CN213627808U - Air bag type fuel supply device of powder ramjet engine - Google Patents
Air bag type fuel supply device of powder ramjet engine Download PDFInfo
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- CN213627808U CN213627808U CN202022736037.4U CN202022736037U CN213627808U CN 213627808 U CN213627808 U CN 213627808U CN 202022736037 U CN202022736037 U CN 202022736037U CN 213627808 U CN213627808 U CN 213627808U
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Abstract
The utility model provides a powder ramjet gasbag formula fuel feeding device adopts gasbag drive piston powder supply system. The air bag driving piston type powder supply system can realize the speed adjustment of the piston in a mode of adjusting the driving gas and the fluidizing gas amount, a piston driving device is not required to be additionally arranged, and when the pressure difference between the two sides of the driving cavity and the two sides of the fluidizing cavity is greater than resistance, the piston can be pushed to move.
Description
Technical Field
The utility model belongs to the ramjet field, concretely relates to powder ramjet gasbag formula fuel feeding device.
Background
The powder fuel ramjet adopts high-energy metal or boron powder as fuel, has the advantages of adjustable thrust and high specific impulse of a liquid fuel ramjet, safety and reliability of a solid rocket ramjet, simple structure and the like, particularly the addition of the powder fuel into the solid/powder or liquid/powder fuel combined ramjet can greatly improve the specific impulse and other performances of the traditional ramjet, can improve and increase the original functions of the traditional ramjet, and is one of new-generation missile power devices with great development potential. The powder supply technology is the core technology of the powder fuel ramjet, and the realization of continuous, stable and controllable supply of the powder fuel is the premise of reliable work of the engine and is the key for realizing stable combustion and thrust adjustment of the powder fuel ramjet.
Foreign people propose a fluidized bed type powder supply device aiming at a powder rocket ramjet, powder is filled in a fuel storage tank, fluidized gas is introduced from a piston rod, enters a powder bed body through an air distribution plate at the tail part of the storage tank and carries the powder to be sprayed out from an outlet, and the piston compresses the powder in the storage tank under the action of the other path of control gas. But the system structure is complex, which is not beneficial to the integration and light application of the powder fuel ramjet system. A set of powder fuel supply system is designed for domestic reference industrial pneumatic conveying device, as shown in figure 1, the system can work under high pressure, and a piston is pushed to advance by a linear motor. The motor-driven piston type powder supply system has obvious advantages in regulation and control of the motion stability of the piston, but the system has higher requirements for the power of the motor, particularly when the pressure in the storage tank is higher, if the modes such as isobaric balance and the like are not adopted, the motor hardly pushes the piston, the motion speed regulation of the piston is also hardly realized through the motor, and the other side is not favorable for system integration because the piston is directly connected with the motor rod, the length of the powder supply system can be correspondingly increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims at: an air bag type fuel supply device of a powder ramjet engine is provided, which adopts an air bag driving piston type powder supply system. The air bag driving piston type powder supply system can realize the speed adjustment of the piston in a mode of adjusting the driving gas and the fluidizing gas amount, a piston driving device is not required to be additionally arranged, and when the pressure difference between the two sides of the driving cavity and the two sides of the fluidizing cavity is greater than resistance, the piston can be pushed to move.
The inventive concept of the embodiment is as follows: the main design idea of the powder fuel supply device is to fluidize the powder fuel in the storage tank by using gas, ensure the continuous supply of the powder fuel under the pushing action of the air bag pushing piston, and finally spray the powder fuel into a combustion chamber in a gas-solid two-phase flow manner to complete the fuel supply process. The invention adopts the inflation and expansion of the elastic air bag to drive the piston, and adjusts the movement speed of the piston by controlling the inflation quantity of the air bag, thereby controlling the supply speed and the supply quantity of the powder and realizing the flow adjustment of the powder fuel; simultaneously, the powder is mixed with the fluidizing gas by applying the fluidizing gas through the fluidizing holes, so that the fluidized powder particles are convenient to combust.
The technical scheme of the utility model: the air bag type fuel supply device of the powder ramjet engine comprises a powder fuel storage tank 2, a piston 4, a driving air source and a fluidizing air source;
one end of the powder fuel storage tank 2 is provided with a driving gas interface 1; the driving gas interface 1 is communicated with a driving gas source;
the piston 4 is positioned in the powder fuel storage tank 2 and divides the powder fuel storage tank 2 into a first cavity and a second cavity, wherein the first cavity is communicated with the driving gas interface 1, and the second cavity is filled with metal powder fuel 5;
a fluidizing gas inlet 6 is arranged at an outlet of one end of the second cavity, which is far away from the piston 4, and the metal powder fuel 5 is mixed with fluidizing gas to form fluidized and mixed metal fuel 7; the fluidizing gas inlet 6 is communicated with a fluidizing gas source;
the gas pressure in the first cavity is adjusted by adjusting the driving gas source, so as to push the piston 4 to slide towards the metal powder fuel 5, and control the flow amount of the metal powder fuel 5.
Further, the fuel supply device also comprises an air bag 3, wherein the air bag 3 is positioned in the first cavity and is communicated with the driving gas interface 1; the driving gas source supplies gas into the air bag 3 through the driving gas interface 1, and the gas pressure in the air bag 3 is adjusted to push the piston 4 to slide towards the metal powder fuel 5.
Further, there is a gap between the piston 4 and the wall of the tank 2 for reducing the friction between the piston and the tank.
Further, the outlet of the second cavity is in a lava configuration for facilitating the blending of the metal powder fuel 5 with the fluidizing gas.
Further, the particle size of the metal powder fuel 5 is 8 to 12 μm.
Further, the fuel supply apparatus includes a powder disperser 8; the Laval-shaped structure is a gradually-reducing-gradually-expanding structure, and the gradually-expanding part of the Laval-shaped structure is provided with a powder disperser used for separating the blended metal fuel 7.
The utility model has the advantages that:
the speed of the piston is adjusted by adjusting the air bag driving air and the fluidization air, a piston driving device is not required to be additionally arranged, and when the pressure difference between the two sides of the driving cavity and the two sides of the fluidization cavity is greater than resistance, the piston can be pushed to move, so that the supply and the flow adjustment of the powder fuel are realized.
Description of the drawings:
FIG. 1 is a schematic view of a conventional powder feeder with a motor-driven piston;
FIG. 2 is a schematic view of the air bag driving piston powder supply device of the present invention;
description of reference numerals: 1-driving gas interface 2-powder fuel storage tank 3-air bag 4-piston 5-metal powder fuel 6-fluidizing gas inlet 7-fluidized mixed metal fuel 8-powder disperser.
The specific implementation mode is as follows:
the present invention is described in further detail below with reference to the attached drawings.
As a first embodiment of the present embodiment, the present embodiment provides a powder ramjet air bag type fuel supply device, which includes a powder fuel storage tank 2, a piston 4, a driving air source and a fluidizing air source. One end of the powder fuel storage tank 2 is provided with a driving gas interface 1; the driving gas interface 1 is communicated with a driving gas source; the piston 4 is positioned in the powder fuel storage tank 2 and divides the powder fuel storage tank 2 into a first cavity and a second cavity, wherein the first cavity is communicated with the driving gas interface 1, and the second cavity is filled with metal powder fuel 5; a fluidizing gas inlet 6 is arranged at an outlet of one end of the second cavity, which is far away from the piston 4, and the metal powder fuel 5 is mixed with fluidizing gas to form fluidized and mixed metal fuel 7; the fluidizing gas inlet 6 is in communication with a fluidizing gas source.
In this embodiment, the gas pressure in the first cavity is adjusted by adjusting the driving gas source, so as to push the piston 4 to slide toward the metal powder fuel 5, and control the flow amount of the metal powder fuel 5.
As another embodiment of this embodiment, this embodiment provides a powder ramjet engine air bag type fuel supply device, which includes, in addition to the above structure, an air bag 3, where the air bag 3 is located in the first cavity and is communicated with the driving gas port 1; the driving gas source supplies gas into the air bag 3 through the driving gas interface 1, and the gas pressure in the air bag 3 is adjusted to push the piston 4 to slide towards the metal powder fuel 5. A clearance is present between the piston 4 and the wall of the tank of the powdered fuel tank 2 for reducing the friction between the piston and the tank.
In addition, in both embodiments, the outlet of the second cavity is a lava configuration converging-diverging structure for facilitating the blending of the metal powder fuel 5 with the fluidizing gas. The particle size of the metal powder fuel 5 is 8-12 μm.
Further, the fuel supply device of the present invention further includes a powder disperser 8; the divergent part of the outlet of the second cavity of the powder fuel storage tank 2 is provided with a powder disperser which divides the blended metal fuel.
Specifically, taking a certain engine as an example:
when the engine is in operation, the driving gas enters the air bag through 1, and the fluidizing gas enters the powder fuel storage tank through 6. The pressure P1 of the driving gas (the adjusting range is 0.2-1MPa) and the pressure P2 of the fluidizing gas are adjusted to be 0.1-1.5MPa, so that a pressure difference P1-P2 is delta P between the two, and the power F of the driving piston is delta P.S obtained by multiplying the pressure difference by the area S of the piston. There is a small gap between the piston and the fuel storage tank, which can reduce the friction force between the piston and the storage tank to be close to zero, and prevent the fuel particles from passing through the piston, so as to push the piston and the powder fuel particles to move to the right with the diameter of about 10 μm. The metal powder fuel in the pressurized fuel tank is supplied to the fluidizing gas inlet. The fluidized gas and the metal powder are mixed, the mixture enters the combustion chamber to be combusted after passing through the dispersing device, primary combustion gas is formed, the primary combustion gas and gas entering the air inlet channel are combusted secondarily in the afterburning chamber of the ramjet engine, and the secondary combustion gas and the gas are sprayed out through the spray pipe to generate thrust.
Claims (6)
1. An air bag type fuel supply device of a powder ramjet engine is characterized by comprising a powder fuel storage tank (2), a piston (4), a driving air source and a fluidizing air source;
one end of the powder fuel storage tank (2) is provided with a driving gas interface (1); the driving gas interface (1) is communicated with a driving gas source;
the piston (4) is positioned in the powder fuel storage tank (2) and divides the powder fuel storage tank (2) into a first cavity and a second cavity, wherein the first cavity is communicated with the driving gas interface (1), and the second cavity is filled with metal powder fuel (5);
a fluidizing gas inlet (6) is arranged at an outlet of one end of the second cavity, which is far away from the piston (4), and the metal powder fuel (5) is mixed with fluidizing gas to form fluidized and mixed metal fuel (7); the fluidizing gas inlet (6) is communicated with a fluidizing gas source;
the gas pressure in the first cavity is adjusted by adjusting the driving gas source so as to push the piston (4) to slide towards the metal powder fuel (5) direction, so that the flow quantity of the metal powder fuel (5) is controlled.
2. The fuel supply device according to claim 1, characterized in that it further comprises an air bag (3), the air bag (3) being located in the first cavity and communicating with the drive gas port (1); the driving gas source supplies gas into the air bag (3) through the driving gas interface (1), and the gas pressure in the air bag (3) is adjusted to push the piston (4) to slide towards the direction of the metal powder fuel (5).
3. Fuel supply device according to claim 2, characterized in that a clearance is present between the piston (4) and the wall of the tank (2) for reducing the friction between the piston and the tank.
4. A fuel supply device according to claim 1, characterised in that the outlet of the second chamber is of a lava configuration, facilitating the blending of the metal powder fuel (5) with the fluidising gas.
5. The fuel supply apparatus according to claim 1, wherein the particle size of the metal powder fuel (5) is 8 to 12 μm.
6. The fuel supply device according to claim 4, characterized in that it comprises a powder disperser (8);
the Laval structure is a gradually-reducing-gradually-expanding structure, and the gradually-expanding part of the Laval structure is provided with a powder disperser used for separating the blended metal fuel (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022736037.4U CN213627808U (en) | 2020-11-20 | 2020-11-20 | Air bag type fuel supply device of powder ramjet engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022736037.4U CN213627808U (en) | 2020-11-20 | 2020-11-20 | Air bag type fuel supply device of powder ramjet engine |
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| CN213627808U true CN213627808U (en) | 2021-07-06 |
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| CN202022736037.4U Active CN213627808U (en) | 2020-11-20 | 2020-11-20 | Air bag type fuel supply device of powder ramjet engine |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810418A (en) * | 2022-04-28 | 2022-07-29 | 西安近代化学研究所 | Air pressure drive-based explosive column supply device and electronic control solid engine |
| CN114837849A (en) * | 2022-05-10 | 2022-08-02 | 南京航空航天大学 | Powder-liquid stamping combined engine and control method |
-
2020
- 2020-11-20 CN CN202022736037.4U patent/CN213627808U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114810418A (en) * | 2022-04-28 | 2022-07-29 | 西安近代化学研究所 | Air pressure drive-based explosive column supply device and electronic control solid engine |
| CN114837849A (en) * | 2022-05-10 | 2022-08-02 | 南京航空航天大学 | Powder-liquid stamping combined engine and control method |
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