CN115791069A - Device with position-adjustable sealing spray pipe in wind tunnel test and application method - Google Patents
Device with position-adjustable sealing spray pipe in wind tunnel test and application method Download PDFInfo
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- CN115791069A CN115791069A CN202310027379.4A CN202310027379A CN115791069A CN 115791069 A CN115791069 A CN 115791069A CN 202310027379 A CN202310027379 A CN 202310027379A CN 115791069 A CN115791069 A CN 115791069A
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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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
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Abstract
The invention discloses a device with an adjustable position of a sealing spray pipe in a wind tunnel test and an application method, and relates to the field of wind tunnel tests, the device comprises a parking chamber, wherein one side of the parking chamber is provided with a gas source input hole connected with a tail support rod, the upper end of the parking chamber is provided with a columnar through installation part, the interior of the parking chamber is provided with a gas chamber for communicating the gas source input hole with the through installation part, the installation part is internally provided with a spray pipe, and the spray pipe is provided with a cover plate matched with a model; wherein, the outer diameter of the spray pipe is configured to match with the maximum inner diameter of the air chamber, and the inner diameter of the through mounting part is configured to be 1-2mm larger than the outer diameter of the spray pipe. The invention provides a device with an adjustable position of a sealing spray pipe in a wind tunnel test and an application method thereof.
Description
Technical Field
The invention relates to the field of wind tunnel tests. More particularly, the invention relates to a device with an adjustable position of a sealing nozzle in a wind tunnel jet test used in the wind tunnel jet test condition and an application method thereof.
Background
Jet test technology is a test method commonly used in wind tunnels, and different jet combinations are generally realized by replacing a nozzle. The position of the nozzle relative to the mold is fixed so that the position of the nozzle is immovable during processing of the chamber. In the actual operation process, the supporting rod is responsible for jetting, standing and positioning the chamber, the balance is responsible for positioning the model, but errors can exist in the axial direction during processing, and meanwhile, the heat insulation sleeve between the model and the balance can be extruded and deformed, so that the factors for determining the mutual positions of the model and the spray pipe become unclear. In the jet flow test, when the nozzle and the model are required to be not interfered, a gap needs to be formed between the nozzle and the model, and corresponding distance adjustment needs to be carried out.
There are two ways to adjust this distance: firstly, the model is developed from a model, including reinstallation and model repair, but the reinstallation of the model affects repeatability precision and delays the test progress; secondly, starting from the position of the spray pipe, the position of the spray pipe is slightly adjusted, and the relative position of the model and the spray pipe meets the requirement under the condition of not changing much, but the mode requires that the installation position of the spray pipe or the installation position of the parking chamber can be adjusted.
Disclosure of Invention
An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.
In order to realize the purposes and other advantages of the invention, the invention provides a device with an adjustable position of a sealing spray pipe in a wind tunnel test, which comprises a parking chamber, wherein one side of the parking chamber is provided with an air source input hole connected with a tail support rod, the upper end of the parking chamber is provided with a columnar through installation part, the interior of the parking chamber is provided with an air chamber for communicating the air source input hole with the through installation part, the installation part is internally provided with a spray pipe, and the spray pipe is provided with a cover plate matched with a model;
wherein, the outer diameter of the spray pipe is configured to match with the maximum inner diameter of the air chamber, and the inner diameter of the through mounting part is configured to be 1-2mm larger than the outer diameter of the spray pipe.
Preferably, the nozzle is provided with an annular projection which is matched with the mounting part.
Preferably, a hollow red copper gasket is arranged between the annular convex part and the mounting part, and the excircle of the annular convex part is smaller than that of the mounting part;
the spray pipe and the washer are fixed on the mounting part through matched compression bolts.
Preferably, the inner circumference of the washer is configured to be larger than the inner circumference of the mounting portion, and the outer circumference of the washer is configured to be smaller than the outer circumference of the mounting portion.
Preferably, the cover plate is provided with an inner hole for installing the spray pipe, and the diameter of the inner hole is 1-2mm larger than the outer diameter of the spray pipe.
Preferably, the device further comprises a sleeve matched with the compression bolt;
wherein the outer diameter of the sleeve is configured to be smaller than the short side of the equal straight section of the cover plate, and the height of the sleeve is configured to be larger than the matching height of the cover plate and the spray pipe;
a multi-surface groove matched with the external structure of the compression bolt is formed in the sleeve.
Preferably, the upper end of the sleeve is provided with a through hole into which the adjusting rod can be inserted.
An application method of a device with an adjustable position of a sealing spray pipe in a wind tunnel test comprises the following steps:
s1, installing a resident room in place;
s2, mounting the model to determine the position of the model, wherein a cover plate at the spray pipe is not mounted temporarily;
s3, uniformly coating sealant on two end faces of the gasket, placing the gasket on an installation part of the parking chamber, and ensuring the gasket and the installation part to be concentric;
s4, placing the spray pipe on the washer, but temporarily not installing the compression nut;
s5, covering the model cover plate to check whether the spray pipe is positioned near the center position of the inner hole on the cover plate, if the deviation is too much, opening the cover plate, and readjusting the position of the spray pipe;
s6, after the position of the spray pipe is determined, fixing the position of the spray pipe through a compression bolt;
and S7, carrying out air tightness detection, and installing a model cover plate and finishing model assembly after determining sealing.
Preferably, in S6, the method of installing the pressure bolt includes:
s61, after the position of the spray pipe is determined, uncovering the cover plate, and extending the sleeve into the inner hole to be matched with the external structure of the compression bolt;
s62, fixing the compression bolt through the adjusting rod rotating sleeve inserted into the through hole;
and S63, taking out the sleeve and covering the cover plate to finish the model installation.
The invention at least comprises the following beneficial effects: the invention provides a device capable of adjusting the position of a sealing spray pipe, which can slightly adjust the relative position of the spray pipe and a model (the single-side adjustment amplitude is less than 1 mm) on the premise of not influencing the ventilation and sealing of the spray pipe, and can ensure that the central axis of the spray pipe is vertical to the surface of the model when the spray pipe is installed in a bolt pressing mode.
The application range of the device with the position-adjustable sealing nozzle is mainly directed at the situation that when a model and the nozzle are interfered in a wind tunnel test, the position of the nozzle needs to be moved in order to reduce the number of times of disassembling the model, and the device with the position-adjustable sealing nozzle can achieve noninterference of the model and the nozzle by using the adjusting mode, so that the installation of the model and the sealing of jet flow are effectively guaranteed.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic view of a device for adjusting the position of a sealing nozzle according to an embodiment of the present invention;
FIG. 2 is a schematic view of one of the cross-sectional structures of FIG. 1;
FIG. 3 is a schematic view of the structure of FIG. 2 from another perspective;
FIG. 4 is another schematic cross-sectional view of FIG. 1;
FIG. 5 is a schematic view of the structure of FIG. 4 from another perspective;
FIG. 6 is a schematic view of the sleeve of the present invention engaged with a device for adjusting the position of a sealing nozzle;
FIG. 7 is a schematic cross-sectional view of FIG. 6;
the device comprises a standing chamber-1, a spray pipe-2, an air source input end-3, a through mounting part-4, an air chamber-5, a compression bolt-6, a cover plate-7, an inner hole-8, a circular platform-9, a red copper gasket-10, a sleeve-11, a multi-surface groove-12 and a through hole-13.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It is to be understood that in the description of the present invention, the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are used only for convenience in describing the present invention and for simplification of the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise specifically stated or limited, the terms "mounted," "disposed," "sleeved/connected," "connected," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection through an intermediate medium, and a communication between two elements.
According to the existing wind tunnel test result, the position of the spray pipe and the position of the model are slightly changed, so that the jet flow interference measurement is basically not influenced, but the installation efficiency of the model is greatly improved. The invention provides a device with an adjustable position of a sealing spray pipe in a wind tunnel test, as shown in figures 1-5, the device comprises a parking chamber 1 which is a supporting and air supplying mechanism of the spray pipe 2, an air source input end 3 is arranged at one side of the parking chamber, the position is generally connected with a tail support rod, a columnar through installation part 4 (also called as an installation platform) is arranged at the upper end of the parking chamber, the platform is used for sealing, an air chamber 5 which is used for communicating an air source input hole with the through installation part is arranged in the parking chamber, the spray pipe is arranged in the installation part, the excircle of the installation part is used for being connected with a compression bolt 6, the material is generally selected from 30CrMnSia, modulation and forging, a cover plate 7 which is matched with a model is arranged on the spray pipe, compared with the prior art, when the position of the spray pipe is adjusted, the model is not required to be disassembled, the validity of adjusting the device by registering to the opposite end is ensured, an inner hole 8 of the spray pipe is arranged on the cover plate, and the outer diameter of the spray pipe is 1-2mm larger than the outer diameter of the spray pipe;
the nozzle is a hollow aeration component, and the inner profile comprises a contraction section, a throat and a standing chamber; the external profile is a cylinder, the middle section is provided with a thin round platform 9 (namely an annular convex part matched with the mounting part) for sealing and limiting the upper and lower positions of the spray pipe, and the material is generally 30CrMnSia, modulated and forged;
the outer diameter of the spray pipe is matched with the maximum inner diameter of the air chamber, and the inner diameter of the through mounting part is 2mm larger than the outer diameter of the spray pipe, so that the position of the later spray pipe can be quantitatively adjusted.
A hollow red copper gasket 10 is provided between the annular protrusion and the mounting portion, said gasket being a hollow venting member for nozzle mounting sealing. The gasket is a cylinder, and is of a flat structure, and the inside and the outside of the gasket are both cylinders. The size of the inner circle of the gasket is larger than that of the inner circle of the chamber ventilation platform; the size of the outer circle of the gasket is smaller than that of the ventilation platform. One plane of the gasket is connected with the mounting platform of the chamber, and the other plane of the gasket is connected with the spray pipe. The material is generally selected from red copper and annealed.
The clamp bolt of spray tube for clamp washer and spray tube, the bolt outside is the polygon, makes things convenient for the chucking spanner, and inside sets up the screw thread, links to each other with the mounting platform who resides in the room.
Further, as shown in fig. 6-7, it also includes a sleeve 11 matching with the pressing bolt;
the outer diameter of the sleeve is configured to be smaller than the short edge of the equal straight section of the cover plate, so that the sleeve can enter the interior of the model from the position of the cover plate after the cover plate is removed, and the height of the sleeve is configured to be larger than the matching height of the cover plate and the spray pipe, so that the sleeve can be ensured to apply external force from the outer surface of the outer model to rotate the sleeve; if the sleeve is shorter than the cover plate, external force is not applied well;
the sleeve is internally provided with a multi-surface groove 12 matched with the external structure of the compression bolt, and the upper end of the sleeve is provided with a through hole 13 in which an adjusting rod can be inserted. In this scheme, during the model installation, the apron is installed at last, in order to tight spray tube gland nut, can adopt the spanner to go on. However, depending on the size of the model, the wrench may not be able to fit into the nozzle mounting space, and in this case, a socket may be used for installation. The sleeve is of a cylindrical structure, and the outer diameter of the sleeve is smaller than the minimum size of the cover plate, so that the sleeve can be placed in the inner cavity of the model; the whole height is higher than the cover plate height, so that the cover plate can be tightened outside. The inner size of the sleeve is matched with the spray pipe compression bolt; the use method of the sleeve comprises the following steps: after the position of the spray pipe is determined, uncovering the cover plate, and extending the sleeve into the model to be matched with the external structure of the compression bolt; the fixing of the compression bolt is completed through the adjusting rod rotating sleeve inserted into the through hole; taking out the sleeve and covering the cover plate to finish the installation of the model; however, in the wind tunnel test, the sleeve is not on the model.
A position adjusting method of a sealing spray pipe in a wind tunnel test is realized by utilizing a parking chamber, the spray pipe, a gasket, a spray pipe compression bolt and the like, and sequentially comprises the following steps:
1. during model processing, the shape of the position of the spray pipe is processed into a cover plate mode, and the shape of the model at the spray pipe can be independently assembled and disassembled;
2. on the model cover plate, the diameter of an inner hole for installing the spray pipe is 2mm larger than the outer diameter of the spray pipe; the spray pipe can be round or rectangular, if the spray pipe is rectangular, the size of the hole is the same as that of the rectangular shape, and the rectangular shape is enlarged by 1mm;
3. installing the model, namely determining the position of the model, and temporarily not installing a cover plate at the spray pipe;
4. mounting a tail support rod, and mounting a resident room in place (the resident room is on the tail support rod);
5. uniformly coating the two planes of the gasket with sealant;
6. the gasket is placed on a platform of the room, and the inner circle of the gasket is required to be placed outside the inner circle of the platform;
7. the spray pipe is placed on the washer, and a spray pipe compression nut is not installed temporarily;
8. covering the model cover plate to check whether the spray pipe is positioned near the center of the spray pipe hole on the cover plate;
9. when the deviation is too much, the cover plate is opened, the position of a spray pipe is readjusted, and the central line of the spray pipe is close to the central line of the inner hole of the cover plate as far as possible;
10. after the position of the spray pipe is determined, the bolt is pressed; the spray pipe can be prevented from moving in a bolt pressing mode;
11. detecting air tightness;
12. and after the sealing is determined, installing a model cover plate and finishing the model assembly. In the scheme, the method is equivalent to the existing installation method, and can be suitable for modifying the relative position of the spray pipe and the model under the condition of not re-assembling and disassembling the model when the model slightly interferes with the spray pipe after the model is installed.
The above scheme is merely illustrative of a preferred example, and is not limiting. When the invention is implemented, appropriate replacement and/or modification can be carried out according to the requirements of users.
The number of apparatuses and the scale of the process described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be apparent to those skilled in the art.
While embodiments of the invention have been disclosed above, it is not intended to be limited to the uses set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.
Claims (9)
1. A device with an adjustable position of a sealing spray pipe in a wind tunnel test comprises a parking chamber, wherein one side of the parking chamber is provided with an air source input hole connected with a tail support rod, the upper end of the parking chamber is provided with a columnar through installation part, and the inside of the parking chamber is provided with an air chamber for communicating the air source input hole with the through installation part;
wherein, the outer diameter of the spray pipe is configured to match with the maximum inner diameter of the air chamber, and the inner diameter of the through mounting part is configured to be 1-2mm larger than the outer diameter of the spray pipe.
2. The device for adjusting the position of the sealing nozzle in the wind tunnel test according to claim 1, wherein the nozzle is provided with an annular projection matched with the mounting part.
3. The device for adjusting the position of the sealing nozzle in the wind tunnel test according to claim 2, wherein a hollow red copper gasket is arranged between the annular convex part and the mounting part, and the excircle of the annular convex part is smaller than that of the mounting part;
the spray pipe and the washer are fixed on the mounting part through matched compression bolts.
4. The device for adjusting the position of the sealing nozzle in the wind tunnel test according to claim 3, wherein the inner circle ruler of the gasket is configured to be larger than the inner circle size of the mounting portion, and the outer circle size of the gasket is configured to be smaller than the outer circle size of the mounting portion.
5. The device for adjusting the position of the sealing nozzle in the wind tunnel test according to claim 1, wherein the cover plate is provided with an inner hole for installing the nozzle, and the diameter of the inner hole is 1-2mm larger than the outer diameter of the nozzle.
6. The device for adjusting the position of the sealing nozzle in the wind tunnel test according to claim 5, further comprising a sleeve matched with the compression bolt;
wherein the outer diameter of the sleeve is configured to be smaller than the short side of the cover plate equal straight section, and the height of the sleeve is configured to be larger than the matching height of the cover plate and the spray pipe;
a multi-surface groove matched with the external structure of the compression bolt is formed in the sleeve.
7. The device for adjusting the position of the sealing nozzle in the wind tunnel test according to claim 6, wherein the upper end of the sleeve is provided with a through hole into which the adjusting rod can be inserted.
8. An application method of the device with the position adjustable of the sealing nozzle in the wind tunnel test according to any one of claims 1 to 7 is characterized by comprising the following steps:
s1, installing a resident room in place;
s2, mounting the model to determine the position of the model, wherein a cover plate at the spray pipe is not mounted temporarily;
s3, uniformly coating sealant on two end faces of the gasket, placing the gasket on an installation part of the parking chamber, and ensuring the gasket and the installation part to be concentric;
s4, placing the spray pipe on the washer, but temporarily not installing the compression nut;
s5, covering the model cover plate to check whether the spray pipe is positioned near the center position of the inner hole on the cover plate, if the deviation is too much, opening the cover plate, and readjusting the position of the spray pipe;
s6, after the position of the spray pipe is determined, fixing the position of the spray pipe through a compression bolt;
and S7, carrying out air tightness detection, and installing a model cover plate and finishing model assembly after determining sealing.
9. The application method of the device with the position-adjustable sealing nozzle in the wind tunnel test as claimed in claim 8, wherein in S6, the mounting method of the compression bolt comprises the following steps:
s61, after the position of the spray pipe is determined, uncovering the cover plate, and extending the sleeve into the inner hole to be matched with the external structure of the compression bolt;
s62, fixing the compression bolt through the adjusting rod rotating sleeve inserted into the through hole;
and S63, taking out the sleeve and covering the cover plate to finish the model installation.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202310027379.4A CN115791069B (en) | 2023-01-09 | 2023-01-09 | Device with position-adjustable sealing spray pipe in wind tunnel test and application method |
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| CN202310027379.4A CN115791069B (en) | 2023-01-09 | 2023-01-09 | Device with position-adjustable sealing spray pipe in wind tunnel test and application method |
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| CN115791069B CN115791069B (en) | 2023-04-11 |
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| CN115791069B (en) | 2023-04-11 |
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