Blade creep test device

Abstract

The invention provides a blade creep test device, and relates to the technical field of structural design. The test device comprises a furnace cylinder, a temperature measuring ring, a temperature sensor and a first control assembly, the furnace cylinder is provided with an accommodating space, and the accommodating space is used for accommodating a to-be-detected blade; a resistance wire is arranged on the inner wall of the furnace barrel; the temperature measuring ring is arranged in the furnace barrel and sleeves the periphery of the to-be-detected blade, and the temperature measuring ring can reciprocate along the axial direction of the furnace barrel so as to align the temperature measuring ring with a to-be-detected area of the to-be-detected blade; the temperature sensor is arranged on the temperature measuring ring and can reciprocate along the radial direction of the temperature measuring ring, so that a preset distance is kept between a detection head of the temperature sensor and the to-be-detected blade; the first control assembly is electrically connected with the resistance wire and the temperature sensor, and the first control assembly is used for receiving an actual temperature value detected by the temperature sensor, comparing the actual temperature value with a preset temperature value, and controlling the resistance wire to be heated or cooled when a difference value between the actual temperature value and the preset temperature value exceeds a preset range.

Description

Technical Field

[0001] The present disclosure relates to the technical field of structural design, and in particular to a blade creep test device. Background Art

[0002] High temperature creep refers to the phenomenon that metal materials slowly undergo plastic deformation under long-term conditions of constant temperature and constant load. Turbine blades are key components in aircraft engines, responsible for converting the high-temperature gas energy generated by fuel combustion into kinetic energy to drive the aircraft forward. In a high-temperature and high-pressure working environment, the blades need to withstand huge thermal stresses. Therefore, understanding their high-temperature creep behavior is crucial to ensuring the stability and reliability of the engine. However, it is currently impossible to accurately simulate the high-temperature working environment of blades, resulting in low accuracy of the final measured high-temperature creep-related test data.

[0003] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute the prior art known to ordinary technicians in the field. Summary of the invention

[0004] The present disclosure provides a blade creep test device, which can accurately simulate the high-temperature creep environment of a blade to be tested, and help improve the accuracy of high-temperature creep-related test data measured later.

[0005] According to one aspect of the present disclosure, a blade creep test device is provided, comprising:

[0006] The furnace drum has a containing space, and the containing space is used to contain the blade to be detected; the inner wall of the furnace drum is provided with a resistance wire;

[0007] A temperature measuring ring is arranged in the furnace barrel and sleeved on the outer periphery of the blade to be detected, and the temperature measuring ring can reciprocate along the axial direction of the furnace barrel to align the temperature measuring ring with the detection area of ​​the blade to be detected;

[0008] A temperature sensor is arranged on the temperature measuring circle and can reciprocate along the radial direction of the temperature measuring circle so that the detection head of the temperature sensor maintains a preset distance with the blade to be detected;

[0009] The first control component is electrically connected to the resistance wire and the temperature sensor. The first control component is used to receive the actual temperature value detected by the temperature sensor and compare the actual temperature value with a preset temperature value. When the difference between the actual temperature value and the preset temperature value exceeds a preset range, the first control component controls the resistance wire to heat up or cool down.

[0010] In an exemplary embodiment of the present disclosure, there are multiple resistance wires, which are distributed in sequence along the axial direction of the furnace drum; there are multiple temperature measuring circles, which are distributed in sequence along the axial direction of the furnace drum at intervals, and each temperature measuring circle is provided with the temperature sensor.

[0011] In an exemplary embodiment of the present disclosure, the resistance wire is ring-shaped and surrounds the temperature measuring circle. A plurality of the temperature sensors are provided on the temperature measuring circle, and the plurality of the temperature sensors are evenly spaced along the circumference of the temperature measuring circle.

[0012] In an exemplary embodiment of the present disclosure, the furnace tube includes a first furnace body and a second furnace body that are interlocked with each other; after the first furnace body and the second furnace body are interlocked, the inner wall of the first furnace body close to the second furnace body and the inner wall of the second furnace body close to the first furnace body form the accommodating space.

[0013] In an exemplary embodiment of the present disclosure, in a direction perpendicular to the axial direction of the furnace drum, the first end of the first furnace body is connected to the first end of the second furnace body by a hinge, and the second end of the first furnace body is connected to the second end of the second furnace body by a snap-fit.

[0014] In an exemplary embodiment of the present disclosure, the furnace drum has a first open end and a second open end that are interconnected, and the accommodating space is located between the first open end and the second open end; the first open end is used to fill a first thermal insulation material, and the second open end is used to fill a second thermal insulation material.

[0015] In an exemplary embodiment of the present disclosure, the test device further includes:

[0016] The slide rail is arranged in the furnace barrel and is distributed parallel to the axial direction of the furnace barrel. The temperature measuring ring is fixed on the slide rail and can reciprocate along the extension direction of the slide rail.

[0017] In an exemplary embodiment of the present disclosure, the test device further includes:

[0018] The second control component includes a first control unit and a second control unit. The first control unit is electrically connected to the temperature measuring coil and is used to control the reciprocating movement of the temperature measuring coil along the slide rail; the second control unit is electrically connected to the temperature sensor and is used to control the radial reciprocating movement of the temperature sensor along the temperature measuring coil.

[0019] In an exemplary embodiment of the present disclosure, the test device further includes a blade fixing device to be tested, the blade fixing device to be tested can fix the blade to be tested in the accommodating space, and the blade fixing device to be tested includes:

[0020] A support frame, wherein the support frame is provided with a first fixing column and a second fixing column extending in a direction parallel to the axial direction of the furnace drum and spaced apart along the axial direction of the furnace drum;

[0021] A first clamp is fixed to a side of the first fixing column close to the second fixing column, and the first clamp is used to clamp the crown of the blade to be inspected;

[0022] A second clamp is fixed to a side of the second fixing column close to the first fixing column, and the second clamp is used to clamp the blade root of the blade to be inspected.

[0023] In an exemplary embodiment of the present disclosure, the first clamp includes a first clamping portion and a second clamping portion that are detachably connected, the surface of the first clamping portion close to the second clamping portion is a concave surface, the surface of the second clamping portion close to the first clamping portion is a concave surface, and the first clamping portion and the second clamping portion are aligned and attached to form a space for accommodating the leaf crown;

[0024] The test device also includes:

[0025] A reinforcement ring is sleeved on the outer circumference of the first clamping part and the second clamping part.

[0026] The blade creep test device disclosed in the present invention can generate heat through a resistance wire, thereby simulating the high temperature environment in which the blade works. By moving the temperature measuring circle, the temperature measuring circle can be aligned with the area to be tested of the blade to be tested, thereby accurately pointing to the area to be tested. By moving the temperature sensor so that the temperature sensor and the blade to be tested maintain a preset distance, the actual temperature in the working environment of the blade can be accurately measured by the temperature sensor, so as to control the temperature increase or decrease of the resistance wire according to the actual temperature value measured by the temperature sensor, thereby accurately simulating the high temperature environment in the working process of the blade, which helps to improve the accuracy of the test data related to high temperature creep measured later. At the same time, because the temperature sensor can reciprocate along the radial direction of the temperature measuring circle, the test device disclosed in the present invention can adapt to the measurement of blades of different sizes, which helps to improve the universal applicability of the test device.

[0027] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings herein are incorporated into the specification and constitute a part of the specification, illustrate embodiments consistent with the present disclosure, and together with the specification are used to explain the principles of the present disclosure. Obviously, the accompanying drawings described below are only some embodiments of the present disclosure, and for ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0029] Figure 1 Schematic diagram of a blade creep test device in an embodiment of the present disclosure.

[0030] Figure 2 Schematic diagram of the first furnace body in the embodiment of the present disclosure.

[0031] Figure 3 Schematic diagram of the second furnace body in the embodiment of the present disclosure.

[0032] Figure 4 Schematic diagram of a blade to be detected in an embodiment of the present disclosure.

[0033] Figure 5 It is a schematic diagram of assembling the first clamp, the second clamp and the blade to be inspected in the embodiment of the present disclosure.

[0034] Figure 6 It is a three-dimensional diagram of the first clamp in the embodiment of the present disclosure.

[0035] Figure 7 It is a three-dimensional diagram of the second clamp in the embodiment of the present disclosure.

[0036] Figure 8 Schematic diagram of the first clamping portion in an embodiment of the present disclosure.

[0037] Fig. 9 Schematic diagram of the second clamping portion in an embodiment of the present disclosure.

[0038] Fig.10 Schematic diagram of a reinforcement ring in an embodiment of the present disclosure.

[0039] In the figure: 100, blade to be tested; 101, blade crown; 102, blade root; 1, furnace tube; 11, first furnace body; 12, second furnace body; 13, accommodating space; 2, resistance wire; 3, temperature measuring coil; 4, temperature sensor; 5, first control component; 71, support frame; 711, first fixed column; 712, second fixed column; 713, crossbeam; 714, longitudinal beam; 72, first clamp; 721, first clamping part; 722, second clamping part; 73, second clamp; 74, reinforcement ring. DETAILED DESCRIPTION

[0040] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be comprehensive and complete and will fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0041] Although relative terms such as "upper" and "lower" are used in this specification to describe the relative relationship of one component of the illustration to another component, these terms are used in this specification only for convenience, such as according to the orientation of the examples described in the drawings. It is understood that if the device of the illustration is turned upside down, the component described as "upper" will become the component "lower". When a structure is "on" other structures, it may mean that the structure is formed integrally on the other structure, or that the structure is "directly" disposed on the other structure, or that the structure is "indirectly" disposed on the other structure through another structure.

[0042] The terms "a", "an", "the" and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "including" and "having" are used to indicate an open-ended inclusive meaning and mean that there may be additional elements / components / etc. in addition to the listed elements / components / etc. The terms "first" and "second" are used only as labels and are not intended to limit the quantity of their objects.

[0043] With the continuous development of aviation technology, the operating temperature of engines continues to increase to improve fuel efficiency and thrust ratio, which leads to more severe high-temperature creep challenges for turbine blades, which may cause deformation, damage or even failure of blades. Therefore, in order to gain a deeper understanding of the creep behavior of blades in high-temperature environments, and then design more high-temperature resistant and durable engine components to improve aircraft performance and safety, it is necessary to simulate similar conditions in the laboratory to study the creep behavior of materials.

[0044] At present, high temperature creep tests generally use flat specimens, solid round bars, thin-walled round tubes and blade simulations specified in standard specifications, and only a very small number of tests are based on real turbine blades. However, high temperature creep tests based on standard specimens and blade simulations are difficult to accurately simulate the temperature gradient that real turbine blades are subjected to during service and the impact of manufacturing processes on their high temperature creep life. Therefore, conducting high temperature creep tests on real turbine blades is of great significance for the study of the life of turbine blades in design, the analysis and prevention of blade failures, etc.

[0045] In addition, most existing creep testers use traditional "wire-bound thermocouples" and "simple extensometers" to measure the temperature of the heating furnace and the strain of the sample during the experiment. The former is very inconvenient to use in practice. The thermocouple needs to be tied to the fixture and rod with asbestos rope to measure the temperature of the upper, middle and lower sections. In addition to being difficult to operate, the asbestos rope is fragile after high temperature and the thermocouple may need to be re-bound for the next test; while the latter is very difficult to adjust the coaxiality of the change. The influencing factors of the external extensometer are too complicated. The coaxiality may need to be readjusted after a move, which greatly affects the accuracy of the test results.

[0046] Based on this, the embodiment of the present disclosure provides a blade creep test device, such as Figure 1 and Figure 2 As shown, the blade creep test device may include a furnace 1, a temperature measuring ring 3, a temperature sensor 4 and a first control component 5, wherein:

[0047] The furnace drum 1 has a containing space 13, and the containing space 13 is used to accommodate the blade 100 to be detected; the inner wall of the furnace drum 1 is provided with a resistance wire 2;

[0048] The temperature measuring ring 3 is arranged in the furnace barrel 1 and sleeved on the outer circumference of the blade 100 to be detected. The temperature measuring ring 3 can reciprocate along the axial direction of the furnace barrel 1 to align the temperature measuring ring 3 with the detection area of ​​the blade 100 to be detected.

[0049] The temperature sensor 4 is arranged on the temperature measuring circle 3 and can reciprocate along the radial direction of the temperature measuring circle 3 so that the detection head of the temperature sensor 4 maintains a preset distance with the blade 100 to be detected;

[0050] The first control component 5 is electrically connected to the resistance wire 2 and the temperature sensor 4. The first control component 5 is used to receive the actual temperature value detected by the temperature sensor 4, and compare the actual temperature value with the preset temperature value. When the difference between the actual temperature value and the preset temperature value exceeds a preset range, the first control component 5 controls the resistance wire 2 to heat up or cool down.

[0051] The blade creep test device disclosed in the present invention can generate heat through the resistance wire 2, thereby simulating the high temperature environment in which the blade works. By moving the temperature measuring circle 3, the temperature measuring circle 3 can be aligned with the to-be-detected area of ​​the to-be-detected blade 100, thereby accurately pointing to the to-be-detected area. By moving the temperature sensor 4 so that the temperature sensor 4 and the to-be-detected blade 100 maintain a preset distance, the actual temperature in the working environment of the blade can be accurately measured by the temperature sensor 4, so as to control the resistance wire 2 to heat up or cool down according to the actual temperature value measured by the temperature sensor 4, thereby accurately simulating the high temperature environment in the working process of the blade, which helps to improve the accuracy of the test data related to high temperature creep measured later. At the same time, because the temperature sensor 4 can reciprocate along the radial direction of the temperature measuring circle 3, the test device disclosed in the present invention can adapt to the measurement of blades of different sizes, which helps to improve the universal applicability of the test device.

[0052] The following is a detailed description of the various parts and specific details of the blade creep test device in the embodiment of the present disclosure:

[0053] Please continue to see Figure 1 As shown, the furnace drum 1 may be cylindrical, and has a receiving space 13 inside for accommodating the blade 100 to be detected. The blade 100 to be detected may be a model made by scaling down a real blade. The cross section of the furnace drum 1 may be circular, elliptical, polygonal or irregular, and is not specifically limited here. Figure 2 As shown, the inner wall of the furnace drum 1 may be provided with a resistance wire 2, and a high temperature environment may be provided to the accommodation space 13 inside the furnace drum 1 by heating the resistance wire 2. In some embodiments of the present disclosure, the number of the resistance wires 2 may be multiple, and the multiple resistance wires 2 may be distributed in sequence along the axial direction of the furnace drum 1. For example, the multiple resistance wires 2 may be distributed at equal intervals along the axial direction of the furnace drum 1, so as to balance the temperature of each area in the accommodation space 13.

[0054] In an exemplary embodiment of the present disclosure, the furnace drum 1 may have a first open end and a second open end that are interconnected, and the accommodating space 13 may be located between the first open end and the second open end. After the blade 100 to be tested is placed in the accommodating space 13, the first thermal insulation material may be filled in the first open end, and the second thermal insulation material may be filled in the second open end, so that the accommodating space 13 is insulated by the first thermal insulation material and the second thermal insulation material to prevent the heat loss in the accommodating space 13 during the test and affect the detection accuracy of the test data. In some embodiments of the present disclosure, the first thermal insulation material and the second thermal insulation material may be the same, for example, the first thermal insulation material and the second thermal insulation material may both be asbestos. It should be noted that the material of the furnace drum 1 may also include thermal insulation material to prevent the heat in the accommodating space 13 from being lost through the furnace drum 1 body.

[0055] In an exemplary embodiment of the present disclosure, Figure 2 and Figure 3 As shown, the furnace barrel 1 may include a first furnace body 11 and a second furnace body 12, and the first furnace body 11 and the second furnace body 12 may be interlocked, and after the two are interlocked, the inner wall of the first furnace body 11 close to the second furnace body 12 and the inner wall of the second furnace body 12 close to the first furnace body 11 form the above-mentioned accommodating space 13. For example, in a direction perpendicular to the axial direction of the furnace barrel 1, the first end of the first furnace body 11 is connected to the first end of the second furnace body 12 by a hinge, and the second end of the first furnace body 11 is connected to the second end of the second furnace body 12 by a buckle. It should be noted that the first furnace body 11 and the second furnace body 12 may be provided with a resistance wire 2, and the resistance wires 2 on the first furnace body 11 and the second furnace body 12 may be butted at both ends, thereby forming a complete annular resistance wire 2.

[0056] In an exemplary embodiment of the present disclosure, Figure 4 As shown, the blade 100 to be tested includes a blade crown 101 and a blade root 102. The blade creep test device disclosed in the present invention may also include a fixing device for the blade 100 to be tested. The blade 100 to be tested may be fixed in the accommodating space 13 by the fixing device of the blade 100 to be tested. Figure 1 and Figure 5 As shown, the fixing device of the blade 100 to be inspected may include a support frame 71, a first clamp 72 and a second clamp 73, wherein:

[0057] Please continue to see Figure 1 As shown, the support frame 71 may be a frame structure, which may include two longitudinal beams 714 extending in the vertical direction, and two cross beams 713 connected between the two longitudinal beams 714, and the two cross beams 713 may extend in the horizontal direction, and the horizontal direction is perpendicular to the vertical direction.

[0058] The support frame 71 is provided with a first fixing column 711 and a second fixing column 712 extending in a direction parallel to the axial direction of the furnace drum 1 (i.e., the vertical direction) and spaced apart along the axial direction of the furnace drum 1; the first fixing column 711 may extend in a direction parallel to the axial direction of the furnace drum 1, and the cross section of the first fixing column 711 may be circular, elliptical, rectangular, polygonal or irregular, which is not specifically limited here. The second fixing column 712 may also extend in a direction parallel to the axial direction of the furnace drum 1, and the shape of its cross section may be the same as that of the cross section of the first fixing column 711, or may be different from that of the cross section of the first fixing column 711, which is not specifically limited here.

[0059] The first fixed column 711 and the second fixed column 712 can be distributed opposite each other in the vertical direction and arranged at intervals; the first fixed column 711 and the second fixed column 712 can both be located between the two longitudinal beams 714, the end of the first fixed column 711 away from the second fixed column 712 is fixedly connected to a cross beam 713, and the end of the second fixed column 712 away from the first fixed column 711 is fixedly connected to another cross beam 713.

[0060] like Figure 5 and Figure 6 As shown, the first clamp 72 may be block-shaped and may be fixed to a side of the first fixing column 711 close to the second fixing column 712. The first clamp 72 is used to clamp the blade crown 101 of the blade 100 to be inspected. Figure 7 As shown, the second fixture 73 may be block-shaped and may be fixed to a side of the second fixing column 712 close to the first fixing column 711. The second fixture 73 is used to clamp the blade root 102 of the blade 100 to be inspected. In some embodiments of the present disclosure, the first fixture 72 and the second fixture 73 may be formed by fine machining to reduce the size error and make the inner surfaces of the first fixture 72 and the second fixture 73 fit the surface of the blade crown 101 or the blade root 102 as much as possible.

[0061] It should be noted that the blade crown 101 and the blade root 102 of the blade 100 to be detected are clamped in the first clamp 72 and the second clamp 73 respectively, but the middle area of ​​the blade 100 to be detected can be exposed to the outside, that is, the middle area of ​​the blade 100 to be detected is not in contact with the clamp. In addition, the size of the first clamp 72 and the second clamp 73 can be designed according to the size of the blade 100 to be detected, as long as the inner surface of the first clamp 72 fits with the blade crown 101 of the blade 100 to be detected, and the inner surface of the second clamp 73 fits with the blade tenon of the blade 100 to be detected.

[0062] In an exemplary embodiment of the present disclosure, Figure 8 and Fig. 9 As shown, the first clamp 72 may include a first clamping portion 721 and a second clamping portion 722 that are detachably connected. The surface of the first clamping portion 721 close to the second clamping portion 722 is a concave surface, and the surface of the second clamping portion 722 close to the first clamping portion 721 is also a concave surface. The first clamping portion 721 and the second clamping portion 722 are oppositely fitted to form a space for accommodating the leaf crown 101. The upper parts of the first clamping portion 721 and the second clamping portion 722 can fit the leaf crown 101 of the blade 100 to be detected into the first clamp 72 tightly, and the lower parts of the first clamping portion 721 and the second clamping portion 722 can fit the shape of the blade 100 to be detected and then clamp the upper part of the blade in the first clamp 72.

[0063] In an exemplary embodiment of the present disclosure, Fig.10 As shown, the test device of the present disclosure may further include a reinforcement ring 74, which may be annular and may be sleeved from top to bottom on the outer circumference of the first clamping portion 721 and the second clamping portion 722. The first clamping portion 721 and the second clamping portion 722 may be fastened by the reinforcement ring 74 to prevent the first clamping portion 721 from separating from the second clamping portion 722 during the test and affecting the stability of the fixed blade 100 to be tested. The material of the reinforcement ring 74 may be a heat-insulating material to prevent the heat inside the blade 100 to be tested from being conducted away during the test and affecting the test results.

[0064] In an exemplary embodiment of the present disclosure, the reinforcement ring 74 may include two detachably connected parts, the two parts may be symmetrical along the central axis of the reinforcement ring 74, and the two parts may be connected by a fixing screw and a hexagonal nut.

[0065] Please continue to see Figure 1As shown, the temperature measuring coil 3 can be arranged in the furnace barrel 1, the temperature measuring coil 3 can be annular, and can be sleeved on the outer periphery of the blade 100 to be detected. At this time, the resistance wire 2 can be annular and surround the temperature measuring coil 3. The material of the temperature measuring coil 3 can be a high temperature resistant material. The temperature measuring coil 3 can reciprocate up and down along the axial direction of the furnace barrel 1 so as to align it with the area to be detected in the blade 100 to be detected. In some embodiments of the present disclosure, the number of temperature measuring coils 3 can be multiple, and the multiple temperature measuring coils 3 can be distributed in parallel, and the multiple temperature measuring coils 3 can be distributed in sequence along the axial direction of the furnace barrel 1. The multiple temperature measuring coils 3 can reciprocate up and down along the axial direction of the furnace barrel 1 respectively, so that different temperature measuring coils 3 are respectively aligned with different areas to be detected in the blade 100 to be detected.

[0066] In an exemplary embodiment of the present disclosure, the blade creep test device of the present disclosure may further include a slide rail (not shown in the figure), which may be arranged in the furnace drum 1, and may be strip-shaped, and its extension direction may be parallel to the axial direction of the furnace drum 1. The temperature measuring coil 3 may be fixed on the slide rail and may reciprocate along the extension direction of the slide rail.

[0067] In an exemplary embodiment of the present disclosure, the blade creep test device of the present disclosure may further include a second control component (not shown in the figure), which may include a first control unit, which may be electrically connected to the temperature measuring coil 3, and may control the temperature measuring coil 3 to reciprocate along the slide rail through the first control unit. For example, the first control unit may be a driving structure similar to a hydraulic cylinder.

[0068] The temperature sensor 4 may be provided on the temperature measuring circle 3, and the ambient temperature of the area to be detected of the blade 100 to be detected may be detected by the temperature detection device. When there are multiple temperature measuring circles 3, each temperature measuring circle 3 is provided with a temperature sensor 4. In some embodiments of the present disclosure, each temperature measuring circle 3 may be provided with multiple temperature sensors 4, and the multiple temperature sensors 4 may be distributed at equal intervals along the circumference of the temperature measuring circle 3, and the temperature in the surrounding environment of the blade 100 to be detected may be detected from multiple angles by multiple temperature sensors 4. For example, each temperature measuring circle 3 may be provided with 2 to 6 temperature sensors 4, for example, each temperature measuring circle 3 may be provided with 2, 3, 4, 5 or 6 temperature sensors 4, of course, the number of temperature sensors 4 on each temperature measuring circle 3 may also be other, and is not specifically limited here.

[0069] Optionally, the number of the temperature measuring circles 3 can be three, wherein one temperature measuring circle 3 can be roughly aligned with the upper section of the blade 100 to be tested, one temperature measuring circle 3 can be roughly aligned with the middle section of the blade 100 to be tested, and one temperature measuring circle 3 can be roughly aligned with the lower section of the blade 100 to be tested. The test temperature of the upper, middle and lower sections of the blade 100 to be tested can be accurately controlled by the upper, middle and lower three layers of temperature measuring circles 3, so as to truly simulate the high temperature creep process of the real turbine blade of the aircraft engine.

[0070] In an exemplary embodiment of the present disclosure, the temperature sensor 4 can reciprocate along the radial direction of the temperature measuring circle 3 so that the detection head of the temperature sensor 4 maintains a preset distance with the blade 100 to be detected. For example, the preset distance can be 0.5cm to 1cm, for example, it can be 0.5cm, 0.7cm, 0.9cm or 1cm. Of course, it can also be other distances, as long as the temperature sensor 4 can accurately reflect the ambient temperature of the blade 100 to be detected at the preset distance. No special limitation is made on the distance between the detection head of the temperature sensor 4 and the blade 100 to be detected. At the same time, since the temperature sensor 4 can reciprocate along the radial direction of the temperature measuring circle 3, the test device of the present disclosure can adapt to the measurement of blades of different sizes, which helps to improve the universal applicability of the test device.

[0071] In an exemplary embodiment of the present disclosure, the second control assembly may further include a second control unit, which may be electrically connected to the temperature sensor 4 and may control the temperature sensor 4 to reciprocate along the radial direction of the temperature measuring circle 3. For example, the second control unit may be a driving structure similar to a hydraulic cylinder.

[0072] The first control component 5 can be electrically connected to the resistance wire 2 and the temperature sensor 4, and can receive the actual temperature value around the blade 100 to be detected detected by the temperature sensor 4 through the first control component 5, and can compare the actual temperature value with the preset temperature value. When the difference between the actual temperature value and the preset temperature value exceeds the preset range, the resistance wire 2 is controlled to increase or decrease the temperature so that the actual temperature around the blade 100 to be detected is as close to the preset temperature value as possible, so as to accurately simulate the high temperature environment during the working process of the blade, which helps to improve the accuracy of the test data related to high temperature creep measured later. For example, the first control component 5 can be a microcontroller unit (MCU).

[0073] It should be noted that when there are multiple temperature measuring circles 3 and each temperature measuring circle 3 is provided with multiple temperature sensors 4, different temperature sensors 4 located on different temperature measuring circles 3 can be controlled to move radially along the temperature measuring circle 3 respectively, thereby ensuring that the ambient temperature of each section of the blade 100 to be detected can be accurately measured, and after each temperature sensor 4 transmits the measured actual temperature value to the first control component 5, the first control component 5 can fine-tune the heating state of the resistance wire 2 according to the measurement result, so as to achieve constant temperature in the furnace 1.

[0074] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. This application is intended to cover any modification, use or adaptation of the present disclosure, which follows the general principles of the present disclosure and includes common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The specification and examples are intended to be exemplary only, and the true scope and spirit of the present disclosure are indicated by the appended claims.

Claims

1. A blade creep test device, characterized in that: include: The furnace drum has a containing space, and the containing space is used to contain the blade to be detected; the inner wall of the furnace drum is provided with a resistance wire; A temperature measuring ring is arranged in the furnace barrel and sleeved on the outer periphery of the blade to be detected, and the temperature measuring ring can reciprocate along the axial direction of the furnace barrel to align the temperature measuring ring with the detection area of ​​the blade to be detected; A temperature sensor is arranged on the temperature measuring circle and can reciprocate along the radial direction of the temperature measuring circle so that the detection head of the temperature sensor maintains a preset distance with the blade to be detected; The first control component is electrically connected to the resistance wire and the temperature sensor. The first control component is used to receive the actual temperature value detected by the temperature sensor and compare the actual temperature value with a preset temperature value. When the difference between the actual temperature value and the preset temperature value exceeds a preset range, the first control component controls the resistance wire to heat up or cool down.

2. The test device according to claim 1, characterized in that: There are multiple resistance wires, which are distributed in sequence along the axial direction of the furnace drum; there are multiple temperature measuring circles, which are distributed in sequence along the axial direction of the furnace drum at intervals, and each temperature measuring circle is provided with the temperature sensor.

3. The test device according to claim 2, characterized in that: The resistance wire is annular and surrounds the temperature measuring circle. A plurality of temperature sensors are arranged on the temperature measuring circle, and the plurality of temperature sensors are distributed at equal intervals along the circumference of the temperature measuring circle.

4. The test device according to claim 1, characterized in that: The furnace tube includes a first furnace body and a second furnace body that are buckled with each other; after the first furnace body and the second furnace body are buckled, the inner wall of the first furnace body close to the second furnace body and the inner wall of the second furnace body close to the first furnace body form the accommodating space.

5. The test device according to claim 4, characterized in that: In a direction perpendicular to the axial direction of the furnace drum, the first end of the first furnace body is connected to the first end of the second furnace body by a hinge, and the second end of the first furnace body is connected to the second end of the second furnace body by a buckle.

6. The test device according to any one of claims 1 to 5, characterized in that: The furnace drum has a first open end and a second open end which are interconnected, and the accommodating space is located between the first open end and the second open end; the first open end is used to be filled with a first heat-insulating material, and the second open end is used to be filled with a second heat-insulating material.

7. The test device according to claim 1, characterized in that: The test device also includes: The slide rail is arranged in the furnace barrel and is distributed parallel to the axial direction of the furnace barrel. The temperature measuring ring is fixed on the slide rail and can move back and forth along the extension direction of the slide rail.

8. The test device according to claim 7, characterized in that: The test device also includes: The second control component includes a first control unit and a second control unit. The first control unit is electrically connected to the temperature measuring coil and is used to control the reciprocating movement of the temperature measuring coil along the slide rail; the second control unit is electrically connected to the temperature sensor and is used to control the radial reciprocating movement of the temperature sensor along the temperature measuring coil.

9. The test device according to claim 1, wherein the blade to be tested includes a blade crown and a blade root, and is characterized in that: The test device further comprises a blade fixing device to be tested, wherein the blade fixing device to be tested can fix the blade to be tested in the accommodating space, and the blade fixing device to be tested comprises: A support frame, wherein the support frame is provided with a first fixing column and a second fixing column extending in a direction parallel to the axial direction of the furnace drum and spaced apart along the axial direction of the furnace drum; A first clamp is fixed to a side of the first fixing column close to the second fixing column, and the first clamp is used to clamp the crown of the blade to be inspected; A second clamp is fixed to a side of the second fixing column close to the first fixing column, and the second clamp is used to clamp the blade root of the blade to be inspected.

10. The test device according to claim 9, characterized in that The first clamp comprises a first clamping part and a second clamping part which are detachably connected, the surface of the first clamping part close to the second clamping part is a concave surface, the surface of the second clamping part close to the first clamping part is a concave surface, and the first clamping part and the second clamping part are oppositely attached to form a space for accommodating the leaf crown; The test device also includes: A reinforcement ring is sleeved on the outer circumference of the first clamping part and the second clamping part.

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