A structure of a sector test piece of a reheat combustor

Abstract

The application belongs to the technical field of aero-engines, and particularly relates to a fan-shaped test piece structure of a thrust chamber, which mainly comprises a shell 1, mounting bolts 2, a ball head 3, a pull rod 4, an ear handle 5, a pull rod mounting seat 6, an internal flow passage piece 7, rivets 8, a support 9, a bushing 10, bolts 11, self-locking nuts 12, side plates 13 and elastic sealing sheets 14. The pull rod mounting seat 6 is welded to the internal flow passage piece 7, the support 9 is riveted to the internal flow passage piece 7, the side plates 13 are welded to the internal flow passage piece 7, and the elastic sealing sheets 14 are riveted to the side plates 13. The ball head 3 is mounted on the ear handle 5, and then the ear handle 5 and the pull rod 4 are assembled into an integrated body through threads, so that the problem of easy leakage of airflow at the intersection of the side wall of the shell is solved, and the deformation problem of the internal flow passage piece and the shell under a hot state environment is coordinated by the sealing sheets.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of aero-engines, and particularly relates to a structure of a fan-shaped test piece of a thrust chamber. BACKGROUND

[0002] The fan-shaped test of a thrust chamber refers to a simulation test of a thrust chamber according to a fan-shaped section. In order to be as close to the actual situation as possible, 1 / 6 or 1 / 8 fan-shaped sections are generally selected as test sections, and it is a kind of comprehensive simulation test. Since the fan-shaped test component is relatively simple, has the advantages of low cost and short cycle, and is widely used in the principle verification of the scheme design stage or the screening of multiple schemes.

[0003] The fan-shaped test piece of the thrust chamber is generally composed of a mixer, a diffuser, a stabilizer, a fuel nozzle, a heat shield, a shell and the like. The passage composed of the mixer, the diffuser, the heat shield and the like internal flow channel pieces separates the two gas streams with a large temperature, pressure and speed difference.

[0004] The shell is generally made of thin-walled sheet metal and is welded into a whole. In order to simplify the design and prevent gas leakage at the joint between the internal flow channel piece and the shell side wall, the internal flow channel piece and the shell side wall are generally welded into one body.

[0005] The connection mode of welding the internal flow channel piece and the shell side wall has the following disadvantages:

[0006] 1. The internal flow channel piece and the shell are both thin-walled sheet metal pieces. After the thrust chamber and the rear nacelle are integrated, the cavity passage formed is more complex. In order to be welded into a whole, the two are divided into a large number of thin-walled scattered pieces, the number of welds is greatly increased, the thermal deformation is difficult to control, and the processing difficulty and cost are greatly increased.

[0007] 2. After the internal flow channel piece and the shell are welded into a whole, due to the long-time scouring of the two gas streams with a large temperature difference, stress concentration occurs at the joint, deformation is difficult to release, cracks are prone to occur in the weld, and even fatigue failure occurs, and the service life is greatly shortened.

[0008] 3. After being welded into a whole, the internal flow channel piece cannot be replaced. In order to carry out the comparative study of multiple schemes of the flow channel piece, multiple sets of test pieces need to be processed as a whole, and the cost and cycle are greatly increased. For the internal replaceable piece such as the stabilizer, in order to carry out such research, a port cover needs to be designed and installed on the shell, thereby causing the structure of the shell to be complex and the strength to be greatly reduced. SUMMARY

[0009] In order to solve the above problems, the application provides a structure of a fan-shaped test piece of a thrust chamber, which comprises:

[0010] a shell and an internal flow channel piece installed in the shell;

[0011] The shell has a flow channel for installing an internal flow channel member; the internal flow channel member has a fan-shaped upper wall plate, a fan-shaped lower wall plate, and a support plate connecting the upper wall plate and the lower wall plate;

[0012] The upper wall plate has a pull rod mounting seat on the upstream radial outer side, one end of the pull rod is hinged to the pull rod mounting seat through a mounting bolt, and the other end of the pull rod is hinged to a mounting groove of the upper wall plate through a mounting bolt;

[0013] The upper wall plate has a plurality of circumferentially distributed supports on the downstream radial outer side, the supports are in the shape of a Chinese character 'zh', the supports have through holes, bolts pass through the through holes and mounting holes of the shell and are fixed through self-locking nuts;

[0014] Both sides of the upper wall plate and the lower wall plate have side plates, the side plates are lapped with the two side walls of the shell, and the side plates are provided with elastic sealing pieces on the contact surfaces with the two side walls of the shell, the elastic sealing pieces include fixed ends and cantilever ends, the fixed ends are fixed to the side plates through rivets, and the cantilever ends are tightly attached to the two side walls of the shell.

[0015] Preferably, the flow channel section of the shell is fan-shaped, and the two side wall surfaces of the shell have opening angles opening radially outward.

[0016] Preferably, the side plates are parallel to the two side wall surfaces of the shell to which they are lapped.

[0017] Preferably, the pull rod is an adjustable pull rod.

[0018] Preferably, both ends of the pull rod have ball heads sleeved, and the ball heads have through holes hinged to the mounting bolts.

[0019] Preferably, the internal flow channel member simulates the mixer, diffuser, and heat shield structural components of the afterburner.

[0020] Preferably, the upper wall plate, the lower wall plate, and the support plate are connected into a whole through welding or fasteners.

[0021] Preferably, the internal flow channel member and the shell have a certain amount of floating in the axial and radial directions.

[0022] The technical means for solving the above technical problems of the present application are: 1. The internal flow channel member is separated from the shell, the internal flow channel member is formed into a whole through welding or bolt connection, the front and rear ends are fixed to the upper wall of the shell by using adjustable pull rods and floating supports. 2. The two sides of the internal flow channel member are riveted with elastic sealing pieces, and the elastic sealing pieces are attached to the side walls of the shell.

[0023] Advantages:

[0024] 1. The internal flow channel member and the shell form two independent wholes, avoiding various problems caused by being welded into one whole.

[0025] 2. The internal flow channel piece side edge riveted elastic sheet solves the sealing problem of the intersection with the shell side wall.

[0026] 3. The adjustable pull rod, floating support and elastic sheet structure leave a floating amount in the axial and radial directions, and can coordinate the thermal expansion amount between the shell and the internal flow channel piece in the hot state.

[0027] 4. The adjustable pull rod and floating support are connected to the shell through bolts, and the internal flow channel elastic sheet is in pressure contact with the shell. This "floating fit" method has a certain adjustment amount, which facilitates disassembly and assembly.

[0028] 5. The elastic sheet, adjustable pull rod and floating support are simple in structure, convenient to manufacture, and have greatly reduced processing and assembly costs, with strong economic benefits. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a preferred embodiment of the present application Force combustion chamber sector test piece structure cross-sectional view;

[0030] Figure 2 is a preferred embodiment of the present application Internal flow channel piece structure

[0031] Figure 3 is Figure 2 the local enlarged view of F of

[0032] Figure 4 is a preferred embodiment of the present application Upstream port schematic diagram of the afterburner sector test piece;

[0033] Figure 5 is a preferred embodiment of the present application Afterburner sector test piece perspective view;

[0034] Figure 6 is a preferred embodiment of the present application Downstream port schematic diagram of the afterburner sector test piece. DETAILED DESCRIPTION

[0035] In order to make the technical solutions of the present application and its advantages clearer, the technical solutions of the present application will be further clearly and completely described below in combination with the drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present application, and are only used to explain the present application, but not to limit the present application. It should be noted that, for the sake of description, only parts related to the present application are shown in the drawings, and other related parts can be referred to the usual design. In the case of no conflict, the embodiments in the present application and the technical features in the embodiments can be combined to obtain new embodiments.

[0036] In addition, unless otherwise defined, technical terms or scientific terms used in the description of the present application shall be understood as the common meanings to those of ordinary skill in the art to which the present application belongs. The words "upper", "lower", "left", "right", "center", "vertical", "horizontal", "inner", "outer" and the like used in the description of the present application only indicate relative directions or positional relationships, and are not intended to imply that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and the relative positional relationship may change accordingly when the absolute position of the described object changes, and therefore cannot be understood as a limitation on the present application. The "first", "second", "third" and the like used in the description of the present application are only for the purpose of description, to distinguish different components, and cannot be understood as indicating or implying relative importance. The "one", "an" or "the" and the like used in the description of the present application should not be understood as an absolute limitation on the number, but should be understood as the presence of at least one. The "including" or "containing" and the like used in the description of the present application means that the elements or objects appearing before the word are encompassed by the elements or objects listed after the word and their equivalents, without excluding other elements or objects.

[0037] In addition, it should be further pointed out that, unless otherwise explicitly specified and limited, the "installation", "connection", "connection" and the like used in the description of the present application should be understood in a broad sense, for example, the connection can be fixed connection, or detachable connection, or integral connection; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium, or the connection between two elements, those skilled in the art can understand its specific meaning in the present application according to the specific circumstances.

[0038] As shown in Figures 1-6 A force combustion chamber sector test piece structure mainly consists of a shell 1, a mounting bolt 2, a ball head 3, a pull rod 4, an ear handle 5, a pull rod mounting seat 6, an internal flow passage piece 7, a rivet 8, a bracket 9, a bushing 10, a bolt 11, a self-locking nut 12, a side plate 13, and an elastic sealing sheet 14.

[0039] The shell 1 has a flow passage for mounting the internal flow passage piece 7, the flow passage cross section of the shell 1 is sector-shaped, and the two side wall surfaces of the shell 1 have an opening facing radially outward; the internal flow passage piece 7 has a sector-shaped upper wall plate 71, a sector-shaped lower wall plate 72, and a support plate 73 connecting the upper wall plate 71 and the lower wall plate 72; the internal flow passage piece 7 simulates the mixer, diffuser and heat shield structure components of the afterburner, the upper wall plate 71, the lower wall plate 72 and the support plate 73 are connected into a whole by welding or fasteners, and the internal flow passage piece 7 has a certain amount of floating in the axial and radial directions with respect to the shell 1.

[0040] The upper wall plate 71 has a pull rod mounting seat 6 on the upstream radial outer side, the pull rod mounting seat 6 is welded to the outer surface of the upper wall plate 71, one end of the pull rod 4 is hinged to the pull rod mounting seat 6 through the mounting bolt 2, and the other end of the pull rod 4 is hinged to the mounting groove of the upper wall plate 71 through the mounting bolt 2;

[0041] The upper wall plate 71 has a plurality of circumferentially distributed supports 9 on the downstream radial outer side, the supports 9 are in the shape of a Chinese character'', the supports 9 are riveted to the upper wall plate 71, the supports 9 have through holes, the bolts 11 pass through the through holes and the mounting holes of the shell 1 and are fixed through the self-locking nuts 12;

[0042] Both sides of the upper wall plate 71 and the lower wall plate 72 have side plates 13, the side plates 13 are lapped with the two side walls of the shell 1, the side plates 13 are parallel to the two side wall surfaces of the shell 1, respectively, and the side plates 13 are provided with elastic sealing pieces 14 on the contact surfaces with the two side walls of the shell 1, the elastic sealing pieces 14 include fixed ends and cantilever ends, the fixed ends are fixed to the side plates 13 through the rivets 8, and the cantilever ends are tightly attached to the two side walls of the shell 1.

[0043] In some optional embodiments, the pull rod 4 is an adjustable pull rod, and the two ends of the pull rod 4 are provided with ball heads 3.

[0044] The total assembly steps are as follows: the assembled inner flow channel piece 7 is pushed into the inner profile of the shell 1, after the support holes and the shell mounting holes and the pull rod and the mounting groove are aligned, the inner flow channel piece and the shell are fixed through the mounting bolts 2, the bolts 11, the bushings 10 and the self-locking nuts 12, respectively.

[0045] The present application realizes the "floating cooperation" of the inner flow channel piece and the shell, the side edges of the inner flow channel piece are provided with elastic sealing pieces, the problem that the airflow is prone to leakage at the intersection with the side walls of the shell is solved, and the sealing pieces coordinate the deformation of the inner flow channel piece and the shell under the thermal environment. The pull rod and the support both have a certain floating amount, which greatly avoids the problem that the thermal stress of the inner flow channel piece cannot be released. The assembly is simple, the disassembly is convenient, the multi-scheme design and verification are facilitated, and the advantages of the fan-shaped test piece are maximized.

[0046] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any skilled person in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A strutted combustor sector test article configuration, characterized by, The utility model relates to a kind of internal flow passage parts (7) and shell (1) of adjustable tension rod (4) and tension rod mounting seat (6) of adjustable tension rod (4) and tension rod mounting seat (6) are installed in shell (1) inside flow channel piece (7);Wherein, shell (1) has the flow channel of installing internal flow passage parts (7);Internal flow passage parts (7) have fan-shaped upper wall plate (71), fan-shaped lower wall plate (72) and the support plate (73) connecting upper wall plate (71) with lower wall plate (72);Upper wall plate (71) has tension rod mounting seat (6) on upstream radial outer side, one end of tension rod (4) is hinged on tension rod mounting seat (6) by mounting bolt (2), the other end of tension rod (4) is hinged in the mounting groove of upper wall plate (71) by mounting bolt (2);Upper wall plate (71) has multiple circumferentially distributed supports (9) on downstream radial outer side, support (9) is several characters, support (9) is provided with through hole, bolt (11) passes through the through hole and the mounting hole of shell (1) and is fixed by self-locking nut (12);Two sides of upper wall plate (71) and lower wall plate (72) are provided with side plate (13), side plate (13) is overlapped with the two side walls of shell (1), and elastic sealing sheet (14) is installed on the contact surface of side plate (13) and the two side walls of shell (1), and elastic sealing sheet (14) includes fixed end and cantilever end, the fixed end is fixed on side plate (13) by rivet (8), and the cantilever end is tightly attached to the two side walls of shell (1). The flow channel section of shell (1) is fan-shaped, and the two side wall surfaces of shell (1) have opening angles that open outward in the radial direction. The side plate (13) is parallel to the two side wall surfaces of shell (1) that it overlaps with, respectively. The tension rod (4) is an adjustable tension rod. Both ends of the tension rod (4) are provided with a ball head (3) that is sleeved, and the ball head (3) has a through hole that is hinged with the mounting bolt (2). The internal flow passage parts (7) simulate the mixer, diffuser and heat shield structure components of a thrust chamber.

2. The strutted combustor sector test piece structure of claim 1 wherein, The upper wall plate (71), lower wall plate (72) and support plate (73) are connected as a whole by welding or fasteners.

3. The strutted combustor sector test piece structure of claim 2 wherein, The internal flow passage parts (7) and shell (1) have a certain amount of floating in the axial and radial directions.

4. The strutted combustor sector test piece structure of claim 1 wherein, ​ 5. The strutted combustor sector test piece structure of claim 1 wherein, ​ 6. The strutted combustor sector test piece structure of claim 1 wherein, ​ 7. The strutted combustor sector test piece structure of claim 1 wherein, ​ 8. The strutted combustor sector test piece structure of claim 1 wherein, ​

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