CN114034462A - Follow-up sealing structure for wind tunnel abdominal bracing test and control method - Google Patents
Follow-up sealing structure for wind tunnel abdominal bracing test and control method Download PDFInfo
- Publication number
- CN114034462A CN114034462A CN202210013689.6A CN202210013689A CN114034462A CN 114034462 A CN114034462 A CN 114034462A CN 202210013689 A CN202210013689 A CN 202210013689A CN 114034462 A CN114034462 A CN 114034462A
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- wind tunnel
- cover plate
- follow
- steel belt
- abdominal
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- 238000007789 sealing Methods 0.000 title claims abstract description 33
- 230000003187 abdominal effect Effects 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 20
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 48
- 239000010959 steel Substances 0.000 claims abstract description 48
- 230000033001 locomotion Effects 0.000 claims abstract description 29
- 238000004804 winding Methods 0.000 claims abstract description 7
- 230000007246 mechanism Effects 0.000 claims description 21
- 210000001015 abdomen Anatomy 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 8
- 238000009434 installation Methods 0.000 abstract description 5
- 210000000056 organ Anatomy 0.000 description 4
- 239000004744 fabric Substances 0.000 description 3
- 230000009467 reduction Effects 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
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Classifications
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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
Abstract
The invention discloses a follow-up sealing structure and a control method for a wind tunnel abdominal bracing test, which comprises a cover plate arranged on the inner side of the wind tunnel wall, a pressing plate arranged on the back surface of the cover plate, and a steel belt arranged between the pressing plate and the cover plate, wherein two ends of the steel belt are respectively connected with a winding drum device, the winding drum devices are fixedly connected to the cover plate, the cover plate is provided with a through chute along the direction of the steel belt, the steel belt corresponding to the chute is provided with a through hole, and the through hole is sleeved on a abdominal bracing strut; the structure of the invention can solve the installation problem of follow-up sealing in small space in the wind tunnel test at present, the required space is greatly reduced along the motion direction of the supporting rod and in the motion direction of the vertical supporting rod, and the invention is suitable for the position with narrow space.
Description
Technical Field
The invention relates to the technical field of aerodynamic wind tunnel tests in the aviation industry, in particular to a follow-up sealing structure for a wind tunnel abdominal bracing test.
Background
The belly brace device is commonly used in a closed wind tunnel test, and the driving mode of the belly brace device enables the wind tunnels in the motion area of the belly brace device to be communicated with each other. In the wind tunnel test, the flow field in the wind tunnel needs to be ensured to be stable, and the interference of the outside of the wind tunnel is reduced, so that the wall surface of the wind tunnel needs to be sealed, namely the web bracing device needs to be sealed in a follow-up manner.
At present, the sealing modes of the abdominal support in the wind tunnel test mainly include the following two modes: (1) the curtain fabric sealing strip is adopted for follow-up sealing, the sealing strip is a sealing strip with two ends rolling and closed loop, or the sealing strip with two ends provided with the length capable of covering the area is arranged, and the sealing strip can move back and forth along with the supporting rod when the abdominal supporting rod moves. However, this sealing method requires a large installation space, and the sealing bands are left at the two ends long enough to seal when the strut reaches the limit position, which is not applicable to devices with limited installation space. Moreover, the main material of the sealing bag adopted at present is curtain fabric, and the deformation of the curtain fabric in the motion process can cause the reduction of the sealing performance. (2) The organ protection cover is sealed, the organ protection cover is connected to two sides of the abdominal bracing device, when the abdominal bracing device moves, the organ protection cover on one side correspondingly unfolds, and the organ protection cover on the other side folds to move along with the abdominal bracing device. However, the surface of the sealing mode is not smooth enough, and wrinkles and bulges have certain influence on the flow field of the wind tunnel.
Disclosure of Invention
The invention designs a novel sealing structure, which mainly aims to solve the problem that follow-up sealing cannot be carried out in part of specific wind tunnels due to narrow installation space at present through structural improvement, and further aims to solve the problem of sealing performance in the follow-up process.
In order to achieve the purpose, the invention adopts the following technical scheme:
the utility model provides a follow-up seal structure for wind-tunnel abdominal bracing is experimental, is including setting up at the inboard apron of wind-tunnel wall, sets up the clamp plate at the apron back, sets up the steel band between clamp plate and apron, the steel band both ends are connected with on the reel device respectively, reel device fixed connection is to the apron, be provided with the spout that link up along the steel band direction on the apron, be provided with the through-hole on the steel band that corresponds with the spout, the through-hole cover is on abdominal bracing branch.
In the technical scheme, the device comprises a plurality of pressing plates, and one end of each pressing plate is fixedly connected with the cover plate.
In the technical scheme, the pressing plates are symmetrically distributed on two sides of the sliding groove.
In the technical scheme, the steel belt slides along the sliding groove direction between the pressing plate and the cover plate.
In the technical scheme, the surface of the steel belt, which is attached to the cover plate, is of a planar structure, and the steel belt is attached to the cover plate in a sealing manner.
In the technical scheme, the winding drum device comprises a rotating shaft, a support and a driving mechanism, the driving mechanism and the support are fixed on the outer side of the wall of the wind tunnel, the rotating shaft is connected to the support, one end of the steel belt is connected with the rotating shaft, and the driving mechanism drives the rotating shaft to rotate.
In the technical scheme, the cover plate is provided with the guide shaft, and the steel belt is connected to the rotating shaft through the guide shaft.
A control method of a follow-up sealing structure for a wind tunnel abdominal bracing test comprises the following steps:
the method comprises the following steps: when the abdomen supporting strut is ready to move along the sliding chute direction, the control system simultaneously sends control signals to the abdomen supporting device and the two driving mechanisms;
step two: according to the movement direction of the abdominal bracing strut, a driving mechanism in the same movement direction is controlled to wind the steel belt, and a driving mechanism in the opposite movement direction releases the steel belt.
In the technical scheme, in the movement process, the movement speed of the abdomen supporting device for controlling the abdomen supporting rod is consistent with the movement speed of the steel belt, and the rotating speeds of the two driving mechanisms for controlling the rotating shafts are consistent and opposite in direction.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the structure of the invention can solve the installation problem of follow-up sealing in small space in the wind tunnel test at present, the required space is greatly reduced along the motion direction of the supporting rod and in the motion direction of the vertical supporting rod, and the invention is suitable for the position with narrow space;
secondly, the invention adopts a steel belt structure combined with a driving mechanism to change the motion mode of the follow-up sealing structure from traditional passive motion to active motion, thereby solving the problem of influence on the flow of the gas field caused by the surface deformation of the sealing structure caused by the traditional passive motion.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a view of the seal of the present invention;
FIG. 2 is a rear view of a wind tunnel cover plate;
wherein: 1 is a cover plate; 2 is a abdominal bracing strut; 3 is a steel strip; 4 is a driving mechanism; 5 is a support; 6 is a rotating shaft; 7 is a through hole; 8 is a platen; and 9 is a guide shaft.
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 (including any accompanying claims, abstract and drawings), 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.
As shown in fig. 1 and fig. 2, the structural configuration of the present embodiment specifically includes:
in the closed wind tunnel section, a cover plate 1 is installed on the inner side of the tunnel wall at the bottom of the wind tunnel, a through chute is arranged on the cover plate 1 along the length direction of the cover plate 1, and the chute is used for enabling a ventral strut supporting rod 2 to move along the chute. The back of apron 1 is provided with a plurality of clamp plate 8, and one side and apron 1 fixed connection of clamp plate 8 are provided with steel band 3 between clamp plate 8 and the apron 1, make steel band 3 closely laminate with apron 1 through the support of clamp plate 8.
The steel belt winding device is characterized in that a driving mechanism 4 and a support 5 are respectively and fixedly mounted on the outer sides of the wind tunnel walls at the two ends of the cover plate, a rotating shaft 6 is arranged on the support 5, a guide shaft 9 is arranged on the back face of the cover plate 1, the steel belt 3 is connected to a steel belt roller of the rotating shaft 6 after passing through the guide shaft 9, the driving mechanism 4 comprises a pneumatic motor and a speed reducer, and the steel belt is output to the rotating shaft 6 through action to drive the steel belt roller to wind the steel belt.
In the actual test process, the abdomen supporting rod 2 is sleeved in the through hole 7 of the steel belt 3, the abdomen supporting rod 2 and the steel belt 3 synchronously move, and the moving process is as follows:
by control system synchro control abdomen and prop device, two actuating mechanism synchro motions, at first when the abdomen props the branch and need to move towards a certain direction, control system simultaneous control drives pneumatic motor and reduction gear drive pivot 6 with the unanimous actuating mechanism drive of direction of motion and rotates to the realization rolls up steel band 3, and another actuating mechanism control releases steel band 3 simultaneously, makes the speed of release and rolling unanimous, keeps unanimous with the rate of motion of abdomen props branch simultaneously.
In the movement process, the movement logic of the abdominal bracing strut and the steel belt is that the abdominal bracing strut actively moves, and the steel belt passively follows the abdominal bracing strut to move due to the movement of the abdominal bracing strut, so that the abdominal bracing strut and the through hole on the steel belt are in a relatively static state. Therefore, the movement of the abdominal bracing strut can not cause any fold on the surface of the steel belt or the condition that the steel belt is driven by the abdominal bracing strut to move, and the steel belt and the abdominal bracing strut move independently and synchronously.
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 (9)
1. The utility model provides a follow-up seal structure for wind-tunnel abdominal bracing is experimental which characterized in that: the wind tunnel structure comprises a cover plate arranged on the inner side of the wall of a wind tunnel, a pressing plate arranged on the back face of the cover plate, and a steel belt arranged between the pressing plate and the cover plate, wherein two ends of the steel belt are respectively connected with a winding drum device, the winding drum device is fixedly connected onto the cover plate, a through chute is arranged on the cover plate along the direction of the steel belt, a through hole is arranged on the steel belt corresponding to the through chute, and the through hole is sleeved on a ventral strut.
2. The follow-up sealing structure for the wind tunnel abdominal bracing test according to claim 1, characterized by comprising a plurality of pressing plates, wherein one end of each pressing plate is fixedly connected with the cover plate.
3. The follow-up sealing structure for the wind tunnel abdominal bracing test according to claim 2, wherein a plurality of pressing plates are symmetrically distributed on two sides of the sliding groove.
4. The follow-up seal structure for the wind tunnel web bracing test according to any one of claims 1 to 3, wherein the steel strip slides along the sliding groove direction between the pressing plate and the cover plate.
5. The follow-up sealing structure for the wind tunnel abdominal bracing test according to claim 4, wherein the surface of the steel strip attached to the cover plate is of a planar structure, and the steel strip is attached to the cover plate in a sealing manner.
6. The follow-up sealing structure for the wind tunnel abdominal bracing test according to claim 1, wherein the winding drum device comprises a rotating shaft, a support and a driving mechanism, the driving mechanism and the support are fixed on the outer side of the wind tunnel wall, the rotating shaft is connected to the support, one end of the steel belt is connected with the rotating shaft, and the driving mechanism drives the rotating shaft to rotate.
7. The follow-up sealing structure for the wind tunnel abdominal bracing test according to claim 6, wherein the cover plate is provided with a guide shaft, and the steel belt is connected to the rotating shaft through the guide shaft.
8. A control method of a follow-up sealing structure for a wind tunnel abdominal bracing test is characterized by comprising the following steps:
the method comprises the following steps: when the abdomen supporting strut is ready to move along the sliding chute direction, the control system simultaneously sends control signals to the abdomen supporting device and the two driving mechanisms;
step two: according to the movement direction of the abdominal bracing strut, a driving mechanism in the same movement direction is controlled to wind the steel belt, and a driving mechanism in the opposite movement direction releases the steel belt.
9. The control method of the follow-up sealing structure for the wind tunnel abdominal bracing test according to claim 8, characterized in that: in the movement process, the movement speed of the abdomen supporting device for controlling the abdomen supporting strut is consistent with the movement speed of the steel belt, and the rotating speeds of the two driving mechanisms for controlling the rotating shafts are consistent and opposite in direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210013689.6A CN114034462B (en) | 2022-01-07 | 2022-01-07 | Follow-up sealing structure for wind tunnel abdominal bracing test and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210013689.6A CN114034462B (en) | 2022-01-07 | 2022-01-07 | Follow-up sealing structure for wind tunnel abdominal bracing test and control method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114034462A true CN114034462A (en) | 2022-02-11 |
| CN114034462B CN114034462B (en) | 2022-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210013689.6A Expired - Fee Related CN114034462B (en) | 2022-01-07 | 2022-01-07 | Follow-up sealing structure for wind tunnel abdominal bracing test and control method |
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| CN (1) | CN114034462B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114486167A (en) * | 2022-04-18 | 2022-05-13 | 中国空气动力研究与发展中心低速空气动力研究所 | Follow-up sealing system and method for notch of floor in low-speed wind tunnel model tail support ground effect test |
| CN115436007A (en) * | 2022-11-08 | 2022-12-06 | 中国航空工业集团公司哈尔滨空气动力研究所 | Single-strut active blow-by prevention mechanism with variable cross section and blow-by prevention method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114486167A (en) * | 2022-04-18 | 2022-05-13 | 中国空气动力研究与发展中心低速空气动力研究所 | Follow-up sealing system and method for notch of floor in low-speed wind tunnel model tail support ground effect test |
| CN115436007A (en) * | 2022-11-08 | 2022-12-06 | 中国航空工业集团公司哈尔滨空气动力研究所 | Single-strut active blow-by prevention mechanism with variable cross section and blow-by prevention method |
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| CN114034462B (en) | 2022-04-08 |
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Granted publication date: 20220408 |