JPH06201514A - Sealing device of gap flow of wind tunnel - Google Patents

Abstract

PURPOSE:To obtain a sealing device being excellent in durability, a test precision and quietness by providing slidably a cover plate which covers a gap between a longitudinally long opening part and a support mechanism and between the opening part and a sting. CONSTITUTION:An opening part cover plate 1 is movable in the longitudinal direction 1a along a pair of right and left guide rails attached to longitudinally long opening parts 07 extending in the respective longitudinal directions of the top plate and the bottom plate of a wind tunnel. The rear end of a piston rod 3 of a hydraulic cylinder 2 is joined to the front end of the cover plate 1. While observing visually the relative positions of a support mechanism 02 and a sting 03 accompanying a change in an attitude angle alpha of a model 04, on the occasion of a model test, an operator 5 makes the cover plate 1 follow the support mechanism 02 and the sting 03 by operating a switch 7 so that the opening of the opening part 07 be minimum. Since the cover plate 1 is provided slidably along the opening part 07 and thereby a gap between the opening part 07 and the support mechanism 02 and between this part and the sting 03 is covered therewith, a sealing mechanism of the opening part of the wind tunnel is hardly worn away even when it is used for a long period, and durability, a test precision and quietness are improved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a clearance flow seal device for a wind tunnel.

[0002]

2. Description of the Related Art Conventional wind tunnel test devices include, for example,
As shown in the vertical sectional view of FIG. 5, the model 04 is horizontally fixed to the central portion of the partial annular support mechanism 02 that vertically penetrates the wind tunnel 01 through the staking 03, as shown in the vertical sectional view of FIG. Then, by rotating the support mechanism 02 around its horizontal horizontal axis, the model 04 is caused to have an attitude angle α with respect to the air flow 05.
Are known to be able to give. In this type of device, in order to avoid interference between the staking 03 and the wind tunnel wall 06 when a large posture angle α is given to the model 04, openings 07 are formed in the upper and lower wind tunnel walls 06, respectively, at the portions where the support mechanism 02 penetrates. It is provided. However, in such a device, when the posture angle α of the model 04 is small, the wind tunnel 0
Since the pressure inside 1 is low, as shown in FIG.
When the clearance flow 08 flows from the outside of 1 through the opening 07 and the attitude angle α of the model 04 is large, the pressure inside the wind tunnel 01 is high because it is partially blocked by the staging 03 and the like. As shown, the clearance flow 09 flows out from the inside of the wind tunnel 01 through the opening 07, so that the velocity distribution of the air flow 05 in the wind tunnel 01 is not uniform, or the air flow 05 locally tilts. There are drawbacks such as a decrease in test accuracy and noise leakage.

Therefore, as shown in the longitudinal sectional view of FIG. 7 and the plan view of FIG. 8, a seal plate 0 made of rubber, sponge or the like is formed in the opening 07.
Although a means for sealing with 10 is also used, with this means, when the use time becomes long, the sealing plate 010 is worn due to rubbing by the staging 03 and shredded by wind pressure, and the sealing property gradually deteriorates, and therefore the accuracy of the wind tunnel test and It has the drawback of reduced quietness.

[0004]

SUMMARY OF THE INVENTION The present invention has been proposed in view of the above-mentioned circumstances, and the seal mechanism of the support mechanism penetrating portion of the wind tunnel wall is not easily worn even if it is used for a long period of time. An object of the present invention is to provide a clearance flow seal device for a wind tunnel, which is excellent in test accuracy and quietness. It is another object of the present invention to provide a clearance flow seal device for a wind tunnel, in which the adjustment of the seal mechanism is easy and therefore the labor saving is excellent.

[0005]

Therefore, according to the invention of claim 1, the upper part and the lower part respectively penetrate through the vertically long openings of the wind tunnel top plate and the wind tunnel bottom plate and are rotatable about horizontal and horizontal axes. In a wind tunnel having a support mechanism and a model mounting staking fixed to the center of the support mechanism in an inward normal direction, the vertically elongated opening and the support mechanism are slidably attached along the vertically elongated opening. , It is characterized in that it is equipped with a cover plate that closes the gap between the staking.

According to a second aspect of the present invention, there are provided a roller attached to the rear end of the cover plate and abutting on the supporting mechanism and the sting, respectively, and a spring for elastically abutting the cover plate on the supporting mechanism and the staging. It is characterized by having.

Further, according to the invention of claim 3, the sensor for detecting the relative position of the cover plate to the supporting mechanism and the staging, respectively, and the cover plate is moved based on the output of the sensor so that the rear end thereof is always the above-mentioned. It is characterized in that it is provided with a support mechanism and a control means for the cover plate that comes into contact with the staking.

[0008]

According to this structure, the following actions are performed. According to the invention of claim 1, since the cover plate is provided so as to be slidable along the vertically long opening and closes the clearance between the vertically long opening and the support mechanism and the staging, it is possible to use it for a long time. Also, the seal mechanism at the opening of the wind tunnel is less likely to wear. According to the second aspect of the present invention, there are provided a roller attached to the rear end of the cover plate and abutting on the supporting mechanism and the sting respectively, and a spring for elastically abutting the cover plate on the supporting mechanism and the staging. Therefore, the cover plate automatically follows the supporting mechanism and the staking. According to the invention of claim 3, the sensor for detecting the relative position of the cover plate to the supporting mechanism and the staging, respectively, and the cover plate is moved based on the output of the sensor so that the rear end of the cover plate is always supported by the supporting mechanism. , And a control means for the cover plate which comes into contact with the staking, respectively, the rear end of the cover plate automatically follows the supporting mechanism and the staking.

[0009]

Embodiments of the present invention will now be described with reference to the drawings.
5 to 8 indicate the same members, respectively, and first, the longitudinal sectional view of FIG. 1 and the partially enlarged view of FIG. 2 show the first embodiment, in which 1 is a wind tunnel top plate, An opening cover plate capable of moving in the front-rear direction 1a along a pair of left and right guide rails attached to longitudinal openings 07 extending in the front-rear direction, respectively. The rear end of the piston rod 3 is the front end of the cover plate 1. The hydraulic cylinder 5, which is connected to the hydraulic cylinder 4 and has the front end connected to the hydraulic mechanism 4, is an operator who handles a switch 7 connected to the other end of the wiring 6 whose one end is connected to the hydraulic mechanism 4. In such a device, during the model test, the operator 5 visually checks the relative positions of the support mechanism 02 and the staking 03 according to the change of the posture angle α of the model 04,
The cover 7 is made to follow the support mechanism 02 and the staging 03 by handling the switch 7 so that the opening of the opening 07 is minimized.

Next, a partially enlarged view of FIG. 3 shows a second embodiment, in which 8 is a ball bearing pivotally supported at the rear end of the cover plate 1, and 9 is the rear end at the front end of the cover plate 1. It is a compression type coil spring that is connected and has its front end fixed to a spring receiving portion 10 provided on the outer surface of the wind tunnel wall 06. In such a device, during the model test, the cover plate 1 automatically moves along the guide rails and follows the support mechanism 02, the staking 03, etc. with a change in the posture angle α of the model 04. The opening of the opening 07 can always be minimized. The ball bearing 8 may be a roller bearing.

Further, a partially enlarged view of FIG. 4 shows a third embodiment, in which 11 is a distance sensor projecting from the front end of the opening 07, 12 is the sensor 11 at the rear end, and the computer 13 is at the front end. , 14 is a wire whose front end is connected to the computer 13 and whose rear end is connected to the hydraulic mechanism 4. In such a device,
At the time of the model test, the sensor 11 detects the positional relationship between the support mechanism 02 or the staging 03 and the cover plate 1 along with the change in the posture angle α of the model 04, and the detection data is sent to the computer 13 via the wiring 12. The control signal is input and transmitted to the hydraulic mechanism 4 via the wiring 14, which causes the cover plate 1 to move in the front-back direction 1a via the hydraulic cylinder 2 and the rod 3 to the supporting mechanism 02, the staging 03 and the like. Since it is made to follow, the opening of the opening 07 can always be minimized.

According to the apparatus of these embodiments, the following effects can be obtained. (1) According to the first embodiment, since the cover plate is provided so as to be slidable along the vertically long opening and closes the clearance between the vertically long opening, the support mechanism, and the staking, long-term use is possible. Even if the seal mechanism at the opening of the wind tunnel is not easily worn, durability, test accuracy and quietness are improved. (2) According to the second embodiment, a roller attached to the rear end of the cover plate and abutting on the supporting mechanism and the sting, respectively, and a spring for elastically abutting the cover plate on the supporting mechanism and the staging. Since the cover plate is provided, the cover plate automatically follows the supporting mechanism and the staging, so that the adjustment of the sealing device is easy and labor saving is improved. (3) According to the third embodiment, the sensor for detecting the relative position of the cover plate to the supporting mechanism and the staging, respectively, and the cover plate is moved based on the output of the sensor so that the rear end of the cover plate is always moved to the above-mentioned position. Since the support mechanism and the control means of the cover plate that come into contact with the staking are respectively provided, the rear end of the cover plate automatically follows the support mechanism and the staking, so that the adjustment of the seal mechanism is easy.
Labor saving is improved.

[0013]

In summary, according to the present invention, the upper and lower portions penetrate the vertically long openings of the wind tunnel top plate and the wind tunnel bottom plate, respectively, and are rotatable about a horizontal and horizontal axis. In a wind tunnel having a model-installed staking fixed in the inward normal direction at the center, a clearance is provided slidably along the vertically elongated opening and between the vertically elongated opening and the supporting mechanism and the staking. By providing a cover plate that closes up, the seal mechanism of the support mechanism penetration part of the wind tunnel wall is less likely to be worn even if it is used for a long period of time. Therefore, a clearance flow seal device for a wind tunnel that is excellent in durability, test accuracy and quietness is provided. Therefore, the present invention is extremely useful in industry.

A roller attached to the rear end of the cover plate and abutting on the supporting mechanism and the staging, respectively,
Since the cover plate is provided with the support mechanism and the spring that elastically abuts on the staking, the adjustment of the seal mechanism is easy, and therefore, the clearance flow seal device of the wind tunnel excellent in labor saving is obtained. It is extremely useful in industry.

Further, a sensor for detecting the relative position of the cover plate with respect to the support mechanism and the staging, respectively, and based on the output of the sensor, the cover plate is moved so that the rear end thereof is always provided to the support mechanism and the staging respectively. The present invention is extremely useful industrially because it has a control means for the abutting cover plate, and because the sealing mechanism can be easily adjusted, and thus a wind tunnel clearance flow sealing device excellent in labor saving can be obtained. .

[Brief description of drawings]

FIG. 1 is a vertical cross-sectional view showing a first embodiment of the present invention.

FIG. 2 is a partially enlarged view showing a II portion of FIG.

FIG. 3 is a partially enlarged view showing a second embodiment of the present invention.

FIG. 4 is a partially enlarged view showing a third embodiment of the present invention.

FIG. 5 is a vertical sectional view showing a known wind tunnel.

FIG. 6 is a vertical cross-sectional view showing a state where the staging of FIG. 5 interferes with the opening of the wind tunnel wall.

FIG. 7 is a vertical cross-sectional view showing a known clearance flow seal device for a seal plate type wind tunnel.

8 is a horizontal sectional view taken along line VIII-VIII of FIG.

[Explanation of symbols]

 1 Cover Plate 1a Forward and Backward Movement 2 Hydraulic Cylinder 3 Rod 4 Hydraulic Mechanism 5 Operator 6 Wiring 7 Switch 8 Ball Bearing 9 Coil Spring 10 Spring Receptor 11 Sensor 12 Wiring 13 Computer 14 Wiring 01 Wind Tunnel 02 Supporting Mechanism 03 Staying 04 Model 05 Airflow 06 Wind tunnel wall 07 Opening α Attitude angle

Claims (3)

[Claims] 1. A partial annular support mechanism having upper and lower portions penetrating vertically elongated openings of a wind tunnel top plate and a wind tunnel bottom plate and rotatable about a horizontal and horizontal axis, and an inward normal direction to a central portion of the support mechanism. In a wind tunnel having a model mounting staking fixed to the above, a cover plate is provided slidably along the longitudinal opening to close a gap between the longitudinal opening and the supporting mechanism and the staking. A wind tunnel clearance flow sealing device characterized by the above. 2. A roller provided at the rear end of the cover plate and abutting against the supporting mechanism and the staking, respectively, and a spring for elastically abutting the cover plate against the supporting mechanism and the staking. A clearance flow sealing device for a wind tunnel according to claim 1. 3. A sensor for detecting the relative position of the cover plate to the supporting mechanism and the staging, respectively, and based on the output of the sensor, the cover plate is moved so that the rear end thereof is always provided to the supporting mechanism and the staging, respectively. The clearance flow sealing device for a wind tunnel according to claim 1, further comprising a control means for abutting the cover plate.