Plateau flight oil-driven unmanned aerial vehicle air filter box

Abstract

An air filter box of a plateau flying oil-driven unmanned aerial vehicle comprises a cavity, an air outlet connected with air inlet of an engine is formed in the cavity, an air filter element is installed in the cavity, air inlet of the air filter element is communicated with the atmosphere, an air path which does not pass through the air filter element and is communicated with the air outlet is arranged in the cavity, and an opening of the air path is located in the wall of the cavity. An opening and closing plate valve is installed on an opening of the air channel and connected with a driving mechanism. By adopting the air filter box, the engine power of the oil-driven unmanned aerial vehicle can play a positive role.

Description

Technical Field

[0001] The utility model relates to an oil-powered unmanned aerial vehicle, in particular to an air filter box on an air intake system of the unmanned aerial vehicle, and belongs to the technical field of unmanned aerial vehicles. Background Art

[0002] A prominent negative impact of using oil-powered drones in plateau scenarios is the problem of oxygen required for combustion. The atmospheric pressure and oxygen content in the plateau are lower than those in the plains. Moreover, the higher the altitude, the lower the atmospheric pressure, the lower the oxygen partial pressure in the atmosphere, and the less oxygen content. Compared with low-altitude areas in the plains, the engine power of the same oil-powered drone will be reduced when flying in the plateau, and the corresponding load will also be reduced. Therefore, how to ensure sufficient air intake for oil-powered drones in plateau areas is a problem that needs to be studied. In the air intake system of oil-powered drones, in order to prevent dust from entering the combustion system of the engine, an air filter is configured on the intake pipeline to filter out the dust in the intake air. However, the air filter will also form intake resistance while filtering, which will have a negative impact on the engine air supply. After flight tests and investigations, it was found that in fact, during plateau flight, there is some dust at a height close to the ground, which must be filtered out, otherwise it will affect the operation of the engine. However, after flying to a certain altitude, the air is basically free of dust. At this time, the filtering function of the air filter is no longer needed, but the intake resistance caused by the air filter still exists. If the intake resistance can be eliminated, it can have a positive impact on the power of the engine. Summary of the invention

[0003] The utility model aims to provide an air filter box for a high-altitude flying oil-powered UAV, which can play a positive role in the engine power of the oil-powered UAV.

[0004] In order to achieve the purpose of the utility model, the following technical scheme is adopted: an air filter box for a high-altitude flying oil-powered UAV, including a cavity, the cavity has an air outlet connected to the engine air intake, an air filter element is installed in the cavity, the air intake of the air filter element is connected to the atmosphere, the cavity has an air path connected to the air outlet without passing through the air filter element, the opening of the air path is located on the cavity wall, an opening and closing plate valve is installed on the opening of the air path, and the opening and closing plate valve is connected to a driving mechanism.

[0005] Furthermore; the opening and closing plate valve includes multiple valve plates, each valve plate is fixedly connected to a corresponding crank, each crank is rotatably connected to the air filter box on the opening side of the air path, the end of each crank is hinged on the first connecting rod, one end of the second connecting rod is hinged on the first connecting rod, and the other end is hinged on the driving arm, and the driving arm is fixedly connected to the output shaft of the servo gear.

[0006] Furthermore, the cavity in the air filter box is composed of two layers, one layer is equipped with an air filter element, and the other layer is an air path.

[0007] The positive and beneficial technical effect of the utility model is that the use of the air filter box can have a positive effect on the engine power of the oil-powered UAV. Since the valve plate can be opened after the oil-powered UAV flies to a high altitude, air can enter the engine without passing through the air filter element, which effectively reduces the intake resistance. After testing, taking a oil-powered UAV with a maximum load of 50kg as an example, the maximum load can be increased by about 10% after adopting the technical solution of the air filter box. BRIEF DESCRIPTION OF THE DRAWINGS

[0008] Figure 1 It is an overall schematic diagram of the utility model.

[0009] Figure 2 It is a cross-sectional schematic diagram of the utility model.

[0010] Figure 3 It is a schematic diagram of an embodiment of an opening and closing valve plate driving mechanism.

[0011] Figure 4 This is a schematic diagram of a valve plate. DETAILED DESCRIPTION

[0012] In order to more fully explain the implementation of the utility model, implementation examples of the utility model are provided. These implementation examples are only for the purpose of illustrating the utility model and do not limit the scope of the utility model.

[0013] The utility model is further explained in detail in conjunction with the accompanying drawings, in which the marks are: 1: air filter box; 2: valve plate; 3: air outlet; 4: air filter element; 5: air path; 6: supporting isolation plate; 7: crank; 8: first connecting rod; 9: second connecting rod; 10: driving arm; 11: steering gear; 12: rotating shaft between crank and air filter box; 13: hinged shaft between crank and first connecting rod.

[0014] As shown in the attached drawings, an air filter box for a highland flying oil-powered UAV, 1 shows an air filter box, including a cavity, the cavity has an outlet 3 connected to the engine air intake, an air filter element 4 is installed in the cavity, the air intake of the air filter element is connected to the atmosphere, the cavity has an air path 5 that communicates with the air outlet without passing through the air filter element, the opening of the air path is located on the cavity wall, an opening and closing plate valve is installed on the opening of the air path, and the opening and closing plate valve is connected to a driving mechanism. In this embodiment, the cavity in the air filter box is composed of two layers, one layer is equipped with an air filter element 4, and the other layer is an air path, both layers are connected to the air outlet, and a supporting isolation plate 6 is installed between the two layers, and the supporting isolation plate separates the two layers near the air intake end, which can prevent poor filtration from entering the air path through the air filter element when the air is taken in from the air filter element during ground flight. Due to the supporting isolation plate, the filter element must enter the air path after the length of the supporting isolation plate. This ensures the filtering effect when the filter element is used for air intake.

[0015] In this embodiment, the opening and closing plate valve comprises a plurality of valve plates 2, each valve plate is fixedly connected to a corresponding crank 7, each crank is rotatably connected to the air filter box on the opening side of the gas path, 12 is a rotating shaft between the crank and the air filter box, the ends of each crank are hinged to the first connecting rod 8, one end of the second connecting rod 9 is hinged to the first connecting rod 8, and the other end is hinged to the driving arm 10, and the driving arm 10 is fixedly connected to the output shaft of the steering gear 11. The steering gear is connected to the controller for control, and the steering gear is used because the steering gear is a mature and reliable component used in drones, and the control is simple.

[0016] In addition to the above-mentioned opening and closing drive mechanism, an electric gate valve can also be directly installed on the opening of the gas path to realize the opening and closing of the valve plate.

[0017] The air outlet of the air filter box is connected to the air supply pipeline of the engine. When in use, the valve plate is closed when flying on the ground or at low altitude, and air enters through the air filter element. When flying at high altitude, the valve plate is opened. Because the filter element has resistance, air will enter from the air path cavity, reducing the intake resistance.

[0018] After describing the implementation mode of the utility model in detail, people familiar with the technology can clearly understand that various changes and modifications can be made without departing from the scope and spirit of the above-mentioned patent application. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the utility model are within the scope of the technical solution of the utility model, and the utility model is not limited to the implementation mode of the examples given in the specification.

Claims

1. An air filter box for a high-altitude oil-powered UAV, comprising a cavity, an air outlet connected to the engine air intake, an air filter element installed in the cavity, and the air intake of the air filter element connected to the atmosphere, characterized in that: The cavity is provided with an air path communicating with the air outlet without passing through the air filter element, the opening of the air path is located on the cavity wall, an opening and closing plate valve is installed on the opening of the air path, and the opening and closing plate valve is connected to a driving mechanism.

2. The air filter box for oil-powered UAV for high altitude flight according to claim 1 is characterized by: The opening and closing plate valve includes multiple valve plates, each valve plate is fixedly connected to a corresponding crank, each crank is rotatably connected to the air filter box on the opening side of the air path, the end of each crank is hinged on the first connecting rod, one end of the second connecting rod is hinged on the first connecting rod, and the other end is hinged on the driving arm, and the driving arm is fixedly connected to the output shaft of the servo.

3. The air filter box for oil-powered UAV for high altitude flight according to claim 1 is characterized by: The cavity in the air filter box is composed of two layers, one layer is provided with an air filter element, and the other layer is an air path.

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