A multi-stage gas boosting system

Abstract

The present invention belongs to the technical field of aviation fuel system. The present invention provides a multi-stage gas boosting system, including a multi-stage power source pyrotechnics, a connecting pipeline and a buffer deflector. The multi-stage power source pyrotechnics is a gas-producing structure ignited by electrical connection, and is provided with gas-producing medicine filled in compartments; the multi-stage power source pyrotechnics is connected to the buffer deflector through a connecting pipeline, and a buffer structure is provided in the buffer deflector to disperse and decelerate the high-pressure airflow at the inlet end and discharge it from the outlet end, and the buffer deflector is arranged in the air cushion area of ​​the aviation fuel tank. The present invention adopts a method that can realize pressure-controlled multiple gas production, and the amount of gas boosted each time is stable. It also ensures that the gas source is supplemented in the small space stage to meet the fuel supply pressure of the fuel system under the pressure of the fuel tank; by realizing a reasonable amount of gas-producing medicine filled, the remaining space of the fuel tank is calculated in advance, and combined with the load-bearing requirements of the fuel tank, it is ensured that the pressure value of the multi-stage boosting can be within a certain range, ensuring the boosting effect while preventing the deformation of the fuel tank.

Description

Technical Field

[0001] The invention belongs to the technical field of aviation fuel systems, and relates to a fuel system boosting system, and in particular to a multi-stage gas boosting system. Background Art

[0002] The gas pressurization system of the aircraft fuel system is mainly used to supplement the space for fuel consumption in the system and to ensure the fuel supply pressure of the fuel system. Traditional gas pressurization systems include engine bleed air pressurization and high-pressure gas cylinder pressurization.

[0003] The engine air bleed boost method is to cross-link the fuel system air system with the engine air system, introduce gas that meets the pressure requirements from behind the engine compressor, replenish the space for fuel consumption in the system and ensure the fuel supply pressure of the fuel system. Its disadvantage is that it requires a preset air bleed port on the engine and cross-links with the engine, and cannot independently complete the fuel system pressurization work.

[0004] The high-pressure gas cylinder boosting method is to install a high-pressure gas cylinder and a pressure reducing valve on the fuel system gas line. The high-pressure gas source stored in the high-pressure gas cylinder is reduced in pressure by the pressure reducing valve to replenish the space consumed by the fuel in the system and ensure the fuel supply pressure of the fuel system. The disadvantage is that the gas cylinder occupies a large space and the cost of the entire gas boosting system is relatively high. Summary of the invention

[0005] In order to solve the above problems, the present invention provides a multi-stage gas boosting system, which can independently complete the boosting work of the fuel system, occupies a small space and has low cost. It solves the above problems, has extremely high engineering application value, and is designed with multi-stage boosting to reduce the cross-linking of the fuel system gas boosting system and reduce the space occupied by the fuel system gas boosting system.

[0006] The technical solution of the present invention is as follows:

[0007] A multi-stage gas pressurization system includes a multi-stage power source pyrotechnic, a connecting pipeline and a buffer deflector. The multi-stage power source pyrotechnic is a gas-producing structure ignited by electrical connection, and is provided with gas-producing powder loaded in compartments; the multi-stage power source pyrotechnic is connected to the buffer deflector through a connecting pipeline, and a buffer structure is provided in the buffer deflector to disperse and slow down the high-pressure airflow at the inlet end and discharge it from the outlet end. The buffer deflector is arranged in the air cushion area of ​​the aviation fuel tank.

[0008] Furthermore, the multi-stage power source pyrotechnic device includes a plug, an internal circuit, a first-stage to N-stage ignition head, a first-stage to N-stage medicine chamber diaphragm, a first compartment to N-compartment, a gas compartment, a pipe joint, a pressure plate spring and a pressure plate; the plug is connected to the power supply, the pipe joint is connected to the connecting pipe, and the plug is connected to the internal circuit; the first-stage to N-stage ignition heads are respectively ignition structures of the first compartment to N-compartment, the gas-producing medicine is filled in the first compartment to N-compartment, the first compartment to N-compartment are separated from the gas compartment by the first-stage to N-stage medicine chamber diaphragms, and the other end of the gas compartment is a pipe joint; the first-stage ignition head is connected to the internal circuit, and the second-stage to N-stage ignition heads are connected to the internal circuit by the pressure plate spring and the pressure plate.

[0009] Furthermore, a safety structure is provided on the ignition heads of the second to Nth stages. The safety structure of this stage becomes invalid only after the ignition head of the previous stage works, and the ignition head of this stage can ignite only after being energized.

[0010] Furthermore, the pressure plate spring provides elastic force to the pressure plate to press the pressure plate between the internal circuit and the second to N-stage ignition heads; when the air pressure in the air cabin is greater than a certain value, the pressure plate overcomes the force of the pressure plate spring under the action of the air cabin pressure to disconnect the internal circuit and the second to N-stage ignition heads.

[0011] Furthermore, the elastic force value of the compression leaf spring is designed according to the amount of gas generating agent in the first cabin and the required fuel supply pressure of the fuel system.

[0012] Furthermore, the amount of gas generating agent in the first compartment is calculated based on the air cushion space of the fuel tank, the fuel supply pressure required for the first pressurization of the fuel system, and the pressure bearing capacity of the fuel tank.

[0013] Furthermore, the fuel consumption is estimated based on the amount of gas-generating agent in the cabin during the previous boost ignition, thereby calculating the gas space in the fuel tank, and then the amount of gas-generating agent in the cabin during this boost ignition is calculated in combination with the required fuel supply pressure of the fuel system and the pressure-bearing capacity of the fuel tank; and so on, the last boost ignition is expected to consume all the fuel.

[0014] Furthermore, a multi-stage power source pyrotechnic device diaphragm is provided between the pipeline joint and the air chamber. The multi-stage power source pyrotechnic device diaphragm is broken during the first pressurization, and previously separates the oil tank from the multi-stage power source pyrotechnic device.

[0015] Furthermore, the outlet end of the buffer deflector is a three-layer diffuser spherical structure baffle, each layer of the baffle is provided with a number of guide holes, and the positions of the guide holes between adjacent baffles are staggered, so that the airflow is dispersed and buffered here, and enters the fuel tank more evenly and dispersedly.

[0016] The beneficial effects of the present invention are as follows:

[0017] 1. The use of multi-stage power source pyrotechnics can achieve multiple gas production through pressure control, without the need to use high-pressure gas cylinders or external drainage, and the amount of gas pressurized each time is stable.

[0018] 2. Use a buffer deflector to reduce the impact on the fuel level and tank wall through pressure stabilization and gas diversion.

[0019] 3. The multi-stage power source pyrotechnics are used to provide the gas source, which ensures the gas source is replenished in the small space stage and meets the fuel tank pressure to ensure the fuel supply pressure of the fuel system.

[0020] 4. Different ignition heads corresponding to different compartments are designed in advance, so ignition can be carried out according to the predetermined sequence to ensure the pressurized fuel supply effect.

[0021] 5. By realizing a reasonable amount of gas-producing medicine to be filled, calculating the remaining space of the fuel tank in advance, and combining the load-bearing requirements of the fuel tank, it is ensured that the pressure value of the multi-stage boosting can be within a certain range, ensuring the boosting effect while never causing deformation of the fuel tank.

[0022] 6. The designed safety structure cooperates with the pressure plate spring to ensure that the pressure will not be increased in advance or out of sequence. It is safer and more reliable than the traditional high-pressure gas cylinder solution and engine air bleed solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solution of the implementation method of the patent of the present invention, the following is a brief introduction to the drawings required for use in the implementation method. It should be understood that the following drawings only show certain embodiments of the patent of the present invention and should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 It is a schematic diagram of the structure of the multi-stage power source pyrotechnic device of the present invention.

[0026] Figure 3 yes Figure 2 A magnified view of the area.

[0027] Figure 4 It is a schematic diagram of the structure of the buffer deflector of the present invention.

[0028] Among them, 1 is a multi-stage power source pyrotechnic, 2 is a connecting pipeline, 3 is a buffer tube, 4 is a buffer deflector, 5 is a plug, 6 is an internal circuit, 7 is a first-stage ignition head, 8 is a second-stage ignition head, 9 is a gas-generating powder, 10 is a powder chamber diaphragm, 11 is a gas chamber, 12 is a multi-stage power source pyrotechnic diaphragm, 13 is a pipeline joint, 14 is a pressure plate spring, 15 is a pressure plate, and 16 is an oil tank. DETAILED DESCRIPTION

[0029] This section is an embodiment of the present invention, which is used to explain and illustrate the technical solution of the present invention. In the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0030] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate directions or positional relationships as given in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or case referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are used only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implying the number of technical features indicated. Thus, features defined as "first", "second", etc. may explicitly or implicitly include more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0031] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be interpreted in a broad sense, for example, it can be a fixed connection, a detachable connection or an integrated connection; it can be a mechanical connection or a point connection; it can be a direct connection or a connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0032] The present invention adopts a multi-stage power source pyrotechnics to provide a gas source: the multi-stage power source pyrotechnics generate gas, and the gas enters the fuel tank after passing through a connecting pipeline, a buffer tube and a guide, replenishing the space for fuel consumption and ensuring the fuel supply pressure of the fuel system.

[0033] The following description refers to the attached Figure 1 System composition: The multi-stage gas boosting system consists of a multi-stage power source pyrotechnic product 1, a connecting pipeline 2, a buffer tube 3 and a buffer guide 4.

[0034] Component functions: The multi-stage power source pyrotechnic device 1 realizes gas generation; the connecting pipeline 2 realizes gas circulation, the buffer tube 3 realizes initial pressure stabilization of the gas, and the buffer deflector 4 realizes pressure stabilization and gas diversion.

[0035] Working principle of the system: The first stage of the multi-stage power source pyrotechnic device 1 generates gas, which enters the buffer tube 3 through the connecting pipe 2. After the gas pressure is initially stabilized, it enters the buffer guide 4 through the connecting pipe 2, and then enters the fuel tank after the gas pressure stabilizes; as the fuel is consumed, the gas pressure decreases, and after the pressure reaches a certain value, the second stage of the multi-stage power source pyrotechnic device 1 works, and the gas works and enters the fuel tank as the first time, and this process is repeated until the fuel is exhausted.

[0036] For further explanation, the following description refers to the attached Figure 2 and Figure 3 The multi-stage power source pyrotechnic device 1 is composed of a plug 5, an internal circuit 6, a first-stage ignition head 7, a second (multi-)stage ignition head 8, a gas generating charge 9, a gas generating charge capsule diaphragm 10, a gas capsule 11, a multi-stage power source pyrotechnic device diaphragm 12, a pipe joint 13, a pressure plate spring 14 and a pressure plate 15.

[0037] The external circuit is connected to the internal circuit 6 through the plug 5, the first-stage ignition head 7 is energized and ignited, and the gas-producing medicine 9 in the first cabin produces high-pressure gas. The high-pressure gas breaks through the diaphragm 10 of the gas-producing medicine cabin in the first cabin (according to the cabin design, each cabin is provided with a diaphragm, which can be designed as a multi-petal structure / the cabins are independent of each other. The two times in this article are examples. According to this idea, the third cabin, the fourth cabin, and so on can be designed), enters the gas cabin 11, breaks through the diaphragm 12 of the multi-stage power source pyrotechnics, and enters the gas pipeline through the pipe joint 13; when the fuel in the system is consumed and the pressure is reduced to a certain value, the pressure plate 15 in the second multi-stage ignition head 8 is connected to the circuit under the action of the pressure plate spring 14, the second (multi) stage ignition head 8 is ignited, and the gas-producing medicine 9 in the second multi-stage cabin starts to produce gas.

[0038] The following description refers to the attached Figure 4 : The initially stable gas enters the buffer deflector 4 through the connecting pipe 2, and the gas pressure enters the fuel tank after being further stabilized through the deflector hole 16. The bottom of the deflector is provided with three layers of diffuser spherical structure baffles, each layer of baffles is provided with a deflector hole 16, and the positions of the deflector holes 16 between adjacent baffles are staggered, so that the airflow is dispersed and buffered here, and enters the fuel tank more evenly and dispersedly.

[0039] The buffer tube 3 is a tube with a diameter larger than that of the connecting pipeline 2. The principle is to concentrate more gas by enlarging the tube diameter, so that the gas is buffered again and the speed of the gas flow is reduced.

[0040] The oil tank is a common multi-stage ventilated oil tank, and the buffer deflector 4 is arranged on the top of the first-stage oil tank.

[0041] The use of a multi-stage power source pyrotechnic device 1 can realize multiple gas production through pressure control; the use of a buffer deflector 4 can realize the function of reducing the impact on the fuel liquid surface and the tank wall through pressure stability and gas diversion. The present invention uses a multi-stage power source pyrotechnic device 1 to provide a gas source, ensuring that the gas source is supplemented in a small space stage, and realizes pressure stability and diversion of the airflow through a buffer tube 3 and a buffer deflector 4, so as to ensure the fuel supply pressure of the fuel system under the condition of the tank being under pressure.

[0042] The following description refers to the attached Figure 1 , Figure 2 , Figure 3 and Figure 4 .

[0043] The invention is composed of a multi-stage power source explosive device 1, a connecting pipeline 2, a buffer tube 3 and a buffer deflector 4.

[0044] To this end, the implementation methods are:

[0045] a) Calculate the total gas-generating charge 9 of the multi-stage power source pyrotechnic device 1 according to the fuel tank capacity and the fuel system supply pressure requirements;

[0046] b) Calculate the amount of gas generating agent 9 in the first compartment according to the air cushion space of the fuel system, the fuel supply pressure of the fuel system and the pressure bearing capacity of the fuel tank;

[0047] c) Design the pressure-receiving spring 14 and the pressure-receiving plate 15 control mechanism of the second-stage ignition head 8 according to the amount of gas-generating charge 9 in the first compartment and the fuel supply pressure of the fuel system; a safety mechanism is provided here, so that the control mechanism of the second compartment can only work after the first compartment is started, and when the pressure of the first compartment drops to a certain set value, the elastic force of the pressure-receiving spring 14 drives the pressure-receiving plate 15 to connect to the second (multi-)stage ignition head 8;

[0048] d) Calculate the amount of gas-generating medicine 9 in the second compartment according to the amount of gas-generating medicine 9 in the first compartment, the fuel supply pressure of the fuel system and the pressure bearing capacity of the fuel tank; calculate the gas space in the fuel tank according to the first gas production, the estimated fuel consumption, and then calculate the amount of gas-generating medicine 9 in the second compartment corresponding to the gas volume of the second pressurization in combination with the pressure bearing capacity of the fuel tank; and so on, the fuel is expected to be consumed in the last pressurization;

[0049] e) Calculate and distribute the amount of gas generating charge 9 to the remaining compartments of the multi-stage power source explosive device 1 in sequence;

[0050] f) Design the length and diameter of the buffer tube 3 according to the space on the installation route of the fuel system gas pipeline 2 (if there is no installation space, the buffer tube may not be designed);

[0051] g) Design the buffer deflector 4 according to the space of the air cushion area of ​​the fuel tank.

[0052] The present invention has been implemented and can be used according to the above working principle.

[0053] In this embodiment, the unclear contents and components can be realized by using the existing technology.

Claims

1. A multi-stage gas boosting system, characterized in that: The invention comprises a multi-stage power source pyrotechnic device (1), a connecting pipeline (2) and a buffer deflector (4); the multi-stage power source pyrotechnic device (1) is a gas-generating structure ignited by electrical connection, and is provided with gas-generating powder (9) filled in compartments; the multi-stage power source pyrotechnic device (1) is connected to the buffer deflector (4) through the connecting pipeline (2); the buffer deflector (4) is provided with a buffer structure to disperse and decelerate the high-pressure airflow at the inlet end and discharge it from the outlet end; the buffer deflector (4) is arranged in the air cushion area of ​​the aviation fuel tank; The multi-stage power source explosive device (1) comprises a plug (5), an internal circuit (6), first-stage to N-stage ignition heads, first-stage to N-stage medicine compartment diaphragms (10), first compartment to N-compartment, an air compartment (11), a pipe joint (13), a pressure plate spring (14) and a pressure plate (15); the plug (5) is connected to a power source, the pipe joint (13) is connected to a connecting pipe (2), and the plug (5) is connected to the internal circuit (6); the first-stage to N-stage points The ignition heads are ignition structures of the first compartment to the Nth compartment, respectively. The gas generating powder (9) is filled in the first compartment to the Nth compartment. The first compartment to the Nth compartment are separated from the gas compartment (11) by the first-stage to the Nth-stage medicine compartment diaphragms (10), respectively. The other end of the gas compartment (11) is a pipeline joint (13); the first-stage ignition head (7) is connected to the internal circuit (6), and the second-stage to the Nth-stage ignition heads are connected to the internal circuit (6) by the pressure plate spring (14) and the pressure plate (15); There is a safety structure on the second to Nth ignition heads. After the ignition head of the previous level works, the safety structure of this level will fail. The ignition head of this level can only ignite after being energized. The pressure-receiving plate spring (14) provides elastic force to the pressure-receiving plate (15) so as to press the pressure-receiving plate (15) between the internal circuit (6) and the second to Nth-stage ignition heads; when the air pressure in the air chamber (11) is greater than a certain value, the pressure-receiving plate (15) overcomes the force of the pressure-receiving plate spring (14) under the action of the pressure of the air chamber (11) and disconnects the internal circuit (6) and the second to Nth-stage ignition heads; The fuel consumption is estimated based on the amount of gas generating agent (9) in the cabin during the previous boost ignition, thereby calculating the gas space in the fuel tank. The amount of gas generating agent (9) in the cabin during the current boost ignition is calculated in combination with the fuel supply pressure required by the fuel system and the pressure bearing capacity of the fuel tank. By analogy, the fuel consumption is estimated to be completely consumed during the last boost ignition.

2. A multi-stage gas boosting system according to claim 1, characterized in that: The elastic force value of the compressed leaf spring (14) is designed according to the amount of the gas generating agent (9) in the first compartment and the required fuel supply pressure of the fuel system.

3. A multi-stage gas boosting system according to claim 1, characterized in that: The amount of gas generating agent (9) in the first compartment is calculated based on the air cushion space of the fuel tank, the fuel supply pressure required for the first pressurization of the fuel system and the pressure bearing capacity of the fuel tank.

4. A multi-stage gas boosting system according to claim 1, characterized in that: A multi-stage power source explosive device diaphragm (12) is provided between the pipeline joint (13) and the gas chamber (11).

5. A multi-stage gas boosting system according to claim 1, characterized in that: The outlet end of the buffer guide (4) is a three-layer diffuser spherical structure partition, each layer of the partition is provided with a plurality of guide holes (16), and the positions of the guide holes (16) between adjacent partitions are staggered.

Images