Carbon/carbon composite material sealing ring and production method thereof

A technology of carbon composite materials and production methods, which is applied in the field of wear-resistant sealing parts, and can solve problems affecting the quality of rubber mixing

Active Publication Date: 2011-01-26
HUNAN KINGBO CARBON CARBON COMPOSITES CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The injected high-pressure oil often enters the mixing chamber, which affects the quality of rubber mixing, especially the mixing and final mixing of medical rubber and some rubber types that cannot be added.

Method used

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  • Carbon/carbon composite material sealing ring and production method thereof
  • Carbon/carbon composite material sealing ring and production method thereof
  • Carbon/carbon composite material sealing ring and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Depend on figure 1 It can be seen that a carbon / carbon composite sealing ring is made of carbon fiber through blanking-densification-machining, and the apparent density of the sealing ring is 1.2g / cm 3 ~2.0g / cm 3 (the present embodiment is 1.56g / cm 3 ).

[0026] A method for producing a carbon / carbon composite seal ring as above, comprising the following steps:

[0027] (1) Billet making: select short carbon fibers with a length of 6mm-70mm, and open them into fluffy needle-like fibers through an opening device, then air-laid and / or combed the opened carbon fibers into a net, and then use the net to lay The machine is laid into a fiber net and prepunched into a mesh tire. The mesh tire and carbon cloth made of carbon fiber are laminated and compounded by needling according to the required density to make a plate-like or ring-shaped prefabricated body (ring-shaped in this embodiment). The apparent density of the preform is 0.3g / cm 3 ~0.7g / cm 3 (the present embodim...

Embodiment 2

[0032] The apparent density of the sealing ring is 1.8g / cm 3 .

[0033] In order to shorten the production cycle and reduce costs in this embodiment, in step (2), after carrying out 2 cycles of chemical vapor deposition densification, the green body is put into an impregnation furnace and immersed in a thermoplastic resin (furan resin in this embodiment) ) for impregnation curing and densification. The apparent density of the green body after chemical vapor deposition densification reaches 1.2g / cm 3 , and then put the green body into the impregnation furnace for impregnation, solidification and densification, so that the apparent density of the green body reaches 1.8g / cm 3 , after graphitization treatment, made green body.

[0034] In impregnation curing and densification, the immersion temperature is 50°C-80°C, the pressure is 1MPa-3MPa, the immersion time is 1.5h-4h; the curing temperature is 160°C-230°C, the pressure is 1MPa-3MPa, and the curing time is 1.5h- 4h, 1 to 3 c...

Embodiment 3

[0039] In order to reduce the production cost of the carbon / carbon composite sealing ring and improve the comprehensive performance, the friction surface and the ring body of the sealing ring adopt density gradient setting.

[0040] A carbon / carbon composite sealing ring, the sealing ring includes a friction surface 1 and a ring body 2, both of the friction surface 1 and the ring body 2 are made of carbon fiber through blank making-densification-machining, the surface of the friction surface 1 of the sealing ring The apparent density is 1.5g / cm 3 ~2.0g / cm 3 (the present embodiment is 1.8g / cm 3 ), the apparent density of ring body 2 is 1.2g / cm 3 ~1.8g / cm 3 (the present embodiment is 1.5g / cm 3 ).

[0041] A method for producing a carbon / carbon composite seal ring as above, comprising the following steps:

[0042] (1) Billet making: select short carbon fibers with a length of 6mm-70mm, and open them into fluffy needle-like fibers through an opening device, then air-laid and...

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Abstract

The invention discloses a carbon / carbon composite material sealing ring for an oil-free lubricated mixer. The sealing ring is prepared from carbon fiber through blank preparation, densification and mechanical processing and has the apparent density of 1.2-2.0 g / cm<3>. The production method of the carbon / carbon composite material sealing ring comprises the following steps of: preparing a carbon fiber blank; densifying; and mechanically processing. The invention favorably realizes the invention aims; and the sealing ring made from the carbon / carbon composite material has good lubricating performance, wear resistance and excellent anti-corrosion performance and ensures the sealing effect of a mixer rotor and the safe operation of the equipment. In addition, the friction surface of the sealing ring and the ring body are set by adopting density gradient to decrease the production cost of the carbon / carbon composite material and improve the comprehensive performance.

Description

Technical field: [0001] The invention relates to a wear-resistant sealing part, in particular to a carbon / carbon composite sealing ring and its production method, in particular to a carbon / carbon composite sealing ring for internal mixers and its production method. Background technique: [0002] The internal mixer is an indispensable main equipment in the modern rubber industry, mainly used for masticating and mixing of rubber. The internal mixer has a pair of rotors with a specific shape and relatively rotating, in a closed state at a certain temperature and pressure, it can masticate and knead polymer materials such as rubber intermittently. The equipment is usually composed of mixing chamber, rotor, rotor sealing device, lubrication system, transmission device, machine base and so on. At present, the rotor sealing device generally adopts a mechanical or hydraulic sealing structure, and the sealing ring is processed by metal materials. In order to improve the wear resista...

Claims

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Application Information

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IPC IPC(8): B29B7/22F16J15/16C04B35/83
Inventor廖寄乔邰卫平王跃军龚玉良黄伯云
OwnerHUNAN KINGBO CARBON CARBON COMPOSITES CO LTD