Visual test device for oil path in fuel nozzle

Abstract

The invention provides a visual test device for an oil path in a fuel nozzle. The visual test device comprises a test section cylinder; the nozzle test assembly is arranged in the test section cylinder, one end part of the nozzle test assembly is communicated with the end part of one side of the test section cylinder, and the other end part of the nozzle test assembly extends outwards from the outer wall surface of the test section cylinder; the light source is arranged in the test section cylinder, and the camera is arranged outside the test section cylinder and is aligned with the nozzle test assembly; light of the light source penetrates through the nozzle test assembly and reaches the camera, and the camera collects the flowing condition of fuel oil in the nozzle test assembly. According to the invention, the flowing and purging conditions of the fuel oil in the fuel oil nozzle can be effectively and visually observed. The purging capacity of the fuel nozzle can be verified in advance through a component test, and the verification process and cost of the purging effect of the main oil way in the fuel nozzle are greatly reduced.

Description

Technical Field

[0001] The invention relates to the field of aviation engine gas turbines, and in particular to a visual test device for an oil circuit in a fuel nozzle. Background Art

[0002] The fuel nozzle of an aircraft engine is mainly affected by the convection heat transfer from the high-pressure compressor outlet air and the radiation heat transfer of the gas in the flame tube in the combustion chamber. As the inlet temperature of the combustion chamber increases, the oil circuit wall temperature and the fuel temperature in the fuel nozzle also continue to increase. The high fuel wet wall temperature causes the fuel to react with the oxygen dissolved in it, and deposits and cokes on the wall of the oil circuit, reducing the flow area of ​​the fuel pipeline. In severe cases, it even blocks the nozzle, affecting the fuel atomization effect, affecting the performance and safety of the gas turbine / aircraft engine.

[0003] The increasingly poor fuel atomization effect will lead to the deterioration of the combustion efficiency, emissions, and outlet temperature distribution of the combustion chamber, increased engine fuel consumption, reduced power performance, and it will be difficult to ensure the working life of the turbine blades, posing a serious threat to flight safety.

[0004] Therefore, it is necessary to take thermal protection measures for the nozzle to reduce the heating effect of external heat sources on the fuel, thereby avoiding the occurrence of coking.

[0005] According to existing research results, the following structural design measures can help reduce the coking of fuel nozzles:

[0006] 1. Cool the nozzle with air or fuel;

[0007] 2. Design the outer structure of the fuel pipeline to reduce heat exchange;

[0008] 3. Improve the fuel channel geometry and thermal protection design to reduce wet wall temperature;

[0009] 4. Treat the surface of the fuel channel to inhibit carbon deposits.

[0010] For the main oil circuit, it is also necessary to design a purge structure for the remaining fuel in the oil circuit after the main oil circuit is closed, so that the pressure of some main nozzles is greater than that of the remaining main nozzles, and the air enters the main oil circuit from the main nozzles with high pressure, blowing the fuel out from the main nozzles with low pressure.

[0011] In order to ensure the purging effect of the main oil circuit, it is necessary to test and verify the fuel purging effect in the main oil circuit after completing the purging structure design.

[0012] In order to ensure that the fuel in the oil circuit does not coke, the main oil circuit of the fuel nozzle is usually designed with a purge structure at each main nozzle to blow away the residual fuel in the oil circuit after the main oil circuit stops supplying fuel. In order to verify the purge effect of the fuel in the oil circuit, it is necessary to observe the flow of the fuel in the oil circuit.

[0013] In view of this, the inventor of the present application has designed a visual test device for the oil circuit in a fuel nozzle in order to overcome the above technical problems. Summary of the invention

[0014] The technical problem to be solved by the present invention is to overcome the defects in the prior art that the purging effect of the fuel in the fuel circuit of an aircraft engine needs to be observed, which is difficult to observe and there is no visual observation device, and to provide a visual test device for the oil circuit in a fuel nozzle.

[0015] The present invention solves the above technical problems through the following technical solutions:

[0016] A visual test device for an oil circuit in a fuel nozzle, characterized in that the visual test device comprises:

[0017] Test section cylinder;

[0018] A nozzle test assembly, wherein the nozzle test assembly is disposed in the test section cylinder, one end of the nozzle test assembly is connected to one end of the test section cylinder, and the other end extends outward from the outer wall surface of the test section cylinder;

[0019] A light source and a camera, wherein the light source is arranged in the test section cylinder, and the camera is arranged outside the test section cylinder and is aimed at the nozzle test assembly;

[0020] The light from the light source passes through the nozzle test assembly and reaches the camera, and the camera collects the fuel flow conditions in the nozzle test assembly.

[0021] According to one embodiment of the present invention, the visualization test device further comprises a mounting flange assembly, wherein the mounting flange assembly is mounted on one side end of the test section cylinder, and the nozzle test assembly is fixedly connected to the mounting flange assembly.

[0022] According to one embodiment of the present invention, the mounting flange assembly includes a first mounting flange and a second mounting flange, the first mounting flange is fixed to one side end of the test section cylinder, the second mounting flange is fixed to the first mounting flange, and the nozzle test assembly is fixed by the first mounting flange and the second mounting flange.

[0023] According to one embodiment of the present invention, the nozzle test assembly includes a fuel injection rod, a vortex finder, a nozzle housing and a nozzle oil circuit, one end of the fuel injection rod is connected to the nozzle oil circuit, the nozzle oil circuit is installed in the nozzle housing, and the nozzle housing is fixedly sleeved in the vortex finder.

[0024] According to an embodiment of the present invention, the vortex finder is fixed in the first mounting flange and the second mounting flange.

[0025] According to one embodiment of the present invention, the visualization test device further comprises a test section cover plate, which is mounted on the outer wall surface of the test section cylinder, and the other end of the fuel injection rod passes through and is connected to the test section cover plate.

[0026] According to one embodiment of the present invention, a hole is formed on the test section cover plate, and the oil spray rod extends from the hole to the outside of the test section cylinder.

[0027] According to an embodiment of the present invention, an oil inlet is provided on the oil spray rod, and oil outlets are evenly distributed in the circumferential direction of the nozzle oil path along the axial direction of the nozzle.

[0028] According to one embodiment of the present invention, an air inlet hole is circumferentially opened on the inner wall of the nozzle oil passage, and an air outlet hole is circumferentially opened on the nozzle housing.

[0029] According to an embodiment of the present invention, the visualization test device further comprises a sensing part mounting seat, and the sensing part mounting seat is mounted on the outer wall surface of the test section cylinder.

[0030] The positive and progressive effects of the present invention are:

[0031] The visual test device for the oil circuit in the fuel nozzle of the present invention has the following advantages:

[0032] 1. It can effectively visualize the fuel flow and purge conditions in the fuel nozzle.

[0033] Second, the purging ability of the fuel nozzle can be verified in advance through component testing. Otherwise, the fuel nozzle needs to be assembled into the combustion chamber after the overall processing is completed, and the purging effect of the main oil circuit can be confirmed through flow detection or cutting, CT photography, etc. after the component-level test.

[0034] 3. Greatly reduces the verification process and cost of the main oil circuit purging effect in the fuel nozzle. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The above and other features, properties and advantages of the present invention will become more apparent through the following description in conjunction with the accompanying drawings and embodiments, in which the same reference numerals always represent the same features, wherein:

[0036] Figure 1 The figure is a three-dimensional diagram of a visual test device for the oil circuit in a fuel nozzle of the present invention.

[0037] Figure 2The figure is a top view of the visual test device for the oil circuit in the fuel nozzle of the present invention.

[0038] Figure 3 for Figure 2 Sectional view taken along line AA.

[0039] Figure 4 It is an exploded view of the nozzle test assembly in the visual test device of the oil circuit in the fuel nozzle of the present invention.

[0040] Figure 5 The figure is a top view of the nozzle test assembly in the visual test device for the oil circuit in the fuel nozzle of the present invention.

[0041] Figure 6 for Figure 5 Cross-sectional view taken along line BB.

[0042] Figure 7 The figure is a front view of a nozzle test assembly in a visual test device for an oil circuit in a fuel nozzle of the present invention.

[0043] Figure 8 for Figure 7 Cross-sectional view taken along line CC.

[0044] Fig. 9 It is a schematic diagram of the visualization effect of the oil circuit inside the fuel nozzle in the visualization test device of the oil circuit inside the fuel nozzle of the present invention.

[0045] [Reference Signs]

[0046] Test section cylinder 10

[0047] Nozzle Test Kit 20

[0048] Light source 30

[0049] Camera 40

[0050] Mounting flange assembly 50

[0051] First mounting flange 51

[0052] Second mounting flange 52

[0053] Oil spray rod 21

[0054] Vortex 22

[0055] Nozzle housing 23

[0056] Nozzle oil circuit 24

[0057] First contact position A

[0058] Second contact position B

[0059] Screw 100

[0060] Test section cover 60

[0061] Hole 61

[0062] Oil inlet 25

[0063] Oil outlet 26

[0064] Air inlet hole 27

[0065] Air outlet hole 28

[0066] Sensing part mounting seat 70

[0067] Sealing nut 200

[0068] Nozzle axis direction C DETAILED DESCRIPTION

[0069] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0070] Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to preferred embodiments of the present invention, examples of which are shown in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings to represent the same or similar parts.

[0071] Furthermore, although the terms used in the present invention are selected from well-known and commonly used terms, some terms mentioned in the present invention specification may be selected by the applicant at his or her discretion, and their detailed meanings are explained in the relevant parts of the description of this document.

[0072] Furthermore, it is required that the present invention be understood not only by the actual terms used but also by the meanings connoted by each term.

[0073] like Figures 1 to 3 As shown, the present invention discloses a visual test device for the oil circuit in a fuel nozzle, which comprises: a test section cylinder 10, a nozzle test assembly 20, a light source 30 and a camera 40. The nozzle test assembly 20 is arranged in the test section cylinder 10, and one end of the nozzle test assembly 20 is connected to one end of the test section cylinder 10, and the other end extends outward from the outer wall surface of the test section cylinder 10.

[0074] The light source 30 is arranged in the test section cylinder 10, and the camera 40 is arranged outside the test section cylinder 10 and is aimed at the nozzle test assembly 20. The light of the light source 30 passes through the nozzle test assembly 20 and reaches the camera 40, and the camera 40 collects the fuel flow situation in the nozzle test assembly 20.

[0075] In order to realize the visualization of the fuel flow in the nozzle oil circuit and enhance the clarity of the image acquisition of the oil circuit in the nozzle by the high-speed camera, the present application arranges an auxiliary light source 30 upstream of the nozzle test assembly 20. A high-speed camera 40 is arranged downstream of the nozzle test assembly 20. Of course, the light source 30 here can also be arranged on the same side of the camera 40.

[0076] The visualization test device further comprises a mounting flange assembly 50 , which is mounted on one side end of the test section cylinder 10 , and the nozzle test assembly 20 is fixedly connected to the mounting flange assembly 50 .

[0077] Preferably, the mounting flange assembly 50 may include a first mounting flange 51 and a second mounting flange 52. The first mounting flange 51 is fixed to one side end of the test section cylinder 10, the second mounting flange 52 is fixed to the first mounting flange 51, and the nozzle test assembly 20 is fixed by the first mounting flange 51 and the second mounting flange 52.

[0078] like Figures 4 to 8 As shown, the nozzle test assembly 20 includes a fuel injection rod 21, a vortex finder 22, a nozzle housing 23 and a nozzle oil circuit 24. One end of the fuel injection rod 21 is connected to the nozzle oil circuit 24, and the nozzle oil circuit 24 is installed in the nozzle housing 23, and is fixed and sealed by glue in a circumferential circle at a first contact position A between the nozzle oil circuit 24 and the nozzle housing 23 and a second contact position B between the nozzle oil circuit 24 and the nozzle housing 24. The nozzle housing 23 is fixedly sleeved in the vortex finder 22 and fixed by screws 100.

[0079] In order to realize the visualization shooting of the fuel flow in the nozzle oil circuit, the nozzle housing 23 and the nozzle oil circuit 24 are designed to use transparent 3D printing resin material and perform surface photo-particle flow treatment. After the treatment, the nozzle housing 23 and the nozzle oil circuit 24 have good light transmittance.

[0080] Here, the vortex finder 22 is fixed in the first mounting flange 51 and the second mounting flange 52 .

[0081] Specifically, combined with Figure 3 As shown, a first mounting flange 51 is fixed on the test section cylinder 10, a second mounting flange 52 is fixed on the first mounting flange 51, and the vortex finder 22 of the nozzle test assembly 20 is fixed by the first mounting flange 51 and the second mounting flange 52. A test section cover plate 60 is installed above the test section cylinder 10, a hole 61 is opened on the test section cover plate 60 for the injection rod 21 to extend, and a sealing nut 200 is used to tighten it.

[0082] In addition, the visualization test device further comprises a test section cover plate 60 , which is mounted on the outer wall of the test section cylinder 10 , and the other end of the fuel injection rod 21 passes through and is connected to the test section cover plate 60 .

[0083] A hole 61 is formed on the test section cover plate 60, and the spray rod 21 extends from the hole 61 to the outside of the test section cylinder 10. An oil passage inlet 25 is formed on the spray rod 21, and oil passage outlets 26 are uniformly distributed along the circumferential direction C of the nozzle axial center on the nozzle oil passage 24.

[0084] Furthermore, an air inlet hole 27 may be circumferentially opened on the inner wall of the nozzle oil passage 24 , and an air outlet hole 28 may be circumferentially opened on the nozzle housing 23 .

[0085] In addition, the visualization test device further comprises a sensing part mounting seat 70 , and the sensing part mounting seat 70 is mounted on the outer wall surface of the test section cylinder 10 .

[0086] like Fig. 9 As shown, when the light source 30 is turned on, the light passes through the nozzle oil passage 24 and the nozzle housing 23 in the nozzle test assembly 20 and reaches the camera 40. At this time, the camera 40 can clearly capture the fuel flow in the nozzle oil passage 24.

[0087] like Figure 8 As shown in the figure, the visual test device of the oil circuit in the fuel nozzle of the present invention has the following air flow path: the upstream air from the test section cylinder 10 is divided into two streams and passes through the nozzle test assembly 20, one air flow a leaves the nozzle test assembly 20 through the vortex finder 22 of the nozzle test assembly 20. The other air flow b enters the interior of the nozzle test assembly 20 through the air inlet hole 27 on the inner wall of the nozzle oil circuit 24, and leaves the nozzle test assembly 20 from the air outlet hole 28 on the nozzle housing 23.

[0088] The fuel flow path is as follows: the fuel enters the injection rod 21 from the oil path inlet 25 on the injection rod 21 , enters the nozzle oil path 24 along the injection rod 21 , and finally leaves the nozzle test assembly 20 from the oil path outlet 26 on the nozzle oil path 24 .

[0089] In addition, in order to realize the visualization of the fuel flow in the nozzle oil circuit, the present application can also color the flowing medium in the fuel nozzle, such as adding colored dyes.

[0090] According to the above structural description, the visualization test device of the oil circuit in the fuel nozzle of the present invention first designs a fuel nozzle test assembly with visualized oil circuit, and the main oil circuit and the outer shell of the fuel nozzle test assembly are designed as 3D printed transparent resin parts.

[0091] Secondly, a test section cylinder is designed to install a visual fuel nozzle, a certain air pressure can be provided upstream of the test section cylinder, and a visual fuel nozzle test assembly is installed downstream of the test section cylinder.

[0092] Next, place the camera downstream of the fuel nozzle and aim it at the oil path inside the nozzle. At the same time, an auxiliary light source can be added. The light source can be placed inside the test section, that is, upstream of the fuel nozzle, or downstream of the fuel nozzle, that is, on the same side as the high-speed camera.

[0093] When the incoming air provided by the test section cylinder passes through the fuel nozzle purge structure, it will generate positive purge pressure and negative purge pressure, which will push the fuel in the nozzle oil circuit to flow toward the negative pressure port. The camera, transparent oil circuit and nozzle housing, and auxiliary light source ensure the visualization of the fuel flow in the oil circuit.

[0094] By using a visualized fuel nozzle and nozzle housing printed with transparent resin parts, a high-speed camera, and an auxiliary light source, the fuel flow and fuel purge conditions in the oil circuit inside the nozzle can be observed more clearly from the outside of the fuel nozzle.

[0095] In addition, by observing the fuel flow visualization test device in the fuel nozzle, the purging effect of the fuel nozzle is tested and verified. Moreover, the CFD calculation results can be calibrated according to the observation results, support can be provided for the design optimization of the purging structure, and a fuel nozzle that meets the purging requirements can be obtained. In the prior art, there is currently no other test device for visually observing the fuel flow in the fuel nozzle oil circuit.

[0096] Therefore, the visualization test device for the oil circuit in the fuel nozzle of the present invention uses 3D printed transparent resin parts to process the oil circuit and shell of the fuel nozzle, and arranges auxiliary light sources and high-speed cameras, so as to obtain a clear fuel flow process in the oil circuit of the fuel nozzle, which strongly supports the verification of the fuel purging effect in the oil circuit.

[0097] In summary, the visual test device for the oil circuit in the fuel nozzle of the present invention has the following advantages:

[0098] 1. It can effectively visualize the fuel flow and purge conditions in the fuel nozzle.

[0099] Second, the purging ability of the fuel nozzle can be verified in advance through component testing. Otherwise, the fuel nozzle needs to be assembled into the combustion chamber after the overall processing is completed, and the purging effect of the main oil circuit can be confirmed through flow detection or cutting, CT photography, etc. after the component-level test.

[0100] 3. Greatly reduces the verification process and cost of the main oil circuit purging effect in the fuel nozzle.

[0101] For those skilled in the art, the above invention disclosure is only used as an example and does not constitute a limitation of the present application. Although not explicitly stated herein, those skilled in the art may make various modifications, improvements and amendments to the present application. Such modifications, improvements and amendments are suggested in the present application, so such modifications, improvements and amendments still belong to the spirit and scope of the exemplary implementation of the present application.

[0102] At the same time, the present application uses specific words to describe the embodiments of the present application. For example, "one embodiment", "an embodiment", and / or "some embodiments" refer to a certain feature, structure or characteristic related to at least one embodiment of the present application. Therefore, it should be emphasized and noted that "one embodiment" or "an embodiment" or "an alternative embodiment" mentioned twice or more in different positions in this specification does not necessarily refer to the same embodiment. In addition, some features, structures or characteristics in one or more embodiments of the present application can be appropriately combined.

[0103] Similarly, it should be noted that in order to simplify the description of the disclosure of this application and thus facilitate the understanding of one or more embodiments of the invention, in the foregoing description of the embodiments of this application, multiple features are sometimes grouped into one embodiment, drawing, or description thereof. However, this disclosure method does not mean that the subject matter of this application requires more features than those mentioned in the claims. In fact, the features of an embodiment are less than all the features of a single embodiment disclosed above.

[0104] Although the specific embodiments of the present invention are described above, it should be understood by those skilled in the art that these are only examples, and the protection scope of the present invention is defined by the appended claims. Those skilled in the art may make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but these changes and modifications all fall within the protection scope of the present invention.

Claims

1. A visual test device for the oil circuit in a fuel nozzle, characterized in that: The visual test device comprises: Test section cylinder; A nozzle test assembly, wherein the nozzle test assembly is disposed in the test section cylinder, one end of the nozzle test assembly is connected to one end of the test section cylinder, and the other end extends outward from the outer wall surface of the test section cylinder; A light source and a camera, wherein the light source is arranged in the test section cylinder, and the camera is arranged outside the test section cylinder and is aimed at the nozzle test assembly; The light from the light source passes through the nozzle test assembly and reaches the camera, and the camera collects the fuel flow conditions in the nozzle test assembly.

2. The visual test device for the oil circuit in a fuel nozzle according to claim 1, characterized in that: The visualization test device further comprises a mounting flange assembly, wherein the mounting flange assembly is mounted on one side end of the test section cylinder, and the nozzle test assembly is fixedly connected to the mounting flange assembly.

3. The visual testing device for the oil circuit in the fuel nozzle according to claim 2, characterized in that: The mounting flange assembly includes a first mounting flange and a second mounting flange, the first mounting flange is fixed to one side end of the test section cylinder, the second mounting flange is fixed to the first mounting flange, and the nozzle test assembly is fixed by the first mounting flange and the second mounting flange.

4. The visual testing device for the oil circuit in a fuel nozzle according to claim 3, characterized in that: The nozzle test assembly includes a fuel injection rod, a vortex finder, a nozzle housing and a nozzle oil circuit. One end of the fuel injection rod is connected to the nozzle oil circuit, the nozzle oil circuit is installed in the nozzle housing, and the nozzle housing is fixedly sleeved in the vortex finder.

5. The visual testing device for the oil circuit in the fuel nozzle according to claim 4, characterized in that: The vortex finder is fixed in the first mounting flange and the second mounting flange.

6. The visual test device for the oil circuit in the fuel nozzle according to claim 4, characterized in that: The visualization test device further comprises a test section cover plate, which is mounted on the outer wall surface of the test section cylinder, and the other end of the oil spray rod passes through and is connected to the test section cover plate.

7. The visual testing device for the oil circuit in a fuel nozzle according to claim 6, characterized in that: The test section cover plate is provided with a hole, and the oil spray rod extends from the hole to the outside of the test section cylinder.

8. The visual testing device for the oil circuit in a fuel nozzle according to claim 4, characterized in that: The oil spray rod is provided with an oil passage inlet, and the nozzle oil passage is provided with oil passage outlets evenly distributed in the circumferential direction along the nozzle axis direction.

9. The visual testing device for the oil circuit in a fuel nozzle according to claim 4, characterized in that: An air inlet hole is circumferentially opened on the inner wall of the nozzle oil passage, and an air outlet hole is circumferentially opened on the nozzle housing.

10. The visual testing device for the oil circuit in a fuel nozzle according to claim 1, characterized in that: The visualization test device further comprises a sensing part mounting seat, and the sensing part mounting seat is mounted on the outer wall surface of the test section cylinder.

Images