Method for manufacturing airplane brake wheel through narrow slit directional flow

An aircraft carbon and directional flow technology, which is applied to mechanical equipment, friction linings, etc., can solve the problems of uneven density of carbon discs and poor air permeability, achieve smooth directional flow of gas, prevent the formation of harmful carbon black, and good effect

Inactive Publication Date: 2006-12-20
XIAN CHAOMA SCI TECH
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem of the present invention is: to overcome the deficiencies of the prior art, and to provide a method for preparing aircraft carbon brake discs by slit directional flow. Seams, thus overcoming the uneven density of the carbon plate, poor air permeability, and the disadvantages of easily producing harmful carbon black

Method used

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  • Method for manufacturing airplane brake wheel through narrow slit directional flow

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Effect test

Embodiment 1

[0020] (1) The aircraft carbon brake disc preform 5 has an outer diameter of 300 mm to 600 mm, an inner diameter of 150 mm to 350 mm, a thickness of 15 mm to 35 mm, and an initial density of 0.56 g / cm 3 Set on the graphite supporting plate 7 between the inner graphite heating element 1 and the outer graphite barrel 3, each prefabricated body 5 is separated by a graphite gasket 6 of equal thickness, and the thickness of the graphite gasket is 0.5mm. The carbon source formed Gas C 3 h 6 The passage to the inside is directed from the outside of the preform 5 . 35 charcoal disc prefabricated bodies 5 can be loaded at one time, and the graphite cover plate 2 is covered.

[0021] (2) The carbon source gas C 3 h 6 It enters the outside of the charcoal disc prefabricated body 5 through the air inlet pipe 8, and its flow rate is determined according to the total mass of the furnace prefabricated body, and the carbon source gas C is required per kilogram of prefabricated body per ho...

Embodiment 2

[0024] (1) The aircraft carbon brake disc preform 5 has an outer diameter of 300 mm to 600 mm, an inner diameter of 150 mm to 350 mm, a thickness of 15 mm to 35 mm, and an initial density of 0.56 g / cm 3 Set on the graphite supporting plate 7 between the inner graphite heating element 1 and the outer graphite barrel 3, each prefabricated body 5 is separated by a graphite gasket 6 of equal thickness, and the thickness of the graphite gasket is 4mm. The carbon source gas formed C 3 h 6 The passage to the inside is directed from the outside of the preform 5 . 45 charcoal disc prefabricated bodies 5 can be loaded at one time, and the graphite cover plate 2 is covered.

[0025] (2) The carbon source gas C 3 h 6 It enters the outside of the charcoal disc prefabricated body 5 through the air inlet pipe 8, and its flow rate is determined according to the total mass of the furnace prefabricated body, and the carbon source gas C is required per kilogram of prefabricated body per hour...

Embodiment 3

[0028] (1) The aircraft carbon brake disc preform 5 has an outer diameter of 300 mm to 600 mm, an inner diameter of 150 mm to 350 mm, a thickness of 15 mm to 35 mm, and an initial density of 0.56 g / cm 3 Set on the graphite supporting plate 7 between the inner graphite heating element 1 and the outer graphite barrel 3, each prefabricated body 5 is separated by a graphite gasket 6 of equal thickness, and the thickness of the graphite gasket is 2 mm. The carbon source gas formed C 3 h 6 The passage to the inside is directed from the outside of the preform 5 . 40 charcoal disc prefabricated bodies 5 can be loaded at a time, and covered with a graphite cover plate 2 .

[0029] (2) The carbon source gas C 3 h 6 It enters the outside of the charcoal disc prefabricated body 5 through the air inlet pipe 8, and its flow rate is determined according to the total mass of the furnace prefabricated body, and the carbon source gas C is required per kilogram of prefabricated body per hour...

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Abstract

The invention is a method to prepare plane carbon brake disc by slot oriented flow, and its character: holding procast bodies of the carbon brake disc in a furnace, putting equal-thickness graphite pads between these procast bodies, thus composing a slot oriented flow closed path of carbon source gas; regulating the flux of the carbon source gas according to total mass of the procast bodies in the furnace; controlling the temperature of the outside low-temperature of the procast bodies and raising the temperature in a step mode, able to hold carbon brake discs 35-45 plates. It effectively enhances utilization ratio of carbon source gas and gas oriented flow path is smooth without gas retention place, preventing harmful carbon black from forming; regulates gas flux according to total mass of procast bodies, largely reducing consumption of carbon source gas and cost.

Description

technical field [0001] The invention relates to a method for preparing an aircraft carbon brake disc, in particular to a method for preparing an aircraft carbon brake disc by using slit directional flow. Background technique [0002] Chinese Patent Publication No. CN 1350959A, date of publication is May 29, 2002, titled "Rapid Vapor-Phase Carbon Precipitation Method and Equipment for Aircraft Carbon Brake Discs" discloses a method for preparing aircraft carbon brake discs using an internal heat gradient directional flow CVI process , the method is to stack the prefabricated carbon discs into the furnace, the carbon source gas enters from the outer low temperature surface of the preform, and is drawn out of the furnace from the inner high temperature surface through the pores in the preform. This method is a rapid gas-phase carbon precipitation process. Although it has the characteristics of adapting to the structure of various types of aircraft carbon brake discs, its disadv...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F16D69/00
Inventor 苏君明肖志超孟凡才王明存向嵛
Owner XIAN CHAOMA SCI TECH
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