Variable-swirl multi-head combustion chamber

Abstract

The present application relates to the technical field of engine, and provides a variable mixing hole multi-head combustion chamber.The variable mixing hole multi-head combustion chamber comprises a flame tube, a head end wall assembly and a mixing hole plate assembly.The flame tube comprises a flame tube body, the outer wall of the flame tube body is provided with a plurality of divergent cooling holes, and the top is provided with a mixing plate assembly mounting window, the mixing plate assembly mounting window is provided with a plurality of air holes;the mixing hole plate assembly is detachably arranged on the mixing plate assembly mounting window, and the mixing hole plate assembly comprises a pressing ring and a mixing hole plate, the mixing hole plate is provided with a plurality of divergent cooling holes and mixing holes, and the divergent cooling holes and the mixing holes are arranged in a staggered manner.The present application solves the defects in the prior art that the whole new combustion chamber flame tube needs to be processed every time the mixing hole configuration of the combustion chamber flame tube is replaced, the processing cost is high, and a large amount of time and funds are spent, and a variable mixing hole multi-head combustion chamber which only needs to replace different mixing hole plates is realized, so that a large amount of time and funds can be saved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of engine, in particular to a variable mixing hole multi-head combustion chamber. BACKGROUND

[0002] The conventional combustion chamber flame tube is generally provided with a mixing hole structure. When the combustion chamber is normally operated, the airflow is introduced from the annular cavity to form a transverse jet flow, which is mixed with the main flow burned in the flame tube. The geometric structure and aerodynamic characteristics of the mixing hole affect the penetration and mixing characteristics of the jet flow, and further affect the overall results of the outlet temperature distribution. The regulation and influence of the outlet temperature distribution have been the focus of attention. Therefore, adjusting the size, position and structure of the mixing hole is one of the important means to regulate the outlet temperature distribution of the combustion chamber.

[0003] In the design stage of the combustion chamber, the performance test of the flame tube with different sizes, positions and forms of the mixing hole is usually required. The design parameters of the mixing hole need to be adjusted repeatedly to achieve the standard and optimization of multiple performance parameters. However, in general, for the model combustion chamber with multiple swirler heads applied to heating and pressurizing or even high temperature and high pressure conditions, due to the pressure caused by the flame tube width and the temperature and pressure bearing of the flame tube, the combustion chamber flame tube is usually integrally processed to ensure the strength of the combustion chamber. This results in difficulty in efficiently performing combustion tests of various mixing hole schemes. Each time the design scheme of the mixing hole is replaced, a long processing time and high cost are required.

[0004] In the prior art, the flame tube of the combustion chamber is designed integrally. Each time the mixing hole structure is replaced, a new combustion chamber flame tube needs to be processed, which is high in processing cost and expensive. SUMMARY

[0005] The present application provides a variable mixing hole multi-head combustion chamber to solve the defect that the flame tube of the combustion chamber in the prior art needs to be processed into a new combustion chamber flame tube each time the mixing hole structure is replaced, which is high in processing cost and expensive. A variable mixing hole multi-head combustion chamber that only needs to replace different mixing hole plates is realized, thereby saving a lot of time and funds.

[0006] The present application provides a variable mixing hole multi-head combustion chamber, comprising:

[0007] The flame tube comprises a flame tube body, the outer wall of the flame tube body is provided with a plurality of divergent cooling holes, and the top and bottom are provided with mixing plate assembly installation windows, the mixing plate assembly installation window is provided with a plurality of air holes, the bottom end of the plurality of air holes is provided with a cooling channel, the cooling channel is in communication with the air hole, and the cooling channel is in communication with the divergent cooling hole;

[0008] A head end wall assembly is provided at a first side of the flame tube for mounting swirler;

[0009] A mixing hole plate assembly is detachably provided in the mixing plate assembly mounting window, the mixing hole plate assembly comprises a pressure ring and a mixing hole plate, the mixing hole plate is mounted in the mixing plate assembly mounting window through the pressure ring, the pressure ring is provided with a vent hole avoiding notch corresponding to the vent hole, the mixing hole plate is provided with a plurality of the divergent cooling holes and mixing holes, the divergent cooling holes and the mixing holes are arranged in a staggered manner, and the mixing hole plate is further provided with a reinforcing rib.

[0010] According to the variable mixing hole multi-head combustion chamber provided by the application, an inner wall of the mixing plate assembly mounting window is provided with a mixing plate assembly clamping edge, an outer periphery of the pressure ring is provided with a fixing piece pressing edge, and an outer periphery of the mixing hole plate is provided with a mixing hole plate turn-up edge.

[0011] The mixing hole plate turn-up edge is pressed in the mixing plate assembly clamping edge, the pressure ring is pressed in the mixing hole plate turn-up edge, and the fixing piece pressing edge is detachably provided in the mixing plate assembly mounting window.

[0012] According to the variable mixing hole multi-head combustion chamber provided by the application, a sealing gasket is arranged between the mixing hole plate turn-up edge and the mixing plate assembly clamping edge, and a sealing gasket is arranged between the mixing hole plate turn-up edge and the pressure ring.

[0013] According to the variable mixing hole multi-head combustion chamber provided by the application, the head end wall assembly comprises a head end wall body, the head end wall body is connected with the flame tube, and the head end wall body is provided with a plurality of swirler mounting seats.

[0014] According to the variable mixing hole multi-head combustion chamber provided by the application, the inside of each of two side walls adjacent to the head end wall assembly is provided with an impingement and divergence wall mounting cavity, the impingement and divergence wall mounting cavity is provided with a plurality of side wall impingement holes and connecting through holes, the side wall impingement holes and the connecting through holes are arranged in a staggered manner, and the inside of the impingement and divergence wall mounting cavity is provided with an impingement and divergence wall.

[0015] According to the variable mixing hole multi-head combustion chamber provided by the application, the impingement and divergence wall comprises an impingement and divergence wall body, the impingement and divergence wall body is provided with a plurality of the divergent cooling holes and impingement and divergence wall spoiler columns, and the divergent cooling holes and the impingement and divergence wall spoiler columns are arranged in a staggered manner.

[0016] According to the variable mixing hole multi-head combustion chamber provided by the application, an outer periphery of the impingement and divergence wall body is provided with an impingement and divergence wall sealing edge.

[0017] According to the variable mixing hole multi-head combustion chamber provided by the application, the flame tube body comprises a straight section and a contraction section, the mixing hole plate assembly is arranged on the contraction section, the head end wall assembly is arranged on the straight section, and the contraction section is provided with a flange connection part.

[0018] According to the variable mixing hole multi-head combustion chamber provided by the application, the flange connection part is detachably provided with a flange.

[0019] The one or more technical solutions in the embodiments of the application have at least one of the following technical effects:

[0020] According to the variable mixing hole multi-head combustion chamber provided by the application, the mixing plate assembly mounting window is arranged on the top of the flame tube body, and then the mixing hole plate assembly is detachably arranged on the mixing plate assembly mounting window, so that when high-temperature and high-pressure experiments of actual operation conditions need to be simulated for different positions, different mixing hole sizes, different mixing hole shapes and whether the mixing hole has a flange, the mixing hole plate on the mixing plate assembly can be randomly replaced according to design requirements, so that the drawbacks of the prior art that the entire flame tube needs to be replaced can be avoided, and a large amount of time and expenses can be saved.

[0021] Further, the mixing plate assembly mounting window is provided with a plurality of air holes, and the inside of the mixing plate assembly mounting window is also provided with an air hole, a cooling channel is arranged in communication with the bottom of the air hole, and the cooling channel is in communication with the divergent cooling hole. The airflow is introduced by the air hole on the surface of the window from the outside of the flame tube, enters the cooling channel inside, and then enters the combustion chamber in the form of a divergent gas film through the divergent cooling hole. Therefore, the mixing plate assembly mounting window is increased while the gas film cooling of the corresponding position is maintained, the cooling is strengthened in the form of impact divergence, the temperature resistance of the flame tube of the combustion chamber can be increased, and the flame tube wall surface is not easily burned by the high-temperature combustion gas in the use process. The cooling requirement of the flame tube is ensured in the form of impact divergence cooling. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0023] Figure 1 is an exploded view of the variable mixing hole multi-head combustion chamber provided by the application;

[0024] Figure 2 is a first perspective view of the variable mixing hole multi-head combustion chamber provided by the application;

[0025] Figure 3is a second perspective view of the variable-port multi-head combustion chamber provided by the present application;

[0026] Figure 4 is a side view of the variable-port multi-head combustion chamber provided by the present application;

[0027] Figure 5 is a structure diagram of the flame tube of the variable-port multi-head combustion chamber provided by the present application;

[0028] Figure 6 is an exploded view of the port plate assembly of the variable-port multi-head combustion chamber provided by the present application;

[0029] Figure 7 is a front view of the port plate assembly of the variable-port multi-head combustion chamber provided by the present application;

[0030] Figure 8 is a partial sectional view of the variable-port multi-head combustion chamber provided by the present application;

[0031] Figure 9 is a structure diagram of the head end wall assembly of the variable-port multi-head combustion chamber provided by the present application;

[0032] Figure 10 is a structure diagram of the impingement divergent wall of the variable-port multi-head combustion chamber provided by the present application;

[0033] Figure 11 is Figure 10 an enlarged view of A.

[0034] Reference signs:

[0035] 100: flame tube; 110: flame tube body; 111: divergent cooling hole; 112: connecting through hole; 113: straight section; 114: convergent section; 120: port plate assembly mounting window; 121: vent hole; 122: port plate assembly clamping edge; 123: cooling channel 130: flange connection; 140: impingement divergent wall mounting cavity; 141: side wall impingement hole;

[0036] 200: port plate assembly; 210: pressure ring; 211: fixed part clamping edge; 212: vent hole avoiding notch; 220: port plate; 221: port plate flange; 222: gasket; 223: port; 224: reinforcing rib;

[0037] 300: head end wall assembly; 310: head end wall body; 320: swirler mounting seat;

[0038] 400: impingement diverging wall; 410: impingement diverging wall body; 420: impingement diverging wall spoiler; 430: impingement diverging wall fixing bolt; 440: impingement diverging wall sealing edge;

[0039] 500: flange. DETAILED DESCRIPTION

[0040] In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the present application will be described clearly and completely below in conjunction with the drawings in the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0041] In the description of the embodiments of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "first", "second" are numbered for the purpose of clearly describing the components of the product, and do not represent any substantial difference. The directions of "up" and "down" are based on the directions shown in the drawings. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances. In addition, the meaning of "multiple" is two or more. The "and / or" in the specification means at least one of the connected objects, and the character " / " generally means that the front and rear associated objects are in an "or" relationship.

[0042] In the description of the present application, it should be noted that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0043] In the design process of the combustion chamber, in order to obtain the test results of the combustion performance of the variable mixing hole scheme, it is usually necessary to carry out high temperature and high pressure experiments for multiple times under actual operating conditions for different positions, different mixing hole sizes, different mixing hole shapes and whether the mixing hole has a flange. The flame tube of the existing combustion chamber is designed in one piece, and each time the mixing hole structure is replaced, a new combustion chamber flame tube needs to be processed, which is high in processing cost and expensive. In order to solve this problem, with reference to Figures 1 to 11 , the present application provides a variable mixing hole multi-head combustion chamber.

[0044] Figure 1 An exploded view of the variable mixing hole multi-head combustion chamber provided by the embodiments of the present application is shown; Figure 5A structural schematic diagram of a flame tube of a variable mixing hole multi-head combustion chamber is shown in the embodiments of the present application; Figure 6 An exploded view of a mixing hole plate assembly of a variable mixing hole multi-head combustion chamber is shown in the embodiments of the present application; Figure 7 A front view of a mixing hole plate assembly of a variable mixing hole multi-head combustion chamber is shown in the embodiments of the present application; Figure 8 A partial sectional view of a variable mixing hole multi-head combustion chamber is shown in the embodiments of the present application.

[0045] Referring to Figure 1 , Figure 5 , Figure 6 , Figure 7 and Figure 8 , in some embodiments of the present application, the variable mixing hole multi-head combustion chamber comprises a flame tube 100, a mixing hole plate assembly 200 and a head end wall assembly 300.

[0046] The flame tube 100 comprises a flame tube body 110, and the outer wall of the flame tube body 110 is provided with a plurality of divergent cooling holes 111, wherein the divergent cooling holes 111 on the top wall and the bottom wall are arranged obliquely, and the diameter of the divergent cooling holes 111 is 0.4mm-0.8mm. The angle between the divergent cooling holes 111 on the top wall and the bottom wall and the top wall and the bottom wall is 15 degrees-45 degrees. The divergent cooling holes 111 on the two side walls of the flame tube body 110 are arranged vertically to the two side walls; the divergent cooling holes 111 on the rear wall of the flame tube body 110 are also arranged vertically to the rear wall.

[0047] The top and bottom of the flame tube body 110 are provided with mixing plate assembly installation windows 120, and the mixing plate assembly installation windows 120 are provided with a plurality of air holes 121, the bottom end of the plurality of air holes 121 is provided with a cooling channel 123, the cooling channel 123 is communicated with the air holes 121, and the cooling channel 123 is also communicated with the divergent cooling holes 111 on the bottom thereof;

[0048] The head end wall assembly 300 is arranged at the front end of the flame tube 100, and is used for installing a swirler;

[0049] The mixing hole plate assembly 200 is detachably arranged in the mixing plate assembly mounting window 120, the mixing hole plate assembly 200 comprises a compression ring 210 and a mixing hole plate 220, the mixing hole plate 220 is arranged in the mixing plate assembly mounting window 120 through the compression ring 210; the compression ring 210 is provided with a ventilation hole avoiding notch 212, the ventilation hole avoiding notch 212 is arranged corresponding to the ventilation hole 121; the mixing hole plate 220 is provided with a plurality of divergent cooling holes 111 and mixing holes 223, and the divergent cooling holes 111 and the mixing holes 223 are arranged staggeredly. The mixing hole plate 220 is further provided with a reinforcing rib 224, the thickness of the reinforcing rib 224 is 2mm-4mm. It should be noted that the plurality of mixing holes 223 are arranged staggeredly, and are arranged to avoid the mixing hole 223. By arranging the reinforcing rib 224, the deformation of the mixing hole plate 220 under high temperature can be avoided, and the mixing hole plate 220 can be used repeatedly.

[0050] By arranging the mixing plate assembly mounting window 120 on the top of the flame tube body 110, and then detachably arranging the mixing hole plate assembly 200 on the mixing plate assembly mounting window 120, when the high temperature and high pressure experiment of the actual operation condition is needed to be simulated for different positions, different mixing hole sizes, different mixing hole shapes and whether the mixing hole is provided with a flange, the mixing hole plate 220 on the mixing hole plate assembly 200 can be replaced randomly according to the design requirement, so that the disadvantage that the whole flame tube needs to be replaced in the prior art can be avoided, and a lot of time and cost can be saved.

[0051] Secondly, the mixing plate assembly mounting window 120 is provided with a plurality of ventilation holes 121, and the inside of the mixing plate assembly mounting window 120 is further provided with a cooling channel 123, and the bottom of the cooling channel 123 is also provided with a divergent cooling hole 111. The airflow is introduced by the ventilation hole 121 on the window surface from the outside of the flame tube 100, enters the cooling channel 123 in the inside interlayer, and then enters the combustion chamber in the form of a divergent gas film through the divergent cooling hole 111. Thus, the mixing plate assembly mounting window 120 is arranged while the gas film cooling of the corresponding position is maintained, and the cooling is strengthened in the form of impact divergence, the temperature resistance of the flame tube 100 of the combustion chamber can be increased, and the flame tube wall surface is not burned by the high temperature gas in the inside during use. The cooling requirement of the flame tube 100 is ensured in the form of impact divergence cooling.

[0052] Specifically, the head end wall assembly 300 is arranged at the front end of the flame tube body 110, the flange 500 is arranged at the rear end of the flame tube body 110, the mixing plate assembly mounting window 120 is provided with two, and the two mixing plate assembly mounting windows 120 are symmetrically arranged at the bottom end and the top end of the flame tube body 110.

[0053] The flame tube body 110 is internally provided with a chamber for organizing combustion, the upper and lower sides of the head end wall assembly 300 are provided with horizontal connecting plates, and the horizontal connecting plates are also provided with connecting through holes 112. When it is necessary to connect the head end wall assembly 300 to the rear end face of the flame tube body 110, the upper and lower sides of the head end wall assembly 300 are only needed to be attached to the inner walls of the upper and lower faces of the flame tube body 110, at this time, the connecting through holes 112 on the upper and lower wall faces of the head end wall assembly 300 and the flame tube body 110 are aligned, then the bolts are passed through the connecting through holes 112, and then the nuts are used for fixed connection. It should be noted that the divergent cooling holes 111 are arranged on each wall of the flame tube body 110, the diameter of the divergent cooling holes 111 is 0.4mm-0.8mm, the diameters of the divergent cooling holes 111 on the same wall can be the same or different, and the diameters of the divergent cooling holes 111 on different walls can be the same or different. The diameters and quantities of the divergent cooling holes 111 at different positions can be designed according to the cooling requirements.

[0054] The two mixing plate assembly installation windows 120 are obliquely arranged. The front end of the mixing plate assembly installation window 120 is higher than the rear end of the mixing plate assembly installation window 120 (the orientation is consistent with that of the flame tube body 110), the mixing plate assembly installation window 120 is a rectangular ring-shaped convex structure protruding from the surface of the flame tube body 110, and is integrally formed with the flame tube body 110. A smooth transition section is arranged at the connection between the mixing plate assembly installation window 120 and the flame tube body 110. The outer wall of the flame tube body 110 is provided with divergent cooling holes 111, and the top of the flame tube body 110 located at the bottom of the mixing plate assembly installation window 120 is also provided with divergent cooling holes 111. The air passage 121 penetrates downward from the top surface of the mixing plate assembly installation window 120 and communicates with the divergent cooling holes 111 at the bottom of the mixing plate assembly installation window 120. The incoming airflow outside the flame tube 100 can enter the combustion chamber inside the flame tube body 110 through the air passage 121 and the divergent cooling holes 111 at the bottom, forming multiple air film coolings on the inner wall of the flame tube 100, thereby improving the temperature and pressure bearing capacity of the flame tube 100. The mixing plate assembly installation window 120 is further provided with a connecting through hole 112, which is arranged in the interval between the air passage 121 and the connecting through hole 112. The connecting through hole 112 is used for connecting the mixing hole plate assembly 200 to the mixing plate assembly installation window 120. When it is necessary to replace the mixing hole plate assembly 200, it can be directly disassembled from the mixing plate assembly installation window 120.

[0055] By setting the mixing plate assembly installation window 120, on the one hand, a step structure is provided for the installation of the mixing orifice plate assembly 200, and on the other hand, a connection through hole 112 (diameter 6mm-8mm) and a ventilation hole 121 (diameter 5mm-8mm) are arranged in a staggered manner on the upper surface of the mixing plate assembly installation window 120. In order to ensure that the increase in the boss structure does not affect the arrangement of the divergent cooling holes 111 at the corresponding position on the inner side of the wall surface of the flame tube 100, the incoming airflow enters the inner cooling channel 123 from the ventilation hole 121 on the surface of the mixing plate assembly installation window 120, and then enters the interior of the flame tube 100 through the divergent cooling holes 111 arranged in the inner cooling channel, thereby making up for the problem of cooling loss caused by the increase in the boss structure.

[0056] Further, the mixing orifice plate 220 is an integrally formed metal plate, and its thickness is consistent with the thickness (2mm-3mm) of the upper and lower wall surfaces of the flame tube body 110. The divergent cooling holes 111 are arranged on the mixing orifice plate 220. In some possible embodiments, the mixing orifice plate 220 can be provided with mixing orifices 223 of different diameters and different shapes at different positions according to actual conditions. The diameter of the mixing orifice plate 220 is 2mm-15mm, and the shape of the mixing orifice plate 220 can be circular, star-shaped, drop-shaped, irregular, rhombic, etc. Specifically, there can be six circular holes.

[0057] Referring to Figure 5 and Figure 6 In some embodiments of the present application, the inner wall of the mixing plate assembly installation window 120 is provided with a mixing plate assembly clamping edge 122, the outer periphery of the compression ring 210 is provided with a fixing part compression edge 211, and the outer periphery of the mixing orifice plate 220 is provided with a mixing orifice plate flange 221; the mixing orifice plate flange 221 is pressed on the mixing plate assembly clamping edge 122, the compression ring 210 is pressed on the mixing orifice plate flange 221, and the fixing part compression edge 211 is detachably arranged on the mixing plate assembly installation window 120. The mixing plate assembly installation window 120 is also provided with a connection through hole 112, which is arranged in a staggered manner with the ventilation hole 121, and the fixing part compression edge 211 is also provided with a connection through hole 112, which is arranged in a staggered manner with the ventilation hole avoiding gap 212. The connection through holes 112 on the fixing part compression edge 211 and the mixing plate assembly installation window 120 are arranged correspondingly and connected by bolts; the mixing orifice plate flange 221 and the mixing plate assembly clamping edge 122 are provided with a sealing gasket 222, and the mixing orifice plate flange 221 and the compression ring 210 are provided with a sealing gasket 222.

[0058] Specifically, the mixing plate assembly clamping edge 122 is a ring-shaped rectangular plate structure, and the specific structure thereof should be designed according to the shape of the mixing plate assembly mounting window 120 and the mixing hole plate assembly 200, and is not limited to a ring-shaped rectangular structure. The mixing plate assembly clamping edge 122 extends inwardly from the inner wall at the bottom of the mixing plate assembly mounting window 120, thereby forming a protruding structure, and the mixing plate assembly clamping edge 122 plays a bearing role. The mixing hole plate 220 is also a rectangular plate structure, and the mixing hole plate flange 221 is arranged at the outer periphery thereof and flush with the top surface thereof.

[0059] When it is necessary to install the mixing hole plate assembly 200, the mixing hole plate 220 can be placed downward, the mixing hole plate 220 can pass through the mixing plate assembly clamping edge 122, and the mixing hole plate flange 221 is clamped on the mixing plate assembly clamping edge 122. At the same time, a sealing gasket 222 is arranged between the mixing hole plate flange 221 and the mixing plate assembly clamping edge 122. The sealing gasket 222 can play a sealing role to prevent gas leakage. The material of the sealing gasket 222 can be graphite or red copper. When the mixing hole plate 220 is placed, another sealing gasket 222 is placed on the top of the mixing hole plate flange 221, thereby placing the compression ring 210 on the sealing gasket 222, and the fixing piece pressing edge 211 is in contact with the top surface of the mixing plate assembly mounting window 120. At this time, the connecting through hole 112 on the fixing piece pressing edge 211 is aligned with the connecting through hole 112 on the mixing plate assembly mounting window 120, and the air passage hole avoiding notch 212 on the fixing piece pressing edge 211 is aligned with the air passage hole 121 on the mixing plate assembly mounting window 120, thereby preventing the fixing piece pressing edge 211 from blocking the gas from entering through the air passage hole 121. Then, the two are connected by means of a bolt passing through the corresponding two connecting through holes 112, and the compression ring 210 is pressed against the mixing hole plate 220. The compression ring 210 is made of metal.

[0060] Figure 9 A structure schematic diagram of a head end wall assembly of a variable mixing hole multi-head combustion chamber is illustrated.

[0061] With reference to Figure 9 In some embodiments of the present application, the head end wall assembly 300 includes a head end wall body 310 connected with the flame tube 100, and the head end wall body 310 is provided with a plurality of swirler mounting seats 320.

[0062] Specifically, the number of the swirler mounting seats 320 can be 2-5, and in some possible embodiments, the number of the swirler mounting seats 320 is 3. Figure 9The three. Specifically, the head end wall body 310 is connected with the upper and lower two side walls of the flame tube body 110, and the three swirler mounting seats 320 are arranged in sequence in the center of the head end wall body 310. The head end wall body 310 is also provided with a plurality of divergent cooling holes 111, and the divergent cooling holes 111 located here are arranged vertically with the head end wall body 310.

[0063] Figure 10 The structure of the impact divergent wall of the variable mixing hole multi-head combustion chamber is illustrated. Figure 11 The structure of the impact divergent wall of the variable mixing hole multi-head combustion chamber is illustrated. Figure 10 The enlarged view of A in FIG. 4.

[0064] Referring to Figure 5 , Figure 10 and Figure 11 , in some embodiments of the present application, the inner part of the two side walls adjacent to the head end wall assembly 300 is provided with an impact divergent wall mounting cavity 140, the impact divergent wall mounting cavity 140 is provided with a plurality of side wall impact holes 141 and connecting through holes 112, the side wall impact holes 141 and the connecting through holes 112 are arranged in a staggered manner, and the inner part of the impact divergent wall mounting cavity 140 is provided with an impact divergent wall 400.

[0065] The impact divergent wall 400 includes an impact divergent wall body 410, the impact divergent wall body 410 is provided with a plurality of divergent cooling holes 111 and impact divergent wall spoiler columns 420, and the divergent cooling holes 111 and the impact divergent wall spoiler columns 420 are arranged in a staggered manner. Specifically, one impact divergent wall spoiler column 420 is arranged at the center of every four divergent cooling holes 111.

[0066] The depth of the impact divergent wall 400 is consistent with the depth of the impact divergent wall mounting cavity 140, so that the left and right wall surfaces of the main flame tube body 110 can still maintain as a plane after being installed, so as to prevent flame from staying during the combustion test. The side wall impact holes 141 are small holes with a diameter of 0.8mm-1.5mm which are vertically arranged on the side wall surface, the outside airflow will be impacted to the inside impact divergent wall 400 through these small holes, and then enter the inside of the flame tube 100 from the divergent cooling holes 111 after being disturbed by the impact divergent wall spoiler columns 420, so as to protect the side wall of the flame tube 100. The side wall is also provided with 10 connecting through holes 112. The tail end of the flame tube body 110, i.e. the flange connecting part 130 is provided with a flange 500, and the flange 500 is provided with a plurality of connecting through holes 112 with a diameter of 5mm-8mm, so as to install the flame tube 100 on the combustion chamber case.

[0067] The outer periphery of the impact diverging wall body 410 is provided with an impact diverging wall sealing edge 440. The impact diverging wall sealing edge 440 is in the same level with the impact diverging wall mounting cavity 140, so that the cooling gas entering from the diverging cooling holes 111 on the impact diverging wall mounting cavity 140 will not leak out from the boundary position in large amount, thereby ensuring and better distributing the cooling gas at each position of the impact diverging wall 400. In addition, the impact diverging wall body 410 is provided with 2-4 fixed bolt positions at the front, middle and rear respectively, and the impact diverging wall fixed bolt 430 is inserted from the inside of the flame tube body 110 and extends out from the connecting through hole 112 on the impact diverging wall mounting cavity 140, and the corresponding nut is used to tighten the side wall from the outside.

[0068] Figure 4 A side view of the variable mixing hole multi-head combustion chamber is shown.

[0069] Referring to Figure 4 In some embodiments of the present application, the flame tube body 110 includes a straight section 113 and a converging section 114, the mixing hole plate assembly 200 is arranged on the converging section 114, the head end wall assembly 300 is arranged on the left end of the straight section 113, the converging section 114 is provided with a flange connecting portion 130, and the flange connecting portion 130 is detachably provided with a flange 500. A plurality of connecting through holes 112 are arranged on the flange connecting portion 130 and the flange 500, and the two are connected by bolts.

[0070] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A variable swirled multi-head combustion chamber characterized by, It includes: The flame tube (100) includes a flame tube body (110), the outer wall of the flame tube body (110) is provided with a plurality of divergent cooling holes (111), and the top and bottom are provided with a mixing plate assembly installation window (120), the mixing plate assembly installation window (120) is provided with a plurality of ventilation holes (121), the bottom end of a plurality of the ventilation holes (121) is provided with a cooling channel (123), the cooling channel (123) is communicated with the ventilation hole (121), and the cooling channel (123) is communicated with the divergent cooling hole (111); The head end wall assembly (300) is arranged on the first side of the flame tube (100) and is used for installing a cyclone; The mixing hole plate assembly (200) is detachably arranged on the mixing plate assembly installation window (120), the mixing hole plate assembly (200) includes a pressure ring (210) and a mixing hole plate (220), the mixing hole plate (220) is installed on the mixing plate assembly installation window (120) through the pressure ring (210); the pressure ring (210) is provided with a ventilation hole avoiding notch (212), the ventilation hole avoiding notch (212) is correspondingly arranged with the ventilation hole (121); the mixing hole plate (220) is provided with a plurality of the divergent cooling holes (111) and mixing holes (223), and the divergent cooling holes (111) and the mixing holes (223) are arranged in a staggered manner, and the mixing hole plate (220) is further provided with a reinforcing rib (224).

2. The variable-port multi-head combustion chamber according to claim 1, characterized by, The inner wall of the mixing plate assembly installation window (120) is provided with a mixing plate assembly clamping edge (122), the outer periphery of the pressure ring (210) is provided with a fixing piece pressing edge (211), and the outer periphery of the mixing hole plate (220) is provided with a mixing hole plate flange (221); The mixing hole plate flange (221) is pressed on the mixing plate assembly clamping edge (122), the pressure ring (210) is pressed on the mixing hole plate flange (221), and the fixing piece pressing edge (211) is detachably arranged on the mixing plate assembly installation window (120).

3. The variable-port multi-head combustion chamber according to claim 2, characterized by The mixing hole plate flange (221) and the mixing plate assembly clamping edge (122) are provided with a sealing gasket (222), and the mixing hole plate flange (221) and the pressure ring (210) are provided with a sealing gasket (222).

4. The variable-port multi-head combustion chamber according to claim 2, characterized by The head end wall assembly (300) includes a head end wall body (310), the head end wall body (310) is connected with the flame tube (100), and the head end wall body (310) is provided with a plurality of cyclone mounting seats (320).

5. The variable-port multi-head combustion chamber according to claim 1, characterized by The interiors of two side walls adjacent to the head end wall assembly (300) are provided with impact divergent wall mounting cavities (140), the impact divergent wall mounting cavities (140) are provided with a plurality of side wall impact holes (141) and connecting through holes (112), the side wall impact holes (141) and the connecting through holes (112) are arranged in a staggered manner, and the impact divergent wall mounting cavities (140) are provided with an impact divergent wall (400).

6. The variable-port multi-head combustion chamber according to claim 5, characterized by The impact diverging wall (400) comprises an impact diverging wall body (410) provided with a plurality of the diverging cooling holes (111) and impact diverging wall spoiler columns (420), the diverging cooling holes (111) and the impact diverging wall spoiler columns (420) are arranged in a staggered manner.

7. The variable-port multi-head combustion chamber according to claim 6, characterized by The outer periphery of the impact diverging wall body (410) is provided with an impact diverging wall sealing edge (440).

8. The variable-port multi-head combustion chamber according to claim 1, characterized by The flame tube body (110) comprises a straight section (113) and a converging section (114), the mixing hole plate assembly (200) is arranged on the converging section (114), the head end wall assembly (300) is arranged on the straight section (113), and the converging section (114) is provided with a flange connecting portion (130).

9. The variable-port multi-head combustion chamber according to claim 8, characterized by The flange connecting portion (130) is detachably provided with a flange (500).

Images