Efficient overflow air inlet channel structure

Abstract

The utility model discloses an efficient overflow air inlet channel structure which comprises an air inlet channel body, a drainage part protruding outwards is arranged on the side wall of the air inlet channel body, an overflow hole is formed in the drainage part, and the overflow hole is communicated with the interior of the air inlet channel body. The overflow hole is obliquely formed, and the included angle between the axis of the overflow hole and the axis of the air inlet channel in the direction of the air inlet is an obtuse angle. According to the technical scheme, the drainage part which is integrally formed and protrudes outwards is arranged on the side wall of the air inlet channel body, the overflow hole which penetrates through and is communicated with the interior of the air inlet channel is formed in the drainage part, and the overflow hole is inclined; specifically, the axis of the overflow hole and the axis of the air inlet channel form an included angle with an obtuse angle in the direction of the air inlet, so that air can smoothly overflow into the overflow hole when flowing through the included angle; due to the existence of the drainage part, the overflow hole has a certain length, the air overflow effect is better, and more air can be overflowed into the mounting cabin of the unmanned aerial vehicle.

Description

Technical Field

[0001] The utility model belongs to the technical field of unmanned aerial vehicles, and in particular relates to a high-efficiency overflow air inlet structure. Background Art

[0002] Drones are currently being equipped with an increasing number of devices in pursuit of high performance and expanded functionality. Since drones are also required to have a long range, the larger space in the middle of the fuselage is largely reserved for the fuel tank. Therefore, the engine bay must have space for other equipment besides the powertrain. The engine itself generates considerable heat during operation, and some equipment is high-precision and temperature-sensitive, necessitating air bleed from the engine bay to dissipate heat. The air intake is directly connected to the engine, typically with an overflow port. While the air supply to the engine is sufficient, excess air is diverted to the engine bay, thereby reducing the temperature inside and minimizing the impact on the precision equipment.

[0003] The first overflow port is a hole drilled directly into the normal direction of the straight section of the intake duct near the engine. However, its orientation is perpendicular to the airflow, resulting in lower heat dissipation efficiency. Another method involves drilling an oblique hole into the intake duct and attaching a flange (typically requiring additional molding or 3D printing) to the duct to guide the flow. While this method improves air flow efficiency, it requires an additional gluing step and takes a long time to cure, impacting assembly efficiency. Utility Model Content

[0004] In order to solve the technical problem of low air overflow efficiency of overflow holes on the air intake duct in the background technology, the purpose of the present utility model is to provide a high-efficiency overflow air intake duct structure that can solve the above problem.

[0005] The technical solution for achieving the purpose of the utility model is: a high-efficiency overflow inlet duct structure, including an inlet duct body, a drainage portion protruding outward on the side wall of the inlet duct body, an overflow hole in the drainage portion, and the overflow hole is connected to the interior of the inlet duct body; the overflow hole is arranged at an angle, and the angle between the axis of the overflow hole and the axis of the inlet duct in the direction of the air inlet is an obtuse angle.

[0006] In this technical solution, the sidewall of the air inlet body has an integrally formed, outwardly protruding drainage portion. An overflow hole is provided within the drainage portion, extending through the portion and connected to the air inlet. The overflow hole is inclined, specifically, the axis of the overflow hole and the axis of the air inlet form an obtuse angle in the direction of the air inlet. This allows air to smoothly overflow into the overflow hole as it passes through. Furthermore, due to the presence of the drainage portion, the overflow hole has a certain length, resulting in a better air overflow effect, allowing more air to overflow into the drone's installation cabin. The drainage portion in this solution is integrally formed with the air inlet, eliminating the need for additional gluing and other steps for the drainage portion, improving work efficiency. After integral molding, only a single oblique hole needs to be drilled.

[0007] Furthermore, the angle is greater than 120° and less than 150°. If the angle between the obliquely arranged overflow hole and the air inlet duct is too large or too small, it will affect the air overflow efficiency. After continuous testing, the angle formed by the axis of the overflow hole and the axis of the air inlet duct in the direction of the air inlet is greater than 120° and less than 150°, which is the optimal range. The air in the air inlet duct overflows into the overflow hole with the highest efficiency.

[0008] Furthermore, the drainage portion is made of prepreg and is integrally formed with the air intake duct body. A sandwich structure is provided within the drainage portion, which contains filler. Both the air intake duct and the drainage portion are made of prepreg. During initial installation, a base layer is laid on the outer wall of the air intake duct to form an outwardly protruding drainage portion. During installation, a sandwich layer can be placed at the location of the drainage portion, and the sandwich layer can be filled with other materials to facilitate the formation of the outwardly protruding drainage portion, thereby reducing the amount of prepreg required for the drainage portion.

[0009] Furthermore, the filler is foam, which is light in material. After the drainage portion is formed, the local load is not large. The foam is lighter than the prepreg material because the local thickening will reduce the weight. The use of the air intake or even the drone will not be affected by the increase in local load weight.

[0010] Furthermore, the inner wall of the overflow hole is coated with glue. Since the foam material has pores, it will disperse the overflowing air and disrupt the flow of air. The overflow hole coated and hardened with glue has better transmission effect and higher efficiency when air overflows.

[0011] By adopting the above technical solution, the utility model has the following beneficial effects:

[0012] (1) An overflow hole is obliquely provided on the outer wall of the air inlet duct, and a drainage portion is added that is integrally formed with the air inlet duct and protrudes outward. The overflow hole penetrates the drainage portion and has a certain length. When air flows through this portion, the oblique overflow hole with a certain length has a better effect on air overflow and higher efficiency.

[0013] (2) The angle between the overflow hole and the air inlet is further limited to be greater than 120° and less than 150° to achieve the best overflow effect;

[0014] (3) A light-weight foam layer is provided inside the drainage section, which reduces the load on the drainage section of the local outer wall of the air inlet, reduces the weight of the entire air inlet, minimizes the impact on the UAV, and also improves the efficiency of the locally formed drainage section.

[0015] (4) The inner wall of the overflow hole in the foam material is coated with glue and dried to prevent the gap in the foam material from affecting air transmission and being easily damaged. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the content of the present invention easier to understand, the present invention is further described in detail below based on specific embodiments and in conjunction with the accompanying drawings, wherein

[0017] Figure 1 This is a schematic structural diagram of the air inlet and drainage portion of the present invention;

[0018] Figure 2 This is a cross-sectional structural diagram of the intake duct overflow structure in the utility model;

[0019] Figure 3 This is a top view of the overflow hole on the air intake duct in the utility model.

[0020] The numbers in the accompanying drawings are: 1 air inlet body; 2 drainage part; 3 overflow hole; 4 air inlet; A axis of the overflow hole; B axis of the air inlet; β angle between the axis of the overflow hole and the axis of the air inlet in the direction of the air inlet. DETAILED DESCRIPTION

[0021] Example:

[0022] like Figure 1-Figure 3As shown, this embodiment provides a high-efficiency overflow inlet duct structure, including an inlet duct body 1, wherein the side wall of the inlet duct body 1 has a guide portion 2 protruding outward, and the guide portion 2 has an overflow hole 3, and the overflow hole 3 is connected to the interior of the inlet duct body 1; the overflow hole 3 is arranged at an angle, and the angle β between the axis A of the overflow hole and the axis B of the inlet duct in the direction of the air inlet port 4 is an obtuse angle. In this technical solution, the sidewall of the air inlet body 1 has an integrally formed, outwardly protruding drainage portion 2. An overflow hole 3 is provided within the drainage portion 2, extending therethrough and connected to the air inlet. The overflow hole 3 is inclined. Specifically, it can be understood that the axis A of the overflow hole and the axis B of the air inlet form an obtuse angle β in the direction of the air inlet 4. This allows air to smoothly overflow into the overflow hole 3 as it flows through. Furthermore, due to the presence of the drainage portion 2, the overflow hole 3 has a certain length, resulting in a better air overflow effect, allowing more air to overflow into the drone's installation cabin. The drainage portion 2 in this solution is integrally formed with the air inlet, eliminating the need for additional gluing and other steps for the drainage portion 2, thereby improving work efficiency. After integral molding, only a single oblique hole needs to be drilled.

[0023] Preferably, the drainage portion 2 is made of prepreg and is integrally formed with the air inlet body 1. A sandwich structure is provided in the drainage portion 2, and a filler is provided in the sandwich structure. The air inlet and the drainage portion 2 are both made of prepreg. When laying, a base layer is laid on the outer wall of the air inlet to form an outwardly protruding drainage portion 2. During the laying process, a sandwich can be provided at the location of the drainage portion 2. Other materials can be filled in the sandwich to facilitate better laying to form the outwardly protruding drainage portion 2, and the amount of prepreg required for laying the drainage portion 2 can also be reduced. The filler is foam, which is a relatively light material. After the drainage portion 2 is formed, the local load is not large. The foam will reduce weight by locally thickening it compared to prepreg, and the weight index of the drone will not be affected by the weight increase of the air inlet.

[0024] Preferably, the inner wall of the overflow hole 3 is coated with glue. Since the foam material has pores, it will disperse the overflowing air and disrupt the flow of air. The overflow hole 3 coated and hardened with glue has better transmission effect and higher efficiency when air overflows.

[0025] like Figure 2 As shown, the angle β is greater than 120° and less than 150°. If the angle between the oblique overflow hole 3 and the air inlet duct is too large or too small, the air overflow efficiency will be affected. After continuous testing, the angle β formed by the axis A of the overflow hole and the axis B of the air inlet duct in the direction of the air inlet 4 is greater than 120° and less than 150°, which is the optimal range. The air in the air inlet duct overflows into the overflow hole 3 with the highest efficiency.

[0026] Working principle: When manufacturing the air inlet duct, the local outer wall of the prepreg is thickened to form an outward-protruding drainage part 2. Specifically, foam can be used as a filler, which not only reduces the weight but also facilitates the rapid laying of the prepreg; after the laying is completed, a hole is opened along a certain angle to form an overflow hole 3 connected to the air inlet duct; due to the presence of foam, the inner wall of the overflow hole 3 is coated with glue, and it can be used after the glue dries. After entering from the air inlet of the air inlet duct, the air flows through here, and part of the air smoothly enters the obliquely arranged overflow hole 3 and is transmitted to the installation cabin of the drone.

[0027] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A high-efficiency overflow inlet duct structure, characterized in that: The invention comprises an air inlet duct body (1), wherein the side wall of the air inlet duct body (1) is provided with a drainage portion (2) protruding outward, the drainage portion (2) is provided with an overflow hole (3), and the overflow hole (3) is connected to the interior of the air inlet duct body (1); the overflow hole (3) is arranged at an angle, and the angle β between the axis A of the overflow hole and the axis B of the air inlet duct in the direction of the air inlet port (4) is an obtuse angle.

2. The high-efficiency overflow inlet duct structure according to claim 1, characterized in that: The angle is greater than 120° and less than 150°.

3. The high-efficiency overflow inlet duct structure according to claim 1, characterized in that: The drainage portion (2) is made of prepreg and is integrally formed with the air inlet duct body (1). A sandwich structure is provided in the drainage portion (2), and a filler is provided in the sandwich structure.

4. The high-efficiency overflow inlet duct structure according to claim 3, characterized in that: The filler is foam.

5. The high-efficiency overflow air inlet structure according to claim 4, characterized in that: The inner wall of the overflow hole (3) is coated with glue.

Images