Sealing test device for welded multi-line complex fuel nozzles

Abstract

The sealing performance testing device for a welded multi-oil-path complex fuel nozzle of the present invention includes a first pressure plate, a second pressure plate, and a third pressure plate. The first pressure plate and the third pressure plate are combined, or the first pressure plate or the second pressure plate is combined, and the two ends of a first base can be fastened by screws. The central area of ​​the first pressure plate has a groove adapted to the bottom end of the first base. The central area of ​​the second pressure plate is provided with a first rod in a threaded manner. One end of the first rod can seal the intermediate nozzle, and the other end is a free-rotating end. The fourth pressure plate and the fifth pressure plate are fastened to the second base by screws. The fourth pressure plate is provided with a second rod in a threaded manner. One end of the second rod is provided with a second plug that can seal one end of the oil collecting chamber. The fifth pressure plate is provided with multiple second bosses on one side and a third rod in a threaded manner in the central area. The second bosses are used to seal the fuel injector, and one end of the third rod is used to seal the fuel injector at the other end of the oil collecting chamber, thereby improving the efficiency of component sealing performance testing.

Description

Technical Field

[0001] This invention belongs to the technical field of remanufacturing of key components of aero-engines, and particularly relates to a sealing test device for a welded multi-oil-path complex fuel nozzle. Background Technology

[0002] Fuel nozzles are crucial components of the fuel manifold in the main combustion chamber of an aero-engine. A typical fuel nozzle assembly consists of a main nozzle, a secondary nozzle, and a nozzle housing. Sealing relies on a double seal at the nozzle end face, a conical surface at the external connection points, or an exposed argon arc weld. The sealing performance is checked at the conical surface or weld seams. For complex, newly assembled structures such as the main nozzle, secondary nozzle, and nozzle housing within the fuel nozzle, the quality of the brazed welds must ultimately ensure no fuel leakage between the main fuel line and the secondary fuel line, and between the secondary fuel line and the first and second fuel lines. Furthermore, multiple brazed and argon arc weld seams must pass sealing tests.

[0003] Currently, conventional sealing methods require three sets of sealing test equipment to be clamped three times, which is costly and cumbersome to operate, resulting in low overall efficiency in testing the sealing performance of parts. Summary of the Invention

[0004] In view of this, the sealing performance testing device for welded multi-oil-path complex fuel nozzles of the present invention solves the technical problem of low efficiency in testing the sealing performance of parts by existing devices.

[0005] A sealing performance testing device for a welded multi-channel complex fuel nozzle is disclosed. The fuel nozzle includes a first base and a second base. A main fuel channel, a secondary fuel channel, and a first fuel channel are formed between the first and second bases. A second fuel channel communicating with the main fuel channel is formed within the second base. A weld E for isolating the main fuel channel and the secondary fuel channel is provided within the first base. A weld F for isolating the first fuel channel and the second fuel channel is provided within the second base. A fuel injection hole of the second base forms a weld H with the main fuel channel. A fuel injection hole of the second base forms a weld N with the second fuel channel. A fuel injection hole of the second base forms a weld M with the fuel injection hole. A central nozzle is provided on the top surface of the first base, and a fuel inlet nozzle and a fuel inlet hole are provided on the outer annular surface. Multiple fuel injectors and a fuel collection chamber are provided at the top of the second base.

[0006] A first pressure plate, a second pressure plate, and a third pressure plate, wherein the first pressure plate and the third pressure plate are combined, or the first pressure plate or the second pressure plate is combined, can be fastened to both ends of the first base body by screws. The first pressure plate has a groove in the central area that is adapted to the bottom end of the first base, and a first hole is formed in the center of the groove for the passage of the pipe between the first base and the second base. The first rod is threaded in the central area of ​​the second pressure plate. One end of the first rod can seal the middle nozzle, and the other end can rotate freely. The third pressure plate has an arc-shaped rod on its side and a first protrusion on its bottom surface that can seal the middle nozzle. The free end of the arc-shaped rod is provided with a first plug that can seal the oil inlet hole. The fourth and fifth pressure plates are fastened to the second base by screws. The fourth pressure plate is provided with a second rod in a threaded manner, and one end of the second rod is provided with a second plug that can seal one end of the oil collection chamber. The fifth pressure plate is provided with multiple second bosses on one side and a third rod in a threaded manner in the central area. The second bosses are used to seal the fuel injector, and one end of the third rod is used to seal the fuel injector at the other end of the oil collection chamber.

[0007] The beneficial effects of the present invention are as follows: This sealing test device not only checks for oil leakage between the main and auxiliary oil circuits, but also checks the sealing of multiple welds in brazing and argon arc welding. The sealing test can be completed in just two clamping operations, reducing costs and processing time. It is simple to operate and reduces the number of fixtures. It breaks away from the conventional method of sealing by external connecting parts with conical surfaces or by external caps being argon arc welded. It is the first time that the sealing technology of welded multi-oil circuit complex nozzles has been mastered. Attached Figure Description

[0008] To more clearly illustrate the technical solutions of the embodiments of this disclosure, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0009] Figure 1 A schematic diagram showing the oil passages for the first and second substrates; Figure 2 A schematic diagram of the assembly of the first and third pressure plates; Figure 3 A schematic diagram illustrating the assembly of the first and second pressure plates; Figure 4 This is a schematic diagram of setting up an arc-shaped rod, where, 11. First pressure plate; 12. Second pressure plate; 13. Third pressure plate; 21. Fourth pressure plate; 22. Fifth pressure plate; 121. First rod; 131. First boss; 132. Arc rod; 211. Second rod; 221. Third rod. Detailed Implementation

[0010] The embodiments of this disclosure will now be described in detail with reference to the accompanying drawings.

[0011] The following specific examples illustrate the implementation of this disclosure. Those skilled in the art can easily understand other advantages and effects of this disclosure from the content disclosed in this specification. Obviously, the described embodiments are only a part of the embodiments of this disclosure, and not all of them. This disclosure can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this disclosure. It should be noted that, in the absence of conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0012] It should be noted that various aspects of embodiments within the scope of the appended claims are described below. It will be apparent that the aspects described herein can be embodied in a wide variety of forms, and any particular structure and / or function described herein is merely illustrative. Based on this disclosure, those skilled in the art will understand that one aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects set forth herein can be used to implement the device and / or practice the method. Additionally, this device and / or method can be implemented using other structures and / or functionalities besides one or more of the aspects set forth herein.

[0013] like Figures 1 to 4 The figure shows a sealing performance testing device for a welded multi-channel complex fuel nozzle. The fuel nozzle includes a first base and a second base. A main fuel channel, a secondary fuel channel, and a first fuel channel are formed between the first and second bases. A second fuel channel is formed within the second base and communicates with the main fuel channel. A weld E is provided in the first base to isolate the main fuel channel and the secondary fuel channel. A weld F is provided in the second base to isolate the first fuel channel and the second fuel channel. A fuel injection hole in the second base forms a weld H with the main fuel channel, a weld N with the second fuel channel, and a weld M with the fuel injection hole. The top surface of the first base has a central nozzle, and the outer ring surface has a fuel inlet nozzle (supplying fuel to the secondary fuel channel) and a fuel inlet hole (supplying fuel to the main fuel channel). The top of the second base has multiple fuel injectors (communicating with the main fuel channel, secondary fuel channel, first fuel channel, and second fuel channel) and a fuel collection chamber (supplying fuel independently during operation and communicating with the first fuel channel). The first pressure plate 11, the second pressure plate 12, and the third pressure plate 13, wherein the first pressure plate 11 and the third pressure plate 13 are combined, or the first pressure plate 11 or the second pressure plate 12 is combined, can be fastened to both ends of the first base body by screws. The first pressure plate 11 has a groove in the central area that is adapted to the bottom end of the first base, and a first hole is provided in the center of the groove for the passage of the pipe between the first base and the second base. The second pressure plate 12 has a first rod 121 threaded in the central area. One end of the first rod 121 can seal the middle nozzle, and the other end can rotate freely. The third pressure plate 13 has an arc-shaped rod 132 on its side and a first boss 131 on its bottom surface that can seal the middle nozzle. The free end of the arc-shaped rod 132 is provided with a first plug that can seal the oil inlet hole. The fourth pressure plate 21 and the fifth pressure plate 22 are fastened to the second base by screws. The fourth pressure plate 21 is provided with a second rod 211 by means of threads. One end of the second rod 211 is provided with a second plug that can seal one end of the oil collection chamber. The fifth pressure plate 22 is provided with multiple second bosses on one side and a third rod 221 by means of threads in the central area. The second bosses are used to seal the fuel injector, and one end of the third rod 221 is used to seal the fuel injector at the other end of the oil collection chamber.

[0014] In one embodiment, the first rod 121, the second rod 211, and the third rod 221 are all threaded rods, which can quickly provide sealing conditions for the corresponding holes upon rotation. Sealing assemblies are installed at the sealing ends of the first rod 121, the second rod 211, and the third rod 221, and sealing assemblies are also provided at the ends of the first boss 131 and the second boss. For example, they can be installed using a slotted assembly method or other methods. The sealing assemblies can use common hole and slot sealing parts available in the prior art, such as O-rings, plugs, gaskets, and sealing rings.

[0015] The device uses only two sets of pressure plates to complete the overall sealing test of the parts. The fourth pressure plate 21 and the fifth pressure plate 22 clamp the second base and do not need to be replaced. Only the second pressure plate 12 or the third pressure plate 13 needs to be replaced.

[0016] Secondly, a method for testing the sealing performance of a welded, multi-channel complex fuel nozzle is provided, employing some or all of the aforementioned devices, wherein... This includes the inspection of weld E between the main oil passage and the auxiliary oil passage, among which, The first base is fastened by the first pressure plate 11 and the third pressure plate 13, and the middle nozzle is sealed by the first boss 131 and the oil inlet is sealed by the first plug; the two ends of the oil collection chamber are sealed by rotating the second rod 211 and the third rod 221, and no sealing components are assembled on the second boss corresponding to the oil nozzle of the main oil circuit. The oil inlet nozzle supplies oil to the negative oil circuit through the oil supply device. The oil supply pressure is 10 MPa and is maintained for 10-20 minutes. Check whether the main oil circuit nozzle is dispensing oil. If it is, the quality of weld E is unqualified. If not, the quality of weld E is qualified. Afterward, the test oil is recovered through the oil supply device.

[0017] This includes the inspection of welds F, H, M, and N between the main oil circuit and the auxiliary oil circuit. The first base is secured by the first pressure plate 11 and the second pressure plate 12. The first rod 121 is rotated to seal the intermediate nozzle. The oil inlet is sealed by a plug. The oil inlet is connected to the oil supply device through the oil supply pipe. The second protrusion is equipped with a sealing component to seal all the fuel injectors. The third rod 221 is rotated to seal one end of the oil collection chamber. The sealing component at one end of the second rod 211 is disassembled and the long strip of test paper is fixed. The oil supply device supplies oil to the oil inlet through the oil supply pipe, which enters the main oil circuit and the second oil circuit. The oil supply pressure is 10Mpa-15Mpa and is maintained for 20min-30min. Rotate the second rod 211 to move the test paper along the axial direction of the oil collection chamber and check whether there is test oil on the test paper. If so, the quality of welds F, H, M and N is unqualified; if not, the quality of welds F, H, M and N is qualified.

[0018] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this disclosure should be included within the scope of protection of this disclosure. Therefore, the scope of protection of this disclosure should be determined by the scope of the claims.

Claims

1. A sealing performance testing device for a welded multi-channel complex fuel nozzle, the fuel nozzle comprising a first base and a second base, wherein a main fuel channel, a secondary fuel channel, and a first fuel channel are formed between the first base and the second base; a weld E for isolating the main fuel channel and the secondary fuel channel is provided in the first base; a weld F for isolating the first fuel channel and the second fuel channel is provided in the second base; a weld H is formed between the injection hole of the second base and the main fuel channel; a weld N is formed between the injection hole of the second base and the second fuel channel; a weld M is formed between the second base and the injection hole; the first base is provided with an intermediate nozzle, an inlet nozzle, and an inlet hole; and the top of the second base is provided with multiple injection nozzles and an oil collection chamber, characterized in that… include, A first pressure plate, a second pressure plate, and a third pressure plate, wherein the first pressure plate and the third pressure plate are combined, or the first pressure plate or the second pressure plate is combined, can be fastened to both ends of the first base body by screws. The first pressure plate has a groove in the central area that is adapted to the bottom end of the first base, and a first hole is formed in the center of the groove for the passage of the pipe between the first base and the second base. The first rod is threaded in the central area of ​​the second pressure plate. One end of the first rod can seal the middle nozzle, and the other end can rotate freely. The third pressure plate has an arc-shaped rod on its side and a first protrusion on its bottom surface that can seal the middle nozzle. The free end of the arc-shaped rod is provided with a first plug that can seal the oil inlet hole. The fourth and fifth pressure plates are fastened to the second base by screws. The fourth pressure plate is provided with a second rod in a threaded manner, and one end of the second rod is provided with a second plug that can seal one end of the oil collection chamber. The fifth pressure plate is provided with multiple second bosses on one side and a third rod in a threaded manner in the central area. The second bosses are used to seal the fuel injector, and one end of the third rod is used to seal the fuel injector at the other end of the oil collection chamber.

2. The sealing performance testing device according to claim 1, characterized in that, The first, second, and third rods are all threaded rods.

3. The sealing performance testing device according to claim 2, characterized in that, The sealing ends of the first rod, the second rod, and the third rod are all equipped with sealing components; the ends of the first boss and the second boss are equipped with sealing components.

4. The sealing performance testing device according to claim 3, characterized in that, The sealing assembly includes an O-ring, a plug, a gasket, and a sealing ring.

5. A method for testing the sealing performance of a welded multi-line complex fuel nozzle, characterized in that, Use the sealing test device as described in any one of claims 1 to 4.

6. The sealing performance testing method according to claim 5, characterized in that, This includes the inspection of weld E between the main oil passage and the auxiliary oil passage, among which, The first base is secured using the first pressure plate and the third pressure plate, and the middle nozzle is sealed by the first boss and the oil inlet is sealed by the first plug; the two ends of the oil collection chamber are sealed by rotating the second rod and the third rod, and no sealing components are assembled on the second boss corresponding to the oil nozzle of the main oil circuit. The oil inlet nozzle supplies oil to the negative oil circuit through the oil supply device. The oil supply pressure is 10 MPa and is maintained for 10-20 minutes. Check whether the main oil circuit nozzle is dispensing oil. If it is, the quality of weld E is unqualified. If not, the quality of weld E is qualified. Afterward, the test oil is recovered through the oil supply device.

7. The sealing performance testing method according to claim 6, characterized in that, This includes the inspection of welds F, H, M, and N between the main oil circuit and the auxiliary oil circuit. The first base is secured using the first and second pressure plates, the first rod is rotated to seal the intermediate nozzle, and the oil inlet is sealed with a plug. The oil inlet is connected to the oil supply device through the oil supply pipe. The second protrusion is equipped with a sealing component to seal all the fuel injectors. The third rod is rotated to seal one end of the oil collection chamber. The sealing component at one end of the second rod is disassembled and the long strip of test paper is fixed. The oil supply device supplies oil to the oil inlet through the oil supply pipe, which enters the main oil circuit and the second oil circuit. The oil supply pressure is 10Mpa-15Mpa and is maintained for 20min-30min. Rotate the second rod to move the test paper along the axial direction of the oil collection chamber. Check if there is test oil on the test paper. If so, the quality of welds F, H, M and N is unqualified. If not, the quality of welds F, H, M and N is qualified.

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