CN114348292A - Wide-temperature-range wind load-resistant heat insulation system for airplane test - Google Patents
Wide-temperature-range wind load-resistant heat insulation system for airplane test Download PDFInfo
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- CN114348292A CN114348292A CN202111645494.5A CN202111645494A CN114348292A CN 114348292 A CN114348292 A CN 114348292A CN 202111645494 A CN202111645494 A CN 202111645494A CN 114348292 A CN114348292 A CN 114348292A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention relates to the technical field of airplane testing, in particular to a wide-temperature-range wind load-resistant heat insulation system for airplane testing and a parameter optimization method thereof, wherein the heat insulation system comprises a door rail structure pre-embedded on the inner wall of a door opening, a wind pressure-resistant door body movably arranged on the door rail structure and a sealing system arranged on the wind pressure-resistant door body; the door rail structure comprises a lower door rail horizontally embedded at the lower end of the inner wall of the door opening; an upper door rail which is horizontally pre-embedded at the upper end of the inner wall of the door opening and corresponds to the lower door rail up and down; s1, determining the sizes of the upper door rail and the lower door rail; s2, determining the specific number of wind pressure resistant door leaves according to the statics simulation; s3, determining the model of the central door rail; s4, determining the covering thickness of the polyurethane sandwich layer and the rock wool sandwich layer; the wide-temperature-range wind load-resistant heat-insulation system provided by the invention has the advantages of strong wind pressure resistance, simplicity and convenience in operation and high reliability.
Description
Technical Field
The invention relates to the technical field of airplane testing, in particular to a wide-temperature-range wind load resistant heat preservation system for airplane testing.
Background
The climate test of the aircraft in the aircraft test engineering is an important ring, and the main purpose of the climate test is to evaluate the effectiveness of each system of the aircraft under various extreme climate environmental conditions and estimate the risk level that the aircraft may bear; the initial stage of the flight test under the extreme climatic environment condition is completed in a climatic environment laboratory, the problem area can be rapidly found out by performing the test under the controllable environment condition, and the problem of flight safety is solved as far as possible.
The airplane climate environment laboratory has the capability of carrying out typical climate tests such as high temperature, low temperature, solar radiation, damp and hot, rain, fog, snow, ice and freezing rain, wind and snow and the like on a large airplane, and the laboratory needs to simulate a temperature environment of-55-70 ℃, so that the wind load resistant design parameters such as the body form coefficient, the wind pressure height variation coefficient, the wind array coefficient and the like of a wind load need to be considered in the design process of the climate environment laboratory door body heat insulation system, except for the factors such as gravity and the like, and the structural strength, the rigidity and the stability of the door body meet the national standard requirements.
After the rigidity requirement is met, in order to prevent indoor heat from leaking within a wide temperature range and to prevent the deviation of the laboratory environment temperature and temperature tolerance from the test requirement, the sealing performance of the door body heat insulation system is further improved. In the processes of overall scheme design, material selection, processing, construction and the like, the problem of overall structure deformation of the door body heat insulation system also needs to be considered, the flatness of the door body heat insulation system after installation is ensured, and the operability of the door in the operation process is facilitated.
At present, no mature test technology can be used for reference in China for the large-scale wind load-resistant heat-insulation system with wide temperature range.
Disclosure of Invention
The technical problem solved by the invention is as follows: the wind load-resistant heat preservation system with the wind pressure resistance and the wide temperature range and the parameter optimization method thereof have the advantages of strong wind pressure resistance, capability of ensuring flatness and convenience in operation.
The technical scheme of the invention is as follows: a wide-temperature-range wind load-resistant heat insulation system for an airplane test comprises a door rail structure pre-embedded on the inner wall of a door opening, a wind pressure-resistant door body movably arranged on the door rail structure, and a sealing system arranged on the wind pressure-resistant door body;
the door rail structure comprises a lower door rail horizontally embedded at the lower end of the inner wall of the door opening; an upper door rail which is horizontally pre-embedded at the upper end of the inner wall of the door opening and corresponds to the lower door rail up and down;
the lower door rail comprises an embedded plate, a central door rail arranged on the embedded plate, and door separating rails arranged on the embedded plate and positioned at two sides of the central door rail;
the wind pressure resisting door body comprises 3-8 wind pressure resisting door leaves with the same size, an upper end guide wheel which is arranged at the upper end of the wind pressure resisting door leaf and movably connected with the upper door rail, and a bearing wheel mechanism which is arranged at the lower end of the wind pressure resisting door leaf and movably connected with the central door rail and the branch door rails;
the wind pressure resistant door leaf comprises a door leaf bottom beam connected with the bearing wheel mechanism, a door leaf top beam connected with an upper end guide wheel, and a main body frame arranged between the door leaf bottom beam and the door leaf top beam;
the center of the wind pressure resistant door leaf is provided with a central rotating shaft which penetrates from top to bottom; the upper end of the central rotating shaft is connected with the upper end guide wheel, and the lower end of the central rotating shaft is connected with the bearing wheel mechanism;
the bearing wheel mechanism comprises a bearing bridge plate, a first bearing wheel and a second bearing wheel, wherein the middle part of the bearing bridge plate is connected with the central rotating shaft;
the first bearing wheel is connected with the central door rail; the second bearing wheel is connected with the door separating rail;
the lower end of the door leaf bottom beam is also uniformly provided with third bearing wheels connected with the central door rail; a bearing wheel rotation inlet is formed in the central door rail; and a blocking piece is arranged on the bearing wheel rotation inlet.
Furthermore, driving devices are arranged on the second bearing wheel and the upper end guide wheel; the driving device is a motor, can realize the electric control of the wind pressure resisting door body, and is convenient for controlling the opening and closing of the wind pressure resisting door body.
Furthermore, the main body framework comprises an inner panel and an outer panel which are respectively positioned indoors and outdoors, a top wind rib plate which is uniformly distributed between the inner panel and the outer panel to form a plurality of rectangular spaces, and an inclined strut triangular partition plate which is obliquely inserted in the rectangular spaces;
the inclined strut triangular partition plate is in a corrugated shape, and corners of the corrugated shape are intersected with the end parts of the top wind rib plates;
the wind pressure resistance of a single door leaf can be effectively improved by arranging the wind-resisting rib plates, and the overall strength is effectively improved; the corrugated inclined strut triangular partition plate can further enhance the strength and wind pressure resistance of the door body.
Further, the rectangular space is filled with a heat insulation material; the weight of the door body can be reduced on one hand by filling the heat insulation material, and on the other hand, the heat insulation performance of the door body can be enhanced.
Furthermore, X-shaped reinforcing members are fixed on the inner panel and the outer panel; the X-shaped reinforcing piece is two reinforcing rods which are arranged in a crossed mode, and the reinforcing rods are located on the diagonal line of the wind pressure resisting door leaf 4 and are connected with the inner panel and the outer panel through bolts; the setting of X type reinforcement can further strengthen a body rigidity intensity from the outside, promotes the anti wind-load ability of a body under the condition of inside and outside difference in temperature increase.
Further, the X-shaped reinforcing piece of the inner panel is covered with a polyurethane sandwich layer;
the X-shaped reinforcing member of the outer panel is covered with a rock wool sandwich layer; the heat preservation performance of the wind pressure resisting door leaf is enhanced through the arrangement of the polyurethane sandwich layer and the rock wool sandwich layer, and the cold bridge phenomenon generated on the inner panel and the outer panel is effectively avoided.
Furthermore, the side surface of the wind pressure resistant door leaf is provided with an inner hook which can be connected with each other; the inner hook can effectively connect adjacent wind pressure resistant door leaves to form complete sealing on the door opening of the climate laboratory; the wind pressure resistant door leaves are locked on the door rail structure by adopting the inner hook, so that the flatness of the complete door body is ensured, and the wind load is improved.
Furthermore, the pre-buried depth of the pre-buried plate is 0.6-1.2 m, and the pre-buried plate is provided with an ice melting system; effectively guarantee that the lower door rail on the pre-buried board does not freeze.
Furthermore, the sealing system comprises an ethylene propylene diene monomer rubber sealing element arranged around the wind pressure resistant door leaf, a sealant used for connecting the ethylene propylene diene monomer rubber sealing element, and an inflatable sealing structure arranged around the wind pressure resistant door leaf;
the inflatable sealing structure comprises a sealing air cushion arranged around the wind pressure resistant door leaf, a nitrogen making system air storage tank communicated with the sealing air cushion through an inflation pipe, and a pressure regulating valve arranged on the nitrogen making system air storage tank; the periphery of the wind pressure resisting door leaf can be sealed at 15 KPa-25 KPa by the arrangement of the inflatable sealing structure; effectively promote the sealing performance of the whole wind pressure resistant door body.
The parameter optimization method of the wide-temperature-range wind load resistant heat preservation system for the airplane test comprises the following steps:
s1, firstly, determining the lengths of the upper door rail and the lower door rail and the height difference between the upper door rail and the lower door rail according to the size of the inner wall of the door opening; wherein the lengths of the upper door rail and the lower door rail are both 60-80 m; the height difference is 18-20 m;
s2, establishing a static simulation model according to the length and the height of the door rail structure, dividing grids, and applying a target load; the target load is 800-850N/m2；
Then determining the specific number of wind pressure resistant door leaves and the thicknesses of the inner panel, the outer panel and the top wind rib plate according to the stress cloud picture; the specific number of the wind pressure resistant door leaves is 3-8; the thickness of the inner panel and the outer panel is 3-6 mm; the thickness of the top air rib plate is 1.5-3 mm;
s3, determining the model of the central door rail according to the data of the step S2;
s4, determining the thickness of the polyurethane sandwich layer covered on the inner panel and determining the thickness of the rock wool sandwich layer covered on the outer panel.
The invention has the beneficial effects that: the invention provides a wide-temperature-range wind load-resistant heat preservation system for an aircraft test and a parameter optimization method thereof, wherein a plurality of independently moving wind pressure-resistant door leaves are arranged in an aircraft climate laboratory door opening in a module division mode, so that the manufacturing difficulty is greatly reduced, the strength and the flatness of a single wind pressure-resistant door leaf are effectively improved, and the wind load resistance is improved; through the arrangement of the top wind rib plate and the inclined strut triangular partition plateThe wind resistance of the wind pressure resistant door leaf is further improved, and the maximum wind load of the whole door body is 783N/m under the comprehensive working conditions of indoor pressure, inflatable sealing load, locking stress and earthquake load shearing force2(ii) a According to the invention, the linear movement and sliding of the wind pressure resistant door leaf on the lower door rail can be realized through the arrangement of the bearing wheel mechanism, the central rotating shaft and the bearing wheel rotating inlet, the door body is opened and closed by adopting a single linear rule, the operation is simple and convenient, and the reliability is strong.
Drawings
FIG. 1 is a flow chart of a parameter optimization method of the present invention;
FIG. 2 is a schematic structural view of the whole of embodiment 1 of the present invention;
FIG. 3 is a schematic structural view of a load bearing wheel mechanism according to embodiment 1 of the present invention;
FIG. 4 is a schematic view of the structure of the hook in embodiment 1 of the present invention;
FIG. 5 is a schematic structural view of a main body frame in embodiment 2 of the present invention;
FIG. 6 is a schematic structural view of a sealing system according to embodiment 4 of the present invention;
wherein, 1-door rail structure, 10-lower door rail, 11-upper door rail, 100-embedded plate, 101-central door rail, 102-branch door rail, 2-wind pressure resistant door body, 21-upper end guide wheel, 22-bearing wheel mechanism, 220-bearing bridge plate, 221-first bearing wheel, 222-second bearing wheel, 223-third bearing wheel, 224-bearing wheel rotating inlet, 225-baffle, 3-sealing system, 30-ethylene propylene diene monomer sealing element, 31-sealing air cushion, 32-inflation pipe, 33-nitrogen making system air storage tank, 34-pressure regulating valve, 4-wind pressure resistant door leaf, 40-door leaf bottom beam, 41-door leaf top beam, 42-inner panel, 43-outer panel, 44-top wind rib plate, 45-diagonal bracing triangular partition plate, 46-heat insulation material, 47-central rotating shaft, 48-inner hook, 420-polyurethane sandwich layer and 430-rock wool sandwich layer.
Detailed Description
Example 1
As shown in fig. 2, the wide temperature range wind load resistant thermal insulation system for the aircraft test comprises a door rail structure 1 pre-embedded on the inner wall of a door opening, a wind pressure resistant door body 2 movably arranged on the door rail structure 1, and a sealing system 3 arranged on the wind pressure resistant door body 2;
the door rail structure 1 comprises a lower door rail 10 which is horizontally embedded at the lower end of the inner wall of the door opening; an upper door rail 11 which is horizontally pre-embedded at the upper end of the inner wall of the door opening and corresponds to the lower door rail 10 up and down;
the lower door rail 10 comprises an embedded plate 100, a central door rail 101 arranged on the embedded plate 100, and door separating rails 102 arranged on the embedded plate 100 and positioned at two sides of the central door rail 101;
the wind pressure resistant door body 2 comprises 4 wind pressure resistant door leaves 4 with the same size, an upper end guide wheel 21 which is arranged at the upper end of the wind pressure resistant door leaf 4 and movably connected with the upper door rail 11, and a bearing wheel mechanism 22 which is arranged at the lower end of the wind pressure resistant door leaf 4 and movably connected with the central door rail 101 and the door separating rail 102;
the wind pressure resistant door leaf 4 comprises a door leaf bottom beam 40 connected with the bearing wheel mechanism 22, a door leaf top beam 41 connected with the upper end guide wheel 21, and a main body frame arranged between the door leaf bottom beam 40 and the door leaf top beam 41;
the center of the wind pressure resistant door leaf 4 is provided with a central rotating shaft 47 which penetrates from top to bottom; the upper end of the central rotating shaft 47 is connected with the upper end guide wheel 21, and the lower end is connected with the bearing wheel mechanism 22;
as shown in fig. 3, the load-bearing wheel mechanism 22 includes a load-bearing bridge plate 220 connected to the central rotating shaft 47 at the middle portion, a first load-bearing wheel 221 disposed on the load-bearing bridge plate 220 and directly below the central rotating shaft 47, and second load-bearing wheels 222 disposed on the load-bearing bridge plate 220 and located at both sides of the first load-bearing wheel 221;
the first load bearing wheel 221 is connected with the central door rail 101; the second bearing wheel 222 is connected with the door separating rail 102;
the lower end of the door leaf bottom beam 40 is also uniformly provided with a third bearing wheel 223 connected with the central door rail 101; a bearing wheel rotation inlet 224 is formed in the central door rail 101; a baffle 225 is arranged on the load-bearing wheel inlet 224.
The pre-buried depth of the pre-buried plate 100 is 1m, and the ice melting system is arranged.
As shown in fig. 4, the wind pressure resistant door leaf 4 is provided at its side with an inner hook 48 capable of being connected to each other.
And power motors are arranged on the second bearing wheel 222 and the upper end guide wheel 21.
The main body frame is of a conventional truss structure; the sealing system 3 is a rubber edge seal.
The PLC is adopted to control the power motor; the power motor, the ice melting system and the PLC are all products sold in the market, and specific product models can be selected by those skilled in the art according to needs.
The use method of the device comprises the following steps:
the power motor drives the second bearing wheel 222 and the upper end guide wheel 21 to enable the wind pressure resistant door leaf 4 to move on the door rail structure 1, after the wind pressure resistant door leaf 4 reaches a designated position, the wind pressure resistant door leaf 4 rotates around the central rotating shaft 47 to enable the third bearing wheel 223 to enter the central door rail 101 through the bearing wheel rotation inlet 224, and then the blocking piece 225 blocks the bearing wheel rotation inlet 224; the wind pressure resistant door leaf 4 is driven by the power motor to move to a specified position; then the remaining wind pressure resistant door leaves 4 are sequentially subjected to the above operation to seal the laboratory door opening.
Example 2
A wide-temperature-range wind load-resistant heat insulation system for an airplane test comprises a door rail structure 1 pre-embedded on the inner wall of a door opening, a wind pressure resistant door body 2 movably arranged on the door rail structure 1, and a sealing system 3 arranged on the wind pressure resistant door body 2;
the door rail structure 1 comprises a lower door rail 10 which is horizontally embedded at the lower end of the inner wall of the door opening; an upper door rail 11 which is horizontally pre-embedded at the upper end of the inner wall of the door opening and corresponds to the lower door rail 10 up and down;
the lower door rail 10 comprises an embedded plate 100, a central door rail 101 arranged on the embedded plate 100, and door separating rails 102 arranged on the embedded plate 100 and positioned at two sides of the central door rail 101;
the wind pressure resistant door body 2 comprises 5 wind pressure resistant door leaves 4 with the same size, an upper end guide wheel 21 which is arranged at the upper end of the wind pressure resistant door leaf 4 and movably connected with the upper door rail 11, and a bearing wheel mechanism 22 which is arranged at the lower end of the wind pressure resistant door leaf 4 and movably connected with the central door rail 101 and the door separating rail 102;
the wind pressure resistant door leaf 4 comprises a door leaf bottom beam 40 connected with the bearing wheel mechanism 22, a door leaf top beam 41 connected with the upper end guide wheel 21, and a main body frame arranged between the door leaf bottom beam 40 and the door leaf top beam 41;
the center of the wind pressure resistant door leaf 4 is provided with a central rotating shaft 47 which penetrates from top to bottom; the upper end of the central rotating shaft 47 is connected with the upper end guide wheel 21, and the lower end is connected with the bearing wheel mechanism 22;
as shown in fig. 3, the load-bearing wheel mechanism 22 includes a load-bearing bridge plate 220 connected to the central rotating shaft 47 at the middle portion, a first load-bearing wheel 221 disposed on the load-bearing bridge plate 220 and directly below the central rotating shaft 47, and second load-bearing wheels 222 disposed on the load-bearing bridge plate 220 and located at both sides of the first load-bearing wheel 221;
the first load bearing wheel 221 is connected with the central door rail 101; the second bearing wheel 222 is connected with the door separating rail 102;
the lower end of the door leaf bottom beam 40 is also uniformly provided with a third bearing wheel 223 connected with the central door rail 101; a bearing wheel rotation inlet 224 is formed in the central door rail 101; a baffle 225 is arranged on the load-bearing wheel inlet 224.
The pre-buried depth of the pre-buried plate 100 is 1.2m, and the ice melting system is arranged.
The wind pressure resistant door leaf 4 is provided with inner hooks 48 on the side surface.
As shown in fig. 5, the main body frame includes two inner panels 42 and outer panels 43 respectively located inside and outside the room, a roof rib 44 uniformly distributed between the inner panels 42 and the outer panels 43 to form a plurality of rectangular spaces, and a diagonal-bracing triangular partition 45 obliquely inserted into the rectangular spaces;
the inclined strut triangular partition plate 45 is formed into a corrugated shape, and corners of the corrugated shape are intersected with the end parts of the top wind rib plates 44.
The rectangular space is filled with a thermal insulation material 46.
And power motors are arranged on the second bearing wheel 222 and the upper end guide wheel 21.
The sealing system 3 is a rubber edge seal.
The PLC is adopted to control the power motor; the power motor, the ice melting system and the PLC are all products sold in the market, and specific product models can be selected by those skilled in the art according to needs.
Compared with embodiment 1, the present embodiment further enhances the wind load resistance of the wind pressure resistant door leaf 4 by providing the top rib 44 and the inclined triangular partition 45 in the main body frame.
Example 3
A wide-temperature-range wind load-resistant heat insulation system for an airplane test comprises a door rail structure 1 pre-embedded on the inner wall of a door opening, a wind pressure resistant door body 2 movably arranged on the door rail structure 1, and a sealing system 3 arranged on the wind pressure resistant door body 2;
the door rail structure 1 comprises a lower door rail 10 which is horizontally embedded at the lower end of the inner wall of the door opening; an upper door rail 11 which is horizontally pre-embedded at the upper end of the inner wall of the door opening and corresponds to the lower door rail 10 up and down;
the lower door rail 10 comprises an embedded plate 100, a central door rail 101 arranged on the embedded plate 100, and door separating rails 102 arranged on the embedded plate 100 and positioned at two sides of the central door rail 101;
the wind pressure resistant door body 2 comprises 8 wind pressure resistant door leaves 4 with the same size, an upper end guide wheel 21 which is arranged at the upper end of the wind pressure resistant door leaf 4 and movably connected with the upper door rail 11, and a bearing wheel mechanism 22 which is arranged at the lower end of the wind pressure resistant door leaf 4 and movably connected with the central door rail 101 and the door separating rail 102;
the wind pressure resistant door leaf 4 comprises a door leaf bottom beam 40 connected with the bearing wheel mechanism 22, a door leaf top beam 41 connected with the upper end guide wheel 21, and a main body frame arranged between the door leaf bottom beam 40 and the door leaf top beam 41;
the center of the wind pressure resistant door leaf 4 is provided with a central rotating shaft 47 which penetrates from top to bottom; the upper end of the central rotating shaft 47 is connected with the upper end guide wheel 21, and the lower end is connected with the bearing wheel mechanism 22;
as shown in fig. 3, the load-bearing wheel mechanism 22 includes a load-bearing bridge plate 220 connected to the central rotating shaft 47 at the middle portion, a first load-bearing wheel 221 disposed on the load-bearing bridge plate 220 and directly below the central rotating shaft 47, and second load-bearing wheels 222 disposed on the load-bearing bridge plate 220 and located at both sides of the first load-bearing wheel 221;
the first load bearing wheel 221 is connected with the central door rail 101; the second bearing wheel 222 is connected with the door separating rail 102;
the lower end of the door leaf bottom beam 40 is also uniformly provided with a third bearing wheel 223 connected with the central door rail 101; a bearing wheel rotation inlet 224 is formed in the central door rail 101; a baffle 225 is arranged on the load-bearing wheel inlet 224.
The pre-buried depth of the pre-buried plate 100 is 0.6m, and the ice melting system is arranged.
The wind pressure resistant door leaf 4 is provided with inner hooks 48 on the side surface.
As shown in fig. 5, the main body frame includes two inner panels 42 and outer panels 43 respectively located inside and outside the room, a roof rib 44 uniformly distributed between the inner panels 42 and the outer panels 43 to form a plurality of rectangular spaces, and a diagonal-bracing triangular partition 45 obliquely inserted into the rectangular spaces;
the inclined strut triangular partition plate 45 is formed into a corrugated shape, and corners of the corrugated shape are intersected with the end parts of the top wind rib plates 44.
The rectangular space is filled with a thermal insulation material 46.
X-shaped reinforcing members are fixed on the inner panel 42 and the outer panel 43; the X-shaped reinforcing member is two reinforcing rods which are arranged in a crossed mode, are positioned on the diagonal line of the wind pressure resisting door leaf 4 and are connected with the inner panel 42 and the outer panel 43 through bolts.
And power motors are arranged on the second bearing wheel 222 and the upper end guide wheel 21.
The main body frame is of a conventional truss structure; the sealing system 3 is a rubber edge seal.
The PLC is adopted to control the power motor; the power motor, the ice melting system and the PLC are all products sold in the market, and specific product models can be selected by those skilled in the art according to needs.
Compared with embodiment 2, in this embodiment, the X-shaped reinforcing members are fixed to the inner panel 42 and the outer panel 43, and the strength of the entire door can be further enhanced; the polyurethane sandwich layer 420 and the rock wool sandwich layer 430 are arranged to effectively avoid the cold bridge phenomenon.
Example 4
A wide-temperature-range wind load-resistant heat insulation system for an airplane test comprises a door rail structure 1 pre-embedded on the inner wall of a door opening, a wind pressure resistant door body 2 movably arranged on the door rail structure 1, and a sealing system 3 arranged on the wind pressure resistant door body 2;
the door rail structure 1 comprises a lower door rail 10 which is horizontally embedded at the lower end of the inner wall of the door opening; an upper door rail 11 which is horizontally pre-embedded at the upper end of the inner wall of the door opening and corresponds to the lower door rail 10 up and down;
the lower door rail 10 comprises an embedded plate 100, a central door rail 101 arranged on the embedded plate 100, and door separating rails 102 arranged on the embedded plate 100 and positioned at two sides of the central door rail 101;
the wind pressure resistant door body 2 comprises 3 wind pressure resistant door leaves 4 with the same size, an upper end guide wheel 21 which is arranged at the upper end of the wind pressure resistant door leaf 4 and movably connected with the upper door rail 11, and a bearing wheel mechanism 22 which is arranged at the lower end of the wind pressure resistant door leaf 4 and movably connected with the central door rail 101 and the door separating rail 102;
the wind pressure resistant door leaf 4 comprises a door leaf bottom beam 40 connected with the bearing wheel mechanism 22, a door leaf top beam 41 connected with the upper end guide wheel 21, and a main body frame arranged between the door leaf bottom beam 40 and the door leaf top beam 41;
the center of the wind pressure resistant door leaf 4 is provided with a central rotating shaft 47 which penetrates from top to bottom; the upper end of the central rotating shaft 47 is connected with the upper end guide wheel 21, and the lower end is connected with the bearing wheel mechanism 22;
as shown in fig. 3, the load-bearing wheel mechanism 22 includes a load-bearing bridge plate 220 connected to the central rotating shaft 47 at the middle portion, a first load-bearing wheel 221 disposed on the load-bearing bridge plate 220 and directly below the central rotating shaft 47, and second load-bearing wheels 222 disposed on the load-bearing bridge plate 220 and located at both sides of the first load-bearing wheel 221;
the first load bearing wheel 221 is connected with the central door rail 101; the second bearing wheel 222 is connected with the door separating rail 102;
the lower end of the door leaf bottom beam 40 is also uniformly provided with a third bearing wheel 223 connected with the central door rail 101; a bearing wheel rotation inlet 224 is formed in the central door rail 101; a baffle 225 is arranged on the load-bearing wheel inlet 224.
The pre-buried depth of the pre-buried plate 100 is 1m, and the ice melting system is arranged.
The wind pressure resistant door leaf 4 is provided with inner hooks 48 on the side surface.
As shown in fig. 6, the sealing system 3 includes an epdm rubber sealing member 30 surrounding the wind-pressure-resistant door leaf 4, a sealant for connecting the epdm rubber sealing member 30, and an inflatable sealing structure disposed around the wind-pressure-resistant door leaf 4;
the inflatable sealing structure comprises a sealing air cushion 31 arranged around the wind pressure resistant door leaf 4, a nitrogen making system air storage tank 33 communicated with the sealing air cushion 31 through an inflation pipe 32, and a pressure regulating valve 34 arranged on the nitrogen making system air storage tank 33.
The main frame is a conventional truss structure. And power motors are arranged on the second bearing wheel 222 and the upper end guide wheel 21.
The PLC is adopted to control the power motor; the power motor, the ice melting system and the PLC are all products sold in the market, and specific product models can be selected by those skilled in the art according to needs.
Compared with the embodiment 1, the inflatable sealing structure of the embodiment can seal 15 KPa-25 KPa around the wind resisting door leaf, and has stronger and more stable sealing performance.
Example 5
As shown in fig. 1, the present embodiment describes a parameter optimization method for a wide temperature range wind load resistant thermal insulation system for an aircraft test based on embodiment 3, which includes the following steps:
s1, firstly, determining the lengths of the upper door rail 11 and the lower door rail 10 and the height difference between the upper door rail 11 and the lower door rail 10 according to the size of the inner wall of the door opening; wherein the lengths of the upper door rail 11 and the lower door rail 10 are both 75 m; the height difference is 19 m;
s2, establishing a static simulation model according to the length and the height of the door rail structure 1, dividing grids, and applying a target load; the target load is 825N/m2；
Then, according to the stress cloud chart, determining the specific number of the wind pressure resistant door leaves 4 and the thicknesses of the inner panel 42, the outer panel 43 and the top wind rib plate 44; the specific number of the wind pressure resistant door leaves 4 is 5; the thickness of the inner panel 42 and the outer panel 43 are both 4.6 mm; the thickness of the top wind rib plate 44 is 2 mm;
s3, determining the model of the central door rail 101 according to the data of the step S2; the central door rail 101 adopts a QU120 heavy rail with the model number of U71 Mn;
s4, determining the thickness of the polyurethane sandwich layer 420 covered on the inner panel 42 to be 160mm, and determining the thickness of the rock wool sandwich layer 430 covered on the outer panel 43 to be 180 mm.
Example 6
This embodiment is different from embodiment 5 in that,
in the step S1: the lengths of the upper door rail 11 and the lower door rail 10 are both 60 m; the height difference is 18 m;
in the step S2: the target load is 800N/m2(ii) a The specific number of the wind pressure resistant door leaves 4 is 3; the thickness of the inner panel 42 and the outer panel 43 are both 3 mm; the thickness of the top wind rib plate 44 is 1.5 mm;
in the step S4: the thickness of the polyurethane sandwich layer 420 is 200 mm; the thickness of rock wool sandwich layer 430 is 200 mm.
Example 7
This embodiment is different from embodiment 5 in that,
in the step S1: the lengths of the upper door rail 11 and the lower door rail 10 are both 80 m; the height difference is 20 m;
in the step S2: the target load is 850N/m2(ii) a The specific number of the wind pressure resistant door leaves 4 is 8; the thickness of the inner panel 42 and the outer panel 43 are both 6 mm; the thickness of the top wind rib plate 44 is 3 mm;
in the step S4: the thickness of the polyurethane sandwich layer 420 is 200 mm; the thickness of rock wool sandwich layer 430 is 220 mm.
Claims (10)
1. A wide-temperature-range wind load-resistant heat insulation system for an aircraft test is characterized by comprising a door rail structure (1) pre-embedded on the inner wall of a door opening, a wind pressure resistant door body (2) movably arranged on the door rail structure (1), and a sealing system (3) arranged on the wind pressure resistant door body (2);
the door rail structure (1) comprises a lower door rail (10) which is horizontally embedded at the lower end of the inner wall of the door opening; an upper door rail (11) which is horizontally pre-embedded at the upper end of the inner wall of the door opening and corresponds to the lower door rail (10) up and down;
the lower door rail (10) comprises an embedded plate (100), a central door rail (101) arranged on the embedded plate (100), and door separating rails (102) arranged on the embedded plate (100) and positioned at two sides of the central door rail (101);
the wind pressure resistant door body (2) comprises a plurality of wind pressure resistant door leaves (4) with the same size, an upper end guide wheel (21) which is arranged at the upper end of the wind pressure resistant door leaf (4) and movably connected with the upper door rail (11), and a bearing wheel mechanism (22) which is arranged at the lower end of the wind pressure resistant door leaf (4) and movably connected with the central door rail (101) and the door separating rail (102);
the wind pressure resistant door leaf (4) comprises a door leaf bottom beam (40) connected with the bearing wheel mechanism (22), a door leaf top beam (41) connected with an upper end guide wheel (21), and a main body frame arranged between the door leaf bottom beam (40) and the door leaf top beam (41);
the center of the wind pressure resistant door leaf (4) is provided with a central rotating shaft (47) which penetrates from top to bottom; the upper end of the central rotating shaft (47) is connected with the upper end guide wheel (21), and the lower end of the central rotating shaft is connected with the bearing wheel mechanism (22);
the bearing wheel mechanism (22) comprises a bearing bridge plate (220) with the middle part connected with the central rotating shaft (47), a first bearing wheel (221) arranged on the bearing bridge plate (220) and positioned right below the central rotating shaft (47), and second bearing wheels (222) arranged on the bearing bridge plate (220) and positioned on two sides of the first bearing wheel (221);
the first bearing wheel (221) is connected with the central door rail (101); the second bearing wheel (222) is connected with the door separating rail (102);
the lower end of the door leaf bottom beam (40) is also uniformly provided with a third bearing wheel (223) connected with the central door rail (101); a bearing wheel rotating inlet (224) is formed in the central door rail (101); a baffle plate (225) is arranged on the bearing wheel inlet (224).
2. The wide-temperature-range wind load resistant and heat preservation system for the aircraft test as claimed in claim 1, wherein the second bearing wheel (222) and the upper end guide wheel (21) are provided with driving devices.
3. The wide-temperature-range wind load resistant heat preservation system for the aircraft test according to claim 1, wherein the main body frame comprises two inner panels (42) and two outer panels (43) which are respectively located indoors and outdoors, a plurality of top wind rib plates (44) which are uniformly distributed between the inner panels (42) and the outer panels (43) to form a plurality of rectangular spaces, and inclined strut triangular partition plates (45) which are obliquely inserted in the rectangular spaces;
the inclined strut triangular partition plates (45) form a corrugated shape, and corners of the corrugated shape are intersected with the end parts of the top wind rib plates (44).
4. The wide-temperature-range wind load resistant insulation system for aircraft testing according to claim 3, wherein the rectangular space is filled with insulation material (46).
5. The wide-temperature-range wind load resistant heat preservation system for the aircraft test according to claim 3, wherein X-shaped reinforcing members are fixed on the inner panel (42) and the outer panel (43); the X-shaped reinforcing piece is two reinforcing rods which are arranged in a crossed mode, and the reinforcing rods are located on the diagonal line of the wind pressure resisting door leaf (4) and connected with the inner panel (42) and the outer panel (43) through bolts.
6. The wide-temperature-range wind load resistant thermal insulation system for aircraft testing according to claim 5, wherein the X-shaped reinforcing members of the inner panel (42) are covered with a polyurethane sandwich layer (420);
the X-shaped reinforcing piece of the outer panel (43) is covered with a rock wool sandwich layer (430).
7. The wide-temperature-range wind load resistant insulation system for aircraft testing according to claim 1, wherein the wind pressure resistant door leaf (4) is provided with inner hooks (48) at the side surface, wherein the inner hooks can be connected with each other.
8. The wide-temperature-range wind load-resistant heat preservation system for the aircraft test as claimed in claim 1, wherein the pre-buried depth of the pre-buried plate (100) is 0.6-1.2 m, and a de-icing system is arranged.
9. The wide-temperature-range wind load resistant heat preservation system for the aircraft test is characterized in that the sealing system (3) comprises an ethylene propylene diene monomer rubber sealing element (30) arranged around the wind pressure resistant door leaf (4), a sealing glue used for connecting the ethylene propylene diene monomer rubber sealing element (30), and an inflatable sealing structure arranged around the wind pressure resistant door leaf (4);
inflatable seal structure establishes including enclosing wind pressure door leaf (4) sealing air cushion (31) all around, through gas tube (32) with nitrogen system gas holder (33) of sealing air cushion (31) intercommunication, and set up pressure regulating valve (34) on the nitrogen system gas holder (33).
10. The parameter optimization method of the wide-temperature-range wind load resistant heat preservation system for the aircraft test according to any one of claims 1 to 9, characterized by comprising the following steps:
s1, firstly, determining the lengths of the upper door rail (11) and the lower door rail (10) and the height difference between the upper door rail (11) and the lower door rail (10) according to the size of the inner wall of the door opening; wherein the lengths of the upper door rail (11) and the lower door rail (10) are both 60-80 m; the height difference is 18-20 m;
s2, establishing a static simulation model according to the length and the height of the door rail structure (1), dividing grids, and applying a target load; the target load is 800-850N/m2；
Then, according to the stress cloud picture, determining the specific number of the wind pressure resistant door leaves (4) and the thicknesses of the inner panel (42), the outer panel (43) and the top wind rib plate (44); the specific number of the wind pressure resistant door leaves (4) is 3-8; the thicknesses of the inner panel (42) and the outer panel (43) are both 3-6 mm; the thickness of the top wind rib plate (44) is 1.5-3 mm
S3, determining the model of the central door rail (101) according to the data of the step S2;
s4, determining the thickness of the polyurethane sandwich layer (420) covered on the inner panel (42) and determining the thickness of the rock wool sandwich layer (430) covered on the outer panel (43).
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| CN202111645494.5A CN114348292B (en) | 2021-12-30 | 2021-12-30 | Wide-temperature-range wind load-resistant heat insulation system for airplane test |
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| CN113834682A (en) * | 2021-11-26 | 2021-12-24 | 中国飞机强度研究所 | Freezing prevention device for airplane test |
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| CN1477286A (en) * | 2003-07-18 | 2004-02-25 | 志 樊 | Fire-resisting sound-insulating safety door and its production method |
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| CN114348292B (en) | 2022-06-07 |
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