Dustproof net for stamping air inlet of Boeing 787 airplane

Abstract

The utility model discloses a Boeing 787 aircraft stamping air inlet dust screen, which comprises a pipe body, a separation net, two end part clamping heads, a back part clamping seat, a hand wheel and a transmission mechanism, the two end part clamping heads are respectively arranged at the two ends of the pipe body in a sliding manner, the sliding direction of the end part clamping heads is the length direction of the pipe body, the hand wheel is rotatably arranged in the middle of the pipe body, and the transmission mechanism is arranged on the back part clamping seat. The transmission mechanism is connected with the hand wheel and the two end chucks, the two end chucks can be driven to extend out and retract in a sliding mode at the same time by rotating the hand wheel, one side of the separation net is fixedly connected with the front face of the pipe body, the back clamping base is fixed to the back face of the pipe body, and bayonets are formed in the end chucks and the back clamping base respectively. The utility model has the advantages of simple operation and lighter weight.

Description

Technical Field

[0001] The utility model relates to the technical field of dust prevention of aircraft ram air inlets, in particular to a dust prevention net for the ram air inlet of a Boeing 787 aircraft. Background Art

[0002] There are two ram air inlets on the left and right sides of the wing root of the Boeing 787 aircraft. The upper ram air inlet is the same as that of traditional aircraft and is used for internal cooling of the aircraft air conditioning system. The lower ram air inlet is equipped with an air intake deflector door and is the air intake of the CAC air compressor.

[0003] When the aircraft is parked, once the system where the ram air inlet is located is powered on, the system's ram fan will rotate at high speed. Especially in the north, if a dust net is not installed in the ram air inlet area, a large amount of poplar catkins, willow catkins and sand will be inhaled, causing the aircraft air conditioning heat exchanger and the PECS power electronic equipment cooling system heat exchanger to be blocked, losing the component's heat dissipation function, and then causing failure of related systems, seriously affecting the operation of the B787 fleet.

[0004] However, the existing Boeing-designed ram air inlet dust screens are surrounded by a metal frame and have a central connecting steel plate. These are bulky and heavy, with long order times and require multiple people to install, making them inconvenient to use. This has led to a shortage of dust screen tools, as well as difficulties storing and using them, for major airlines and maintenance companies during maintenance. Utility Model Content

[0005] The utility model aims to provide a dustproof net for the ram air inlet of a Boeing 787 aircraft, which is easy to operate and lighter in weight.

[0006] The purpose of this utility model is achieved through the following technical solutions:

[0007] A dust screen for the ram air inlet of a Boeing 787 aircraft is characterized by comprising a tube body, a partition net, two end clamps, a back clamping seat, a hand wheel and a transmission mechanism. The two end clamps are respectively slidably arranged at the two ends of the tube body, and the sliding direction of the end clamps is along the length direction of the tube body. The hand wheel is rotatably installed in the middle of the tube body. The transmission mechanism connects the hand wheel and the two end clamps. By rotating the hand wheel, the two end clamps can be driven to slide out and retract simultaneously. One side of the partition net is fixedly connected to the front of the tube body. The back clamping seat is fixed to the back of the tube body. The end clamps and the back clamping seat are respectively provided with a bayonet.

[0008] A further technical solution of the utility model is as follows: the transmission mechanism includes a transmission shaft, a first bevel gear, two second bevel gears, two screw rods and two nuts. The transmission shaft is rotatably arranged in the middle of the tube body, the handwheel is fixedly mounted on the outer end of the transmission shaft, the first bevel gear is fixedly mounted on the inner end of the transmission shaft, the two nuts are respectively arranged at the ends of the end clamps extending into the tube body, the two screw rods are rotatably arranged inside the tube body, the two second bevel gears are respectively fixedly mounted on the ends of the two screw rods close to the transmission shaft, the first bevel gear is meshed with the second bevel gear, and the end of the screw rod away from the transmission shaft is threadedly connected to the nut.

[0009] A further technical solution of the utility model is: a fixing seat is fixed in the middle of the tube body, the fixing seat is embedded in the tube body, the transmission shaft is rotatably mounted on the fixing seat through a bearing, the end of the screw rod close to the transmission shaft is rotatably mounted on the fixing seat through a bearing, and the first bevel gear and the second bevel gear are both located in the fixing seat.

[0010] A further technical solution of the utility model is that a slider is provided on the end clamp, the slider is inserted into the end of the pipe body, and the nut is provided on the slider.

[0011] A further technical solution of the utility model is that the partition screen comprises a filter screen and a spring steel outer frame arranged around the filter screen.

[0012] A further technical solution of the utility model is that the spring steel outer frame is wrapped with an edge strip.

[0013] A further technical solution of the present invention is that the dust-proof net of the stamped air inlet further comprises a warning ribbon, and one end of the warning ribbon is connected to the tube body.

[0014] A further technical solution of the utility model is that a snap button is provided on the warning ribbon.

[0015] A further technical solution of the present invention is that a handle is provided on the tube body.

[0016] A further technical solution of the utility model is that a metal ring is provided at one end of the warning ribbon, and the metal ring is sleeved on the handle.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] The utility model fixes the dust screen of the ram air inlet through the cooperation of the back clamp and the end clamp. During the fixing process, the fixing action can be completed by turning the hand wheel to make the end clamp extend outward, which is simple to operate. In addition, the utility model does not need to set up a metal frame or other connecting structure, so the weight can be made lighter, more convenient to use, and the volume can be made smaller accordingly. It can be seen that the utility model can not only prevent the aircraft from inhaling debris such as poplar catkins, willow catkins, sand and dust during parking, but also is light to use and simple to operate, which greatly improves the efficiency of aircraft maintenance work and ensures the operation of the B787 fleet. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a three-dimensional schematic diagram of a ram air inlet dust screen according to an embodiment of the present invention;

[0020] Figure 2 This is a schematic front view of the ram air inlet dust screen of the embodiment of the utility model after the warning ribbon is removed;

[0021] Figure 3 yes Figure 2 Schematic cross-sectional view at AA in the middle;

[0022] Figure 4 yes Figure 3 A magnified schematic diagram of point B in the middle;

[0023] Figure 5 This is a side view of the ram air inlet dust screen after the warning ribbon is removed from the embodiment of the utility model;

[0024] Figure 6 This is a schematic diagram of the front structure of the warning ribbon of an embodiment of the utility model;

[0025] Figure 7 It is a schematic diagram of the back structure of the warning ribbon of an embodiment of the utility model.

[0026] Meaning of the reference numerals in the figure:

[0027] 1-tube body; 2-partition net; 3-warning streamer; 4-handle; 5-end clamp; 6-bayonet; 7-warning slogan; 8-handwheel; 9-fixing seat; 10-filter screen; 11-edging strip; 12-spring steel outer frame; 13-slider; 14-nut; 15-screw; 16-bearing; 17-second bevel gear; 18-first bevel gear; 19-drive shaft; 20-back clamp; 21-metal ring; 22-velcro; 23-waterproof cloth strip; 24-snap buckle. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the embodiments.

[0029] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0030] In the description of this utility model, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and is not to be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0031] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0032] Example:

[0033] like Figures 1 to 7 The illustration shows a Boeing 787 ram air inlet dust screen of this embodiment. It comprises a tube body 1, a screen 2, two end clamps 5, a back clamp 20, a handwheel 8, a transmission mechanism, and a warning ribbon 3. The transmission mechanism comprises a drive shaft 19, a first bevel gear 18, two second bevel gears 17, two screws 15, and two nuts 14. The transmission mechanism components are precision-machined from stainless steel. The ram air inlet dust screen of this embodiment has a stable overall structure, and each component can be independently disassembled, facilitating routine maintenance and installation.

[0034] The tube body 1 of this embodiment is in the shape of an elongated square tube, with two end clamps 5 slidably mounted on each end of the tube body. Specifically, the end clamps 5 are provided with sliders 13, the shape of which matches the shape of the central hole of the tube body 1. The sliders 13 fit within the ends of the tube body 1 and can slide along the ends of the tube body 1. Nuts 14 are mounted on the sliders 13.

[0035] A fixed base 9 is fixed in the middle of the tubular body 1 and embedded within the tubular body 1. A transmission shaft 19 is rotatably mounted on the fixed base 9 via a bearing 16. A handwheel 8 is fixedly mounted on the end of the transmission shaft 19 that extends outside the fixed base 9, positioning the handwheel 8 externally. Handwheel 8 is constructed from aviation aluminum alloy with a knurled and anodized outer surface. The overall design is ergonomic and ensures easy and reliable operation. A first bevel gear 18 is fixedly mounted on the other end of the transmission shaft 19 that extends into the fixed base 9, positioning the first bevel gear 18 internally.

[0036] Two screw rods 15 are respectively rotatably arranged inside the tube body 1, as shown in FIG. Figure 3 and Figure 4 As shown, the end of the screw rod 15 close to the transmission shaft 19 is rotatably mounted on the fixed seat 9 through the bearing 16, the second bevel gear 17 is fixedly mounted on the end of the screw rod 15 extending into the fixed seat 9, the second bevel gear 17 is located in the fixed seat 9, the first bevel gear 18 is meshed with the second bevel gear 19, and the end of the screw rod 15 away from the transmission shaft 19 is threadedly connected to the nut 14.

[0037] When the hand wheel 8 is turned, the first bevel gear 18 is driven to rotate via the transmission shaft 19, which in turn drives the second bevel gear 17 and the screw 15 to rotate. Through the cooperation between the screw 15 and the nut 14, the two end clamps 5 are driven to slide out and retract. In this embodiment, the screw 15 is a trapezoidal screw and the nut 14 is a trapezoidal nut.

[0038] The screen 2 of this embodiment includes a filter 10 and a spring steel outer frame 12 arranged around the filter 10. The filter 10 is formed by laser cutting of stainless steel, and the spring steel outer frame 12 is formed by bending spring steel sheet metal. The spring steel outer frame 12 and the filter 10 are welded together using a laser welding process, and the spring steel outer frame 12 is wrapped with a edging strip 11. One side of the screen 2 is fixedly connected to the front of the tube body 1 by screws. When in use, the screen 2 covers the outside of the stamping air inlet. Figure 5 As shown, the partition net 2 of this embodiment is set at an angle, and when fixed at the stamping air inlet, it can be pressed more tightly against the outside of the stamping air inlet.

[0039] The back holder 20 is a long strip fixed to the back of the tube body 1. The end clamp 5 and the back holder 20 are each provided with a bayonet 6. The bayonet 6 on the back holder 20 is semicircular, while the bayonet 6 on the end clamp 5 is quarter-circular. The bayonet 6 is used to snap onto the frame outside the ram air inlet.

[0040] The end clamp 5 and the back clamp 20 of this embodiment are made of engineering plastics, and a 3D scanner is used to collect data on the installation position, and the aircraft's external dimensions are restored 1:1. The end clamp 5 and the back clamp 20 are precisely machined to fit the aircraft's installation surface. The end clamp 5 and the back clamp 20 can fit well in the installation, and a layer of non-slip elastic rubber pad is pasted on the surface of the clamp 6 where they contact the aircraft body to ensure that the dust net can be firmly installed on the aircraft and will not fall off, greatly reducing the safety risk of tool use.

[0041] In this embodiment, handles 4 are provided on both sides of the upper side of the tube body 1 .

[0042] like Figure 6 and Figure 7 As shown, the warning ribbon 3 comprises a waterproof fabric strip 23, Velcro 22, snap fasteners 24, and a metal ring 21. The surface of the waterproof fabric strip 23 is marked with the corresponding warning slogan 7, and reflective tape is sewn onto the back of the waterproof fabric strip 23. One end of the waterproof fabric strip 23 is connected to the metal ring 21 via Velcro 22. The metal ring 21 is then attached to the handle 4. The snap fastener 24 is located near the other end of the waterproof fabric strip 23. During use, the warning ribbon 3, which is attached to the dust screens mounted on the ram air intakes on both sides of the aircraft, can be looped under the aircraft and fastened together using the snap fasteners 24. This prevents the warning ribbon 3 from being blown away by the wind and blocking air intake, while also providing a clear warning effect.

[0043] When installing the ram air inlet dust screen of this embodiment, first, the snap-on openings 6 on the back snap-on holder 20 are correspondingly snapped onto the frame on the side outside the ram air inlet, and the screen 2 is covered on the outside of the ram air inlet. Then, the hand wheel 8 is rotated so that the two end snap-ons 5 extend upward and downward respectively. Finally, the snap-on openings 6 of the end snap-on heads 5 are correspondingly snapped onto the upper and lower frames outside the ram air inlet, completing the fixed installation of the ram air inlet dust screen. After completing the installation of the ram air inlet dust screen on the ram air inlet on both sides of the aircraft, the warning ribbons 3 on both sides are wrapped around the bottom of the aircraft and fastened together with the snap-on buckles 24.

[0044] The above embodiments of the present invention are not intended to limit the scope of protection of the present invention, and the implementation methods of the present invention are not limited thereto. All other modifications, replacements or changes made to the above structure of the present invention based on the above contents of the present invention, in accordance with common technical knowledge and customary means in this field, without departing from the above basic technical ideas of the present invention, should fall within the scope of protection of the present invention.

Claims

1. A Boeing 787 aircraft ram air inlet dust screen, characterized by: It includes a tube body, a partition net, two end clamps, a back clamping seat, a handwheel and a transmission mechanism. The two end clamps are respectively slidably arranged at the two ends of the tube body, and the sliding direction of the end clamps is along the length direction of the tube body. The handwheel is rotatably installed in the middle part of the tube body. The transmission mechanism connects the handwheel and the two end clamps. By rotating the handwheel, the two end clamps can be driven to slide out and retract at the same time. One side of the partition net is fixedly connected to the front of the tube body, and the back clamping seat is fixed on the back of the tube body. The end clamps and the back clamping seat are respectively provided with bayonet holes.

2. The Boeing 787 aircraft ram air inlet dust screen according to claim 1, characterized in that: The transmission mechanism includes a transmission shaft, a first bevel gear, two second bevel gears, two screw rods and two nuts. The transmission shaft is rotatably arranged in the middle of the tube body, the handwheel is fixedly mounted on the outer end of the transmission shaft, the first bevel gear is fixedly mounted on the inner end of the transmission shaft, the two nuts are respectively arranged at the ends of the end clamps extending into the tube body, the two screw rods are rotatably arranged inside the tube body, the two second bevel gears are respectively fixedly mounted on the ends of the two screw rods close to the transmission shaft, the first bevel gear is meshed with the second bevel gear, and the end of the screw rod away from the transmission shaft is threadedly connected to the nut.

3. The Boeing 787 aircraft ram air inlet dust screen according to claim 2, characterized in that: A fixing seat is fixed in the middle of the tube body, and the fixing seat is embedded in the tube body. The transmission shaft is rotatably mounted on the fixing seat through a bearing. The end of the screw rod close to the transmission shaft is rotatably mounted on the fixing seat through a bearing. The first bevel gear and the second bevel gear are both located in the fixing seat.

4. The Boeing 787 aircraft ram air inlet dust screen according to claim 2, characterized in that: The end clamp is provided with a slider, the slider is inserted into the end of the tube body, and the nut is provided on the slider.

5. The Boeing 787 aircraft ram air inlet dust screen according to claim 1, characterized in that: The partition screen comprises a filter screen and a spring steel outer frame arranged around the filter screen.

6. The Boeing 787 aircraft ram air inlet dust screen according to claim 5, characterized in that: The spring steel outer frame is wrapped with an edge strip.

7. The Boeing 787 aircraft ram air inlet dust screen according to claim 1, characterized in that: The ram air inlet dustproof net also includes a warning ribbon, one end of which is connected to the tube body.

8. The Boeing 787 aircraft ram air inlet dust screen according to claim 7, characterized in that: The warning ribbon is provided with a snap buckle.

9. The Boeing 787 aircraft ram air inlet dust screen according to claim 7, characterized in that: A handle is provided on the tube body.

10. The Boeing 787 aircraft ram air inlet dust screen according to claim 9, characterized in that: One end of the warning ribbon is provided with a metal ring, and the metal ring is sleeved on the handle.

Images