CN114183685B - Bearing type heat insulation supporting structure of low-temperature storage box - Google Patents
Bearing type heat insulation supporting structure of low-temperature storage box Download PDFInfo
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- CN114183685B CN114183685B CN202111242850.9A CN202111242850A CN114183685B CN 114183685 B CN114183685 B CN 114183685B CN 202111242850 A CN202111242850 A CN 202111242850A CN 114183685 B CN114183685 B CN 114183685B
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- heat insulation
- honeycomb
- bearing
- layer
- support structure
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- 238000009413 insulation Methods 0.000 title claims abstract description 63
- 239000010410 layer Substances 0.000 claims abstract description 59
- 239000011241 protective layer Substances 0.000 claims abstract description 17
- 241000264877 Hippospongia communis Species 0.000 claims description 77
- 229920005830 Polyurethane Foam Polymers 0.000 claims description 8
- 239000011496 polyurethane foam Substances 0.000 claims description 8
- 239000002131 composite material Substances 0.000 claims description 7
- 239000011248 coating agent Substances 0.000 claims description 6
- 238000000576 coating method Methods 0.000 claims description 6
- 229920002379 silicone rubber Polymers 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 4
- 229920003023 plastic Polymers 0.000 claims description 4
- 239000004033 plastic Substances 0.000 claims description 4
- 238000002310 reflectometry Methods 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 239000003365 glass fiber Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 description 5
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 2
- 239000011152 fibreglass Substances 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N phenol group Chemical group C1(=CC=CC=C1)O ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 125000004435 hydrogen atom Chemical class [H]* 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000003380 propellant Substances 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/12—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge with provision for thermal insulation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C1/00—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge
- F17C1/02—Pressure vessels, e.g. gas cylinder, gas tank, replaceable cartridge involving reinforcing arrangements
- F17C1/04—Protecting sheathings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/01—Shape
- F17C2201/0104—Shape cylindrical
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2201/00—Vessel construction, in particular geometry, arrangement or size
- F17C2201/03—Orientation
- F17C2201/035—Orientation with substantially horizontal main axis
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17C—VESSELS FOR CONTAINING OR STORING COMPRESSED, LIQUEFIED OR SOLIDIFIED GASES; FIXED-CAPACITY GAS-HOLDERS; FILLING VESSELS WITH, OR DISCHARGING FROM VESSELS, COMPRESSED, LIQUEFIED, OR SOLIDIFIED GASES
- F17C2203/00—Vessel construction, in particular walls or details thereof
- F17C2203/03—Thermal insulations
- F17C2203/0304—Thermal insulations by solid means
- F17C2203/0329—Foam
- F17C2203/0333—Polyurethane
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a bearing type heat insulation supporting structure of a low-temperature storage box, which comprises the following components: a protective layer, a heat insulation bearing layer and a buffer layer; wherein the protective layer is connected with the heat insulation bearing layer; the heat insulation bearing layer is connected with the buffer layer; the buffer layer is connected with one end of the low-temperature storage box. The invention can bear larger normal load and has better heat insulation capacity.
Description
Technical Field
The invention belongs to the technical field of repeated use of reciprocating from top to bottom, and particularly relates to a bearing type heat insulation supporting structure of a low-temperature storage box.
Background
The carrier for repeatedly use in the back and forth direction generally adopts an inner layer and an outer layer, wherein the inner layer is a storage tank, and the outer layer is an aircraft structure. Unlike conventional rocket tanks which are mainly subjected to axial loads, the repeatedly used carrier tanks are subjected to axial loads and normal overload in the flight process, which puts high demands on the normal bearing capacity of the tanks, particularly the connection parts of the tanks. At present, the storage tank is connected in a flange or pull rod mode, and structures such as a connecting flange or a connecting lug are required to be arranged on the storage tank, so that the structure of the connecting part of the storage tank is complex and the weight is increased.
The new generation rocket engine adopts liquid hydrogen, liquid oxygen, methane and other low temperature propellant, and has high heat insulating requirement to the storage tank and its connection part in the allowed use temperature range. The traditional storage tank is mostly insulated by adopting foaming materials, and has better heat insulation effect but no bearing capacity.
Disclosure of Invention
The invention solves the technical problems that: the utility model provides a bearing type heat insulation supporting structure of a low temperature storage box, which overcomes the defects of the prior art, can bear larger normal load, has better heat insulation capacity, has simple and reliable manufacturing scheme and strong universality, and is very suitable for the storage box connection form which adopts low temperature power and needs normal support.
The invention aims at realizing the following technical scheme: a load-bearing thermally insulating support structure for a cryogenic tank comprising: a protective layer, a heat insulation bearing layer and a buffer layer; wherein the protective layer is connected with the heat insulation bearing layer; the heat insulation bearing layer is connected with the buffer layer; the buffer layer is connected with one end of the low-temperature storage box.
In the bearing type heat insulation supporting structure of the low-temperature storage tank, the protective layer is made of glass fiber cloth, the thickness h1=0.2 mm, and the protective layer is coated on the heat insulation bearing layer through low-temperature silicon rubber.
In the bearing type heat insulation supporting structure of the low-temperature storage tank, the outer surface of the protective layer is provided with a waterproof coating and a high-reflectivity coating.
In the bearing type heat insulation supporting structure of the low-temperature storage tank, the heat insulation bearing layer comprises a honeycomb sandwich, a T300 composite material panel and polyurethane foam plastic; wherein, the outer surface of the honeycomb sandwich is provided with a T300 composite panel; the polyurethane foam (filled in the honeycomb sandwich, wherein the honeycomb sandwich is formed by connecting a plurality of honeycombs, and the cross section of each honeycomb is in an equilateral hexagon shape.
In the bearing type heat insulation support structure of the low-temperature storage tank, the thickness of the bearing type heat insulation support structure is obtained by the following formula:
wherein h is the thickness of the bearing type heat insulation supporting structure, T1 is the outer layer temperature of the bearing type heat insulation supporting structure, T2 is the inner layer temperature of the bearing type heat insulation supporting structure, S is the side length of the honeycomb, T is the wall thickness of the honeycomb, D is the diameter of the storage tank, L is the width of the heat insulation layer, and C is a constant.
In the bearing type heat insulation supporting structure of the low-temperature storage tank, the equivalent density of the honeycomb sandwich is obtained by the following formula:
wherein ρ is c Is the equivalent density of the honeycomb sandwich, ρ s The density of the honeycomb sandwich is that S is the honeycomb side length, and t is the honeycomb wall thickness.
In the bearing type heat insulation supporting structure of the low-temperature storage tank, the compressive strength of the honeycomb sandwich is obtained by the following formula:
wherein sigma c Is the compressive strength of the honeycomb sandwich, sigma S Compressive Strength of the honeycomb Sandwich, E S The compression elastic modulus of the honeycomb sandwich is S, the honeycomb side length is t, the honeycomb wall thickness is t, and K is a constant.
In the bearing type heat insulation supporting structure of the low-temperature storage tank, the thickness of the buffer layer is 2-3mm.
In the bearing type heat insulation supporting structure of the low-temperature storage tank, the honeycomb side length is 5-10mm.
In the bearing type heat insulation supporting structure of the low-temperature storage tank, the wall thickness of the honeycomb is 0.1-0.3mm.
Compared with the prior art, the invention has the following beneficial effects:
(1) The invention provides a low Wen Zhuxiang heat insulation supporting structure which connects a storage tank in a supporting mode;
(2) The low Wen Zhuxiang heat insulation support structure provided by the invention can not only effectively insulate heat, but also bear larger normal load.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to designate like parts throughout the figures. In the drawings:
FIG. 1 is a schematic illustration of the connection of an insulated support structure to a storage tank provided in an embodiment of the invention;
FIG. 2 is a cross-sectional view of an insulating support structure provided by an embodiment of the present invention;
fig. 3 is a schematic view of an insulating carrier layer according to an embodiment of the present invention.
Detailed Description
Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
FIG. 1 is a schematic illustration of the connection of an insulated support structure to a storage tank provided in an embodiment of the invention; fig. 2 is a cross-sectional view of an insulating support structure provided by an embodiment of the present invention. As shown in fig. 1 and 2, the load-bearing adiabatic support structure of the cryogenic tank includes: a protective layer 1, a heat insulation bearing layer 2 and a buffer layer 3; wherein the protective layer 1 is connected with the heat insulation bearing layer 2; the heat insulating carrier layer 2 is connected with the buffer layer 3. One end of the low-temperature storage tank is provided with a short shell and is connected with the outer layer structure through bolts, and the other end of the low-temperature storage tank is connected with the outer layer structure through a supporting structure.
The outermost layer of the heat insulation supporting structure is a protective layer 1, the protective layer is 1 layer of glass fiber cloth, the thickness h1=0.2 mm, the heat insulation supporting layer 2 is coated with low-temperature silicon rubber, the waterproof coating and the high-reflectivity coating are brushed on the outermost layer, and the waterproof performance and the heat reflectivity of the supporting structure are improved.
As shown in fig. 3, the insulating carrier layer 2 comprises a honeycomb sandwich, a T300 composite panel 4 and a polyurethane foam 5; wherein the outer surface of the honeycomb sandwich is provided with a T300 composite panel 4; the polyurethane foam 5 is filled in the honeycomb sandwich; the honeycomb sandwich is formed by connecting a plurality of honeycombs, wherein the cross section of each honeycomb is of an equilateral hexagon.
The middle layer is a heat insulation bearing layer 2, the main structure is a honeycomb sandwich structure, the honeycomb material is phenolic glass fiber reinforced plastic, the structure is an equilateral hexagon, and the equivalent density of the honeycomb structure is ρ c The side length of the honeycomb is S, and the wall thickness of the honeycomb is t; the outermost layer of the honeycomb is of a T300 composite material panel 4 structure, the thickness of the panel is 1.5mm, the panel and the honeycomb structure are bonded through low-temperature glue, and the honeycomb and the panel mainly play a bearing role. The honeycomb structure is filled with polyurethane foam 5 with low thermal conductivity, so that the heat insulation performance of the whole structure is improved.
The thickness of the insulating support structure can be calculated using the following formula
Wherein h is the thickness of the heat insulation supporting structure, T1 is the temperature of the outer layer of the heat insulation supporting structure, T2 is the temperature of the inner layer of the heat insulation supporting structure, S is the side length of the honeycomb and is generally 5-10mm, T is the wall thickness of the honeycomb and is generally 0.1-0.3mm, D is the diameter of the storage tank, L is the width of the heat insulation layer, C is a constant, and the liquid oxygen storage tank is 66.5.
The formula of the thickness of the heat insulation supporting structure enables the heat insulation supporting structure to further bear larger normal load and have better heat insulation capacity.
The equivalent density of the honeycomb structure can be calculated using the following formula
Wherein ρ is c Is the equivalent density of the honeycomb structure ρ s For the density of the honeycomb material, S is the side length of the honeycomb and is generally 5-10mm, and t is the wall thickness of the honeycomb and is generally 0.1-0.3mm.
The formula of the equivalent density of the honeycomb structure enables the honeycomb structure to further bear larger normal load and have better heat insulation capacity.
The compressive strength of the honeycomb structure can be calculated by the following formula
Wherein sigma c Is the compressive strength of the honeycomb structure, sigma s For the compressive strength of honeycomb material, E s The compression elastic modulus of the honeycomb material is that S is the honeycomb side length and is generally 5-10mm, t is the honeycomb wall thickness and is generally 0.1-0.3mm, K is a constant, and the phenolic glass fiber reinforced plastic is 31.6.
The formula of the compressive strength of the honeycomb structure enables the honeycomb structure to further bear larger normal load and have better heat insulation capacity.
The buffer layer 3 mainly plays a role in connection and protection, generally adopts low-temperature silicon rubber to coat the part of the storage tank, which needs to be subjected to heat insulation support, has the thickness of h2=2-3 mm, plays a role in connecting the storage tank and the heat insulation bearing layer 2, plays a role in deformation coordination, and avoids structural damage caused by inconsistent low-temperature deformation and honeycomb deformation of the storage tank.
The buffer layer mainly plays a role in connection and protection, and is generally coated on a part of the storage tank, which needs to be thermally insulated and supported, by adopting low-temperature silicon rubber; the heat insulation bearing layer is a core of the whole structure and plays a role in heat insulation and bearing, and in the invention, the skeleton of the heat insulation bearing layer is of a honeycomb structure and plays a role in bearing mainly; filling polyurethane foam plastic with low heat conductivity in the honeycomb structure, and mainly playing a role of heat insulation; the outermost layer is a protective layer and mainly comprises low-temperature glue and glass cloth.
The heat-insulating supporting structure provided by the invention can bear larger normal load, has better heat insulating capacity, has simple and reliable manufacturing scheme and strong universality, and is very suitable for a storage tank connection form which adopts low-temperature power and needs normal support.
Although the present invention has been described in terms of the preferred embodiments, it is not intended to be limited to the embodiments, and any person skilled in the art can make any possible variations and modifications to the technical solution of the present invention by using the methods and technical matters disclosed above without departing from the spirit and scope of the present invention, so any simple modifications, equivalent variations and modifications to the embodiments described above according to the technical matters of the present invention are within the scope of the technical matters of the present invention.
Claims (8)
1. A load-bearing thermally insulating support structure for a cryogenic tank comprising: a protective layer (1), a heat insulation bearing layer (2) and a buffer layer (3); wherein,
the protective layer (1) is connected with the heat insulation bearing layer (2);
the heat insulation bearing layer (2) is connected with the buffer layer (3);
the buffer layer (3) is connected with one end of the low-temperature storage box;
the heat insulation bearing layer (2) comprises a honeycomb sandwich, a T300 composite material panel (4) and polyurethane foam plastics (5); wherein,
the outer surface of the honeycomb sandwich is provided with a T300 composite panel (4);
the polyurethane foam plastic (5) is filled in the honeycomb sandwich;
the honeycomb sandwich is formed by connecting a plurality of honeycombs, wherein the cross section of each honeycomb is in an equilateral hexagon shape;
the thickness of the bearing type heat insulation supporting structure is obtained by the following formula:
wherein h is the thickness of the bearing type heat insulation supporting structure, T1 is the outer layer temperature of the bearing type heat insulation supporting structure, T2 is the inner layer temperature of the bearing type heat insulation supporting structure, S is the side length of the honeycomb, T is the wall thickness of the honeycomb, D is the diameter of the storage tank, L is the width of the heat insulation layer, and C is a constant.
2. The cryogenic tank load-bearing thermally insulating support structure of claim 1, wherein: the protective layer (1) is made of glass fiber cloth, the thickness h1=0.2 mm, and the protective layer (1) is coated on the heat insulation bearing layer (2) through low-temperature silicon rubber.
3. The cryogenic tank load-bearing thermally insulating support structure of claim 1, wherein: the outer surface of the protective layer (1) is provided with a waterproof coating and a high-reflectivity coating.
4. The cryogenic tank load-bearing thermally insulating support structure of claim 1, wherein: the equivalent density of the honeycomb sandwich is obtained by the following formula:
wherein ρ is c Is the equivalent density of the honeycomb sandwich, ρ s The density of the honeycomb sandwich is that S is the honeycomb side length, and t is the honeycomb wall thickness.
5. The cryogenic tank load-bearing thermally insulating support structure of claim 1, wherein: the compressive strength of the honeycomb sandwich is obtained by the following formula:
wherein sigma c Is the compressive strength of the honeycomb sandwich, sigma S Compressive Strength of the honeycomb Sandwich, E S The compression elastic modulus of the honeycomb sandwich is S, the honeycomb side length is t, the honeycomb wall thickness is t, and K is a constant.
6. The cryogenic tank load-bearing thermally insulating support structure of claim 1, wherein: the thickness of the buffer layer (3) is 2-3mm.
7. The cryogenic tank load-bearing thermally insulating support structure of claim 1, wherein: the honeycomb side length is 5-10mm.
8. The cryogenic tank load-bearing thermally insulating support structure of claim 1, wherein: the honeycomb wall thickness is 0.1-0.3mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111242850.9A CN114183685B (en) | 2021-10-25 | 2021-10-25 | Bearing type heat insulation supporting structure of low-temperature storage box |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111242850.9A CN114183685B (en) | 2021-10-25 | 2021-10-25 | Bearing type heat insulation supporting structure of low-temperature storage box |
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| Publication Number | Publication Date |
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| CN114183685A CN114183685A (en) | 2022-03-15 |
| CN114183685B true CN114183685B (en) | 2023-12-12 |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN115750142A (en) * | 2022-10-31 | 2023-03-07 | 北京九天行歌航天科技有限公司 | Rocket low-temperature storage tank common-bottom heat insulation structure and processing method thereof |
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| CN114183685A (en) | 2022-03-15 |
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