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Variable outlet duct system

A channeling and variable technology, applied in the aviation field, can solve problems such as large environmental impact and heavy helicopter weight

Pending Publication Date: 2022-03-15
CHINA HELICOPTER RES & DEV INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention provides a variable outlet duct system, which solves the problem that the existing duct is too large, resulting in excessive weight of the helicopter itself, and too small, resulting in a relatively large impact on the environment

Method used

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Embodiment Construction

[0030] The variable outlet duct system provided by the present invention will be explained below in conjunction with the accompanying drawings.

[0031] The present invention considers that under the premise of the same lift requirement, the downwash airflow velocity generated by the large-size rotor system is small, which is more friendly to the environment, but the weight of the large-size rotor and duct increases greatly, resulting in excessive weight of the aircraft itself; and light weight The small-sized duct system produces a large downwash airflow, which has a greater impact on the environment, such as more obvious dust effects. Therefore, a duct system with variable outlet diameter is needed here to keep the size and weight small, but the duct outlet can be enlarged during vertical take-off and landing, so that the outlet airflow can be better diffused, thereby increasing the area affected by the duct airflow , reduce the downwash air velocity of the duct, and improve...

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Abstract

The invention provides a ducted system with a variable outlet. A ducted outlet (6) comprises a ducted wall connector (61), an elastic lip (62), an outlet mounting ring (63), a supporting spring (64), a variable lip support (65), a driving rod (66) and a driving seat (67). The duct wall interface (61), the elastic lip (62) and the outlet mounting ring (63) are annular and are sequentially connected from top to bottom; the supporting spring (64) is in a horn mouth shape, and a plurality of variable lip supports (65) are arranged in the circumferential direction of the supporting spring (64). Each variable lip support (65) is connected with a driving seat (67) through a driving rod (66), and the driving seat (67) drives the driving rods (66) to drive the variable lip supports (65) to move, so that the diameter and the appearance of the elastic lip (62) are changed. The diameter of the duct outlet is variable, the environment friendliness of the duct system can be improved, and the flight efficiency can be improved during forward flight.

Description

technical field [0001] The invention belongs to the field of aviation technology, and in particular relates to a variable outlet duct system. Background technique [0002] The rotor system generates lift through its own rotation, providing lift and propulsion for the aircraft to take off and land vertically. However, because the rotating rotor poses a threat to the surrounding personnel and the environment, there is a rotor system with duct protection, that is, the duct. System, the duct not only plays a protective role in the duct system, but also provides additional lift, which can improve flight efficiency, reduce the size and weight of the rotor accordingly. [0003] However, the downwash airflow produced by the light-weight and small-sized duct system is large, which has a greater impact on the environment, such as the dust effect is more obvious. If the large-sized rotor system and duct are directly selected, although it is environmentally friendly, it will There is a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64C21/08
CPCB64C21/08B64U50/14
Inventor 刘衍涛
Owner CHINA HELICOPTER RES & DEV INST
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