CN114509232B - Hole wall device for modularized wind tunnel test - Google Patents
Hole wall device for modularized wind tunnel test Download PDFInfo
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- CN114509232B CN114509232B CN202210066575.8A CN202210066575A CN114509232B CN 114509232 B CN114509232 B CN 114509232B CN 202210066575 A CN202210066575 A CN 202210066575A CN 114509232 B CN114509232 B CN 114509232B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
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Abstract
The application discloses a hole wall device for a modularized wind tunnel test, which relates to the technical field of wind tunnel tests and comprises a modularized wall plate composed of at least one substrate, wherein a plurality of substrates are arranged in a rectangular array, a plurality of air inlet channels are formed in each substrate, contraction mechanisms are arranged in the plurality of air inlet channels, cover plates for pressing the plurality of contraction mechanisms one by one are further arranged on the outer sides of each substrate, and ventilation holes 201 corresponding to the air inlet channels are formed in the cover plates. The application not only makes the installation and the disassembly more convenient, but also makes the later maintenance more convenient, reduces the processing and assembly difficulty and realizes high cost performance.
Description
Technical Field
The application relates to the technical field of wind tunnel tests, in particular to a hole wall device for a modularized wind tunnel test.
Background
The hole wall device can generate a transonic flow field meeting the test requirement in the actual wind tunnel test process, namely, the air flow of the test section flows out of the test section through the holes formed in the wall device, so that the air flow of the test section gradually changes along the flow direction, and the air flow is accelerated and forms a flow field with a certain speed required by the test due to the change of the flow. Under different simulated flow rates, the optimal flow field quality of the wind tunnel flow field is different from the opening and closing ratio and the ventilation area distribution requirement, namely, the optimal flow field under different speeds of the wind tunnel corresponds to different opening and closing ratios and ventilation area distribution rates. The wind tunnel aperture ratio and ventilation area in the current hole wall device are fixed, and the flow field quality of the whole transonic speed range is required to be considered, so that the flow field at each simulation speed is not optimal, and deviation of test data and theoretical data is caused.
With the continuous development of the aerodynamics fine design direction of the aircrafts in China, the higher the requirement on the flow field quality of the wind tunnel is, the urgent need is to establish an opening and closing ratio and ventilation area or integral real-time adjustable technology to realize the optimal adjustment of the flow field quality at each simulation speed, and in this regard, patent document with the application number of CN201910941202.9 discloses a hole wall opening and closing ratio continuous adjustable device for wind tunnel test and an experimental method. However, the hole wall device disclosed in the technology is of an integral structure, and in the actual use process, the hole wall plate is difficult to disassemble and maintain, so that the hole wall device does not meet the actual use requirements.
Disclosure of Invention
The application aims to provide a hole wall device for a modularized wind tunnel test, which is more convenient to mount and dismount and convenient to maintain in the later period.
In order to achieve the aim of the application, the technical scheme adopted is as follows: the utility model provides a pore wall device for modularization wind tunnel test, includes the modularization wallboard of constituteing by at least one base plate, and a plurality of base plates are rectangular array and arrange, all offer a plurality of air inlet channel on every base plate, all install shrink mechanism in a plurality of air inlet channel, and the apron that compresses tightly a plurality of shrink mechanisms of every base plate outside still installs one by one, has offered the bleeder vent that corresponds with the air inlet channel on the apron.
Furthermore, the inner side of the modularized wallboard is also provided with a hole wallboard, and through holes corresponding to the air inlet channels one by one are further formed in the hole wallboard.
Further, still include the mounting bracket, the mounting bracket includes a plurality of risers that the interval was arranged, and the base plate is fixed between two adjacent risers, and the pore wall board is installed on a plurality of risers jointly.
Further, a reinforcing rod is further connected between two adjacent vertical plates.
Further, the mounting frame is further provided with a mounting structure, and the mounting structure comprises a mounting plate arranged on the mounting frame and a hook arranged on the mounting plate.
Further, the mounting plate is also rotatably supported with a roller assembly.
Further, the number of hooks on the mounting plate is at least two, the plurality of hooks are divided into two groups, and the two groups of hooks are oppositely arranged along the width direction of the modularized wallboard.
Further, the mounting structures are two groups, and the two groups of mounting structures are symmetrically distributed along the central axis of the modularized wallboard.
Further, the air inlet channels on the substrate are uniformly distributed at intervals in a plurality of rows, and the adjacent two rows of air inlet channels are distributed in a staggered manner.
Furthermore, the base plate and the cover plate are both 7075 aviation aluminum materials.
The application has the advantages that,
according to the application, the plurality of base plates are spliced together to form the modularized wallboard, and the shrinkage mechanisms in each air inlet channel are respectively pressed and fixed by adopting one cover plate, so that the shrinkage mechanisms on the base plates are sequentially pressed and fixed by adopting the cover plates after being installed, the same cover plate is not required to be covered on the base plates after all the shrinkage mechanisms are installed, the compaction effect of the shrinkage mechanisms is better, the installation of the cover plates is more convenient, and the corresponding cover plates can be directly taken down for replacement when the shrinkage mechanism in one air inlet channel needs to be replaced, so that the installation of other shrinkage mechanisms is not influenced; meanwhile, after the contraction mechanism and the cover plate on the same substrate are installed, the plurality of substrates are directly assembled together, so that the whole installation is more convenient.
The application not only makes the installation and the disassembly more convenient, but also makes the later maintenance more convenient, reduces the processing and assembly difficulty and realizes high cost performance.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the principles of the application.
FIG. 1 is a perspective view of a modular wind tunnel test aperture wall apparatus provided by the present application;
FIG. 2 is a side view of a modular wind tunnel test aperture wall apparatus provided by the present application;
FIG. 3 is a schematic view of a modular wall panel;
FIG. 4 is a schematic view of the mounting of a base plate and a cover plate;
FIG. 5 is a schematic structural view of the retraction mechanism;
FIG. 6 is a schematic structural view of a rubber sleeve;
FIG. 7 is a schematic structural view of a cover plate;
fig. 8 is a schematic structural view of the hole wall plate.
The reference numerals and corresponding part names in the drawings:
1. modular wall panels, 2, cover plates, 3, kong Biban, 4, mounting brackets;
101. the base plate, 102, the air inlet channel, 103, the mounting groove, 104, the rubber sleeve, 105, the air inflation channel, 106, the air inflation joint, 107, the upper edge table, 108, the reinforcement sleeve, 109, the lower edge table, 110, the vent hole, 111, the annular groove, 112, the sealing groove, 113 and the sealing ring;
201. ventilation holes;
301. a through hole;
401. vertical plates, 402, reinforcing rods, 403, mounting plates, 404, hooks, 405 and roller assemblies.
Detailed Description
The present application will be described in further detail with reference to the drawings and embodiments. It is to be understood that the specific embodiments described herein are merely illustrative of the substances, and not restrictive of the application. It should be further noted that, for convenience of description, only the portions related to the present application are shown in the drawings.
In addition, the embodiments of the present application and the features of the embodiments may be combined with each other without collision. The present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
As shown in fig. 1 to 4, the hole wall device for a modularized wind tunnel test provided by the application comprises a modularized wallboard 1 formed by at least one substrate 101, wherein the substrate 101 is rectangular, when the wind tunnel is smaller, the required modularized wallboard 1 is smaller, at the moment, the modularized wallboard 1 can be directly formed by one substrate 101, when the wind tunnel is larger, the required modularized wallboard 1 is larger, at the moment, the modularized wallboard 1 can be formed by jointly splicing a plurality of substrates 101, and in the splicing process of the substrates 101, the substrates 101 are arranged in a rectangular array.
The substrate 101 may be 7075 aviation aluminum, and the thickness of the substrate 101 is 25mm, where the material of the substrate 101 and the thickness of the substrate 101 may be adjusted according to actual use conditions; meanwhile, a plurality of air inlet channels 102 are formed in each substrate 101, the aperture of each air inlet channel 102 is phi 8mm, the air inlet channels 102 are obliquely arranged, the central axis of each air inlet channel 102 forms an included angle of 60 degrees with the thickness direction of the substrate 101, the specific inclination angle of each air inlet channel 102 can be adjusted according to actual use conditions, and through experimental analysis, when the inclination angle of each air inlet channel 102 is 60 degrees, the resistance of wind in a wind tunnel when entering the air inlet channel 102 is smaller.
The air inlet channel 102 is also internally provided with a contraction mechanism, and the structure adopted by the contraction mechanism in the application is the same as that of the contraction mechanism disclosed in patent document with the application number of CN201910941202.9, namely, the ventilation area of the air inlet channel 102 is fixed under the condition that the contraction mechanism does not act, the inner wall of the air inlet channel 102 is a smooth inner wall at the moment, the ventilation area of the air inlet channel 102 is the maximum ventilation area, and the ventilation area of the air inlet channel 102 is reduced when the contraction mechanism is used.
The base plate 101 is further provided with a plurality of cover plates 2, the plurality of cover plates 2 are used for fixing the plurality of shrinkage mechanisms in the air inlet channel 102 in a one-to-one pressing mode, and in order to ensure that wind passing through the shrinkage mechanisms can smoothly penetrate through the cover plates 2, the cover plates 2 are provided with ventilation holes 201 corresponding to the air inlet channel 102, and in order to enable the wind to pass through the shrinkage mechanisms and the ventilation holes 201 to be smoother, the aperture of the ventilation holes 201 is equal to the maximum ventilation area of the air inlet channel 102, and the ventilation holes 201 and the air inlet channel 102 are coaxially arranged. Here, the apron 2 can be directly through screw fixation on base plate 101, and in order to design simple to operate, the apron 2 material selection can preferentially select 7075 aviation aluminium under the condition that satisfies the test requirement, and the thickness of apron 2 can be 3mm, and of course, the specific thickness of apron 2 can be adjusted according to actual use condition.
In the application, because the air inlet channel 102 is obliquely arranged, and the air holes 201 on the cover plate 2 and the air inlet channel 102 are coaxially arranged, both ends of the air holes 201 are elliptical; meanwhile, since the number of the shrinkage mechanisms installed on one base plate 101 is large, and each shrinkage mechanism needs to be provided with one cover plate 2 for compaction, in order to ensure that the shape of each cover plate 2 needs to be reduced as much as possible, when the structure of the cover plate 2 is designed, the main body shape of the cover plate 2 can be set to be elliptical matching with the shape of the inlet end of the ventilation hole 201, as shown in fig. 7, but in order to enable the installation position of the cover plate 2 with the screw and the installation position of the air charging connector 106, the parts of the cover plate 2 for installing the screw and the air charging connector 106 can protrude outwards, the fixation of the cover plate 2 and the installation of the air charging connector 106 can be satisfied without affecting the compaction of the cover plate 2 on the lower edge table 109, namely, the shape of the cover plate 2 is in an irregular shape, when a plurality of cover plates 2 are simultaneously installed on the base plate 101, the shapes of two adjacent cover plates 2 can be coupled, and the distance between the two adjacent air inlet channels 102 can be reduced as much as possible during the design.
In the application, when the device is installed, the contraction mechanisms are firstly installed in the air inlet channels 102 on the base plate 101, after the contraction mechanisms are installed, the cover plate 2 and the base plate 101 are fixed according to the correct position relation, and finally the base plate 101 with the contraction mechanisms and the cover plate 2 installed are spliced together and assembled. According to the application, the cover plate 2 is not required to be covered together after all the contraction mechanisms are installed, so that the compression effect of the contraction mechanisms is better, the installation of the cover plate 2 is more convenient, and the corresponding cover plate 2 can be directly taken down for replacement when the contraction mechanism in one air inlet channel 102 needs to be replaced, so that the installation of other contraction mechanisms is not influenced; meanwhile, after the contraction mechanism and the cover plate 2 on the same substrate 101 are installed, the plurality of substrates 101 are directly assembled together, so that the whole installation is more convenient.
In some embodiments, the inner side of the modular wall plate 1 is further provided with a hole wall plate 3, the hole wall plate 3 is of an integral structure, the size of the hole wall plate 3 corresponds to that of the modular wall plate 1, the hole wall plate 3 is further provided with through holes 301 corresponding to the air inlet channels 102 one by one, as shown in fig. 8, the through holes 301 are coaxially arranged with the air inlet channels 102, and the aperture of the through holes 301 is equal to that of the air inlet channels 102, so that when the application is used in wind tunnel experiments, the wind tunnel surface is of an integral structure, turbulence to a flow field is avoided, and the accuracy of the experiments is ensured.
In some embodiments, the hole wall device for the modularized wind tunnel test further comprises a mounting frame 4, the mounting frame 4 is positioned on the outer side of the modularized wallboard 1, the mounting frame 4 comprises a plurality of vertical plates 401 which are arranged at intervals, the length direction of the vertical plates 401 is consistent with the length direction of the modularized wallboard 1, namely, the plurality of vertical plates 401 are arranged at intervals along the width direction of the modularized wallboard 1, when the substrate 101 is installed, two sides of the substrate 101 are fixed on opposite surfaces of two adjacent vertical plates 401, at the moment, the substrate 101 and the vertical plates 401 can be directly fixed through screws, and when the substrate 101 is installed, the inner surface of the substrate 101 is flush with the lower end surface of the vertical plates 401; simultaneously, hole wallboard 3 passes through the screw to be fixed with riser 401's lower terminal surface, not only makes the installation of hole wallboard 3 more firm, and makes hole wallboard 3 after the installation, and hole wallboard 3 and base plate 101 seal laminating to make the wind in the air inlet channel 102 can not disperse and enter into between hole wallboard 3 and the base plate 101, guaranteed the stability of flow field.
When the cover plate 2 is installed, the cover plate 2 and the base plate 101 are fixedly installed together through a plurality of screws, the screws are uniformly distributed on the periphery of the cover plate 2, and deformation or non-strict sealing of the cover plate 2 caused by non-uniform screw fastening on the cover plate 2 is effectively avoided.
In some embodiments, a reinforcing rod 402 is further connected between two adjacent vertical plates 401. When the number of the upright plates 401 is greater than two, the plurality of upright plates 401 can be provided with the reinforcing rods 402 together, at the moment, two ends of the reinforcing rods 402 are respectively fixed with the upright plates 401 at two sides, and the middle parts of the reinforcing rods 402 respectively penetrate through the plurality of upright plates 401; of course, when the number of the upright plates 401 is greater than two, the reinforcing rods 402 may also be directly connected between the adjacent two upright plates 401. When the length of the upright plates 401 is long, the number of the reinforcing rods 402 between two adjacent upright plates 401 may be plural, and the plurality of reinforcing rods 402 may be arranged at intervals along the length direction of the upright plates 401. To reduce the weight of the present application, the stiffener 402 may be a hollow bar. By installing the reinforcing bars 402, the structure of the mounting frame 4 is made more stable, thereby making the installation of the modular wall panels 1 and the wall panels 3 more stable.
In some embodiments, the mounting frame 4 is further provided with a mounting structure, and the mounting structure is mainly used for enabling the application to quickly complete the mounting when the mounting is required; the mounting structure includes a mounting plate 403 and hooks 404, the mounting plate 403 is commonly fixed on a plurality of vertical plates 401 or commonly fixed on two adjacent vertical plates 401, and the hooks 404 are mounted on the mounting plate 403. When the application is required to be arranged at the top of the wind tunnel, the application can be stably hung on the inner wall of the wind tunnel directly through the hooks 404; when the application needs to be installed at the bottom of the wind tunnel, the installation position of the application can be more stable directly through the hook 404, so that the installation is more convenient and the installation precision is higher.
In some embodiments, the mounting plate 403 further rotatably supports a roller assembly 405, and the roller assembly 405 can support the present application when the present application is placed on the ground or other platforms, so that the present application is more convenient to carry; meanwhile, the height of the roller assembly 405 is higher than that of the hook 404, so that the hook 404 is not damaged when the roller assembly is placed on the ground or other platforms under the condition that the hook 404 is ensured to be used normally.
In some embodiments, the number of hooks 404 on the mounting plate 403 is at least two, the plurality of hooks 404 are divided into two groups, and the two groups of hooks 404 are oppositely arranged along the width direction of the modular wallboard 1, so that after the mounting, the left-right shaking of the application can be limited by the two groups of hooks 404, thereby ensuring that the mounting of the application is more stable; meanwhile, in order to facilitate the installation of the hooks 404, the hooks 404 are Z-shaped, one end of each hook 404 can be fixed on the installation plate 403 through a screw, at this time, the parts matched with the hooks 404 on the inner wall of the wind tunnel can be T-shaped sliding rails which are inversely installed, and two groups of hooks 404 on the installation plate 403 are respectively hung on two sides of the horizontal section of the T-shaped sliding rails, so that the T-shaped sliding rails hung on the inner wall of the wind tunnel by the hooks 404 are more stable, and the application can advance through the sliding fit of the hooks 404 and the T-shaped sliding rails during the installation, thereby facilitating the installation of the application.
In some embodiments, the two sets of mounting structures are symmetrically arranged along the central axis of the modular wallboard 1, and the two sets of mounting structures cooperate to make the acting forces on two sides of the modular wallboard more balanced during mounting, so that the mounting of the modular wallboard is more stable.
In some embodiments, the air inlet channels 102 on the substrate 101 are arranged in multiple rows at uniform intervals, and the adjacent two rows of air inlet channels 102 are arranged in a staggered manner, so that the air inlet channels 102 on the substrate 101 are arranged in uniform intervals, the air flow in the experimental process is more uniform, and the flow field of the air flow is more similar to that of the air flow of an airplane in the flight process.
In some embodiments, the inner wall of the air inlet channel 102 is provided with a mounting groove 103, the mounting groove 103 is a ring groove 111, the shrinkage mechanism is mounted in the mounting groove 103, and after the shrinkage mechanism is mounted, the inner wall of the shrinkage mechanism is flush with the inner wall of the air inlet channel 102, so that the air inlet channel 102 is smoother, the air flow flows more smoothly when entering the air inlet channel 102, the final measurement precision is higher, and the accuracy of the flow field quality is ensured.
In some embodiments, as shown in fig. 5 and 6, the shrinking mechanism includes a rubber sleeve 104 installed in the installation groove 103, the rubber sleeve 104 is coaxially arranged with the air inlet channel 102, that is, an included angle between a central axis of the rubber sleeve 104 and a thickness direction of the base plate 101 is also 60 degrees, an inner wall of the rubber sleeve 104 extends along the inner wall of the air inlet channel 102, and a ventilation area of the rubber sleeve 104 is 3.14mm2 to 50.24mm2 through a change of a diameter of the rubber sleeve 104. A driving mechanism is further mounted on the cover plate 2, and the driving mechanism is used for driving the rubber sleeve 104 to bulge inwards. Because the substrate 101 is horizontally placed in the wind tunnel experiment process, namely the air inlet channel 102, the rubber sleeve 104 and the ground surface are all 60 degrees in the wind tunnel experiment process, the wind flow state of the aircraft in the flight process is simulated; the inner diameter of the rubber sleeve 104 is the same as the inner diameter of the air inlet channel 102, so that the inner wall of the air inlet channel 102 can be considered to be kept flush after the rubber sleeve 104 is installed, and the inner wall of the air inlet channel 102 is kept flat.
The rubber sleeve 104 is made of natural rubber, the hardness of the rubber sleeve 104 is 55 hrc/65 hrc/75 hrc, the shrinkage rate of the rubber sleeve 104 is about 2.1%, in the actual use process, the specific hardness and the shrinkage rate of the rubber sleeve 104 can be adjusted according to technical requirements, and in order to ensure the shrinkage of the rubber sleeve 104, the thickness of the rubber sleeve 104 can be adjusted according to the measured requirements and the shrinkage rate of the rubber sleeve 104. In the installation process, the two ends of the rubber sleeve 104 are respectively fixed at the two ends of the mounting groove 103, so that the two ends of the rubber sleeve end are fixed, the rubber sleeve 104 is prevented from dislocating displacement in the air inlet channel 102 in the deformation process of the rubber sleeve 104 by the driving structure, the deformation of the rubber sleeve 104 can only deform towards the center of the air inlet channel 102, and the shape fixation of the rubber sleeve 104 in the contraction process is ensured to be repeatable.
In some embodiments, a radial gap is left between the outer wall of the rubber sleeve 104 and the inner wall of the mounting groove 103, the base plate 101 and the cover plate 2 are provided with round holes, the axial direction of the round holes is consistent with the thickness direction of the base plate 101, and the round holes on the base plate 101 and the cover plate 2 are communicated to form a channel, the channel is an inflation channel 105, and the inflation channel 105 is a driving mechanism for driving the rubber sleeve 104 to bulge. Because a certain radial distance is formed between the outer wall of the rubber sleeve 104 and the inner wall of the mounting groove 103, an annular cavity is formed between the outer wall of the rubber sleeve 104 and the inner wall of the mounting groove 103, and the periphery of the rubber sleeve 104 can be covered by the cavity; at least one air charging channel 105 is arranged, the air discharging end of the air charging channel 105 penetrates through the wall of the mounting groove 103 to be communicated with the cavity, and the air discharging end of the air charging channel 105 can be positioned in the middle or the lower part of the cavity when the design is performed. When compressed air enters the air charging channel 105, the compressed air in the air charging channel 105 smoothly enters the cavity, at the moment, the air in the cavity is uniformly coated on the outer wall of the rubber sleeve 104, when the air pressure in the cavity reaches a certain degree, the air pressure in the cavity can squeeze the rubber sleeve 104, so that the rubber sleeve 104 deforms, the rubber sleeve 104 expands towards the inside of the air inlet channel 102, the opening degree of the air inlet channel 102 is changed, the ventilation area of the air inlet channel 102 is changed, the opening degree and the ventilation area of the air inlet channel 102 are adjusted, the flow field of the wind tunnel can reach the optimal flow field quality at different simulation speeds, and the flow field of the aircraft in the flight process is accurately simulated, so that the experimental measurement data is more accurate finally.
The cover plate 2 is also provided with an inflation connector 106, the exhaust end of the inflation connector 106 is arranged on a round hole of the cover plate 2, and the exhaust end of the inflation connector 106 extends into the round hole on the base plate 101, so that the inflation connector 106 is communicated with the inflation channel 105 after the inflation connector 106 is arranged. The inflation connector 106 is a quick-screwing connector PC-M5, the installation mode of the inflation connector 106 is one of thread fixing and welding, when the inflation connector is used, the air inlet end of the inflation connector 106 is connected with an air pipe branch pipe for conveying compressed air, then the inlet ends of a plurality of air pipe branch pipes are connected in parallel on a main air pipe, the air pipe branch pipe is an air pipe with phi 4mm, the main air pipe is an air pipe with phi 6mm, and the air pipe branch pipe and the main air pipe are PU materials with pressure resistance of 1 MPa.
In some embodiments, the mounting groove 103 is a countersunk groove, specifically, the inner end of the mounting groove 103 does not penetrate through the inner surface of the substrate 101, and the outer end of the mounting groove 103 penetrates through the outer surface of the substrate 101, so that the bottom of the mounting groove 103 has an annular step. The outer end of the rubber sleeve 104 is also provided with an everting lower edge table 109, the lower edge table 109 and the rubber sleeve 104 are of an integral structure, and the lower edge table 109 is pressed between the cover plate 2 and the base plate 101. Because the air inlet channel 102 is obliquely arranged, and the mounting groove 103 and the rubber sleeve 104 are coaxially arranged with the air inlet channel 102, the step at the bottom of the mounting groove 103 is elliptical, and the outer end of the rubber sleeve 104 is also elliptical. The thickness of the lower edge table 109 is preferably 1-1.5 mm, and the specific thickness of the lower edge table 109 can be adjusted according to practical situations. The outer surface of the lower edge table 109 is flush with the lower surface of the rubber sleeve 104, and the outer surface of the lower edge table 109 is higher than the outer surface of the base plate 101, so that when the cover plate 2 is pressed on the outer surface of the base plate 101, the pressing force exerted by the cover plate 2 firstly acts on the lower edge table 109, the lower edge table 109 is pressed and fixed between the base plate 101 and the cover plate 2, the outer end of the rubber sleeve 104 is fixedly installed, the fixation of the rubber sleeve 104 can be ensured, the rubber sleeve 104 is prevented from dislocation displacement when the rubber sleeve 104 bulges through compressed air, and the installation and replacement of the rubber sleeve 104 are more convenient.
In some embodiments, the inner end of the rubber sleeve 104 further has an everted upper edge table 107, and the upper edge table 107 is fixed to the bottom of the mounting groove 103. The upper edge table 107 and the rubber sleeve 104 are integrally formed, and the rubber sleeve 104 is circular, namely the upper edge table 107 is also circular, and the thickness of the upper edge table 107 is preferably 1.2-1.3 mm, and the specific thickness of the upper edge table 107 can be adjusted according to actual conditions; the outer surface of the upper edge table 107 is flush with the inner end of the rubber sleeve 104, so that the contact area between the inner end of the rubber sleeve 104 and the mounting groove 103 is increased, the fixing effect of the inner end of the rubber sleeve 104 is better, and the fixing of the inner end of the rubber sleeve 104 is more stable.
In some embodiments, the rubber sleeve 104 is further sleeved with a reinforcing sleeve 108, the reinforcing sleeve 108 is a copper tube, the reinforcing sleeve 108 and the rubber sleeve 104 are coaxially arranged, and an air inflation cavity is formed between the reinforcing sleeve 108 and the rubber sleeve 104, the air inflation cavity is the cavity, and is still annular, so that the air inflation cavity is coated outside the rubber sleeve 104, and the compressed air in the air inflation cavity can still uniformly act on the rubber sleeve, so that the extrusion force suffered by the rubber sleeve 104 is more uniform. The upper end of the reinforcement sleeve 108 is abutted against the upper edge table 107, the lower end of the reinforcement sleeve 108 is abutted against the lower edge table 109, and in order to enable the reinforcement sleeve 108 to have a better abutting effect on the upper edge table 107 and the lower edge table 109, an annular groove 111 matched with the end part of the reinforcement sleeve 108 can be formed in the upper edge table 107 and the lower edge table 109, two ends of the reinforcement sleeve 108 can be respectively clamped in the two annular grooves 111, and the clamping position of the reinforcement sleeve 108 is enabled to be more accurate. The reinforcing sleeve 108 is further provided with a vent hole 110 for communicating the inflation cavity with the inflation channel 105, so that the compressed air entering the inflation channel 105 directly enters the inflation cavity through the vent hole 110, and the compressed air can smoothly enter the inflation cavity.
By sleeving the reinforcing sleeve 108 outside the rubber sleeve 104, when the cover plate 2 compresses the lower edge table 109, the compressing force applied by the lower edge table 109 acts on the reinforcing sleeve 108, so that the lower edge table 109 is compressed between the reinforcing sleeve 108 and the cover plate 2, the outer end of the reinforcing sleeve 108 is abutted against the upper edge table 107, the upper edge table 107 is clamped between the groove wall of the mounting groove 103 and the inner end of the reinforcing sleeve 108, the upper edge table 107 and the lower edge table 109 are fixed, and finally, the fixation of the two ends of the rubber sleeve 104 is realized, so that the fixation of the rubber sleeve 104 is more convenient; meanwhile, the cross section of the reinforcing sleeve 108 is annular, so that when the reinforcing sleeve 108 is abutted against the upper edge table 107 and the lower edge table 109, the pressing force applied to the upper edge table 107 and the lower edge table 109 is annular, and the lower edge table 109, the cover plate 2, the upper edge table 107 and the wall of the mounting groove 103 form a sealing ring structure, so that after the rubber sleeve 104 is fixedly mounted, the two ends of the rubber sleeve 104 are in sealing mounting, and the flowing air entering the air inlet channel 102 is effectively enabled to flow more smoothly.
The inner wall of the reinforcement sleeve 108 is in sealing fit with the outer wall of the rubber sleeve 104; the outer wall of the rubber sleeve 104 is also provided with a ring groove 111, and two ends of the vent hole 110 are respectively in butt joint with the inflation channel 105 and the ring groove 111. The outer wall of the reinforcement sleeve 108 is in sealing fit with the groove wall of the mounting groove 103, the inner diameter of the reinforcement sleeve 108 is matched with the outer diameter of the rubber sleeve 104, specifically, two ends of the rubber sleeve 104 are mounted in two ends of the reinforcement sleeve 108 in a inlaid manner, so that the reinforcement sleeve 108 can effectively support two ends of the rubber sleeve 104, and the mounting of two ends of the rubber sleeve 104 is more stable; by arranging the annular groove 111 on the outer wall of the rubber sleeve 104, at this time, the air filling cavity is the annular groove 111, which is not only used for storing compressed air, but also enables the thickness of the annular groove 111 arranged on the rubber sleeve 104 to be thinner, so that the softness of the part of the rubber sleeve 104 positioned in the annular groove 111 is better, the compressed air entering the annular groove 111 is easier to bulge the rubber sleeve 104 inwards, and the rubber sleeve 104 is more convenient to extrude. By abutting the two ends of the vent hole 110 with the cavity and the inflation channel 105 respectively, the compressed air entering the inflation channel 105 can directly enter the annular groove 111 through the vent hole 110, thereby directly acting on the rubber sleeve 104.
A sealing groove 112 is further formed on the outer surface of the substrate 101, the sealing groove 112 is a circular groove, the center of the sealing ring groove 111 and the central axis of the inflation channel 105 are on the same straight line, and the bottom of the sealing groove 112 can be a plane or an arc surface, so that the sealing groove 112 surrounds the air inlet end of the inflation channel 105; still install sealing washer 113 in the seal groove 112, sealing washer 113 is O type sealing washer 113, and sealing washer 113's highest position is not higher than the lowest position of lower edge platform 109, when apron 2 compresses tightly on base plate 101, sealing washer 113 is compressed tightly fixedly, make inflation inlet inflation channel 105 be sealed butt joint, effectively prevent that compressed air from producing when getting into inflation channel 105 and leaking, guarantee that the volume of the compressed air that enters into in the annular 111 is more accurate, guarantee that the degree of rubber sleeve bulge is more accurate, finally make the degree of opening and closing and the ventilation area of air inlet channel 102 more accurate, thereby the accurate flow field that produces in the flight of simulation aircraft, guarantee experimental measurement's accuracy.
The definition of the outer side, the outer surface, the outer end, the inner side, the inner surface, the inner end, etc. in the present application is based on the state that the modular wall plate 1 is mounted in the wind tunnel.
When the application is assembled, firstly, the rubber body and the reinforcing sleeve 108 are firmly inlaid according to a specified rule, the assembled shrinkage mechanism is correctly installed and flattened according to the direction inclined by 60 degrees, then the sealing ring 113 at the corresponding position is placed into the sealing groove 112, the above assembling steps are sequentially repeated until all the shrinkage mechanisms are assembled completely, and finally, the cover plate 2 and the base plate 101 are fixed according to the correct position relation.
When the cover plate 2 is fixed, the initial fastening is firstly started from the middle of the base plate 101, and the fastening is sequentially and orderly performed along the peripheral direction, so that the problem that the cover plate 2 is deformed or is not tightly sealed due to uneven fastening is avoided, and then the fastening is sequentially performed along the peripheral direction from the middle of the base plate 101. After the completion of the assembly of the substrate 101, the gas-filled joints 106 prepared in advance are mounted or soldered in order of 16 as a group.
The assembled base plates 101 are fixed between two adjacent vertical plates 401, so that the modular wall plate 1 is installed, after the modular wall plate 1 is installed, the hole wall plate 3 is attached to the inner surface of the modular wall plate 1, and the hole wall plate 3 is fixed with the vertical frames through screws.
And finally, performing pressure maintaining test to ensure that the test piece is stable and reliable.
When the flow field calibration research test is carried out in a 0.6-meter continuous wind tunnel, the application is respectively installed on the top surface of the wind tunnel and the bottom surface of the wind tunnel, and at this time, the modularized wallboard 1 in the application can be formed by splicing 6 substrates 101, as shown in fig. 3, the 6 substrates 101 are divided into 3 columns, the number of the substrates 101 in each column is 2, the 3 columns of substrates 101 are sequentially arranged along the width of the wind tunnel, the width direction of the substrates 101 is consistent with the width direction of the wind tunnel, the length of each substrate 101 is 830mm, the width of each substrate 101 is 170mm, and the shrinkage mechanisms on each substrate 101 are synchronously controlled, so that the shrinkage mechanisms on each substrate 101 deform identically.
When a wind tunnel experiment is required, firstly, the air is inflated into the inflation channel 105 through the inflation connector 106, after the air enters the inflation channel 105, the compressed air directly enters the annular groove 111 through the vent holes 110 on the reinforcement sleeve 108, and the compressed air entering the annular groove 111 directly and uniformly acts on the rubber sleeve 104 to enable the rubber sleeve 104 to bulge into the air inlet channel 102, so that the opening degree and the ventilation area in the air inlet channel 102 are changed; by adjusting the opening degree and ventilation area of the plurality of air intake passages 102. After the adjustment is completed, the hole wall opening and closing ratio continuous adjustable device for the wind tunnel test is horizontally arranged on the inner bottom surface of the wind tunnel or is arranged on the inner top surface of the wind tunnel, and the air inlet hole on the hole wall opening and closing ratio continuous adjustable device for the wind tunnel test corresponds to the inside of the wind tunnel, so that the quality of a flow field in the wind tunnel can be guaranteed to be optimized under each different simulation speed, and finally, the experimental measurement data is more accurate.
In the description of the present specification, reference to the terms "one embodiment/manner," "some embodiments/manner," "example," "a particular example," "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment/manner or example is included in at least one embodiment/manner or example of the application. In this specification, the schematic representations of the above terms are not necessarily for the same embodiment/manner or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments/modes or examples. Furthermore, the various embodiments/modes or examples described in this specification and the features of the various embodiments/modes or examples can be combined and combined by persons skilled in the art without contradiction.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present application, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
It will be appreciated by persons skilled in the art that the above embodiments are provided for clarity of illustration only and are not intended to limit the scope of the application. Other variations or modifications will be apparent to persons skilled in the art from the foregoing disclosure, and such variations or modifications are intended to be within the scope of the present application.
Claims (8)
1. The hole wall device for the modularized wind tunnel test is characterized by comprising modularized wall plates (1) formed by at least one substrate (101), wherein the plurality of substrates (101) are arranged in a rectangular array, a plurality of air inlet channels (102) are formed in each substrate (101), contraction mechanisms are arranged in the plurality of air inlet channels (102), cover plates (2) for tightly pressing the plurality of contraction mechanisms one by one are further arranged on the outer sides of the substrates (101), and ventilation holes (201) corresponding to the air inlet channels (102) are formed in the cover plates (2);
kong Biban (3) is further installed on the inner side of the modularized wallboard (1), the hole wall board (3) is of an integral structure, the size of the hole wall board (3) corresponds to that of the modularized wallboard (1), and through holes (301) which correspond to the air inlet channels (102) one by one are formed in the hole wall board (3);
still include mounting bracket (4), mounting bracket (4) are including riser (401) that a plurality of intervals were arranged, and base plate (101) are fixed between two adjacent riser (401), and hole wall board (3) are installed on a plurality of riser (401) jointly.
2. A modular wind tunnel test aperture wall arrangement according to claim 1, wherein a reinforcing bar (402) is also connected between two adjacent risers (401).
3. The hole wall device for the modularized wind tunnel test according to claim 1, wherein the mounting frame (4) is further provided with a mounting structure, and the mounting structure comprises a mounting plate (403) mounted on the mounting frame (4) and a hook (404) mounted on the mounting plate (403).
4. A modular wind tunnel test aperture wall arrangement according to claim 3, wherein the mounting plate (403) further has a roller assembly (405) rotatably supported thereon.
5. A modular wind tunnel test hole wall device according to claim 3, wherein the number of hooks (404) on the mounting plate (403) is at least two, the number of hooks (404) is divided into two groups, and the two groups of hooks (404) are arranged oppositely along the width direction of the modular wall plate (1).
6. A modular wind tunnel test aperture wall arrangement according to claim 3, wherein the mounting structures are arranged in two groups, the two groups being symmetrically arranged along the central axis of the modular wall panel (1).
7. The hole wall device for the modularized wind tunnel test according to claim 1, wherein the plurality of air inlet channels (102) on the base plate (101) are uniformly distributed at intervals in a plurality of rows, and two adjacent rows of air inlet channels (102) are distributed in a staggered manner.
8. The hole wall device for the modularized wind tunnel test according to claim 1, wherein the base plate (101) and the cover plate (2) are made of 7075 aviation aluminum.
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| CN202210066575.8A CN114509232B (en) | 2022-01-20 | 2022-01-20 | Hole wall device for modularized wind tunnel test |
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| CN115493795B (en) * | 2022-11-16 | 2023-01-31 | 中国航空工业集团公司沈阳空气动力研究所 | Variable-angle mechanism multi-profile dynamic sealing device and using method |
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