CN115839816A - Replacement device and replacement method for large high-speed wind tunnel model supporting mechanism - Google Patents
Replacement device and replacement method for large high-speed wind tunnel model supporting mechanism Download PDFInfo
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- CN115839816A CN115839816A CN202211498378.XA CN202211498378A CN115839816A CN 115839816 A CN115839816 A CN 115839816A CN 202211498378 A CN202211498378 A CN 202211498378A CN 115839816 A CN115839816 A CN 115839816A
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Abstract
The invention discloses a replacing device and a replacing method for a large-scale high-speed wind tunnel model supporting mechanism, and aims to solve the problems that the existing device for replacing the model supporting mechanism has high overall mass, high control difficulty, incapability of realizing fine position control and the like. The device comprises a middle support supporting plate, a supporting component for supporting the middle support supporting plate, a baffle, a lifting adjusting device and a connecting component; the supporting component comprises universal wheels, a bottom plate, vertical plates and inclined ribs, the universal wheels are arranged below the bottom plate, the bottom plate can be driven by the universal wheels to move, the vertical plates are arranged on the bottom plate, the bottom plate can provide support for the vertical plates, two ends of the inclined ribs are respectively connected with the bottom plate and the vertical plates, and the inclined ribs, the bottom plate and the vertical plates are arranged in a triangular mode. The quick replacement of the model supporting mechanism can be realized, and the working efficiency is greatly improved. Simultaneously, this application can compromise the model supporting mechanism change work of multiple configuration, has better adaptability.
Description
Technical Field
The application relates to the field of aerospace wind tunnel tests, in particular to a replacing device and a replacing method for a large-scale high-speed wind tunnel model supporting mechanism. This application can realize model supporting mechanism's quick replacement, promotes work efficiency, and this change device has higher adaptability, can compromise the model supporting mechanism change work of multiple configuration.
Background
The wind tunnel test is mainly implemented according to a relative motion principle, namely, compared with the actual flight, the aircraft moves in a relatively static atmospheric environment at a certain speed; in wind tunnel testing, aircraft models are usually mounted on a fixed support structure, with the air flow upstream of the model flowing through the model at a certain velocity. The change of the attitude angle of the model relative to the wind tunnel incoming flow can be realized through the movement of the model supporting mechanism.
Fig. 1 shows a model supporting device commonly used in a high-speed wind tunnel at present. The basic structure form of the model supporting device is a curved knife form and is divided into an upper support, a middle support and a lower support. The middle support is positioned in the wind tunnel flow field environment, and the model is connected with the middle support through a support rod. The middle support is respectively connected with the upper support and the lower support through screws and pins to connect the three parts into a whole. The motion control mechanism drives a piston rod connected with the upper support to perform telescopic motion, so that the whole model supporting device moves along an arc guide rail arranged on the test section frame, and the change of the pitch angle of the model is further realized. Because the model is mainly supported in the wind tunnel through the middle bracket, generally, the replacement of the model supporting mechanism mainly refers to the replacement of the middle bracket, and the upper bracket and the lower bracket are not replaced generally. Fig. 2 shows a structural diagram of the middle bracket, and it can be seen that: the connecting surfaces of the bracket and the upper bracket and the lower bracket are respectively in a step-type lap joint mode; in order to ensure that the model supporting mechanism has a smaller cross section area so as to reduce the blocking effect of the model supporting mechanism on airflow, except that the middle section of a middle bracket for supporting the model and arranging related cables adopts a cylinder-like structure with a slightly larger diameter, the rest parts all adopt blade structures. Meanwhile, the upper support and the middle support are connected in a pin and screw mode, screws are divided into an upper row and a lower row, one row of screw hole threads are located on the upper support, and the other row of screw hole threads are located on the middle support. The lower bracket is connected with the middle bracket in a similar way.
Different middle supports need to be replaced due to different requirements of different types of wind tunnel tests on the model support. For example, the air inlet test requires that the air flow passage in the middle section of the middle support should be large enough to realize the throttle regulating capability through a large range, so as to realize the function of regulating the flow of the air inlet. And the conventional force measurement test usually requires that a mechanical structure with rolling is arranged in the middle section of the middle support, and the change of the transverse angle of the model is realized through the matching of the pitching angle motion control capability of the model supporting mechanism.
On one hand, the middle bracket is exposed in the wind tunnel airflow environment for a long time and needs to repeatedly bear the impact of pneumatic load; on the other hand, in order to avoid the flow near the model being disturbed by the middle support, the distance between the model and the middle support is as far as possible, which results in that the pneumatic load borne by the model brings a large additional moment to the middle support. Therefore, the middle support has to ensure enough strength and rigidity, so that the self weight of the middle support is often larger; for wind tunnels above 1 meter level, the middle bracket of the wind tunnel cannot be replaced and installed manually, and corresponding replacement and installation must be realized through a special device.
The structural form of the device for replacing the model supporting mechanism is shown in figures 3-5; wherein, 1 is the universal wheel, 2 is the base, 3 is left bottom plate, 4 is the guide rail, 5 is left connecting plate, 6 is right connecting plate, 7 is right bottom plate. In the structure, the universal wheel is arranged below the base, so that the integral motion of the device is realized; the middle of the base is provided with a groove so as to enable the middle bracket to be inserted into the groove; the guide rail is arranged on the base, and the left connecting plate and the right connecting plate which are arranged on the guide rail can move along the direction of the guide rail; install left connecting plate, the right connecting plate on left bottom plate, right bottom plate respectively and possess certain altitude direction ascending regulatory ability to realize that the screw hole site on the connecting plate aligns with the hole site of middle part support. The left connecting plate is mainly used for temporarily connecting the upper bracket and the lower bracket when the current middle bracket takes out a new middle bracket and is not installed in place; if not having the left connecting plate to connect, the middle part support is taken out the back, and the lower part support is in the state of out of control, will rely on the dead weight to follow the guide rail gliding, can lead to serious accident, even if the gliding is not many, also can lead to after new middle part support targets in place, the lower part support rather than there being obvious positional deviation and the unable circumstances of connecting. The right connecting plate is mainly used for connecting the middle support and the device into a whole after the middle support is separated from the upper support and the lower support, and then conveying the middle support out of the hole for replacing the middle support.
The method for replacing the middle bracket by using the device comprises the following steps:
1. taking out the positioning pins respectively connected with the upper bracket and the lower bracket by the middle bracket;
2. the position of the universal wheel adjusting device is adjusted, so that the slotting of the base is aligned to the middle support as far as possible, and the adjustment workload of the subsequent left connecting plate and the right connecting plate along the direction of the guide rail is reduced;
3. pushing the device into the position of the middle support to enable the middle support to be positioned in the open groove of the base;
4. adjusting the position of the device along the axis of the wind tunnel to ensure that the screw hole positions on the connecting plate and the middle bracket are respectively consistent with the screw hole positions of the upper bracket and the lower bracket in the axis direction;
5. the upper row of screws and the lower row of screws which are closer to the central line of the middle support and used for connecting the supports are taken out, the screw caps of the two rows of screws are positioned on the middle support, the thread positions are respectively positioned on the upper support and the lower support, and the requirement that the left connecting plate is connected with the upper support and the lower support through the screws can be met;
6. adjusting the height of the left connecting plate to make the screw hole positions on the connecting plate consistent with those of the upper bracket and the lower bracket;
7. adjusting the position of the left connecting plate on the guide rail to ensure that the connecting plate is attached to the upper support and the lower support as much as possible;
8. the upper bracket, the left connecting plate and the lower bracket are connected into a whole by screws;
9. the upper row of screws and the lower row of screws which are far away from the central line of the middle support and used for connecting the supports are taken out, the screw caps of the two rows of screws are respectively positioned on the upper support and the lower support, and the thread positions are positioned on the middle support, so that the requirement that the right connecting plate is connected with the middle support through the screws can be met;
10. adjusting the position of the right connecting plate on the guide rail to ensure that the right connecting plate is attached to the middle support as much as possible;
11. the middle bracket and the right connecting plate are connected into a whole by screws; it should be noted that, because a series of mechanisms for adjusting height and enhancing strength and rigidity are designed at a position below the right connecting plate and close to the right bottom plate, interference is easily caused, and therefore, screw hole positions connected with screw holes below the middle bracket are not designed, namely, the middle bracket is connected with the right connecting plate by a row of screw holes above the middle bracket;
12. adjusting the position of the right connecting plate in the moving direction of the guide rail to enable the middle bracket to be separated from the installation position of the middle bracket;
13. moving the replacing device to a relatively open space integrally;
14. removing the middle support from the device by using a travelling crane, and hoisting the middle support to be replaced to the position near the device;
15. repeatedly adjusting the positions of the device and the travelling crane, aligning the screw hole positions of the new middle bracket and the right connecting plate and connecting the screw holes by screws; it should be noted that, because the traveling crane cannot realize precise adjustment, the step often needs to be adjusted repeatedly, sometimes even needs to connect a part of the screws first and then adjust the positions, and finally realizes the connection of all the screws;
16. the position of the device is adjusted through the universal wheel, so that the slotting position of the device is aligned to the mounting position of the middle support as much as possible, and the subsequent position adjustment work of the middle support is reduced;
17. pushing the device into the planned installation position of the new middle bracket;
18. adjusting the position of the device along the axis of the wind tunnel to ensure that the axial position of the middle bracket is basically consistent with the axial position of the planned installation position of the middle bracket;
19. adjusting the position of the right connecting plate on the guide rail and the height position of the right connecting plate to enable the new middle support to gradually enter the planned installation position of the new middle support;
20. as mentioned above, the middle bracket and the right connecting plate are not connected with each other by screws, therefore, the height position of the right connecting plate is adjusted to align the pin holes of the middle bracket and the lower bracket and align the connecting screw hole positions of the middle bracket and the lower bracket far away from the central line of the middle bracket, the middle bracket and the lower bracket are respectively connected by pins and screws, and the lower bracket and the new middle bracket are basically connected into a whole;
21. because the upper bracket is connected with the driving device of the model supporting device, the upper bracket cannot be out of control, after the left connecting plate is connected with the left bottom plate, the connecting screws of the left connecting plate, the upper bracket and the lower bracket are loosened, and the position of the left connecting plate on the guide rail is adjusted to be far away from the middle bracket, so that enough operating space flows out for the installation of subsequent screws;
22. adjusting the height position of the right connecting plate to make the pin holes of the middle bracket and the upper bracket aligned and then drive in the pin, and at the moment, the upper bracket, the new middle bracket and the lower bracket are basically connected into a whole;
23. installing a screw close to the middle line position of the new middle bracket for connecting the middle bracket with the upper bracket and the lower bracket;
24. taking out the connecting screw of the right connecting plate and the middle bracket, and connecting the connecting screw with the middle bracket and the upper bracket by using the connecting screw;
25. adjusting the position of the right connecting plate on the guide rail to enable the right connecting plate to be far away from the middle support;
26. the device is moved out of the area where the middle support is located, and the whole model supporting mechanism is replaced.
The current devices for model support mechanism replacement mainly have the following problems.
Firstly, the whole set of device is heavy in weight, which results in higher difficulty in controlling the position of the whole set of device, especially poor fine position control capability. The large weight of the whole device mainly comes from the following aspects: 1) The device comprises a large-size component; 2) The left connecting plate, the right connecting plate, the left connecting plate and the right connecting plate are large in size, and for a 2-meter wind tunnel, the middle support is almost as high as the test section; therefore, the height of the left connecting plate for connecting the upper support and the lower support or the right connecting plate for connecting the middle support is more than 1 meter, and the width of the connecting plate is basically consistent with that of the middle support and more than 1 meter for ensuring the connection of all screws.
Second, the center of gravity of the device is higher when the middle bracket is connected to the device. In order to ensure that a high center of gravity does not cause the entire device to topple, the spacing between the 4 universal wheels as support points should be as large as possible, which results in a large overall base size. Since these large-sized parts are the main load-bearing parts, not only weight reduction is not possible, but also additional reinforcement is required in many places, which results in a large weight of these parts themselves. In addition to this, the device is designed with a plurality of multi-degree-of-freedom adjustment devices, which are themselves subjected to limited loads. In order to ensure that the parts mounted on the support do not have problems when bearing heavy structures such as a middle support and the like, structures such as reinforcing rib plates and the like have to be additionally designed, and extra weight is increased. The problem with the large weight is that, despite the universal wheels, the entire set of devices is very difficult to control in terms of movement (in particular in terms of fine position control), and it often occurs that: the situation that the position is not proper when the slotted position of the device is inserted into the position of the middle support, the position of the device cannot be finely adjusted, the device has to be integrally withdrawn, and the device is pushed in again after the position is readjusted is difficult to find; so relapse, when increasing work load for the efficiency of changing middle part support is lower.
Furthermore, in order not to interfere the connection of the left connecting plate with the upper support and the lower support through the upper row of screws and the lower row of screws, the height of the base serving as the base of the whole device is small. As mentioned above, the middle bracket occupies most of the height of the test section, that is, the height of the base from the lower wall plate may be only 200mm to 300mm, and the center of gravity of the device is relatively low. When the left connecting plate is connected with the upper support and the lower support and is separated from the device, and the right connecting plate is connected with the middle support, if the middle support tilts, a larger additional moment is possibly generated due to the fact that the gravity center of the middle support and the gravity center of the device have a larger distance in the height direction, so that the whole device tilts, and the safety of personnel and equipment is seriously affected.
Third, the alignment of multiple screw hole locations is required when either the left connecting plate is connected to the upper and lower brackets, the right connecting plate is connected to the middle bracket, or a new middle bracket is connected to the right connecting plate when the middle bracket is removed, which is very difficult for devices lacking precise position control. This requires repeated adjustment of the mechanisms, which not only takes the experience of the worker into account, but also is a time-consuming and labor-intensive task.
Finally, the current set of devices is less versatile. The screw hole sites of the middle supports of different test sections may be different, so that the matched left connecting plate and right connecting plate need to be designed, otherwise, the replacement requirement cannot be met. In addition, the present apparatus is not applicable to a mold supporting apparatus of a half-bending blade structure (in contrast to the mold supporting apparatus shown in fig. 1, the mold supporting apparatus of a half-bending blade type is similar to a mold supporting apparatus including only a portion below a middle portion of a middle support in the drawing, a driving apparatus is connected to a lower support, and the lower support moves along a circular arc guide).
To this end, a new structure and/or device is urgently needed to solve one of the above problems.
Disclosure of Invention
As described above, the existing device for replacing the model supporting mechanism has the disadvantages of large overall mass, high control difficulty and incapability of realizing fine position control; when the middle support is connected with the device, the gravity center of the device is higher, a large-size base is needed to avoid the overturning problem caused by the center, and the replacement efficiency of the middle support is lower; when the right connecting plate is connected with the middle support, the gravity center of the middle support and the gravity center of the device have a larger distance in the height direction, and a larger additional moment is possibly generated, so that the whole device has the danger of overturning and has larger potential safety hazard; the device has poor universality and limited application range.
In view of the above problems, the present application provides a replacing device and a replacing method for a large-scale high-speed wind tunnel model supporting mechanism. This application can realize model supporting mechanism's quick replacement, improves work efficiency greatly. Simultaneously, this application can compromise the model supporting mechanism change work of multiple configuration, has better adaptability.
In order to achieve the purpose, the following technical scheme is adopted in the application:
a replacing device for a large-scale high-speed wind tunnel model supporting mechanism comprises a middle support supporting plate, a supporting component for supporting the middle support supporting plate, a baffle, a lifting adjusting device and a connecting component;
the supporting assembly comprises universal wheels, a bottom plate, vertical plates and inclined ribs, the universal wheels are arranged below the bottom plate and can drive the bottom plate to move, the vertical plates are arranged on the bottom plate and can support the vertical plates, two ends of each inclined rib are respectively connected with the bottom plate and the vertical plates, and the inclined ribs, the bottom plate and the vertical plates are arranged in a triangular mode;
the middle support supporting plate is U-shaped, a strip-shaped groove matched with the middle support is formed in the middle support supporting plate, and the middle support can be placed on the middle support supporting plate or taken down from the middle support supporting plate through the strip-shaped groove;
the baffle plate is connected with the middle support supporting plate and can rotate relative to the middle support supporting plate so as to open or close the strip-shaped groove on the middle support supporting plate; the lifting adjusting device is arranged on the middle support supporting plate and can adjust the position of the middle support placed on the middle support supporting plate along the vertical direction;
the number of the supporting components is four; the connecting assembly comprises a first reinforcing rib and a second reinforcing rib; the first reinforcing ribs are in a group, and two ends of each first reinforcing rib are respectively connected with the supporting component along the axial direction of the strip-shaped groove on the supporting plate of the middle support; the second reinforcing ribs are in a group along the axial direction vertical to the strip-shaped grooves on the support plate of the middle support, and two ends of each second reinforcing rib are respectively connected with the support assembly; the projection of the first reinforcing rib and the second reinforcing rib along the vertical direction is quadrilateral;
the supporting components are respectively positioned below four vertexes of the middle support supporting plate, and the four supporting components can provide support for the middle support supporting plate and drive the middle support supporting plate to move;
the width of the strip-shaped groove of the middle support supporting plate is greater than the thickness of the middle support blade, and the width of the strip-shaped groove of the middle support supporting plate is less than the width of the maximum cross section of the middle support;
the length of the strip-shaped groove of the middle support supporting plate is greater than that of the middle support.
The universal wheels are Mecanum wheels.
The vertical plate is vertically arranged on the bottom plate, and the inclined ribs, the bottom plate and the vertical plate are arranged in a right-angled triangle manner.
The first reinforcing ribs are in a group and are arranged in parallel; the second strengthening rib is a set of, the second strengthening rib is parallel to each other.
The axial direction of first strengthening rib is mutually perpendicular with the axial direction of second strengthening rib, the projection of first strengthening rib and second strengthening rib along vertical direction is the rectangle.
Four vertexes of the middle support supporting plate are respectively arranged at the top end of the vertical plate of the supporting component, and the supporting component can provide support for the middle support supporting plate.
The middle support supporting plate comprises a middle first supporting piece, a middle first connecting piece and a middle second supporting piece, the middle first supporting piece and the middle second supporting piece are parallel to each other, the middle first supporting piece and the middle first connecting piece are perpendicular to each other, the middle first supporting piece, the middle first connecting piece and the middle second supporting piece are sequentially connected and arranged in a U shape, and a strip-shaped groove is formed among the middle first supporting piece, the middle first connecting piece and the middle second supporting piece.
The length of the strip-shaped groove of the support plate of the middle support is 1.05 to 2.0 times of the length of the middle support.
The replacing method adopting the replacing device comprises the following steps:
(1) Taking out the positioning pins respectively connected with the upper bracket and the lower bracket by the middle bracket;
(2) Adjusting the position of the replacing device to ensure that the strip-shaped groove of the supporting plate of the middle bracket is aligned with the middle bracket as much as possible;
(3) Opening the baffle plate, and pushing the replacing device into the position of the middle bracket;
(4) The universal wheel is controlled to adjust the spatial position of the replacing device, so that the middle bracket is positioned in the middle of the replacing device as far as possible after falling down;
(5) Taking down the connecting screw of the middle bracket and the lower bracket; in order to prevent the lower bracket from freely sliding down due to out-of-control after the middle bracket is separated, a detached screw penetrates through a middle screw hole of which the screw thread is positioned on the lower bracket and the axis position is positioned on the lower bracket, the screw rod is ensured not to extend into the middle bracket, otherwise, the middle bracket cannot be taken out, the part which is not penetrated is supported by a jack, and the position between the lower bracket and the lower wall plate is prevented from falling down due to separation of the middle bracket;
(6) A detached screw penetrates through a middle screw hole with threads positioned on the middle support and an axis position positioned on the middle support, the screw rod is ensured not to extend into the lower support, and the part which is not penetrated is connected with the lifting adjusting device;
(7) Taking down the connecting screw of the middle bracket and the upper bracket;
(8) The middle bracket slowly falls onto a middle bracket supporting plate of the replacing device by controlling the telescopic amount of the lifting adjusting device;
(9) The left end and the right end of the strip groove of the middle support plate are connected by the baffle plate, so that the left-right branching deformation of the middle support plate caused by stress can be ensured, and the overturning of the middle support in the pitching direction can be avoided to a certain extent;
(10) The universal wheel is controlled to adjust the spatial position of the replacing device, so that the middle bracket is enabled to move transversely properly and is separated from the wind tunnel axis positions of the upper bracket and the lower bracket, and the interference between the middle bracket and the upper bracket and the lower bracket when the replacing device is withdrawn is avoided;
(11) Withdrawing the replacing device and the middle support from the position of the model supporting mechanism to a wide space;
(12) Removing the middle bracket from the replacing device by using a travelling crane, and placing the middle bracket to be installed on the replacing device;
(13) The spatial position of the replacing device is adjusted by controlling the universal wheel, so that the middle bracket is aligned to the planned installation position as much as possible, and the workload of adjusting the position in a limited space after the middle bracket reaches the predicted installation position is reduced;
(14) The spatial position of the replacing device is adjusted by controlling the universal wheel, and the height position of the middle bracket is adjusted by using the lifting adjusting device, so that the pin hole positions and the screw hole positions of the middle bracket and the upper bracket are aligned;
(15) Connecting the upper bracket and the middle bracket by using pins and screws;
(16) The pin hole positions and the screw hole positions of the middle bracket and the lower bracket are aligned by adjusting the telescopic amount of the jack;
(17) The middle bracket and the lower bracket are connected by pins and screws;
(18) Moving the device integrally out of the area where the middle support is located;
and finishing the replacement work of the whole model supporting mechanism.
In order to solve the problems, the application provides a replacing device and a replacing method for a large-scale high-speed wind tunnel model supporting mechanism. Wherein, should change the device and include middle part support backup pad, be used for providing the supporting component, baffle, lift adjustment device, coupling assembling that support for middle part support backup pad. Wherein, supporting component includes universal wheel, bottom plate, riser, diagonal muscle, and the universal wheel setting is in the bottom plate below, and the universal wheel can drive the bottom plate and remove. The vertical plate is arranged on the bottom plate, and the bottom plate can provide support for the vertical plate; the two ends of the inclined ribs are respectively connected with the bottom plate and the vertical plate, and the inclined ribs, the bottom plate and the vertical plate are arranged in a triangular mode. In this application, bottom plate, riser, diagonal bar weld each other and constitute wholly, as the support (supporting component) of whole device, and installation Mecanum wheel bottom every support sets up 4 supporting component altogether for the change device.
Furthermore, the supporting components are respectively positioned below the four vertexes of the middle support supporting plate, and the four supporting components can support the middle support supporting plate and drive the middle support supporting plate to move. Four summits of middle part support backup pad set up respectively on the top of the riser of supporting component and supporting component can provide the support for middle part support backup pad. Namely, 4 supports are respectively installed at four corner positions of the middle bracket supporting plate.
Furthermore, the middle support supporting plate is U-shaped, a strip-shaped groove matched with the middle support is arranged on the middle support supporting plate, namely, the middle of the middle support supporting plate is of a slotted structure. By adopting the structure, the middle bracket can be placed on the middle bracket supporting plate through the strip-shaped groove or taken down from the middle bracket supporting plate.
Meanwhile, the connecting assembly comprises a first reinforcing rib and a second reinforcing rib. The first reinforcing ribs are in a group, and two ends of each first reinforcing rib are respectively connected with the supporting component along the axial direction of the strip-shaped groove on the supporting plate of the middle bracket; the second reinforcing ribs are in a group along the axial direction vertical to the strip-shaped grooves on the support plate of the middle support, and two ends of each second reinforcing rib are respectively connected with the support assembly; the projection of the first reinforcing rib and the second reinforcing rib along the vertical direction is quadrilateral. Preferably, the first reinforcing ribs are in a group, and the first reinforcing ribs are arranged in parallel; the second strengthening rib is a set of, and the second strengthening rib is parallel to each other. The axial direction of first strengthening rib is mutually perpendicular with the axial direction of second strengthening rib, and the projection of first strengthening rib and second strengthening rib along vertical direction is the rectangle. In this application, utilize first strengthening rib will link together along two supports of fluting direction to increase the intensity of device in the fluting direction. And the two supports in the range of no longer grooving are connected together by using the second reinforcing rib so as to enhance the transverse strength of the device.
In this application, the baffle links to each other with middle part support backup pad, and the baffle can rotate in order to realize opening or closing middle part support backup pad upper strip groove relatively. The lifting adjusting device is arranged on the middle support supporting plate, and the lifting adjusting device can adjust the position of the middle support placed on the middle support supporting plate in the vertical direction. In the structure, the lifting adjusting device is used for controlling the middle bracket to slowly fall on the middle bracket supporting plate after the middle bracket is separated from the upper bracket; and when the new middle support is installed, the height position of the new middle support is adjusted to ensure that the middle support is aligned with the pin hole of the upper support and the screw hole position. The baffle is a moving part and is kept open when the replacing device is pushed into the mounting position of the middle bracket, so that the baffle is prevented from interfering with the middle bracket; when the middle support is released the installation position along with the replacement device, the baffle connects both ends about the fluting notch, increases this position structural strength, avoids this position to appear controlling the jag to warp.
In the application, the width of the strip-shaped groove of the support plate of the middle support is larger than the thickness of the blade of the middle support, so that the device can be smoothly inserted into the position of the middle support through the open groove;
the width of the strip-shaped groove of the support plate of the middle bracket is smaller than the maximum cross section width of the middle bracket (usually, the middle section of the middle bracket is taken as a model connecting position, the section is in the shape of an equal straight cylinder, and the diameter of the equal straight cylinder is the maximum cross section width of the middle bracket), so that the support plate of the middle bracket can be smoothly supported on the support plate of the middle bracket instead of falling after the middle bracket is respectively separated from the upper bracket and the lower bracket;
the strip-shaped groove length of the middle support supporting plate is greater than that of the middle support, so that the contact surfaces of the middle support and the middle support supporting plate are ensured to be as many as possible, and the stability of the middle support is improved when the middle support is placed on the device.
The length of the slotted groove of the middle support plate is not excessively long, and is kept in a proper proportion to the length of the part which is not slotted, so that the middle support plate has enough strength and can bear the weight of the middle support without bending deformation or even breakage; the center of the middle support is ensured to be basically positioned at the center of the whole device as far as possible, and the tail end of the middle support is just the tail end of the slot at the moment so as to reduce the possibility that the middle support topples along the slot direction. Further, the length of the strip-shaped groove of the support plate of the middle support is 1.05 to 2.0 times of the length of the middle support.
The height of the replacing device is guaranteed to be not greater than the height between the cross section and the lower wall plate when the width of the cross section of the middle support is consistent with the width of the groove of the support plate of the middle support, otherwise, the situation that the device cannot be pushed to the position of the support at the middle part due to interference of the support plate and the support at the middle part can occur. Further, the minimum height of the replacing device is ensured to be not less than 10mm less than the height between the cross section and the lower wall plate when the width of the cross section of the middle support is consistent with the width of the groove of the middle support supporting plate, otherwise, after the middle support is separated from the upper support and the lower support respectively, the middle support may fall onto the middle support supporting plate, and large impact force may be generated on the device.
The maximum stroke of the lifting adjusting device is ensured to be connected with a screw arranged in the threaded hole and positioned on the middle support, otherwise, the purpose of adjusting the height position of the middle support through the lifting adjusting device cannot be realized.
The transverse position of the lifting adjusting device should be close to the blade of the middle support as much as possible so as to reduce the transverse force arm and further reduce the transverse additional moment born by the replacing device when the height position of the middle support is adjusted. Because such exchange devices are stronger in the lifting direction but tend to be weaker in the transverse direction.
In this application, four drive wheels of changing the device all adopt Mecanum wheel, and it can realize moving mode such as the preceding, sideslip, diagonal, rotation and combination, and the meticulous position control in the limited motion space that locates after the device gets into middle part support mounting position is particularly suitable for.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
(1) The device is simple in structure, the main body structure adopts the section bar, the weight of the device is greatly reduced on the premise of meeting the replacement requirement of the model supporting mechanism, the position adjustment flexibility of the device is effectively improved, a large amount of labor and time cost is saved, and the replacement efficiency of the model supporting mechanism is improved;
(2) The method has reasonable design, reduces the replacement steps and workload of the model supporting mechanism, and improves the replacement efficiency of the model supporting mechanism; when the middle support is placed on the device, compared with the original device, the center of gravity of the existing device is closer to the center of gravity of the middle support, so that the risk of overturning the middle support and even the device, which is possibly caused by the position difference of the center of gravity, can be better avoided, and the replacement safety of the model supporting mechanism is improved;
(3) The universality is better; because the device of this application mainly realizes the change of middle part support through placing the middle part support in the form of backup pad, no longer need the screw hole site rather than matching like traditional device, consequently not only be applicable to the change of the model supporting mechanism of full curved sword structural style, also can satisfy the change of the model supporting mechanism of half curved sword form simultaneously, even to some special model supporting mechanism, as long as its middle part support basic structure adds the middle part support middle section that the width is greater than the blade for the blade, and the middle section position is not less than the backup pad height, this device also can be changed or only need slightly reequip and can realize changing.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
fig. 1 is a model supporting device commonly used in a high-speed wind tunnel at present.
Fig. 2 is a schematic structural view of the middle support.
Fig. 3 is a front view of a conventional model supporting mechanism exchanging apparatus.
Fig. 4 is a rear view of fig. 3.
Fig. 5 is a plan view of a conventional model support mechanism exchanging apparatus.
Fig. 6 is a schematic structural diagram of a replacement device of a large-scale high-speed wind tunnel model support mechanism in embodiment 1.
Fig. 7 is a side view of fig. 6.
Fig. 8 is a top view of fig. 6.
The labels in the figure are: 1. universal wheel, 2, base, 3, left bottom plate, 4, guide rail, 5, left connecting plate, 6, right connecting plate, 7, right bottom plate, 11, middle support supporting plate, 12, oblique rib, 13, bottom plate, 14, vertical plate, 15, mecanum wheel, 16, first reinforcing rib, 17, second reinforcing rib, 18, lifting adjusting device, 19, baffle, 51, upper support, 52, middle support, 53, lower support, 54, motion control mechanism, 55, model, 56, support rod, 57, guide rail.
Detailed Description
All of the features disclosed in this specification, or all of the steps in any method or process so disclosed, may be combined in any combination, except combinations of features and/or steps that are mutually exclusive.
Any feature disclosed in this specification may be replaced by alternative features serving equivalent or similar purposes, unless expressly stated otherwise. That is, unless expressly stated otherwise, each feature is only an example of a generic series of equivalent or similar features.
Example 1
The structure of the universal quick-change device of the large-scale high-speed wind tunnel model supporting mechanism of the embodiment is shown in fig. 6-8. The replacing device comprises four middle support supporting plates, four supporting components, a baffle, a lifting adjusting device and a connecting component, wherein the supporting components are used for supporting the middle support supporting plates.
The supporting component comprises universal wheels, a bottom plate, vertical plates and inclined ribs. Wherein, the universal wheel sets up in the bottom plate below, and the riser sets up on the bottom plate perpendicularly, and the both ends of diagonal muscle link to each other with bottom plate, riser respectively. As shown in fig. 7, the tilted ribs, the bottom plate and the vertical plate are arranged in a right triangle. In the structure, the universal wheels are preferably Mecanum wheels; the bottom plate can provide support for the vertical plate. Four mecanum wheel cooperation supporting component can realize the motion modes such as antedisplacement, sideslip, diagonal, rotation and combination, and the meticulous position control in the limited motion space that locates after the change device that especially adapted this application got into middle part support mounted position. In the embodiment, the inclined ribs, the bottom plate and the vertical plate are welded into a whole, and the Mecanum wheels are arranged below the inclined ribs, the bottom plate and the vertical plate, so that the supporting assembly is formed.
The connecting assembly comprises a first reinforcing rib and a second reinforcing rib. The first reinforcing ribs are arranged in parallel, and the two ends of the first reinforcing ribs are connected with the supporting component respectively along the axial direction of the strip-shaped groove in the middle support supporting plate. And the second reinforcing ribs are arranged in parallel along the axial direction perpendicular to the strip-shaped grooves in the middle support supporting plate, and two ends of each second reinforcing rib are respectively connected with the supporting component. In this embodiment, the axial direction of the first reinforcing rib is perpendicular to the axial direction of the second reinforcing rib, and the projection of the first reinforcing rib and the second reinforcing rib along the vertical direction is rectangular. In the structure, two connecting assemblies along the slotting direction are connected together by using the first reinforcing ribs so as to increase the strength of the device in the slotting direction. And connecting the two connecting assemblies in the range of no longer grooving by using the second reinforcing rib so as to enhance the transverse strength of the device.
The middle support supporting plate is U-shaped, a strip-shaped groove matched with the middle support is arranged on the middle support supporting plate, and the middle support can be placed on the middle support supporting plate or taken down from the middle support supporting plate through the strip-shaped groove. Preferably, the middle support supporting plate comprises a middle first supporting piece, a middle first connecting piece and a middle second supporting piece, the middle first supporting piece and the middle second supporting piece are parallel to each other, the middle first supporting piece and the middle first connecting piece are perpendicular to each other, the middle first supporting piece, the middle first connecting piece and the middle second supporting piece are sequentially connected and arranged in a U shape, and a strip-shaped groove is formed among the middle first supporting piece, the middle first connecting piece and the middle second supporting piece. Further, the width of the strip-shaped groove of the middle support plate is larger than the thickness of the blade of the middle support, and the width of the strip-shaped groove of the middle support plate is smaller than the width of the maximum cross section of the middle support; the length of the strip-shaped groove of the middle support supporting plate is greater than that of the middle support.
Furthermore, four vertexes of the support plate of the middle bracket are respectively arranged at the top end of the vertical plate of the support component; by adopting the structure, the four supporting components can provide support for the middle support supporting plate and drive the middle support supporting plate to move.
The baffle is connected with the middle support supporting plate and can rotate relative to the middle support supporting plate so as to open or close the strip-shaped groove in the middle support supporting plate. Meanwhile, the lifting adjusting device is arranged on the middle support supporting plate; the position of the middle support placed on the middle support supporting plate along the vertical direction can be adjusted by the lifting adjusting device. In the structure, the lifting adjusting device is used for controlling the middle bracket to slowly fall on the middle bracket supporting plate after the middle bracket is separated from the upper bracket; and when the new middle support is installed, the height position of the new middle support is adjusted, and the middle support is aligned with the pin hole of the upper support and the screw hole position. The baffle is a moving part and is kept open when the replacing device is pushed into the mounting position of the middle bracket, so that the baffle is prevented from interfering with the middle bracket; when the middle support is released the installation position along with the replacement device, the baffle connects both ends about the fluting notch, increases this position structural strength, avoids this position to appear controlling the jag to warp.
In this embodiment, the strip-shaped groove width of the middle support supporting plate is greater than the thickness of the middle support blade, so that the device can be smoothly inserted into the position of the middle support through the open groove. The width of the strip-shaped groove of the middle support supporting plate is smaller than the maximum cross section width of the middle support (usually, the middle section of the middle support is taken as a model connecting position, the section is in the shape of an equal straight cylinder, and the diameter of the equal straight cylinder is the maximum cross section width of the middle support), so that the middle support can be smoothly supported on the middle support supporting plate instead of falling after being separated from the upper support and the lower support respectively. The strip-shaped groove length of the middle support supporting plate is greater than that of the middle support, so that the contact surfaces of the middle support and the middle support supporting plate are ensured to be as many as possible, and the stability of the middle support is improved when the middle support is placed on the device. Meanwhile, the slotting length of the strip-shaped groove of the middle support supporting plate is not too long, and the slotting length is kept in a proper proportion with the length of the part which is not slotted, so that the middle support supporting plate has enough strength and can bear the weight of the middle support without bending deformation or even breakage; the center of the middle support is ensured to be basically positioned at the center of the whole device as far as possible, and the tail end of the middle support is just the tail end of the slot at the moment so as to reduce the possibility that the middle support topples along the slot direction.
The height of the replacing device is guaranteed to be not greater than the height between the cross section and the lower wall plate when the width of the cross section of the middle support is consistent with the width of the groove of the support plate of the middle support, otherwise, the situation that the device cannot be pushed to the position of the middle support due to interference of the support plate and the middle support can occur. Further, the minimum height of the replacing device is ensured to be not less than 10mm less than the height between the cross section and the lower wall plate when the width of the cross section of the middle support is consistent with the width of the groove of the middle support supporting plate, otherwise, after the middle support is separated from the upper support and the lower support respectively, the middle support may fall onto the middle support supporting plate, and large impact force may be generated on the device.
The maximum stroke of the lifting adjusting device is ensured to be connected with a screw arranged in the threaded hole and positioned on the middle support, otherwise, the purpose of adjusting the height position of the middle support through the lifting adjusting device cannot be realized. The transverse position of the lifting adjusting device should be close to the blade of the middle support as much as possible so as to reduce the transverse force arm and further reduce the transverse additional moment born by the replacing device when the height position of the middle support is adjusted. Because such exchange devices are stronger in the lifting direction but tend to be weaker in the transverse direction.
The procedure for replacing the mold supporting mechanism by this apparatus is as follows.
1. And taking out the positioning pins connected with the upper support and the lower support respectively from the middle support.
2. The position of the replacing device is adjusted to ensure that the strip-shaped groove of the supporting plate of the middle bracket is aligned with the middle bracket as much as possible.
3. The baffle is opened and the replacement device is pushed into the position of the middle bracket.
4. The universal wheel is controlled to adjust the spatial position of the replacing device, so that the middle support is located at the middle position of the replacing device as far as possible after falling down.
5. Taking down the connecting screw of the middle bracket and the lower bracket; in order to prevent the lower support from freely sliding down due to out-of-control after the middle support is separated, a detached screw penetrates through a screw hole of which the thread is positioned on the lower support and the axis position is positioned on the middle support, the screw rod is ensured not to extend into the middle support, otherwise, the middle support cannot be taken out, the part which is not penetrated is supported by a jack, and the position between the lower support and the lower wall plate is prevented from falling down due to separation of the middle support.
6. A screw which is detached penetrates through a middle screw hole which is positioned in the middle support from the screw thread and is positioned in the middle support from the axis position, the screw rod is ensured not to extend into the lower support, and the part which is not penetrated is connected with the lifting adjusting device.
7. And taking down the connecting screw of the middle bracket and the upper bracket.
8. The middle support slowly falls onto the middle support supporting plate of the replacing device by controlling the telescopic amount of the lifting adjusting device.
9. The baffle is utilized to connect the left end and the right end of the strip-shaped groove of the middle support supporting plate, so that the deformation of left and right branches of the middle support supporting plate due to stress can be ensured, and the overturning of the middle support in the pitching direction can be avoided to a certain extent.
10. The universal wheel is controlled to adjust the spatial position of the replacing device, so that the middle support can move transversely properly to be away from the axial line positions of the wind tunnel where the upper support and the lower support are located, and the interference between the middle support and the upper support and the lower support when the replacing device is withdrawn is avoided.
11. And withdrawing the replacing device and the middle support from the position of the model supporting mechanism to the corresponding storage space.
12. The middle bracket is removed from the changing device by means of a travelling crane and the middle bracket to be mounted is placed on the changing device.
13. The spatial position of the replacing device is adjusted by controlling the universal wheel, so that the middle support is aligned to the planned installation position as much as possible, and the workload of adjusting the position in a limited space after the middle support reaches the expected installation position is reduced.
14. The spatial position of the replacing device is adjusted by controlling the universal wheel, and the height position of the middle bracket is adjusted by using the lifting adjusting device, so that the pin hole positions and the screw hole positions of the middle bracket and the upper bracket are aligned.
15. The upper bracket and the middle bracket are connected by pins and screws.
16. The pin hole positions and the screw hole positions of the middle bracket and the lower bracket are aligned by adjusting the telescopic amount of the jack.
17. The middle bracket and the lower bracket are connected by pins and screws.
18. The device is moved entirely out of the region of the central support. And finishing the replacement work of the whole model supporting mechanism.
The invention is not limited to the foregoing embodiments. The invention extends to any novel feature or any novel combination of features disclosed in this specification and any novel method or process steps or any novel combination of features disclosed.
Claims (7)
1. A replacing device of a large-scale high-speed wind tunnel model supporting mechanism is characterized by comprising a middle support supporting plate, a supporting component for supporting the middle support supporting plate, a baffle, a lifting adjusting device and a connecting component;
the supporting assembly comprises universal wheels, a bottom plate, vertical plates and inclined ribs, the universal wheels are arranged below the bottom plate and can drive the bottom plate to move, the vertical plates are arranged on the bottom plate and can support the vertical plates, two ends of each inclined rib are respectively connected with the bottom plate and the vertical plates, and the inclined ribs, the bottom plate and the vertical plates are arranged in a triangular mode;
the middle support supporting plate is U-shaped, a strip-shaped groove matched with the middle support is formed in the middle support supporting plate, and the middle support can be placed on the middle support supporting plate or taken down from the middle support supporting plate through the strip-shaped groove;
the baffle is connected with the middle support supporting plate and can rotate relative to the middle support supporting plate so as to open or close the strip-shaped groove on the middle support supporting plate; the lifting adjusting device is arranged on the middle support supporting plate and can adjust the position of the middle support placed on the middle support supporting plate along the vertical direction;
the number of the supporting components is four; the connecting assembly comprises a first reinforcing rib and a second reinforcing rib; the first reinforcing ribs are in a group, and two ends of each first reinforcing rib are respectively connected with the supporting component along the axial direction of the strip-shaped groove on the supporting plate of the middle support; the second reinforcing ribs are in a group along the axial direction vertical to the strip-shaped grooves on the support plate of the middle support, and two ends of each second reinforcing rib are respectively connected with the support assembly; the projection of the first reinforcing rib and the second reinforcing rib along the vertical direction is quadrilateral;
the supporting components are respectively positioned below four vertexes of the middle support supporting plate, and the four supporting components can provide support for the middle support supporting plate and drive the middle support supporting plate to move;
the width of the strip-shaped groove of the middle support supporting plate is greater than the thickness of the middle support blade, and the width of the strip-shaped groove of the middle support supporting plate is less than the width of the maximum cross section of the middle support;
the length of the strip-shaped groove of the middle support supporting plate is greater than that of the middle support.
2. The replacing device according to claim 1, wherein the vertical plate is vertically arranged on the bottom plate, and the inclined ribs, the bottom plate and the vertical plate are arranged in a right triangle.
3. The replacing device according to claim 1 or 2, wherein the first reinforcing ribs are in a group, and the first reinforcing ribs are arranged in parallel with each other; the second reinforcing ribs are in a group and are arranged in parallel.
4. The replacing device according to claim 3, wherein the axial direction of the first reinforcing rib is perpendicular to the axial direction of the second reinforcing rib, and the projection of the first reinforcing rib and the second reinforcing rib along the vertical direction is rectangular.
5. The replacing device according to any one of claims 1 to 4, wherein four vertexes of the middle support supporting plate are respectively arranged at the top end of a vertical plate of the supporting component, and the supporting component can provide support for the middle support supporting plate.
6. The replacing device according to any one of claims 1 to 5, wherein the middle support plate comprises a middle first support member, a middle first connecting member, and a middle second support member, the middle first support member and the middle second support member are parallel to each other, the middle first support member and the middle first connecting member are perpendicular to each other, the middle first support member, the middle first connecting member and the middle second support member are sequentially connected and arranged in a U shape, and a strip groove is formed between the middle first support member, the middle first connecting member and the middle second support member.
7. A replacing method using the replacing device of any one of claims 1 to 6, characterized by comprising the following steps:
(1) Taking out the positioning pins respectively connected with the upper bracket and the lower bracket from the middle bracket;
(2) Adjusting the position of the replacing device to make the strip-shaped groove of the middle bracket supporting plate aligned with the middle bracket as much as possible;
(3) Opening the baffle plate, and pushing the replacing device into the position of the middle bracket;
(4) The universal wheel is controlled to adjust the spatial position of the replacing device, so that the middle bracket is positioned in the middle of the replacing device as far as possible after falling down;
(5) Taking down the connecting screw of the middle bracket and the lower bracket; in order to prevent the lower bracket from freely sliding down due to out-of-control after the middle bracket is separated, a detached screw penetrates through a middle screw hole of which the screw thread is positioned on the lower bracket and the axis position is positioned on the lower bracket, the screw rod is ensured not to extend into the middle bracket, otherwise, the middle bracket cannot be taken out, the part which is not penetrated is supported by a jack, and the position between the lower bracket and the lower wall plate is prevented from falling down due to separation of the middle bracket;
(6) A detached screw penetrates through a middle screw hole with threads positioned on the middle support and an axis position positioned on the middle support, the screw rod is ensured not to extend into the lower support, and the part which is not penetrated is connected with the lifting adjusting device;
(7) Taking down the connecting screw of the middle bracket and the upper bracket;
(8) The middle bracket slowly falls onto a middle bracket supporting plate of the replacing device by controlling the telescopic amount of the lifting adjusting device;
(9) The left end and the right end of the strip groove of the middle support plate are connected by the baffle plate, so that the left-right branching deformation of the middle support plate caused by stress can be ensured, and the overturning of the middle support in the pitching direction can be avoided to a certain extent;
(10) The universal wheel is controlled to adjust the spatial position of the replacing device, so that the middle bracket is enabled to move transversely properly and is separated from the wind tunnel axis positions of the upper bracket and the lower bracket, and the interference between the middle bracket and the upper bracket and the lower bracket when the replacing device is withdrawn is avoided;
(11) Withdrawing the replacing device and the middle support from the position of the model supporting mechanism to a wide space;
(12) Removing the middle bracket from the replacing device by using a travelling crane, and placing the middle bracket to be installed on the replacing device;
(13) The spatial position of the replacing device is adjusted by controlling the universal wheel, so that the middle bracket is aligned to the planned installation position as much as possible, and the workload of adjusting the position in a limited space after the middle bracket reaches the predicted installation position is reduced;
(14) The spatial position of the replacing device is adjusted by controlling the universal wheel, and the height position of the middle bracket is adjusted by using the lifting adjusting device, so that the pin hole positions and the screw hole positions of the middle bracket and the upper bracket are aligned;
(15) Connecting the upper bracket and the middle bracket by using pins and screws;
(16) The pin hole positions and the screw hole positions of the middle bracket and the lower bracket are aligned by adjusting the telescopic amount of the jack;
(17) The middle bracket and the lower bracket are connected by pins and screws;
(18) Moving the device integrally out of the area where the middle support is located;
and finishing the replacement work of the whole model supporting mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211498378.XA CN115839816A (en) | 2022-11-28 | 2022-11-28 | Replacement device and replacement method for large high-speed wind tunnel model supporting mechanism |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211498378.XA CN115839816A (en) | 2022-11-28 | 2022-11-28 | Replacement device and replacement method for large high-speed wind tunnel model supporting mechanism |
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| CN115839816A true CN115839816A (en) | 2023-03-24 |
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| CN202211498378.XA Pending CN115839816A (en) | 2022-11-28 | 2022-11-28 | Replacement device and replacement method for large high-speed wind tunnel model supporting mechanism |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116692385A (en) * | 2023-08-04 | 2023-09-05 | 中国航空工业集团公司沈阳空气动力研究所 | Model transport vehicle for wind tunnel and control method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116692385A (en) * | 2023-08-04 | 2023-09-05 | 中国航空工业集团公司沈阳空气动力研究所 | Model transport vehicle for wind tunnel and control method |
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