Replaceable air filter element air inlet pressure stabilization chamber, internal combustion engine and unmanned aerial vehicle

Abstract

The utility model discloses a replaceable air filter core air inlet pressure stabilization chamber, internal combustion engine and unmanned plane, include: the pressure stabilization chamber body, its inside constitution is used for stabilizing the main cavity of airflow, throttle flange, set up in the upstream end of pressure stabilization chamber body, be used for connecting throttle body, air inlet flange, set up in the downstream end of pressure stabilization chamber body, be used for connecting engine, air filter core box, it is connected with the installation mouth of being set up on the pressure stabilization chamber body wall surface in detachable mode to embed in main cavity, air filter core, its accommodation is in the inside of air filter core box, wherein, the airflow of flowing through throttle flange is after entering main cavity, passes through air filter core and filters, finally is transported to engine through air inlet flange.

Description

Technical Field

[0001] This utility model relates to the field of internal combustion engine technology, and in particular to a replaceable air filter intake pressure regulating chamber, an internal combustion engine, and a drone. Background Technology

[0002] In applications of internal combustion engines, especially piston engines for aviation, such as UAV power systems, there are extreme requirements for the compactness, lightweight design, and reliability of the power mechanism. The more compact the structure and the fewer the number of accessories, the better it is for the aircraft cabin layout, reducing overall weight and failure rate, thereby improving flight performance.

[0003] Currently, traditional air intake systems typically consist of multiple independent components such as air filters, intake piping, pressure regulating chambers, and intake manifolds, connected in series via flanges and clamps. This split design has the following inherent drawbacks: First, the multiple independent components and connectors result in a loosely structured, space-consuming, and heavy air intake system, contradicting the high integration requirements of the aerospace industry. Second, lengthy intake piping increases intake drag and may cause unnecessary pressure losses, affecting engine intake efficiency. Furthermore, too many connection points also mean a higher potential risk of leakage, reducing system reliability.

[0004] Therefore, there is an urgent need for a highly integrated intake pressure regulating chamber design that can effectively reduce the number of parts and simplify the overall structure while ensuring intake efficiency and filtration function, so as to meet the stringent requirements of aero engines for compactness, lightweight and high reliability. Summary of the Invention

[0005] The technical problem to be solved by the present invention

[0006] Addressing the problems of loosely structured, numerous components, large space occupation, and insufficient intake efficiency in existing air intake systems, this invention aims to provide a highly integrated replaceable air filter intake pressure regulating chamber, internal combustion engine, and unmanned aerial vehicle (UAV). Its core objective is to directly integrate the air filter module through structural innovation, eliminating the need for a separate external air filter and connecting pipelines. This significantly reduces the number of parts, lowers overall weight and assembly complexity, while optimizing the intake process and improving engine intake efficiency and dynamic response performance, particularly meeting the aerospace industry's stringent requirements for compactness, lightweight design, and high reliability in power systems.

[0007] Technical solutions adopted to solve the above-mentioned technical problems

[0008] This invention provides a replaceable air filter intake pressure regulating chamber, comprising: a pressure regulating chamber body, the interior of which forms a main cavity for stabilizing airflow; a throttle valve connecting flange disposed at the upstream end of the pressure regulating chamber body for connecting to a throttle valve body; an intake flange disposed at the downstream end of the pressure regulating chamber body for connecting to an engine; an air filter cartridge detachably connected to an installation port on the wall of the pressure regulating chamber body and embedded in the main cavity; and an air filter element housed inside the air filter cartridge.

[0009] The airflow flowing through the throttle valve connecting flange enters the main cavity, passes through the air filter element for filtration, and is finally delivered to the engine via the intake flange.

[0010] Preferably, the air filter cartridge and the mounting port on the pressure stabilizing chamber body are connected by a guide rail structure for sliding insertion and removal, and are locked by fasteners such as bolts, thereby achieving quick and reliable installation and disassembly.

[0011] Furthermore, to ensure airtightness and prevent unfiltered air leakage, a rubber sealing ring is provided between the contact surface of the air filter cartridge and the mounting port.

[0012] Furthermore, a fuel nozzle mounting flange can be integrated onto the pressure stabilizing chamber body for mounting fuel nozzles, thus enabling manifold injection and further enhancing the functional integration of the component. Simultaneously, the outer wall of the pressure stabilizing chamber body can also be provided with an integrally formed expansion boss, providing an interface for mounting other sensors or accessories, improving the design's scalability and adaptability.

[0013] Compared with the prior art, the present invention has the following significant advantages:

[0014] Highly integrated and compact: The air filter and intake pressure regulating chamber are combined into one, eliminating the need for a separate air filter assembly and separate components such as the "clean air pipe" and "clamp" connecting them. This greatly reduces the number of accessories, lowers the overall weight, volume and assembly complexity of the system, and optimizes the space layout.

[0015] Easy maintenance and reduced costs: The air filter cartridge and air filter element are assembled in a quick-release configuration. When replacing the air filter element, simply open the air filter cartridge for replacement; there is no need to disassemble the entire intake pipe or pressure regulating chamber. The maintenance operation is extremely simple, saving maintenance time and costs.

[0016] Reliable sealing and stable performance: The use of a special sealing ring and fastening connection method ensures the sealing of the connection between the air filter core box and the pressure stabilizing chamber body, effectively preventing air leakage and ensuring the stable operation of the engine intake system.

[0017] Optimized intake for improved efficiency: By eliminating lengthy connecting pipes and shortening the intake airflow path, intake resistance is effectively reduced. Simultaneously, the optimized pressure-stabilizing chamber structure, combined with integrated filtration, contributes to improved intake efficiency, enhancing engine charging performance and dynamic response.

[0018] Highly expandable functionality: The integrated fuel nozzle flange and extension boss design provides the system with more possibilities for functional expansion, adapting to the personalized needs of different application scenarios.

[0019] In summary, this invention effectively solves many of the pain points of traditional air intake systems through ingenious modular integrated design, and is particularly suitable for fields with extremely high requirements for space, weight and reliability, such as aircraft piston engines and UAV power systems. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this embodiment;

[0021] Figure 2 This is a structural schematic diagram from another perspective of this embodiment;

[0022] Figure 3 This is a schematic diagram of the internal structure of this embodiment;

[0023] Reference numerals in the attached drawings: 1-Pressure stabilizing chamber body; 2-Throttle valve connecting flange; 3-Intake flange; 4-Air filter element box; 5-Air filter element; 6-Sealing ring; 7-Fuel injector mounting flange; 8-Extension boss. Detailed Implementation

[0024] The following is in conjunction with the appendix Figure 1-3 This utility model will be described in further detail.

[0025] The preferred embodiment of a replaceable air filter intake pressure regulating chamber according to the present invention will be described in detail below with reference to the accompanying drawings. The objectives and effects of the present invention will become clearer.

[0026] like Figure 1 , Figure 2 as well as Figure 3 As shown, the present invention provides a replaceable air filter intake pressure regulating chamber, which mainly consists of a pressure regulating chamber body 1, an air filter cartridge 4, and an air filter element 5.

[0027] The pressure stabilizing chamber body 1 is a sealed cavity made of cast aluminum alloy or injection molded engineering plastic. Its internal cavity is mainly used to stabilize and store intake air. The pressure stabilizing chamber body 1 integrates multiple functional interfaces: its upstream end has a throttle valve connecting flange 2 for connecting to the throttle body; its downstream end has an intake flange 3 for connecting to the engine cylinder, which is fixed to the engine cylinder head with bolts to introduce stabilized air into the engine; in addition, the pressure stabilizing chamber body 1 also has one or more fuel injector mounting flanges 7 for mounting fuel injectors, enabling the device to also have manifold injection functionality, further improving integration. For easy installation of other sensors or accessories, the outer wall of the pressure stabilizing chamber body 1 also has an integrally formed extension boss 8.

[0028] The core improvement of this invention lies in the fact that a rectangular mounting opening is provided on the top of the voltage stabilizing chamber body 1 (or, depending on design requirements, on the side wall). A guide rail structure is provided on the inner side wall of the mounting opening.

[0029] An independent air filter cartridge 4 is slidably inserted into the mounting port via the guide rail structure, thereby embedding itself into the internal cavity of the pressure regulating chamber body 1. The air filter cartridge 4 is a frame-shaped structure with an open top and closed sides and bottom, and its interior is used to accommodate and fix a standardized air filter element 5. The air filter cartridge 4 and the air filter element 5 are detachably assembled, facilitating the individual replacement of the air filter element 5.

[0030] To ensure airtightness and prevent unfiltered air leakage, a sealing groove is provided on the flange edge of the air filter cartridge 4 that contacts the mounting port, and a rubber sealing ring 6 is embedded in the groove. After the air filter cartridge 4 is fully inserted along the guide rail, fasteners (such as bolts) are used to secure the flange edge of the air filter cartridge 4 to the mounting port flange edge on the pressure regulating chamber body 1, and the rubber sealing ring 6 is compressed to form a reliable seal.

[0031] Working principle and replacement procedure:

[0032] Intake and Filtration: External air first enters the internal cavity of the pressure regulating chamber body 1 through the throttle body connected to the throttle body flange 2. Subsequently, the air is filtered as it flows through the air filter element 5 integrated in the cavity, and the clean air is delivered to the engine intake manifold connected to the intake flange 3.

[0033] Air filter element 5 replacement: When air filter element 5 requires maintenance, simply loosen and remove the fasteners to pull the entire air filter element housing 4 out of the pressure regulating chamber body 1 along the guide rail. Then, remove the old air filter element 5 from the air filter element housing 4, replace it with a new air filter element 5, and then push the air filter element housing 4 containing the new air filter element 5 back into place along the guide rail and tighten the bolts to complete the replacement. The entire process requires no disassembly of any intake pipes, making the operation extremely simple.

[0034] Beneficial effects

[0035] This embodiment integrates the air filtration module (air filter cartridge 4 and air filter element 5) directly into the intake pressure regulating chamber, eliminating the need for a traditional separate air filter assembly and the clean air pipes and clamps connecting them. This not only significantly reduces the number of parts, simplifies the structure, reduces weight and potential leakage points, but also shortens the intake air passage, reduces intake resistance, and helps improve engine intake efficiency and dynamic response performance. Its highly integrated feature is particularly suitable for applications with extreme space and weight requirements, such as aircraft piston engines and UAV power systems.

[0036] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

[0037] This specific embodiment is merely an explanation of the utility model and is not intended to limit it. After reading this specification, those skilled in the art can make modifications to this embodiment without contributing any inventive step, but such modifications are protected by patent law as long as they fall within the scope of protection of this utility model.

Claims

1. A replaceable air filter intake pressure regulating chamber, comprising: The pressure stabilizing chamber body (1) has an internal cavity for stabilizing the airflow; Throttle valve connecting flange (2) is located at the upstream end of the pressure regulating chamber body (1) and is used to connect the throttle valve body; An intake flange (3) is located at the downstream end of the pressure stabilizing chamber body (1) and is used to connect to the engine; The air filter cartridge (4) is detachably connected to the mounting port opened on the wall of the pressure stabilizing chamber body (1) and embedded in the main cavity; An air filter element (5) is housed inside the air filter element box (4); The airflow flowing through the throttle valve connecting flange (2) enters the main cavity, passes through the air filter element (5) for filtration, and is finally delivered to the engine via the intake flange (3).

2. The replaceable air filter element inlet pressure regulating chamber according to claim 1, characterized in that: The air filter cartridge (4) is connected to the mounting port via a guide rail structure and is fixed by fasteners.

3. The replaceable air filter element inlet pressure regulating chamber according to claim 2, characterized in that: A sealing ring (6) is provided on the contact surface between the air filter cartridge (4) and the mounting port.

4. The replaceable air filter element inlet pressure regulating chamber according to claim 1, characterized in that: The pressure stabilizing chamber body (1) is also provided with a fuel nozzle mounting flange (7).

5. The replaceable air filter element inlet pressure regulating chamber according to claim 1, characterized in that: The stabilizing chamber body (1) is made of aluminum alloy or engineering plastic.

6. The replaceable air filter element inlet pressure regulating chamber according to claim 1, characterized in that: The pressure stabilizing chamber body (1) is also provided with one or more extension bosses (8) for mounting accessories.

7. An internal combustion engine, characterized in that: Includes the replaceable air filter intake pressure regulating chamber as described in any one of claims 1 to 6.

8. An unmanned aerial vehicle (UAV), characterized in that: Including the internal combustion engine as described in claim 7.

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