A quick-acting wind tunnel viewing window protection device

Abstract

The application relates to a quick-action wind tunnel observation window protection device, which can effectively avoid the impact and scratching of impurity particles on the window glass at the moment when the experiment ends, and prolong the service life of optical glass. The device comprises a control system, a rack, a window protection assembly arranged on the rack, and a driving and releasing assembly arranged on one side of the window protection assembly and used for controlling the opening and closing of the window protection assembly. In the working process, the output end of the driving device in the driving and releasing assembly is connected with the window protection plate, so that the window protection plate can be opened. When it is needed to be closed, the control system controls the releasing assembly to release the connection between the driving device and the window protection plate, so that the window protection plate is quickly bounced back under the action of the compression spring, and the protection of the wind tunnel observation window is realized within 0.3 seconds.

Description

Technical Field

[0001] This invention relates to a protective device for optical equipment, specifically a wind tunnel observation window protection device that operates rapidly. Background Technology

[0002] A wind tunnel is a device used to simulate the operating state and aerodynamic characteristics of an aircraft in an atmospheric environment. It is generally a tubular structure with a continuously increasing diameter, and the flight model to be tested is fixedly installed inside the wind tunnel test section. During the experiment, airflow is generated inside the wind tunnel and blows towards the flight model. The relative motion between the airflow and the flight model simulates the aircraft's flight state in the air, thereby testing and verifying various flight design parameters. To obtain various flow parameters of the test area, various optical observation equipment is required, such as schlieren and shadow meters. These devices observe various physical quantities inside the wind tunnel test section through observation windows, placing high demands on the surface cleanliness and surface shape of the observation window glass. However, at the end of the experiment, a drastic pressure change occurs within the wind tunnel for a short period. After the high-speed airflow inside is interrupted for about 0.5 seconds, the resulting turbulent airflow carries a large amount of impurities and dust from inside the wind tunnel, impacting and scratching the observation window glass, thus affecting its surface quality.

[0003] Traditional wind tunnel observation windows are protected using a "gate valve" method, which has a single opening and closing time of more than 6 seconds, and the opening and closing position is difficult to stabilize and lock. When closing, it has a large impact on the mounting frame, resulting in limited protection for the wind tunnel observation window glass. Chinese patent CN106679931 discloses a schlieren tube protection device and a schlieren tube, which sets left and right baffles inside the chamber and protects the window through a servo motor and ball screw drive. However, due to its transmission method, the protection action takes about 2 seconds to complete, which is insufficient to completely prevent impurity particles from impacting and scratching the optical window at the moment of observation's end. Chinese patent CN105889539 discloses a large-scale split-type schlieren instrument protection device, which sets two valve plates inside the schlieren instrument valve body. The two valve plates are slidably connected to a slide rail assembly by a slider. When the schlieren tube diameter of the schlieren instrument is 1250mm, the closing stroke of the above device takes about 3 seconds, which is also insufficient to completely prevent impurity particles from impacting and scratching the window at the moment of observation's end. In addition, the development cost of the wind tunnel window is nearly one million yuan, and its processing and testing cycle is about half a year, making replacement costly in terms of both economy and time. Therefore, how to effectively avoid the impact and scratching of impurity particles on the observation window glass at the moment of wind tunnel observation's end and extend the service life of the window glass is an important problem that urgently needs to be solved in wind tunnel experiments. Summary of the Invention

[0004] The main purpose of this invention is to solve the problem that existing wind tunnel observation window protection devices are unable to effectively prevent impurity particles from impacting and scratching the window glass at the moment the experiment ends, thus reducing the service life of the optical glass, and to provide a fast-acting wind tunnel observation window protection device.

[0005] To achieve the above-mentioned objectives, the present invention provides the following technical solution:

[0006] A fast-acting wind tunnel observation window protection device includes a frame, with a light-transmitting opening of a diameter adapted to the wind tunnel observation window at a position corresponding to the window; its special feature is that:

[0007] The frame is equipped with a window protection assembly, which includes two guide rods arranged parallel to each other at the inner edge of the frame. Each guide rod has a traction sleeve, a compression spring and a spring limit seat installed sequentially from the outside to the inside on the side near the light-transmitting opening. Window protection plates are fixedly installed on the side walls of the two traction sleeves, and the position of the window protection plates corresponds to the position of the light-transmitting opening on the frame.

[0008] The frame also has two parallel common guide rails inside, and the extension direction of each common guide rail is parallel to the extension direction of the guide rod. The window protection plate is slidably connected to the common guide rails through at least one protection plate slider on each side, thereby providing auxiliary guidance for the window protection plate. A drive and release assembly for opening and closing is provided between the inner end of the window protection plate and the frame. The drive and release assembly includes a drive device and a release assembly. The drive device is connected to the frame, and its output end is used to drive the window protection plate to open. The release assembly is located between the output end of the drive device and the window protection plate, and is used to separate the window protection plate from the output end of the drive device, so that the window protection plate can be closed under the action of a compression spring.

[0009] It also includes a control system, and the drive device and release assembly are both electrically connected to the control system.

[0010] Furthermore, the driving device includes a drive motor, a lead screw mounted on the frame via two lead screw mounting seats, a lead screw nut, and a nut fixing plate; the extension direction of the lead screw is parallel to the guide rod, and one end of the lead screw is connected to the output end of the drive motor; the nut fixing plate is fixedly connected to the lead screw nut, and the nut fixing plate is slidably connected to a common guide rail via fixing plate sliders respectively provided on both sides, thereby guiding the nut fixing plate; the release assembly is installed between the lead screw nut and the window protection plate.

[0011] Furthermore, the release assembly includes an electromagnet mounting base mounted on a lead screw nut, and a trigger electromagnet fixedly mounted on the side wall of the electromagnet mounting base; both ends of the iron core inside the trigger electromagnet protrude from the side wall of the trigger electromagnet; a boss is provided at the tail end of the iron core, and a spring sleeved on the iron core is provided between the boss and the side wall of the trigger electromagnet; a second release link is fixedly mounted at the front end of the iron core; the second release link is rotatably connected to one end of the first release link through a third release fixing shaft provided thereon; the other end of the first release link is rotatably connected to the second release fixing shaft; the electromagnet mounting base is also provided with a first release fixing shaft, on which a locking tongue is rotatably connected, and the second release fixing shaft is fixedly mounted on the locking tongue;

[0012] The release assembly also includes a wedge-shaped protective plate buckle disposed on the inner end of the window protective plate near the light-transmitting port, with the front end of the locking tongue corresponding to the rear end of the protective plate buckle, thereby enabling the window protective plate to be connected or disconnected from the output end of the drive device through the release assembly.

[0013] The initial state of the trigger electromagnet is de-energized, with release fixing shafts two and three positioned approximately on the same vertical line. When the trigger electromagnet is energized, a magnetic force is generated inside, attracting the iron core and pushing release linkage two outward. This causes release linkage one to move, retracting the latch. At this time, the spring is compressed, and this is the released state. When the trigger electromagnet is de-energized, the magnetic force inside disappears, and under the action of the spring force, the iron core returns to its initial position, pulling release linkage two and causing release linkage one to move. This raises the latch, and release fixing shafts two and three return to approximately the same vertical line, thus returning to the initial state.

[0014] When the release assembly moves past the protective plate latch under the drive of the lead screw nut, the inclined surface of the protective plate latch will press down the latch until the release assembly passes the protective plate latch, and the latch will lift up again, thereby connecting the window protective plate to the output end of the drive device through the release assembly;

[0015] Furthermore, the frame includes a wind tunnel connecting flange, a wind tunnel side fixing plate, a window side fixing plate, and a window connecting flange, all fixedly connected outwards from the wind tunnel observation window and each having a light-transmitting opening at a corresponding position. The window connecting flange is used to install the optical glass assembly for observation. There is a mounting cavity between the window side fixing plate and the wind tunnel side fixing plate, and the window protection plate is disposed in the mounting cavity. The two guide screws and the two common guide rails are all disposed at the inner edge of the window side fixing plate, and their extension direction is parallel to the edge of the window side fixing plate. The drive motor and the two lead screw mounting seats are all fixedly mounted on the window side fixing plate. The position of the window protection plate corresponds to the position of the light-transmitting opening on the wind tunnel connecting flange, and is used to protect the optical glass assembly.

[0016] Furthermore, the inner sidewall of the window side fixing plate is provided with multiple traction sleeve buffers. The positions of the traction sleeve buffers correspond to the traction sleeves and are used to provide buffering when the window protection plate is closed, so as to avoid collision damage between the traction sleeves and the window side fixing plate, or to prevent the traction sleeves from being ejected from the closed position due to collision.

[0017] Furthermore, guide strips are respectively provided on the left and right side walls of the second release link, and the extension direction of the guide strips is perpendicular to the extension direction of the iron core in the trigger electromagnet; the side wall of the electromagnet mounting base is provided with waist-shaped holes at the positions corresponding to the guide strips, and the ends of the two guide strips extend into the corresponding waist-shaped holes, thereby providing auxiliary guidance during the movement of the second release link.

[0018] Furthermore, the drive motor is a dual-output shaft motor, and the lead screw is connected to one of the output shafts of the drive motor; a manual wheel is provided on the other output shaft of the drive motor via a coupling, which is used to manually open the window protection plate during maintenance or in the event of a power outage.

[0019] Furthermore, a dustproof brush is provided between the edge of the light-transmitting opening and the window protection plate on the wind tunnel side fixing plate; the dustproof brush is fixedly installed on the wind tunnel side fixing plate and abuts against the side of the window protection plate, which is used to perform airflow interaction and dust filtration when the window protection plate is closed, so as to ensure the cleanliness of the air near the light-transmitting opening.

[0020] Furthermore, a nut fixing seat is provided on the lead screw nut, and the release assembly is mounted on the lead screw nut through the nut fixing seat.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] 1. This invention discloses a rapid-action wind tunnel observation window protection device. It designs a window protection component that uses a compression spring for power and a traction sleeve buffer for shock absorption to achieve rapid action. After the latch is unlocked, the window protection plate, pushed by the spring force of the compression spring, is guided by the protection plate slider and a common guide rail, and can spring back to the closed position within 0.3 seconds, achieving rapid protection of the optical glass components on the wind tunnel observation window. Simultaneously, the traction sleeve buffer performs a buffering operation when the window protection plate obstructs the window, effectively reducing the impact of the action on the frame. The spring limit seat can move on the guide rod, thereby adjusting the compression amount of the compression spring, facilitating disassembly and adjustment of the compression spring's force during maintenance.

[0023] 2. This invention provides a rapid-action wind tunnel observation window protection device, which incorporates a drive and release assembly that utilizes a lead screw and nut drive and unlocks near the dead zone of a connecting rod structure. During normal operation, the drive assembly is driven by a drive motor, with the lead screw and lead screw nut providing transmission. This drives the release assembly connected to the lead screw and nut towards the window protection assembly, causing the locking tongue to pass over the protection plate latch and connect the window protection plate to the output end of the drive device. The drive device then pulls the window protection plate to a designated position and stops, thus opening the window protection plate. Simultaneously, considering special emergency opening requirements and equipment maintenance needs, a manual wheel is added to the drive motor to retain manual operation functionality.

[0024] 3. The present invention provides a fast-acting wind tunnel observation window protection device, which is designed with a dust-filtering and air pressure balancing structure using a dustproof brush and a protective plate. During the closing process, airflow interaction and dust filtration are carried out to ensure the cleanliness of the air near the wind tunnel observation window. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of an embodiment of a wind tunnel observation window protection device according to the present invention;

[0026] Figure 2 for Figure 1 A schematic diagram of the AA-direction cross-section structure;

[0027] Figure 3 for Figure 1 Schematic diagram of the BB-direction cross-section structure;

[0028] Figure 4 for Figure 2 A magnified view of a portion of region I in the middle;

[0029] Figure 5 This is a horizontal cross-sectional view of the release component in an embodiment of a fast-acting wind tunnel observation window protection device of the present invention (the protective plate buckle is not shown).

[0030] Figure 6 This is a schematic diagram of the structure of the electromagnet mounting base, triggering electromagnet, and release linkage two of the release component in an embodiment of a fast-acting wind tunnel observation window protection device of the present invention.

[0031] Figure 7 This is a schematic diagram illustrating the interaction between the release component and the window protection plate in an embodiment of a fast-acting wind tunnel observation window protection device of the present invention.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1-Window protection assembly; 11-Window protection plate; 12-Traction sleeve; 13-Compression spring; 14-Guide rod; 15-Protection plate slider; 16-Traction sleeve buffer; 18-Protection plate buckle; 19-Spring limit seat;

[0034] 2-Drive and release assembly; 21-Nut fixing plate; 22-Lead screw nut; 23-Drive motor; 24-Coupling; 25-Manual wheel; 26-Lead screw; 27-Lead screw mounting base; 28-Electromagnet mounting base; 29-Trigger electromagnet; 210-Release fixing shaft one; 211-Lock tongue; 212-Release fixing shaft two; 213-Release linkage one; 214-Release fixing shaft three; 215-Release linkage two; 216-Fixed plate slider; 217-Nut fixing base;

[0035] 3-Common guide rail;

[0036] 4-Frame; 41-Wind tunnel connection flange; 42-Wind tunnel side mounting plate; 43-Window side mounting plate; 44-Window connection flange;

[0037] 5-Dustproof brush. Detailed Implementation

[0038] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0039] A fast-acting wind tunnel observation window protection device, the overall structure of which is as follows: Figure 1 , Figure 2 As shown, the system includes a frame 4, which consists of a wind tunnel connecting flange 41, a wind tunnel side fixing plate 42, a window side fixing plate 43, and a window connecting flange 44, all of which are fixedly connected outward from the wind tunnel observation window and have light-transmitting openings at corresponding positions. The window connecting flange 44 is used to install the optical glass assembly for observation. There is an installation cavity between the window side fixing plate 43 and the wind tunnel side fixing plate 42.

[0040] A window protection assembly 1 is installed inside the mounting cavity of the window side fixing plate 43, including two guide rods 14 parallel to the edge of the window side fixing plate 43, with the extension direction of each guide rod 14 parallel to the edge of the window side fixing plate 43; on the side of each guide rod 14 near the light-transmitting opening, from the outside to the inside, abutting traction sleeve 12, a compression spring 13, and a spring limiting seat 19 are installed in sequence, wherein the position of the spring limiting seat 19 can be adjusted arbitrarily to adjust the tension of the compression spring 13; a window protection plate 11 is fixedly installed on the side wall of the two traction sleeves 12, and the position of the window protection plate 11 corresponds to the position of the light-transmitting opening on the frame 4; the positional relationship of the guide rods 14, traction sleeves 12, and window protection plates 11 is as follows. Figure 3As shown; each of the traction sleeves 12 is provided with multiple traction sleeve buffers 16 between it and the inner sidewall of the window side fixing plate 43, which are used to provide cushioning when the window protection plate 11 is closed, to avoid collision damage between the traction sleeve 12 and the inner wall of the window side fixing plate 43, or to prevent it from being ejected from the closed position due to collision; a wedge-shaped protection plate buckle 18 is fixedly installed on the side of the window protection plate 11 near the light opening, and its shape is as follows Figure 4 As shown;

[0041] A drive and release assembly 2 is provided on one side of the window protection plate 11. The drive and release assembly 2 includes a drive device and a release assembly. The drive device includes a drive motor 23 fixedly connected to the window side fixing plate 43 and a lead screw 26 mounted on the window side fixing plate 43 via two lead screw mounting seats 27. One end of the lead screw 26 is connected to the output end of the drive motor 23. A lead screw nut 22 and a release assembly are provided on the lead screw 26 via a nut fixing seat 217.

[0042] The release assembly is located between the output end of the drive device and the window protection plate 11, and its structure is as follows: Figure 5 , Figure 6 As shown, it includes an electromagnet mounting base 28 and a trigger electromagnet 29 fixedly mounted on the side wall of the electromagnet mounting base 28; both ends of the iron core inside the trigger electromagnet 29 protrude from the side wall of the trigger electromagnet 29; a boss is provided at the tail end of the iron core, and a spring is provided between the boss and the side wall of the trigger electromagnet 29 and fitted on the iron core; a release link 215 is provided at the front end of the iron core; the release link 215 is rotatably connected to one end of the release link 213 through a release fixing shaft 214 provided thereon; the release link 213... The other end of 13 is rotatably connected to a second release fixing shaft 212; the electromagnet mounting base 28 is also provided with a first release fixing shaft 210, on which a locking tongue 211 is rotatably fitted, and the second release fixing shaft 212 is provided on the locking tongue 211; the release assembly also includes a wedge-shaped protective plate buckle 18 provided on the inner end of the window protection plate 11 near the light-transmitting opening, the front end of the locking tongue 211 corresponds to the tail end of the protective plate buckle 18, so that the window protection plate 11 can be connected or separated from the output end of the drive device through the release assembly;

[0043] Guide strips are provided on the left and right side walls of the release link 215, and the extension direction of the guide strips is perpendicular to the movement direction of the iron core in the trigger electromagnet 29; the side wall of the electromagnet mounting base 28 is provided with waist-shaped holes at the positions corresponding to the guide strips, and the ends of the two guide strips extend into the corresponding waist-shaped holes, so as to provide auxiliary guidance during the movement of the release link 215.

[0044] In addition, the drive motor 23 in this embodiment can be a dual-output shaft motor, with the lead screw 26 connected to one of the output shafts of the drive motor 23; a manual wheel 25 is provided on the other output shaft of the drive motor 23 via a coupling 24, which is used to manually open the window protection plate 11 during maintenance or in the event of a power outage.

[0045] Two common guide rails 3 are arranged parallel to each other on the inner side of the window side fixing plate 43. The extension direction of each common guide rail 3 is parallel to the extension direction of the guide rod 14. The window protection plate 11 is slidably connected to the common guide rails 3 through the protection plate sliders 15 provided at each corner, thereby providing auxiliary guidance for the window protection plate 11. The driving device of the drive and release assembly 2 also includes a nut fixing plate 21. The lead screw nut 22 is fixedly connected to the nut fixing plate 21 to prevent the release assembly provided on it from rotating with the lead screw 26 under the drive of the lead screw nut 22. The nut fixing plate 21 is slidably connected to the common guide rails 3 through multiple fixing plate sliders 216, thereby providing auxiliary guidance for the lead screw nut 22.

[0046] A dustproof brush 5 is provided between the edge of the light-transmitting opening on the wind tunnel side fixing plate 42 and the window protection plate 11. The dustproof brush 5 is fixedly installed on the wind tunnel side fixing plate 42 and abuts against the side of the window protection plate 11. It is used to perform airflow interaction and dust filtration when the window protection plate 11 is closed, so as to ensure the cleanliness of the air near the light-transmitting opening.

[0047] This embodiment also includes a control system, which is electrically connected to the drive motor 23 and the trigger electromagnet 29 respectively, to control the opening and release of the window protection plate.

[0048] The specific working process of this embodiment is as follows:

[0049] In the initial state, the positions of each component in this embodiment are as follows: Figure 2 As shown. When observation is required, the control system sends a signal to the drive motor 23, which drives the lead screw 26 to rotate. This rotation, via the lead screw nut 22 mounted on the lead screw, drives the release assembly mounted on the nut fixing seat 217 to move towards the window protection plate 11. When the release assembly passes the protection plate latch 18, the inclined surface of the protection plate latch 18 presses down the locking tongue 211 until the release assembly passes the protection plate latch 18. The locking tongue 211 then lifts up again, connecting the window protection plate 11 to the lead screw nut 22. At this time, the control system controls the drive motor 23 to reverse, driving the window protection plate 11 connected to the lead screw nut 22 to move until the drive motor 23 returns to its initial position. At this time, the compression springs 13 sleeved on the two guide rods 14 are compressed, and the experimenters can observe the experimental conditions inside the wind tunnel through the optical glass assembly mounted on the window connecting flange 44.

[0050] At the end of the experiment, the control system sends a signal to the trigger electromagnet 29, which is energized and generates a magnetic force to attract the iron core, pushing the release link 215 outward and driving the release link 213 to move, causing the locking tongue 211 to retract and releasing the window protection plate 11. Under the elastic force of the two compression springs 13, the window protection plate 11 can spring back to the closed position in only 0.3 seconds, and achieve effective closure under the buffer of multiple traction sleeve buffers 16, thus completing the rapid protection of the optical glass set in the wind tunnel observation window.

[0051] During the closing process, the dustproof brush 5 installed between the window protection plate 11 and the wind tunnel side fixing plate 42 can perform airflow interaction and dust filtration, thereby ensuring the cleanliness of the air near the light passage and further avoiding scratches and damage to the optical glass.

[0052] When this embodiment malfunctions or needs to operate under power failure, the screw 26 can be manually driven by rotating the manual wheel 25 to open the window protection plate 11 and perform equipment maintenance under power failure conditions, so as to ensure the normal operation of the present invention.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit them. For those skilled in the art, modifications can be made to the specific technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. However, these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions protected by the present invention.

Claims

1. A fast-acting wind tunnel observation window protection device, comprising a frame (4), wherein the frame (4) has a light-transmitting opening of a diameter adapted to the wind tunnel observation window at a position corresponding to the window; characterized in that: The frame (4) is equipped with a window protection assembly (1). The window protection assembly (1) includes two guide rods (14) arranged parallel to each other at the inner edge of the frame (4). Each guide rod (14) is equipped with a traction sleeve (12), a compression spring (13) and a spring limit seat (19) in sequence from the outside to the inside on the side near the light-transmitting opening. A window protection plate (11) is fixedly installed on the side wall of the two traction sleeves (12). The position of the window protection plate (11) corresponds to the position of the light-transmitting opening on the frame (4). The frame (4) is also provided with two parallel common guide rails (3), and the extension direction of each common guide rail (3) is parallel to the extension direction of the guide rod (14). The window protection plate (11) is slidably connected to the common guide rail (3) by at least one protection plate slider (15) respectively provided on both sides, thereby providing auxiliary guidance for the window protection plate (11). A drive and release assembly (2) for opening and closing is provided between the inner end of the window protection plate (11) and the frame (4). The drive and release assembly (2) includes a drive device and a release assembly. The drive device is connected to the frame (4), and its output end is used to drive the window protection plate (11) to open. The release assembly is provided between the output end of the drive device and the window protection plate (11) to separate the window protection plate (11) from the output end of the drive device and realize the closing of the window protection plate (11) under the action of the compression spring (13). It also includes a control system, and the drive device and release assembly are both electrically connected to the control system.

2. The wind tunnel observation window protection device according to claim 1, characterized in that: The driving device includes a drive motor (23), a lead screw (26) mounted on the frame (4) via two lead screw mounting seats (27), a lead screw nut (22), and a nut fixing plate (21); the extension direction of the lead screw (26) is parallel to the guide rod (14), and one end of it is connected to the output end of the drive motor (23); the nut fixing plate (21) is fixedly connected to the lead screw nut (22), and the nut fixing plate (21) is slidably connected to the common guide rail (3) via fixing plate sliders (216) respectively set on both sides, thereby guiding the nut fixing plate (21); the release assembly is installed between the lead screw nut (22) and the window protection plate (11).

3. The wind tunnel observation window protection device according to claim 1, characterized in that: The release assembly includes an electromagnet mounting base (28) mounted on a lead screw nut (22) and a trigger electromagnet (29) fixedly mounted on the side wall of the electromagnet mounting base (28); the two ends of the iron core inside the trigger electromagnet (29) protrude from the side wall of the trigger electromagnet (29); a boss is provided at the tail end of the iron core, and a spring sleeved on the iron core is provided between the boss and the side wall of the trigger electromagnet (29); a second release link (215) is fixedly mounted at the front end of the iron core; the second release link (215) is rotatably connected to one end of the first release link (213) through a third release fixing shaft (214) provided thereon; the other end of the first release link (213) is rotatably connected to the second release fixing shaft (212); a first release fixing shaft (210) is also provided on the electromagnet mounting base (28), and a locking tongue (211) is rotatably connected thereon, and the second release fixing shaft (212) is fixedly mounted on the locking tongue (211); The release assembly also includes a wedge-shaped protective plate buckle (18) disposed on the inner end of the window protective plate (11) near the light-transmitting port. The front end of the locking tongue (211) corresponds to the tail end of the protective plate buckle (18), so that the window protective plate (11) can be connected or separated from the output end of the drive device through the release assembly.

4. A fast-acting wind tunnel observation window protection device according to any one of claims 1-3, characterized in that: The frame (4) includes a wind tunnel connecting flange (41), a wind tunnel side fixing plate (42), a window side fixing plate (43), and a window connecting flange (44), which are fixedly connected outward from the wind tunnel observation window and have light-transmitting openings at corresponding positions. The window connecting flange (44) is used to install the optical glass assembly for observation. There is an installation cavity between the window side fixing plate (43) and the wind tunnel side fixing plate (42), and the window protection plate (11) is set in the installation cavity. The two guide screws (14) and the two common guide rails (3) are all set at the inner edge of the window side fixing plate (43), and their extension directions are parallel to the edge of the window side fixing plate (43). The drive motor (23) and the two lead screw mounting seats (27) are all fixedly installed on the window side fixing plate (43). The position of the window protection plate (11) corresponds to the position of the light-transmitting opening on the wind tunnel connecting flange (41) and is used to protect the optical glass assembly.

5. A fast-acting wind tunnel observation window protection device according to claim 4, characterized in that: The inner sidewall of the window side fixing plate (43) is provided with a plurality of traction sleeve buffers (16), the positions of which correspond to the traction sleeves (12) and are used to provide buffering when the window protection plate (11) is closed.

6. A fast-acting wind tunnel observation window protection device according to claim 3, characterized in that: The left and right sidewalls of the second release link (215) are respectively provided with guide strips, and the extension direction of the guide strips is perpendicular to the extension direction of the iron core in the trigger electromagnet (29); the sidewall of the electromagnet mounting base (28) is provided with waist-shaped holes at the positions corresponding to the guide strips, and the ends of the two guide strips extend into the corresponding waist-shaped holes, so as to provide auxiliary guidance during the movement of the second release link (215).

7. A fast-acting wind tunnel observation window protection device according to claim 2, characterized in that: The drive motor (23) is a dual-output shaft motor. The lead screw (26) is connected to one of the output shafts of the drive motor (23). A manual wheel (25) is provided on the other output shaft of the drive motor (23) via a coupling (24) for manually opening the window protection plate (11) during maintenance or power failure.

8. A fast-acting wind tunnel observation window protection device according to claim 7, characterized in that: A dustproof brush (5) is provided between the edge of the light-transmitting port on the wind tunnel side fixing plate (42) and the window protection plate (11). The dustproof brush (5) is fixedly installed on the wind tunnel side fixing plate (42) and abuts against the side of the window protection plate (11). It is used to perform airflow interaction and dust filtration when the window protection plate (11) is closed, so as to ensure the cleanliness of the air near the light-transmitting port.

9. A fast-acting wind tunnel observation window protection device according to claim 2, characterized in that: The lead screw nut (22) is provided with a nut fixing seat (217), and the release assembly is set on the lead screw nut (22) through the nut fixing seat (217).

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