CN210953317U - Novel air bridge device with calibration-free function - Google Patents
Novel air bridge device with calibration-free function Download PDFInfo
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- CN210953317U CN210953317U CN201922266988.7U CN201922266988U CN210953317U CN 210953317 U CN210953317 U CN 210953317U CN 201922266988 U CN201922266988 U CN 201922266988U CN 210953317 U CN210953317 U CN 210953317U
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Abstract
The utility model provides a novel air bridge device with exempt from calibration function, belongs to aircraft power analogue test technical field, the utility model discloses a solution test in-process appear the air bridge damage or change with the relative position of balance, must accomplish the full flow calibration again to obtain the problem to the interference force of balance. The balance comprises a first straight pipeline, a second straight pipeline, an L-shaped bent pipe and a third straight pipeline which are sequentially connected end to end, elastic ventilation devices are arranged at the joints between the first straight pipeline and the second straight pipeline, between the second straight pipeline and the L-shaped bent pipe and between the L-shaped bent pipe and the third straight pipeline, the upper end of the first straight pipeline is connected with a balance measuring end, the right end of the third straight pipeline is connected with a balance fixing end, and the axis of the third straight pipeline is perpendicular to the axes of the first straight pipeline and the second straight pipeline. The utility model discloses a novel air bridge device with exempt from calibration function can obtain the interference force to the balance fast under the condition of not carrying out the whole calibration of air bridge and making up the calibration with the balance.
Description
Technical Field
The utility model relates to an air bridge especially relates to a novel air bridge device with exempt from calibration function, belongs to aircraft power analogue test technical field.
Background
The aircraft power system simulation test (power simulation test) is an essential link in the aerospace aircraft development process and mainly comprises a spray pipe performance test, a jet flow wind tunnel test for full-aircraft aerodynamic characteristic interference, a propeller slipstream wind tunnel test, a civil aircraft Turbine Power Simulation (TPS) wind tunnel test and the like. These tests all directly or indirectly require high-pressure air to realize power simulation, such as the high-pressure air directly generating jet flow, the high-pressure air driving a turbine power simulator to generate bypass jet flow, the high-pressure air driving an air motor to drive a propeller to generate slip flow, and the like. Thus, there are common features of such tests or studies: both the high-pressure pipeline supplies gas to the model and the multi-component balance measures the aerodynamic force of the model. The high-pressure air supply pipeline can influence the balance measurement. Therefore, the air receiving end (balance measuring end) and the air supplying end (balance fixing end) of the air supply pipeline must be isolated by adopting a proper technical means so as to improve the precision of the balance measurement.
The air bridge is a flexible connection in a high-pressure air conveying pipeline, can realize the isolation of an air supply end and an air receiving end so as to reduce or eliminate the mechanical influence brought by the pipeline of the air supply end, and is also called as an air transfer device or a decoupling device. The device is a key component in an aircraft dynamic simulation aerodynamic test and research device. ZL200720078356 discloses an air bridge device with a U-shaped layout, which has six degrees of freedom and realizes stronger interference elimination capability. However, the current air bridge device must be subjected to a calibration process with huge task load, complicated flow and long period before being used, and application publication No. CN201810183486 discloses a calibration method of a wind tunnel strain balance belt air bridge considering pressure influence, which indicates that the calibration process is complicated and greatly influences test efficiency.
In addition, the air bridge is damaged or the relative position of the air bridge and the balance is changed in the test process, the calibration of the whole process must be completed again, and the test must be suspended.
Therefore, the calibration-free air bridge device can greatly improve the efficiency and the quality of the power simulation test, and has important significance for improving the aircraft power simulation test technology.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a novel air bridge device with exempt from calibration function to appear the air bridge in the solution test process and damage or change with the relative position of balance, must accomplish the full flow calibration again, thereby obtain the problem to the interference force of balance.
A novel air bridge device with calibration-free function comprises an L-shaped elastic pipeline;
the L-shaped elastic pipeline comprises an elastic ventilation device, a first straight pipeline, a second straight pipeline, an L-shaped bent pipe and a third straight pipeline;
the balance comprises a first straight pipeline, a second straight pipeline, an L-shaped bent pipe and a third straight pipeline which are sequentially connected end to end, elastic ventilation devices are arranged at the joints between the first straight pipeline and the second straight pipeline, between the second straight pipeline and the L-shaped bent pipe and between the L-shaped bent pipe and the third straight pipeline, the upper end of the first straight pipeline is connected with a balance measuring end, the right end of the third straight pipeline is connected with a balance fixing end, and the axis of the third straight pipeline is perpendicular to the axes of the first straight pipeline and the second straight pipeline.
Preferably: the elastic ventilation device comprises a corrugated pipe flange, a corrugated pipe, a cross joint and a strain gauge;
the two ends of the corrugated pipe are respectively provided with a corrugated pipe flange, the two corrugated pipe flanges are respectively connected with the two ends of the cross joint, and the cross joint is provided with a plurality of strain gauges.
Preferably: the cross joint comprises three cross-section rings, a pair of strain beams is arranged between every two adjacent cross-section rings, the axial directions of the two pairs of strain beams are perpendicular to each other, the strain gauges are arranged on the strain beams, and the cross-section rings on the upper end surface and the lower end surface of the cross joint can realize relative rotation freedom degree through the bending deformation of the strain beams.
Preferably: the balance comprises a balance measuring end, a balance strain beam and a balance fixed end, wherein two ends of the balance measuring end are connected with two ends of the balance fixed end through the balance strain beam, one end of an L-shaped elastic pipeline is connected with the balance measuring end, and the other end of the L-shaped elastic pipeline is connected with the balance fixed end.
The utility model discloses compare with current product and have following effect:
the utility model provides a pair of novel air bridge device with exempt from calibration function utilizes the combination of strain measurement technique and cohesion to solve the method, only needs to carry out theoretical calculation and basic calibration to solitary elasticity ventilation structure and detects, can avoid the whole calibration of air bridge and combine the calibration with the balance, has finally realized exempting from to calibrate the air bridge, has reduced the subsidiary calibration work when air bridge technique uses widely, has greatly improved availability factor.
The interference force to the balance can be quickly obtained under the conditions of not carrying out integral calibration of the air bridge and combined calibration with the balance; the test delay period of the air bridge balance needing to be suspended for 2-3 months in the wind tunnel test when the air bridge balance is abnormal in the test process can be reduced to 2 days, the extra calibration workload of 1-2 months is reduced to zero, the wind tunnel test efficiency can be greatly improved, and the indirect cost can be reduced.
Drawings
FIG. 1 is a schematic diagram of a novel air bridge assembly with calibration-free functionality;
FIG. 2 is a schematic diagram of the construction of the elastic vent;
FIG. 3 is a front view of FIG. 2;
FIG. 4 is a schematic three-dimensional coordinate diagram of an elastic vent;
FIG. 5 is a front view of FIG. 4;
FIG. 6 is a schematic diagram of a ten-byte structure;
FIG. 7 is a front view of FIG. 6;
FIG. 8 is a schematic view of the elastic deformation of the elastic vent;
fig. 9 is a schematic diagram of a novel air bridge device with calibration-free function applied to a strain balance.
In the figure, 1-elastic ventilation device, 2-first straight pipeline, 3-second straight pipeline, 4-L-shaped bent pipe, 5-third straight pipeline, 6-corrugated pipe flange, 7-corrugated pipe, 8-cross joint, 9-strain beam, 10-strain gauge, 11-z coordinate axis, 12-x coordinate axis, 13-y coordinate axis, 14-connecting pipe, 15-transverse displacement, 16-interference force, 201-balance measuring end, 202-balance strain beam, 203-balance fixed end, 911-first strain beam, 912-second strain beam, 921-third strain beam and 922-fourth strain beam.
Detailed Description
Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1 to 3, the novel air bridge device with calibration-free function disclosed in this embodiment includes an L-shaped elastic pipeline;
the L-shaped elastic pipeline comprises an elastic ventilation device 1, a first straight pipeline 2, a second straight pipeline 3, an L-shaped bent pipe 4 and a third straight pipeline 5;
first straight pipeline 2, the straight pipeline 3 of second, L type return bend 4 and the straight pipeline 5 of third end to end in order, and between first straight pipeline 2 and the straight pipeline 3 of second, between the straight pipeline 3 of second and the L type return bend 4 and the straight pipeline 5 of L type return bend 4 and third kneck between 5 all is equipped with elastic ventilation device 1, the upper end of first straight pipeline 2 is connected with balance measuring end 201, the right-hand member of the straight pipeline 5 of third is connected with balance stiff end 203, the axis of the straight pipeline 5 of third is perpendicular with the axis of the straight pipeline 2 of first straight pipeline 2 and the straight pipeline 3 of second.
Further: the elastic ventilation device 1 comprises a corrugated pipe flange 6, a corrugated pipe 7, a cross joint 8 and a strain gauge 10;
Further: the cross section 8 comprises three cross section rings, a pair of strain beams 9 is arranged between every two adjacent cross section rings, the axial directions of the two pairs of strain beams 9 are perpendicular to each other, the strain sheet 10 is arranged on the strain beams 9, and the cross section rings of the upper end surface and the lower end surface of the cross section can realize relative rotation freedom degree through the bending deformation of the strain beams 9.
Further: as shown in fig. 9, the measuring device further comprises a balance measuring end 201, a balance strain beam 202 and a balance fixing end 203, wherein both ends of the balance measuring end 201 are connected with both ends of the balance fixing end 203 through the balance strain beam 202, one end of the L-shaped elastic pipeline is connected with the balance measuring end 201, and the other end of the L-shaped elastic pipeline is connected with the balance fixing end 203.
As shown in fig. 4 and 5, a novel air bridge device with calibration-free function can reduce the interference to balance measurement when used in an aircraft dynamic simulation test system with both aerodynamic balance measurement aerodynamic force and high-pressure air supply. The adopted bellows elastic element can have the degrees of freedom of stretching and compressing on a central axial z coordinate axis 11; with rotational freedom about a transverse x coordinate axis 12 and a transverse y coordinate axis 13. The ten bytes have rotational freedom about a transverse x coordinate axis 12 and a transverse y coordinate axis 13 due to the provision of the resilient beams.
As shown in fig. 6, 7 and 8, for the single elastic vent structure 1, when the end of the connecting pipe 14 is subjected to the transverse displacement 15 when the end of the connecting pipe is elastically deformed with the balance, wherein the connecting pipe 14 refers to any one of the first straight pipe 2, the second straight pipe 3 or the third straight pipe 5, a corresponding transverse interference force 16 is generated, and at the same time, the first strain beam 911 and the second strain beam 912 on the elastic vent structure in the direction perpendicular to the coordinate axis 13 of the transverse displacement 15 are subjected to certain bending deformation, so that only a small transverse interference force 16 is generated under the action of the transverse displacement 15. For the spring beam 9 with the strain gage 10 attached, the amount of strain felt by the strain gage 10 is proportional to the disturbance force 16. The proportional relation between the strain and the disturbance force on the elastic ventilation structure 1 needs to be calibrated in advance, and then the strain of the elastic beam 9 can be directly measured through the strain gauge 10 to obtain the transverse disturbance force 16 under the action of the transverse displacement 15.
As shown in fig. 6, 7 and 9, for the whole L-shaped air bridge, the L-shaped layout long-side pipeline end part 2 is connected with the measuring end 201 of the balance, and the L-shaped layout short-side pipeline end part 5 is connected with the fixed end 203 of the balance. After the balance is loaded, the strain beam 202 of the balance undergoes certain S-shaped deformation, such as transverse displacement 301. At this time, the long-side pipeline end part 2 in the L-shaped layout simultaneously generates the transverse displacement 301 along with the balance measuring end 201, the elastic beams 911 and 912 of the first elastic ventilation structure and the second elastic ventilation structure generate certain bending deformation, the straight pipeline 3 generates the rotation displacement, but the elastic beam 9 of the third elastic ventilation structure does not generate obvious deformation. On the premise of calibrating the relation between the strain of each elastic ventilation structure and the corresponding interference force, the interference force of each elastic ventilation structure can be respectively measured; and further combining and calculating the interference force of each elastic ventilation structure to obtain the interference force of the L-shaped layout long-edge pipeline end part 2 or the L-shaped layout short-edge pipeline end part 5 of the air bridge on the balance under the action of the transverse displacement 301.
This embodiment is only illustrative of the patent and does not limit the scope of protection thereof, and those skilled in the art can make modifications to its part without departing from the spirit of the patent.
Claims (4)
1. The utility model provides a novel air bridge device with exempt from calibration function which characterized in that: comprises an L-shaped elastic pipeline;
the L-shaped elastic pipeline comprises an elastic ventilation device (1), a first straight pipeline (2), a second straight pipeline (3), an L-shaped bent pipe (4) and a third straight pipeline (5);
first straight pipeline (2), the straight pipeline of second (3), L type return bend (4) and the straight pipeline of third (5) end to end in order, and between first straight pipeline (2) and the straight pipeline of second (3), between the straight pipeline of second (3) and L type return bend (4) and the straight pipeline of L type return bend (4) and third (5) the kneck between all is equipped with elastic ventilation device (1), the upper end of first straight pipeline (2) is connected with balance measuring end (201), the right-hand member of the straight pipeline of third (5) is connected with balance stiff end (203), the axis of the straight pipeline of third (5) is perpendicular with the axis of first straight pipeline (2) and the straight pipeline of second (3).
2. The novel air bridge device with calibration-free function according to claim 1, characterized in that: the elastic ventilation device (1) comprises a corrugated pipe flange (6), a corrugated pipe (7), a cross joint (8) and a strain gage (10);
bellows flange (6) are all equipped with at the both ends of bellows (7), and two bellows flanges (6) are connected with the both ends of ten bytes (8) respectively, are equipped with a plurality of foil gauges (10) on ten bytes (8).
3. The novel air bridge device with calibration-free function according to claim 2, characterized in that: the cross joint (8) comprises three cross-section circular rings, a pair of strain beams (9) is arranged between every two adjacent cross-section circular rings, the two pairs of strain beams (9) are perpendicular to each other in the axial direction, the strain sheet (10) is arranged on the strain beams (9), and the cross-section circular rings of the upper end face and the lower end face of the cross joint can realize relative rotation freedom degree through bending deformation of the strain beams (9).
4. The novel air bridge device with calibration-free function according to claim 1, characterized in that: still include balance measuring terminal (201), balance strain beam (202) and balance stiff end (203), the both ends of balance measuring terminal (201) all are connected with the both ends of balance stiff end (203) through balance strain beam (202), and the one end of L type elasticity pipeline is connected with balance measuring terminal (201), and the other end of L type elasticity pipeline is connected with balance stiff end (203).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922266988.7U CN210953317U (en) | 2019-12-17 | 2019-12-17 | Novel air bridge device with calibration-free function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922266988.7U CN210953317U (en) | 2019-12-17 | 2019-12-17 | Novel air bridge device with calibration-free function |
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| CN210953317U true CN210953317U (en) | 2020-07-07 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115615654A (en) * | 2022-11-15 | 2023-01-17 | 中国空气动力研究与发展中心低速空气动力研究所 | Test device and method for calibrating flow influence of backflow type air bridge |
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2019
- 2019-12-17 CN CN201922266988.7U patent/CN210953317U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115615654A (en) * | 2022-11-15 | 2023-01-17 | 中国空气动力研究与发展中心低速空气动力研究所 | Test device and method for calibrating flow influence of backflow type air bridge |
| CN115615654B (en) * | 2022-11-15 | 2023-03-10 | 中国空气动力研究与发展中心低速空气动力研究所 | Test device and method for calibrating flow influence of backflow type air bridge |
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