CN101831623B - Chemical vapor densification furnace hearth - Google Patents
Chemical vapor densification furnace hearth Download PDFInfo
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- CN101831623B CN101831623B CN2010101877385A CN201010187738A CN101831623B CN 101831623 B CN101831623 B CN 101831623B CN 2010101877385 A CN2010101877385 A CN 2010101877385A CN 201010187738 A CN201010187738 A CN 201010187738A CN 101831623 B CN101831623 B CN 101831623B
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- heating element
- heat
- chemical vapor
- preservation cylinder
- furnace hearth
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Abstract
The invention discloses a chemical vapor densification furnace hearth which has higher space utilization rate. The chemical vapor densification furnace hearth comprises a heat preservation cylinder (6), and the heat preservation cylinder (6) is internally provided with a heating element (2). The chemical vapor densification furnace hearth is characterized in that a space for placing at least one workpiece to be processed is arranged between the inner wall of the heat preservation cylinder (6) and the outer wall of the heating element (2), and the inner wall of the heat preservation cylinder (6) and the outer wall of the heating element (2) keeps a distance of 80-300 mm. The chemical vapor densification furnace hearth has simple structure and effectively increased space utilization rate, improves the production rate of the densification furnace, reduces the damage of the heat radiation to the inner wall of the fire-resistant heat-preserving cylinder, prolongs the service life of the fire-resistant heat-preserving cylinder, ensures that the workpiece to be processed has the function of the fire-resistant heat-preserving cylinder, and decreases the energy consumption.
Description
Technical field:
The present invention relates to a kind of chemical vapor densification furnace, specifically a kind of chemical vapor densification furnace hearth.
Background technology:
Carbon/carbon compound material is a kind of novel material, is made up of the carbon fiber reinforced carbon matrix body, and it is low to have density, the specific tenacity height, and premium propertiess such as wear-resistant corrosion-resistant and high-temperature resistant, increasingly extensive in the application in fields such as aerospace, powder metallurgy and sun power.This novel material is made skeleton with carbon fiber earlier usually, then it is put in the densifier that feeds carbon-source gas, carbon-source gas cracking at high temperature produces RESEARCH OF PYROCARBON, and skeleton is carried out the chemical gas phase density, the carbon fiber skeletal density is progressively increased and becomes carbon/carbon compound material.At present, densifier is generally round vertical heater, and its heating element also is a round shape, and heating element is positioned among the fire resistant heat preserving tube, and spacing is generally 50mm between heating element outer wall and the fire resistant heat preserving tube inwall, and workpiece is put in the middle of the heating element.During densifier work, mainly the thermal radiation by the heating element emission produces heat, keeps furnace high-temperature, to finish the density process.Because it is too little between heating element outer wall and the fire resistant heat preserving tube inwall because of spacing, this space is the part of not knocking off, the thermal radiation direct radiation of the outer wall emission of heating element is to fire resistant heat preserving tube inwall, can not effectively utilize, cause densifier thermo-efficiency not high, again fire resistant heat preserving tube inwall is caused damage, influence its result of use and life-span.In addition, when the round piece size of need processing and heating element dimensions, then need use the densifier of another large-size.
Summary of the invention:
The purpose of this invention is to provide a kind of chemical vapor densification furnace hearth that improves the furnace cavity utilization ratio.
The present invention adopts following technical scheme to realize its goal of the invention, a kind of chemical vapor densification furnace hearth, it comprises heat-preservation cylinder, be provided with heating element in the heat-preservation cylinder, between heat-preservation cylinder inwall and heating element outer wall, be provided with the space that to place workpiece to be processed, be placed with a workpiece to be processed in the described space at least.
A kind of realization is the described chemical vapor densification furnace hearth of method as above, and it comprises heat-preservation cylinder, is provided with heating element in the heat-preservation cylinder, and the spacing between heat-preservation cylinder inwall and the heating element outer wall is 80mm～300mm.
The present invention is the heat insulation effect of raising heat-preservation cylinder, and enough intensity is arranged again, and described heat-preservation cylinder comprises nexine and top layer, and the apparent density of nexine is 1.2g/cm
3～1.7g/cm
3, the apparent density on top layer is 0.4g/cm
3～0.9g/cm
3
Heat-preservation cylinder of the present invention and heating element are round shape.
Heating element of the present invention is made by graphite or carbon/carbon compound material.
Because adopt technique scheme, the present invention has realized goal of the invention preferably, it is simple in structure, has effectively increased the furnace cavity utilization ratio, has improved densifier productivity; Reduced the infringement of thermal radiation, prolonged the work-ing life of fire resistant heat preserving tube, and workpiece to be machined also can play the effect of fire resistant heat preserving tube, reduce energy consumption fire resistant heat preserving tube inwall.
Description of drawings:
Fig. 1 is the prior art constructions synoptic diagram;
Fig. 2 is a structural representation of the present invention.
Embodiment:
The invention will be further described below in conjunction with accompanying drawing.
As shown in Figure 1, its burner hearth of round vertical densifier commonly used at present comprises fire resistant heat preserving tube 6 and round shape heating element 2 thereof.Less because of spacing between heating element 2 outer walls and fire resistant heat preserving tube 6 inwalls, only put workpiece 1 among the heating element 2 during work.
As shown in Figure 2, a kind of chemical vapor densification furnace hearth, it comprises heat-preservation cylinder 6, be provided with heating element 2 in the heat-preservation cylinder 6, between heat-preservation cylinder 6 inwalls and heating element 2 outer walls, be provided with the space that to place workpiece to be processed, be placed with a workpiece to be processed (present embodiment is a workpiece) in the described space at least.
A kind of realization is the described chemical vapor densification furnace hearth of method as above, and it comprises heat-preservation cylinder 6, is provided with heating element 2 in the heat-preservation cylinder 6, and the spacing between heat-preservation cylinder 6 inwalls and heating element 2 outer walls is 80mm～300mm (present embodiment is 100mm).
The present invention is the heat insulation effect of raising heat-preservation cylinder, and enough intensity is arranged again, and described heat-preservation cylinder 6 comprises nexine 4 and top layer 5, and described nexine 4 is near heating elements 2, and the apparent density of nexine 4 is 1.2g/cm
3～1.7g/cm
3(present embodiment is 1.5g/cm
3), the apparent density on top layer 5 is 0.4g/cm
3～0.9g/cm
3(present embodiment is 0.5g/cm
3).
Heat-preservation cylinder 6 of the present invention is round shape with heating element 2.
The present invention is owing to the spacing that has strengthened between heating element 2 outer walls and fire resistant heat preserving tube 6 inwalls, among heating element 2, put the workpiece 1 during work, space between heating element 2 outer walls and fire resistant heat preserving tube 6 inwalls also can be put cylindrical workpiece 3 (or other workpiece) simultaneously, effectively increase the furnace cavity utilization ratio, improved densifier productivity; Reduced the infringement of thermal radiation, prolonged the work-ing life of fire resistant heat preserving tube 6, and processed cylindrical workpiece 3 also can play the effect of fire resistant heat preserving tube, reduce energy consumption fire resistant heat preserving tube 6 inwalls.
Simultaneously, when cylindrical workpiece 3 is heat-preservation cylinder, because, cylindrical workpiece 3 is low near the temperature of close relatively heating element 2 outer walls one side of temperature of fire resistant heat preserving tube 6 inwalls one side, therefore, when density, be more prone to make cylindrical workpiece 3 (being heat-preservation cylinder) to produce the density gradient structure, make heat-preservation cylinder not only have enough intensity but also have heat-insulating property preferably.
The shape of the shape of heating element 2 of the present invention and fire resistant heat preserving tube 6 can also be combinations such as square or square and circular or circular and square.
Claims (4)
1. chemical vapor densification furnace hearth, it comprises heat-preservation cylinder (6), be provided with heating element (2) in the heat-preservation cylinder (6), it is characterized in that the spacing between heat-preservation cylinder (6) inwall and heating element (2) outer wall is 80mm～300mm, form the space that to place workpiece to be processed, be placed with a workpiece to be processed in the described space at least.
2. chemical vapor densification furnace hearth according to claim 1 is characterized in that described heat-preservation cylinder (6) comprises nexine (4) and top layer (5), and the apparent density of nexine (4) is 1.2g/cm
3～1.7g/cm
3, the apparent density of top layer (5) is 0.4g/cm
3～0.9g/cm
3
3. chemical vapor densification furnace hearth according to claim 1 is characterized in that described heat-preservation cylinder (6) and heating element (2) are round shape.
4. according to claim 1 or 2 or 3 described chemical vapor densification furnace hearths, it is characterized in that described heating element (2) made by graphite or carbon/carbon compound material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101877385A CN101831623B (en) | 2010-05-28 | 2010-05-28 | Chemical vapor densification furnace hearth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101877385A CN101831623B (en) | 2010-05-28 | 2010-05-28 | Chemical vapor densification furnace hearth |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101831623A CN101831623A (en) | 2010-09-15 |
| CN101831623B true CN101831623B (en) | 2011-12-07 |
Family
ID=42715842
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101877385A Active CN101831623B (en) | 2010-05-28 | 2010-05-28 | Chemical vapor densification furnace hearth |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101831623B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108060409B (en) * | 2017-12-11 | 2020-02-21 | 湖南顶立科技有限公司 | Deposition chamber and chemical vapor deposition system suitable for annular workpiece |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5480678A (en) * | 1994-11-16 | 1996-01-02 | The B. F. Goodrich Company | Apparatus for use with CVI/CVD processes |
| CN1242090C (en) * | 2003-11-24 | 2006-02-15 | 西安航天复合材料研究所 | Carbon brake disc negative pressure directional flow outward thermal gradient chemical gas phase penetration process and apparatus |
| CN101130859B (en) * | 2007-05-23 | 2010-05-19 | 西安超码科技有限公司 | Resistor external-heating type thermal gradient vapor phase carbon depositing device for airplane carbon brake disc densification technique |
-
2010
- 2010-05-28 CN CN2010101877385A patent/CN101831623B/en active Active
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| Publication number | Publication date |
|---|---|
| CN101831623A (en) | 2010-09-15 |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: 413000 Hunan province Yiyang Yingbin Road No. 2 Patentee after: Hunan gold carbon Limited by Share Ltd Address before: 413000 Hunan province Yiyang Yingbin Road No. 2 Patentee before: Hunan KBCarbon Composite Science and Technology Co., Ltd. |