Force thermal load impact test method and device for turbine blade characteristic simulation piece

Abstract

The invention provides a force thermal load impact test method and device for a turbine blade feature simulation piece, and belongs to the technical field of turbine blades, the method is used for the turbine blade feature simulation piece with a through hole, a first clamping part of the feature simulation piece is fixed to a first support, and a second clamping part is connected with a load displacement assembly; the clamping assembly jointly clamps the two ends of the feature simulation piece, the flame heater faces the feature simulation piece clamped by the clamping assembly, the first temperature measurement assembly measures the surface temperature of the feature simulation piece, and the temperature sensor of the second temperature measurement assembly is located in a through hole of the feature simulation piece and measures the inner wall temperature of the feature simulation piece. The cooling assembly is used for conveying cooling gas into the through hole of the feature simulation piece through the first gas pipeline, and external heating and internal cooling can be performed on the feature simulation piece at the same time through cooperative work of the heating assembly and the cooling assembly, so that a real temperature gradient is simulated, and the accuracy and reliability of a test result are improved.

Description

Technical Field

[0001] This application relates to the field of turbine blade technology, and more specifically, to a method and apparatus for force and thermal load impact testing of turbine blade feature simulation components. Background Technology

[0002] The force and heat load impact test apparatus for turbine blade feature simulation components is a device used to test feature simulation components of turbine blades.

[0003] The current method for conducting force and thermal load impact tests on turbine blade feature simulation components uses an apparatus that includes a load assembly, a heating furnace, and a cooling chamber. The load assembly is used to fix the turbine blade feature simulation component. When testing the feature simulation component using this apparatus, a load is applied to the feature simulation component through the load assembly. The load assembly can then be cyclically placed in the heating furnace for heating and in the cooling chamber for cooling to achieve load and temperature simulation tests. After the test is completed, the feature simulation component can be analyzed.

[0004] However, the above method is not very effective at simulating temperature, resulting in poor accuracy of the experimental results.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] This application provides a method and apparatus for force and thermal load impact testing of turbine blade feature simulation components, which can solve the problem of poor temperature simulation effect in related technologies, resulting in poor accuracy of test results. The technical solution is as follows: According to one aspect of this application, a force and heat load impact testing device for a turbine blade feature simulation component is provided, for a turbine blade feature simulation component having a through hole, the device comprising: a base, a first support, a clamping assembly, a load displacement assembly, a heating assembly, a first temperature measuring assembly, a cooling assembly, a second temperature measuring assembly, and a controller; The load displacement assembly and the first bracket are mounted on the base. The clamping assembly includes a first clamping part and a second clamping part. The first clamping part and the second clamping part are respectively used to clamp the two ends of the feature simulation part. The first clamping part is fixedly connected to the first bracket, and the second clamping part is connected to the load displacement assembly and is used to apply a load to the feature simulation part under the drive of the load displacement assembly. The heating assembly includes a second bracket and a flame heater located on the second bracket, the flame heater facing the feature simulation element held by the clamping assembly; The first temperature measuring component is configured to measure the surface temperature of the feature simulation held by the clamping component, and the second temperature measuring component includes a connected temperature acquisition unit and a temperature sensor, the temperature sensor being located in a through hole of the feature simulation. The cooling assembly includes a first gas pipe and a gas supply component connected to the first gas pipe, wherein the first gas pipe is connected to one end of a through hole of the feature simulation element. The controller is connected to the load displacement component, the heating component, the first temperature measuring component, the cooling component, and the second temperature measuring component, respectively.

[0007] Optionally, the feature simulation component includes a circular boss, a first connecting rod, a first clamping rod, a second connecting rod, a second clamping rod, a first chamfer structure, and a second chamfer structure. The first connecting rod and the second connecting rod are respectively located on both sides of the circular boss. One end of the first connecting rod is connected to one circular surface of the circular boss through the first chamfer structure, and one end of the second connecting rod is connected to the other circular surface of the circular boss through the second chamfer structure. The first clamping rod is connected to the other end of the first connecting rod, and the second clamping rod is connected to the other end of the second connecting rod. The first clamping part is used to clamp the first clamping rod, and the second clamping part is used to clamp the second clamping rod; The load displacement component is configured to apply a load to the feature simulation element along the length direction of the first connecting rod.

[0008] Optionally, the first temperature measuring component includes a third bracket and an online infrared thermal imager, the online infrared thermal imager being mounted on the third bracket and facing the area including the circular boss.

[0009] Optionally, the temperature sensor includes a type K armored thermocouple.

[0010] Optionally, the air supply component includes an air compressor; The cooling assembly also includes a second gas conduit, one end of which is connected to the other end of the through-hole of the feature simulation element.

[0011] Optionally, the first clamping part includes a first clamping fixture and a first hydraulic chuck. The first hydraulic chuck is connected to the first bracket and is used to clamp the first clamping fixture. The first clamping fixture is used to clamp one end of the feature simulation part. The second clamping part includes a second clamping fixture and a second hydraulic chuck. The second hydraulic chuck is connected to the load displacement assembly and is used to clamp the second clamping fixture. The second clamping fixture is used to clamp the other end of the feature simulation part.

[0012] Optionally, the first clamping fixture includes a first water-cooling channel, and the second clamping fixture includes a second water-cooling channel; The cooling assembly further includes a water-cooled box, a first water-cooled pipe, and a second water-cooled pipe, wherein the first water-cooled pipe is connected to the first water-cooled channel, and the second water-cooled pipe is connected to the second water-cooled channel.

[0013] Optionally, the device further includes a first heat insulation plate and a second heat insulation plate, wherein the first heat insulation plate has a through hole, and the first clamping fixture passes through the through hole of the first heat insulation plate and is connected to the first heat insulation plate. The second heat insulation plate has a through hole, and the second clamping fixture passes through the through hole of the second heat insulation plate and is connected to the second heat insulation plate.

[0014] Optionally, the heating assembly further includes a flame device control box, and the flame heater includes a flame injector and an ignition burner; The flame injector and the ignition burner are respectively connected to the flame equipment control box, and the flame equipment control box is connected to the controller.

[0015] According to another aspect of this application, a method for force-thermal load impact testing of a turbine blade feature simulation component is provided, using the aforementioned force-thermal load impact testing apparatus for the turbine blade feature simulation component, the method comprising: Obtain characteristic simulation parts of turbine blades; The turbine blade feature simulation component is held at both ends by the clamping assembly of the force and heat load impact test device. Obtain a force-thermal load spectrum, which includes the waveform, frequency, and maximum load of the mechanical load cycle, as well as the first target temperature and heating rate of the surface of the feature simulation part and the second target temperature of the inner wall of the through hole of the feature simulation part; Based on the mechanical and thermal load spectrum, the load displacement component is controlled to apply cyclic mechanical load to the feature simulation part, and the heating component and the cooling component are controlled to make the surface of the feature simulation part reach the first target temperature and the inner wall of the through hole reach the second target temperature. When the simulated feature is damaged, the load displacement assembly, the heating assembly, and the cooling assembly are stopped.

[0016] The beneficial effects of the technical solutions provided in this application include at least the following: A force-thermal load impact testing device for a turbine blade feature simulation component is provided. This device is used for a turbine blade feature simulation component with through holes. A first clamping part is fixed to a first support, and a second clamping part is connected to a load displacement assembly, which together clamp both ends of the feature simulation component. The load displacement assembly applies a load to the feature simulation component through the second clamping part. A flame heater of a heating assembly faces the feature simulation component clamped by the clamping assembly, providing external heating and rapidly increasing the surface temperature of the feature simulation component. A first temperature measuring assembly measures this surface temperature. A cooling assembly supplies cooling gas into the through holes of the feature simulation component through a first gas pipe, and a second temperature measuring assembly measures the temperature inside the through holes. Through the coordinated operation of the heating and cooling assemblies, the device can simultaneously perform external heating and internal cooling of the feature simulation component, thereby simulating a realistic temperature gradient. Combined with the first and second temperature measuring assemblies, a controller can adjust the heating and cooling parameters in real time to ensure that the temperature gradient conforms to the actual operating conditions of the turbine blade. The load displacement assembly applies a load during temperature changes, realistically reproducing the force-thermal shock environment experienced by the turbine blade in the engine, thus improving the accuracy and reliability of the test results.

[0017] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0018] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure. It is obvious that the drawings described below are merely some embodiments of this disclosure, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0019] Figure 1 This is a schematic diagram of the structure of a force and heat load impact test device for simulating a turbine blade feature, provided in an embodiment of this application.

[0020] Figure 2 for Figure 1 The diagram shows a partial structural schematic of the force and heat load impact test device for the turbine blade feature simulation component.

[0021] Figure 3 for Figure 1 The diagram shows a partial structural schematic of the force and heat load impact test device for the turbine blade feature simulation component.

[0022] Figure 4 This is a flowchart illustrating a method for conducting force and thermal load impact tests on a turbine blade feature simulation component, as provided in an embodiment of this application.

[0023] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0025] Figure 1 This is a schematic diagram of the structure of a force and heat load impact testing device for simulating a turbine blade feature, provided in an embodiment of this application. Figure 2 for Figure 1 The diagram shows a partial structural schematic of the force and thermal load impact test apparatus for simulating the characteristic components of a turbine blade. Figure 3 for Figure 1 The diagram shows a partial structural schematic of the force and thermal load impact test apparatus for simulating the characteristic features of a turbine blade. Figure 2 A partial structural diagram of the first support is shown. Figure 3 part a in Figure 1 A schematic diagram of the structure of the simulated component and the clamping assembly. Figure 3 part b in Figure 3 The cross-sectional view of part a, combined with Figure 1 , Figure 2 and Figure 3 As shown, the force and heat load impact test device for the turbine blade feature simulation component 21 is used for the turbine blade feature simulation component 21, which has a through hole 211. The device includes: a base 11, a first support 12, a clamping assembly 13, a load displacement assembly 14, a heating assembly 15, a first temperature measuring assembly 16, a cooling assembly 17, a second temperature measuring assembly 18, and a controller 19.

[0026] The load displacement assembly 14 and the first bracket 12 are mounted on the base 11. The clamping assembly 13 includes a first clamping part 131 and a second clamping part 132. The first clamping part 131 and the second clamping part 132 are respectively used to clamp the two ends of the feature simulation part 21. The first clamping part 131 is fixedly connected to the first bracket 12, and the second clamping part 132 is connected to the load displacement assembly 14 and is used to apply a load to the feature simulation part 21 under the drive of the load displacement assembly 14.

[0027] The heating assembly 15 includes a second bracket 151 and a flame heater 152 located on the second bracket 151, the flame heater 152 facing the feature simulation element 21 held by the clamping assembly 13.

[0028] The first temperature measuring component 16 is configured to measure the surface temperature of the feature simulation part 21 held by the clamping component 13. The second temperature measuring component 18 includes a connected temperature acquisition unit 181 and a temperature sensor 182, which is located in the through hole 211 of the feature simulation part 21.

[0029] The cooling assembly 17 includes a first gas pipe 171 and a gas supply component 172 connected to the first gas pipe 171. The first gas pipe 171 is connected to one end of the through hole 211 of the feature simulation element 21.

[0030] The controller 19 is connected to the load displacement component 14, the heating component 15, the first temperature measuring component 16, the cooling component 17, and the second temperature measuring component 18, respectively.

[0031] In summary, the present application provides a force and heat load impact testing device for a turbine blade feature simulation component. This device is used for a turbine blade feature simulation component with through holes. A first clamping part is fixed to a first bracket, and a second clamping part is connected to a load displacement assembly, which together clamp both ends of the feature simulation component. The load displacement assembly applies a load to the feature simulation component through the second clamping part. The flame heater of the heating assembly faces the feature simulation component clamped by the clamping assembly, providing external heating and rapidly increasing the surface temperature of the feature simulation component. A first temperature measuring assembly measures this surface temperature. The cooling assembly delivers cooling gas into the through holes of the feature simulation component through a first gas pipe, and a second temperature measuring assembly measures the temperature within the through holes. Through the coordinated operation of the heating and cooling assemblies, the device can simultaneously perform external heating and internal cooling of the feature simulation component, thereby simulating a realistic temperature gradient. Combined with the first and second temperature measuring assemblies, the controller can adjust the heating and cooling parameters in real time to ensure that the temperature gradient conforms to the actual working conditions of the turbine blade. The load displacement assembly applies a load during temperature changes, realistically reproducing the force and heat impact environment experienced by the turbine blade in the engine, thus improving the accuracy and reliability of the test results.

[0032] Optionally, the feature simulation component 21 includes a circular boss 212, a first connecting rod 213, a first clamping rod 214, a second connecting rod 215, a second clamping rod 216, a first chamfer structure 217, and a second chamfer structure 218. The first connecting rod 213 and the second connecting rod 215 are located on opposite sides of the circular boss 212. One end of the first connecting rod 213 is connected to one circular surface of the circular boss 212 via the first chamfer structure 217, and one end of the second connecting rod 215 is connected to the other circular surface of the circular boss 212 via the second chamfer structure 218. The first clamping rod 214 is connected to the other end of the first connecting rod 213, and the second clamping rod 216 is connected to the other end of the second connecting rod 215. A first clamping part 131 is used to clamp the first clamping rod 214, and a second clamping part 132 is used to clamp the second clamping rod 216. The load displacement assembly 14 is configured to apply a load to the feature simulation component 21 along the length direction of the first connecting rod 213. The circular boss 212 is used to simulate the area of ​​most severe stress concentration on a real turbine blade. The first chamfer structure 217 and the second chamfer structure 218 simulate the stress concentration effect caused by geometric abrupt changes in a real turbine blade. The first connecting rod 213 and the second connecting rod 215 form a transition section. The above structure can reproduce the mechanical response of a real turbine blade under specific geometric features, thereby improving the accuracy of the experiment.

[0033] Optionally, the first temperature sensing component 16 includes a third bracket 161 and an online infrared thermal imager 162. The online infrared thermal imager 162 is mounted on the third bracket 161 and faces the area including the circular boss 212. The online infrared thermal imager 162 is a non-contact infrared thermal imager used to quickly and comprehensively measure the temperature field of the outer surface of the feature simulation part 21, especially the high-temperature circular boss 212 area. Compared with single-point temperature measurement thermocouples, the online infrared thermal imager 162 can capture the temperature distribution of the entire circular boss 212 area, promptly detect local hot spots or temperature unevenness, thereby providing more comprehensive and accurate feedback to the controller 19, ensuring heating uniformity and temperature control accuracy.

[0034] Optionally, the temperature sensor 182 includes a type K-armored thermocouple. Type K-armored thermocouples are characterized by a wide temperature range, fast response, and good mechanical strength. Their armored structure allows them to bend and penetrate deep into the inner wall of the through-hole 211 of the feature simulation element 21 through a narrow air-cooled pipe, directly contacting the point to be measured. The type K-armored thermocouple, combined with the online infrared thermal imager 162, constitutes a complete inner and outer wall temperature monitoring system, thereby enabling accurate temperature gradient measurement.

[0035] Optionally, the air supply component 172 includes an air compressor, and the cooling component 17 further includes a second gas pipe 173, one end of which is connected to the other end of the through hole 211 of the feature simulation component 21. The air compressor can provide a stable, adjustable flow and pressure cooling air source to the through hole 211 of the feature simulation component 21. The other end of the second gas pipe 173 is connected to the external environment, and the second gas pipe 173 can discharge the gas in the through hole 211 to the external environment. The first gas pipe 171 serves as an air inlet channel, and the second gas pipe 173 serves as an air outlet channel, together forming a through convection cooling channel within the through hole 211 of the feature simulation component. The cooling gas continuously flows through the through hole 211, which can efficiently remove the heat from the inner wall of the through hole 211, thereby achieving rapid and active internal cooling.

[0036] Optionally, the first clamping part 131 includes a first clamping fixture 1311 and a first hydraulic chuck 1312. The first hydraulic chuck 1312 is connected to the first bracket 12 and is used to clamp the first clamping fixture 1311, which is used to clamp one end of the feature simulation part 21. The second clamping part 132 includes a second clamping fixture 1321 and a second hydraulic chuck 1322. The second hydraulic chuck 1322 is connected to the load displacement assembly 14 and is used to clamp the second clamping fixture 1321, which is used to clamp the other end of the feature simulation part 21. The first hydraulic chuck 1312 and the second hydraulic chuck 1322 can provide a large and stable clamping force. Both ends of the feature simulation part 21 are clamped by hydraulic chucks, which can ensure that the feature simulation part 21 will not loosen or slip under load, thus ensuring the accuracy of load transfer. Optionally, the first clamping part 131 further includes a first clamping block, and the first hydraulic chuck 1312 can clamp the first clamping block, which in turn clamps the first clamping fixture 1311. The second clamping part 132 further includes a second clamping block, and the second hydraulic chuck 1322 can clamp the second clamping block, which in turn clamps the second clamping fixture 1321.

[0037] Optionally, the first clamping fixture 1311 includes a first water-cooling channel K1, and the second clamping fixture 1321 includes a second water-cooling channel K2; the cooling assembly 17 also includes a water-cooling box 174, a first water-cooling pipe, and a second water-cooling pipe, the first water-cooling pipe being connected to the first water-cooling channel K1, and the second water-cooling pipe being connected to the second water-cooling channel K2. When the flame heater 152 heats the feature simulation part 21 at high temperature, the heat will spread to the clamps at both ends of the feature simulation part 21 through heat conduction. Cold water passes through the first water-cooling channel K1 from the first water-cooling pipe to cool the first clamping fixture 1311. Cold water passes through the second water-cooling channel K2 from the second water-cooling pipe to cool the second clamping fixture 1321. The circulating cooling water through the first water-cooling channel K1 and the second water-cooling channel K2 continuously removes the heat transferred to the first clamping fixture 1311 and the second clamping fixture 1321, preventing the high temperature from being transferred to the first hydraulic chuck 1312 and the load displacement assembly 14.

[0038] Optionally, the device further includes a first heat insulation plate 31 and a second heat insulation plate 32. The first heat insulation plate 31 has a through hole 311, and a first clamping fixture 1311 passes through the through hole 311 of the first heat insulation plate 31 and is connected to the first heat insulation plate 31. The second heat insulation plate 32 has a through hole 321, and a second clamping fixture 1321 passes through the through hole 321 of the second heat insulation plate 32 and is connected to the second heat insulation plate 32. The heat insulation plates are typically made of ceramic or other high-temperature resistant, low-thermal-conductivity materials, which can effectively block the radiant heat generated by the heating component from being transferred to the hydraulic chuck and the load displacement component 14.

[0039] Optionally, the heating assembly 15 further includes a flame equipment control box 153, and the flame heater 152 includes a flame injector 1521 and an ignition burner 1522; the flame injector 1521 and the ignition burner 1522 are respectively connected to the flame equipment control box 153, and the flame equipment control box 153 is connected to the controller 19. The flame equipment control box 153 can precisely adjust the flow rate and ratio of fuel gas and oxygen, thereby controlling the intensity and temperature of the flame. The controller 19 can dynamically adjust the output of the flame equipment control box according to the real-time surface temperature fed back by the first temperature measuring component 16, to achieve rapid heating and precise temperature maintenance, simulating the transient thermal shock process of turbine blades during start-up, shutdown, or changing operating conditions, thus realizing automated closed-loop control of the heating process.

[0040] Optionally, the first support 12 includes two uprights 121 and a movable crossbeam 122. The movable crossbeam 122 is mounted on the upper ends of the two uprights 121, and the first clamping part 131 is connected to the movable crossbeam 122. The other ends of the two uprights 121 are connected to the base 11. The movable crossbeam 122 can move on the two uprights 121, thereby changing the distance between the movable crossbeam 122 and the base 11, allowing the height of the first clamping part 131 to be flexibly adjusted. This enables the device to adapt to feature simulation parts of different sizes without requiring customization of the entire support structure for simulation parts of different specifications, thus improving the versatility and flexibility of the device.

[0041] Optionally, the load displacement assembly 14 includes a load displacement monitoring sensor, which is fixedly mounted on the base 11, and the second clamping part 132 is connected to the load displacement monitoring sensor. The load displacement monitoring sensor can accurately measure and feedback the load value applied to the feature simulation part 21 and the resulting deformation in real time and synchronously. At the same time, it can monitor the mechanical response of the feature simulation part under force-thermal coupling in real time, providing direct and reliable data support for subsequent analysis of the damage evolution and fatigue life of materials under complex loads.

[0042] In summary, the present application provides a force and heat load impact testing device for a turbine blade feature simulation component. This device is used for a turbine blade feature simulation component with through holes. A first clamping part is fixed to a first bracket, and a second clamping part is connected to a load displacement assembly, which together clamp both ends of the feature simulation component. The load displacement assembly applies a load to the feature simulation component through the second clamping part. The flame heater of the heating assembly faces the feature simulation component clamped by the clamping assembly, providing external heating and rapidly increasing the surface temperature of the feature simulation component. A first temperature measuring assembly measures this surface temperature. The cooling assembly delivers cooling gas into the through holes of the feature simulation component through a first gas pipe, and a second temperature measuring assembly measures the temperature within the through holes. Through the coordinated operation of the heating and cooling assemblies, the device can simultaneously perform external heating and internal cooling of the feature simulation component, thereby simulating a realistic temperature gradient. Combined with the first and second temperature measuring assemblies, the controller can adjust the heating and cooling parameters in real time to ensure that the temperature gradient conforms to the actual working conditions of the turbine blade. The load displacement assembly applies a load during temperature changes, realistically reproducing the force and heat impact environment experienced by the turbine blade in the engine, thus improving the accuracy and reliability of the test results.

[0043] Figure 4 This application provides a flowchart of a method for conducting a force-thermal load impact test on a turbine blade feature simulation component, as illustrated in an embodiment of the present application. This method is used in the force-thermal load impact test apparatus for turbine blade feature simulation components described in any of the above embodiments, in conjunction with the aforementioned... Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the specific steps of this method include: Step 401: Obtain the characteristic simulation part of the turbine blade.

[0044] Based on the actual geometric configuration, stress gradient, and temperature gradient characteristics of the critical parts of the turbine blade, a feature simulation component 21 with a through hole 211 is designed and manufactured. This feature simulation component 21 includes a circular boss 212 for simulating stress concentration areas, a first connecting rod 213, a first clamping rod 214, a second connecting rod 215, a second clamping rod 216, and a first chamfer structure 217 and a second chamfer structure 218 to simulate the stress concentration effect caused by geometric abrupt changes.

[0045] Step 402: Clamp both ends of the feature simulation part using the clamping assembly of the force and heat load impact test device for turbine blade feature simulation part.

[0046] The feature simulation component 21 is installed between the first clamping fixture 1311 and the second clamping fixture 1321. The position of the movable crossbeam 122 on the first support 12 on the two columns 121 is adjusted to accommodate the size of the feature simulation component 21. The first clamping fixture 1311 is clamped using the first hydraulic chuck 1312, and the second clamping fixture 1321 is clamped using the second hydraulic chuck 1322, thereby firmly fixing the feature simulation component 21. The first water-cooling channel K1 of the first clamping fixture 1311 and the second water-cooling channel K2 of the second clamping fixture 1321 are connected to the water-cooled box 174 through pipes. The first gas pipe 171 on the first clamping fixture 1311 is connected to the gas supply component 172.

[0047] Step 403: Obtain the mechanical and thermal load spectrum, which includes the waveform, frequency, maximum load of the mechanical load cycle, the first target temperature of the surface of the feature simulation part, the heating rate, and the second target temperature of the inner wall of the through hole of the feature simulation part.

[0048] Based on the actual service conditions of the turbine blades, a force-thermal load spectrum is compiled. This spectrum includes the waveform, frequency, and maximum load of the mechanical load cycle, as well as the first target temperature and heating rate of the surface of the characteristic simulation part 21, and the second target temperature of the inner wall of the through hole 211.

[0049] The online infrared thermal imager 162 is mounted on the third bracket 161, and its position and angle are adjusted so that its lens is precisely focused on the circular protrusion 212 area of ​​the feature simulation part 21.

[0050] The flexible probe of the K-type armored thermocouple is precisely inserted into the inner wall of the through hole 211 of the feature simulation component 21 through the cold air channel of the second clamping fixture 1321, and the connector of the K-type armored thermocouple is inserted into the temperature acquisition device 181.

[0051] The online infrared thermal imager 162, temperature acquisition device 181, load displacement component 14, flame equipment control box 153, water cooling box 174 and gas supply component 172 are all connected to the controller 19.

[0052] Step 404: Based on the force-thermal load spectrum, control the load displacement component to apply cyclic mechanical load to the feature simulation part, and control the heating component and cooling component to make the surface of the feature simulation part reach the first target temperature and the inner wall of the through hole reach the second target temperature.

[0053] Start the controller 19, water-cooled box 174, flame equipment control box 153, air compressor and other equipment. Apply a preload of about 100N to the feature simulation part 21 through the load displacement component 14 to eliminate the assembly gap between the clamping component and the feature simulation part and ensure smooth load transfer.

[0054] The controller 19 instructs the flame equipment control box 153 to activate the flame injector 1521 and the ignition burner 1522 to rapidly heat the outer wall of the target section of the feature simulation component 21. Based on the deviation between the real-time surface temperature fed back by the online infrared thermal imager 162 and the first target temperature, the controller 19 adjusts the gas flow rate through the flame equipment control box 153 to achieve closed-loop control of the outer wall temperature. After heating to the predetermined temperature or simultaneously thereafter, the controller 19 activates the air compressor and adjusts the cooling air flow rate based on the deviation between the real-time inner wall temperature fed back by the K-type armored thermocouple 182 and the second target temperature to achieve independent closed-loop control of the inner wall temperature. By adjusting the gas flow rate and the cooling gas flow rate respectively, the outer and inner wall temperatures of the feature simulation component 21 simultaneously reach and stabilize at their respective target values ​​(e.g., 718.3K for the outer wall and 445.2K for the inner wall), thereby accurately reproducing the required real temperature gradient.

[0055] After the temperature gradient is established or synchronized with it, the controller 19 instructs the load displacement component 14 to apply a cyclic mechanical load to the feature simulation element 21 according to the preset waveform, frequency, and maximum load of the force-thermal load spectrum. For example, the load displacement component 14 can apply a force that continuously and repeatedly varies in the range of 1000 N to 100 N to the feature simulation element 21. Throughout the test, the water-cooled box 174 continuously supplies cooling water to the first clamping fixture 1311 and the second clamping fixture 1321, and the first heat insulation plate 31 and the second heat insulation plate 32 block radiant heat, jointly protecting the first hydraulic chuck 1312, the second hydraulic chuck 1322, and the load displacement component 14 from high temperatures.

[0056] Step 405: When the feature simulation component is damaged, stop the load displacement assembly, heating assembly, and cooling assembly.

[0057] When the load displacement component 14 detects fatigue fracture in the simulated feature 21 (e.g., a sudden and significant drop in load), the controller 19 automatically stops applying the mechanical load and shuts off the flame injector 1521 to stop heating. The air compressor continues to run, allowing the simulated feature 21 to cool uniformly to room temperature under forced convection cooling. Subsequently, all equipment, including the water-cooled chamber 174 and the air compressor, is shut down in sequence, and the simulated feature 21 is removed from the clamping fixture after the test for subsequent fracture morphology analysis.

[0058] Step 406: Analyze the feature simulation parts.

[0059] After step 405 is completed, the characteristic simulation part can be analyzed. This analysis includes, but is not limited to, observing its fracture morphology and crack initiation and propagation area using a scanning electron microscope, and analyzing the damage evolution mechanism under force-thermal coupled impact.

[0060] In summary, the force-thermal load impact test method for a turbine blade feature simulation component provided in this application embodiment clamps both ends of the feature simulation component using a clamping assembly of the force-thermal load impact test device. Based on the force-thermal load spectrum, a load displacement assembly is controlled to apply cyclic mechanical loads to the feature simulation component, and heating and cooling assemblies are controlled to bring the surface of the feature simulation component to a first target temperature and the inner wall of the through hole to a second target temperature, thereby simulating a realistic temperature gradient. This method realistically reproduces the force-thermal shock environment experienced by turbine blades in an engine, improving the accuracy and reliability of the test results.

[0061] In this application, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The term "multiple" refers to two or more unless otherwise expressly defined.

[0062] The above description is merely an optional embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A force and thermal load impact testing device for simulating turbine blade features, characterized in that, A feature simulation component for turbine blades, the feature simulation component having through holes, the device comprising: a base, a first support, a clamping assembly, a load displacement assembly, a heating assembly, a first temperature measuring assembly, a cooling assembly, a second temperature measuring assembly, and a controller; The load displacement assembly and the first bracket are mounted on the base. The clamping assembly includes a first clamping part and a second clamping part. The first clamping part and the second clamping part are respectively used to clamp the two ends of the feature simulation part. The first clamping part is fixedly connected to the first bracket, and the second clamping part is connected to the load displacement assembly and is used to apply a load to the feature simulation part under the drive of the load displacement assembly. The heating assembly includes a second bracket and a flame heater located on the second bracket, the flame heater facing the feature simulation element held by the clamping assembly; The first temperature measuring component is configured to measure the surface temperature of the feature simulation held by the clamping component, and the second temperature measuring component includes a connected temperature acquisition unit and a temperature sensor, the temperature sensor being located in a through hole of the feature simulation. The cooling assembly includes a first gas pipe and a gas supply component connected to the first gas pipe, wherein the first gas pipe is connected to one end of a through hole in the feature simulation element. The controller is connected to the load displacement component, the heating component, the first temperature measuring component, the cooling component, and the second temperature measuring component, respectively.

2. The force and thermal load impact test apparatus for turbine blade characteristic simulation components according to claim 1, characterized in that, The feature simulation component includes a circular boss, a first connecting rod, a first clamping rod, a second connecting rod, a second clamping rod, a first chamfer structure, and a second chamfer structure. The first connecting rod and the second connecting rod are respectively located on both sides of the circular boss. One end of the first connecting rod is connected to one circular surface of the circular boss through the first chamfer structure, and one end of the second connecting rod is connected to the other circular surface of the circular boss through the second chamfer structure. The first clamping rod is connected to the other end of the first connecting rod, and the second clamping rod is connected to the other end of the second connecting rod. The first clamping part is used to clamp the first clamping rod, and the second clamping part is used to clamp the second clamping rod; The load displacement component is configured to apply a load to the feature simulation element along the length direction of the first connecting rod.

3. The force and thermal load impact testing device for turbine blade characteristic simulation components according to claim 2, characterized in that, The first temperature measuring component includes a third bracket and an online infrared thermal imager, the online infrared thermal imager being mounted on the third bracket and facing the area including the circular boss.

4. The force and thermal load impact testing device for turbine blade characteristic simulation components according to claim 1, characterized in that, The temperature sensor includes a K-type armored thermocouple.

5. The force and thermal load impact testing apparatus for turbine blade characteristic simulation components according to claim 1, characterized in that, The air supply component includes an air compressor; The cooling assembly also includes a second gas conduit, one end of which is connected to the other end of the through-hole of the feature simulation element.

6. The force and thermal load impact testing apparatus for turbine blade characteristic simulation components according to claim 1, characterized in that, The first clamping part includes a first clamping fixture and a first hydraulic chuck. The first hydraulic chuck is connected to the first bracket and is used to clamp the first clamping fixture. The first clamping fixture is used to clamp one end of the feature simulation part. The second clamping part includes a second clamping fixture and a second hydraulic chuck. The second hydraulic chuck is connected to the load displacement assembly and is used to clamp the second clamping fixture. The second clamping fixture is used to clamp the other end of the feature simulation part.

7. The force and thermal load impact testing apparatus for turbine blade characteristic simulation components according to claim 6, characterized in that, The first clamping fixture includes a first water-cooling channel, and the second clamping fixture includes a second water-cooling channel; The cooling assembly further includes a water-cooled box, a first water-cooled pipe, and a second water-cooled pipe, wherein the first water-cooled pipe is connected to the first water-cooled channel, and the second water-cooled pipe is connected to the second water-cooled channel.

8. The force and thermal load impact testing apparatus for turbine blade characteristic simulation components according to claim 6, characterized in that, The device further includes a first heat insulation plate and a second heat insulation plate. The first heat insulation plate has a through hole, and the first clamping fixture passes through the through hole of the first heat insulation plate and is connected to the first heat insulation plate. The second heat insulation plate has a through hole, and the second clamping fixture passes through the through hole of the second heat insulation plate and is connected to the second heat insulation plate.

9. The force and thermal load impact testing apparatus for turbine blade characteristic simulation components according to any one of claims 1 to 8, characterized in that, The heating assembly also includes a flame device control box, and the flame heater includes a flame injector and an ignition burner; The flame injector and the ignition burner are respectively connected to the flame equipment control box, and the flame equipment control box is connected to the controller.

10. A method for force and thermal load impact testing of a turbine blade characteristic simulation component, characterized in that, The method is used in the force and thermal load impact testing apparatus for a turbine blade characteristic simulation component according to any one of claims 1 to 9, the method comprising: Obtain characteristic simulation parts of turbine blades; The turbine blade feature simulation component is held at both ends by the clamping assembly of the force and heat load impact test device. Obtain a force-thermal load spectrum, which includes the waveform, frequency, and maximum load of the mechanical load cycle, as well as the first target temperature and heating rate of the surface of the feature simulation part and the second target temperature of the inner wall of the through hole of the feature simulation part; Based on the mechanical and thermal load spectrum, the load displacement component is controlled to apply cyclic mechanical load to the feature simulation part, and the heating component and the cooling component are controlled to make the surface of the feature simulation part reach the first target temperature and the inner wall of the through hole reach the second target temperature. When the simulated feature is damaged, the load displacement assembly, the heating assembly, and the cooling assembly are stopped.

Images