CN104648674A - Low-resistance fan-aided ejecting air feeding device - Google Patents

Abstract

The invention belongs to the field of aviation and relates to a low-resistance fan auxiliary ejection air intake device. A low-resistance fan auxiliary ejection air intake device, further comprising an ejection pipe (3), an auxiliary air intake pipe (7) and a fan (8); the auxiliary air intake pipe (7) passes through the ejection pipe (3) and the main air intake pipe (2) is connected to the cooling pipe (4), and the fan (8) is located on the channel of the auxiliary air intake pipe (7). In the present invention, a fan is arranged on the passage of the auxiliary air intake pipe for auxiliary air intake, and when the kinetic energy of stamping is small or there is no stamping energy, cooling air is provided to the equipment. At the same time, the fan airflow is used to realize the ejection effect on the gas in the main air intake pipe through the ejector pipe, so as to improve the cooling efficiency of the equipment. When the fan is not required to work or the fan is faulty, the fan does not occupy the channel of the main air intake pipeline and does not increase the flow resistance of the main air intake pipeline.

Description

A low-resistance fan-assisted ejection air intake device

technical field

The invention belongs to the field of aviation and relates to a low-resistance fan auxiliary ejection air intake device.

Background technique

In the cooling design of aircraft equipment, the equipment is generally ventilated and cooled by introducing outside air and connecting it to the equipment through pipelines. The driving force of the cooling air mainly depends on the ram kinetic energy of the aircraft during flight. When the aircraft is at rest or at low speed, because there is no stamping kinetic energy or the stamping kinetic energy is very small, the cooling air flow is very small, which cannot meet the heat dissipation and cooling requirements of the long-term work of the equipment. Adding a fan to the duct can provide cooling airflow when there is no ram energy, but the fan will increase the duct resistance when there is ram energy or the fan fails.

Contents of the invention

The purpose of the present invention is to provide an air intake device that can use a fan to assist in introducing intake air, and at the same time, does not increase the flow resistance of the pipeline when the fan is not working.

The technical solution of the present invention is: a low-resistance fan-assisted injection air intake device, including a ram air intake (1), a main air intake pipe (2), a cooling pipe (4), a device (5) and an exhaust pipe ( 6); wherein, the ram air intake (1) is installed on the outer skin, and the cooling air is introduced through the main air intake pipe (2), passes through the cooling pipe (4), provides cooling air for the equipment (5), and Exhausted through the exhaust pipe (6), it also includes the ejector pipe (3), the auxiliary air inlet pipe (7) and the fan (8); the auxiliary air inlet pipe (7) passes through the ejector pipe (3) and the main air inlet pipe (2) It is connected with the cooling pipe (4), and the fan (8) is located on the channel of the auxiliary air intake pipe (7).

The ejector pipe (3) has an annular outlet configuration and is coaxial with the main inlet pipe (2).

When the speed of the aircraft is high, the fan (8) does not work when the airflow entering the ram air inlet (1) by means of ram kinetic energy can meet the cooling requirements of the equipment (5). When the ram air cannot meet the flow requirements, the fan (8) works to provide cooling air to the equipment through the auxiliary air intake pipe (7), and at the same time, the airflow of the auxiliary air intake pipe (7) passes through the ejector pipe (3) to play the role of ejection, Drive the airflow from the main air intake pipe (2) into the cooling pipe (4) to provide cooling airflow to the equipment (5).

The present invention has the advantages and beneficial effects: the present invention sets a fan on the passage of the auxiliary air intake pipe for auxiliary air intake, and provides cooling air to the equipment when there is little or no punching kinetic energy. At the same time, the fan airflow is used to realize the ejection effect on the gas in the main air intake pipe through the ejector pipe, so as to improve the cooling efficiency of the equipment. When the fan is not required to work or the fan is faulty, the fan does not occupy the channel of the main air intake pipeline and does not increase the flow resistance of the main air intake pipeline.

Description of drawings

Fig. 1 is a schematic structural view of a low-resistance fan-assisted injection air intake device of the present invention,

Among them, 1-ram air intake, 2-main air intake pipe, 3-extraction pipe, 4-cooling pipe, 5-equipment, 6-exhaust pipe, 7-auxiliary air intake pipe, 8-fan.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

Please refer to FIG. 1 , which is a schematic diagram of the structure of the low-resistance fan-assisted introduction air intake device of the present invention.

The low-resistance fan auxiliary injection air intake device includes a ram air inlet (1), a main air intake pipe (2), an injection pipe (3), a cooling pipe (4), equipment (5), and an exhaust pipe (6), auxiliary air intake pipe (7), fan (8). Wherein, the ram air intake (1) is located on the outer skin, and the air taken from the outside enters the main air intake pipe (2), and is supplied to the equipment (5) for cooling through the cooling pipe (4). The auxiliary air intake pipe (7) is connected with the main air intake pipe (2) and the cooling pipe (4) through the ejector pipe (3). The fan (8) is located on the passage of the auxiliary air intake pipe (7).

During implementation, the work of the fan can be controlled by the aircraft management computer or the engine controller according to the temperature of the equipment, and can also be controlled independently by the equipment itself. When the speed of the aircraft is high, the fan does not work when the air flow entering the ram air intake by the ram kinetic energy can meet the cooling requirements of the equipment. When the ram air cannot meet the flow requirements, the fan works to provide cooling air to the equipment through the auxiliary intake pipe. At the same time, the airflow of the auxiliary intake pipe passes through the ejector pipe to play an ejection role, driving the airflow of the main intake pipe into the cooling pipe to provide cooling airflow for the equipment. The invention utilizes the fan to assist the air intake cooling equipment, and at the same time forms ejection to drive the main air intake pipe to intake air, thereby improving the cooling effect. When the fan is not working, the fan does not occupy the channel of the main cooling pipe and does not increase the flow resistance of the main air intake pipe.

Claims (3)

1. A low-resistance fan-assisted injection air intake device, including a ram air intake (1), a main air intake pipe (2), a cooling pipe (4), equipment (5) and an exhaust pipe (6); wherein, The ram air intake (1) is installed on the outer skin, and the cooling air is introduced through the main air intake pipe (2), passes through the cooling pipe (4), provides cooling air for the equipment (5), and passes through the exhaust pipe ( 6) Exhaust, which is characterized in that it also includes an ejector pipe (3), an auxiliary air intake pipe (7) and a fan (8); the auxiliary air inlet pipe (7) connects with the main air inlet pipe (2) and The cooling pipes (4) are connected, and the fan (8) is located on the channel of the auxiliary air intake pipe (7). 2. The low-resistance fan-assisted injection air intake device according to claim 1, characterized in that: the injection pipe (3) is in the shape of an annular outlet, and is coaxial with the main air intake pipe (2). 3. The low-resistance fan-assisted ejection air intake device according to claim 1 or 2, characterized in that: when the aircraft speed is high, the air flow entering the ram air intake (1) by means of ram kinetic energy can meet the requirements of the equipment ( 5) When cooling is required, the fan (8) does not work; when the ram air cannot meet the flow requirements, the fan (8) works to provide cooling air to the equipment through the auxiliary air intake pipe (7), and at the same time, the air flow through the auxiliary air intake pipe (7) Through the ejection pipe (3), it plays the role of ejection, driving the airflow of the main air intake pipe (2) into the cooling pipe (4), providing cooling airflow for the equipment (5).