Aero-engine fuel manifold test system and test tool thereof

Abstract

The invention aims to provide a test tool. The test tool comprises a bottom plate, a combustion chamber casing unit, a nozzle support, a nozzle and a fuel oil main pipe and oil supply pipe support. The distance between the combustion chamber casing unit and the bottom plate can be adjusted, and the distance between the upper mounting edge assembly and the lower mounting edge assembly of the combustion chamber casing unit in the axial direction of the combustion chamber casing unit can be adjusted. The nozzle is fixed in the nozzle support, the distance between the nozzle and the bottom plate can be adjusted, the position of the nozzle in the plane can be adjusted, a main pipe of the fuel main pipe test piece is fixed through the upper mounting edge assembly and the lower mounting edge assembly, and an oil supply pipe of the fuel main pipe test piece is fixed through the fuel main pipe oil supply pipe support. The nozzle is in butt joint with a mouthpiece of the fuel oil header pipe test piece. The test tool can improve the universality of the aero-engine fuel manifold test system and reduce the cost of the test system at the same time.

Description

Technical Field

[0001] The invention relates to the technical field of gas turbine engine testing, and in particular to an aviation engine fuel main pipe testing system and a testing tool thereof. Background Art

[0002] The fuel main pipe is an important component of an aircraft engine. It is fixedly connected to the outer casing of the combustion chamber and consists of pipeline components and their connectors, brackets, clamps, etc. The fuel supply to the combustion chamber of an aircraft engine requires the fuel main pipe for safe transportation. It is an important part of the engine accessory system. The structural design and characteristics of the fuel pipe are closely related to the performance of the engine and also have an important impact on the stable operation of the aircraft. The structure of the fuel main pipe system is relatively complex. Failures caused by factors such as processing, assembly, temperature, and vibration often occur, and vibration problems are one of the main causes. Therefore, studying the dynamic characteristics of the fuel main pipe has a high guiding significance for pipeline laying, vibration control, etc.

[0003] The existing fuel main vibration test bench still has the following problems:

[0004] 1) Poor versatility: Each type of fuel main pipe corresponds to a test bench tooling, and the test bench structure is different for different types of tests, so the test tooling cannot be universal.

[0005] 2) Single test condition: The existing fuel manifold vibration test bench is only suitable for a single test condition, and it is extremely difficult to simulate the actual installed flight working state of the fuel manifold. The actual working condition needs to consider the coupling effects of multiple variables such as processing, assembly, temperature, and vibration.

[0006] 3) High cost: Each type of fuel main pipe corresponds to a test bench tooling. Each change of the test bench increases the waste of labor and materials, resulting in high costs. Summary of the invention

[0007] The purpose of the present invention is to provide a test fixture, which can improve the versatility of an aircraft engine fuel main pipe test system and reduce the cost of the test system.

[0008] The test tooling for achieving the above-mentioned purpose comprises:

[0009] Base plate;

[0010] A combustion chamber casing unit is connected to the bottom plate, the distance between the combustion chamber casing unit and the bottom plate is configured to be adjustable, the combustion chamber casing unit comprises an upper mounting side assembly and a lower mounting side assembly, and the distance between the upper mounting side assembly and the lower mounting side assembly along the axial direction of the combustion chamber casing unit is configured to be adjustable;

[0011] A nozzle bracket connected to the bottom plate;

[0012] a nozzle fixed in the nozzle holder, wherein the distance between the nozzle and the base plate is configured to be adjustable, and the position of the nozzle in the plane is configured to be adjustable; and

[0013] A fuel main supply pipe bracket is fixed to the base plate;

[0014] Among them, the main pipe of the fuel manifold test piece is fixed by the upper mounting side assembly and the lower mounting side assembly, the fuel supply pipe of the fuel manifold test piece is fixed by the fuel manifold fuel supply pipe bracket, and the nozzle is docked with the nozzle of the fuel manifold test piece.

[0015] In one or more embodiments, the upper mounting edge assembly includes an upper annular wall and an upper mounting edge, the lower mounting edge assembly includes a lower annular wall and a lower mounting edge, the upper annular wall is provided with a plurality of first connecting holes distributed along the axial direction, and the lower annular wall is provided with a second connecting hole;

[0016] The second connecting hole is aligned with the first connecting hole located at a different axial position and then connected via a fastener to change the distance between the upper mounting edge and the lower mounting edge.

[0017] In one or more embodiments, in the assembled state, the lower annular wall is sleeved on the outer periphery of the upper annular wall, and the second connecting hole can be aligned with the first connecting hole located at a different axial position by axially moving the position of the lower annular wall on the upper annular wall.

[0018] In one or more embodiments, an upper mounting bracket is disposed on the upper mounting edge, and a lower mounting bracket is disposed on the lower mounting edge. The upper mounting bracket and the lower mounting bracket fix the main pipe via a clamp.

[0019] In one or more embodiments, the bottom plate includes a plurality of mounting portions with protrusions, and the plurality of mounting portions are distributed along a ring shape, so that the upper ring wall can be sleeved on the outer periphery of the plurality of mounting portions;

[0020] Among them, each of the mounting parts is provided with a plurality of third connecting holes, and the plurality of third connecting holes are arranged along the protruding direction of the mounting part. The first connecting hole in the upper ring wall sleeved on the outer periphery of the plurality of mounting parts can be aligned with the plurality of third connecting holes. By aligning the first connecting hole and the third connecting hole located at different axial positions and connecting them through fasteners, the distance between the combustion chamber casing unit and the base plate can be changed.

[0021] In one or more embodiments, the base plate is provided with a fourth connecting hole, which is a plurality of holes arranged around the periphery of the mounting portion. The nozzle holder is fixedly connected to the base plate through the fourth connecting hole. The position of the nozzle fixed in the nozzle holder in the plane can be changed by fixing the nozzle holder at the fourth connecting holes located at different positions on the periphery of the mounting portion.

[0022] In one or more embodiments, the nozzle bracket includes an upper bracket and a lower bracket, the nozzle is fixed in the upper bracket, and the upper bracket is rotatable relative to the lower bracket to change the position of the nozzle fixed in the nozzle bracket in a plane.

[0023] In one or more embodiments, the upper bracket includes an extension portion protruding toward the combustion chamber casing unit, the extension portion is provided with an elongated hole, and the nozzle is fixedly connected to the elongated hole;

[0024] The position of the nozzle in the plane and / or the distance between the nozzle and the bottom plate are changed by changing the position where the nozzle is fixed in the elongated hole.

[0025] In one or more embodiments, the distances between the fourth connection holes located at different circumferential positions on the periphery of the mounting portion and the mounting portion are different.

[0026] On the other hand, according to some embodiments of the present application, an aircraft engine fuel manifold test system is also provided, which includes a base, a vibration generator arranged on the base, and a mounting plate arranged on the vibration generator, as well as the test tooling as described above, wherein the base plate is fixedly connected to the mounting plate.

[0027] The beneficial effects of the present invention are:

[0028] When the fuel manifold test piece is fixed by the fixed fixture, the installation environment of different types of fuel manifold test pieces on the combustion chamber casing can be simulated by adjusting the distance between the upper mounting side assembly and the lower mounting side assembly, and the nozzle is configured to be adjustable in height and position in the plane so as to simulate the environment in which the nozzle is installed for different types of fuel manifold test pieces. The two work together to achieve the universality of the fixed fixture for different types of fuel manifold test pieces, and can simulate the installation environment of the fuel manifold test piece to the greatest extent, with the characteristics of strong universality and low cost.

[0029] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present application. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0031] Figure 1 Shows a three-dimensional schematic diagram of some embodiments of the test tool;

[0032] Figure 2 Shows a stereoscopic schematic diagram of some embodiments of the combustion chamber casing unit;

[0033] Figure 3 Shows an exploded schematic diagram of some embodiments of the combustion chamber casing unit;

[0034] Figure 4 for Figure 1 A partial enlarged schematic diagram of part A in FIG.

[0035] Figure 5 Shows a three-dimensional schematic diagram of some embodiments of the nozzle bracket;

[0036] Figure 6 shows an exploded schematic diagram according to some embodiments of the nozzle holder;

[0037] Figure 7 Shows a stereoscopic schematic diagram of some embodiments of the aircraft engine fuel main pipe test system;

[0038] Figure 8 A schematic diagram of the aircraft engine fuel main test system after the test fixture is removed is shown. DETAILED DESCRIPTION

[0039] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0040] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0041] In order to improve the aircraft engine fuel manifold test system, on the one hand, according to some embodiments of the present application, a test tool is provided, which can be applied to the aircraft engine fuel manifold test system to improve the versatility of the aircraft engine fuel manifold test system.

[0042] Figure 1 A three-dimensional schematic diagram of some embodiments of the test fixture is shown, in which a fuel manifold test piece 200 is fixed by the test fixture 100 so as to be able to be tested in the test system.

[0043] The test fixture 100 includes a base plate 1, a combustion chamber casing unit 2, a nozzle bracket 3, a nozzle 4, and a fuel main pipe supply pipe bracket 5. Figure 2 shows a stereoscopic schematic diagram of some embodiments of the combustion chamber casing unit, Figure 3 shows an exploded schematic diagram of some embodiments of the combustion chamber casing unit, Figure 4 for Figure 1 Please refer to the enlarged diagram of part A in Figure 2 as well as Figure 3 The combustion chamber casing unit 2 is connected to the base plate 1, and the distance between the combustion chamber casing unit 2 and the base plate 1 is configured to be adjustable. The specific method of making the distance between the combustion chamber casing unit 2 and the base plate 1 adjustable will be described in detail later, and will not be repeated here. Among them, the combustion chamber casing unit 2 is a simulation part that simulates the structure of a real combustion chamber casing, and has a structural configuration that is the same or similar to that of a real combustion chamber casing.

[0044] The combustion chamber casing unit 2 includes an upper mounting side assembly 21 and a lower mounting side assembly 22. The distance between the upper mounting side assembly 21 and the lower mounting side assembly 22 along the axial direction a of the combustion chamber casing unit 2 is configured to be adjustable. It can be understood that the combustion chamber casing unit 2 is a rotating part as a whole, and the axial direction a is a direction parallel to the rotation center axis of the rotating part. The specific manner in which the upper mounting side assembly 21 and the lower mounting side assembly 22 are adjustable will be described in detail later and will not be repeated here.

[0045] The fuel supply pipe bracket 5 of the fuel main pipe is fixed on the bottom plate, and the nozzle bracket 3 is connected to the bottom plate 1 for fixing the nozzle 4. The nozzle 4 fixed in the nozzle bracket 3 is configured to have an adjustable distance from the bottom plate 1, and the position of the nozzle 4 in the plane where it is located is also configured to be adjustable. The specific method of making the distance between the above-mentioned nozzle 4 and the bottom plate 1 adjustable, and the method of making the position of the nozzle 4 in the plane where it is located adjustable will be described in detail later, and will not be repeated here.

[0046] The fuel manifold test piece 200 includes a manifold 201, a fuel supply pipe 202, and a nozzle 203. When fixed by the test fixture 100, Figure 1 as well as Figure 4 As shown, the main pipe 201 is fixed by the upper mounting side assembly 21 and the lower mounting side assembly 22, the fuel supply pipe 202 is fixed by the fuel main pipe fuel supply pipe bracket 5, and the nozzle 4 is connected to the nozzle 203. During the test, the fuel supply pipe 202 is connected to the external fuel supply device to simulate the liquid filling state.

[0047] When the fuel manifold test piece 200 is fixed by the present fixing fixture 100, by adjusting the distance between the upper mounting side assembly 21 and the lower mounting side assembly 22, the installation environment of fuel manifold test pieces of different types on the combustion chamber casing can be simulated, and by configuring the nozzle 4 to be height-adjustable and position-adjustable in the plane, the environment in which the nozzle is installed for fuel manifold test pieces of different types can be simulated. The two work together to achieve the universality of the present fixing fixture 100 for fuel manifold test pieces of different types, and can simulate the installation environment of the fuel manifold test piece to the greatest extent, and has the characteristics of strong universality and low cost.

[0048] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0049] In the description of the embodiments of the present application, the orientation or position relationship indicated by technical terms such as "center", "upper", "lower", "axial", "radial", and "circumferential" is based on the orientation or position relationship of the connecting component in the connected state. It is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the embodiments of the present application.

[0050] See also Figure 3In some embodiments of the test fixture, the upper mounting side assembly 21 and the lower mounting side assembly 22 are adjustable by the following settings. The upper mounting side assembly 21 includes an upper annular wall 210 and an upper mounting side 211, and the lower mounting side assembly 22 includes a lower annular wall 220 and a lower mounting side 221, wherein the upper annular wall 210 is provided with a plurality of first connection holes 2100 distributed along the axial direction a, and the lower annular wall 220 is provided with a second connection hole 2200. When the upper mounting side assembly 21 and the lower mounting side assembly 22 are relatively movable, the second connection hole 2200 can move to a position aligned with the first connection hole 2100 at a different axial position, and the upper mounting side assembly 21 and the lower mounting side assembly 22 can be fixedly connected by inserting fasteners into the first connection hole 2100 and the second connection hole 2200 in the aligned state. When the distance between the upper mounting edge 211 and the lower mounting edge 221 needs to be changed, the upper mounting edge assembly 21 and the lower mounting edge assembly 22 are operated to move relative to each other to a position of a specified distance, and then the first connecting hole 2100 and the second connecting hole 2200 aligned at the specified position are fixedly connected by fasteners to obtain the desired distance between the upper mounting edge 211 and the lower mounting edge 221. In some specific embodiments, the fasteners include but are not limited to bolts, nuts, screws or pins. In some other suitable embodiments, the upper mounting edge assembly and the lower mounting edge assembly can also be adjusted by providing a slide rail on one of the upper mounting edge assembly and a slide groove on the other, and by cooperating the slide rail with the slide groove, and locking the relative position relationship between the slide rail and the slide groove by fasteners such as bolts.

[0051] In the description of the embodiments of the present application, technical terms such as "first" and "second" are only used to distinguish different objects and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features.

[0052] Further, in some embodiments of the test fixture, the outer periphery of the upper annular wall 210 matches the inner periphery of the lower annular wall 220. In the assembled state, the lower annular wall 220 is sleeved on the outer periphery of the upper annular wall 210. By moving the position of the lower annular wall 220 on the upper annular wall 210 along the axial direction a, the second connection hole 2200 can be aligned with the first connection hole 2100 located at a different axial position. In some other embodiments different from the configuration shown in the figure, the structures of the upper mounting side assembly and the lower mounting side assembly are interchangeable with each other, that is, in the connected state, the upper annular wall is sleeved on the outer side of the lower annular wall.

[0053] In some embodiments of the test fixture, an upper mounting bracket 212 is provided on the upper mounting edge 211, and a lower mounting bracket 222 is provided on the lower mounting edge 221. The upper mounting bracket 212 and the lower mounting bracket 222 are fixed to the main pipe 201 by a clamp. Figure 2 In the specific configuration shown in , the upper mounting edge 211 is a flange provided at one end of the upper annular wall 210 and protruding radially outwardly toward the upper annular wall 210, and the upper mounting bracket 212 is a convex portion provided on the upper mounting edge 211 and protruding radially outwardly. For example, a fixing hole may be provided on the upper mounting bracket 212, and the main pipe is fixed to the upper mounting edge 211 by sleeve-arranging a clamp around the outer periphery of the main pipe 201 and connecting it to the fixing hole on the upper mounting bracket 212. Similarly, the lower mounting edge 221 may have a similar configuration to the upper mounting edge 211, and the main pipe is fixed to the lower mounting edge 221 by a clamp.

[0054] In some embodiments of the test tool, in combination with Figure 2 as well as Figure 3 As shown, the bottom plate 1 includes a plurality of protruding mounting portions 11, and the plurality of mounting portions 11 are distributed along a ring shape, so that the upper ring wall 210 can be sleeved on the outer periphery of the plurality of mounting portions 11. Figure 2 As shown. Among them, each mounting portion 11 is provided with a plurality of third connection holes 110, and the plurality of third connection holes 110 are arranged along the protruding direction of the mounting portion 11, and the protruding direction is parallel to the axial direction a. The first connection hole 2100 in the upper ring wall 210 sleeved on the outer periphery of the plurality of mounting portions 11 can be aligned with the plurality of third connection holes 110, and the first connection holes 2100 located at different axial positions are aligned with the third connection holes 110, and then connected by fasteners to change the distance between the combustion chamber casing unit 2 as a whole and the base plate 1. During assembly, the distance between the upper mounting edge 211 and the lower mounting edge 221 can be adjusted first, and then the two can be fixed as a unit body through the mounting portion 11, and the specific distance between the whole body and the base plate 1 can be adjusted while fixing, and finally the assembly is completed by using fasteners such as bolts to simultaneously pass through the aligned first connection holes 2100, the second connection holes 2200 and the third connection holes 110. In some other embodiments different from those shown in the figures, the combustion chamber casing unit 2 can be fixed as a whole on the slider, for example, by providing a slide rail perpendicular to the bottom plate on the bottom plate, and the height of the combustion chamber casing unit 2 on the bottom plate 1 can be adjusted by connecting the slider with the slide rail.

[0055] exist Figure 3 In the embodiment shown in the figure, a through hole 10 is opened in the base plate 1, and the mounting portion 11 is arranged around the through hole 10. Each mounting portion can be a rectangular parallelepiped as shown in the figure, and the third connecting hole 110 is arranged along the length direction of the rectangular parallelepiped.

[0056] In some embodiments of the test fixture, a fourth connection hole 12 is provided on the bottom plate 1, and the fourth connection holes 12 are arranged around the outer periphery of the mounting portion 11. The nozzle holder 3 is fixedly connected to the bottom plate 1 through the fourth connection holes 12. The nozzle holder 3 is fixed to the fourth connection holes 12 located at different positions on the outer periphery of the mounting portion 11 to change the position of the nozzle 4 fixed in the nozzle holder 3 in the plane. Further, in a specific embodiment, the distances between the fourth connection holes 12 located at different circumferential positions on the outer periphery of the mounting portion 11 and the mounting portion 11 are different, so that the nozzle holder 3 can be fixed at different positions on the bottom plate 1. In another embodiment, the bottom plate 1 can be configured as a perforated plate, so that the nozzle holder 3 fixed on the bottom plate 1 can select its fixed position and adjust the positional relationship between the nozzle 4 fixed in the nozzle holder 3 and the combustion chamber casing unit 2. Therefore, adaptive adjustment can be made for different fuel manifold test pieces 200 to improve the versatility of the fixture.

[0057] Figure 5 shows a three-dimensional schematic diagram of some embodiments of the nozzle bracket, Figure 6 The exploded schematic diagram of some embodiments of the nozzle bracket is shown. In some embodiments of the test fixture, the nozzle bracket 3 includes an upper bracket 31 and a lower bracket 32. The nozzle 4 is fixed in the upper bracket 31. The upper bracket 31 can rotate relative to the lower bracket 32 ​​to change the position of the nozzle 4 fixed in the nozzle bracket 3 in the plane. In a specific embodiment, the upper bracket 31 and the lower bracket 32 ​​are connected by bolts. When the bolts are not tightened, the upper bracket 31 can rotate relative to the lower bracket 32 ​​with the bolt connection as the rotation axis. After rotating to a specified position, the bolts are tightened to fix the relative position relationship between the upper bracket 31 and the lower bracket 32. Through the above-mentioned settings, the nozzle 4 in the fixture has a certain degree of freedom of rotation, so that it can be adaptively adjusted for different fuel main test pieces 200 to improve the versatility of the fixture.

[0058] In some embodiments of the present test fixture, the upper bracket 31 includes an extension portion 310 protruding toward the combustion chamber casing unit, and a long hole 311 is opened in the extension portion 310, and the nozzle 4 is fixedly connected to the long hole 311. By changing the position of the nozzle 4 in the long hole 311, the position of the nozzle 4 in the plane and / or the distance between the nozzle 4 and the bottom plate 1 can be changed. Specifically, in the details shown in the figure, the nozzle 4 is fixed in the long hole 311 by a nut 6. Before the nut 6 is not locked, the nozzle 4 has the freedom of movement along the opening direction of the long hole 311, and the nozzle 4 has the freedom of movement along the hole depth direction of the long hole 311. After the position of the nozzle 4 in the long hole 311 is adjusted, the nut 6 is locked to lock the nozzle 4 in the nozzle bracket 3. Through the above configuration, the nozzle 4 can have further adjustment freedom, thereby improving the versatility of the present fixture.

[0059] In some other embodiments different from those shown in the figures, the height adjustment and the position adjustment within the plane of the nozzle 4 can also be achieved by configuring the bracket for fixing the nozzle 4 as a retractable bracket.

[0060] On the other hand, according to some embodiments of the present application, an aircraft engine fuel main pipe test system is also provided. Figure 7 A stereoscopic schematic diagram of some embodiments of the aircraft engine fuel manifold test system is shown. The aircraft engine fuel manifold test system includes a base 300, a vibration generator 400 disposed on the base 300, a mounting plate 500 disposed on the vibration generator 400, and a test fixture 100 as described in one or more embodiments as described above, and the base plate 1 of the test fixture 100 is fixedly connected to the mounting plate 500. Figure 8 The schematic diagram of the aircraft engine fuel main pipe test system after the test fixture is removed is shown in FIG. Figure 8 As shown, the mounting edge 500 is a perforated plate, and the bottom plate 1 is fixedly connected to the mounting edge 500 by fasteners such as bolts. The base 300 supports the upper test bench vibration generator 400 and the test bench mounting plate 500. The test bench vibration generator 400 can output the vibration form required for the test according to the vibration signal source, and the vibration is transmitted to the mounting plate 500, and then transmitted to the fuel manifold test piece 200 fixed on the test fixture 100 for testing. The test fixture 100 adjusts and fixes the distance between the upper and lower mounting edges according to the distance between the front and rear mounting edges of the combustion chamber casing where the fuel manifold is located. According to the number of nozzles of the fuel manifold test piece, the corresponding number of nozzle brackets 3 and the spatial position of the nozzle 4 are selected, and the vibration load is input according to the test requirements, and the fuel supply pressure and fuel supply temperature are adjusted to carry out relevant tests.

[0061] The aircraft engine fuel manifold test system having the test fixture of the configuration described in one or more of the above embodiments has the following advantages:

[0062] 1) Strong versatility: The base of the fuel manifold vibration test bench can adapt to different types of tooling structures. The fuel manifold test tooling can adjust the relative distance between the upper and lower mounting edges to simulate the installation environment of different types of combustion manifolds on the combustion chamber casing. The adjustable fixing method of the nozzle bracket 3 and the nozzle 4, as well as the adjustable position of the nozzle bracket 3, realize the spatial position adjustment and fixation of the nozzle 4, thereby achieving the adjustability and versatility of the nozzle mounting seat tooling.

[0063] 2) Diversified test conditions: This test system can control the vibration load and the filling temperature of the fuel main pipe. The posture of the test piece fixed in the tooling can be assembled according to the actual installation state, simulating the actual installation and flight working state of the fuel main pipe. The coupling effects of multiple variables such as processing, assembly, temperature, and vibration can be considered.

[0064] 3) Low cost: This test fixture is universal for various types of fuel main pipes, no special fixture is required, and the same test bench can be used for multiple working condition tests, reducing the waste of labor and materials for each test bench conversion and saving costs.

[0065] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0066] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. 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 the specific circumstances.

[0067] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them; although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should all be included in the scope of the claims and specification of the present application. In particular, as long as there is no structural conflict, the various technical features mentioned in the various embodiments can be combined in any way. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A test tool, characterized in that: include: Base plate; A combustion chamber casing unit is connected to the bottom plate, the distance between the combustion chamber casing unit and the bottom plate is configured to be adjustable, the combustion chamber casing unit comprises an upper mounting side assembly and a lower mounting side assembly, and the distance between the upper mounting side assembly and the lower mounting side assembly along the axial direction of the combustion chamber casing unit is configured to be adjustable; A nozzle bracket connected to the bottom plate; A nozzle is fixed in the nozzle holder, the distance between the nozzle and the bottom plate is configured to be adjustable, and the position of the nozzle in the plane is configured to be adjustable; as well as A fuel main pipe supply pipe bracket is fixed to the base plate; Among them, the main pipe of the fuel manifold test piece is fixed by the upper mounting side assembly and the lower mounting side assembly, the fuel supply pipe of the fuel manifold test piece is fixed by the fuel manifold fuel supply pipe bracket, and the nozzle is docked with the nozzle of the fuel manifold test piece.

2. The test tool as claimed in claim 1, characterized in that: The upper mounting edge assembly includes an upper annular wall and an upper mounting edge, the lower mounting edge assembly includes a lower annular wall and a lower mounting edge, the upper annular wall is provided with a plurality of first connecting holes distributed along the axial direction, and the lower annular wall is provided with a second connecting hole; The second connection hole is aligned with the first connection hole located at a different axial position and then connected via a fastener to change the distance between the upper mounting edge and the lower mounting edge.

3. The test tool as claimed in claim 2, characterized in that: In the assembled state, the lower annular wall is sleeved on the outer periphery of the upper annular wall, and the second connecting hole can be aligned with the first connecting hole located at a different axial position by axially moving the position of the lower annular wall on the upper annular wall.

4. The test tool as claimed in claim 2, characterized in that: An upper mounting bracket is arranged on the upper mounting edge, and a lower mounting bracket is arranged on the lower mounting edge. The upper mounting bracket and the lower mounting bracket fix the main pipe via a clamp.

5. The test tool as claimed in claim 2, characterized in that: The bottom plate includes a plurality of mounting parts with protrusions, and the plurality of mounting parts are distributed along a ring shape so that the upper ring wall can be sleeved on the outer periphery of the plurality of mounting parts; Among them, each of the mounting parts is provided with a plurality of third connecting holes, and the plurality of third connecting holes are arranged along the protruding direction of the mounting part. The first connecting hole in the upper ring wall sleeved on the outer periphery of the plurality of mounting parts can be aligned with the plurality of third connecting holes. By aligning the first connecting hole and the third connecting hole located at different axial positions and connecting them through fasteners, the distance between the combustion chamber casing unit and the base plate can be changed.

6. The test tool as claimed in claim 5, characterized in that: The base plate is provided with a fourth connecting hole, which is a plurality of holes arranged around the periphery of the mounting portion. The nozzle holder is fixedly connected to the base plate via the fourth connecting hole. The position of the nozzle fixed in the nozzle holder in the plane can be changed by fixing the nozzle holder at the fourth connecting holes located at different positions on the periphery of the mounting portion.

7. The test tool as claimed in claim 6, characterized in that: The nozzle bracket comprises an upper bracket and a lower bracket, the nozzle is fixed in the upper bracket, and the upper bracket is rotatable relative to the lower bracket to change the position of the nozzle fixed in the nozzle bracket in a plane.

8. The test tool as claimed in claim 7, characterized in that: The upper bracket includes an extension portion protruding toward the combustion chamber casing unit, the extension portion is provided with an elongated hole, and the nozzle is fixedly connected to the elongated hole; The position of the nozzle in the plane and / or the distance between the nozzle and the bottom plate are changed by changing the position where the nozzle is fixed in the elongated hole.

9. The test tool as claimed in claim 6, characterized in that: The fourth connection holes located at different circumferential positions on the outer periphery of the mounting portion have different distances from the mounting portion.

10. An aircraft engine fuel manifold test system, characterized in that: It comprises a base, a vibration generator arranged on the base and a mounting plate arranged on the vibration generator, and the test fixture according to any one of claims 1 to 9, wherein the base plate is fixedly connected to the mounting plate.

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