A universal fuel main test fixture

Abstract

The present invention discloses a universal fuel main test fixture, the test fixture comprises a mounting plate, a mounting seat and a pipe joint; the mounting plate is provided with a plurality of displacement grooves; the mounting seat is located in the displacement grooves; the mounting seat is detachably connected to the pipe joint in the displacement grooves; the mounting seat is provided with a first through hole, and when the mounting seat is connected to the pipe joint, the first through hole is communicated with the pipe joint; the mounting seat comprises a conduit, a support rod, a clamping rod and a mounting platform, and extension components are arranged on both sides of the upper part of the support rod, and the extension component close to the first through hole has a second through hole, and the clamping rod is detachably connected to the second through hole. The universal fuel main test fixture of the present invention realizes the function of one test fixture to meet the test of multiple types of fuel mains, and different types of fuel mains no longer need to be processed with special test fixtures, which reduces the development cost; in addition, the clamping rod clamps the nozzle of the fuel main, reduces the risk of oil leakage from the nozzle, and improves the test efficiency and safety.

Description

Technical Field

[0001] The invention relates to the technical field of fuel main pipe test devices, in particular to a universal fuel main pipe test fixture. Background Art

[0002] The flow non-uniformity of the fuel manifold has a very important impact on the comprehensive performance parameters of the aircraft engine combustion chamber. Therefore, a large number of fuel manifold flow non-uniformity tests need to be carried out in the development of the combustion chamber. Among them, the test fixture serves as an intermediary between the fuel manifold and the measurement system. The schematic diagram of the existing test fixture structure is shown in the figure. Figure 1 shown. Figure 2 A schematic diagram of using an existing test fixture to conduct a flow unevenness test on a fuel main pipe is shown. One end of the test fixture is connected to the fuel main pipe to play a role in installation and fixing, and the other end is connected to the oil pipe. The fuel sprayed from each nozzle on the fuel main pipe is introduced into the measurement system to obtain the flow unevenness of the fuel main pipe.

[0003] Although the existing test fixture has a simple structure, the number and spacing of nozzles in the fuel manifolds of different power levels or different types of aircraft engine combustion chambers are different, resulting in the existing test fixtures not being universal. Therefore, each type of fuel manifold needs to be processed with a dedicated test fixture, resulting in a waste of resources and increased manufacturing costs. In addition, since the measurement system is universal, each time before conducting a fuel manifold flow unevenness test, it is necessary to find a test fixture specifically for this type of fuel manifold and reconnect the oil pipe, which results in very low test efficiency. In addition, the connection between the test fixture and the oil pipe is difficult to seal, and multiple assembly and disassembly can easily cause oil leakage at the connection, resulting in inaccurate test data and safety hazards. Summary of the invention

[0004] In order to solve the problems existing in the prior art, the present invention provides a universal fuel main pipe test fixture, the fixture comprising: a mounting plate, a mounting seat, a pipe joint and a displacement groove;

[0005] The mounting plate is provided with a plurality of displacement slots;

[0006] The mounting seat is located in the displacement slot;

[0007] The mounting seat and the pipe joint are detachably connected in the displacement groove;

[0008] The mounting seat is provided with a first through hole, and when the mounting seat is connected to the pipe joint, the first through hole is communicated with the pipe joint.

[0009] Furthermore, the mounting base includes a guide tube, a support rod, a pressing rod and a mounting platform.

[0010] The first through hole is located at one end of the upper part of the mounting platform, and the support rod is fixed at the other end of the upper part of the mounting platform;

[0011] The support rod is detachably connected to the pressing rod;

[0012] The conduit is located at the lower part of the mounting platform and communicates with the first through hole;

[0013] The conduit and the pipe joint are detachably connected, and the conduit and the pipe joint are communicated with each other when connected.

[0014] Furthermore, extension components are arranged on both sides of the upper part of the support rod, and the extension component close to the first through hole is provided with a second through hole.

[0015] The pressing rod is detachably connected to the second through hole.

[0016] Furthermore, the mounting plate structure is annular.

[0017] Furthermore, the mounting plate has a thickness of 5 to 10 mm, an outer diameter of 300 to 350 mm, and an inner diameter of 50 to 100 mm.

[0018] Furthermore, the displacement groove is a strip structure.

[0019] Furthermore, the displacement grooves are evenly arranged along the mounting plate.

[0020] Furthermore, the number of the displacement slots is 6 to 20.

[0021] Furthermore, the displacement groove has a groove width of 4 to 10 mm and a groove length of 50 to 200 mm.

[0022] Furthermore, the disassembly connections are all threaded disassembly connections.

[0023] Compared with the prior art, the universal fuel main pipe test fixture of the present invention has the following beneficial effects:

[0024] The test fixture of the present invention comprises a mounting plate, a mounting seat and a pipe joint, and the mounting seat comprises a conduit, a support rod, a clamping rod and a mounting platform. By designing a plurality of displacement grooves on the mounting plate, the conduit and the pipe joint of the mounting seat are disassembled and connected in the displacement groove, and the circumferential spacing of the conduit is changed, so that one test fixture can meet the function of testing multiple types of fuel main pipes (different numbers of nozzles, different nozzle spacings), and different types of fuel main pipes no longer need to be processed with special test fixtures, thereby reducing the development cost; the present invention has universality and can be fixedly connected to the test oil pipe, solving the chronic problem of reconnecting the oil channel before each test; the support rod and the clamping rod of the present invention are disassembled and connected by threads, giving the clamping rod the ability to move up and down, and can clamp the nozzle of the fuel main pipe, thereby reducing the risk of nozzle oil leakage and improving the test efficiency and safety.

[0025] Other features and advantages of the present invention will be described in the following description, and partly become obvious from the description, or be understood by implementing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0027] Figure 1 A schematic diagram of the structure of an existing test fixture is shown;

[0028] Figure 2 Schematic diagram of a fuel manifold flow non-uniformity test using an existing test fixture;

[0029] Figure 3 A schematic structural diagram of a universal fuel main pipe test fixture in an embodiment of the present invention is shown;

[0030] Figure 4 A schematic diagram of the structure of a mounting base in an embodiment of the present invention is shown;

[0031] Figure 5 A schematic structural diagram of a pipe joint in an embodiment of the present invention is shown;

[0032] Figure 6 A schematic diagram of the structure of a test fixture for assembling a fuel main pipe with 18 nozzles in an embodiment of the present invention is shown;

[0033] Figure 7 A top view of a test fixture for assembling a fuel manifold with 18 nozzles according to an embodiment of the present invention is shown;

[0034] Figure 8 A top view of a test fixture for assembling a fuel manifold with 12 nozzles according to an embodiment of the present invention is shown.

[0035] Description of reference numerals:

[0036] 1. Mounting plate; 2. Mounting seat; 21. Mounting platform; 22. First through hole; 23. Support rod; 24. Pressing rod; 25. Conduit; 26. Second through hole; 3. Pipe joint; 4. Displacement groove; 5. Fuel main pipe; 51. Nozzle. DETAILED DESCRIPTION

[0037] The following will be combined with the specific embodiments of the present invention and the drawings of the specification to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Aiming at the problems that the existing fuel main pipe flow unevenness test fixture is not universal, resulting in low test efficiency, and the connection between the test fixture and the oil pipe is difficult to seal, which easily causes oil leakage at the connection, inaccurate test data and safety hazards, the present invention provides a universal fuel main pipe test fixture.

[0039] Reference Figure 3 to Figure 5 , an embodiment of the present invention provides a universal fuel main pipe test fixture.

[0040] Reference Figure 3 The schematic diagram of the structure of the universal fuel main test fixture is shown in FIG. The test fixture includes a mounting plate 1, a mounting seat 2, a pipe joint 3 and a displacement groove 4. There are 18 mounting plates 1, mounting seats 2, pipe joints 3 and displacement grooves 4. The mounting plate 1 is in a circular ring structure, and the displacement groove 4 is a strip structure. The mounting seat 2 is located in the displacement groove of the strip structure. The mounting seat 2 is provided with a first through hole 22. When the mounting seat 2 is connected to the pipe joint 3, the first through hole 22 communicates with the pipe joint 3. The mounting seat 2 and the pipe joint 3 are detachably connected in the displacement groove 4 of the strip structure. The mounting seat 2 can move on the displacement groove 4 of the strip structure. When the pipe joint 3 is fastened to the mounting seat 2, the pipe joint 3 and the mounting seat 2 can be fixed on the mounting plate 1. The circumferential spacing between adjacent pipe joints 3 is b. Specifically, in this embodiment, the mounting plate 1 is 10 mm thick, 300 mm in outer diameter, and 100 mm in inner diameter. The displacement groove 4 of the strip structure has a groove width of 10 mm and a groove length of 150 mm.

[0041] Reference Figure 4 The schematic diagram of the structure of the mounting base 2 is shown, the mounting base 2 includes a conduit 25, a support rod 23, a clamping rod 24 and a mounting platform 21, the first through hole 22 is located at one end of the upper part of the mounting platform 21, the support rod 23 is fixed at the other end of the upper part of the mounting platform 21, the support rod 23 is detachably connected with the clamping rod 24, the conduit 25 is located at the lower part of the mounting platform 21, and communicates with the first through hole 22. Specifically, extension components are provided on both sides of the upper part of the support rod 23, the extension component close to the first through hole 22 has a second through hole 26, and the clamping rod 24 is detachably connected with the second through hole 26. The structure in which the clamping rod 24 is detachably connected with the second through hole 26 can give the clamping rod 24 the ability to move up and down.

[0042] Reference Figure 5 The pipe joint 3 is a schematic structural diagram of the pipe joint 3, which is a hollow cylindrical structure with a through-hole hexagonal prism fixing piece connected to the upper end. Figure 4 The pipe joint 3 and the conduit 25 are detachably connected. When the pipe joint 3 and the conduit 25 are connected, the pipe joint 3 and the conduit 25 are communicated.

[0043] In this embodiment, the pipe joint 3 and the conduit 25 are detachably connected, and the pressing rod 24 and the second through hole 26 are detachably connected by threads. In this embodiment, the mounting plate 1 is in a circular ring structure, which can also be adjusted to other shapes in actual application; the number of displacement grooves 4 in a strip structure is 18, which can also be set to 6 to 20; the shape of the displacement grooves 4 is not limited to a strip structure, and can also be other shapes, but the displacement grooves 4 need to be evenly arranged along the mounting plate 1.

[0044] The parameters of the mounting disk 1 and the displacement groove 4 of the strip structure are not limited to the parameters of the mounting disk 1 and the displacement groove 4 of the strip structure given in the present embodiment. Preferably, the parameter range of the mounting disk 1 is 5 to 10 mm in thickness, 300 to 350 mm in outer diameter, and 50 to 100 mm in inner diameter; the parameter range of the displacement groove 4 of the strip structure is 4 to 10 mm in width and 50 to 200 mm in length.

[0045] Refer to the following Figure 6 to Figure 8 The use method and principle of a universal fuel main pipe test fixture according to an embodiment of the present invention are explained.

[0046] Reference Figure 6 Schematic diagram of the structure of the test fixture for assembling the fuel main pipe 5 with 18 nozzles 51, the spacing between the nozzles 51 is a, the mounting seat 2 moves on the displacement groove 4 of the strip structure, and when it reaches the appropriate position, specifically, the circumferential spacing b of the pipe joint 3 ( Figure 3 The distance a between the nozzles 51 is equal to that shown in the figure. The pipe joint 3 is threadedly connected to the conduit 25. The nozzles 51 are placed in the first through holes 22 one by one. The clamping rod 24 is rotated to clamp the nozzles 51 so that the nozzles 51 are fastened to the first through holes 22 to prevent the nozzles 51 from loosening. The top view of the test fixture for assembling the fuel main pipe 5 with 18 nozzles 51 is shown in FIG. Figure 7 As shown, it can be seen that the fuel main pipe 5 is evenly distributed on the test fixture, and the nozzle 51 is fastened by the clamping rod 24.

[0047] Reference Figure 8 The top view of the test fixture of the fuel manifold 5 with 12 nozzles 51 is shown. It can be seen that the fuel manifold 5 is evenly distributed on the test fixture, and the nozzles 51 are fastened by the clamping rods 24. Figure 7 The fuel manifold 5 with 12 nozzles 51 has a smaller spacing between the nozzles 51 than the fuel manifold 5 with 18 nozzles 51, and the other 6 mounting seats 2 are idle and fixed on the mounting plate 1. These results show that the universal fuel manifold test fixture of the embodiment of the present invention has good adaptability.

[0048] In summary, a universal fuel main pipe test fixture in an embodiment of the present invention comprises a mounting plate 1, a mounting seat 2 and a pipe joint 3, the mounting seat 2 comprises a conduit 25, a support rod 23, a clamping rod 24 and a mounting platform 21, and by designing a plurality of displacement grooves 4 on the mounting plate 1, the conduit 25 of the mounting seat 2 and the pipe joint 3 are detachably connected in the displacement groove 4, and the circumferential spacing of the conduit 25 is changed, so that one test fixture can meet the function of testing multiple types of fuel main pipes, and different types of fuel main pipes no longer need to be processed with special test fixtures, thereby reducing the development cost; the universal fuel main pipe test fixture in an embodiment of the present invention is universal and can be fixedly connected to the test oil pipe, thereby solving the chronic problem of reconnecting the oil channel before each test; in addition, the support rod 23 and the clamping rod 24 are detachably connected by threads, giving the clamping rod 24 the ability to move up and down, so as to clamp the nozzle 51 of the fuel main pipe 5, reduce the risk of oil leakage from the nozzle 51, and improve the test efficiency and safety.

[0049] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A universal fuel main test fixture, characterized in that: The test fixture comprises a mounting plate (1), a mounting seat (2), a pipe joint (3) and a displacement groove (4); The mounting plate (1) is provided with a plurality of displacement grooves (4); The mounting seat (2) is located in the displacement groove (4); The mounting seat (2) and the pipe joint (3) are detachably connected in the displacement groove (4); The mounting seat (2) is provided with a first through hole (22); when the mounting seat (2) is connected to the pipe joint (3), the first through hole (22) is in communication with the pipe joint (3).

2. The test fixture according to claim 1, characterized in that: The mounting seat (2) comprises a guide tube (25), a support rod (23), a pressing rod (24) and a mounting platform (21). The first through hole (22) is located at one end of the upper part of the mounting platform (21), and the support rod (23) is fixed at the other end of the upper part of the mounting platform (21); The support rod (23) and the pressing rod (24) are detachably connected; The conduit (25) is located at the lower part of the mounting platform (21) and communicates with the first through hole (22); The conduit (25) and the pipe joint (3) are detachably connected, and the conduit (25) and the pipe joint (3) are in communication with each other when connected.

3. The test fixture according to claim 2, characterized in that: Extension components are arranged on both sides of the upper part of the support rod (23), and a second through hole (26) is arranged on the extension component close to the first through hole (22). The pressing rod (24) is detachably connected to the second through hole (26).

4. The test fixture according to any one of claims 1 to 3, characterized in that: The mounting plate (1) has a circular ring structure.

5. The test fixture according to claim 4, characterized in that: The mounting plate (1) has a thickness of 5 to 10 mm, an outer diameter of 300 to 350 mm, and an inner diameter of 50 to 100 mm.

6. The test fixture according to claim 5, characterized in that: The displacement groove (4) is a strip-shaped structure.

7. The test fixture according to claim 6, characterized in that: The displacement grooves (4) are evenly arranged along the mounting plate (1).

8. The test fixture according to claim 7, characterized in that: The number of the displacement grooves (4) is 6 to 20.

9. The test fixture according to claim 8, characterized in that: The displacement groove (4) has a groove width of 4 to 10 mm and a groove length of 50 to 200 mm.

10. The test fixture according to any one of claims 1 to 3, characterized in that: The disassembly connections are all threaded disassembly connections.

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