Method for processing a splash baffle of an aircraft engine combustion chamber

Abstract

This invention discloses a method for processing a splash guard in an aero-engine combustor, relating to the field of aero-engine combustors. The method includes the following steps: S1, preparing a blank and processing the blank into a splash guard blank; wherein the splash guard blank is a circumferentially uniform annular component; S2, cutting the splash guard blank into multiple splash guard pieces; S3, processing an inner hole on each splash guard piece, and processing an annular structure surrounding the inner hole on the rear side of each splash guard piece. This invention, by processing the entire blank into a circumferentially uniform annular splash guard blank and then cutting the splash guard blank into multiple splash guard pieces, forms multiple splash guard pieces in one step, which has the advantages of saving time, convenient process, and better utilization of equipment resources.

Description

Technical Field

[0001] This invention relates to the field of aircraft engine combustion chambers, and more particularly to a method for manufacturing an aircraft engine combustion chamber splash guard. Background Technology

[0002] The combustion chamber splash plate is an important component of the head transition section assembly in the combustion chamber flame tube. It is in direct contact with the flame inside the combustion chamber and is subjected to high-temperature combustion gases.

[0003] Currently, most aero-engine combustors adopt an annular structure, with some using a single-annular cavity short annular structure. The combustor includes components such as the casing, nozzle, and flame tube. The flame tube head assembly is formed by brazing a head transition section to multiple splash guards, connecting the inner and outer rings and inner and outer caps of the flame tube, and also housing the main vortex generator. The splash guards are arranged circumferentially, with a certain distance maintained between adjacent circumferential splash guards to prevent them from rubbing against each other during engine operation.

[0004] The splash guard's structure is such that its upper and lower end faces are centrally symmetrical about the central axis of the entire combustion chamber, and its central hole and rear outer circle are also centrally symmetrical about the axis of the central hole. Therefore, the splash guard is machined using a process of bar milling, followed by wire cutting on both sides of the bar stock, and finally machining the central hole and outer circle. This machining process does not make good use of equipment resources, and due to the involvement of milling, the process is relatively complex and requires a large amount of human resources. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the existing technology in which the processing of combustion chamber splash plates is relatively complex and requires a lot of human resources, and to provide a processing method for aero-engine combustion chamber splash plates that saves time, is convenient in process, and makes better use of equipment resources.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] This invention provides a method for manufacturing a splash guard in an aero-engine combustion chamber, comprising the following steps:

[0008] S1. Configure a blank part and process the blank part into a splash guard blank part;

[0009] The splash guard component is a circumferentially uniform annular member.

[0010] S2. Cut the splash guard blank into multiple splash guard pieces;

[0011] S3. Machine an inner hole on each of the splash shield pieces, and machine an annular structure around the inner hole on the rear side of each of the splash shield pieces.

[0012] In this solution, the entire blank is machined into a ring-shaped, circumferentially uniform splash guard blank, and then the splash guard blank is cut into multiple splash guard disc pieces. Compared to milling each splash guard disc blank individually, this solution only requires overall shaping of one blank to obtain multiple splash guard disc pieces, eliminating the need to shape each individual bar stock. This allows for better utilization of equipment resources and cutting tools, saving processing time and labor costs. In this solution, when machining the ring structure and inner holes of each cut splash guard disc piece, the machining allowance is small and the process is simple because a large amount of scrap has already been removed during the previous step of machining the blank into the splash guard disc blank. Furthermore, since the splash guard disc pieces need to be circumferentially arranged at the head of the flame tube, obtaining multiple splash guard disc pieces by cutting from the same blank helps maintain the consistency of the splash guard disc pieces and the finished product qualification rate, while also allowing the splash guard disc pieces to be better arranged along the same circumference.

[0013] Preferably, the blank is a ring-rolled part, and in step S1, the blank is machined into the splash guard blank by turning.

[0014] In this solution, the blank is a ring-rolled part to facilitate processing into a ring-shaped splash guard blank; at the same time, the blank is ring-shaped, so it can be processed by turning, resulting in better roundness of the outer ring of the processed splash guard blank, and a good yield of single-piece splash guard blanks. In addition, the blank is directly turned on a lathe, which is technically mature, simple in process, and has high processing efficiency.

[0015] Preferably, in step S2, each of the splash guards is identical.

[0016] In this solution, the splash guard blank is uniformly cut into multiple identical splash guard pieces, which improves the standardization and interchangeability of the splash guard pieces and facilitates the quantitative cutting of the splash guard blank.

[0017] Preferably, in step S2, the splash guard blank is cut by wire cutting.

[0018] In this solution, wire cutting is used to cut the splash guard blank, which has high cutting precision, high cutting efficiency, and is less likely to generate dust.

[0019] Preferably, the splash guard plate includes a first flange, a second flange, and a central portion connected between the first flange and the second flange. The thickness of the central portion is greater than the thickness of the first flange and the thickness of the second flange. In step S3, the inner hole is machined on the central portion, and the outer periphery of the rear side of the central portion is machined into the annular structure.

[0020] In this design, the splash deflector plate is connected to the outer ring of the flame tube and the head transition section through the first and second flanges. The central part is used to block fuel and prevent atomized fuel from splashing onto the flame tube wall and causing local high-temperature erosion. After machining the inner hole on the central part, the outer peripheral edge of the rear side of the central part is machined into an outer circle, so that the rear side of the central part forms a ring structure around the inner hole, which meets the requirements of the splash deflector plate.

[0021] Preferably, in step S3, an inner hole is formed on the splash guard plate by machining.

[0022] In this solution, the inner hole is machined by turning, which has the advantages of convenient process, high efficiency and good inner hole roundness.

[0023] Preferably, in step S3, the portion of the splash guard located outside the edge of the inner hole is machined into the annular structure by turning.

[0024] In this solution, the ring structure is machined by turning, which has the advantages of convenient process, high efficiency, and good roundness of the outer circle of the ring structure.

[0025] Preferably, the splash deflector blank includes a first ring, a central ring, and a second ring, with the central ring connected between the first ring and the second ring; in step S2, after the splash deflector blank is cut, the first ring is cut into multiple first flanges, the second ring is cut into second flanges, and the central ring is cut into multiple central shapes.

[0026] In this solution, the first ring, the center ring, and the second ring are first machined on the blank. Then, the machined splash guard blank is cut. Since the first ring, the second ring, and the center ring are all ring-shaped, they are easy to machine using a lathe or other equipment. The splash guard blank is cut after it is machined, eliminating the need to perform the first flanging, the second flanging, and the shaping of the center part on each individual splash guard piece, thus improving machining efficiency and accuracy.

[0027] Preferably, the processing method further includes the following steps:

[0028] S4. Polish the individual pieces of the splash guard.

[0029] In this solution, after the splash guard plate completes the internal and external annular structures, it is polished to remove burrs and improve its assembly and performance.

[0030] Preferably, in step S2, the splash guard blank is cut into 20 splash guard pieces.

[0031] The positive and progressive effects of this invention are as follows:

[0032] This invention processes the entire blank into a splash guard blank, and then cuts the splash guard blank into multiple splash guard pieces. Thus, multiple splash guard pieces can be obtained by performing overall shaping processing on only one blank, without having to shape and process each individual bar stock, thereby improving processing efficiency. Furthermore, this invention can use a lathe to process the blank, thereby making better use of equipment resources, cutting tools, etc., and saving processing time and labor costs. Attached Figure Description

[0033] Figure 1 This is a three-dimensional structural diagram of a single splash guard plate according to an embodiment of the present invention.

[0034] Figure 2 This is a cross-sectional schematic diagram of a finished splash guard plate according to an embodiment of the present invention.

[0035] Figure 3 This is a three-dimensional structural diagram of a blank part according to an embodiment of the present invention.

[0036] Figure 4 This is a three-dimensional structural schematic diagram of a splash guard component according to an embodiment of the present invention.

[0037] Figure 5 This is a cross-sectional structural diagram of a splash guard component according to an embodiment of the present invention.

[0038] Figure 6 This is a schematic diagram of the structure of a splash guard blank after cutting, according to an embodiment of the present invention.

[0039] Figure 7 This is a schematic diagram of the structure of a single piece of the cut splash guard according to an embodiment of the present invention.

[0040] Figure 8 This is a cross-sectional schematic diagram of a single piece of the cut splash guard according to an embodiment of the present invention.

[0041] Figure 9 This is a schematic diagram illustrating the manufacturing process of a splash guard according to an embodiment of the present invention.

[0042] Explanation of reference numerals in the attached figures:

[0043] 100 blank parts

[0044] Splash guard blank 200

[0045] First ring component 210

[0046] Central ring 220

[0047] Second ring component 230

[0048] Splash guard plate 300

[0049] First flip 310

[0050] Central part 320

[0051] Second flip 330

[0052] Inner hole 340

[0053] 350 ring structure Detailed Implementation

[0054] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments.

[0055] The splash deflector includes multiple splash deflector pieces 300, which are evenly spaced along the circumference of the flame tube head to form an annular splash deflector at the flame tube head to block atomized fuel from splashing onto the flame tube and avoid causing localized ablation.

[0056] Reference Figure 1 and Figure 2 The splash guard 300 includes a first flange 310, a second flange 330, and a central portion 320 immediately connected between the first flange 310 and the second flange 330. The first flange 310 is used to connect to the head transition section of the flame tube, the second flange 330 is used to connect to the outer ring of the flame tube, and the central portion 320 is used to block fuel.

[0057] The splash deflector plate 300 is inclined to each other on both sides, so that the width of the splash deflector plate 300 gradually increases. That is, the width of the first flange 310 is smaller than the width of the central part 320, and the width of the central part 320 is smaller than the width of the second flange 330. This makes the splash deflector plate 300 fan-shaped, so that multiple splash deflector plates 300 can be assembled to form a frustum-shaped splash deflector when arranged circumferentially along the head of the flame tube.

[0058] The thickness of the central portion 320 is greater than the thickness of the first flange 310 and the second flange 330. An inner hole 340 is formed on the central portion 320, penetrating both its front and rear sides. An annular structure 350 is formed around the inner hole 340 on the rear side of the central portion 320. It should be noted that "front" here refers to the direction in which the splash deflector plate 300 faces the axis of the combustion chamber, and "rear" refers to the direction in which the splash deflector plate 300 faces away from the axis of the combustion chamber.

[0059] This embodiment discloses a method for processing a splash guard in an aero-engine combustion chamber, combined with... Figures 1-9 The processing method includes the following steps:

[0060] S1. Configure a blank part 100 and process the blank part 100 into a splash guard blank part 200.

[0061] The splash guard blank 200 is a circumferentially uniform annular component, which facilitates subsequent cutting and other processing of the splash guard blank 200; the blank 100 is a ring-rolled part, which facilitates the acquisition of raw materials and the processing of the blank 100 into an annular splash guard blank 200.

[0062] Step S1 includes the following steps:

[0063] S11. Fix the blank 100 onto the lathe and start the lathe;

[0064] S12. Control the lathe to feed and cut the blank 100, and cut the blank 100 into a ring-shaped splash guard blank 200.

[0065] S13. Turn off the lathe and remove the splash guard blank 200 from the lathe.

[0066] The splash guard blank 200 includes a first ring 210, a central ring 220, and a second ring 230 with the same axis. The central ring 220 connects the first ring 210 and the second ring 230, and the diameter of the first ring 210 is smaller than the diameter of the central ring 220, and the diameter of the central ring 220 is smaller than the diameter of the second ring 230. The entire splash guard blank 200 is centrally symmetrical, so it can be directly rotary-cut using a lathe. Currently, among various metal cutting machines, the lathe is the most widely used type, accounting for about 50% of the total number of machine tools, and is the most widely used processing equipment in mechanical manufacturing. Using a lathe for processing has advantages such as saving equipment, convenient process, easy operation, high processing efficiency, and good roundness.

[0067] In addition, in other embodiments, other suitable processing methods can be used to cut the blank 100 to obtain the required splash guard blank 200.

[0068] S2. Cut the splash guard blank 200 into multiple splash guard pieces 300;

[0069] Place the splash guard blank 200 on a cutting machine and cut the splash guard blank 200 into multiple fan-shaped splash guard pieces 300; cut the first ring 210 into multiple first flanges 310, cut the second ring 230 into multiple second flanges 330, and cut the center ring 220 into multiple center parts 320.

[0070] Compared to machining the first flange 310, the second flange 330, and the center section 320 into each individual splash guard plate 300, this solution only requires rotating and cutting the first ring 210, the second ring 230, and the center ring 220 from a single blank 100, and then performing overall cutting to obtain multiple splash guard plate individual pieces 300. This allows for better use of equipment resources and cutting tools, saving processing time and labor costs. In addition, since the splash guard plate individual pieces 300 need to be arranged circumferentially at the head of the flame tube, the multiple splash guard plate individual pieces 300 obtained by cutting the same splash guard plate blank 200 in this solution can be better arranged along the same circumference.

[0071] The cutting method of the splash guard blank 200 can be selected according to the requirements. In this embodiment, wire cutting is selected to cut the splash guard blank 200, which has high cutting accuracy, high cutting efficiency and is less likely to generate dust.

[0072] In this embodiment, the splash shield blank 200 is cut into equal parts so that each splash shield piece 300 has the same shape and size, which makes the standardization of the splash shield piece 300 better, the interchangeability better, and also facilitates the quantitative cutting of the splash shield blank 200.

[0073] In this embodiment, the splash shield blank 200 is cut into 20 splash shield pieces 300 to meet the usage requirements of the flame tube.

[0074] In addition, in other embodiments, the splash guard blank 200 can also be cut into other quantities and other shapes as needed.

[0075] S3. Machining an inner hole 340 on each splash guard plate 300, and machining an annular structure 350 around the inner hole 340 on the rear side of each splash guard plate 300.

[0076] One approach is to first machine an inner hole 340 on the splash plate 300, and then machine an annular structure 350 with the center of the inner hole 340 as a reference; another approach is to first machine an annular structure 350 on the outer periphery of the rear side of the central part 320, and then machine an inner hole 340 with the center of the annular structure 350 as a reference.

[0077] In this embodiment, a lathe is used to machine the inner hole 340 and the annular structure 350 of the splash guard plate 300. The splash guard plate 300 is fixed on the lathe, and the inner hole 340 penetrating the central portion 320 is machined on the central portion 320. The outer circle is machined on the outer periphery of the rear side of the central portion 320, so that the outer periphery of the central portion 320 forms an annular structure 350 surrounding the inner hole 340 and coaxial with the inner hole 340. Since the thickness of the central portion 320 is greater than the thickness of the first flange 310 and the second flange 330, it is convenient to machine the outer circle on the outer periphery of the central portion 320.

[0078] In this embodiment, the inner hole 340 and the annular component 350 of the splash shield 300 are machined by turning, which has the advantages of convenient process, high efficiency, and good roundness of the inner hole 340. In addition, in other embodiments, other suitable methods can also be used to machine the inner hole 340 and the annular component 350 of the splash shield 300.

[0079] When machining the annular structure 350 and inner hole 340 on each cut splash guard plate 300, a large amount of scrap material has been removed in the previous step when the blank 100 was machined into splash guard plate blank 200, resulting in a small machining allowance and simple process in this step.

[0080] S4. Grind the 300mm single piece of the splash guard.

[0081] After the inner hole 340 and the outer annular structure 350 are machined on the splash guard plate 300, the splash guard plate 300 is polished to remove burrs and improve the assembly and use performance of the splash guard plate 300.

[0082] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A method for processing a splash guard in the combustion chamber of an aero-engine, characterized in that, Includes the following steps: S1. Configure a blank part and process the blank part into a splash guard blank part; The splash guard component is a circumferentially uniform annular member. S2. Cut the splash guard blank into multiple splash guard pieces; S3. Machine an inner hole on each of the splash shield pieces, and machine an annular structure around the inner hole on the rear side of each of the splash shield pieces; The splash deflector plate includes a first flange, a second flange, and a central portion connected between the first flange and the second flange; The splash deflector blank includes a first ring, a central ring, and a second ring, with the central ring connected between the first ring and the second ring; in step S2, after the splash deflector blank is cut, the first ring is cut into multiple first flanges, the second ring is cut into second flanges, and the central ring is cut into multiple central shapes.

2. The method for processing the aero-engine combustion chamber splash deflector as described in claim 1, characterized in that, The blank is a ring-rolled part. In step S1, the blank is machined into the splash guard blank by turning.

3. The method for processing the splash guard of the aero-engine combustion chamber as described in claim 1, characterized in that, In step S2, each of the splash guards is identical.

4. The method for processing the splash guard of the aero-engine combustion chamber as described in claim 1, characterized in that, In step S2, the splash guard blank is cut using wire cutting.

5. The method for processing the splash guard of the aero-engine combustion chamber as described in claim 1, characterized in that, The thickness of the central part is greater than the thickness of the first flange and the thickness of the second flange. In step S3, the inner hole is machined on the central part, and the outer periphery of the rear side of the central part is machined into the annular structure.

6. The method for processing the splash guard of the aero-engine combustion chamber as described in claim 1 or 5, characterized in that, In step S3, an inner hole is formed on the splash guard plate by machining.

7. The method for processing the aero-engine combustion chamber splash deflector as described in claim 6, characterized in that, In step S3, the portion of the splash guard located outside the edge of the inner hole is machined into the annular structure by turning.

8. The method for processing the splash guard of the aero-engine combustion chamber as described in claim 1, characterized in that, The processing method further includes the following steps: S4. Polish the individual pieces of the splash guard.

9. The method for processing the splash guard of the aero-engine combustion chamber as described in claim 1, characterized in that, In step S2, the splash guard blank is cut into 20 splash guard pieces.

Images