JP7244496B2 - Wind tunnel idling and nozzle device, and control method thereof - Google Patents

Description

The present invention relates to the field of wind tunnel technology, and more particularly to a wind tunnel idle and nozzle arrangement and a control method thereof.

A wind tunnel is an important measurement facility for research and development of rail transportation vehicles, and it tests and evaluates the performance of complete vehicles under various artificially created climatic conditions and simulated vehicle operating conditions. be. A wind tunnel typically has an idling mechanism and a nozzle mechanism.

The idling mechanism is for simulating the natural conditions under the idling state of the vehicle. When simulating the idling mode, the idling mechanism blocks the flow path and directs the airflow to the idling wind wall area on both sides of the flow path. It should be guided out through the vents in the idling wind wall close to the nozzle mechanism. The idling mechanism of some environmental wind tunnels uses a shutter structure to close the flow path and open two air doors on both sides of the flow path to guide the air flow to the idling wind wall. This structure type has many structural members, and it is necessary to realize an idling mode by simultaneously controlling the shutter and air door mechanism.

Nozzles in wind tunnels typically have two sizes, one large and one small, to suit different types of vehicle testing and wind speed needs. Most environmental wind tunnels use a manual method to change the nozzle type, and the flat, straight flow path at the top is removable, and if it needs to be changed to a small nozzle state, a fixed mold face block is used to replace the top. replaces the straight flow path of Alternatively, the ventilation opening change mechanism adopts a combination driving method of hand wheel-reducer-chain-screw slide rod to create a predetermined molding surface on the flexible plate at the top of the nozzle according to certain rules. In some cases, the change of the nozzle state is realized by

The manual replacement of the nozzle molding face block requires a large amount of labor, the work efficiency is low, and a sling needs to be erected in the factory. When the screw slide rod is used to push the flexible plate to form a predetermined forming surface, it is inevitable that the forming surface will have certain errors, which will further affect the wind tunnel test results.

At present, there is still no good solution for the above problems.

The wind tunnel idling and nozzle arrangement has an idling mechanism and a nozzle mechanism, a main flow passage passing through the idling mechanism and the nozzle mechanism in turn, the idling mechanism having an idling door body and an idling drive assembly, two The two idling door bodies are arranged on both sides of the main flow path, and the idling drive assemblies are arranged such that the idling door bodies contact each other along perpendicular to the airflow direction of the main flow path and move oppositely until the main flow path is closed. a driving or idling drive assembly driving the idling door body to move away along the direction of the air flow in the main flow passage until the main flow passage is fully open and the air flow flows out of the main flow passage, and the nozzle mechanism; has a nozzle module and a nozzle drive assembly, the two nozzle modules are arranged on both sides of the main flow path, and the nozzle drive assembly causes the nozzle modules to contact each other along the direction of air flow in the main flow path, and Drive the nozzle module to move in opposite directions until it blocks a portion of the main flow path and forms a small nozzle, or the nozzle drive assembly causes the nozzle module to align perpendicular to the airflow direction of the main flow path and completely open the main flow path. , are driven to move apart until they form a large nozzle.

Preferably, the idling drive assembly has a linear drive unit, a swing rod, a swing rod support base and a flute, the flute is provided on the idling door body, and one end of the swing rod is a swing rod. hingedly connected to the moving rod support base, the other end of the oscillating rod is fitted with a rotatable bearing wheel, the bearing wheel is rollingly fitted into said longitudinal groove, and the linear drive unit has a telescopic rod , the telescopic rod is hingedly connected to the rod body of the swinging rod, and is driven by a linear drive unit to push and pull the swinging rod to drive the idling door body to open or close the main passage;

Preferably, the bottom of the idling door body is provided with a support wheel for supporting the idling door body.

Preferably, both sides of the bottom of the idling door body are both provided with door body guide wheels, and the corresponding door body guide rails assist the movement of the idling door body.

Preferably, limit blocks are provided on both sides of the stroke of the idling door body to open and close the main passage, and when the idling door body is opened, the side wall of the idling door body near the main passage is inside the side wall of the main passage. The two idling door bodies are joined without a gap when they are aligned and closed without a step.

Preferably, said nozzle modules comprise a first nozzle module and a second nozzle module arranged on opposite sides of the main flow path by a nozzle support rack, and a nozzle drive assembly is biased by said first nozzle module of the nozzle support rack. a motor mounted on the other side and a chain wheel connected to its output shaft; the upper part of the first nozzle module has an 11th punching plate and a 12th punching plate; the upper part of the second nozzle module has: It has a 21st punching plate and a 22nd punching plate, one end of the chain wheel chain is fixed to the 11th punching plate, the other end of the chain is connected to one end of the first rope, and the other end of the first rope The end is fixed to the 21st punching plate, the other end facing the mounting motor of the nozzle support rack is mounted with a rope guide wheel, and the axis of the rope guide wheel is parallel to the airflow direction of the main flow path, One end of the second rope is fixed to the 22nd punching plate, and after winding around the rope guide wheel, it is fixed to the 12th punching plate, and the motor drives the rotation of the chain wheel, so that the chain is divided into two nozzles. The modules are pulled to move towards each other until they touch each other and form a small nozzle, or pulled to move apart until the main flow path is completely open and forms a large nozzle.

Preferably, the nozzle mechanism further comprises a nozzle transition portion, the nozzle transition portion connecting the nozzle modules together after the nozzle modules have moved toward each other until they contact each other. Alignment ensures no steps, yet the nozzle transition extends to the edge of the main stream in the airflow direction of the main flow path to ensure the integrity of the length of the nozzle.

Preferably, a clamping plate is connected to the outer circumference of at least one nozzle module, and when the nozzle modules move toward each other until they come into contact with each other, the clamping plate pushes the outer side wall of the main channel and is clamped by the locking unit. A clamping seal strip is attached to the clamping plate to lock the clamping plate to limit the movement of the nozzle module and to the panel on one side of the clamping plate from the main flow path.

Preferably, the apparatus further comprises an idling wall body, and the two idling wall bodies are provided on the outer periphery of the main flow path on both sides of the main flow path of the idling door body in the air flow direction, and furthermore, on the side of the idling door body remote from the nozzle mechanism. The side wall of the main flow passage is provided with a side exhaust port, and the idling wall body near the nozzle mechanism is provided with a ventilation window. leak.

The present invention also provides a method of controlling a wind tunnel idle and nozzle arrangement, for controlling the wind tunnel idle and nozzle arrangement described above, wherein the idle door body opens and closes the main flow path. The control method is as follows. After receiving the command to close the main flow path of the idling mechanism, the idling drive assembly drives the idling door body to move toward each other, and when the idling door body moves to the position of the door body closing proximity switch, the idling After the driving assembly cuts off the driving force to the idling door body and triggers the counter, and the set time is reached, the idling driving assembly again causes the idling door body to approach the position of the door body closing limit block oppositely. After receiving the command to drive to move, hold tight and open the main flow path of the idling mechanism, the idling drive assembly drives the idling door body to move apart and away so that the idling door body When the position of the door body opening proximity switch is reached, the driving force of the idling drive assembly to the idling door body is cut off, and the counter is triggered. After reaching the set time, the idling drive assembly again switches the idling door body to The method of driving away and moving apart to the position of the open limit block and keeping the clamping state, where the nozzle module is controlled to form large nozzles and small nozzles, is as follows. When the nozzle gives an open signal, the nozzle drive assembly drives the nozzle modules to move apart and, after moving to position, triggers a nozzle open limit switch and the nozzle module stops moving. , forming a large nozzle, and when the nozzle gives a closed signal, the nozzle drive assembly drives the nozzle modules to move toward each other, and after moving to the position, triggers the nozzle closed limit switch, and the nozzle The module stops moving and forms a small nozzle.

The present invention provides an idle and nozzle arrangement for a wind tunnel, the idle and nozzle arrangement comprising an idle mechanism and a nozzle mechanism. When the idling door body opens, the idling door plate is aligned with the inner side wall of the main channel and is part of the air channel; when the idling door body closes, the two idling door bodies can block the channel; The airflow is guided into the idling wind wall and discharged through the ventilation windows of the idling wind wall. The present invention is compact in structure, only by controlling the expansion and contraction of the telescopic rod of the linear drive unit, the idling mechanism can control the closing and opening of the main channel, the structure is simple, the efficiency is high, Equipment failure rate can be effectively reduced.

The nozzle mechanism of the present invention employs a motor-driven chain wheel to pull and move a rope fixedly connected to each nozzle module by a chain of the chain wheel to control switching of the nozzles. In the large nozzle state, the nozzles are aligned inside the side walls of the main channel and are part of the air duct, and when switched to the small nozzle state, the two nozzle modules are connected. The outlet is equipped with a nozzle transition part, the nozzle transition part is a processed part made of aluminum, the nozzle transition part and the nozzle module adopt a positioning engagement block, and the joints of the nozzle module are aligned and there is no step. We guarantee that. The nozzle mechanism of the present invention is compact in structure and adopts motor drive to reduce labor. The nozzle module is a fixed molding surface block, and the profile line obtained is more precise than the method of pressing the flexible plate with a helical screw. The nozzle mechanism is a double nozzle integrated structure, which can freely switch between large and small nozzles to meet the needs of various types of vehicle testing and higher wind speeds.

Next, an embodiment thereof will be described with reference to the drawings, and the above-mentioned features and technical advantages of the present invention will become more clearly and easily understood.

FIG. 4 shows a plan view of the air flow direction of the wind tunnel idling and nozzle device when the idling mechanism of the embodiment of the present invention is open; FIG. 4 shows a plan view of the air flow direction of the wind tunnel idling and nozzle device when the idling mechanism of the embodiment of the present invention is closed; 1 shows a plan view of an idling and nozzle arrangement according to an embodiment of the present invention; FIG. 1 shows a schematic plan view of an idle drive assembly in accordance with an embodiment of the present invention; FIG. 1 shows a top schematic view of a nozzle drive assembly in accordance with an embodiment of the present invention; FIG. Fig. 4 shows a schematic view of the air flow direction in the main flow path when the nozzle mechanism of an embodiment of the present invention is open; Fig. 4 shows a schematic view of the air flow direction in the main flow path when the nozzle mechanism of an embodiment of the present invention is closed; FIG. 4 shows a control logic diagram for the idle door body of an embodiment of the present invention; FIG. 4 shows a control logic diagram for a nozzle module in accordance with an embodiment of the present invention;

Next, an embodiment of a wind tunnel idling and nozzle device and a control method thereof according to the present invention will be described with reference to the drawings. Those skilled in the art will recognize that the described embodiments can be modified in a variety of different ways or combinations thereof without departing from the spirit and scope of the invention. The drawings and description are therefore illustrative in nature and are not intended to limit the scope of protection of the claims. Also, in this specification, the drawings are not drawn to scale and like drawing symbols refer to like parts.

1 and 2 are plan views of an idling and nozzle device for a wind tunnel according to an embodiment of the present invention in the airflow direction. Next, first, based on FIGS. 1 and 2, idling and movement of airflow in the nozzle device will be described. As shown in FIGS. 1 and 3, this wind tunnel idling and nozzle device has an idling mechanism 1 and a nozzle mechanism 2 which are connected in series, both of which can be connected by flange bolts, but other Any conventional connection method may be adopted, such as adhesive connection, welding connection, riveting connection, and the like. A horizontal main flow path 11 is formed through the idling mechanism 1 and the nozzle mechanism 2 in sequence. Airflow exiting the main flow path 11 reaches a test area T for testing the performance of the vehicle at different wind speeds. As shown in FIG. 1, when the idling mechanism 1 is open, the wind flows from the main flow path 11, and when the idling mechanism 1 is closed, as shown in FIG. Can meet vehicle idling mode simulation test. Moreover, the nozzle mechanism is a double nozzle integrated structure, which can realize free switching between large and small nozzles, and can meet the needs of various types of vehicle tests and higher wind speeds.

3 shows a plan view of an idle and nozzle arrangement in accordance with an embodiment of the present invention, and FIG. 4 shows a plan schematic view of an idle drive assembly in accordance with an embodiment of the present invention. Next, based on FIGS. 3 and 4, the idling mechanism will be described in detail. The idling mechanism 1 has a main channel 11, an idling door body support rack 12, an idling door body 14, a linear guide rail 18, an idling drive assembly and so on. Two idling door bodies 14 are provided on both sides of the main flow path 11 respectively by corresponding idling door body supporting racks 12 . Since both sides have a symmetrical structure, only one of them will be described below as an example. The idling door body support rack 12 is a frame-type structure, with a plurality of longitudinally and laterally connected transverse rods, longitudinal rods and diagonal supports. The idling door body 14 is a frame structure in which a plurality of horizontal rods, vertical rods and diagonal supports are connected. Moreover, a door panel 144 is formed on one side of the frame structure, and the door panel 144 is a vertical plane. A linear guide rail 18 is mounted on the upper part of the idling door body supporting rack 12, and two linear guide rails 18 are arranged separately on both sides of the upper part of the idling door body supporting rack 12, correspondingly corresponding to the upper part of the idling door body. is provided with slide blocks 1413 that engage with the linear guide rails 18 above the idling door main body support rack 12 along the airflow direction of the main flow path 11 . The slide blocks 1413 are slidably connected to the linear guide rails 18 respectively, and the idling door body 14 is perpendicular to the airflow of the main flow path 11 along the linear guide rails 18 by the slide blocks 1413 fixedly connected thereto. slide horizontally in the direction. An idling drive assembly is provided for each of the idling door bodies 14 on both sides, and the idling drive assemblies are arranged so that the idling door bodies 14 can simultaneously face each other or move away from each other horizontally in the direction perpendicular to the airflow of the main flow passage 11. It is driven to move, thereby closing or opening the main channel 11 . In the above description, the idling door body is positioned horizontally on both sides of the main flow path as an example, but this embodiment does not exclude the case where the idling door body is positioned on both upper and lower sides of the main flow path.

The main channel 11 is a horizontal tapered opening whose sidewalls are smooth planes to take advantage of wind flow. The door panel 144 of the side wall of the idling door body 14 near the main flow path 11 is a vertical plane, and when the idling door body 14 moves apart (that is, when the idling door body opens), the idling door plate 14 The side walls (ie, door panel 144) proximate the main flow path 11 are flush with the inner side walls of the main flow path 11 and form part of the main flow path. When the idling door bodies 14 move toward each other until they contact each other (that is, when the idling door bodies close), the area of the two idling door bodies 14 can completely block the main flow path 11. Since the wind cannot flow out of the main flow path 11, the wind velocity in the plane to which the vehicle under test is exposed is zero, satisfying the idle test condition.

Here, the main channel 11 preferably has a tapered vertical cross-section, but other shapes are not excluded, for example, the vertical cross-section of the main channel 11 can also be circular, elliptical, polygonal, Furthermore, the cross section may have any shape of a closed curve. Correspondingly, the door panel 144 of the idle door body 14 has a flat or curved surface that conforms to the side wall inner walls on either side of the main flow path. That is, the idling door bodies on both sides can tightly close the main flow path when closed, and the door panels 144 of the idling door body 14 can smoothly transition to the corresponding sidewalls of the main flow path 11 when open. .

As shown in FIG. 3, the nozzle mechanism 2 has a nozzle support rack 21, a nozzle guide rail 22, a nozzle drive assembly and a nozzle module. The nozzle support rack 21 also has a frame structure in which horizontal rods and vertical rods are connected. The main flow path 11 passing through the idling mechanism 1 continues through the nozzle mechanism 2 . Nozzle modules are provided on both sides of the main channel 11 respectively. Specifically, as shown in FIGS. 3 and 5 , the first nozzle module 241 is positioned on the right side of the main flow path 11 and the second nozzle module 242 is positioned on the left side of the main flow path 11 . The nozzle drive assembly moves the two nozzle modules horizontally toward each other and drives them firmly into contact with each other, and after contacting each other, the main flow passages 11 of the two nozzle modules are driven. is smaller than the cross section of the main flow path 11, so that a part of the main flow path 11 can be blocked, forming a small nozzle mode. Alternatively, the two nozzle modules can be moved horizontally apart and the main flow path 11 is fully open to form a large nozzle mode. Moreover, preferably, the nozzle modules are mounted on both sides of the upper portion of the main flow path, and when the two nozzle modules are in solid contact with each other, the nozzle modules block the airflow above the main flow path. As shown in FIG. 6, when the nozzle module is in the large nozzle mode, the airflow flows along the main flow path 11 horizontally. As shown in FIG. 7, when the nozzle module is in the small nozzle mode, the nozzle module blocks the upper airflow of the main flow path 11, so when the airflow reaches the nozzle module, it changes the wind direction and flows out around the nozzle module.

In the idling and nozzle device of this embodiment, when the idling door body is opened, the side walls of the idling door body near the main flow path are aligned inside the side walls of the main flow path to form part of the main flow path. When the idling door body closes, the two idling door bodies can completely block the main flow path. The nozzle mechanism is a double nozzle integrated structure, which can freely switch between large and small nozzles to meet the needs of various types of vehicle testing and higher wind speeds.

In an alternative embodiment, the outer circumference of the idling mechanism 1 further comprises two spaced apart idling wind walls 31, 32, one of which the idling wind wall 31 is connected to the nozzle mechanism of the idling mechanism 1. The other idling wind wall 32 is positioned on the side of the idling mechanism 1 closer to the nozzle mechanism 2 . Alternatively, the idling airflow walls 31 and 32 are arranged separately on both sides along the airflow direction of the main flow path of the idling door body 14 . The idling wind walls 31 and 32 are connected to the outer circumference of the idling mechanism 1 without gaps, an idling wind wall region is formed between the two idling wind walls, and the idling wind wall 32 is provided with a ventilation window 321. - 特許庁In addition, as shown in FIG. 2, a lateral exhaust port 111 is provided on the side wall of the main flow path on the side remote from the nozzle mechanism of the idling door body. When the main flow path is closed, the airflow can only reach the idling wind wall area via the lateral outlet 111 and is discharged from the ventilation window 321 of the idling wind wall 32 .

In an alternative embodiment, the idle drive assembly includes a linear drive unit, oscillating rod 193, oscillating rod support base 194, bearing wheels 195, flutes 196, and associated control valves. The linear drive unit has a linearly moving telescopic rod, and the linear drive unit can be, for example, one of a hydraulic cylinder, an air cylinder, an electric slide rod. In this embodiment, only an air cylinder will be explained as an example. As shown in FIG. (the rod body here refers to the portion of the oscillating rod between the two rod edges). Preferably, the piston rod of the air cylinder 191 is hinged to approximately the center of the wobble rod 193 (the term 'center' here is only approximate and not strictly the center of the wobble rod). ). One end of the swing rod 193 is hinged to a swing rod support base 194, which is fixed to the idling door body support rack 12 by bolts. A vertical groove 196 is fixed to the door body frame 143 , and the other end of the swing rod 193 is mounted in the vertical groove 196 by rotatably sliding or rolling. For example, at the other end of the oscillating rod 193 is mounted a rotatable bearing wheel 195 which rolls and is mounted within a flute 196 . When the piston rod is extended, the wobble rod 193 is mounted on a bearing wheel 195 in a flute 196 and slides in the flute 196 and also pivots the hinge connection point 197 of the wobble rod support base 194 to the center. , thereby pushing the idling door bodies 14 on both sides toward each other to achieve the purpose of closing the main passage 11 . When the piston rod is retracted, the oscillating rod 193 is mounted on a bearing wheel 195 in a longitudinal groove 196 and slides in the longitudinal groove 196, and the hinge connection point of the oscillating rod support base 194 is the center of the circle. It rotates in the opposite direction, thereby pushing the idling door bodies 14 on both sides to move away from each other to achieve the purpose of opening the main passage 11 . This swing rod 193 acts to reduce the stroke of the air cylinder. For example, when the actual stroke of the idling door body 14 in the idling mechanism 1 is 1250 mm, the air cylinder directly pushes the idling door body 14 to move the air. The stroke of the cylinder is at least 1250 mm, while the stroke of the air cylinder can be obviously reduced when the idling door body 14 is moved by pushing the rocking rod 193 with the air cylinder. Through simulation motion analysis, the stroke of the air cylinder can be reduced to 650mm.

In an alternative embodiment, the idling door body 14 is further provided with a support wheel 13 , which is mounted on the bottom of the idling door body 14 and receives the weight of the idling door body 14 . As shown in FIG. 4, the two support wheels 13 are located at the bottom of both ends in the horizontal direction perpendicular to the airflow direction of the main flow path of the idling door body 14 .

In an alternative embodiment, the bottom of the idling door body 14 is provided with door body guide wheels 16 along both sides of the main flow path in the air flow direction, and the idling door door body support rack 12 has corresponding door body guide wheels. It has a door body guide rail for sliding the wheel 16, the door body guide wheel 16 can provide auxiliary guidance for the idling door body, so that the door body moves quickly, and the air driving in the airflow direction guaranteed to receive a load of

In an optional embodiment, the idling mechanism 1 is provided with limit blocks at both end positions of the stroke of the idling door body 14, and when the idling door body 14 is opened, the side wall near the main flow path is inside the side wall of the main flow path. It is possible to accurately guarantee that the two idling door bodies 14 are joined together without gaps when they are closed without a step. The open limit block and the closed limit block may be of rubber material.

5, the nozzle drive assembly will now be described in detail. In an alternative embodiment, the nozzle drive assembly has a motor 231 and a shaft coupling connected to its output shaft. A chain wheel 233 is attached to the end of the shaft coupling. Both the motor 231 and the chain wheel 233 are fixed to the side of the nozzle support rack 21 near the first nozzle module 241. The chain wheel 233 has a chain 2331. is installed. Two punching plates parallel to the airflow direction of the main channel are provided on the top of each nozzle module. Specifically, an eleventh punching plate 235 and a twelfth punching plate 236 are provided above the first nozzle module 241 , and a twenty-first punching plate 237 and a twenty-second punching plate 238 are provided above the second nozzle module 242 . is provided. One end of the chain 2331 is fixed to the eleventh punching plate 235 by a chain fixed end 2351 . The other end of the chain 2331 is connected to one end of the first rope 232, the other end of the first rope 232 passes through the eleventh punching plate 235 and the twelfth punching plate 236 of the first nozzle module 241, and the second The rope fixing end 2371 is fixed to the 21st punching plate 237 of the second nozzle module 242 . A rope guide wheel 234 is mounted on the other end of the nozzle support rack 21 facing the mounting motor 231 , and the axis of the rope guide wheel 234 is parallel to the airflow direction of the main flow path 11 . One end of the second rope 239 is fixed to the twelfth punching plate 236 of the first nozzle module by the first rope fixed end 2361, wound around the rope guide wheel 234, and the other end is fixed by the third rope fixed end 2381. It is fixed to the 22nd punching plate 238 of the 2nd nozzle module. The entire nozzle drive assembly and the rope guide wheel form a connecting ring, and when the chain wheel 233 rotates clockwise, the chain 2331 pulls the first nozzle module 241 away from the main flow path 11 and simultaneously moves the second nozzle module. Relax the pull on 242 . The punching plate 236 of the first nozzle module 241 pulls the second rope 239 toward the main flow path, and the second rope 239 moves the second nozzle module 242 away from the main flow path 11 via the rope guide wheel 234. Thus, the first nozzle module moves away from the main channel 11 at the same time as the second nozzle module until the main channel is completely opened, at which time it is in the large nozzle state.

As the chain wheel 233 rotates counterclockwise, the first rope 232 pulls to move the second nozzle module 242 toward the main flow path 11 , and the second rope 239 also moves through the rope guide wheel 234 toward the main flow path 11 . pull the first nozzle module 241 to . At the same time, the two nozzle modules move toward each other until they come into contact with each other, and act to block a part of the main flow path, at which time they are in a small nozzle state. As a matter of course, if the four punching plates do not block the movement of the ropes, the second rope and the first rope do not need to pass through each punching plate, and may be fixed by each rope fixed end.

In an alternative embodiment, as shown in FIG. 7, to ensure that the mating surfaces are aligned after the two nozzle modules come into contact with each other, the front part of the nozzle module along the airflow direction is is mounted with a nozzle transition portion 27, which matches the width of the main flow path, is connected to the nozzle module by a positioning engagement block, firmly connects the two nozzle modules together, and joins the nozzle modules. Ensure that the surfaces are aligned and there are no steps. Moreover, the nozzle transition portion 27 extends to the edge of the main flow path in the airflow direction of the main flow path. That is, the nozzle transition section 27 is also for the transition of the front end region of the nozzle module and ensures the integrity of the nozzle length.

In an alternative embodiment, the nozzle transition is an aluminum part.

In an optional embodiment, it also has a locking unit 26 . Specifically, at least one nozzle module is provided with a clamping plate 261 on its outer circumference. A clamping plate 261 can be pushed to limit the movement of the nozzle module to either side.

In an alternative embodiment, in the case of small nozzles, the nozzle module is sealed to the outer surface of the flow path in the form of a tightening sealing strip (not shown). Specifically, the clamping plate 261 has a clamping seal strip attached to the panel facing outward of the main flow path, and the clamping plate 261 is clamped by the locking unit 26 after the nozzle modules have come into contact with each other. The attachment plate 261 can be pushed against the outer wall of the main channel to seal the main channel well.

In an optional embodiment, the stroke start and end positions of the nozzle modules on both sides adopt limit switches and mechanical limit baffle blocks respectively, and the nozzle modules contact the mechanical limit baffle blocks to stop moving and limit Trigger the switch, which controls the motor to stop, ensuring the accuracy and reliability of nozzle switching and the safety of the mechanism. Specifically, it has a nozzle open limit switch and a nozzle close limit switch. When the nozzle gives an open signal, the motor 231 rotates, driving the nozzle modules to move away from each other by the chain wheel 233, and after moving to the position, triggers the nozzle open limit switch, and the motor 231 When the motion stops, forming a large nozzle, and the nozzle gives a closing signal, the motor 231 rotates in reverse, and the chain wheel 233 drives the nozzle modules to move toward each other, after moving to the position , triggers the nozzle closing limit switch and the motor 231 stops moving to form a small nozzle.

In an alternative embodiment, the wind-receiving surface of the nozzle module is a streamlined curved surface, which favors air flow.

In an alternative embodiment, when the first nozzle module and the second nozzle module are moved apart until the main flow path is fully open, resulting in a large nozzle state, the sidewalls of each nozzle module near the main flow path are , are aligned inside the side walls of the main channel and form part of the main channel.

The present invention further provides a method for controlling the idling and nozzle device, wherein the method for controlling the idling door body to open and close the main flow path is as follows. After receiving the command to close the main flow path of the idling mechanism, the idling drive assembly drives the idling door body to move toward each other, and when the idling door body moves to the position of the door body closing proximity switch, the idling After the driving assembly cuts off the driving force to the idling door body and triggers the counter, and the set time is reached, the idling driving assembly again causes the idling door body to approach the position of the door body closing limit block oppositely. After receiving the command to drive to move, hold tight and open the main flow path of the idling mechanism, the idling drive assembly drives the idling door body to move apart and away so that the idling door body When the position of the door body opening proximity switch is reached, the driving force of the idling drive assembly to the idling door body is cut off, and the counter is triggered. After reaching the set time, the idling drive assembly again switches the idling door body to Drive to move away from the position of the open limit block, keep the tightening state,
Here, the method of controlling the nozzle module to form large nozzles and small nozzles is as follows. When the nozzle gives an open signal, the nozzle drive assembly drives the nozzle modules to move apart and, after moving to position, triggers a nozzle open limit switch and the nozzle module stops moving. , forming a large nozzle, and when the nozzle gives a closed signal, the nozzle drive assembly drives the nozzle modules to move toward each other, and after moving to the position, triggers the nozzle closed limit switch, and the nozzle The module stops moving and forms a small nozzle.

As shown in FIG. 8, after receiving a command to close the main flow passage of the idling mechanism, the idling door body 14 is moved to face and approach by the urging of the air cylinder 191, and the idling door body 14 approaches door body closing. Moving to the position of the switch triggers the counter, and after reaching the set time, the idling door body 14 moves again to the position of the door body closing limit block and remains closed.

After receiving the command to open the main flow path of the idling mechanism, the idling door body 14 is moved apart by the thrust of the air cylinder 191, and when the idling door body 14 moves to the position of the door body opening proximity switch, After triggering the counter and reaching the set time, the idling door body 14 moves to the position of the door body opening limit block again and keeps the clamping state.

A 3-position 5-port solenoid valve may be used to control the operation of the air cylinder 191, an example of which will now be described. After receiving the command to close the main flow path of the idling mechanism, the 3-position 5-port solenoid valve controls the piston rod of the air cylinder 191 of the idling air door to extend, and the piston rod 191 reaches the position of the door body closed proximity switch. , the solenoid valve is switched to the intermediate position to switch from the air supply state to the closed state, cutting off the air supply and exhaust to the air cylinder. However, since the idling door body 14 also has a certain inertia, it will continue to pull and pull the piston rod to extend, and at the same time trigger the counter. The air supply end is controlled to open again, and at the same time, the idling door body 14 also moves to the position of the door body closing limit block to keep the tightening state.

After receiving the command to open the main passage of the idling mechanism, the 3-position 5-port solenoid valve controls the piston rod of the air cylinder 191 of the idling door body to contract, and when the piston rod moves to the position of the door body opening proximity switch, , the solenoid valve goes from the air supply state to the closed state, the idling door body 14 compresses the piston rod by inertia, causing the piston rod to continue to contract, and at the same time triggers the system counter, after reaching the set time, The solenoid valve controls the contracted air supply end of the air cylinder to open, and at the same time the idling door body 14 also moves to the position of the door body opening limit block and holds the closed state. Here, the door body closing proximity switch and the door body opening proximity switch may be provided at predetermined positions on the cylinder body of the air cylinder, or may be provided on the idling door body support rack 12 .

Due to the heavy weight of the idling door, the inertia in the process of the air cylinder driving the movement of the idling door body is large. To decelerate in advance when an idling door body is going to close or open soon. After the solenoid valve supplies air again, it quickly moves to the position of the door body closing or door body opening limit block to keep the closed state.

The nozzle module control unit adopts 380V AC to power the motor 231, and controls the forward and reverse rotation of the motor 231 by means of a contactor. As shown in FIG. 9, when a nozzle gives an open signal, the corresponding contactor closes and the motor 231 rotates, driving the nozzle modules apart and apart by the chain wheel 233 to move into position. After that, the nozzle opening limit switch is triggered, the contactor is turned off, the motor 231 stops moving, and the large nozzle is formed.

When a nozzle gives a closed signal, the corresponding contactor closes and the motor reverses, driving the nozzle modules to move toward each other by the chain wheel 233, moving to the position and then the nozzle closed limit switch. , the contactor is turned off, motor 231 stops moving, and a small nozzle is formed.

The wind tunnel idling and nozzle arrangement of the present invention has a serially connected idling mechanism and a nozzle mechanism located at the periphery of the main flow path. When the idling door body opens, the side walls of the idling door body close to the main flow path are aligned with the inner side walls of the main flow path and form part of the main flow path, and when the idling door body closes, the two idling door bodies are: The main flow path is completely blocked, and the airflow can only enter the idling wind wall area and be discharged through the ventilation window of the idling wind wall. The idling drive assembly pushes and pulls the swaying rod by the linear drive unit to drive the idling door body to move horizontally, and the swaying rod magnifies the movement of the idling door body, which is equivalent to the linear drive It can effectively reduce the stroke of the unit and save the cost in selecting the type of equipment. Moreover, since the stroke of the linear drive unit is small, the idling mechanism can be made more compact and the space occupied can be reduced. The bottom part supports the idling door body by supporting wheels, and the top part adopts two sets of linear guide rails placed on the idling door body supporting rack and the sliding block connected to the idling door body for precise guidance. Moreover, both sides of the bottom of the idling door body are supplementarily guided by the door body guide wheels to ensure that the door body can move quickly and receive the load of the air driving in the airflow direction.

Moreover, its nozzle mechanism is a double nozzle integrated structure, which can realize free switching between large and small nozzles, and can meet the needs of various types of vehicle tests and higher wind speeds. A chain driven by a chain wheel is employed to pull the rope connected to each nozzle module, thereby driving the nozzle module to open or close the main channel. Its driving method is simple and highly efficient. When the nozzle modules move toward each other until they come into contact with each other, the clamping plate and locking unit limit the movement of the nozzle modules to either side. In the case of small nozzles, the nozzle module is sealed to the outer flow channel surface in the form of a clamping sealing strip. The stroke start and end positions of the nozzle modules on both sides adopt limit switches and mechanical limit baffle blocks respectively to ensure the accuracy and reliability of nozzle switching and the safety of the mechanism. The nozzle module is a fixed molding surface block, and the resulting airflow profile line is more accurate than the method of pressing the flexible plate with a spiral screw. The wind-receiving surface of the nozzle module is a streamlined curved surface, which is advantageous for air flow. In the large nozzle state, the side walls of each nozzle module close to the main flow path are aligned inside the side walls of the main flow path and form part of the main flow path. The nozzle transition portion is connected to the nozzle modules by a positioning engagement block to firmly connect the two nozzle modules together and ensure that the joints of the nozzle modules are aligned and free of steps. Moreover, the nozzle transition extends in the airflow direction of the main flow path to the edge of the main flow path to ensure the integrity of the length of the nozzle.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention, and various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.

Claims (10)

An idling and nozzle device for a wind tunnel having an idling mechanism and a nozzle mechanism, wherein a main flow passage passes through the idling mechanism and the nozzle mechanism in sequence,
The idling mechanism has an idling door body and an idling drive assembly, the two idling door bodies are arranged on both sides of the main flow path, and the idling drive assembly is configured such that the idling door bodies are aligned perpendicularly along the airflow direction of the main flow path. , contact each other and drive opposite movement until the main flow path is closed, or the idle drive assembly drives the idling door body along perpendicular to the airflow direction of the main flow path until the main flow path is fully open and the airflow is closed. is driven to move away from the main flow path until
The nozzle mechanism has a nozzle module and a nozzle drive assembly, the two nozzle modules are arranged on both sides of the main flow path, and the nozzle drive assembly causes the nozzle modules to contact each other perpendicularly to the airflow direction of the main flow path. and drive the nozzle module to move in opposite directions until it blocks a portion of the main flow path and forms a small nozzle, or the nozzle drive assembly causes the nozzle module to follow the airflow direction of the main flow path perpendicularly to completely close the main flow path. An idler and nozzle apparatus for a wind tunnel, characterized in that it opens wide and is driven to move apart until it forms a large nozzle. The idling drive assembly has a linear drive unit, a swaying rod, a swaying rod support base, and a longitudinal groove, the slat being provided in the idling door body, and one end of the swaying rod being the swaying rod support. Hinge-connected to the base, the other end of the oscillating rod is equipped with a rotatable bearing wheel, the bearing wheel is rollingly mounted in the longitudinal groove, the linear drive unit has a telescopic rod, the telescopic 2. The rod according to claim 1, characterized in that the rod is hingedly connected to the rod body of the swinging rod, and is driven by a linear drive unit to push and pull the swinging rod to drive the idling door body to open or close the main passage. wind tunnel idling and nozzle equipment. 2. The idling and nozzle device for a wind tunnel according to claim 1, wherein the bottom of the idling door body is provided with a support wheel for supporting the idling door body. The idling door and nozzle for wind tunnel according to claim 1, characterized in that both sides of the bottom of the idling door body are provided with door body guide wheels, and corresponding door body guide rails assist the movement of the idling door body. Device. Limit blocks are provided at both ends of the stroke of the idling door body to open and close the main passage. The idling and nozzle device for a wind tunnel according to claim 1, wherein the two idling door bodies are joined without a gap when closed without a gap. The nozzle modules have a first nozzle module and a second nozzle module arranged on opposite sides of the main flow path by a nozzle support rack, and a nozzle drive assembly is located on a side of the nozzle support rack proximate the first nozzle module. and a chain wheel connected to its output shaft, the upper part of the first nozzle module has an 11th punching plate and a 12th punching plate, and the upper part of the second nozzle module has a 21st punching plate. A punching plate and a 22nd punching plate, one end of the chain of the chain wheel is fixed to the eleventh punching plate, the other end of the chain is connected to one end of the first rope, and the other end of the first rope is , fixed to the 21st punching plate, a rope guide wheel is mounted on the other end facing the mounting motor of the nozzle support rack, and the axis of the rope guide wheel is parallel to the airflow direction of the main flow path, and the second One end of the rope is fixed on the 22nd punching plate, and after winding around the rope guide wheel, it is fixed on the 12th punching plate, and the motor drives the rotation of the chain wheel, so that the chain can be Claim 1 characterized in that they are pulled to move toward each other until they come into contact with each other and form a small nozzle, or they are pulled to move apart until the main flow path is completely opened and a large nozzle is formed. Wind tunnel idling and nozzle apparatus according to . The nozzle mechanism further includes a nozzle transition portion, after which the nozzle modules move oppositely until they contact each other, the nozzle transition portion connects the nozzle modules together so that the points of contact of the nozzle modules are: Claim 1 characterized in that the nozzle transition extends to the edge of the main flow path in the direction of airflow of the main flow path to ensure the integrity of the length of the nozzle. Wind tunnel idling and nozzle apparatus according to . A clamping plate is connected to the outer circumference of at least one nozzle module, and when the nozzle modules move oppositely until they come into contact with each other, the clamping plate pushes the outside of the side wall of the main flow channel, and the locking unit locks the clamping plate. 2. The wind tunnel according to claim 1, further comprising: a clamping seal strip attached to a panel on one side of the main flow path of the clamping plate to limit movement of the nozzle module. Idling and nozzle device. It further has an idling wall body, and the two idling wall bodies are provided on the outer periphery of the main flow path on both sides of the main flow path of the idling door body in the airflow direction, and furthermore, on the side of the main flow path away from the nozzle mechanism of the idling door body. The side wall is provided with a side exhaust port, and the idling wall body near the nozzle mechanism is provided with a ventilation window. The wind tunnel idling and nozzle device according to claim 1. A wind tunnel idling and nozzle device control method for controlling the wind tunnel idling and nozzle device according to any one of claims 1 to 9,
A method for controlling the idling door body to open and close the main flow passage,
After receiving the command to close the main flow path of the idling mechanism, the idling drive assembly drives the idling door body to move toward each other, and when the idling door body moves to the position of the door body closing proximity switch, the idling After the driving assembly cuts off the driving force to the idling door body and triggers the counter, and the set time is reached, the idling driving assembly again causes the idling door body to approach the position of the door body closing limit block oppositely. Drive to move, keep tightening condition,
After receiving the command to open the main passage of the idling mechanism, the idling drive assembly drives the idling door body to move apart and away, and when the idling door body moves to the position of the door body open proximity switch, the idling After the driving assembly cuts off the driving force of the idling door body and triggers the counter, and the set time is reached, the idling driving assembly moves the idling door body apart again to the position of the door body opening limit block. It is to drive to move and keep the clamping state,
Here, the method for controlling the nozzle module to form large nozzles and small nozzles includes:
When the nozzle gives an open signal, the nozzle drive assembly drives the nozzle modules to move apart and, after moving to position, triggers a nozzle open limit switch and the nozzle module stops moving. , forming a large nozzle,
When the nozzle gives a closed signal, the nozzle drive assembly drives the nozzle modules to move toward each other, and after moving to the position, triggers a nozzle closed limit switch, and the nozzle module stops moving. , forming a small nozzle.

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