CN110793745A - Supersonic wind tunnel flow calibration and measurement pressure hose protection device - Google Patents
Supersonic wind tunnel flow calibration and measurement pressure hose protection device Download PDFInfo
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- CN110793745A CN110793745A CN201911225017.6A CN201911225017A CN110793745A CN 110793745 A CN110793745 A CN 110793745A CN 201911225017 A CN201911225017 A CN 201911225017A CN 110793745 A CN110793745 A CN 110793745A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M9/00—Aerodynamic testing; Arrangements in or on wind tunnels
- G01M9/02—Wind tunnels
- G01M9/04—Details
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- 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
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Abstract
The invention discloses a supersonic wind tunnel flow calibration and measurement pressure hose protection device. The protection device is positioned behind the bent blade bracket at the wind tunnel test section along the wind tunnel airflow direction and comprises an inner layer protection mechanism and an outer layer protection mechanism, and the inner layer protection mechanism is integrally arranged in the outer layer protection mechanism; the outer protection mechanism is composed of a rear protection cover, an installation base, a front protection cover and a cover plate, and a communicated cavity is formed inside the outer protection mechanism and used for accommodating the inner protection mechanism. And after being collected, the pressure measuring hose led out from the cross pressure measuring bent frame penetrates out of the protecting device and enters the wind tunnel parking chamber to be connected with a wind tunnel pressure measuring system. The protection device adopts the metal corrugated pipe to protect the pressure measuring hose, the metal corrugated pipe moves back and forth along with the lead screw and acts with the outer protection mechanism together, the influence and the damage of supersonic airflow on the pressure measuring hose are avoided, the pressure measuring hose of the flow calibration mechanism is effectively protected, the problem of wiring of multiple pressure measuring pipes in an inner channel of the supersonic wind tunnel is solved, and the reliable acquisition of test pressure measurement data of the supersonic wind tunnel is ensured.
Description
Technical Field
The invention belongs to the technical field of wind tunnel tests, and particularly relates to a supersonic wind tunnel flow calibration and measurement pressure hose protection device.
Background
During the supersonic wind tunnel flow field calibration, a moving and measuring mechanism is adopted to measure the pressure distribution of the test section. The moving and measuring mechanism consists of a servo motor, a transverse transmission shaft, a bevel gear pair and a lead screw nut pair, and converts the rotary motion of the motor into the front and back motion of a lead screw. In the test process, the moving and measuring mechanism adopts a zero starting and turning-off operation mode, when the supersonic wind tunnel smoothly establishes a supersonic flow field, the moving and measuring mechanism operates to the foremost position and then returns in a stepped manner, and the pressure distribution of each given position is measured. The screw rod of the moving and measuring mechanism is of a hollow structure, and the pressure measuring pipe penetrates through the screw rod and is connected with a scanning valve installed in the parking chamber, so that the pressure of the probe is measured. The pressure measuring pipe can not bear the pneumatic load when the supersonic wind tunnel blows, and the pressure measuring pipe swings with wind in the blowing process of the supersonic wind tunnel, so that the pressure measuring pipe is damaged.
In order to solve the problem that a pressure measuring pipe of a moving and measuring mechanism is directly exposed in a channel in a wind tunnel after penetrating through a screw rod in the blowing process of the supersonic wind tunnel, a special supersonic wind tunnel flow correcting and pressure measuring hose protection device is necessary to be developed.
Disclosure of Invention
The invention aims to solve the technical problem of providing a supersonic wind tunnel flow calibration and measurement pressure hose protection device.
The invention discloses a supersonic wind tunnel flow calibration pressure measurement hose protection device which is characterized in that the pressure measurement hose protection device is positioned behind a wind tunnel test section bent knife bracket along the wind tunnel airflow direction and comprises an inner layer protection mechanism and an outer layer protection mechanism, wherein the inner layer protection mechanism is integrally arranged in the outer layer protection mechanism; the inner layer protection mechanism consists of a hollow adapter and a metal corrugated pipe, the front end of the hollow adapter is connected with a hollow lead screw of the movement and measurement mechanism, and the rear end of the hollow adapter is connected with the metal corrugated pipe; the outer layer protection mechanism consists of a rear protection cover, a mounting base, a front protection cover and a cover plate, the lower part of the mounting base is fixed on the wind tunnel indoor housing through a connecting screw, and the cover plate, the front protection cover and the rear protection cover are sequentially fixed on the upper part of the mounting base from front to back; the two cover plates are symmetrically arranged on the left side and the right side of the mounting base through connecting countersunk head screws; the front protective cover is U-shaped; the rear protective cover is also U-shaped, the hollow screw rod, the hollow adapter and the metal corrugated pipe are coated in the rear protective cover, and the length of the rear protective cover is greater than the forward and backward movement distance of the hollow screw rod, the hollow adapter and the metal corrugated pipe; the front protective cover and the rear protective cover are fixed on the mounting base through respective connecting bolt groups; after rear protective cover, preceding safety cover, apron and installation base fixed mounting, inside has the cavity of UNICOM for hold cavity lead screw, cavity adapter, corrugated metal pipe and pressure measurement hose, after the pressure measurement hose that draws forth from cross pressure measurement framed bent, wear out through cavity lead screw, cavity adapter and corrugated metal pipe, get into wind-tunnel and stay the room and be connected with wind-tunnel pressure measurement system.
The metal corrugated pipe body is a metal woven corrugated pipe, and two ends of the metal corrugated pipe are provided with movable connecting nuts.
A guide bolt group is fixed on the rear protective cover and comprises a front guide bolt group and a rear guide bolt group, the front guide bolt group consists of series bolts which are close to the wind tunnel curved knife and are arranged upwards from front to rear arcs, and the rear guide bolt group consists of series bolts which are close to the tail end of the rear protective cover and are arranged upwards from front to rear arcs; the tail bolts of the front guide bolt group are higher than the head bolts of the rear guide bolt group and lower than the tail bolts of the rear guide bolt group.
The rear protective cover is provided with air pressure balancing holes which are symmetrical at the left side and the right side.
The projection of the outer layer protection mechanism in the incoming flow direction of the airflow is positioned in the projection of the curved knife bracket of the wind tunnel test section in the incoming flow direction of the airflow, and the projection area is smaller than that of the curved knife bracket of the wind tunnel test section in the incoming flow direction of the airflow.
The metal corrugated pipe in the supersonic wind tunnel flow calibration and pressure measurement hose protection device has flexibility and certain strength, the flexibility can meet the requirement of moving together with the hollow screw, and the strength can resist the impact of supersonic airflow on the pressure measurement hose in the metal corrugated pipe.
The pressure measuring hose in the supersonic wind tunnel flow calibration and measurement pressure hose protection device is wired from the hollow screw rod, the metal corrugated pipe and the cavity, and is not directly contacted with the supersonic airflow of the flow channel in the wind tunnel.
The guide bolt group in the supersonic wind tunnel flow calibration pressure measurement hose protection device ensures that the movement track of the metal corrugated pipe wrapping the pressure measurement hose in the cavity is controlled.
The air pressure balancing holes symmetrically arranged on the left side and the right side of the rear protective cover in the supersonic wind tunnel flow calibration and pressure measurement hose protecting device ensure that the air pressure in the cavity is the same as the pressure of a flow channel in the wind tunnel.
The projection of the outer layer protection mechanism in the supersonic wind tunnel flow calibration and measurement pressure hose protection device in the incoming flow direction of the airflow is positioned in the projection of the curved knife bracket in the wind tunnel test section, and the projection area is smaller than that of the curved knife bracket in the wind tunnel test section, namely the blockage degree of the flow calibration device is not increased by the supersonic wind tunnel flow calibration and measurement pressure hose protection device. Meanwhile, the adjustable wall plate of the supersonic wind tunnel super-expanding section can still be rotationally adjusted through the rotating hinge according to the requirements of the working conditions of the wind tunnel, namely, the supersonic wind tunnel flow calibration and measurement hose protection device cannot generate structural interference on the movement of the adjustable wall plate of the wind tunnel super-expanding section, and can meet the pressure measurement requirements of all Mach numbers of the supersonic wind tunnel flow calibration.
The protection device for the supersonic wind tunnel flow calibration pressure measurement hose adopts the metal corrugated pipe to protect the pressure measurement hose, the metal corrugated pipe moves back and forth along with the lead screw and acts with the outer protection mechanism together, the influence and the damage of supersonic airflow on the pressure measurement hose are avoided, the pressure measurement hose of the flow calibration mechanism is effectively protected, the problem of wiring of multiple pressure measurement pipes in a flow channel in a supersonic wind tunnel is solved, and the reliable acquisition of test pressure measurement data of the supersonic wind tunnel is ensured.
The supersonic wind tunnel flow calibration pressure measurement hose protection device is simple in structure, reliable in function and convenient to install, and can meet the pressure measurement requirements of all Mach numbers of supersonic wind tunnel flow calibration.
Drawings
FIG. 1 is a schematic structural diagram of a supersonic wind tunnel flow calibration pressure hose protection device according to the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is an enlarged view of section I of FIG. 2;
FIG. 4 is a cross-sectional view B-B of FIG. 1 (with the front and rear boots removed);
FIG. 5 is a cross-sectional view C-C of FIG. 1 (with the displacement mechanism, pressure hose removed);
FIG. 6 is a cross-sectional view D-D of FIG. 4;
fig. 7 is an enlarged cross-sectional view taken along line E-E of fig. 4.
In the figure, 1, a cross pressure measuring bent frame 2, a wind tunnel test section bent knife bracket 3, a moving measuring mechanism 4, a rear protective cover 5, a guide bolt group 6, a hollow adapter 7, a metal corrugated pipe 8, a connecting bolt group 9, a mounting base 10, a connecting screw 11, a front protective cover 12, a connecting countersunk screw 13, a cover plate 14, a pressure measuring hose 15, a rotating hinge 16, an adjustable wall plate 17, a wind tunnel indoor housing 18 and an air pressure balance hole are arranged;
301. the servo motor 302, the transverse transmission shaft 303, the driving bevel gear 304, the driven bevel gear 305, the hollow screw 306, the guide key 307 and the middle bracket.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and examples.
Example 1
As shown in fig. 1 and 4, in this embodiment, the supersonic wind tunnel flow calibration and measurement pressure hose protection device of the present invention is applied to a supersonic wind tunnel flow calibration device, the flow calibration device is formed by connecting a cross pressure measurement bent frame 1 and a moving and measuring mechanism 3, the cross pressure measurement bent frame 1 is fixed on a wind tunnel test section bent knife bracket 2 through a middle bracket 307 on the moving and measuring mechanism 3; the moving and measuring mechanism 3 drives a transverse transmission shaft 302 to rotate through a servo motor 301, the transverse transmission shaft 302 is connected with a driving bevel gear 303, the driving bevel gear 303 drives a driven bevel gear 304 to rotate, the driven bevel gear 304 is of an outer bevel gear and inner hollow thread structure, the inner hollow thread of the driven bevel gear 304 and a hollow lead screw 305 form a lead screw nut pair, and the hollow lead screw 305 is driven to do front-back linear motion through a guide key 306 fixed on a middle support 307.
As shown in fig. 1, 2, 3, 5, 6 and 7, along the wind tunnel airflow direction, the supersonic wind tunnel flow calibration pressure hose protection device of the invention is positioned behind a wind tunnel test section bent knife bracket 2, and comprises an inner layer protection mechanism and an outer layer protection mechanism, wherein the inner layer protection mechanism is integrally arranged in the outer layer protection mechanism; the inner layer protection mechanism consists of a hollow adapter 6 and a metal corrugated pipe 7, the front end of the hollow adapter 6 is connected with a hollow screw 305 of the movement and measurement mechanism 3, and the rear end of the hollow adapter 6 is connected with the metal corrugated pipe 7; the outer layer protection mechanism consists of a rear protection cover 4, a mounting base 9, a front protection cover 11 and a cover plate 13, the lower part of the mounting base 9 is fixed on an indoor housing 17 of the wind tunnel through a connecting screw 10, and the cover plate 13, the front protection cover 11 and the rear protection cover 4 are sequentially fixed on the upper part of the mounting base 9 from front to back; the two cover plates 13 are symmetrically arranged at the left side and the right side of the mounting base 9 through connecting sunk screws 12; the front protective cover 11 is U-shaped; the rear protective cover 4 is also U-shaped, the rear protective cover 4 covers the hollow screw 305, the hollow adapter 6 and the metal corrugated pipe 7, and the length of the rear protective cover 4 is larger than the front-back movement distance of the hollow screw 305, the hollow adapter 6 and the metal corrugated pipe 7; the front protective cover 11 and the rear protective cover 4 are fixed on the mounting base 9 through respective connecting bolt groups 8; after rear protection cover 4, preceding safety cover 11, apron 13 and installation base 9 fixed mounting, the inside cavity that has the UNICOM for hold cavity lead screw 305, cavity adapter 6, corrugated metal pipe 7 and pressure measurement hose 14, after the pressure measurement hose 14 that draws forth from cross pressure measurement framed bent 1 collects, wear out through cavity lead screw 305, cavity adapter 6 and corrugated metal pipe 7, get into wind-tunnel parking room and be connected with wind-tunnel pressure measurement system.
The body of the metal corrugated pipe 7 is a metal woven corrugated pipe, and two ends of the metal corrugated pipe 7 are provided with movable connecting nuts.
A guide bolt group 5 is fixed on the rear protective cover 4, the guide bolt group 5 is divided into a front guide bolt group and a rear guide bolt group, the front guide bolt group consists of series bolts which are close to the wind tunnel curved knife and are arranged upwards from front to rear arcs, and the rear guide bolt group consists of series bolts which are close to the tail end of the rear protective cover 4 and are arranged upwards from front to rear arcs; the tail bolts of the front guide bolt group are higher than the head bolts of the rear guide bolt group and lower than the tail bolts of the rear guide bolt group.
The rear protective cover 4 is provided with air pressure balancing holes 18 which are symmetrical at the left side and the right side.
The projection of the outer layer protection mechanism in the incoming flow direction of the airflow is positioned in the projection of the curved knife bracket 2 in the incoming flow direction of the airflow in the wind tunnel, and the projection area is smaller than that of the curved knife bracket 2 in the incoming flow direction of the airflow in the wind tunnel.
As shown in fig. 1, in the supersonic wind tunnel flow calibration process, because the supersonic wind tunnel flow calibration and pressure measurement hose protection device of the present invention is located in the groove of the adjustable wall plate 16 of the supersonic wind tunnel super-expansion section, and a gap is formed between the adjustable wall plate 16, the adjustable wall plate 16 can still rotate and adjust through the rotating hinge 15 according to the wind tunnel working condition requirement, and no structural interference is generated on the movement of the adjustable wall plate 16.
Claims (5)
1. A supersonic wind tunnel flow calibration pressure measurement hose protection device is characterized in that along the wind tunnel airflow direction, the pressure measurement hose protection device is positioned behind a wind tunnel test section bent knife bracket (2) and comprises an inner layer protection mechanism and an outer layer protection mechanism, and the inner layer protection mechanism is integrally arranged in the outer layer protection mechanism; the inner layer protection mechanism consists of a hollow adapter (6) and a metal corrugated pipe (7), the front end of the hollow adapter (6) is connected with a hollow lead screw (305) of the moving and measuring mechanism (3), and the rear end of the hollow adapter (6) is connected with the metal corrugated pipe (7); the outer layer protection mechanism consists of a rear protection cover (4), a mounting base (9), a front protection cover (11) and a cover plate (13), the lower part of the mounting base (9) is fixed on a wind tunnel indoor housing (17) through a connecting screw (10), and the cover plate (13), the front protection cover (11) and the rear protection cover (4) are sequentially fixed on the upper part of the mounting base (9) from front to back; the two cover plates (13) are symmetrically arranged at the left side and the right side of the mounting base (9) through connecting countersunk screws (12); the front protective cover (11) is U-shaped; the rear protective cover (4) is also U-shaped, the hollow screw rod (305), the hollow adapter (6) and the metal corrugated pipe (7) are wrapped in the rear protective cover (4), and the length of the rear protective cover (4) is larger than the forward and backward movement distance of the hollow screw rod (305), the hollow adapter (6) and the metal corrugated pipe (7); the front protective cover (11) and the rear protective cover (4) are fixed on the mounting base (9) through respective connecting bolt groups (8); after rear protective cover (4), preceding protective cover (11), apron (13) and installation base (9) fixed mounting, inside has the cavity of UNICOM for hold cavity lead screw (305), cavity adapter (6), corrugated metal pipe (7) and pressure measurement hose (14), pressure measurement hose (14) that follow cross pressure measurement framed bent (1) and draw forth after the cluster, wear out through cavity lead screw (305), cavity adapter (6) and corrugated metal pipe (7), get into the wind tunnel and stay the room and be connected with wind tunnel pressure measurement system.
2. The supersonic wind tunnel flow calibration pressure hose protection device according to claim 1, wherein a pipe body of the metal corrugated pipe (7) is a metal woven corrugated pipe, and two ends of the metal corrugated pipe (7) are provided with movable connection nuts.
3. The supersonic wind tunnel flow calibration pressure hose protection device according to claim 1, wherein a guide bolt group (5) is fixed on the rear protection cover (4), the guide bolt group (5) is divided into a front guide bolt group and a rear guide bolt group, the front guide bolt group is composed of a series of bolts which are close to the wind tunnel curved knife and arranged upwards from front to rear arcs, and the rear guide bolt group is composed of a series of bolts which are close to the tail end of the rear protection cover (4) and arranged upwards from front to rear arcs; the tail bolts of the front guide bolt group are higher than the head bolts of the rear guide bolt group and lower than the tail bolts of the rear guide bolt group.
4. The supersonic wind tunnel flow calibration pressure hose protection device according to claim 1, wherein the rear protection cover (4) is provided with air pressure balance holes (18) which are symmetrical on the left side and the right side.
5. The supersonic wind tunnel flow calibration pressure hose protection device according to claim 1, wherein a projection of the outer layer protection mechanism in an airflow incoming flow direction is located in a projection of the wind tunnel test section bent blade bracket (2) in the airflow incoming flow direction, and a projection area is smaller than a projection area of the wind tunnel test section bent blade bracket (2) in the airflow incoming flow direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911225017.6A CN110793745A (en) | 2019-12-04 | 2019-12-04 | Supersonic wind tunnel flow calibration and measurement pressure hose protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911225017.6A CN110793745A (en) | 2019-12-04 | 2019-12-04 | Supersonic wind tunnel flow calibration and measurement pressure hose protection device |
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| Publication Number | Publication Date |
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| CN110793745A true CN110793745A (en) | 2020-02-14 |
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| CN201911225017.6A Pending CN110793745A (en) | 2019-12-04 | 2019-12-04 | Supersonic wind tunnel flow calibration and measurement pressure hose protection device |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111829749A (en) * | 2020-07-27 | 2020-10-27 | 中国空气动力研究与发展中心高速空气动力研究所 | Single-point displacement measuring device for wind tunnel supersonic flow correction large stroke and wiring method |
| CN112054471A (en) * | 2020-09-16 | 2020-12-08 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel continuous variable rolling mechanism cable protection device |
| CN114088335A (en) * | 2022-01-12 | 2022-02-25 | 中国空气动力研究与发展中心空天技术研究所 | Constant flow field rapid measurement method based on forward and reverse continuous movement of pneumatic probe |
| CN114295315A (en) * | 2021-11-15 | 2022-04-08 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Flow field calibration and measurement device applicable to small and medium-sized cross supersonic wind tunnel |
-
2019
- 2019-12-04 CN CN201911225017.6A patent/CN110793745A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111829749A (en) * | 2020-07-27 | 2020-10-27 | 中国空气动力研究与发展中心高速空气动力研究所 | Single-point displacement measuring device for wind tunnel supersonic flow correction large stroke and wiring method |
| CN112054471A (en) * | 2020-09-16 | 2020-12-08 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel continuous variable rolling mechanism cable protection device |
| CN112054471B (en) * | 2020-09-16 | 2021-08-06 | 中国空气动力研究与发展中心高速空气动力研究所 | Wind tunnel continuous variable rolling mechanism cable protection device |
| CN114295315A (en) * | 2021-11-15 | 2022-04-08 | 中国空气动力研究与发展中心设备设计与测试技术研究所 | Flow field calibration and measurement device applicable to small and medium-sized cross supersonic wind tunnel |
| CN114088335A (en) * | 2022-01-12 | 2022-02-25 | 中国空气动力研究与发展中心空天技术研究所 | Constant flow field rapid measurement method based on forward and reverse continuous movement of pneumatic probe |
| CN114088335B (en) * | 2022-01-12 | 2022-04-08 | 中国空气动力研究与发展中心空天技术研究所 | Constant flow field rapid measurement method based on forward and reverse continuous movement of pneumatic probe |
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