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Manufacturing method of carbon fiber reinforced graphite ring for mechanical sealing

A manufacturing method and mechanical seal technology, applied in the field of manufacturing carbon fiber reinforced graphite rings for mechanical seals, can solve problems such as fragility, brittle cracks or fragmentation, and static ring cracks

Inactive Publication Date: 2018-01-05
蒋立宪
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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  • Manufacturing method of carbon fiber reinforced graphite ring for mechanical sealing

Examples

Experimental program
Comparison scheme
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Embodiment

[0007] Example: Manufacturing process and flow of carbon fiber reinforced graphite-based mechanical seal material:

[0008] Carbon fiber preparation: cut the carbon fiber with a fineness of 11Tex to a length of 5-10mm, appropriate amount, and set aside;

[0009] Graphite powder preparation: graphite pulverization, sieving, pulverization, weighing, fineness: 300 mesh, standby;

[0010] Phenolic resin or high viscosity resin: appropriate amount, spare;

[0011] Hexamethylenetetramine: chemically pure, appropriate amount, spare;

[0012] Additives: choose other types of resins, appropriate amount, spare;

[0013] Diluent: absolute ethanol, appropriate amount, spare;

[0014] One-time compounding: According to the ratio required by the process technology, mix phenolic resin, graphite powder, hexamethylenetetramine, additives and diluents at a temperature of 30°C and grind them into fine particles for later use.

[0015] Secondary compounding: According to the ratio required by...

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Abstract

The invention relates to a method for manufacturing a carbon fiber reinforced graphite ring for mechanical sealing. The method described is to place carbon fibers of appropriate length, phenolic resin, graphite powder, hexamethylenetetramine, additives and diluents in a mixer in a certain proportion, mix them uniformly at a temperature of 30-50°C and then load them into In the compression mold, the thermoforming temperature is 30-80°C, and when pressurized to a suitable pressure, the temperature is raised to 120-180°C, and the heat preservation is cured for 5-10 minutes. The graphite-based mechanical sealing material can be manufactured by the method.

Description

technical field [0001] The invention relates to a method for manufacturing a carbon fiber reinforced graphite ring for mechanical sealing. Background technique [0002] At present, the materials commonly used in the static ring of the mechanical seal friction pair 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 pressure con...

Claims

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Application Information

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IPC IPC(8): C04B35/80C04B35/52
Inventor 蒋立宪
Owner 蒋立宪