JP3850552B2 - Aircraft cannon feed system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to a dehumidifying device for a pneumatic equipment used in a cold environment, for example, a system that feeds air to a cannon of an aircraft, particularly a pneumatic equipment such as a pneumatic bullet feeding system.
[0002]
[Prior art]
Conventionally, as shown in FIG. 3, when bullets are supplied to an aircraft cannon or the like, a bullet feed device 2 is attached to the aircraft 1, and an air motor 5 is connected from an engine-driven air compressor 3 via a hose 4, This was connected to the bullet feeding device 2 to drive the bullet feeding device 2, and the aircraft 1 was loaded with ammunition.
A simple dehumidifier is connected to a normal air compressor, but the place of use is in the factory and the temperature is not so low. In these dehumidifiers, the air conditioner is used in cold regions and high altitude bases. Cannot freeze.
[0003]
In addition, when a full-scale dehumidifier, for example, a refrigeration type compressed air dehumidifier is used, a new power source is required and the system is brought into contact with the refrigerant to condense, so that it cannot be used at 0 ° C. or lower. Furthermore, it is unsuitable for attaching to a movable compressor because it is large and heavy (height × depth × width = 500 × 500 × 250 mm to 1500 × 1000 × 500 mm).
In addition, when feeding an aircraft, an electric motor or the like as power cannot be used because the electric detonator of the bullet malfunctions due to electromagnetic waves or the like. Further, it is difficult to add more devices such as motors in order to ensure the reliability.
[0004]
[Problems to be solved by the invention]
The present invention Eamo moisture in the compressed air - is removed before the data, Eamo even at a low temperature - motor or the like and the bullet feed device cannon bullet feed of an aircraft to be safely operated connected thereto The purpose is to provide a system .
[0005]
[Means for Solving the Problems]
In an aircraft cannon feeding system , an air feeding device (2) is attached to an aircraft (1), an air motor (5) is connected from an air compressor (3) through a hose (4), and this is connected to a bullet feeding device ( 2) an aircraft gun feeding system for driving a bullet feeding device (2) connected to 2), wherein a cooling pipe (6) is provided between the air compressor (3) and the air motor (5). The buffer tank (9), the buffer tank (9) followed by the hollow fiber membrane dehumidifier (10), and the hollow fiber membrane dehumidifier (10) and the lubricator (11), respectively. .
[0006]
DETAILED DESCRIPTION OF THE INVENTION
The configuration of the dehumidifying device of the present invention is shown in FIG. In the present invention, the following configuration is connected between the air compressor 3 and the hose 4 in the conventional apparatus shown in FIG. Connected to the air compressor 3 via a cooling pipe 6. Next, a hollow fiber membrane dehumidifier 10 is connected to the buffer tank 9, and a lubricator 11 and a hose reel 12 are further connected. Drain pipes 7 and 8 are connected to the cooling pipe 6 and the buffer tank 9, respectively. The cooling pipe 6 is a stainless steel pipe having an inner diameter of 13 mm, a wall thickness of 1 mm, and a length of 4 m, for example, and is folded about 4 reciprocations at 1 m. The buffer tank 9 is made of, for example, steel having an outer diameter of 200 mm and a length of 450 mm, and the drain pipes 7 and 8 are ordinary hand-operated valves.
[0007]
The hollow fiber membrane-based dehumidifier 10 has a gas separation membrane formed hollow inside. The principle of the gas separation membrane is, as an example of removing water, when water having different water vapor partial pressures exists on both sides of the membrane, water molecules move through the membrane due to the water vapor partial pressure difference. More specifically, as shown in FIG. 2, the hollow fiber membrane utilization dehumidifier incorporates a hollow fiber membrane 10 a having a cylindrical shape inside, passes compressed air 10 b inside the hollow fiber membrane, and the hollow fiber membrane 10 a Dehumidification is performed by flowing dry air 10c to the outside and moving the internal moisture to the outside due to the difference in internal and external vapor pressures of the hollow fiber membrane 10a. A technique for accommodating the bundle of hollow fiber membranes in a sealed container is well known, but is equivalent to the technique disclosed in Japanese Patent Laid-Open No. 8-299743 as an example, and is omitted here. In addition, the dehumidifier has auto drain mechanisms 7 and 8. The lubricator 11 has a built-in mechanism for supplying a necessary amount of lubricating oil to the compressed air. The hose reel 12 is a mechanism for grouping the hose 4.
[0008]
(Function)
The present invention operates as follows. The high-temperature and high-humidity compressed air discharged from the compressor 3 is cooled by passing through the cooling pipe 6, and moisture in the compressed air is condensed on the inner wall of the cooling pipe 6 to perform first-stage dehumidification. In this case, if the cooling is performed by fully utilizing the cold environment and the cooling is more positive than the natural cooling, the condensed water is solidified and it becomes difficult to discharge. The cooling of only this pipe is sufficient until the temperature is about -30 ° C, but it is necessary to prevent overcooling with a sensor and a heater below that temperature.
[0009]
Next, the primary dehumidified compressed air flows into the buffer tank 9 and adiabatically expands with this, thereby lowering the temperature of the air and condensing moisture to perform second-stage dehumidification. Moisture accumulated in the cooling pipe 6 and the buffer tank 9 is appropriately discharged through drain pipes 7 and 8, respectively.
[0010]
Next, the compressed air is passed through the hollow fiber membrane 10a incorporated in the hollow fiber membrane dehumidifier 10 (FIG. 2), and the dry air is allowed to flow outside the hollow fiber membrane, thereby allowing the inside and outside of the membrane 10a to flow outside. The water vapor in the compressed air permeates into the membrane due to the difference in water vapor partial pressure with respect to the water, and dehumidification is continuously performed. Referring to FIG. 2, by supplying compressed air (wet air) to the inside of the hollow fiber membrane and purge air (dry air) to the outside, water vapor in the compressed air is caused by the difference in water vapor partial pressure between the inside and outside of the membrane. It penetrates into the membrane and is discharged from the outside together with purge air, and is continuously dehumidified. By itself, air at 20 ° C. and humidity of 100% has a minus 20 ° C. humidity of about 4.4%. Since the compressed air that has come so far has been removed not only with moisture but also with the lubricating oil necessary for the driving-side pneumatic device, the lubricator 11 supplies the required amount of lubricating oil to the compressed air.
[0011]
(Application areas)
It is suitable for operating pneumatic equipment using compressed air at construction sites, coal mines, airports, bases, etc. in cold districts as well as bullet feed equipment, and has a wide field of application.
[0012]
【The invention's effect】
According to the present invention, even if the outside air temperature is about minus 20 ° C. to minus 30 ° C. in a cold region and a highland base in the severe cold season, moisture in the compressed air does not freeze and the air motor operates normally.
That is, according to the present invention, moisture in the compressed air is removed before the air motor, and the air motor and the bullet feeding device connected thereto can be operated with peace of mind even at low temperatures.
Further, since no power source is required, powerful dehumidification is possible, and the structure is simple, a low-cost aircraft cannon feeding system can be provided.
[Brief description of the drawings]
FIG. 1 is a dehumidifying apparatus according to the present invention. FIG. 2 is a dehumidifier using a hollow fiber membrane used in the dehumidifying apparatus.
FIG. 3 shows a state of bullet feed to a conventional aircraft.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Aircraft 2 Bullet feeder 3 Air compressor 4 Hose 5 Air motor 6 Cooling pipe 7, 8 Drain pipe 9 Buffer tank
10 Dehumidifier using hollow fiber membrane 10a Hollow fiber membrane
10b Compressed air 11 Lubricator
12 hose reel

Claims (1)

The bullet feed device (2) is attached to the aircraft (1), the air motor (5) is connected from the air compressor (3) via the hose (4), and this is connected to the bullet feed device (2). (2) an engine cannonball feeding system for an aircraft, in which a buffer tank (9) is provided between the air compressor (3) and the air motor (5) via a cooling pipe (6). A machine gun for an aircraft comprising a tank (9), a hollow fiber membrane dehumidifier (10), and the hollow fiber membrane dehumidifier (10) and a lubricator (11), respectively. Ammunition system .

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