Fuel nozzle thermal vibration fatigue test device and system

Abstract

The utility model provides a fuel nozzle thermal vibration fatigue test device and system, and relates to the technical field of fuel nozzle tests. The fuel nozzle thermal vibration fatigue test device comprises an installation tool and a detection part, the installation tool is used for installing a fuel nozzle, and the detection part is used for detecting the fuel nozzle. The mounting tool comprises a tool body and a tool cover plate connected to one side of the tool body. The tool cover plate is provided with the through mounting through hole, and the fuel nozzle is arranged in the mounting through hole in a penetrating manner, so that the head of the fuel nozzle is located on the side, away from the tool body, of the tool cover plate, the head is located outside the mounting tool, the fuel nozzle is conveniently tested, and the thermal vibration fatigue test is more convenient. The side, close to the tool body, of the tool cover plate is provided with an inclined face, and the inclined face is used for being fixedly connected with a nozzle flange of the fuel nozzle, so that the installation state of the fuel nozzle in an aero-engine is simulated, and the vibration mode and vibration stress distribution of the fuel nozzle are not changed.

Description

Technical Field

[0001] This utility model relates to the field of fuel nozzle testing technology, and more specifically, to a fuel nozzle thermal vibration fatigue testing device and system. Background Technology

[0002] The fuel nozzles of an aircraft engine are mounted on the combustion chamber casing and play a role in atomizing fuel, accelerating the formation of the fuel-air mixture, and ensuring stable combustion. When the fuel nozzles are in operation, in addition to enduring high temperature and high pressure static loads, they will also be subjected to dynamic loads such as pulsating pressure caused by combustion instability, rotor vibration transmitted from the casing, and vibration of the fuel lines. The sources of dynamic loads are numerous and the excitation magnitude is high, so the fuel nozzles face the severe challenge of thermal vibration fatigue failure.

[0003] When a fuel nozzle vibrates, its low-order vibration mode is the overall cantilever vibration of the nozzle, while the high-order vibration mode is the local vibration of the fuel injector core inside the nozzle housing. The fuel nozzle exhibits multiple vibration orders and a high risk of coupling with external excitations, making high-cycle fatigue one of its main failure modes. In the engine installation state, the fuel nozzle is located inside the combustion chamber casing. Conducting high-cycle fatigue testing of the nozzle based on the combustion chamber unit presents technical challenges such as testing difficulties and complex test environments. Utility Model Content

[0004] The following provides a brief overview of one or more aspects to offer a basic understanding of them. This overview is not an exhaustive summary of all conceived aspects, nor is it intended to identify key or decisive elements of all aspects, nor to define the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified form to prepare for the more detailed descriptions that follow.

[0005] The purpose of this invention is to provide a fuel nozzle thermal vibration fatigue testing device and system, which can more conveniently and effectively perform thermal vibration fatigue testing on fuel nozzles.

[0006] The embodiments of this utility model can be implemented in the following ways:

[0007] A fuel nozzle thermal vibration fatigue testing device, the fuel nozzle thermal vibration fatigue testing device comprising:

[0008] The mounting fixture includes a fixture body and a fixture cover plate connected to one side of the fixture body. The fixture cover plate has a through-hole for a fuel nozzle to pass through. The head of the fuel nozzle is located on the side of the fixture cover plate away from the fixture body, and the side of the fixture cover plate closest to the fixture body has an inclined surface for fixed connection with the nozzle flange of the fuel nozzle.

[0009] A detection component, which is used to detect the fuel nozzle.

[0010] Optionally, the detection component includes a high-temperature accelerometer, which is mounted on the tooling cover and used to detect the acceleration when the fuel nozzle vibrates.

[0011] Optionally, the mounting fixture further includes a sensor mounting bracket, on which the high-temperature accelerometer is mounted; the sensor mounting bracket is detachably mounted on the fixture cover plate; the fixture cover plate has a first mounting position and a second mounting position, wherein when the sensor mounting bracket is mounted in the first mounting position, the high-temperature accelerometer is used to detect the acceleration of the fuel nozzle during axial vibration; and when the sensor mounting bracket is mounted in the second mounting position, the high-temperature accelerometer is used to detect the acceleration of the fuel nozzle during circumferential vibration.

[0012] Optionally, the detection component further includes a high-order laser vibrometer and a low-order laser vibrometer, wherein the high-order laser vibrometer is used to detect the high-order vibration of the fuel nozzle, and the low-order laser vibrometer is used to detect the low-order vibration of the fuel nozzle.

[0013] Optionally, the high-order laser vibration meter includes a first laser vibration meter, a second laser vibration meter, and a third laser vibration meter; the first laser vibration meter and the second laser vibration meter are used to detect different circumferential positions of the fuel nozzle's oil collecting ring, and the third laser vibration meter is used to detect the vertical section of the fuel nozzle's rod core.

[0014] Optionally, the low-order laser vibrometer includes a fourth laser vibrometer and a fifth laser vibrometer. The fourth laser vibrometer is used to be disposed on one axial side of the head of the fuel nozzle to measure the axial amplitude of the head; the fifth laser vibrometer is used to be disposed on one circumferential side of the head of the fuel nozzle to measure the circumferential amplitude of the head.

[0015] Optionally, the detection component further includes a plurality of strain gauges, which are respectively attached to the fuel nozzle to detect the strain and stress distribution of the fuel nozzle.

[0016] Optionally, the fuel nozzle thermal vibration fatigue testing device further includes a heat insulation structure connected to the mounting fixture to prevent the heat from the mounting fixture from being transferred outward.

[0017] Optionally, the heat insulation structure includes a cooling plate having multiple cooling channels; the cooling plate is fixedly connected to the tooling body on the side away from the tooling cover plate.

[0018] Optionally, the fuel nozzle thermal vibration fatigue testing device further includes a housing and quartz lamps. The mounting fixture is disposed in the housing, and a plurality of the quartz lamps are longitudinally mounted in the housing to heat the fuel nozzles mounted on the mounting fixture.

[0019] Optionally, the fuel nozzle thermal vibration fatigue testing device further includes a thermocouple, which is used to detect the temperature after heating.

[0020] A fuel nozzle thermal vibration fatigue testing system includes a vibration table and the aforementioned fuel nozzle thermal vibration fatigue testing device, wherein the tooling body of the fuel nozzle thermal vibration fatigue testing device is mounted on the vibration table.

[0021] The beneficial effects of the fuel nozzle thermal vibration fatigue testing device and system provided in the embodiments of this utility model include:

[0022] The fuel nozzle thermal vibration fatigue testing device provided in this embodiment includes an installation fixture and a testing component. The installation fixture is used to install the fuel nozzle, and the testing component is used to test the fuel nozzle. The installation fixture includes a fixture body and a fixture cover plate connected to one side of the fixture body. The fixture cover plate has a through-hole, allowing the fuel nozzle to pass through it. This positions the fuel nozzle head away from the fixture body, facilitating testing and making the thermal vibration fatigue test more convenient. The fixture cover plate has an inclined surface near the fixture body, which is used to fix the fuel nozzle to the nozzle flange, simulating the installation state of the fuel nozzle in an aero-engine. This keeps the mode shape and vibration stress distribution of the fuel nozzle unchanged, making the fatigue test more accurate.

[0023] An embodiment of this utility model also provides a fuel nozzle thermal vibration fatigue testing system, which includes the above-mentioned fuel nozzle thermal vibration fatigue testing device. Therefore, it also has the beneficial effects of facilitating the testing of fuel nozzles, keeping the mode shape and vibration stress distribution of fuel nozzles unchanged, and making the fatigue test detection more accurate. Attached Figure Description

[0024] The above-described features and advantages of this invention can be better understood after reading the following detailed description of the embodiments of this disclosure in conjunction with the accompanying drawings. In the drawings, the components are not necessarily drawn to scale, and components having similar related characteristics or features may have the same or similar reference numerals.

[0025] Figure 1 A schematic diagram of the structure of a fuel nozzle thermal vibration fatigue testing device provided according to one aspect of the present invention is shown.

[0026] Figure 2 A cross-sectional structural schematic diagram of a fuel nozzle thermal vibration fatigue testing device provided according to one aspect of the present invention is shown.

[0027] Figure 3 A schematic diagram of the tooling cover plate in the fuel nozzle thermal vibration fatigue testing device provided according to one aspect of the present invention is shown.

[0028] Figure 4 A schematic diagram of the structure of the fuel nozzle thermal vibration fatigue testing device provided according to one aspect of the present invention is shown for radial vibration detection.

[0029] Figure 5 A schematic diagram of the structure of the fuel nozzle thermal vibration fatigue testing device provided according to one aspect of the present invention is shown for axial vibration detection.

[0030] Figure 6 A schematic diagram of the structure of the fuel nozzle thermal vibration fatigue testing device provided according to one aspect of the present invention is shown for circumferential vibration testing.

[0031] Figure 7 A schematic diagram of the structure of the fuel nozzle thermal vibration fatigue testing device provided according to one aspect of the present invention is shown from a first perspective when amplitude measurement is performed.

[0032] Figure 8 A schematic diagram of the structure of the fuel nozzle thermal vibration fatigue testing device provided according to one aspect of the present invention is shown from a second perspective when amplitude measurement is performed.

[0033] Figure 9 A schematic diagram of the strain gauge bonding structure in a fuel nozzle thermal vibration fatigue testing device provided according to one aspect of the present invention is shown.

[0034] Figure 10 A schematic diagram of the structure of the fuel nozzle thermal vibration fatigue testing device provided according to one aspect of the present invention is shown when the strain gauge is attached to the other side of the fuel nozzle.

[0035] Figure 11 A schematic diagram of the overall structure of a fuel nozzle thermal vibration fatigue testing device provided according to one aspect of the present invention is shown.

[0036] Figure label:

[0037] 100-Fuel nozzle thermal vibration fatigue testing device; 110-Mounting fixture; 111- Fixture body; 112-Mounting cavity; 113-Fitting cover plate; 114-Mounting through hole; 115-First bolt hole; 116-Second bolt hole; 117-Third bolt hole; 118-First mounting hole; 119-Second mounting hole; 120-Third mounting hole; 121-Fourth mounting hole; 122-Sensor mounting bracket; 123-Inclined surface; 130-Cooling plate; 131-Cooling channel; 140-Detection component; 141-High temperature accelerometer; 143-High-order laser measurement... Vibration meter; 144-First laser vibration meter; 145-Second laser vibration meter; 146-Third laser vibration meter; 147-Low-order laser vibration meter; 148-Fourth laser vibration meter; 149-Fifth laser vibration meter; 150-Strain gauge; 151-First strain gauge; 152-Second strain gauge; 153-Third strain gauge; 154-Fourth strain gauge; 155-Fifth strain gauge; 156-Sixth strain gauge; 157-Seventh strain gauge; 161-Box housing; 162-Quartz lamp; 163-First thermocouple; 164-Second thermocouple; 165-Third thermocouple;

[0038] 200-Fuel nozzle; 211-Head; 212-Nozzle flange; 213-First amplitude measuring hole; 214-Second amplitude measuring hole; 215-Third amplitude measuring hole. Detailed Implementation

[0039] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. It should be noted that the aspects described below with reference to the accompanying drawings and specific embodiments are merely exemplary and should not be construed as limiting the scope of protection of the present invention in any way.

[0040] In the description of this utility model, it should be noted that if terms such as "upper," "lower," "inner," "outer," or "vertical" appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use, and does not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0041] At the same time, it should be noted that the terms "first" and "second" are used only for distinguishing descriptions and should not be interpreted as indicating or implying relative importance.

[0042] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified or limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, an integral connection, or a detachable connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components, etc. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] Figure 1 This is a schematic diagram of the structure of the fuel nozzle thermal vibration fatigue testing device 100 provided in this embodiment. Figure 2 This is a cross-sectional structural schematic diagram of the fuel nozzle thermal vibration fatigue testing device 100 provided in this embodiment. Please refer to the attached diagram. Figure 1 and Figure 2 This embodiment provides a fuel nozzle thermal vibration fatigue testing device 100, and also provides a fuel nozzle thermal vibration fatigue testing system.

[0044] The fuel nozzle thermal vibration fatigue test system includes the fuel nozzle thermal vibration fatigue test device 100 described above, and also includes a vibration table. The tooling body 111 of the fuel nozzle thermal vibration fatigue test device 100 is mounted on the vibration table, thereby applying vibration to the fuel nozzle 200 during the test.

[0045] The fuel nozzle thermal vibration fatigue testing device 100 includes a mounting fixture 110 and a testing component 140. The mounting fixture 110 is used to mount a fuel nozzle 200, and the testing component 140 is used to test the fuel nozzle 200. The mounting fixture 110 includes a fixture body 111 and a fixture cover plate 113 connected to one side of the fixture body 111. The fixture cover plate 113 has a through mounting hole 114, so that the fuel nozzle 200 can be inserted into the mounting hole 114, thereby placing the head 211 of the fuel nozzle 200 on the side of the fixture cover plate 113 away from the fixture body 111. Since the head 211 is located outside the mounting fixture 110, it is convenient to test the fuel nozzle 200, making the thermal vibration fatigue test more convenient. The tooling cover plate 113 has an inclined surface 123 on the side near the tooling body 111. The inclined surface 123 is used to fix and connect with the nozzle flange 212 of the fuel nozzle 200, thereby simulating the installation state of the fuel nozzle 200 in the aero engine, so that the mode shape and vibration stress distribution of the fuel nozzle 200 remain unchanged, and the fatigue test is more accurate.

[0046] The fuel nozzle thermal vibration fatigue testing device 100 provided in this embodiment will be further described below:

[0047] Please continue to refer to the reference. Figures 1-2In this embodiment, the tooling body 111 is a conical structure with a larger bottom and a smaller top, and has a mounting cavity 112 within it. The mounting cavity 112 has an opening at the upper end of the tooling body 111. The tooling cover plate 113 is a circular plate-shaped component, which is fixedly mounted on the upper end of the tooling body 111. The mounting through hole 114 on the tooling cover plate 113 is concentrically arranged with the tooling cover plate 113, thus making the tooling cover plate 113 have an overall annular structure. The radial dimension of the mounting through hole 114 is smaller than the size of the opening of the mounting cavity 112, so that the tooling cover plate 113 covers the periphery of the opening, and the portion of the tooling cover plate 113 that covers the periphery of the opening forms a protruding portion relative to the mounting cavity 112.

[0048] The tooling cover plate 113 has an inclined surface 123, which is inclined relative to the cross-section of the tooling body 111. It should be noted that in the description of this embodiment, "cross-section" refers to a plane perpendicular to the axis. Specifically, the inclined surface 123 is provided on the protruding portion formed by the tooling cover plate 113 and is located on the side of the tooling cover plate 113 closest to the tooling body 111. Specifically, the specific inclination angle of the inclined surface 123 can be set according to the installation angle of the fuel nozzle 200 to be subjected to fatigue testing.

[0049] During installation, the fuel nozzle 200 is inserted into the mounting through hole 114, and the nozzle flange 212 of the fuel nozzle 200 is fixedly installed on the inclined surface 123. Then, the tooling cover plate 113 is fixedly installed on the tooling body 111. At this time, the position of the fuel nozzle 200 simulates its installation state on the aircraft engine. Meanwhile, the lower end of the fuel nozzle 200 is located in the mounting cavity 112, and the head 211 of the fuel nozzle 200 extends out of the mounting through hole 114 and is located outside the mounting tooling 110.

[0050] Figure 3 This is a schematic diagram of the tooling cover plate 113 in the fuel nozzle thermal vibration fatigue testing device 100 provided in this embodiment. Please refer to the following: Figures 1-3 Optionally, the tooling cover plate 113 is provided with a plurality of first bolt holes 115, and the tooling cover plate 113 is fixedly connected to the tooling body 111 by bolts passing through the first bolt holes 115. The tooling cover plate 113 is also provided with a plurality of second bolt holes 116, and the fuel nozzle 200 is fixedly connected to the tooling cover plate 113 by bolts passing through the second bolt holes 116. It is understood that in some other embodiments, other methods can also be used to achieve the connection between the tooling cover plate 113 and the tooling body 111, as well as the connection between the tooling cover plate 113 and the fuel nozzle 200.

[0051] Furthermore, the fuel nozzle thermal vibration fatigue testing device 100 also includes a heat insulation structure connected to the mounting fixture 110 to prevent heat transfer from the mounting fixture 110 to the outside. Optionally, the heat insulation structure includes a cooling plate 130 with multiple cooling channels 131. The cooling plate 130 is fixedly connected to the side of the fixture body 111 away from the fixture cover plate 113, so that the fixture body 111 is connected to the vibration table through the cooling plate 130. During the test, the cooling medium flows through the cooling channels 131 to remove heat from the mounting fixture 110, preventing heat from the mounting fixture 110 from being transferred to the vibration table through heat conduction and causing damage. It is understood that in some other embodiments, other methods can also be used as the heat insulation structure, such as using components with low thermal conductivity to connect the fixture body 111 to the vibration table.

[0052] Optionally, the tooling body 111 is provided with a third bolt hole 117, and the cooling plate 130 is fixedly connected to the tooling body 111 by bolts passing through the third bolt hole 117. It is understood that in some other embodiments, other methods can also be used to achieve the fixed connection between the tooling body 111 and the cooling plate 130.

[0053] In this embodiment, the detection component 140 includes a high-temperature accelerometer 141, which is mounted on the tooling cover plate 113 and used to detect the acceleration when the fuel injector 200 vibrates. Optionally, the tooling cover plate 113 is provided with a first mounting hole 118, and the high-temperature accelerometer 141 is directly fixed to the first mounting hole 118 by bolts (e.g., ...). Figure 4 As shown in the figure, this enables the detection of acceleration during radial vibration of the fuel nozzle 200.

[0054] Figure 5 This diagram illustrates the structure of the fuel nozzle thermal vibration fatigue testing device 100 provided in this embodiment during axial vibration testing. Figure 6 This diagram illustrates the structure of the fuel nozzle thermal vibration fatigue testing apparatus 100 provided in this embodiment during circumferential vibration testing. Please refer to the attached diagram. Figures 1-5 In this embodiment, the mounting fixture 110 further includes a sensor mounting bracket 122, on which the high-temperature accelerometer 141 is mounted. The sensor mounting bracket 122 is detachably mounted on a fixture cover plate 113, which has a first mounting position and a second mounting position. When the sensor mounting bracket 122 is mounted in the first mounting position, the high-temperature accelerometer 141 is used to detect the acceleration of the fuel injector 200 during axial vibration; when the sensor mounting bracket 122 is mounted in the second mounting position, the high-temperature accelerometer 141 is used to detect the acceleration of the fuel injector 200 during circumferential vibration.

[0055] Specifically, the tooling cover plate 113 is also provided with a second mounting hole 119, a third mounting hole 120, and a fourth mounting hole 121. The first mounting hole 118 and the second mounting hole 119 are distributed radially along the tooling cover plate 113, forming a second mounting position. When both ends of the sensor mounting bracket 122 are connected to the first mounting hole 118 and the second mounting hole 119 respectively by bolts, the detection part of the high-temperature accelerometer 141 mounted on the sensor mounting bracket 122 faces the circumference of the tooling cover plate 113, thereby being used to detect the acceleration of the fuel nozzle 200 during circumferential vibration. The third mounting hole 120 and the fourth mounting hole 121 are distributed along the axial direction of the tooling cover plate 113. The third mounting hole 120 and the fourth mounting hole 121 form the first mounting position. When the two ends of the sensor mounting bracket 122 are connected to the third mounting hole 120 and the fourth mounting hole 121 by bolts respectively, the detection part of the high temperature accelerometer 141 mounted on the sensor mounting bracket 122 faces the radial direction of the tooling cover plate 113, thereby being used to detect the acceleration when the fuel nozzle 200 vibrates axially.

[0056] Thus, the fuel nozzle thermal vibration fatigue testing device 100 provided in this embodiment can perform vibration characteristic tests on the fuel nozzle 200 in the radial, axial, and circumferential directions. By comparing the three-dimensional frequency response data of the fuel nozzle 200, its most dangerous vibration direction and vibration order can be identified. It should be noted that the detection part of the high-temperature accelerometer 141 is located inside the high-temperature accelerometer 141, which is not shown in the attached drawings.

[0057] Figure 7 This diagram shows a structural schematic of the fuel nozzle thermal vibration fatigue testing apparatus 100 provided in this embodiment during amplitude measurement from a first-view perspective. Figure 8 This diagram illustrates the structure of the fuel nozzle thermal vibration fatigue testing apparatus 100 provided in this embodiment during amplitude measurement from a second-view perspective. Please refer to the reference diagram. Figures 1-8 In this embodiment, the detection component 140 further includes a high-order laser vibration meter 143 and a low-order laser vibration meter 147. The high-order laser vibration meter 143 can detect the high-order vibration of the fuel nozzle 200, and the low-order laser vibration meter 147 can detect the low-order vibration of the fuel nozzle 200.

[0058] During high-order vibration of the fuel nozzle 200, the vibration is mainly localized in the fuel collector ring and the vertical section of the fuel line. Therefore, during testing, a first amplitude measurement hole 213 and a second amplitude measurement hole 214 need to be opened on the outer shell of the fuel collector ring on the fuel nozzle 200, and a third amplitude measurement hole 215 needs to be opened on the nozzle shell. The third amplitude measurement hole 215 is used to measure the amplitude of the fuel line. Optionally, the high-order laser vibration meter 143 includes a first laser vibration meter 144, a second laser vibration meter 145, and a third laser vibration meter 146. The first laser vibration meter 144 and the second laser vibration meter 145 are used to detect different circumferential positions of the fuel collector ring of the fuel nozzle 200. Specifically, the first laser vibration meter 144 corresponds to the position of the first amplitude measuring hole 213, and measures the amplitude inside the fuel nozzle 200 through the first amplitude measuring hole 213; the second laser vibration meter 145 corresponds to the position of the second amplitude measuring hole 214, and measures the amplitude inside the fuel nozzle 200 through the second amplitude measuring hole 214. The third laser vibration meter 146 is used to measure the vertical section of the rod core of the fuel nozzle 200. Specifically, the third laser vibration meter 146 corresponds to the position of the third amplitude measuring hole 215, and measures the amplitude inside the fuel nozzle 200 through the third amplitude measuring hole 215.

[0059] During low-order vibration of the fuel nozzle 200, there are mainly two types of cantilever vibration: one is the overall axial vibration of the nozzle, and the other is the overall circumferential vibration of the nozzle. Optionally, the low-order laser vibration meter 147 includes a fourth laser vibration meter 148 and a fifth laser vibration meter 149. The fourth laser vibration meter 148 is used to be set on one side of the head 211 of the fuel nozzle 200 to measure the axial amplitude of the head 211; the fifth laser vibration meter 149 is used to be set on one side of the head 211 of the fuel nozzle 200 to measure the circumferential amplitude of the head 211.

[0060] Figure 9 This is a schematic diagram of the strain gauge 150 bonding structure in the fuel nozzle thermal vibration fatigue testing device 100 provided in this embodiment. Figure 10 This is a schematic diagram showing the structure of the strain gauge 150 in the fuel nozzle thermal vibration fatigue testing device 100 provided in this embodiment, with the strain gauge 150 attached to the other side of the fuel nozzle 200. Please refer to the reference. Figures 1-10In this embodiment, the detection component 140 further includes a plurality of strain gauges 150, which are respectively attached to the fuel nozzle 200 to detect the strain and stress distribution of the fuel nozzle 200. Specifically, in this embodiment, there are seven strain gauges 150, namely a first strain gauge 151, a second strain gauge 152, a third strain gauge 153, a fourth strain gauge 154, a fifth strain gauge 155, a sixth strain gauge 156, and a seventh strain gauge 157. The first strain gauge 151, the second strain gauge 152, the third strain gauge 153, the fourth strain gauge 154, and the fifth strain gauge 155 are distributed on the front side of the fuel nozzle 200, and the sixth strain gauge 156 and the seventh strain gauge 157 are distributed on the rear side of the fuel nozzle 200, and the sixth strain gauge 156 and the seventh strain gauge 157 are offset in the direction from the head 211 of the fuel nozzle 200 to the nozzle flange 212.

[0061] Figure 11 This is a schematic diagram of the overall structure of the fuel nozzle thermal vibration fatigue testing device 100 provided in this embodiment. Please refer to the attached diagram. Figures 1-11 In this embodiment, the fuel nozzle thermal vibration fatigue testing device 100 also includes a quartz lamp cover, which includes a housing 161 and a plurality of quartz lamps 162. A mounting fixture 110 is disposed within the housing 161, and the plurality of quartz lamps 162 are longitudinally mounted within the housing 161 and distributed circumferentially along the housing 161, for heating the fuel nozzle 200 mounted on the mounting fixture 110. Specifically, during amplitude measurement, the laser vibrometer is positioned outside the quartz lamp cover; therefore, an opening needs to be made in the housing 161 to facilitate laser projection. Additionally, if necessary, the quartz lamps 162 near the laser beam path can be removed.

[0062] Furthermore, the fuel nozzle thermal vibration fatigue testing device 100 also includes thermocouples to detect the temperature after heating. Optionally, in this embodiment, the fuel nozzle thermal vibration fatigue testing device 100 is provided with three thermocouples, namely a first thermocouple 163, a second thermocouple 164, and a third thermocouple 165. The first thermocouple 163 is disposed at the head 211 of the fuel nozzle 200 to detect the temperature at the head 211 of the fuel nozzle 200; the second thermocouple 164 is disposed on the housing of the fuel nozzle 200 to detect the housing temperature of the fuel nozzle 200; the third thermocouple 165 is mounted on the sensor mounting bracket 122 to detect the temperature of the high-temperature accelerometer 141 to prevent the high-temperature accelerometer 141 from overheating and being damaged.

[0063] The fuel nozzle thermal vibration fatigue testing device 100 and system provided in this embodiment of the invention, after the fuel nozzle 200 is installed, has its head 211 placed outside the mounting fixture 110 for easy testing. Simultaneously, an inclined surface 123 is provided on the fixture cover plate 113 so that the fuel nozzle 200, when installed on this inclined surface 123, can simulate its installation state on an aero-engine without changing the mode shape and vibration stress distribution of the fuel nozzle 200, ensuring accurate and reliable measurements. During testing, by comparing the three-directional frequency response data of the fuel nozzle 200 through radial, axial, and circumferential vibration characteristic tests, the most dangerous vibration direction and vibration order can be identified. Through low-order and high-order thermal vibration fatigue assessment tests of the fuel nozzle 200, its vibration acceleration limit and high-cycle fatigue limit can be obtained. The test results can support the formulation of vibration limit values ​​for the fuel nozzle 200 during engine testing, enabling real-time monitoring and early warning of the fuel nozzle 200 vibration during engine testing, significantly reducing the risk of high-cycle fatigue failure of the nozzle.

[0064] The above description is only a specific embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present utility model should be included within the protection scope of the present utility model.

Claims

1. A fuel nozzle thermal vibration fatigue test apparatus characterized by comprising: The fuel nozzle thermal vibration fatigue test device comprises: an installation tool, which comprises a tool body and a tool cover plate connected to one side of the tool body; the tool cover plate has a through installation hole for the fuel nozzle to pass through, the head of the fuel nozzle is located on the side of the tool cover plate away from the tool body, and the side of the tool cover plate close to the tool body has an inclined surface for fixed connection with the nozzle flange of the fuel nozzle; and a detection component for detecting the fuel nozzle.

2. The fuel nozzle thermal vibration fatigue test device according to claim 1, wherein the detection component comprises a high-temperature accelerometer installed on the tool cover plate and used for detecting the acceleration of the fuel nozzle when vibrating.

3. The fuel nozzle thermal vibration fatigue test device according to claim 2, wherein the installation tool further comprises a sensor installation support on which the high-temperature accelerometer is installed; the sensor installation support is detachably installed on the tool cover plate; the tool cover plate has a first installation position and a second installation position; when the sensor installation support is installed at the first installation position, the high-temperature accelerometer is used for detecting the acceleration of the fuel nozzle when vibrating in the axial direction; and when the sensor installation support is installed at the second installation position, the high-temperature accelerometer is used for detecting the acceleration of the fuel nozzle when vibrating in the circumferential direction.

4. The fuel nozzle thermal vibration fatigue test device according to claim 1, wherein the detection component further comprises a high-order laser vibration tester and a low-order laser vibration tester; the high-order laser vibration tester is used for detecting high-order vibration of the fuel nozzle; and the low-order laser vibration tester is used for detecting low-order vibration of the fuel nozzle.

5. The fuel nozzle thermal vibration fatigue test device according to claim 4, wherein the high-order laser vibration tester comprises a first laser vibration tester, a second laser vibration tester and a third laser vibration tester; the first laser vibration tester and the second laser vibration tester are used for detecting different circumferential positions of the oil collecting ring of the fuel nozzle; and the third laser vibration tester is used for detecting the vertical section of the rod core of the fuel nozzle.

6. The fuel nozzle thermal vibration fatigue test device according to claim 4, wherein the low-order laser vibration tester comprises a fourth laser vibration tester and a fifth laser vibration tester; the fourth laser vibration tester is arranged on the axial side of the head of the fuel nozzle to measure the axial amplitude of the head; and the fifth laser vibration tester is arranged on the circumferential side of the head of the fuel nozzle to measure the circumferential amplitude of the head.

7. The fuel nozzle thermal vibration fatigue test device according to claim 1, wherein the detection component further comprises a plurality of strain gauges respectively adhered to the fuel nozzle to detect the strain and stress distribution of the fuel nozzle. ​ 8. The fuel nozzle thermal vibration fatigue test device according to claim 1, characterized in that, the fuel nozzle thermal vibration fatigue test device further comprises a heat insulation structure connected with the mounting tool to prevent heat transfer of the mounting tool to the outside.

9. The fuel nozzle thermal vibration fatigue test device according to claim 8, characterized in that, the heat insulation structure comprises a cooling plate with a plurality of cooling channels in the cooling plate; and the cooling plate is fixedly connected to a side of the tool body away from the tool cover plate.

10. The fuel nozzle thermal vibration fatigue test device according to claim 1, characterized in that, the fuel nozzle thermal vibration fatigue test device further comprises a box and a plurality of quartz lamps, the mounting tool is arranged in the box, and the quartz lamps are longitudinally arranged in the box to heat the fuel nozzle mounted on the mounting tool.

11. The fuel nozzle thermal vibration fatigue test device according to claim 10, characterized in that, the fuel nozzle thermal vibration fatigue test device further comprises a thermocouple for detecting the temperature after heating.

12. A fuel nozzle thermal vibration fatigue test system, characterized in that, the fuel nozzle thermal vibration fatigue test system comprises a vibration table and the fuel nozzle thermal vibration fatigue test device according to any one of claims 1-11, and the tool body of the fuel nozzle thermal vibration fatigue test device is mounted on the vibration table.

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