Double-click injector and steam generator

Abstract

The invention provides a double-click injector and a steam generator, relates to the technical field of injectors, and solves the technical problems that the mixing effect of alcohol and liquid oxygen is difficult to guarantee, and the atomization effect is poor. The double-click type injector comprises an injector body, first medium chambers and second medium chambers are arranged in the injector body, the first medium chambers and the second medium chambers are annular chambers and are sequentially and alternately arranged at intervals around the central axis of the injector body, the first medium chambers are communicated with first nozzles, and the second medium chambers are communicated with second nozzles; the first nozzles and the second nozzles are obliquely arranged relative to the central axis of the injector body, and the distance between the adjacent first nozzles and second nozzles is gradually reduced in the direction away from the first medium cavity or the second medium cavity. The atomization effect can be improved, and fuel gas which is stable in pressure, uniform in mixing and good in atomization is formed.

Description

Technical Field

[0001] The present invention relates to the technical field of injectors, and in particular to a double-click injector and a steam generator. Background Art

[0002] When the high-altitude engine is tested on the ground, it is usually necessary to place the engine in a vacuum chamber, and use a vacuum ejector to keep the nozzle outlet in a low-pressure state during the operation of the engine in the vacuum chamber to ensure full flow of the nozzle. Liquid oxygen alcohol steam generators have the advantages of high steam pressure and cheap medium, so liquid oxygen alcohol steam generators are often used as necessary equipment for high-model test evacuation of aerospace engines.

[0003] The steam generator includes an injector and a combustion chamber. The main function of the injector is to inject propellant into the combustion chamber. The nozzle is the basic component of the injector. The nozzle is responsible for ejecting a certain mass flow of propellant from the liquid collecting chamber into the combustion chamber, where it is atomized, evaporated, mixed and burned to ensure the safety and stability of combustion. At present, the injectors used in liquid oxygen alcohol steam generators generally use direct current injectors.

[0004] The applicant has found that the prior art has at least the following technical problems: the liquid oxygen alcohol steam injector needs to fully mix the alcohol and liquid oxygen, and the combustion effect can be improved by improving the atomization effect. The injector in the prior art is difficult to ensure the mixing effect of alcohol and liquid oxygen, and the atomization effect is poor. Summary of the invention

[0005] The purpose of the present invention is to provide a double-click injector and a steam generator to solve the technical problem that the injector in the prior art is difficult to ensure the mixing effect of alcohol and liquid oxygen and the atomization effect is poor. The preferred technical solutions among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] The double-click injector provided by the present invention comprises an injector body, wherein a first medium chamber and a second medium chamber are arranged in the injector body, wherein:

[0008] The first medium chamber and the second medium chamber are annular chambers and are alternately arranged around the central axis of the injector body. The first medium chamber is connected to a first nozzle, and the second medium chamber is connected to a second nozzle.

[0009] The first nozzle and the second nozzle are both inclined relative to the central axis of the injector body, and the distance between adjacent first nozzles and second nozzles gradually decreases in a direction away from the first medium chamber or the second medium chamber.

[0010] Preferably, the injector further comprises a first liquid collecting ring and a second liquid collecting ring, wherein:

[0011] The first liquid collecting ring is communicated with the first medium chamber for pumping the first medium into the first medium chamber, and the second liquid collecting ring is communicated with the second medium chamber for pumping the second medium into the second medium chamber.

[0012] Preferably, the first liquid collecting ring and the second liquid collecting ring are arranged at intervals along the direction of the central axis of the injector body;

[0013] The central axes of the first liquid collecting ring and the second liquid collecting ring are arranged colinearly with the central axis of the injector body.

[0014] Preferably, the number of the first medium chambers is at least two, and the first liquid collecting ring is connected to a first shunt pipe and a second shunt pipe, wherein:

[0015] The first flow dividing pipe and the second flow dividing pipe are respectively connected to the inner side and the outer ring of the first liquid collecting ring, so as to introduce the first medium in the first liquid collecting ring into different first medium chambers respectively.

[0016] Preferably, one of the first medium chambers is located on the central axis of the injector, and the liquid inlet ends of the first medium chamber and the second medium chamber gradually decrease in a direction away from the central axis of the injector.

[0017] Preferably, except for the outermost first medium chamber, the remaining first medium chambers are connected to two first nozzles, and the two first nozzles gradually move away from each other in a direction away from the first medium chamber, and the remaining second medium chambers are connected to two second nozzles, and the two second nozzles gradually move away from each other in a direction away from the second medium chamber.

[0018] Preferably, the first shunt pipe and the second shunt pipe both include a curved pipe section and a straight pipe section, wherein:

[0019] The curved pipe section is connected to both ends of the straight pipe section, one of the curved pipe sections is fixedly connected and communicated with the first liquid collecting ring, and the other curved pipe section is fixedly connected and communicated with the first medium chamber.

[0020] Preferably, the second liquid collecting ring is connected to a liquid outlet pipe, one end of the liquid outlet pipe is fixed to the lower side of the second liquid collecting ring, and the other end of the liquid outlet pipe is bent and connected to the second medium chamber.

[0021] Preferably, the injector body is further provided with a water chamber, which is an annular chamber and is located outside the first medium chamber and the second medium chamber;

[0022] The water chamber is connected to a third nozzle for cooling the water film at a position close to the injection surface of the combustion chamber;

[0023] The third nozzle is inclined relative to the central axis of the injector body, and the distance between the third nozzle and the first medium chamber or the second medium chamber gradually increases in a direction away from the water chamber.

[0024] The present invention also provides a steam generator, comprising the above-mentioned double-click injector.

[0025] Compared with the prior art, the double-click injector and steam generator provided by the present invention have the following beneficial effects: the first medium chamber and the second medium chamber are arranged alternately and spaced in sequence around the central axis of the injector body, the liquid oxygen in the first medium chamber is ejected from the first nozzle, and the alcohol in the second medium chamber is ejected from the second nozzle, which can be mixed more fully, and because the distance between the adjacent first nozzle and the second nozzle gradually decreases in the direction away from the first medium chamber or the second medium chamber, the liquid oxygen and alcohol are ejected from the first nozzle and the second nozzle at a certain speed, which can improve the atomization effect, form a gas with stable pressure, uniform mixing and good atomization, thereby improving the subsequent combustion efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 It is a schematic cross-sectional structure diagram of the double-click injector of the present invention;

[0028] Figure 2 is a top view of the double-click injector of the present invention;

[0029] Figure 3 yes Figure 1 A partial enlarged view of point A in the middle.

[0030] In the figure, 1 is the first medium chamber; 11 is the first nozzle; 2 is the second medium chamber; 21 is the second nozzle; 3 is the water chamber; 31 is the third nozzle; 4 is the first liquid collecting ring; 41 is the first diverter pipe; 42 is the second diverter pipe; 421 is the curved pipe section; 422 is the straight pipe section; 5 is the second liquid collecting ring; 51 is the liquid outlet pipe. DETAILED DESCRIPTION

[0031] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0032] In the description of the present invention, it should be understood that the terms "center", "length", "width", "height", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "side" and the like indicate positions or positional relationships based on the positions or positional relationships shown 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 element 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 the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0033] The embodiment of the present invention provides a double-click injector, which can improve the atomization effect and form a fuel gas with stable pressure, uniform mixing and good atomization.

[0034] Combine the following Figure 1-Figure 3 The technical solution provided by the present invention is described in more detail.

[0035] Embodiment 1:

[0036] See also Figure 1-Figure 3 As shown, the double-click injector provided by the present invention includes an injector body, in which a first medium chamber 1 and a second medium chamber 2 are arranged, wherein: the first medium chamber 1 and the second medium chamber 2 are annular chambers, and are arranged alternately in sequence around the central axis of the injector body, the first medium chamber 1 is connected to the first nozzle 11, and the second medium chamber 2 is connected to the second nozzle 21; the first nozzle 11 and the second nozzle 21 are both inclined compared to the central axis of the injector body, and the distance between adjacent first nozzles 11 and second nozzles 21 gradually decreases in the direction away from the first medium chamber 1 or the second medium chamber 2.

[0037] Among them, the first medium can be liquid oxygen, and the second medium can be alcohol. The liquid oxygen enters the first medium chamber 1 and is ejected from the first nozzle 11. The alcohol enters the second medium chamber 2 and is ejected from the second nozzle 21. The liquid oxygen and the alcohol are fully mixed on the ejection side of the first nozzle 11 and the second nozzle 21.

[0038] Among them, see Figure 3As shown, "double-click" means that there are two liquids that collide and mix at one collision point, see Figure 3 As shown, at each impact point, the first medium (liquid oxygen) and the second medium (alcohol) collide and mix, thereby improving the atomization effect.

[0039] See also Figure 3 As shown, in this embodiment, the angle between the first nozzle 11 and the central axis of the injector body is 15°, the angle between the second nozzle 21 and the central axis of the injector body is 15°, the first nozzle 11 and the second nozzle 21 are arranged opposite to each other in a direction away from the first medium chamber 1 and the second medium chamber 2, and because the first medium chamber 1 and the second medium chamber 2 are annular chambers, liquid oxygen and alcohol are easily mixed in all directions.

[0040] In the double-click injector of the present embodiment, the first medium chamber 1 and the second medium chamber 2 are arranged alternately in sequence around the central axis of the injector body, the liquid oxygen in the first medium chamber 1 is ejected from the first nozzle 11, and the alcohol in the second medium chamber 2 is ejected from the second nozzle 21, which can be mixed more fully, and because the distance between the adjacent first nozzle 11 and the second nozzle 21 gradually decreases in the direction away from the first medium chamber 1 or the second medium chamber 2, the liquid oxygen and alcohol are ejected from the first nozzle 11 and the second nozzle 21 at a certain speed, which can improve the atomization effect, form a gas with stable pressure, uniform mixing and good atomization, thereby improving the subsequent combustion efficiency.

[0041] As an alternative embodiment, see Figure 1 As shown, the injector also includes a first liquid collecting ring 4 and a second liquid collecting ring 5, wherein: the first liquid collecting ring 4 is connected to the first medium chamber 1, and is used to pump the first medium into the first medium chamber 1, and the second liquid collecting ring 5 is connected to the second medium chamber 2, and is used to pump the second medium into the second medium chamber 2.

[0042] Liquid oxygen enters the first medium chamber 1 from the first collecting ring 4 and is ejected from the first nozzle 11, and alcohol enters the second medium chamber 2 from the second collecting ring 5 and is ejected from the second nozzle 21, so that the two media are pumped, ejected and mixed in an orderly manner.

[0043] As an alternative embodiment, see Figure 1 As shown, the first liquid collecting ring 4 and the second liquid collecting ring 5 are arranged at intervals along the direction of the central axis of the injector body; the central axes of the first liquid collecting ring 4 and the second liquid collecting ring 5 are arranged colinearly with the central axis of the injector body.

[0044] The structures of the first liquid collecting ring 4 and the second liquid collecting ring 5 can fully utilize the space in the central axis direction of the injector body, reduce the radial area of ​​the injector, and improve the compactness of the structure.

[0045] As an optional embodiment, the number of the first medium chambers 1 is at least two. In this embodiment, see Figure 1 As shown, there are two first medium chambers 1, and the first liquid collecting ring 4 is connected with a first diversion pipe 41 and a second diversion pipe 42, wherein: the first diversion pipe 41 and the second diversion pipe 42 are respectively connected to the inner side and the outer ring of the first liquid collecting ring 4, so as to introduce the first medium in the first liquid collecting ring 4 into different first medium chambers 1 respectively.

[0046] The liquid oxygen in the first liquid collecting ring 4 can be respectively sent to different first medium chambers 1 from the first shunt pipe 41 and the second shunt pipe 42, so as to realize the shunt of liquid oxygen, reduce the number of the first liquid collecting rings 4, and improve the compactness of the structure. The second medium chamber 2 is located between the two first medium chambers 1, and the shunt liquid oxygen can be fully mixed with the alcohol sprayed from the first nozzle 11 after being sprayed from the second nozzle 21.

[0047] As an alternative embodiment, see Figure 1 As shown, one of the first medium chambers 1 is located on the central axis of the injector, and the liquid inlet ends of the first medium chamber 1 and the second medium chamber 2 gradually decrease in the direction away from the central axis of the injector.

[0048] The arrangement structure of the liquid inlet ends of the first medium chamber 1 and the second medium chamber 2 can cooperate with the structure of the first liquid collecting ring 4 and the second liquid collecting ring 5 to prevent the liquid oxygen and alcohol from interfering with each other and facilitate the orderly flow of the two media.

[0049] As an alternative embodiment, see Figure 1 and Figure 3 As shown, except for the outermost first medium chamber 1, the remaining first medium chambers 1 are connected to two first nozzles 11, and the two first nozzles 11 gradually move away from each other in a direction away from the first medium chamber 1, and the remaining second medium chambers 2 are connected to two second nozzles 21, and the two second nozzles 21 gradually move away from each other in a direction away from the second medium chamber 2.

[0050] For the above structure, see Figure 1 and Figure 3 As shown, the alcohol in the second medium chamber 2 can be sprayed out from the two second nozzles 21 respectively, so as to be fully mixed with the liquid oxygen sprayed out from the two first medium chambers 1. One second medium chamber 2 can cooperate with the first medium chambers 1 on both sides to improve the mixing and atomization effect of the two media.

[0051] As an alternative embodiment, see Figure 1As shown, the first shunt pipe 41 and the second shunt pipe 42 both include a curved pipe section 421 and a straight pipe section 422, wherein: the curved pipe section 421 is connected to both ends of the straight pipe section 422, one of the curved pipe sections 421 is fixedly connected and communicated with the first liquid collecting ring 4, and the other curved pipe section 421 is fixedly connected and communicated with the first medium chamber 1.

[0052] The above structures of the first shunt pipe 41 and the second shunt pipe 42 facilitate the communication between the first collecting ring 4 and different first medium chambers 1 and prevent interference with the structure of the second collecting ring 5 .

[0053] As an alternative embodiment, see Figure 1 As shown, the second liquid collecting ring 5 is connected to a liquid outlet pipe 51 , one end of the liquid outlet pipe 51 is fixed to the lower side of the second liquid collecting ring 5 , and the other end of the liquid outlet pipe 51 is bent and connected to the second medium chamber 2 .

[0054] The structure of the liquid outlet pipe 51 facilitates the communication between the second liquid collecting ring 5 and the second medium chamber 2 and prevents interference with the structure of the first liquid collecting ring 4 .

[0055] The double-click injector of the present embodiment has the above structure capable of realizing orderly flow of two media. Liquid oxygen is diverted from the first liquid collecting ring 4, the first diverter pipe 41, and the second diverter pipe 42 to different first medium chambers 1, and alcohol enters the second medium chamber 2 from the second liquid collecting ring 5 and the liquid outlet pipe 51. The liquid oxygen sprayed from the first nozzle 11 and the alcohol sprayed from the second nozzle 21 collide and mix with each other after being sprayed, thereby improving the mixing effect of alcohol and liquid oxygen.

[0056] As an alternative embodiment, see Figure 1 and Figure 3 As shown, a water chamber 3 is also provided on the injector body. The water chamber 3 is an annular chamber and is located on the periphery of the first medium chamber 1 and the second medium chamber 2. The water chamber 3 is connected to a third nozzle 31 for cooling the water liquid film near the injection surface of the combustion chamber. The third nozzle 31 is inclined relative to the central axis of the injector body, and the distance between the third nozzle 31 and the first medium chamber 1 or the second medium chamber 2 gradually increases in the direction away from the water chamber 3.

[0057] The external water source enters the water chamber 3 from the water inlet pipe provided on the injector body, and is ejected from the third nozzle 31. A plurality of third nozzles 31 are arranged at intervals around the central axis of the injector body. The water does not affect the full mixing and atomization of alcohol and liquid oxygen, and realizes the water film cooling of the combustion chamber near the injection surface. The third nozzle 31 is inclined outward by 15°.

[0058] The double-click injector of the present embodiment is a four-click injector. The injector adopts a ring groove layout structure, which is divided into two first medium (liquid oxygen) chambers, one second medium (alcohol) chamber, and the outermost layer has a water chamber 3. The ideal atomization effect of the liquid is achieved through a reasonable layout, and experiments have verified that the present invention has good combustion stability.

[0059] Embodiment 2:

[0060] This embodiment provides a steam generator, including the above-mentioned double-click injector.

[0061] The combustion chamber is fixedly connected with a large-flow centrifugal single-nozzle injector, and the atomized first medium and the second medium can be sprayed into the combustion chamber after mixing.

[0062] In the description of this specification, specific features, structures or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0063] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0064] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A double-click injector, characterized in that: The invention comprises an injector body, wherein a first medium chamber and a second medium chamber are arranged in the injector body, wherein: The first medium chamber and the second medium chamber are annular chambers and are alternately arranged around the central axis of the injector body. The first medium chamber is connected to a first nozzle, and the second medium chamber is connected to a second nozzle. The first nozzle and the second nozzle are both inclined relative to the central axis of the injector body, and the distance between adjacent first nozzles and second nozzles gradually decreases in a direction away from the first medium chamber or the second medium chamber.

2. The double-click injector according to claim 1, characterized in that: The injector further comprises a first liquid collecting ring and a second liquid collecting ring, wherein: The first liquid collecting ring is communicated with the first medium chamber for pumping the first medium into the first medium chamber, and the second liquid collecting ring is communicated with the second medium chamber for pumping the second medium into the second medium chamber.

3. The double-click injector according to claim 2, characterized in that: The first liquid collecting ring and the second liquid collecting ring are arranged at intervals along the central axis of the injector body; The central axes of the first liquid collecting ring and the second liquid collecting ring are arranged colinearly with the central axis of the injector body.

4. The double-click injector according to claim 2, characterized in that: The number of the first medium chambers is at least two, and the first liquid collecting ring is connected with a first shunt pipe and a second shunt pipe, wherein: The first flow dividing pipe and the second flow dividing pipe are respectively connected to the inner side and the outer ring of the first liquid collecting ring, so as to introduce the first medium in the first liquid collecting ring into different first medium chambers respectively.

5. The double-click injector according to claim 2, characterized in that: One of the first medium chambers is located on the central axis of the injector, and the liquid inlet ends of the first medium chamber and the second medium chamber gradually decrease in a direction away from the central axis of the injector.

6. The double-click injector according to claim 1 or 5, characterized in that: Except for the outermost first medium chamber, the remaining first medium chambers are connected to two first nozzles, and the two first nozzles gradually move away from each other in a direction away from the first medium chamber. The remaining second medium chambers are connected to two second nozzles, and the two second nozzles gradually move away from each other in a direction away from the second medium chamber.

7. The double-click injector according to claim 4, characterized in that: The first shunt pipe and the second shunt pipe both include a curved pipe section and a straight pipe section, wherein: The curved pipe section is connected to both ends of the straight pipe section, one of the curved pipe sections is fixedly connected and communicated with the first liquid collecting ring, and the other curved pipe section is fixedly connected and communicated with the first medium chamber.

8. The double-click injector according to claim 2, characterized in that: The second liquid collecting ring is connected with a liquid outlet pipe, one end of the liquid outlet pipe is fixed to the lower side of the second liquid collecting ring, and the other end of the liquid outlet pipe is bent and connected with the second medium chamber.

9. The double-click injector according to claim 1, characterized in that: The injector body is also provided with a water chamber, which is an annular chamber and is located outside the first medium chamber and the second medium chamber; The water chamber is connected to a third nozzle for cooling the water film at a position close to the injection surface of the combustion chamber; The third nozzle is inclined relative to the central axis of the injector body, and the distance between the third nozzle and the first medium chamber or the second medium chamber gradually increases in a direction away from the water chamber.

10. A steam generator, characterized in that: A double-click injector comprising the double-click injector as described in any one of claims 1-9.

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