CN111486022A - Anti-backfire device and combustion system - Google Patents
Anti-backfire device and combustion system Download PDFInfo
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- CN111486022A CN111486022A CN202010312051.3A CN202010312051A CN111486022A CN 111486022 A CN111486022 A CN 111486022A CN 202010312051 A CN202010312051 A CN 202010312051A CN 111486022 A CN111486022 A CN 111486022A
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- moving core
- backfire
- medium
- medium inlet
- sealing part
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
- F02K9/60—Constructional parts; Details not otherwise provided for
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02K—JET-PROPULSION PLANTS
- F02K9/00—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof
- F02K9/42—Rocket-engine plants, i.e. plants carrying both fuel and oxidant therefor; Control thereof using liquid or gaseous propellants
- F02K9/60—Constructional parts; Details not otherwise provided for
- F02K9/62—Combustion or thrust chambers
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- Combustion & Propulsion (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The present disclosure provides an anti-backfire device and a combustion system, the anti-backfire device comprising: the device comprises a shell, a moving core and an elastic piece, wherein a cavity is arranged in the shell, a medium inlet and a medium outlet which are communicated with the cavity are formed in the shell, and a first sealing part is arranged on the inner wall of the cavity and surrounds the medium inlet; the moving core is movably arranged in the cavity, the first end of the moving core is opposite to the medium inlet, a ring groove is formed in the position, close to the first end, of the moving core along the circumferential direction, so that an annular flange is formed at the first end, and a second sealing part is arranged at the position, opposite to the first sealing part, of the annular flange; the elastic piece is used for applying elasticity to the moving core, so that the moving core can move towards the medium inlet under the action of the elasticity, and the first sealing part is attached to the second sealing part to seal the medium inlet. The anti-backfire device disclosed by the embodiment of the disclosure still has good sealing performance under a high-temperature and high-pressure environment.
Description
Technical Field
The disclosure relates to the technical field of combustion systems, in particular to an anti-backfire device and a combustion system using the same.
Background
The liquid rocket engine is a chemical rocket engine using liquid chemical substances as energy sources and working media. The aircraft carries the liquid propellant itself, burns or decomposes in the thrust chamber of the engine, the gas generator, etc., converting the chemical energy of the propellant into kinetic energy, which is ejected from the nozzle at a high flow rate, thereby generating power.
In the rocket working process, the temperature of high-temperature fuel gas generated in the combustion device is often over 1000K, and the high-temperature fuel gas has extremely high pressure. The medium pipelines communicated with pipelines of combustion devices such as a fuel gas generator, a turbine, a thrust chamber and the like of an engine need to consider that high-temperature and high-pressure fuel gas reversely passes through related pipelines, so that the pipelines are prevented from deforming and bursting due to high-temperature thermal stress, and the occurrence of failure of related accessories in an auxiliary medium supply system is avoided. This requires a type of venting and flashback arrestor. When the combustion device of the engine does not carry out combustion reaction or the temperature of hot air flow generated by the combustion reaction is not high and the pressure is low, the auxiliary medium system is allowed to introduce a medium into the combustion device through the medium pipeline. When the engine combustion device reaches or approaches the designed rated working condition, the temperature of hot air flow is high, and usually exceeds 1000K; the hot gas stream pressure is high, typically close to the combustion chamber pressure. The high-temperature high-pressure fuel gas and the auxiliary working medium supply pipeline must be blocked, so that the high-temperature high-pressure working medium is prevented from damaging the low-pressure low-temperature design system. However, the moving core of the existing anti-backfire device is easy to warp due to uneven heating under the action of high temperature, and the warped moving core and the sealing surface on the shell are easy to have the problem of untight attachment, so that the sealing performance of the anti-backfire device applied to a high-temperature combustion device is poor.
Disclosure of Invention
In view of the above problems in the prior art, the present disclosure provides an anti-backfire device with good sealing performance and a combustion system using the same.
To achieve the above object, the present disclosure provides an anti-backfire apparatus, comprising:
the device comprises a shell, a first sealing part and a second sealing part, wherein a cavity is formed in the shell, a medium inlet and a medium outlet which are communicated with the cavity are formed in the shell, and the inner wall of the cavity is provided with the first sealing part around the medium inlet;
the moving core is movably arranged in the cavity, the first end of the moving core is opposite to the medium inlet, a ring groove is formed in the moving core at a position close to the first end along the circumferential direction, so that an annular flange is formed at the first end, and a second sealing part is arranged at a position, opposite to the first sealing part, of the annular flange;
and an elastic member for applying an elastic force to the moving core, allowing the moving core to move toward the medium inlet under the elastic force, and allowing the first sealing portion and the second sealing portion to be attached to seal the medium inlet.
In some embodiments, the groove wall of the ring groove close to the second sealing portion is parallel to the plane of the second sealing portion.
In some embodiments, the groove wall of the ring groove away from the second sealing portion is inclined away from the first end to form a first conical flow guide portion.
In some embodiments, the groove bottom of the ring groove is curved.
In some embodiments, a second conical flow guide part is convexly arranged in the middle of the end surface of the first end.
In some embodiments, a seat body fixedly connected with the housing is disposed in the middle of the chamber, a guide hole is disposed on the seat body, the moving core is movably connected in the guide hole, and a gap is formed between the moving core and the guide hole, so that the moving core can swing within a preset angle range in the axial direction of the guide hole.
In some embodiments, an annular boss is provided on an inner wall of the chamber around the media inlet, a land of the annular boss forming the first seal.
The embodiment of the present disclosure further provides a combustion system, which includes a combustion device and an auxiliary medium system, and further includes the above-mentioned anti-backfire device, and the auxiliary medium system is connected to the combustion device through the anti-backfire device.
In some embodiments, the combustion device comprises a rocket thrust chamber, and the secondary media system is connected to the rocket thrust chamber through the flashback arresting device.
In some embodiments, the combustion device comprises a gas generator, a turbine and a charge pump, the charge pump is connected with the gas generator through a propellant conveying pipeline, the turbine is in transmission connection with the charge pump, and the auxiliary medium system is connected with the turbine through the anti-backfire device.
Compared with the prior art, the anti-backfire device disclosed by the embodiment of the disclosure is characterized in that a ring groove is formed in the position, close to the first end, of the moving core along the circumferential direction, so that an annular flange is formed at the first end, and a second sealing portion is arranged at the position, opposite to the first sealing portion, of the annular flange. When the combustion device starts to react and burn, hot air flow in the combustion device can enter the cavity and flow into the annular groove of the moving core, when pressure is applied to the moving core, heat can be uniformly conducted to the annular flange, the annular flange is uniformly heated and is uniformly deformed by heat, the annular flange is prevented from warping, the flatness of the second sealing part under a high-temperature and high-pressure environment is ensured, under the dual actions of pressure applied by hot air flow in the combustion device and elasticity applied by the elastic piece, the moving core can rapidly move towards the medium inlet, so that the second sealing part is tightly attached to the first sealing part to seal the medium inlet, and the anti-backfire device still has good sealing performance under the high-temperature and high-pressure environment.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
This disclosure provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology.
Drawings
In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. Like reference numerals having letter suffixes or different letter suffixes may represent different instances of similar components. The drawings illustrate various embodiments generally by way of example and not by way of limitation, and together with the description and claims serve to explain the disclosed embodiments. The same reference numbers will be used throughout the drawings to refer to the same or like parts, where appropriate. Such embodiments are illustrative, and are not intended to be exhaustive or exclusive embodiments of the present apparatus or method.
Fig. 1 is a schematic structural view of an anti-backfire device according to an embodiment of the present disclosure;
FIG. 2 is an enlarged schematic view of portion A of the flashback arrestor of FIG. 1;
FIG. 3 is a schematic block diagram of an embodiment of a combustion system according to an embodiment of the present disclosure;
FIG. 4 is a schematic structural diagram of another embodiment of a combustion system according to an embodiment of the present disclosure.
Reference numerals:
100-an anti-backfire device;
110-a housing; 111-a first housing; 112-a second housing; 113-a chamber; 114-a media inlet; 115-a media outlet; 116-a first seal; 117-a sealing gasket; 118-an annular boss; 119-seat body;
120-a motion core; 121-ring groove; 122-an annular flange; 123-a second seal; 124-a first conical flow guide; 125-second conical flow guide; 126-a mandrel section; 127-core head;
130-an elastic member;
200-a combustion device; 210-rocket thrust chamber; 220-a gas generator; 230-a turbine; 240-filling pump;
300-an auxiliary media system; 310-ball joint.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be described below clearly and completely with reference to the accompanying drawings of the embodiments of the present disclosure. It is to be understood that the described embodiments are only a few embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the disclosure without any inventive step, are within the scope of protection of the disclosure.
Unless otherwise defined, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this disclosure belongs. The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
To maintain the following description of the embodiments of the present disclosure clear and concise, a detailed description of known functions and known components have been omitted from the present disclosure.
Referring to fig. 1 and 2, an embodiment of the present disclosure provides an anti-backfire apparatus 100, which includes: the device comprises a shell 110, a moving core 120 and an elastic piece 130, wherein a cavity 113 is arranged in the shell 110, a medium inlet 114 and a medium outlet 115 which are communicated with the cavity 113 are arranged on the shell 110, and a first sealing part 116 is arranged on the inner wall of the cavity 113 and surrounds the medium inlet 114; the moving core 120 is movably disposed in the chamber 113, the moving core 120 may have a first end and a second end opposite to each other, the first end may be opposite to the medium inlet 114, a ring groove 121 is circumferentially opened on the moving core 120 at a position close to the first end to form an annular flange 122 at the first end, and a second sealing portion 123 is disposed at a position of the annular flange 122 opposite to the first sealing portion 116; the elastic member 130 serves to apply elastic force to the moving core 120.
Taking the application in a combustion system comprising a combustion device and an auxiliary medium system as an example, in actual use, the medium inlet 114 may be connected to the auxiliary medium system and the medium outlet 115 may be connected to the combustion device. In the non-operating state, the moving core 120 can move toward the medium inlet 114 by the elastic force applied by the elastic member 130, and the first sealing portion 116 and the second sealing portion 123 are attached to seal the medium inlet 114. In the initial working state, the medium system conveys auxiliary medium to the combustion device through the anti-backfire device, under the action of pressure applied by the auxiliary medium system, the moving core 120 can overcome the elastic force applied by the elastic element 130 to move towards the direction away from the medium inlet 114, the first sealing part 116 is separated from the second sealing part 123, the auxiliary medium enters the chamber 113 and flows into the combustion device from the medium outlet 115, and the starting ignition of the combustion device is assisted. When the combustion device starts to react and combust and gradually reaches the designed rated working state, the interior of the combustion device gradually changes into a high-temperature and high-pressure state, and the auxiliary medium system cuts off the supply of the auxiliary medium, the hot air in the combustion device can flow into the ring groove 121 of the moving core 120, and when the pressure is applied to the moving core 120, heat can be uniformly conducted to the annular flange 122, so that the annular flange 122 is uniformly heated and is uniformly thermally deformed, the annular flange 122 is prevented from being warped, the flatness of the second sealing part 123 in a high-temperature and high-pressure environment is ensured, under the dual action of the pressure exerted by the hot air flow in the combustion device and the elastic force exerted by the elastic member 130, the moving core 120 can rapidly move towards the medium inlet 114, so that the second sealing portion 123 is tightly attached to the first sealing portion 116 and seals the medium inlet 114, and the anti-backfire device still has good sealing performance in a high-temperature and high-pressure environment. It should be noted that the flashback arrestor is not limited to use in combustion systems that include a combustion apparatus and an auxiliary medium system.
In some embodiments, the groove wall of the ring groove 121 adjacent to the second sealing portion 123 is parallel to the plane of the second sealing portion 123. For example, when the moving core 120 is a regular workpiece having an axis, the groove wall of the ring groove 121 close to the second sealing portion 123 may be configured to be perpendicular to the axis of the moving core 120, and the plane of the second sealing surface may also be configured to be perpendicular to the axis of the moving core 120, so that the thickness of the formed annular flange 122 is the same, and after the hot air flows into the ring groove 121, the annular flange 122 is heated uniformly, so as to further prevent the annular flange 122 from warping, and further improve the sealing performance of the anti-backfire device. In specific implementation, the thickness of the annular flange 122 can be determined through design calculation, so that the requirement of local structural strength is met, and meanwhile, a certain thermal deformation allowance is provided, so that the reliability of the moving core 120 in a high-temperature and high-pressure environment is ensured, and the service life of the anti-backfire device is prolonged.
In some embodiments, the groove 121 slopes away from the groove wall of the second sealing portion 123 in a direction away from the first end to form a first tapered flow guide 124. Still taking the moving core 120 as a regular workpiece with an axial center as an example, the groove wall of the ring groove 121 far from the second sealing portion 123 can be inclined towards the second end direction, so as to form a first conical diversion portion 124 on the side of the annular flange 122 back to the medium inlet 114, when the combustion device starts to burn, the hot air flow can smoothly flow into the ring groove 121 along the first conical diversion portion 124, so that the annular flange 122 is uniformly heated, the turbulence phenomenon when the hot air flow flows into the ring groove 121 can be reduced, and the phenomenon that the annular flange 122 is heated unevenly can be avoided.
In some embodiments, the groove bottom of the ring groove 121 may be curved. Specifically, the cross-sectional shape of the groove bottom of the ring groove 121 may be semicircular, one side of the semicircular groove bottom may be connected to the annular flange 122, and the other side may be connected to the first conical diversion portion 124, so that the cross-sectional shape of the ring groove 121 is continuous and smooth and has no edges and corners, thereby further avoiding uneven heating of the annular flange 122 due to uneven flow of hot air in the ring groove 121, and facilitating production and processing.
In some embodiments, a second conical flow guide 125 is embossed in the middle of the end face of the first end of the moving core 120. That is, the second conical flow guide portion 125 is disposed at the middle of the end surface of the first end, and the second sealing portion 123 is disposed around the second conical flow guide portion 125. When the auxiliary medium system delivers the auxiliary medium to the combustion device through the backfire arrester, the second conical flow guide 125 can divide the medium flow into an umbrella shape, so that the medium flow can uniformly flow into the chamber 113 along the periphery of the moving core 120.
In some embodiments, the housing 110 may include a first housing 111 and a second housing 112, one end of the first housing 111 is provided with a medium outlet 115, the other end of the first housing 111 is provided with an external thread structure, one end of the second housing 112 is provided with an internal thread structure, and the other end of the second housing 112 is provided with a medium inlet 114. When assembled, the first and second housings 111 and 112 are threadedly coupled by means of external and internal thread structures to form a chamber 113 and to form oppositely disposed media inlets 114 and outlets 115. To improve the sealing performance of the housing 110, a sealing gasket 117 may be further disposed between the first housing 111 and the second housing 112.
In some embodiments, an annular boss 118 may be provided on the inner wall of the chamber 113 around the media inlet 114, and the first seal 116 is formed by the land of the annular boss 118. Therefore, the first sealing part 116 can be polished by precision polishing equipment during production, processing and manufacturing so as to ensure that the first sealing part 116 has higher flatness and further improve the sealing performance of the anti-backfire device. Specifically, the first sealing portion 116 and the second sealing portion 123 can be processed by adopting an abrasive material lapping process, the processed first sealing portion 116 and the processed second sealing portion 123 form a mirror-like effect, and the flatness and the roughness can meet the high-precision requirement, so that the first sealing portion 116 and the second sealing portion 123 are tightly attached, and the sealing performance of the anti-backfire device is improved.
In some embodiments, the cavity 113 is provided with a seat 119 fixedly connected to the housing 110 at a middle portion thereof, the seat 119 is provided with a guide hole, and in particular, the seat 119 may be provided at a middle portion of the first housing 111 and connected to the first housing 111 by, for example, a connection rib.
In some embodiments, the sports core 120 may include a core shaft 126 and a core head 127 disposed at one end of the core shaft 126, the core head 127 may have a diameter greater than the diameter of the core shaft 126, and the core head 127 is disposed proximate the media inlet 114. Thus, the end of the core head 127 distal from the core shaft 126 forms a first end of the moving core 120, and the end of the core shaft 126 distal from the core head 127 forms a second end of the moving core 120, and the moving core 120 is movably coupled within the guide hole by the core shaft 126. A circumferential groove 121 is formed in the core nose 127 at a location remote from the core shaft 126, thereby forming an annular flange 122 at an end of the core nose 127 remote from the core shaft 126. Of course, the moving core 120 is not limited to the above-described structure.
In some embodiments, the moving core 120 has a gap with the guide hole to allow the moving core 120 to swing within a preset angle range of the axial direction of the guide hole, which may be, for example, 3 ° to 5 °. After combustion, the combustion device has higher temperature and higher pressure, and hot gas flow is distributed on the moving core 120 in the circumferential direction possibly unevenly when flowing, so that the force applied to the moving core 120 in the circumferential direction is unbalanced, the moving core 120 is configured to swing within the axial preset angle range of the guide hole, the moving core 120 can be prevented from being clamped due to unbalanced force, the moving core 120 can realize automatic alignment in the swinging process, and the reliability of the anti-backfire device is improved.
In some embodiments, the elastic member 130 may be a spring, the spring may be sleeved on the core rod portion 126, one end of the spring may abut against the seat body 119, and the other end of the spring may abut against the core head portion 127, and the spring may be configured to be in a compressed state. In this way, the spring can apply an elastic force to the moving core 120 toward the medium inlet 114, so that the moving core 120 has a tendency to move toward the medium inlet 114 to maintain sealability when the first sealing portion 116 and the second sealing portion 123 are attached. During specific implementation, the self deviation of the spring can be compensated by adjusting the verticality and the parallelism deviation of the spring, and the problem of unstable movement of the moving core 120 caused by uneven distribution of hot air flow in the circumferential direction of the moving core 120 can be corrected.
In specific implementation, the housing 110 and the moving core 120 of the anti-backfire device can be both manufactured by using 3D printing technology, and the integrally formed structure makes the anti-backfire device smaller and more compact. In addition, the shell 110 and the moving core 120 can both adopt nickel-based high-temperature alloy, the nickel-based alloy has good high-temperature resistance, corrosion resistance and oxidation resistance, and the linear expansion coefficient after thermal shock is lower than that of common austenitic stainless steel alloy, so that the shell is suitable for the use working condition of high-temperature and high-pressure gas. Tests prove that the action rate of the anti-backfire device can reach less than 100ms, the action consistency is higher, the leakage rate can be 0 bubble/3 min under the normal temperature condition under the set pressure of the connected combustion device, and no obvious floating smoke and no obvious condensate water overflow can be realized under the high-temperature saturated integral condition.
Referring to fig. 3, an embodiment of the present disclosure further provides a combustion system, which includes a combustion apparatus 200, an auxiliary medium system 300, and the anti-backfire apparatus 100 according to any of the above embodiments, wherein the auxiliary medium system 300 is connected to the combustion apparatus 200 through the anti-backfire apparatus 100. Because the anti-backfire device 100 has better sealing performance, hot air in the combustion device 200 can be effectively prevented from entering and damaging the low-pressure auxiliary medium system 300, and the combustion device 200 has higher safety. In practice, the auxiliary medium supply line connected to the combustion device 200 and the auxiliary medium system 300 may be connected to the flashback arrestor 100 via a ball joint 310 as shown in fig. 1, or may be connected to the flashback arrestor 100 via another type of connection joint, or may be welded to the flashback arrestor.
Referring to fig. 3, in some embodiments, the combustion apparatus 200 includes a gas generator 220, a turbine 230, and a charge pump 240, the charge pump 240 is connected to the gas generator 220 through a propellant transfer pipe, the turbine 230 is drivingly connected to the charge pump 240, and the auxiliary medium system 300 is connected to the turbine 230 through the anti-backfire apparatus 100. When the combustion of the gas generator 220 is not started, the auxiliary medium system 300 can deliver high-pressure large-flow auxiliary medium to the turbine 230 through the backfire preventing device 100 so as to perform short-time forward purging on the turbine 230, force the turbine 230 to start rotating, drive the filling pump 240 to fill propellant into the gas generator 220, and ensure that the combustion system can rapidly enter a rated working condition after a 0-second time sequence.
The auxiliary medium system 300 rapidly cuts off the supply of the auxiliary medium when the gas generator 220 starts reactive combustion and gradually enters a designed rated operating state. The high-temperature and high-pressure hot air flows into the cavity 113 of the anti-backfire device 100 and the ring groove 121 on the moving core 120 rapidly, and the moving core 120 moves toward the medium inlet 114 rapidly under the dual actions of pressure and elasticity, so that the first sealing portion 116 and the second sealing portion 123 are tightly attached to seal the medium inlet 114, thereby preventing the hot air in the turbine 230 from entering the low-pressure auxiliary medium system 300 and preventing the auxiliary medium system 300 from being damaged.
Referring to FIG. 4, in some embodiments, the combustion device 200 includes a rocket thrust chamber 210, and the secondary media system 300 is coupled to the rocket thrust chamber 210 via the anti-backfire apparatus 100. When the rocket thrust chamber 210 does not perform combustion work, the auxiliary medium system 300 provides a small-flow auxiliary gas medium to blow off the cavity channel of the rocket thrust chamber 210, so that micro-positive pressure is formed in the cavity channel, external water vapor impurities are effectively prevented from entering the cavity channel, and the rocket thrust chamber 210 can safely enter a normal combustion working condition.
When the rocket thrust chamber 210 starts reactive combustion and gradually enters a designed rated working state, the auxiliary medium system 300 quickly cuts off the supply of the auxiliary medium. The high-temperature and high-pressure hot air flows into the cavity 113 of the anti-backfire device 100 and the ring groove 121 on the moving core 120 rapidly, the moving core 120 moves toward the medium inlet 114 rapidly under the dual action of pressure and elasticity, so that the first sealing portion 116 and the second sealing portion 123 are tightly attached to seal the medium inlet 114, thereby preventing the hot air of the combustion device 200 from entering the low-pressure auxiliary medium system 300 and preventing the auxiliary medium system 300 from being damaged.
The above description is intended to be illustrative and not restrictive. For example, the above-described examples (or one or more versions thereof) may be used in combination with each other. For example, other embodiments may be used by those of ordinary skill in the art upon reading the above description. In addition, in the foregoing detailed description, various features may be grouped together to streamline the disclosure. This should not be interpreted as an intention that a disclosed feature not claimed is essential to any claim. Rather, the subject matter of the present disclosure may lie in less than all features of a particular disclosed embodiment. Thus, the following claims are hereby incorporated into the detailed description as examples or embodiments, with each claim standing on its own as a separate embodiment, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations. The scope of the disclosure should be determined with reference to the appended claims, along with the full scope of equivalents to which such claims are entitled.
The above embodiments are merely exemplary embodiments of the present disclosure, which is not intended to limit the present disclosure, and the scope of the present disclosure is defined by the claims. Various modifications and equivalents of the disclosure may occur to those skilled in the art within the spirit and scope of the disclosure, and such modifications and equivalents are considered to be within the scope of the disclosure.
Claims (10)
1. An anti-backfire apparatus, comprising:
the device comprises a shell, a first sealing part and a second sealing part, wherein a cavity is formed in the shell, a medium inlet and a medium outlet which are communicated with the cavity are formed in the shell, and the inner wall of the cavity is provided with the first sealing part around the medium inlet;
the moving core is movably arranged in the cavity, the first end of the moving core is opposite to the medium inlet, a ring groove is formed in the moving core at a position close to the first end along the circumferential direction, so that an annular flange is formed at the first end, and a second sealing part is arranged at a position, opposite to the first sealing part, of the annular flange;
and an elastic member for applying an elastic force to the moving core, allowing the moving core to move toward the medium inlet under the elastic force, and allowing the first sealing portion and the second sealing portion to be attached to seal the medium inlet.
2. The flashback arrestor of claim 1, wherein the groove wall of the ring groove adjacent to the second sealing portion is parallel to the plane of the second sealing portion.
3. The flashback arrestor of claim 1, wherein the groove wall of the ring groove remote from the second sealing portion slopes in a direction away from the first end to form a first tapered flow guide.
4. The flashback arrestor of claim 1, wherein the groove bottom of the ring groove is curved.
5. The flashback arrestor of claim 1, wherein a second conical flow guide is convexly disposed at a middle portion of the end face of the first end.
6. The backfire arrester as claimed in claim 1, wherein a seat body fixedly connected to the housing is provided at a middle portion of the chamber, a guide hole is provided on the seat body, the moving core is movably connected to the guide hole, and a gap is provided between the moving core and the guide hole, so that the moving core can swing within a preset angular range in an axial direction of the guide hole.
7. The flashback arrestor of claim 1, wherein an annular boss is provided on an inner wall of the chamber surrounding the media inlet, a land of the annular boss forming the first seal.
8. A combustion system comprising a combustion device and an auxiliary medium system, characterized in that it further comprises an anti-backfire arrangement as claimed in any one of claims 1-7, said auxiliary medium system being connected to said combustion device via said anti-backfire arrangement.
9. The combustion system of claim 8, wherein the combustion device comprises a rocket thrust chamber, and the auxiliary media system is connected to the rocket thrust chamber through the anti-backfire device.
10. The combustion system of claim 8, wherein the combustion device comprises a gas generator, a turbine and a charge pump, the charge pump is connected to the gas generator via a propellant feed line, the turbine is drivingly connected to the charge pump, and the auxiliary medium system is connected to the turbine via the flashback arrestor.
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| CN202010312051.3A CN111486022B (en) | 2020-04-20 | 2020-04-20 | Anti-backfire device and combustion system |
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| CN202010312051.3A CN111486022B (en) | 2020-04-20 | 2020-04-20 | Anti-backfire device and combustion system |
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| US2916046A (en) * | 1956-06-20 | 1959-12-08 | Clement J Turansky | Chatter-free check valve |
| US6250602B1 (en) * | 1999-01-18 | 2001-06-26 | Jansen's Aircraft Systems Controls, Inc. | Positive shut-off metering valve with axial thread drive |
| CN104791133A (en) * | 2015-03-17 | 2015-07-22 | 南京理工大学 | Automatic anti-backfire device for pasty propellant rocket motor |
| CN105020053A (en) * | 2015-07-17 | 2015-11-04 | 南京理工大学 | Anti-backfire device for mechanical pasty propellant rocket engine |
| CN105065139A (en) * | 2015-07-17 | 2015-11-18 | 南京理工大学 | Motor-driven anti-backfire device for pasty propellant gas generator |
| CN205977460U (en) * | 2016-08-02 | 2017-02-22 | 袁逸凡 | Rocket engine of anti -backfire |
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| CN111486022B (en) | 2021-07-23 |
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