 1, the surface of the carbon ring is compounded with a silver film 2, the inner diameter of the carbon ring is ф10cm, and the outer diameter of the carbon ring is ф12cmm.

Embodiment 2

[0019] A preparation method of a carbon sealing ring of a composite silver film, the first step, adding graphite powder into a mold of a forming machine, pressurizing to form a carbon ring with an inner diameter of ф10cm and an outer diameter of ф12cmm;

[0020] The second step is to carry out surface polishing and other treatments on the carbon ring, and then put it into the mold of the high-pressure vacuum impregnation furnace;

[0021] The third step is to put the solid silver into the crucible in the high-pressure vacuum impregnation furnace, heat it to melt, and at the same time, vacuumize the high-pressure vacuum impregnation furnace, and preheat the carbon ring;

[0022] In the fourth step, when the temperature in the high-pressure vacuum impregnation furnace is 1000-1100°C and the pressure is 20-25Mpa, the outlet of the crucible is aligned with the inlet of the mold pipeline equipped with a carbon ring, so that the molten silver liquid Enter the mold through the pipeli...

Embodiment 3

[0024] According to the preparation method of the carbon sealing ring of the composite silver film described in Example 2, the purity of the graphite powder is above 99%.

[0025] The determination of the carbon seal ring preparation process of the described composite silver film:

[0026] In the preparation process of the carbon sealing ring of the composite silver film, different process parameters directly affect the performance of the carbon sealing ring of the composite silver film, especially the generation of the interface constitutes an important influence. The interface formed by the carbon sealing ring of the composite silver film is mainly wetted, and a small part of the reactive interface exists. When only considering the impregnation effect of graphite materials, the main influencing factors are:

[0027] 1) Metal silver melt temperature: the higher the temperature, the better the fluidity, and the easier it is to fill into the deep layer of the carbon ring, but ...

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Abstract

The invention relates to a silver thin film composited carbon sealing ring and a preparation method thereof, and solves problems of sealing material lubrication, high temperature oxidation and thermal expansion in oil heat extraction sealing technology and problems in composite technology of more sealing materials. A conventional sealing material composite technology and a sealing ring prepared by the conventional technology have the disadvantages that the sealing effect, the cold resisting effect and the heat resisting effect are bad. The method provided by the invention comprises the following steps: a silver film (2) is composited on the surface of a carbon ring (1), the inner diameter of the carbon ring is 10 cm, and the outer diameter of the carbon ring is 12 cm. The invention relates to the sealing ring and the preparation thereof.

Description

Technical field: [0001] The invention relates to a carbon sealing ring of a composite silver film and a preparation method thereof. Background technique: [0002] In order to solve the problems of sealing material lubrication, high temperature oxidation and thermal expansion in oil thermal recovery sealing technology, there are many composite technologies of sealing materials. However, the sealing effect, cold resistance and heat resistance effect of the existing sealing material composite technology and the sealing ring prepared therefrom are poor. [0003] The invention designs the application of metal silver and graphite-based composite materials in petroleum heat recovery sealing technology from the structure and composite method of the composite materials. The influence of the preparation process conditions of the vacuum high pressure impregnation method on the performance of the Ag / graphite sealing ring was studied. Invention content: [0004] The object of the pre...

Claims

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Application Information

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IPC IPC(8): F16J15/00B22D23/04
Inventor 汤卉王文雪李磊
Owner HARBIN UNIV OF SCI & TECH
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