CN216518320U - Gas generator - Google Patents
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- CN216518320U CN216518320U CN202220040843.4U CN202220040843U CN216518320U CN 216518320 U CN216518320 U CN 216518320U CN 202220040843 U CN202220040843 U CN 202220040843U CN 216518320 U CN216518320 U CN 216518320U
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Abstract
The utility model discloses a fuel gas generator, which comprises a combustion chamber head, a combustion chamber body connected with the combustion chamber head and a spark plug arranged on a combustion chamber, wherein the combustion chamber head comprises an injector, a fuel liquid collecting ring arranged at the periphery of the injector and a liquid oxygen liquid collecting cavity arranged above the injector, the liquid oxygen liquid collecting cavity is provided with a liquid oxygen inlet pipe joint, the fuel liquid collecting ring is provided with a fuel inlet pipe joint, the injector comprises a plurality of coaxial injection units, each coaxial injection unit comprises a central liquid oxygen flow channel and an outer ring fuel flow channel, the central liquid oxygen flow channel is communicated with the liquid oxygen liquid collecting cavity, the outer ring fuel flow channel is communicated with the fuel liquid collecting ring, and a tail end liquid oxygen nozzle of the central liquid oxygen flow channel and a tail end fuel nozzle of the outer ring fuel flow channel are both communicated with the combustion chamber body. The mixing ratio of the central area of the gas generator is close to the equivalent mixing ratio, so that combustion can be promoted, and the ignition success rate is improved; the mixing ratio of the edge area is far away from the equivalent mixing ratio, the temperature of the fuel gas is limited not to be too high, and the working time can be prolonged.
Description
Technical Field
The utility model relates to the field of gas generators, in particular to a gas generator.
Background
The Liquid Rocket Engine (LRE) has high technical maturity and inheritance, low development risk and cost, and is a preferred propulsion scheme of a reusable Rocket, wherein the reusability of the Liquid oxygen methane Engine is optimal, and in recent years, the gravity center of aerospace research institutions of various countries starts to be transferred to the Liquid oxygen methane Engine. Methane is abundant in nature, is the main component of natural gas, combustible ice and the like, and has a price far lower than that of kerosene and liquid hydrogen. As a propellant of a rocket engine, methane has excellent performance. The methane propellant is non-toxic and pollution-free, belongs to a green propellant, and is convenient to use and maintain. As the hydrocarbon fuel with the lightest molar mass, the methane has excellent combustion performance, low carbon deposition, no coking during cooling and good material compatibility. The potential life of a liquid oxymethane engine is therefore longer than that of a conventional engine.
The existing high-thrust liquid rocket engines are all pump pressure type schemes, a propellant is conveyed by a turbine driving pump, and working medium for driving the turbine is provided by a fuel gas generator. The gas generator is a device for generating high-temperature gas, and consists of an injector, a combustion chamber, a spray pipe and an ignition device. The gas generator typically uses the same propellant as the primary combustion chamber, but does not have the same operating characteristics as the primary combustion chamber. In order to ensure that the turbine blade temperature does not exceed the permissible material limit, the gas temperature of the gas generator is lower than that of the main combustion chamber; the mixing ratio of the propellant deviates from the stoichiometric mixing ratio, and the ratio of the propellant flow to the total engine flow is very small. To ensure reliable ignition, the propellant burns centrally in the central area.
The design of the gas generator needs to be different from the traditional design in order to meet the requirements of high efficiency, high reliability and reusability of the liquid oxygen methane engine. Because the liquid oxygen methane engine adopts double low-temperature propellant and the mixing ratio is offset, the reliable ignition of the fuel gas generator is difficult abnormally. The gas temperature of the gas generator exceeds 1000 ℃, and if no thermal protection measures are taken, the temperature of the inner wall does not exceed 10s, namely the allowable limit of the metal material is exceeded. The primary combustion chamber is typically thermally protected effectively using regenerative cooling techniques, and the injectors are typically not thermally protected.
However, the design and processing of the existing gas generator are based on a disposable liquid rocket engine combustion chamber, modularization, interchangeability and maintainability are not considered, all parts are mainly connected in a welding mode, disassembly and assembly are troublesome, when a certain part fails, the whole body loses basic functions, the gas generator is not suitable for testing functions of different structures in a ground test, and the cost is high.
The gas generator adopting the double low-temperature propellants is difficult to ignite abnormally reliably, an igniter of the existing gas generator is arranged at the head, high-temperature ignition gas is led into a combustion chamber through a long thin tube and flows through a low-temperature fuel cavity at the head, the stroke is long, the temperature loss of the gas is large, and the ignition failure of the gas generator is often caused.
The existing gas generator scheme adopts radiation cooling and regenerative cooling, the injector has no thermal protection measures, and only can thermally protect the body part of the combustion chamber, so that the injector is easy to overheat or even burn, the use times of the gas generator are limited, the temperature of gas generated by the gas generator is also limited, and the temperature can not exceed 1000 ℃.
In summary, how to effectively solve the problems of reliable ignition and effective thermal protection of the gas generator is an urgent need for those skilled in the art.
SUMMERY OF THE UTILITY MODEL
It is an object of the present invention to provide a gas generator that improves the success rate of ignition and the effectiveness of thermal protection.
In order to solve the technical problems, the utility model provides the following technical scheme:
a gas generator comprises a combustion chamber head, a combustion chamber body connected with the combustion chamber head and a spark plug arranged on the combustion chamber,
the combustion chamber head comprises an injector, a fuel liquid collecting ring arranged on the periphery of the injector and a liquid oxygen liquid collecting cavity arranged on the injector, wherein a liquid oxygen inlet pipe joint is arranged on the liquid oxygen liquid collecting cavity, a fuel inlet pipe joint is arranged on the fuel liquid collecting ring,
the injector comprises a plurality of coaxial injection units, the coaxial injection units comprise a central liquid oxygen flow channel and an outer ring fuel flow channel, the central liquid oxygen flow channel is communicated with the liquid oxygen liquid collecting cavity, the outer ring fuel flow channel is communicated with the fuel liquid collecting ring, and a tail end liquid oxygen nozzle of the central liquid oxygen flow channel and a tail end fuel nozzle of the outer ring fuel flow channel are both communicated with the combustion chamber body.
Optionally, the plurality of coaxial injection units comprises a central region coaxial injection unit and a plurality of side region coaxial injection units arranged on concentric circles centred on the central region coaxial injection unit.
Optionally, the injector is provided with a plurality of circles of liquid film holes on the injection surface close to the combustor body, and each circle is provided with a plurality of fuel liquid film cooling nozzles.
Optionally, the liquid oxygen nozzle is a straight flow nozzle, the fuel nozzle is a tangential orifice centrifugal nozzle, and the fuel film cooling nozzle is a straight flow nozzle.
Optionally, the coaxial injector unit is in interference fit with a mounting hole on an injection face of the injector;
the fuel liquid collecting ring is connected with the liquid oxygen liquid collecting cavity through a compression flange.
Optionally, a flange is arranged on an end face of the combustion chamber body, and the combustion chamber body is connected with the combustion chamber head in a flange mode.
Optionally, the end face of the flange plate includes a plurality of sealing grooves, and flexible graphite gaskets are installed in the sealing grooves.
Optionally, combustion chamber body portion has multichannel cooling channel along the circumference equipartition, cooling channel follows the length direction setting of combustion chamber body portion, the upper end and the lower extreme of combustion chamber body portion be provided with respectively with the export ring road and the entry ring road of cooling channel export and entry intercommunication, the export of cooling channel with all be connected with the through joint on the entry of cooling channel.
Optionally, the combustion chamber body is provided with a spark plug hole, the spark plug is connected to the spark plug hole, and the spark plug hole is a threaded hole.
Optionally, the combustion chamber body is provided with an island-shaped boss at the position of the spark plug hole, and the spark plug hole is opened in the middle of the island-shaped boss.
The utility model provides a gas generator, which comprises a combustion chamber head, a combustion chamber body, a spark plug and a pipeline joint, wherein the combustion chamber body is connected with the combustion chamber head, the combustion chamber body and the combustion chamber head form a combustion chamber, and the spark plug is arranged on the combustion chamber. Various pipe connectors, pressure measuring connectors and ignition connectors are all standard components and can be assembled with the combustion chamber in a threaded connection mode. The engine is fixedly arranged on the horizontal table-board through a front bracket and a rear bracket.
The combustor head comprises an injector, a fuel liquid collecting ring and a liquid oxygen liquid collecting cavity, the combustor head is machined and formed by adopting a traditional machining process, the injector is made of oxygen-free copper, and the rest parts are made of stainless steel. The fuel liquid collecting ring is arranged at the periphery of the injector, and a fuel inlet pipe joint is arranged on the fuel liquid collecting ring; the liquid oxygen collecting cavity is arranged on the injector, a liquid oxygen inlet pipe joint is arranged on the liquid oxygen collecting cavity, namely, the head part of the combustion chamber is of a two-cavity three-bottom structure, the liquid oxygen collecting cavity is formed between the upper bottom and the insole, a liquid fuel collecting ring is formed between the lower bottom and the insole, the liquid oxygen collecting cavity is arranged above the insole, and the fuel collecting ring is arranged below the liquid oxygen collecting cavity. The lower bottom is a spraying surface, and the spraying surface of the injector is a plane for convenient processing.
The injector comprises a plurality of coaxial injection units, the coaxial injection units comprise a central liquid oxygen flow channel and an outer ring fuel flow channel, the central liquid oxygen flow channel is communicated with a liquid oxygen liquid collecting cavity, the outer ring fuel flow channel is communicated with a fuel liquid collecting ring, and a tail end liquid oxygen nozzle of the central liquid oxygen flow channel and a tail end fuel nozzle of the outer ring fuel flow channel are both communicated with the body part of the combustion chamber. The liquid oxygen nozzle and the fuel nozzle are coaxial injection units, the liquid oxygen nozzle is arranged on the inner ring, the fuel nozzle is arranged on the outer ring, the oxygen-fuel ratio of the injector is offset, the mixing ratio of the oxygen-fuel ratio of the injector is close to the equivalent mixing ratio in the central area, the combustion can be promoted, and the ignition success rate is improved; the mixing ratio of the edge area is far away from the equivalent mixing ratio, the integral average mixing ratio deviates from the equivalent mixing ratio, the gas temperature is limited not to be too high, and the working time can be prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the gasifier head according to one embodiment of the present invention;
FIG. 2 is a sectional view of the gasifier head;
FIG. 3 is a block diagram of the gasifier head;
FIG. 4 is a schematic view of the injector;
FIG. 5 is an enlarged view of a portion of FIG. 1 at A-A;
FIG. 6 is an enlarged view of a portion of FIG. 1 at B-B;
FIG. 7 is a schematic view of the configuration of the body portion of the gasifier.
The drawings are numbered as follows:
the device comprises a liquid oxygen collecting cavity 1, a pressing flange 2, a fuel collecting ring 3, an injector 4, a combustion chamber body part 5, a coaxial injection unit 41, a fuel inlet 42, a liquid oxygen inlet 43, a fuel nozzle 44, a liquid oxygen nozzle 45, a fuel liquid film cooling nozzle 46 and a cooling channel 51.
Detailed Description
The core of the utility model is to provide a gas generator which can improve the ignition success rate.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 7, fig. 1 is a schematic structural view of a gasifier head according to an embodiment of the present invention; FIG. 2 is a sectional view of the gasifier head; FIG. 3 is a block diagram of the gasifier head; FIG. 4 is a schematic view of the injector; FIG. 5 is an enlarged view of a portion of FIG. 1 at A-A; FIG. 6 is an enlarged view of a portion of FIG. 1 at B-B; FIG. 7 is a schematic view of the configuration of the body portion of the gasifier.
In one embodiment, the utility model provides a gas generator comprising a combustion chamber head, a combustion chamber body 5 connected to the combustion chamber head, and a spark plug arranged on the combustion chamber,
the head part of the combustion chamber comprises an injector 4, a fuel liquid collecting ring 3 arranged on the periphery of the injector 4 and a liquid oxygen liquid collecting cavity 1 arranged on the injector 4, wherein a liquid oxygen inlet 43 pipe joint is arranged on the liquid oxygen liquid collecting cavity 1, a fuel inlet 42 pipe joint is arranged on the fuel liquid collecting ring 3,
the injector 4 comprises a plurality of coaxial injection units 41, the coaxial injection units 41 comprise a central liquid oxygen flow channel and an outer ring fuel flow channel, the central liquid oxygen flow channel is communicated with the liquid oxygen liquid collecting cavity 1, the outer ring fuel flow channel is communicated with the fuel liquid collecting ring 3, and a tail end liquid oxygen nozzle 45 of the central liquid oxygen flow channel and a tail end fuel nozzle 44 of the outer ring fuel flow channel are both communicated with the combustion chamber body part 5.
In the structure, the gas generator comprises a combustion chamber head part, a combustion chamber body part 5, a spark plug and a pipeline joint, wherein the combustion chamber body part 5 is connected with the combustion chamber head part, the combustion chamber body part 5 and the combustion chamber head part form a combustion chamber, and the spark plug is arranged on the combustion chamber. Various pipe connectors, pressure measuring connectors and ignition connectors are all standard components and can be assembled with the combustion chamber in a threaded connection mode. The engine is fixedly arranged on the horizontal table-board through a front bracket and a rear bracket.
The combustor head comprises an injector 4, a fuel liquid collecting ring 3 and a liquid oxygen liquid collecting cavity 1, the combustor head is machined and formed by adopting a traditional machining process, the injector 4 is made of oxygen-free copper, and the rest parts are made of stainless steel. The fuel collecting ring 3 is arranged on the periphery of the injector 4, and a fuel inlet 42 pipe joint is arranged on the fuel collecting ring 3; liquid oxygen collecting cavity 1 sets up on injector 4, is equipped with liquid oxygen entry 43 pipe joints on the liquid oxygen collecting cavity 1, that is to say that the combustion chamber head is two chambeies three-bottom structure, forms liquid oxygen collecting cavity 1 between upper base and the insole, forms liquid fuel collecting ring 3 between lower base and the insole, and liquid oxygen collecting cavity 1 is last, and fuel collecting ring 3 is under. The lower bottom is a spraying surface, and the spraying surface of the injector 4 is a plane surface for convenient processing.
The injector 4 comprises a plurality of coaxial injection units 41, the coaxial injection units 41 comprise a central liquid oxygen flow channel and an outer ring fuel flow channel, the central liquid oxygen flow channel is communicated with the liquid oxygen liquid collecting cavity 1, the outer ring fuel flow channel is communicated with the fuel liquid collecting ring 3, and a tail end liquid oxygen nozzle 45 of the central liquid oxygen flow channel and a tail end fuel nozzle 44 of the outer ring fuel flow channel are both communicated with the combustion chamber body part 5.
Specifically, the injector 4 comprises a liquid oxygen nozzle 45, a fuel nozzle 44 and corresponding flow channels and a liquid collecting cavity, the liquid oxygen nozzle 45 and the fuel nozzle 44 are coaxial injection units 41, the liquid oxygen nozzle 45 is arranged at the inner ring, the fuel nozzle 44 is arranged at the outer ring, the oxygen mixing ratio (oxygen-fuel ratio) of the injector 4 is designed in an offset mode, the mixing ratio of the center area is close to the equivalent mixing ratio, combustion can be promoted, and the ignition success rate is improved; the mixing ratio of the edge area is far away from the equivalent mixing ratio, the integral average mixing ratio deviates from the equivalent mixing ratio, the gas temperature is limited not to be too high, and the working time can be prolonged.
It should be noted that, in engineering, the fuel gas generator uses more fuels to combine alcohol/air (oxygen), kerosene/air (oxygen), methane/oxygen, and methane is commonly called natural gas, which is cheap, easy to obtain and low in cost; oxygen is derived from air and is easy to prepare.
The gas generator described above is only a preferred solution, and is not particularly limited thereto, on the basis of which it is possible to make targeted adjustments according to the actual needs, so as to obtain different embodiments, the plurality of coaxial injection units 41 comprising a central coaxial injection unit 41 and a plurality of side coaxial injection units 41, the plurality of side coaxial injection units 41 being arranged on a concentric circle centered on the central coaxial injection unit 41.
In the above structure, the coaxial injection units 41 are arranged in concentric circles, for example, the injector 4 includes 7 coaxial injection units 41, one of which is located in the central area, and the other 6 of which are arranged in a circle of concentric circles, and are located relatively close to the wall surface of the combustion chamber and far from the central axis of the combustion chamber, and the mixing ratio of the central area is close to the equivalent mixing ratio, so that combustion can be promoted and the success rate of ignition can be improved; the integral average mixing ratio deviates from the equivalent mixing ratio, the gas temperature is limited not to be too high, and the working time can be prolonged.
On the basis of the above embodiments, the injector 4 is provided with a plurality of circles of liquid film holes on the injection surface close to the combustion chamber body 5, each circle is provided with a plurality of fuel liquid film cooling nozzles 46, the fuel liquid film cooling nozzles 46 are arranged in the edge area of the coaxial injection unit 41, the fuel liquid film cooling nozzles 46 are arranged in the edge area of the combustion chamber head, the combustion chamber body 5 is provided with a cooling channel 51, and the injection surface of the combustion chamber head and the inner wall surface of the combustion chamber body 5 are thermally protected for a long time by adopting a regeneration-liquid film composite cooling measure, so that the injection surface and the inner wall surface can be protected from being burnt.
Alternatively, the liquid oxygen nozzles 45 are straight flow nozzles, and spray evenly, and the fuel nozzles 44 are tangential orifice centrifugal nozzles, which improves fuel blending efficiency. The injector 4 may also be a direct current impinging nozzle or a single component centrifugal nozzle.
The fuel film cooling nozzle 46 is a straight nozzle and is uniformly cooled.
The flow of each coaxial injection unit 41 is equal, the requirements on the dimensional accuracy and the inner surface finish degree of the tangential hole and the coaxial straight-through hole are high, and a machining mode of drilling first and then reaming is generally adopted.
In a particular embodiment, the liquid oxygen nozzle 45 in each coaxial injection unit 41 has an inner diameter of 2.5 mm. The fuel nozzle 44 swirl chamber inside diameter in each coaxial injector unit 41 was 3.5 mm. The fuel nozzle 44 swirl chamber outer diameter in each coaxial injector unit 41 was 6.76 mm. The fuel nozzle 44 swirl chamber in each coaxial injector unit 41 has a total of 3 tangential inlets with an internal diameter of 1.5 mm. The liquid oxygen and fuel mass flow rates of each coaxial injection unit 41 were 0.1018kg/s and 0.04073 kg/s.
The liquid oxygen and fuel nozzles 44 of each coaxial injector unit 41 are at 90 degrees to the injector face. The fuel film cooling nozzles 46 are axially and uniformly distributed on the injection surface close to the wall surface of the combustion chamber. The fuel film cooling nozzle 46 is a straight nozzle with a single flow of 0.05431kg/s for a total of 18, total mass flow: 2.138kg/s, center region liquid oxygen flow: 0.7128kg/s, center region fuel flow rate: 0.2851kg/s, liquid film flow: 0.9775 kg/s.
On the basis of the above embodiments, the injector 4 has a mounting hole, the coaxial injection unit 41 is in interference fit with the mounting hole on the injection surface of the injector 4, and is detachably connected, and each coaxial injection unit 41 can be replaced independently, so that the modular disassembly is facilitated, the utilization rate is improved, and the cost is reduced.
On the basis of each specific embodiment, the fuel liquid collecting ring 3 and the liquid oxygen liquid collecting cavity 1 are separately processed, so that the structure is simple, and the processing is easy. Fuel liquid collecting ring 3 and liquid oxygen liquid collecting cavity 1 are connected through compressing tightly flange 2, based on the modularization setting to flange joint replaces the welding, conveniently carries out the dismouting, is convenient for replace and maintain each spare part, and is particularly suitable for being used for the ground experiment.
It should be noted that the combustion chamber body part 5 is processed by a metal additive manufacturing technology (commonly called 3D printing), and is pulverized by unidirectional variable speed powder laying by a Selective Laser Melting (SLM) technology. The processing material can be high-temperature alloy, such as GH-3536 nickel-based high-temperature alloy, is suitable for high-temperature parts of a combustion chamber of an engine, can be used for a long time at the temperature of less than 900 ℃, can reach 1080 ℃ in a short time, and has good hot-working formability and weldability.
After the 3D printing process of the combustion chamber body 5 is completed, each mechanical interface is subjected to fine dimensional control through a conventional machining process. The combustion chamber body part 5 that 3D printed is the integral piece, and the terminal surface of combustion chamber body part 5 has the ring flange, and combustion chamber body part 5 passes through flange and bolted connection with the combustion chamber head, can dismantle the connection, and it is convenient to connect, easily changes the maintenance, whole modular design, and life is longer.
On the basis of each above-mentioned concrete embodiment, the terminal surface of ring flange contains a plurality of seal grooves, for example contain twice seal groove, installs flexible graphite packing ring in the seal groove, seals with flexible graphite packing ring, can prevent effectively that high temperature gas from revealing.
On the basis of each above-mentioned specific embodiment, the combustion chamber body portion 5 has multichannel cooling channel 51 along the circumference equipartition, and cooling channel 51 sets up along the length direction of combustion chamber body portion 5, can cool off the whole length direction of combustion chamber body portion 5, and the cooling distance is longer, and the cooling effect is better.
In a specific embodiment, the total length of the combustion chamber is 300mm, the diameter of the circular straight section is 67.8mm, the cooling passages 51 can be designed into a rectangular channel structure, and the number n of the cooling passages 51 is 60, and the cooling passages are uniformly distributed along the circumferential direction. As shown. The height h of the cooling channel 51 is 4.41mm, the width w is 1mm, the cooling channel keeps constant along the process, the cooling is more uniform, and the local temperature is prevented from being overhigh.
The upper end and the lower end of the combustion chamber body part 5 are respectively provided with an outlet loop and an inlet loop, the outlet loop and the inlet loop are respectively provided with an outlet and an inlet of the cooling channel 51 and are connected with a straight joint, specifically a 37-degree straight joint, is good in sealing performance, can be effectively sealed by a red copper gasket when necessary, and ensures that the inlet and the outlet of the cooling channel 51 are not easy to leak.
Alternatively, the cooling channel 51 is connected to the combustion chamber body 5 by welding, and the nominal diameter of the through joint may be DN 6. The coolant is low-temperature liquid methane.
In addition to the above embodiments, the spark plug is mounted on the combustion chamber body 5 because the combustion chamber head has a small diameter and a relatively complex and compact structure, and the ignition spark plug cannot be mounted.
The combustion chamber body part 5 is provided with a spark plug hole, the spark plug is connected to the spark plug hole, and the high-energy aviation spark plug is adopted for ignition, so that the ignition is simple and reliable. The ignition is carried out on the combustion chamber body part 5, the ignition stroke is short, the energy loss of the ignition source is small, and the energy loss of the ignition source of the spark plug is reduced.
Optionally, the spark plug hole is a threaded hole, the joint of the spark plug is provided with an external thread, and the spark plug is in threaded connection with the spark plug hole, for example, the combustion chamber body part 5 is provided with an M14 threaded hole, and an M14 aviation spark plug is adopted for ignition, so that the connection is convenient and the disassembly is convenient.
Of course, the installation of the spark plug in the body 5 of the combustion chamber is a preferred embodiment and is not exclusive, and it is also possible to use a torch-type igniter for ignition in the head of the combustion chamber, the igniter being installed coaxially with the gas generator body.
On the basis of the above embodiments, the combustion chamber body 5 is provided with an island-shaped boss at the position of the spark plug hole, the spark plug hole is opened at the middle position of the island-shaped boss, and the spark passes through the cooling channel 51 through the island-shaped boss and enters the combustion chamber to generate high temperature to ignite the fuel.
Specifically, the island-type boss structure has symmetry, the upstream is parabolic, the downstream is circular, and the middle is a spark plug hole, so that the consistency of the coolant flow of each cooling channel 51 can be improved, the pressure loss of the coolant flowing through the island-type boss structure is reduced, the uniform distribution of the downstream flow is ensured, and the influence of the island-type boss structure on the coolant flow is reduced to the minimum.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The gas generator provided by the present invention has been described in detail. The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A gas generator, characterized in that it comprises a combustion chamber head, a combustion chamber body (5) connected to said combustion chamber head and a spark plug arranged on the combustion chamber,
the combustion chamber head comprises an injector (4), a fuel collecting ring (3) arranged on the periphery of the injector (4) and a liquid oxygen collecting cavity (1) arranged on the injector (4), wherein a liquid oxygen inlet (43) pipe joint is arranged on the liquid oxygen collecting cavity (1), a fuel inlet (42) pipe joint is arranged on the fuel collecting ring (3),
the injector (4) comprises a plurality of coaxial injection units (41), the coaxial injection units (41) comprise a central liquid oxygen flow channel and an outer ring fuel flow channel, the central liquid oxygen flow channel is communicated with the liquid oxygen liquid collecting cavity (1), the outer ring fuel flow channel is communicated with the fuel liquid collecting ring (3), and a tail end liquid oxygen nozzle (45) of the central liquid oxygen flow channel and a tail end fuel nozzle (44) of the outer ring fuel flow channel are both communicated with the combustion chamber body part (5).
2. Gas generator according to claim 1, characterized in that said plurality of coaxial injection units (41) comprises one central coaxial injection unit (41) and a plurality of side coaxial injection units (41), said plurality of side coaxial injection units (41) being arranged on concentric circles centred on said central coaxial injection unit (41).
3. Gas generator according to claim 2, characterized in that the injector (4) is provided with a plurality of liquid film holes on the injection face close to the shaft (5), each ring having a plurality of fuel film cooling nozzles (46).
4. The gas generator as claimed in claim 3, characterized in that the liquid oxygen nozzles (45) are straight nozzles, the fuel nozzles (44) are tangential orifice centrifugal nozzles and the liquid fuel film cooling nozzles (46) are straight nozzles.
5. The gas generator according to claim 2, characterized in that the coaxial injector unit (41) is in interference fit with a mounting hole on the injection face of the injector (4);
the fuel collecting ring (3) is connected with the liquid oxygen collecting cavity (1) through a compression flange (2).
6. Gas generator as claimed in any one of claims 1 to 5, characterized in that the end face of the body (5) has a flange, the body (5) being flanged to the head.
7. The gasifier as claimed in claim 6, wherein the end face of the flange includes a plurality of sealing grooves having flexible graphite gaskets mounted therein.
8. The gas generator as claimed in claim 6, characterized in that a plurality of cooling channels (51) are distributed on the combustion chamber body (5) along the circumferential direction, the cooling channels (51) are arranged along the length direction of the combustion chamber body (5), the upper end and the lower end of the combustion chamber body (5) are respectively provided with an outlet loop and an inlet loop which are communicated with the outlet and the inlet of the cooling channel (51), and the outlet of the cooling channel (51) and the inlet of the cooling channel (51) are connected with a through joint.
9. Gas generator according to claim 6, characterized in that the combustion chamber body (5) is provided with a spark plug hole, to which the spark plug is connected, the spark plug hole being a threaded hole.
10. Gas generator according to claim 9, characterized in that the combustion chamber body (5) is provided with an island-like boss at the location of the spark plug hole, which opens in the middle of the island-like boss.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220040843.4U CN216518320U (en) | 2022-01-06 | 2022-01-06 | Gas generator |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220040843.4U CN216518320U (en) | 2022-01-06 | 2022-01-06 | Gas generator |
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| CN216518320U true CN216518320U (en) | 2022-05-13 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320665A (en) * | 2022-01-06 | 2022-04-12 | 中南大学 | Gas generator |
| CN115726905A (en) * | 2022-11-16 | 2023-03-03 | 陕西星辰航线科技有限公司 | Torch type igniter for liquid oxygen and kerosene |
| CN115949531A (en) * | 2023-03-09 | 2023-04-11 | 中国空气动力研究与发展中心空天技术研究所 | Injector with wide range and continuous adjustment |
-
2022
- 2022-01-06 CN CN202220040843.4U patent/CN216518320U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320665A (en) * | 2022-01-06 | 2022-04-12 | 中南大学 | Gas generator |
| CN115726905A (en) * | 2022-11-16 | 2023-03-03 | 陕西星辰航线科技有限公司 | Torch type igniter for liquid oxygen and kerosene |
| CN115726905B (en) * | 2022-11-16 | 2024-06-11 | 青岛星辰航线科技有限公司 | Liquid oxygen and kerosene torch type igniter |
| CN115949531A (en) * | 2023-03-09 | 2023-04-11 | 中国空气动力研究与发展中心空天技术研究所 | Injector with wide range and continuous adjustment |
| CN115949531B (en) * | 2023-03-09 | 2023-05-09 | 中国空气动力研究与发展中心空天技术研究所 | Wide range continuous adjustable injector |
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