A thermal gradient test device and system

Abstract

The utility model provides a thermal gradient test device and system, which relates to the field of thermal gradient test technology. The thermal gradient test device includes a gas-electric hybrid slip ring and a bracket device. The gas-electric hybrid slip ring has a rotating part and a stationary part connected to each other. The clamping device is connected to the rotating part so that the clamping device can rotate relative to the stationary part, and at the same time, maintain gas conduction and electrical conduction during the rotation process. The clamping device includes a clamping end cover, a support column and a clamping base. The clamping end cover and the clamping base are respectively connected to the two ends of the support column. The clamping end cover and the clamping base clamp the two ends of the test piece respectively. The support column is provided with a thermocouple and a cold air duct. The cold air duct is used to provide cold air to the test piece, and the thermocouple is used to detect the temperature of the cold air side of the test piece. When the other side of the test piece is subjected to high-temperature gas of a preset temperature, a specific temperature gradient can be formed in the test piece, so as to realize the thermal gradient high-temperature gas environment assessment of the test piece.

Description

Technical Field

[0001] The utility model relates to the technical field of thermal gradient testing, in particular to a thermal gradient testing device and system. Background Art

[0002] Before high-temperature structural materials are applied to the hot end components of the engine, it is necessary to simulate the engine gas environment to evaluate the materials and confirm their service behavior and service life in the high-temperature gas environment. By burning standard kerosene or other fuels, a high-temperature flame jet with a certain speed close to the gas composition is formed to heat the candidate materials, and a targeted gas thermal shock cycle test is carried out. At present, when conducting thermal shock tests, in order to save test costs and shorten the test cycle, special fixtures are generally designed at the gas outlet position to install multiple test pieces, ensuring that each test can evaluate more than one / group of test pieces at the same time and obtain more test data. At the same time, the fixture can rotate to ensure the consistency of the gas environment of each test piece on the fixture.

[0003] In fact, the service temperature field of the hot end components changes continuously, and even experiences a temperature gradient of 600°C along the material thickness direction. At present, in the high-temperature gas test device that tests multiple test pieces at the same time, no matter whether the test pieces are clamped parallel or perpendicular to the gas flow, the rotating test pieces will always be in a heating environment and cannot form a specific temperature gradient. Utility Model Content

[0004] The utility model aims to provide a thermal gradient test device, which can improve the problem in the prior art that it is difficult to form a specific temperature gradient when a high-temperature gas test is performed on a plurality of test pieces at the same time.

[0005] The utility model also aims to provide a thermal gradient test system, which can improve the problem in the prior art that it is difficult to form a specific temperature gradient when performing high-temperature gas tests on multiple test pieces at the same time.

[0006] The embodiments of the present invention can be implemented in the following ways:

[0007] A thermal gradient test device, comprising:

[0008] A gas-electric hybrid slip ring, wherein the gas-electric hybrid slip ring has a rotating part and a stationary part connected to each other, and an electrical conduction structure and a gas conduction structure are provided between the rotating part and the stationary part; and

[0009] a clamping device connected to the rotating component so that the clamping device can rotate relative to the stationary component;

[0010] Wherein, the clamping device includes a clamping end cover, a support column and a clamping base; the clamping end cover and the clamping base are respectively connected to the two ends of the support column, the clamping end cover has a plurality of first mounting parts arranged around the support column, and the clamping base has a plurality of second mounting parts arranged around the support column, and the first mounting parts and the second mounting parts are used to clamp the two ends of the test piece; a thermocouple and a cold air duct are arranged on the support column, and the cold air duct is connected to the air conduction structure to provide cold air to the side of the test piece close to the support column; the thermocouple is electrically connected to the electrical conduction structure and is used to detect the cooling temperature.

[0011] Optionally, the first mounting portion, the second mounting portion, and the cold air duct are at the same circumferential position on the support column, so that a plurality of the cold air ducts correspond one-to-one to a plurality of the test pieces.

[0012] Optionally, a first cold air duct ring and a second cold air duct ring are provided on the support column, and the first cold air duct ring and the second cold air duct ring respectively include a plurality of cold air ducts distributed along the circumference of the support column; along the axial direction of the support column, the first cold air duct ring, the thermocouple and the second cold air duct ring are distributed in sequence.

[0013] Optionally, a through hole is provided on the clamping end cover, and the end of the support column passes through the through hole and is fixedly connected to the rotating component;

[0014] The clamping end cover is also provided with a square groove, and the support column is provided with a square convex ridge, and the square convex ridge is engaged with the square groove to fix the circumferential position of the clamping end cover and the support column.

[0015] Optionally, a line connecting the first mounting portion and the second mounting portion is perpendicular to an air outlet direction of the cold air duct.

[0016] Optionally, a distance between a line connecting the first mounting portion and the second mounting portion and an air outlet of the cold air duct is less than or equal to 3 mm.

[0017] Optionally, a first through hole and a second through hole are provided on the support column, and the cold air duct is installed at the first through hole; the clamping device also includes a thermocouple sleeve installed at the second through hole, and the sensing part of the thermocouple is located in the thermocouple sleeve.

[0018] Optionally, the support column has a cavity inside, the cavity is connected to the air conduction structure, and the first through hole is connected to the cavity, so that cold air passes through the cavity into the first through hole and then sprays out from the cold air duct; the cavity is connected to the electrical conduction structure, and the second through hole is connected to the cavity, so that the lead wire of the thermocouple passes from the cavity into the second through hole;

[0019] A convex portion is formed on the outer periphery of the middle portion of the support column, and the first through hole and the second through hole are both arranged at the convex portion.

[0020] Optionally, a connecting groove is provided at one end of the clamping base away from the supporting column, and the connecting groove is used to connect with the driving member so that the clamping base, the supporting column and the clamping end cover can rotate synchronously relative to the stationary part under the drive of the driving member.

[0021] A thermal gradient test system comprises the thermal gradient test device mentioned above.

[0022] The beneficial effects of the thermal gradient test device and system provided by the embodiments of the utility model include:

[0023] An embodiment of the utility model provides a thermal gradient test device, which includes a gas-electric hybrid slip ring and a mounting bracket device. The gas-electric hybrid slip ring has a rotating part and a stationary part that are connected to each other. The clamping device is connected to the rotating part so that the clamping device can rotate relative to the stationary part. At the same time, the rotating part and the stationary part have an electrical conduction combination and an air conduction structure, thereby ensuring that the rotating part and the stationary part can maintain electrical conduction and air conduction during relative rotation. The clamping device includes a clamping end cover, a support column and a clamping base. The clamping end cover and the clamping base are respectively connected to the two ends of the support column. The clamping end cover has a plurality of first mounting parts arranged around the support column. The clamping base has a plurality of second mounting parts arranged around the support column. The first mounting part and the second mounting part are used to mount the two ends of the test piece. In this way, the multiple test pieces are fixed around the support column through the clamping end cover and the clamping base. The support column is provided with a thermocouple and a cold air duct, which is connected to the air conduction structure and is used to provide cold air to the side of the test piece close to the support column, while ensuring that the test piece maintains air conduction with the stationary parts during the rotation process; the thermocouple is electrically connected to the electrical conduction structure and is used to detect the temperature of the cold air side of the test piece and ensure that the test piece maintains electrical conduction with the stationary parts during the rotation process. The thermal gradient test device provides cold air to the side of the test piece close to the support column by setting a cold air duct, and ensures the cooling temperature by detecting the thermocouple, so that when the side of the test piece away from the support column is subjected to high-temperature combustion gas of a preset temperature, a specific temperature gradient can be formed in the test piece, and through the electrical conduction structure and the air conduction structure in the gas-electric hybrid slip ring, the clamping device drives the test piece to rotate, so as to achieve high-temperature combustion gas testing on multiple test pieces at the same time, and the supply of cold air and the normal operation of the thermocouple can be guaranteed.

[0024] The embodiment of the utility model also provides a thermal gradient test system, which includes the above-mentioned thermal gradient test device. Since the thermal gradient test system includes the above-mentioned thermal gradient test device, it is also capable of ensuring that a specific temperature gradient can be formed in the test pieces when performing high-temperature gas tests on multiple test pieces at the same time, which helps to achieve the material performance characterization in a simulated real service environment and ensure the test effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above features and advantages of the present invention can be better understood after reading the detailed description of the embodiments of the present disclosure in conjunction with the following drawings. In the drawings, the components are not necessarily drawn to scale, and components with similar related properties or features may have the same or similar reference numerals.

[0026] Figure 1 A schematic structural diagram of a thermal gradient test system provided according to one aspect of the utility model is shown;

[0027] Figure 2A schematic structural diagram of a thermal gradient test device provided according to one aspect of the utility model is shown;

[0028] Figure 3 A schematic structural diagram of a gas-electric hybrid slip ring in a thermal gradient test device provided according to one aspect of the utility model is shown;

[0029] Figure 4 A schematic structural diagram of a gas-electric hybrid slip ring in a thermal gradient test device provided according to one aspect of the utility model is shown in another perspective;

[0030] Figure 5 A schematic structural diagram of a test piece provided according to one aspect of the utility model is shown;

[0031] Figure 6 A schematic structural diagram of a clamping end cover in a thermal gradient test device provided according to one aspect of the utility model is shown;

[0032] Figure 7 A schematic structural diagram of a clamping end cover in a thermal gradient test device provided according to one aspect of the utility model from another perspective is shown;

[0033] Figure 8 A schematic diagram of the connection structure between the support column and the clamping base provided according to one aspect of the utility model is shown;

[0034] Fig. 9 Shows Figure 8 A schematic diagram of the structure shown in another viewing angle;

[0035] Fig.10 Shows Figure 8 A cross-sectional structural diagram of the structure shown;

[0036] Fig.11 A partial structural schematic diagram of a thermal gradient testing device provided according to one aspect of the utility model is shown.

[0037] Reference numerals:

[0038] 10- thermal gradient test system; 100- thermal gradient test device; 110- gas-electric hybrid slip ring; 111- stationary component; 112- rotating component; 113- lead channel; 114- cold air channel; 115- thermocouple lead outlet; 116- cold air outlet; 117- bolt hole; 120- clamping device; 121- clamping end cover; 122- through hole; 123- square groove; 124- first mounting part; 130- support column; 131- cavity; 132- raised part; 133- first through hole; 134- second through hole; 135- cold air duct; 136- thermocouple sleeve; 137- square convex edge; 138- limit part; 140- clamping base; 141- second mounting part; 142- connecting groove; 211- high temperature gas injection part; 212- infrared temperature detection part; 213- driving part;

[0039] 20-Test piece. DETAILED DESCRIPTION

[0040] The present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. Note that the aspects described below in conjunction with the accompanying drawings and specific embodiments are only exemplary and should not be construed as limiting the scope of protection of the present invention.

[0041] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", "vertical" and the like appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used, rather than indicating or implying that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present utility model.

[0042] At the same time, it should be noted that the terms "first", "second", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified or limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, an integral connection, or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or the internal communication of two components, etc. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] The following is an explanation of the relevant terms that may appear in this utility model:

[0045] Combustion environment: The high-speed combustion environment formed by the fuel mixing, flow and combustion in the combustion chamber of an aircraft engine or gas turbine. The typical combustion environment is extremely complex, mainly including the following environmental media, such as: temperature (high temperature), pressure (high pressure), speed (high-speed airflow), atmosphere (water vapor, oxygen, etc.) and various molten salt impurities (salt compounds formed by alkali metals, alkaline earth metals and halogen elements). Under the combined effect of these environmental media, the materials of hot-end components such as the engine combustion chamber and turbine experience a variety of complex and harsh environments during service, such as frequent thermal cycles, thermal corrosion and thermal erosion, causing rapid damage to the materials of turbine components and resulting in premature failure.

[0046] Durability test: The materials of hot-end components such as combustion chambers and turbines experience a variety of complex and harsh environments during operation, such as frequent thermal gradient cycle gas shock, which causes rapid damage to turbine component materials and even failure. Before the candidate materials are applied, they need to be subjected to durability performance assessments in a variety of simulated service environments to confirm their service behavior and lifespan and whether they meet the design requirements. Usually, a combustion bench is used to simulate the fuel mixing, flow, and high-speed gas formed by combustion in the engine combustion chamber to test the environmental service behavior and durability of high-temperature structural materials and components.

[0047] Thermal gradient: Thermal gradient is also called temperature gradient, which is the speed and direction of temperature change.

[0048] Figure 1 FIG. 1 shows a schematic diagram of the structure of a thermal gradient test system 10 provided in this embodiment. Figure 2 The schematic diagram of the thermal gradient test device 100 provided in this embodiment is shown. Figure 1-Figure 2 This embodiment provides a thermal gradient test device 100 and also provides a thermal gradient test system 10.

[0049] The thermal gradient test system 10 includes the thermal gradient test device 100 described above, and also includes other structural parts for performing thermal gradient tests, such as a high-temperature gas injection part 211 and an infrared temperature detection part 212. The high-temperature gas injection part 211 is used to inject high-temperature gas to the test piece 20 in the thermal gradient test device 100, so that the side of the test piece 20 away from the support column 130 is subjected to high temperature, and the temperature of the high-temperature side of the test piece 20 is detected by the infrared temperature detection part 212. At the same time, during the test, the thermal gradient test device 100 injects cold air to the test piece 20, so that the side of the test piece 20 close to the support column 130 is subjected to low temperature, and the temperature of the low-temperature side of the test piece 20 is detected by a thermocouple. In this way, by providing high-temperature gas and cold air of specific temperatures to both sides of the test piece 20, a specific temperature gradient is formed on the test piece 20, and the thermal gradient high-temperature gas environment assessment of the test piece 20 is achieved. Moreover, the thermal gradient test system 10 is particularly suitable for evaluating the performance of ceramic-based composite materials and their protective coatings in high-temperature gas environments, and can effectively support the development of hot-end components of ceramic-based composite materials for aircraft engines.

[0050] Furthermore, the thermal gradient test system 10 also includes a driving member 213, which is transmission-connected to the clamping device 120 of the thermal gradient test device 100, thereby driving the clamping device 120 and a plurality of test pieces 20 mounted thereon to rotate relative to the high-temperature gas injection member 211, thereby ensuring the consistency of the gas environment in which each test piece 20 is located through rotation, thereby ensuring that thermal gradient tests are performed on a plurality of test pieces 20 at the same time, which helps to improve the test assessment effect and the accuracy of the test results.

[0051] The thermal gradient test device 100 includes a gas-electric hybrid slip ring 110 and a mounting bracket device. The gas-electric hybrid slip ring 110 has a rotating component 112 and a stationary component 111 connected to each other. The clamping device 120 is connected to the rotating component 112 so that the clamping device 120 can rotate relative to the stationary component 111. At the same time, the rotating component 112 and the stationary component 111 have an electrical conduction connection and an air conduction structure, so that the rotating component 112 and the stationary component 111 can maintain electrical conduction and air conduction during relative rotation. The clamping device 120 includes a clamping end cover 121, a support column 130 and a clamping base 140. The clamping end cover 121 and the clamping base 140 are respectively connected to the two ends of the support column 130. The clamping end cover 121 has a plurality of first mounting portions 124 arranged around the support column 130. The clamping base 140 has a plurality of second mounting portions 141 arranged around the support column 130. The first mounting portions 124 and the second mounting portions 141 are used to mount the two ends of the test piece 20. In this way, the plurality of test pieces 20 are fixed around the support column 130 through the clamping end cover 121 and the clamping base 140. A thermocouple and a cold air duct 135 are provided on the support column 130. The cold air duct 135 is connected to the air conduction structure, and is used to provide cold air to the side of the test piece 20 close to the support column 130, while ensuring that air conduction is maintained with the stationary component 111 during rotation; the thermocouple is electrically connected to the electrical conduction structure, and is used to detect the temperature of the cold air side of the test piece 20, while ensuring that electrical conduction is maintained with the stationary component 111 during rotation. The thermal gradient testing device 100 provides cold air to the side of the test piece 20 close to the support column 130 by setting a cold air duct 135, and ensures the cooling temperature by detecting the thermocouple. In this way, when the side of the test piece 20 away from the support column 130 is subjected to high-temperature combustion gas of a preset temperature, a specific temperature gradient can be formed in the test piece 20. In addition, through the electrical conduction structure and the gas conduction structure in the gas-electric hybrid slip ring 110, the clamping device 120 drives the test piece 20 to rotate, so as to achieve high-temperature combustion gas testing on multiple test pieces 20 at the same time, which can ensure the supply of cold air and the normal operation of the thermocouple.

[0052] The thermal gradient test device 100 provided in this embodiment is further described below:

[0053] Figure 3 FIG. 1 shows a schematic structural diagram of a gas-electric hybrid slip ring 110 in a thermal gradient test device 100 provided in this embodiment. Figure 4 FIG. 1 shows a schematic diagram of the structure of the gas-electric hybrid slip ring 110 in the thermal gradient test device 100 provided in this embodiment from another perspective. Figure 1-Figure 4The gas-electric hybrid slip ring 110 can directly adopt existing commercial components. Specifically, the gas-electric hybrid slip ring 110 includes a rotating component 112 and a stationary component 111 which are rotatably connected to each other. The rotating component 112 is provided with a plurality of bolt holes 117, so that the rotating component 112 can be fixedly connected with the clamping device 120 through connecting bolts (not shown in the figure), that is, during the test, the rotating component 112 rotates synchronously with the clamping device 120, and when rotating, the stationary component 111 can remain stationary with the external device, thereby ensuring the connection reliability between the electric hybrid slip ring and the external device.

[0054] Furthermore, the stationary component 111 is provided with a lead wire channel 113, and the lead wire channel 113 on the stationary component 111 is used to introduce the external lead wire into the gas-electric hybrid slip ring 110. The rotating component 112 is provided with a thermocouple lead wire outlet 115, and the thermocouple lead wire outlet 115 on the rotating component 112 is used to lead out the thermocouple lead wire. The thermocouple lead wire and the external lead wire realize electrical conduction during the rotation process under the action of the electrical conduction structure. Specifically, the electrical conduction structure can adopt a structure that can realize rotation conduction in the prior art. For example, the electrical conduction structure can be set to have an annular conductive structure. During the rotation of the rotating component 112, the thermocouple lead wire maintains conductive contact with the annular conductive structure, thereby realizing electrical conduction.

[0055] The air conduction structure includes a cold air channel 114 provided on the stationary component 111 and a hot cold air outlet 116 provided on the rotating component 112. The cold air channel 114 and the hot cold air outlet 116 are kept in communication during the rotation process, so that the air conduction during the test process can be ensured. Optionally, the stationary component 111 and the rotating component 112 are both circular, the cold air channel 114 is provided at the axis of the stationary component 111, and the hot cold air outlet 116 is provided at the axis of the rotating component 112. The rotation axis of the rotating component 112 is its own axis. In this way, even if the rotating component 112 rotates relative to the stationary component 111, the relative position of the cold air channel 114 and the hot cold air outlet 116 does not change, thereby achieving air conduction during the rotation process.

[0056] Figure 5 : shows a schematic structural diagram of a test piece 20 provided in this embodiment, Figure 6 FIG. 1 shows a schematic structural diagram of a clamping end cover 121 in a thermal gradient test device 100 provided in this embodiment. Figure 7 FIG. 1 shows a schematic structural diagram of the clamping end cover 121 in the thermal gradient test device 100 provided in this embodiment from another perspective. Figure 8 FIG. 1 shows a schematic diagram of the connection structure between the support column 130 and the clamping base 140 provided in this embodiment. Fig. 9 for Figure 8 A schematic diagram of the structure shown in another perspective. Fig.10 for Figure 8 Please refer to the cross-sectional structure diagram of the structure shown. Figure 1-Figure 10 In this embodiment, the clamping device 120 includes a clamping end cap 121, a support column 130 and a clamping base 140. The clamping end cap 121 and the clamping base 140 are respectively connected to the two ends of the support column 130, and the clamping end cap 121 and the clamping base 140 are respectively provided with a first mounting portion 124 and a second mounting portion 141. The test piece 20 is a long strip plate-like piece, and the two ends of the length direction thereof are clamped and fixed by the first mounting portion 124 and the second mounting portion 141, so that the test piece 20 is limited on one side of the support column 130. At the same time, in this embodiment, the thickness direction of the test piece 20 extends along the radial direction of the support column 130, so that the thermal gradient formed during the test is distributed along the thickness of the test piece 20.

[0057] Specifically, in this embodiment, the support column 130 and the clamping base 140 are an integrated structure, and the clamping base 140 is located at the lower end of the support column 130. A plurality of second mounting portions 141 are arranged around the support column 130 on the clamping base 140, and a plurality of first mounting portions 124 are arranged around the support column 130 on the clamping end cover 121. The plurality of first mounting portions 124 and the plurality of second mounting portions 141 are arranged one by one, and each first mounting portion 124 and the second mounting portion 141 directly below it can realize the clamping and fixing of a test piece 20, so that the clamping device 120 can clamp and fix a plurality of test pieces 20 around the support column 130 at the same time. It should be noted that the specific number of the first mounting portion 124 and the second mounting portion 141 can be set according to the needs, and this embodiment does not limit it.

[0058] The first mounting portion 124 is a groove provided on the clamping end cover 121. When clamping, the upper end of the test piece 20 is inserted into the groove to achieve clamping and fixing of the upper end of the test piece 20. Similarly, the second mounting portion 141 can also be configured as a groove provided on the clamping base 140. When clamping, the lower end of the test piece 20 is inserted into the groove to achieve clamping and fixing of the lower end of the test piece 20. Furthermore, when in use, the gap between the test piece 20 and the groove can be adjusted by placing a metal gasket (not shown) in the groove to ensure the distance between the test piece 20 and the support column 130.

[0059] It should be noted that the structure of the first mounting portion 124 and the second mounting portion 141 is not limited here. It can be understood that in some other embodiments, the structure of clamping the two ends of the test piece 20 on the clamping end cover 121 and the clamping base 140 can be set according to needs. For example, the two ends of the test piece 20 can be clamped and fixed by tightening the top screw.

[0060] Optionally, a through hole 122 is provided on the clamping end cover 121, and the end of the support column 130 passes through the through hole 122 and is fixedly connected to the rotating component 112, thereby realizing the connection between the clamping device 120 and the gas-electric hybrid slip ring 110. Furthermore, a square groove 123 is also provided on the clamping end cover 121, and a square convex ridge 137 is provided on the support column 130. The square convex ridge 137 is engaged with the square groove 123, so that the circumferential position of the clamping end cover 121 and the support column 130 is fixed, ensuring that the clamping end cover 121 rotates synchronously with the support column 130 during use. Specifically, the square groove 123 is provided on the lower end surface of the clamping end cover 121, and does not penetrate the upper end surface of the clamping end cover 121. At the same time, a limiting portion 138 is also provided on the lower side of the square convex ridge 137, and the limiting portion 138 abuts against the lower end surface of the clamping end cover 121, thereby limiting the downward movement of the clamping end cover 121.

[0061] At the same time, the support column 130 has a cavity 131 with an upper opening inside. When the support part is fixedly connected to the rotating component 112, the cavity 131 is connected to the hot and cold air outlet 116 and the thermocouple lead outlet 115, so that the thermocouple lead can be arranged in the cavity 131, and the cold air duct 135 provided on the support column 130 is connected to the hot and cold air outlet 116 through the cavity 131, thereby forming a channel for cold air to flow. Further, in order to prevent cold air leakage, a sealing ring can be provided at the connection between the support column 130 and the rotating component 112.

[0062] Specifically, the support column 130 is provided with a first through hole 133 and a second through hole 134, a cold air conduit 135 is installed at the first through hole 133, and the second through hole 134 is used to install a thermocouple. The first through hole 133 and the second through hole 134 are both connected to the cavity 131 inside the support column 130, so that cold air can enter the first through hole 133 through the cavity 131 and then be ejected from the cold air conduit 135, and at the same time, the thermocouple can enter the second through hole 134 from the cavity 131, and detect the cold side temperature of the test piece 20 outside the support column 130. In this embodiment, the clamping device 120 also includes a thermocouple sleeve 136 arranged on the support column 130. The thermocouple sleeve 136 is installed at the second through hole 134. After installation, at least the sensing part of the thermocouple is installed in the thermocouple sleeve 136, so that the thermocouple is protected by the thermocouple sleeve 136, so that the thermocouple can be as close to the test piece 20 as possible, or even close to the surface of the test piece 20.

[0063] Optionally, the first through hole 133 and the second through hole 134 both include threaded holes, and the cold air conduit 135 and the thermocouple sleeve 136 are respectively fixed at the first through hole 133 and the second through hole 134 by threaded connection. It can be understood that in order to prevent cold air leakage, sealing rings can be provided at the installation locations of the cold air conduit 135 and the thermocouple sleeve 136 for sealing.

[0064] Furthermore, a protrusion 132 is formed on the outer periphery of the middle part of the support column 130, and the first through hole 133 and the second through hole 134 are both opened at the protrusion 132. The support column 130 has a sufficient thickness to meet the requirements of opening the first through hole 133 and the second through hole 134 and installing the cold air duct 135 and the thermocouple sleeve 136, thereby reducing the weight.

[0065] Further, the line connecting the first mounting portion 124 and the second mounting portion 141 is perpendicular to the air outlet direction of the cold air duct 135, so that after the test piece 20 is installed, the air outlet direction of the cold air duct 135 is perpendicular to the length direction of the test piece 20. Specifically, the line connecting the first mounting portion 124 and the second mounting portion 141 is parallel to the axis of the support column 130, and the air outlet direction of the cold air duct 135 is along the radial direction of the support column 130.

[0066] Furthermore, the distance between the connecting line of the first mounting portion 124 and the second mounting portion 141 and the air outlet of the cold air duct 135 is less than or equal to 3 mm, so that after the test piece 20 is installed, the distance between the air outlet of the cold air duct 135 and the test piece 20 is less than or equal to 3 mm, ensuring that the cold air sprayed from the air outlet of the cold air duct 135 to the test piece 20 can effectively act on the test piece 20.

[0067] In this embodiment, the first mounting portion 124, the second mounting portion 141 and the cold air duct 135 are at the same circumferential position of the support column 130, so that the multiple cold air ducts 135 correspond to the multiple test pieces 20 one by one. Specifically, the multiple first mounting portions 124 and the multiple second mounting portions 141 are distributed around the support column 130, and accordingly, the multiple cold air ducts 135 are distributed at intervals along the circumference of the support column 130, thereby forming a ring of cold air ducts 135. That is, in the description of this embodiment, the ring of cold air ducts 135 refers to a structure formed by a circumferential array distribution along the circumference of the support column 130.

[0068] In this embodiment, two rings of cold air conduits 135 are provided on the support column 130, and the two rings of cold air conduits 135 are respectively a first ring of cold air conduits 135 and a second ring of cold air conduits 135. The first ring of cold air conduits 135 and the second ring of cold air conduits 135 respectively include a plurality of cold air conduits 135 distributed along the circumference of the support column 130. In other words, two circles of first through holes 133 are provided on the support column 130. At the same time, along the axial direction of the support column 130 (i.e., Figure 2 In the up and down direction shown in the figure, the first cold air duct 135 ring, the thermocouple and the second cold air duct 135 ring are distributed at one time. In other words, the second through hole 134 on the support part is located between the two circles of the first through hole 133.

[0069] Specifically, in this embodiment, two second through holes 134 are provided on the support column 130, and the two second through holes 134 are distributed at 180 degrees. Accordingly, the number of thermocouple sleeves 136 is two, and two thermocouples can be installed on the support column 130. That is, in this embodiment, the number of thermocouples installed does not necessarily correspond to the test piece 20 one by one, and the actual number of thermocouples is not limited to two, and it can be specifically set according to needs.

[0070] In this embodiment, a connection groove 142 is provided at one end of the clamping base 140 away from the support column 130, and the connection groove 142 is used to connect with the driving member 213, so that the clamping base 140 can be driven to rotate under the action of the driving member 213, and then the clamping device 120 and the rotating component 112 fixedly connected thereto can be driven to rotate synchronously relative to the stationary component 111. Specifically, the driving member 213 can be a motor, and the connection groove 142 is a narrow and long groove, which is installed in cooperation with the rotor of the motor, so that when the rotor rotates, the clamping base 140 is driven to rotate, and then the clamping device 120 is driven to rotate.

[0071] The thermal gradient test device 100 and thermal gradient test system 10 provided by the embodiment of the utility model, before the test, first install the cold air duct 135 to the first through hole 133, and the circumferential number position of the cold air duct 135 corresponds to the circumferential number position of the first mounting portion 124 and the second mounting portion 141. Then, the thermocouple lead is led out from the thermocouple lead outlet 115 of the gas-electric hybrid slip ring 110, passes through the cavity 131 on the support column 130, leads out from the second through hole 134 and connects to the thermocouple sleeve 136, and then the thermocouple sleeve 136 containing the thermocouple is installed on the second through hole 134, and then the gas-electric hybrid slip ring 110 and the support column 130 are installed and fixed. The structure after installation and fixation is as shown in FIG. Fig.11 As shown. Then, the lower end of the test piece 20 is inserted into the second mounting portion 141, and then the square groove 123 of the clamping end cover 121 is aligned with the square ridge 137 on the support column 130 for matching installation. During the installation process, the upper end of the test piece 20 is installed in the first mounting portion 124, and the upper and lower ends of the test piece 20 are fixed thereby, thus completing the assembly of the thermal gradient test device 100. Since the clamping end cover 121 is installed after the starting hybrid slip ring, the diameter of the through hole 122 of the clamping end cover 121 should be larger than the maximum diameter of the gas-electric hybrid slip ring 110, so that the clamping end cover 121 can pass through the gas-electric hybrid slip ring 110 to be installed on the support column 130.

[0072] Finally, the thermal gradient test device 100 is connected to the motor, and the lead channel 113 of the gas-electric hybrid slip ring 110 is connected to the external lead, so as to realize the transmission of the thermocouple signal, and the cold air channel 114 of the gas-electric hybrid slip ring 110 is connected to the external cold air. That is, the external equipment mentioned above may include the electric control equipment and the cold air supply equipment.

[0073] During the test, the clamping device 120 and the test piece 20 clamped thereon are driven to rotate by the motor, and the stationary component 111, the external cold air and the lead wire do not rotate. The cold air duct 135 sprays cold air to one side of the test piece 20, and the temperature of this side is detected by the thermocouple. At the same time, the high-temperature gas injection component 211 sprays high-temperature gas to the other side of the test piece 20, and the temperature of this side is detected by the infrared temperature detection component 212. By adjusting the high-temperature gas temperature and the cold air flow rate, it is ensured that both sides of the thickness direction of the test piece 20 have specific temperatures, thereby forming a specific temperature gradient in the thickness direction of the test piece 20.

[0074] The thermal gradient test device 100 and the thermal gradient test system 10 can simultaneously implement high-temperature gas environment assessment of multiple test pieces 20 under thermal gradient conditions, significantly reducing the test cost and cycle, more accurately simulating the service environment temperature state of the test piece 20, and characterizing the high-temperature gas environment performance of the test piece 20, thereby effectively supporting the design and application of the hot end of the aircraft engine. At the same time, in the gas assessment state, each test piece can ensure the consistency of the gas environment through rotational motion, improving the test assessment effect and the accuracy of the test structure.

[0075] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by any technician familiar with the technology in this field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention.

Claims

1. A thermal gradient test device, characterized in that: The thermal gradient test device comprises: A gas-electric hybrid slip ring, wherein the gas-electric hybrid slip ring has a rotating part and a stationary part connected to each other, and an electrical conduction structure and a gas conduction structure are provided between the rotating part and the stationary part; and a clamping device connected to the rotating component so that the clamping device can rotate relative to the stationary component; Wherein, the clamping device includes a clamping end cover, a support column and a clamping base; the clamping end cover and the clamping base are respectively connected to the two ends of the support column, the clamping end cover has a plurality of first mounting parts arranged around the support column, and the clamping base has a plurality of second mounting parts arranged around the support column, and the first mounting parts and the second mounting parts are used to clamp the two ends of the test piece; a thermocouple and a cold air duct are arranged on the support column, and the cold air duct is connected to the air conduction structure to provide cold air to the side of the test piece close to the support column; the thermocouple is electrically connected to the electrical conduction structure and is used to detect the cooling temperature.

2. The thermal gradient test device according to claim 1, characterized in that: The first mounting portion, the second mounting portion, and the cold air conduit are located at the same circumferential position on the support column, so that the plurality of cold air conduits correspond to the plurality of test pieces one by one.

3. The thermal gradient test device according to claim 2, characterized in that: The support column is provided with a first cold air duct ring and a second cold air duct ring, and the first cold air duct ring and the second cold air duct ring respectively include a plurality of cold air ducts distributed along the circumference of the support column; along the axial direction of the support column, the first cold air duct ring, the thermocouple and the second cold air duct ring are distributed in sequence.

4. The thermal gradient test device according to claim 1, characterized in that: The clamping end cover is provided with a through hole, and the end of the support column passes through the through hole and is fixedly connected to the rotating component; The clamping end cover is also provided with a square groove, and the support column is provided with a square convex ridge, and the square convex ridge is engaged with the square groove to fix the circumferential position of the clamping end cover and the support column.

5. The thermal gradient test device according to claim 1, characterized in that: A line connecting the first mounting portion and the second mounting portion is perpendicular to an air outlet direction of the cold air duct.

6. The thermal gradient test device according to claim 1, characterized in that: The distance between the connecting line of the first mounting portion and the second mounting portion and the air outlet of the cold air duct is less than or equal to 3 mm.

7. The thermal gradient test device according to claim 1, characterized in that: The support column is provided with a first through hole and a second through hole, and the cold air duct is installed at the first through hole; the clamping device also includes a thermocouple sleeve installed at the second through hole, and the sensing part of the thermocouple is located in the thermocouple sleeve.

8. The thermal gradient test device according to claim 7, characterized in that: The support column has a cavity inside, the cavity is connected to the air conduction structure, and the first through hole is connected to the cavity, so that cold air passes through the cavity into the first through hole and then sprays out from the cold air duct; the cavity is connected to the electrical conduction structure, and the second through hole is connected to the cavity, so that the lead wire of the thermocouple passes from the cavity into the second through hole; A convex portion is formed on the outer periphery of the middle portion of the support column, and the first through hole and the second through hole are both arranged at the convex portion.

9. The thermal gradient test device according to claim 1, characterized in that: A connecting groove is provided at one end of the clamping base away from the supporting column, and the connecting groove is used to connect with the driving member so that the clamping base, the supporting column and the clamping end cover can rotate synchronously relative to the stationary part under the drive of the driving member.

10. A thermal gradient test system, characterized in that: The thermal gradient testing system comprises the thermal gradient testing device according to any one of claims 1-9.

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