CN115077847B - Guide support device for wind tunnel body - Google Patents
Guide support device for wind tunnel body Download PDFInfo
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- CN115077847B CN115077847B CN202210995810.XA CN202210995810A CN115077847B CN 115077847 B CN115077847 B CN 115077847B CN 202210995810 A CN202210995810 A CN 202210995810A CN 115077847 B CN115077847 B CN 115077847B
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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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- Fluid Mechanics (AREA)
- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention relates to a guide support device for a wind tunnel body, and belongs to the technical field of aerodynamic wind tunnel tests. The problem that the wind tunnel is difficult to bear the lateral force of a large wind tunnel when the wind tunnel is installed in the traditional bridge support form is solved. The wind tunnel comprises a lower connecting plate, a lower end guide piece, an upper end guide piece, a connecting plate and a sliding body, wherein the lower connecting plate is connected with a pre-buried steel plate, the lower connecting plate is connected with the sliding body through the lower end guide piece, the upper portion of the upper end guide piece is provided with the connecting plate, the connecting plate is connected with a wind tunnel body, the center of the upper end guide piece is provided with a sliding groove, and the upper portion of the sliding body is connected with the upper end guide piece through the sliding groove. The device has excellent bearing capacity and positioning accuracy, can bear huge load of a large wind tunnel, has excellent rigidity characteristic, and ensures that the axial degree axis of the wind tunnel is maintained within the range of 0.002 ℃.
Description
Technical Field
The invention relates to a guide support device for a wind tunnel, and belongs to the technical field of aerodynamic wind tunnel tests.
Background
The wind tunnel is a large-scale structure for simulating the flow test environment of an aircraft, the flow field quality has high requirements, the power section generally has an independent fixed foundation, in order to enable the airflow direction to coincide with the power direction, the size of the wind tunnel structure is large, the wind tunnel body needs to bear the effects of gravity, pressure and temperature load at the same time, in order to ensure that the wind tunnel has good flow field quality and structural characteristics, a support needs to be installed under the wind tunnel body, and for the bearing of gravity, a bridge support is generally adopted.
Therefore, it is desirable to provide a guiding support device for a wind tunnel body to solve the above technical problems.
Disclosure of Invention
The invention solves the problem that the wind tunnel is difficult to bear the lateral force of a large wind tunnel when the wind tunnel is installed in the traditional bridge bearing form. The following presents a simplified summary of the invention in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to determine the key or important part of the present invention, nor is it intended to limit the scope of the present invention.
The technical scheme of the invention is as follows:
the utility model provides a wind-tunnel is guide support device for hole body, includes lower connecting plate, lower extreme guide, upper end guide, connecting plate and gliding mass, and lower connecting plate is connected with pre-buried steel sheet, is connected with the gliding mass through lower extreme guide on the lower connecting plate, and the upper portion of upper end guide is provided with the connecting plate, and connecting plate and wind-tunnel hole body coupling, the center of upper end guide is provided with the spout, and the upper portion of gliding mass is passed through the spout and is connected with the upper end guide.
Preferably: the spout is the ladder groove, and the connecting plate is the arc that corresponds the setting with the wind-tunnel cave body.
Preferably: the wind tunnel is an annular wind tunnel, the number of the guide support devices for the wind tunnel body is 2, and the guide support devices for the wind tunnel body are respectively arranged at the lower part of the wind tunnel second corner and the wind tunnel fourth corner.
Preferably: the installation flatness of the lower connecting plate is not more than 1/1000.
Preferably: the sliding body and the sliding groove are in clearance fit, the clearance is less than 0.05mm, and the sliding body and the sliding groove are subjected to rust-proof and wear-resistant treatment.
Preferably: and determining the height of the chute according to the slippage corresponding to the position of the hole in the finite element calculation result. Preferably, the following components: when finite element calculation is carried out, firstly, a wind tunnel body model is established in an ANSYS DesgignModulator, grids are divided in ANSYS Mechanical software, constraints and loads are loaded according to working condition load conditions to form a finite element calculation model, the model is solved, a displacement cloud chart in a result is checked, and the position of a support is found and component values of deformation in all directions of the support are checked.
The invention has the following beneficial effects:
the device has excellent bearing capacity and positioning accuracy, can bear the huge load (the maximum load can reach 190 tons of force) of a large wind tunnel, has excellent rigidity characteristic, and ensures that the axial degree axis of the wind tunnel is maintained within the range of 0.002 ℃;
the device hardly bears the gravity, so that the interference of the guide device on the bearing of the gravity support is avoided, and the quality of a wind tunnel flow field is guaranteed;
the device has low cost and longer life cycle;
the device has reasonable design and reliable rigidity and strength.
Drawings
FIG. 1 is a schematic structural view of a guiding support device for a wind tunnel body according to the present invention;
FIG. 2 is a perspective view of a guide support device for a wind tunnel body according to the present invention;
FIG. 3 is a layout view of a guide support device for a wind tunnel body;
FIG. 4 is an overall deformation cloud chart of the wind tunnel under the rated load;
FIG. 5 is a displacement cloud chart of a guiding support device for a wind tunnel body under the action of a rated side load (190 tons of force);
FIG. 6 is a stress cloud chart of a guide support device for a wind tunnel body under the action of a rated side load (190 tons force);
in the figure, 1-a lower connecting plate, 2-a lower end guide part, 3-an upper end guide part, 4-a connecting plate, 5-a sliding groove, 6-a sliding body, 7-a wind tunnel axis, 8-a wind tunnel body, 9-a pre-buried steel plate, 10-a guide support, 11-a gravity support, 12-a wind tunnel two-crank, 13-a wind tunnel four-crank, 14-a wind tunnel one-crank, 15-a first diffusion section, 16-a parking chamber, 17-a stabilizing section, 18-a wind tunnel three-crank, 19-a heat exchanger, 20-a second diffusion section and 21-a short axis direction.
Detailed Description
In order that the objects, aspects and advantages of the invention will become more apparent, the invention will be described by way of example only, and in connection with the accompanying drawings. It is to be understood that such description is merely illustrative and not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The first specific implementation way is as follows: the embodiment is described with reference to fig. 1 to 6, and the guide support device for the wind tunnel body of the embodiment comprises a lower connecting plate 1, a lower end guide 2, an upper end guide 3, a connecting plate 4 and a sliding body 6, wherein the lower connecting plate 1 is in bolt connection with an embedded steel plate 9, the lower connecting plate 1 is fixedly connected with the sliding body 6 through the lower end guide 2, the upper part of the upper end guide 3 is provided with the connecting plate 4, after the central line of the connecting plate 4 is adjusted, the connecting plate 4 is welded with the outer shell of the wind tunnel body 8, the center of the upper end guide 3 is provided with a sliding chute 5, and the upper part of the sliding body 6 is in sliding connection with the upper end guide 3 through the sliding chute 5; the upper end guide part 3 is connected with the wind tunnel body through the connecting plate 4, the lower end guide part 2 is connected with a civil foundation, the sliding body 6 can move up and down under the action of the sliding chute 5, which is essentially equivalent to providing a lateral surface constraint and a lateral surface constraint to bear lateral loads and bending moments generated by pressure and temperature; a rib plate is arranged between the lower end guide part 2 and the lower connecting plate 1, and a rib plate is arranged between the upper end guide part 3 and the connecting plate 4, so that the rigidity and the strength of the device are ensured, and the device cannot generate overlarge elastic displacement; the device has excellent bearing capacity and positioning accuracy, can bear huge load (maximum 190 tons of force) of a large wind tunnel, has excellent rigidity characteristic, and ensures that the 7-axis degree of the wind tunnel axis is maintained within the range of 0.002 degree; the wind tunnel axis 7 axis degree is verified by carrying out finite element structure simulation calculation results, and the specific method is as follows: firstly, establishing a simulation model in finite element software (ANSYS), dividing grids and assigning material attributes by adopting a form of entity units, applying 190-ton force load to a guide support, and applying fixed constraint to the bottom surface of the guide support to obtain the deformation condition and the displacement condition of the guide support, wherein the calculation result shows that as shown in figure 5, under the action of the 190-ton force lateral load, the maximum deformation of the support is only 0.01mm, the displacement of the support is very small under the action of a rated lateral load, and the guide support is proved to have excellent rigidity performance; when the deformation of the support is lower than 0.1mm under load, the deflection angle of the wind tunnel axis under the lateral load can be ensured to be less than 0.002 degree; similarly, the results of the finite element simulation of the structure are verified, as shown in fig. 6, the maximum stress of the guide support structure is 103.3MPa and is lower than the allowable material stress 178MPa under the action of the 190 ton force side load, which indicates that the guide support can bear the 190 ton force side load and has excellent bearing capacity;
the sliding groove 5 is a stepped groove, and the connecting plate 4 is an arc shape which is arranged corresponding to the outer shell of the wind tunnel body; the sliding body 6 can not collide with the connecting plate 4 when sliding in the sliding groove 5, so that the influence on the wind tunnel body is reduced; the device hardly bears the gravity, so that the guide device is prevented from interfering the bearing of the gravity support 11; the special-shaped connecting plate 4 is designed through a special shape, the upper edge of the special-shaped connecting plate 4 is an arc-shaped plate with the same radius as the wind tunnel body shell, and the special-shaped connecting plate can be matched and installed with the wind tunnel to fit with the wind tunnel body shape and realize stable connection; the reason why the device does not bear the gravity is that, as shown in figure 5, a larger gap exists between the sliding body 6 and the sliding chute 5 in the gravity direction, and the load in the gravity direction cannot be transferred between the upper part and the lower part of the guide support, because the wind tunnel is a multi-support system, the number of supports bearing the load in the gravity direction is large, the more the supports are, the higher the difficulty of accurately predicting the bearing distribution of the supports is, and meanwhile, the more the interference generated between the supports under the action of temperature load is, so that the guide support does not bear the load in the gravity direction, the interference on other gravity supports can be avoided, and the safety of the wind tunnel support is favorably ensured;
the wind tunnel is an annular wind tunnel, the number of the guide support devices for the wind tunnel body is 2, the guide support devices for the wind tunnel body are respectively arranged at the central axis position of the lower part of the second crank 12 of the wind tunnel and the central axis position of the lower part of the fourth crank 13 of the wind tunnel, and the position indicated by the guide support 10 shown in the attached figure 3 is the installation position of the guide support devices for the wind tunnel body; beside the guide support 10, there are two gravity supports 11 which only bear gravity and are arranged as shown in fig. 3; because the wind tunnel is of a square structure, the wind tunnel two-corner 12, the wind tunnel one-corner 14, the first diffusion section 15, the parking chamber 16, the stabilizing section 17, the wind tunnel four-corner 13, the wind tunnel three-corner 18, the heat exchanger 19 and the second diffusion section 20 are sequentially connected to form a square wind tunnel, the gravity support 11 is arranged under the action of pressure and temperature, the corner of the wind tunnel can generate large lateral displacement, the lateral displacement of the tunnel body structure is limited by the device, the lateral displacement refers to the translation of the short axis direction 21 of the wind tunnel, as shown in figure 3, the device can limit the lateral freedom degree of the tunnel body and the rotation freedom degree in the horizontal plane, the freedom degrees in other directions are released, the gravity at the bottom of the two-corner of the wind tunnel can not generate interference on the support bearing, and the flow field quality of the wind tunnel is guaranteed;
the installation flatness of the lower connecting plate 1 is not more than 1/1000; the excellent positioning precision is mainly realized through two aspects, namely, the mounting flatness of the connecting plate is not more than 1/1000, the clearance amount of the fit clearance between the sliding body 6 and the side wall of the sliding groove 5 is extremely small (less than 0.05 mm), the higher flatness can ensure that the guide support does not generate larger deflection angle errors, the smaller clearance amount can ensure that the guide support does not have larger lateral translation errors, and through the combined action of the two aspects, the stronger rigidity of the support is matched, the support can be ensured to be accurately maintained at a preset position (the comprehensive deviation is less than 0.1 mm), so that the accurate position of the axis of the wind tunnel is ensured, and the guide support has good positioning precision;
the sliding body 6 and the sliding groove 5 are in clearance fit, the clearance is less than 0.05mm, and the sliding body 6 and the sliding groove 5 are subjected to rust-proof and wear-resistant treatment; the device has a long life cycle, the replacement cost of a general large wind tunnel support is high, and abrasion is a main reason causing the failure of the guide support, so that on one hand, the generation of friction force is reduced through high-precision processing and assembling, and on the other hand, the abrasion-resistant treatment is adopted on the contact surface, so that the support is ensured to have a long life cycle; the reason is that the slide body 6 and the chute 5 are subjected to rust-proof and wear-resistant treatment, and the guide support needs to slide under the condition of bearing pressure, so that the reduction of flatness and the increase of gaps caused by rust and wear are main causes of support failure, and after the rust-proof and wear-resistant treatment, the service life of the support can be greatly prolonged, and the maintenance cost is reduced;
determining the height of the sliding chute 5 according to the slippage of the position of the corresponding hole in the finite element calculation result, and obtaining a displacement cloud chart shown in the attached figure 4;
the finite element calculation and displacement viewing are briefly described as follows: firstly, establishing a shell model of the wind tunnel in an ANSYS DesgignModulator, dividing grids in ANSYS Mechanical software, loading constraints and loads according to working condition load conditions to form a finite element calculation model, solving the model, checking a displacement cloud chart in a result, finding a support position and checking component values of deformation of the support in all directions; the load and the slippage at the installation position of the device are accurately evaluated, the length and the thickness of the sliding chute 5 and the sliding body 6 are designed according to the load information in the result, the two key parameters directly influence the rigidity performance and the strength performance of the support, and reasonable numerical values are designed to ensure that the device has reliable rigidity and strength; meanwhile, according to the deformation information in the finite element calculation result, the length allowance of the sliding groove 5 can be designed, the sliding body 6 is prevented from moving out of the sliding groove 5, and rigidity loss and strength risk are prevented.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be discussed further in subsequent figures.
In the description of the present invention, it is to be understood that the directions or positional relationships indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the directions or positional relationships shown in the drawings, and are for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present invention; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.
For ease of description, spatially relative terms such as "over … …", "over … …", "over … …", "over", etc. may be used herein to describe the spatial positional relationship of one device or feature to another device or feature as shown in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" may include both orientations of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the accompanying drawings are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.
It should be noted that, in the above embodiments, as long as the technical solutions can be aligned and combined without contradiction, those skilled in the art can exhaust all possibilities according to the mathematical knowledge of the alignment and combination, and therefore, the present invention does not describe the technical solutions after alignment and combination one by one, but it should be understood that the technical solutions after alignment and combination have been disclosed by the present invention.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The utility model provides a wind-tunnel is direction support device for body which characterized in that: the device comprises a lower connecting plate (1), a lower end guide piece (2), an upper end guide piece (3), a connecting plate (4) and a sliding body (6), wherein the lower connecting plate (1) is connected with an embedded steel plate, the lower connecting plate (1) is connected with the sliding body (6) through the lower end guide piece (2), the upper part of the upper end guide piece (3) is provided with the connecting plate (4), the connecting plate (4) is connected with a wind tunnel body, the center of the upper end guide piece (3) is provided with a sliding chute (5), and the upper part of the sliding body (6) is connected with the upper end guide piece (3) through the sliding chute (5);
the sliding body (6) and the sliding chute (5) are in clearance fit, the clearance is less than 0.05mm, and the sliding body (6) and the sliding chute (5) are subjected to rust-proof and wear-resistant treatment;
determining the height of the sliding chute (5) according to the slippage of the position of the corresponding hole in the finite element calculation result;
when finite element calculation is carried out, firstly, a wind tunnel body model is established in an ANSYS DesgignModulator, grids are divided in ANSYS Mechanical software, constraints and loads are loaded according to working condition load conditions to form a finite element calculation model, the model is solved, a displacement cloud chart in a result is checked, and component values of deformation of a support in all directions are found and checked;
under the action of a lateral load with 190 tons of force, the maximum deformation of the support is only 0.01mm, and the deflection angle of the wind tunnel axis under the lateral load can be ensured to be less than 0.002 ℃;
the guide support does not bear the load in the gravity direction, so that the interference to other gravity supports can be avoided, and the safety of the wind tunnel support is favorably ensured.
2. The guide support device for the wind tunnel body according to claim 1, wherein: the sliding groove (5) is a stepped groove, and the connecting plate (4) is arc-shaped and corresponds to the wind tunnel body.
3. The guide support device for the wind tunnel body according to claim 1, wherein: the wind tunnel is an annular wind tunnel, the number of the guide support devices for the wind tunnel body is 2, and the guide support devices for the wind tunnel body are respectively arranged at the lower part of the second corner of the wind tunnel and the lower part of the fourth corner of the wind tunnel.
4. The guide support device for the wind tunnel body according to claim 1, wherein: the installation flatness of the lower connecting plate (1) is not more than 1/1000.
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| CN202210995810.XA CN115077847B (en) | 2022-08-19 | 2022-08-19 | Guide support device for wind tunnel body |
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| CN202210995810.XA CN115077847B (en) | 2022-08-19 | 2022-08-19 | Guide support device for wind tunnel body |
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