Large resistive double-vacuum gas-phase carbon deposition device

Abstract

The invention discloses a large resistive double-vacuum gas-phase carbon deposition device, which comprises a tank outside a furnace, a ceramic fiber furnace liner, a plurality of nickel-chromium heating belts fixedly hung on the inner side of the ceramic fiber furnace liner, a vacuum pipeline A communicated with the tank outside the furnace, a temperature detection unit, a control cabinet, an in-furnace tank sleeved in the tank outside the furnace coaxially from top to bottom and having a suspended lower part, an air inlet pipe inserted into the in-furnace tank, a vacuum pipeline B communicated with the in-furnace tank, and a sealing furnace cover covering the in-furnace tank, wherein the bottom of the in-furnace tank is provided with a ceramic fiber insulating layer A and a graphite bottom plate; the lower part of the sealing furnace cover is provided with a plug-type insulating cylinder; and a ceramic fiber insulating layer B and a hardening carbon felt plate of which the outside is attached with flexible graphite paper are laid in the plug-type insulating cylinder. The device is reasonable in design, convenient to assemble, easy and convenient to operate and good in using effect; by adopting a double-vacuum structure, the device solves the problem of thermal deformation of heat resistant steel at the temperature of between 800 and 1,000 DEG C; meanwhile, the energy consumption is low, the manufacturing cost is low, and the device can produce carbon / carbon products with the diameter of more than 3 meters.

Description

technical field [0001] The invention belongs to the technical field of carbon / carbon composite material equipment, and in particular relates to a large-scale resistive double-vacuum gas-phase carbon deposition device. Background technique [0002] At present, there are mainly two types of equipment for producing carbon / carbon composite materials using the isothermal CVI (chemical vapor infiltration) process at home and abroad: the first type is the external thermal CVI process equipment using medium frequency induction, such as the French Carbon Industie company, British Dunlop Company, American Goodyear, Bendix, B.F.Goodrich Company, my country's Xi'an Aviation Brake Co., Ltd., Shandong Luhang Materials Co., Ltd., etc. all use medium-frequency induction type external heat isothermal CVI process equipment, and the maximum furnace diameter is 2.5m. It can produce carbon / carbon products below 2.0m, and its carbon precipitation temperature can reach 1200°C, but its weakness is hi...

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a large-scale resistive double-vacuum gas-phase carbon precipitation device, which is simple in structure, reasonable in design, easy to assemble, easy to use and operate, and good in use effect. The vacuum structure effectively solves the problem of thermal deformation of heat-resistant steel in the working environment of 800°C to 1060°C. At the same time, the equipment consumes low energy and manufacturing costs, and can produce carbon / carbon composite products with a diameter of more than 3 meters.

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