CN115452309A - Wind tunnel parachute model test device - Google Patents
Wind tunnel parachute model test device Download PDFInfo
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- CN115452309A CN115452309A CN202211094690.2A CN202211094690A CN115452309A CN 115452309 A CN115452309 A CN 115452309A CN 202211094690 A CN202211094690 A CN 202211094690A CN 115452309 A CN115452309 A CN 115452309A
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- parachute
- balance
- upright post
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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
- G01M9/06—Measuring arrangements specially adapted for aerodynamic testing
- G01M9/062—Wind tunnel balances; Holding devices combined with measuring arrangements
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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
- G01M9/08—Aerodynamic models
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- General Physics & Mathematics (AREA)
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
The invention discloses a wind tunnel parachute model test device which comprises a supporting seat, a first upright post, a second upright post and a parachute, wherein the first upright post and the second upright post are arranged on the supporting seat, the parachute is arranged between the first upright post and the second upright post, a first balance connected with the first upright post is arranged in the direction perpendicular to the first upright post, a second balance connected with the second upright post is arranged in the axial direction of the second upright post, the end part of the first balance faces the second balance, the top of the parachute is provided with a through hole, the through hole is sleeved on the first balance to slide, and the end part of a parachute rope of the parachute is connected to the second balance. The device adopts a double-stand column double-balance device to measure the resistance and the radial restoring force of the parachute model, has simple structure, adopts a mode of taking the turntable as the driving force and the roller wheel to be matched, and can realize the +/-45 degree of double-stand column o The side slip angle range is moved, so that the time for dismounting the front and rear stand columns when the side slip angle is changed in the test process is saved, and the test efficiency is effectively improved.
Description
Technical Field
The invention relates to the field of wind tunnel tests, in particular to a test device for a wind tunnel parachute model.
Background
The parachute is a speed reducer for the aircraft to perform pneumatic speed reduction in the landing process by utilizing planet atmosphere, the pneumatic performance of the parachute directly influences the success or failure of the aircraft in the speed reduction landing process, and the parachute is widely applied to aircrafts such as recoverable satellites, manned space shuttles, planet detectors and the like. Whether the parachute can be opened normally, the resistance performance of the parachute under the condition that the opening of the parachute is closed up differently, the dynamic stability of the parachute and the dynamic performance of the parachute in the parachute opening process are all the keys of success and failure of the tasks.
The parachute unfolding process is a process of mutual coupling influence between an atmospheric flow field and a parachute structure, and because the parachute fabric material is small in rigidity and high and complex in instantaneous deformation speed, the problem of complex fluid-solid coupling is analyzed through a numerical simulation method and still has shortcomings, the wind tunnel test method becomes an important means for determining the parachute shape. With the development of deep space exploration, the speed reduction of a single main parachute cannot meet the requirements of related tasks, and the parachute group technology becomes a new hotspot for the development of parachute technology. The test device for measuring the wind tunnel parachute model comprises a supporting device, a force measuring balance and a parachute opening device. After the parachute model is opened, the parachute model swings around the central axis under the action of incoming flow, and the dynamic stability of the parachute is an important index for evaluating the performance of the parachute.
The existing supporting device is a single-upright-column supporting rod or 8-piece line supporting, the resistance of the parachute can only be measured in the supporting mode, the radial restoring force related to the dynamic stability of the parachute cannot be measured, and therefore the existing testing device cannot completely meet the requirements of testing tasks.
Disclosure of Invention
The invention aims to design a wind tunnel parachute model test device, which realizes the measurement of restoring force related to the dynamic stability of a parachute, and simultaneously realizes a dynamic parachute opening test of group parachutes and the measurement of parachute resistance through the test device.
In order to realize the measurement of the restoring force related to the dynamic stability of the parachute, the invention adopts the following technical scheme:
a wind tunnel parachute model test device comprises:
a supporting seat, a first upright post and a second upright post which are arranged on the supporting seat, and a parachute arranged between the first upright post and the second upright post,
a first balance connected with the first upright post is arranged in the direction vertical to the first upright post,
a second balance connected with the second upright post is arranged in the axial direction of the second upright post,
the tip of first balance is towards the second balance, the umbrella top of parachute is provided with the through-hole, the through-hole cover slides on first day is flat, and the parachute rope end connection of parachute to second balance.
In order to adjust the distance between the first balance and the second balance and to meet the requirements of different types of parachute measurement, the following further scheme is adopted:
the support rod is connected to the first upright column, one end of the first balance is connected with the support rod, the other end of the first balance is connected with the support sliding pipe, and the through hole of the parachute is sleeved on the support sliding pipe.
In the technical scheme, the first balance is coaxially arranged in the supporting sliding pipe, the first balance is not in contact with the inner wall of the supporting sliding pipe, and the floating end of the first balance is connected with the end part of the supporting sliding pipe.
As a preferable scheme for adjusting the distance between the first day and the second balance, the following steps are further performed:
the supporting seat comprises a base and two strip-shaped bases fixedly arranged on the base, a connecting plate is arranged between the two strip-shaped bases, and the first stand column and the second stand column are respectively arranged on different connecting plates.
In the above scheme, be provided with a plurality of connecting hole on the bar base, first stand and second stand pass through bolt and connecting hole fixed connection, and first stand and second stand can adjust distance between the two.
To realize can be within + -45 o The measurement is carried out within the range of the sideslip angle, and the further optimization scheme is as follows:
the base is arranged at the center of the strip-shaped base, supporting structures are arranged at two ends far away from the center of the strip-shaped base, and rollers are arranged on the lower bottom surface of the connecting plate.
The strip-shaped base is driven by the roller to rotate within a certain angle range by taking the base as the center of a circle.
In order to realize the dynamic parachute opening test of the group parachute and the measurement of the parachute resistance through the device, the following technical scheme is adopted:
a wind tunnel parachute model test device comprises: a supporting seat, a second upright post arranged on the supporting seat, a second balance connected with the second upright post is arranged on the axial direction of the second upright post,
an umbrella cabin is arranged on the second upright post, a umbrella hanging point guiding device and a motor are arranged below the umbrella cabin, a push rod of the motor is arranged on the umbrella hanging point guiding device as a bolt,
a plurality of parachute bags are arranged in the parachute cabin, parachute ropes of the parachute bags are connected with the second balance, and the parachute is connected with the guide and the parachute.
In summary, due to the adoption of the technical scheme, the invention has the beneficial effects that:
the device adopts a double-stand column double-balance device to measure the resistance and the radial restoring force of the parachute model, has simple structure, adopts a mode of taking the turntable as the driving force and the roller wheel to be matched, and can realize the +/-45 degree of double-stand column o The side slip angle is moved within the range, so that the time for dismounting the front and rear upright posts when the side slip angle is changed in the test process is saved, and the test efficiency is effectively improved; meanwhile, the push rod of the stepping motor is controlled to be contracted in a wireless remote control mode to realize the fixation and release of the rope of the guide umbrella, and the simulation of the dynamic umbrella opening process of the group umbrella is realized.
Drawings
The invention will now be described, by way of example, with reference to the accompanying drawings, in which:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the structure of the base;
FIG. 3 is a view illustrating a state of measurement of a radial restoring force;
wherein: the umbrella comprises a base 1, a strip-shaped base 2, a supporting structure 3, a second upright post 4, a connecting plate 5, a first upright post 6, a roller 7, a supporting sliding pipe 8, an umbrella cabin 9, an umbrella hanging point guiding device 10, a stepping motor 11, a second balance 12, a balance windshield 13, an umbrella cover 14 and an umbrella rope 15.
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, which is a schematic structural diagram of this embodiment, the overall structure includes a base 1, and the base 1 is used for being connected with a turntable of a wind tunnel test section. Two bar bases 2 are connected on the base 1 in parallel, the bar bases 2 can adopt conventional square steel, and the bar bases 2 are separated from the ground by 300mm and suspended to be connected with the base 1 through bolts. The two ends of the strip-shaped base 2 far away from the central end of the base 1 are respectively provided with a supporting structure 3, and the strip-shaped base 2 is supported by adjusting the height of the bolt. A connecting plate 5 is connected between the two strip-shaped bases 2, and the connecting plate 5 is used for connecting a first upright post 6 and a second upright post 4. The bottom of the connecting plate 5 is provided with a roller 7, and a gap is reserved between the roller 7 and the ground.
When the sideslip angle is needed to be walked in the test, the supporting structure 3 rises, the roller 7 is contacted with the ground, the base 1 is driven to rotate by rotating the turntable, so that the two strip-shaped bases 2 slide under the action of the roller 7 to realize +/-45 DEG o The side slip angle moves, so that the time for dismounting the front and rear stand columns when the side slip angle is changed in the test process is saved, and the test efficiency is effectively improved.
Be provided with first stand 6 on the connecting plate 5 of bar base 2 one end, be connected with on first stand 6 with 6 vertically balance branch of first stand, at the first balance of tip axial connection of balance branch, be connected with on the unsteady end of first balance and support slide tube 8, first day is flat to be set up in supporting slide tube 8.
A second upright post 4 is arranged on the connecting plate 5 at the other end of the strip-shaped base 2, a second balance 12 is coaxially connected onto the second upright post 4, and a balance windshield 13 is arranged on the second balance 12. Be provided with umbrella cabin 9 and step motor 11 on second stand 4, the below of umbrella cabin 9 is provided with guide umbrella and hangs some device 10, and step motor 11's push rod is connected with guide umbrella and hangs some device 10 as the bolt, can realize the pin pulling process to guide umbrella string some device 10 through the shrink process of step motor 11 push rod, realizes the release to the guide umbrella, and then the pulling crowd's umbrella realizes the dynamic parachute-opening test process of crowd's umbrella.
Example one
As shown in fig. 3, the parachute is connected between the first upright 6 and the second upright 4, wherein the top of the umbrella cover 14 of the parachute is provided with a through hole which is looped on the supporting slide 8 of the first balance, and the end of the parachute rope 15 of the parachute is connected to the second balance 12.
The parachute can sway around the parachute rope and the parachute top central shaft under the action of wind load, the sway amplitude and frequency are the keys for inspecting the stability of the parachute, and the sway amplitude and frequency are determined by the radial restoring force. The measuring process of the radial restoring force related to the dynamic stability of the parachute is as follows: the parachute rope is connected with the balance 12, the through hole ring sleeve is connected with the supporting sliding pipe 8, the parachute is unfolded in the test process to drive the through hole ring sleeve to slide on the supporting sliding pipe, meanwhile, the through hole ring sleeve extrudes the supporting sliding pipe, the force is measured in the first day, and the force is the radial restoring force of the parachute.
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 wind tunnel parachute model test device is characterized by comprising:
a supporting seat, a first upright post and a second upright post which are arranged on the supporting seat, and a parachute arranged between the first upright post and the second upright post,
a first balance connected with the first upright post is arranged in the direction vertical to the first upright post,
a second balance connected with the second upright post is arranged in the axial direction of the second upright post,
the tip of first balance is towards the second balance, the umbrella top of parachute is provided with the through-hole, the through-hole cover slides on first day is flat, and the parachute line end connection of parachute to second balance.
2. The wind tunnel parachute model test device of claim 1, wherein: the support rod is connected to the first upright, one end of the first balance is connected with the support rod, the other end of the first balance is connected with the supporting sliding pipe, and the through hole of the parachute is sleeved on the supporting sliding pipe.
3. The wind tunnel parachute model test device of claim 2, wherein: the first balance is coaxially arranged in the supporting sliding pipe, the first balance is not in contact with the inner wall of the supporting sliding pipe, and the floating end of the first balance is connected with the end part of the supporting sliding pipe.
4. The wind tunnel parachute model test device of claim 1, wherein: the supporting seat comprises a base, two strip-shaped bases fixedly arranged on the base, a connecting plate is arranged between the two strip-shaped bases, and the first stand column and the second stand column are respectively arranged on different connecting plates.
5. The wind tunnel parachute model test device of claim 4, wherein: the strip-shaped base is provided with a plurality of connecting holes, the first stand column and the second stand column are fixedly connected with the connecting holes through bolts, and the distance between the first stand column and the second stand column can be adjusted.
6. The wind tunnel parachute model test device according to claim 4, wherein: the base is arranged at the center of the strip-shaped base, supporting structures are arranged at two ends far away from the center of the strip-shaped base, and rollers are arranged on the lower bottom surface of the connecting plate.
7. A wind tunnel parachute model test device is characterized by comprising: a supporting seat, a second upright post arranged on the supporting seat, a second balance connected with the second upright post is arranged on the axial direction of the second upright post,
an umbrella cabin is arranged on the second upright post, a umbrella hanging point guiding device and a motor are arranged below the umbrella cabin, a push rod of the motor is arranged on the umbrella hanging point guiding device as a bolt,
the parachute cabin is internally provided with a plurality of parachute bags, the parachute ropes of the parachute bags are connected with the second balance, and the parachute is connected with the guide parachute.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211094690.2A CN115452309A (en) | 2022-09-08 | 2022-09-08 | Wind tunnel parachute model test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211094690.2A CN115452309A (en) | 2022-09-08 | 2022-09-08 | Wind tunnel parachute model test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115452309A true CN115452309A (en) | 2022-12-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211094690.2A Pending CN115452309A (en) | 2022-09-08 | 2022-09-08 | Wind tunnel parachute model test device |
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| Country | Link |
|---|---|
| CN (1) | CN115452309A (en) |
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2022
- 2022-09-08 CN CN202211094690.2A patent/CN115452309A/en active Pending
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