Device for testing thermal shock resistance of high-temperature anti-oxidation coating

By designing a high-temperature anti-oxidation coating anti-shock performance test device, the uniform heating and cooling of samples is achieved using electric furnaces and driving mechanisms, the problems of low efficiency and safety hazards in the prior art are solved, and efficient hot and cold cycle testing is achieved.

CN223259616UActive Publication Date: 2025-08-22GUANGXI KAISEN THERMAL ENERGY TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202422379447.6
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-29
Publication Date
2025-08-22
Estimated Expiration
2034-09-29

AI Technical Summary

Technical Problem

The existing high-temperature anti-oxidation coating thermal shock resistance testing methods are inefficient, and there are uneven heating and safety hazards, making it difficult to achieve efficient hot and cold cycle testing.

Method used

A high-temperature anti-oxidation coating thermal shock resistance performance test device is designed, including an electric furnace, a ceramic tube, a guide bracket, a ceramic rod and a driving mechanism. The drive mechanism drives the ceramic rod to move in and out in the ceramic tube to achieve uniform heating and cooling of the sample. The temperature is accurately controlled by an electric thermocouple and an electric furnace controller, and multiple hot and cold cycle tests are carried out in combination with the coolant.

Benefits of technology

The uniform heating and hot and cold cycle of the samples are achieved, the testing efficiency is improved, the safety and accuracy of the test are ensured, and the thermal shock resistance performance evaluation of the high-temperature anti-oxidation coating can be repeated multiple times.

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Abstract

The thermal shock resistance testing device comprises an electric furnace, a ceramic tube is horizontally arranged on the electric furnace, one end of the ceramic tube is closed, and the other end of the ceramic tube is open; the guide bracket and the open end of the ceramic tube are arranged at an interval; one end of the ceramic rod is provided with an objective table, and the other end of the ceramic rod penetrates through the guide bracket and is connected with the driving mechanism; wherein the driving mechanism drives the ceramic rod and the objective table to be movably inserted into the ceramic tube. The device has the characteristics that the sample can be uniformly heated, the thermal-thermal cycling effect is realized, the thermal shock resistance of the high-temperature oxidation-resistant coating of the sample can be favorably tested, and the like.
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Description

Technical Field

[0001] The utility model relates to a testing device, in particular to a device for testing the thermal shock resistance of a high-temperature anti-oxidation coating. Background Art

[0002] High-temperature oxidation-resistant coatings are typically applied using techniques such as SPS sintering, plasma spraying, and electron beam deposition to bond ceramic or composite materials to the surface of a metal substrate, protecting the substrate from high-temperature oxidation. Due to differences in thermal conductivity between the high-temperature oxidation-resistant coating and the metal substrate, the coating can be subject to structural stresses, thermal stresses, and phase change stresses, leading to surface cracking or delamination. Thermal shock resistance testing and evaluation of oxidation-resistant coatings provide experimental data for predicting their lifespan.

[0003] Currently, common testing methods for antioxidant coatings include water quenching, air quenching, and natural cooling. Flame heating and electric furnace heating are two methods. Heating one sample at a time is inefficient. Single-sided heating with a flame burner, while fast, suffers from low temperature control accuracy and uneven heating during the test. Conventional muffle furnaces are also used, but these methods make placing and removing samples during thermal shock tests difficult and pose a risk of burns, resulting in low test efficiency. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to provide a device for testing the thermal shock resistance of high-temperature anti-oxidation coatings.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A device for testing the thermal shock resistance of high-temperature antioxidant coatings comprises an electric furnace with a ceramic tube horizontally arranged on the electric furnace, one end of the ceramic tube being closed and the other end being open; a guide bracket, the guide bracket being spaced apart from the open end of the ceramic tube; and a ceramic rod, one end of the ceramic rod being provided with a loading platform and the other end passing through the guide bracket and connected to a driving mechanism; wherein the driving mechanism drives the ceramic rod and the loading platform to be movable and inserted into the ceramic tube.

[0007] Furthermore, the driving mechanism includes a support frame, the support frame is equipped with a guide rail, and screw bearing seats are installed at both ends of the guide rail; a screw drive motor, the screw drive motor is installed on the support frame; a screw, one end of the screw is rotatably connected to the screw bearing seat, and the other end passes through another screw bearing seat and is transmission-connected to the screw drive motor; a slider, one end of the slider is slidably sleeved on the guide rail, and the other end is threadedly connected to the screw; and a clamping member, the clamping member is installed on the slider and is used to clamp the ceramic rod.

[0008] Furthermore, the clamping member includes a pillar; a first half hoop, which is installed on the pillar and has first connecting plates at both ends; a second half hoop, which has second connecting plates at both ends; and a bolt, which is buckled and covered on the first half hoop to form a hoop, and the second connecting plates on both ends are connected to the first connecting plates by bolts.

[0009] Furthermore, the high-temperature anti-oxidation coating thermal shock resistance testing device of the present invention also includes a screw controller, which is electrically connected to the screw drive motor.

[0010] Furthermore, the electric furnace is provided with a thermocouple, a furnace controller and a display screen. The thermocouple and the display screen are electrically connected to the furnace controller. The thermocouple is used to monitor the heating temperature of the electric furnace.

[0011] Furthermore, the high-temperature anti-oxidation coating thermal shock resistance testing device of the present invention also includes an adjustment button, which is electrically connected to the electric furnace controller.

[0012] Furthermore, the guide bracket includes a support rod and a guide sleeve, and the guide sleeve is installed on the support rod and is used for sliding sleeve connection with the ceramic rod.

[0013] Furthermore, the utility model provides a high-temperature anti-oxidation coating thermal shock resistance testing device, which also includes a plug. One end of the ceramic tube is equipped with a plug, and the plug is used to seal the ceramic tube.

[0014] Furthermore, the utility model provides a high-temperature anti-oxidation coating thermal shock resistance testing device which also includes a heat insulating member, and the ceramic tube is connected to the electric furnace via the heat insulating member.

[0015] Furthermore, the utility model provides a device for testing the thermal shock resistance of a high-temperature anti-oxidation coating, which also includes a container. The top of the container is open and is installed below the ceramic rod close to the ceramic tube for containing coolant.

[0016] Furthermore, the high-temperature anti-oxidation coating thermal shock resistance testing device of the present invention also includes a workbench, which is used to support and install the electric furnace, the guide bracket and the driving mechanism.

[0017] Compared with the prior art, the beneficial effects of the present invention are:

[0018] The utility model can evenly heat and perform hot and cold cycling on samples. The driving mechanism drives the ceramic rod to be inserted into and pulled out of the ceramic tube, and the stage on the ceramic rod follows the ceramic rod to be inserted into and pulled out of the ceramic tube; when the stage is in the ceramic tube, the ceramic tube absorbs the heat of the electric furnace to heat the sample on the stage. When the heating reaches the required time, the driving mechanism drives the ceramic rod and the stage out of the ceramic tube, and the sample on the stage can be clamped by a high-temperature resistant clamp and placed in the coolant of the container for cooling. The cooled sample can be placed on the stage again, and the above operation can be repeated for multiple cycles to achieve the hot and cold cycling of the sample, and the thermal shock resistance test of the high-temperature antioxidant coating can be carried out. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0020] Figure 1 This is a structural schematic diagram of a device for testing the thermal shock resistance of high-temperature anti-oxidation coatings according to the present invention.

[0021] Figure 2 This is a schematic structural diagram of the clamping member in the present utility model.

[0022] Figure 3 It is a structural schematic diagram of the guide bracket in the utility model.

[0023] Reference numerals and corresponding component names in the figures:

[0024] 1-electric furnace, 101-electric thermocouple, 102-electric furnace controller, 103-display screen, 104-adjustment button, 2-stage, 3-ceramic rod, 4-plug, 5-thermal insulation, 6-guide bracket, 61-guide sleeve, 62-support rod, 7-clamping member, 71-first half hoop, 711-first connecting plate, 72-pillar, 73-bolt, 74-second half hoop, 741-second connecting plate, 8-screw controller, 9-screw drive motor, 10-support frame, 11-slider, 12-screw, 13-screw bearing seat, 14-coolant, 15-container, 16-workbench, 17-ceramic tube, 18-guide rail. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] like Figures 1 to 3 As shown, a device for testing the thermal shock resistance of high-temperature antioxidant coatings includes an electric furnace 1, a guide bracket 6, a ceramic rod 3, a container 15, and a workbench 16. A ceramic tube 17 is horizontally provided on the electric furnace 1, with one end of the ceramic tube 17 closed and the other end open; the guide bracket 6 is spaced apart from the open end of the ceramic tube 17; a loading platform 2 is provided at one end of the ceramic rod 3, and the other end passes through the guide bracket 6 and is connected to a driving mechanism; wherein the driving mechanism drives the ceramic rod 3 and the loading platform 2 to be movable and inserted into the ceramic tube 17. The workbench 16 is used to support and install the electric furnace 1, the guide bracket 6, the container 15, and the driving mechanism. The top of the container 15 is open and is installed below the ceramic rod 3 close to the ceramic tube 17, and is used to contain the coolant 14.

[0027] The loading platform 2 can extend outward relative to the ceramic rod 3, and its length is less than the width of the heating chamber of the electric furnace. By increasing the length of the loading platform, multiple samples can be placed on the loading platform at the same time for simultaneous heating.

[0028] The guide bracket 6 supports the sliding ceramic rod 3. The ceramic rod is accurately inserted into the ceramic tube under the support of the guide bracket.

[0029] The driving mechanism serves as a power source for the movement of the ceramic rod, and can drive the ceramic rod to move linearly relative to the ceramic tube. When the ceramic rod moves, the stage can be driven to move.

[0030] It is understandable that, in the initial state, the ceramic rod 3 and the stage 2 are located outside the ceramic tube 17 .

[0031] The electric furnace 1 is equipped with a thermocouple 101, a furnace controller 102, adjustment buttons 104, and a display screen 103. The thermocouple 101, adjustment buttons 104, and display screen 103 are all electrically connected to the furnace controller 102. The thermocouple 101 is used to monitor the heating temperature of the electric furnace 1. The adjustment buttons 104 include a start button, a working button, and an emergency stop button. The start button is used to control the electric furnace to start and standby. The working button is used to control the electric furnace to start working. The emergency stop button is used to stop the electric furnace in an emergency.

[0032] The heating temperature and time can be displayed on the display screen 103. The electric furnace controller can adjust the electric furnace to the required heating temperature.

[0033] The temperature of the electric furnace 1 is adjustable, and the ceramic tube can be heated accurately.

[0034] In some embodiments of the present disclosure, a structure of a driving mechanism is provided. Figure 1 As shown, the drive mechanism includes a support frame 10, a lead screw drive motor 19, a lead screw 12, a slider 11, a lead screw controller 8, and a clamp 7. The support frame 10 is mounted with a guide rail 18, with lead screw bearing blocks 13 mounted at both ends. The lead screw drive motor 9 is mounted on the support frame 10. One end of the lead screw 12 is rotationally connected to the lead screw bearing block 13, and the other end passes through the other lead screw bearing block 13 and is transmission-connected to the lead screw drive motor 9. One end of the slider 11 is slidably sleeved on the guide rail 18, and the other end is threadedly connected to the lead screw 12. The clamp 7 is mounted on the slider 11 and is used to clamp the ceramic rod 3. The lead screw controller 8 is electrically connected to the lead screw drive motor 9.

[0035] The screw controller 8 is a PLC structure. The screw controller can set the screw forward rotation time, screw reverse rotation time, heating time and furnace dwell time.

[0036] In some embodiments of the present disclosure, a structure of a clamping member is provided. Figure 2 The clamping member 7 comprises a support 72, a first half hoop 71, a second half hoop 74, and bolts 73. The first half hoop 71 is mounted on the support 72 and has first connecting plates 711 at both ends. The second half hoop 74 has second connecting plates 741 at both ends. The second half hoop 74 is fastened to the first half hoop 71 to form a hoop, and the second connecting plates 741 at both ends are connected to the first connecting plates 711 via bolts 73.

[0037] The first half hoop 71 and the second half hoop 74 are spliced ​​together to form a hoop, which is sleeved on the ceramic rod. The ceramic rod is clamped by the first half hoop 71 and the second half hoop 74 to achieve a fixed connection with the clamping member 7. When the slider drives the clamping member to move, the clamping member drives the ceramic rod to move.

[0038] The first half hoop 71 and the second half hoop 74 are connected by bolts 73, which can facilitate disassembly and splicing installation.

[0039] In some embodiments of the present disclosure, a structure of a guide bracket is provided, which includes a support rod 62 and a guide sleeve 61 . The guide sleeve 61 is mounted on the support rod 62 and is used for sliding engagement with the ceramic rod 3 .

[0040] The guide sleeve 61 can limit the swing of the ceramic rod and enable the ceramic rod to move in a directional manner relative to the ceramic tube.

[0041] It is understandable that the number of guide brackets installed can be 1, 2 or 3, etc. An appropriate number of guide brackets can be installed as needed.

[0042] In some embodiments of the present disclosure, a ceramic tube plugging structure is provided, in which a plug 4 is additionally installed. The plug 4 is installed at one end of the ceramic tube 17 and is used to plug the ceramic tube 17.

[0043] In some embodiments of the present disclosure, in order to prevent the ceramic tube from conducting heat to the furnace body of the electric furnace, a heat insulating member 5 is additionally installed. The ceramic tube 17 is connected to the electric furnace 1 through the heat insulating member 5.

[0044] The heat insulating member 5 is made of a high temperature resistant heat insulating material, which can be rock wool, alumina ceramic fiber or ceramic heat insulating material.

[0045] According to the above embodiment, the working mode of the utility model is:

[0046] Working method:

[0047] In the initial state, the stage 2 on the ceramic rod 3 is located outside the ceramic tube 17, and the sample is placed on the stage 2. The electric furnace 1 is regulated to the required heating temperature by the electric furnace controller 102, and the maximum heating temperature of the electric furnace can reach 1800°C.

[0048] Then, the screw controller 8 controls the screw drive motor to drive the screw to rotate in the forward direction. The screw 12 drives the slider 11 to move along the guide rail 18 toward the ceramic tube 17. At the same time, the slider drives the clamping part 7 to move, and the clamping part 7 clamps the ceramic rod 3 to move toward the ceramic tube. When the forward rotation of the screw reaches the set forward rotation time of the screw, at this time, the screw controller 8 controls the screw drive motor 9 to temporarily work, and the ceramic rod 3 drives the stage 2 to insert into the ceramic tube 17 and is located in the heating space of the electric furnace; the ceramic tube 17 absorbs the heat in the electric furnace 1 to heat the sample on the stage 2.

[0049] When the stage 2 is heated in the ceramic tube 17 for the set heating time, the screw controller 8 controls the screw drive motor 9 to drive the screw 12 to rotate in the opposite direction. The screw 12 drives the slider 11 to move along the guide rail 18 away from the ceramic tube 17. At the same time, the slider 11 drives the clamp 7 to move. The clamp 7 clamps the ceramic rod 3 to move away from the ceramic tube 17. When the screw 12 rotates in the opposite direction for the set screw reverse rotation time, the screw controller 8 controls the screw drive motor 9 to temporarily stop working. The ceramic rod 3 drives the stage 2 to separate from the ceramic tube 17. The stage 2 is then placed outside the electric furnace. A high-temperature resistant clamp or other fixture can be used to clamp the heated sample on the stage. The sample is placed in the coolant 14 contained in the container 15 for cooling. The high-temperature antioxidant coating thermal shock resistance test can be performed. Then, the cooled sample is placed on the stage.

[0050] As the time that the stage 2 is outside the electric furnace 1 reaches the set residence time outside the furnace, the screw controller 8 controls the screw drive motor 9 to drive the screw 12 to rotate forward, and the above operation is repeated. The sample realizes the hot and cold cycle effect, which is conducive to the thermal shock resistance test of the high-temperature antioxidant coating.

[0051] The above embodiments are preferred implementation methods of the present invention and are only used to facilitate the explanation of the present invention. They are not intended to limit the present invention in any form. Any person with ordinary knowledge in the technical field can, without departing from the scope of the technical features of the present invention, make partial changes or modifications to the technical contents disclosed in the present invention and make equivalent embodiments without departing from the technical features of the present invention. These modifications still fall within the scope of the technical features of the present invention.

Claims

1. A device for testing the thermal shock resistance of high-temperature antioxidant coatings, characterized by: include An electric furnace (1), wherein a ceramic tube (17) is horizontally provided on the electric furnace (1), and one end of the ceramic tube (17) is closed and the other end is open; A guide bracket (6), wherein the guide bracket (6) is spaced apart from the open end of the ceramic tube (17); and A ceramic rod (3), one end of which is provided with a loading platform (2), and the other end of which passes through a guide bracket (6) and is connected to a driving mechanism; The driving mechanism drives the ceramic rod (3) and the loading platform (2) to be inserted into the ceramic tube (17).

2. The thermal shock resistance testing device for high-temperature oxidation-resistant coatings according to claim 1, characterized in that: The driving mechanism includes A support frame (10), wherein the support frame (10) is provided with a guide rail (18), and both ends of the guide rail (18) are provided with a lead screw bearing seat (13); A screw drive motor (9), wherein the screw drive motor (9) is mounted on a support frame (10); A lead screw (12), one end of the lead screw (12) is rotatably connected to a lead screw bearing seat (13), and the other end passes through another lead screw bearing seat (13) and is transmission-connected to a lead screw drive motor (9); A slider (11), one end of which is slidably sleeved on the guide rail (18), and the other end of which is threadedly connected to the lead screw (12); and A clamping member (7) is mounted on the slider (11) and is used to clamp the ceramic rod (3).

3. The thermal shock resistance testing device for high-temperature oxidation-resistant coatings according to claim 2, characterized in that: The clamping member (7) comprises Pillar (72); A first half hoop (71), the first half hoop (71) is mounted on a support (72), and a first connecting plate (711) is provided at both ends; A second half hoop (74), wherein both ends of the second half hoop (74) are provided with second connecting plates (741); and Bolts (73), the second half hoop (74) is buckled and covered on the first half hoop (71) to form a hoop, and the second connecting plates (741) on both ends are connected to the first connecting plate (711) through bolts (73).

4. The thermal shock resistance testing device for high-temperature oxidation-resistant coatings according to claim 2, characterized in that: It also includes a screw controller (8), which is electrically connected to the screw drive motor (9).

5. The thermal shock resistance testing device for high-temperature oxidation-resistant coatings according to claim 2, characterized in that: The electric furnace (1) is provided with a thermocouple (101), an electric furnace controller (102), an adjustment button (104) and a display screen (103); the thermocouple (101), the adjustment button (104) and the display screen (103) are all electrically connected to the electric furnace controller (102); and the thermocouple (101) is used to monitor the heating temperature of the electric furnace (1).

6. The thermal shock resistance testing device for high-temperature oxidation-resistant coatings according to claim 1, characterized in that: The guide bracket comprises a support rod (62) and a guide sleeve (61); the guide sleeve (61) is mounted on the support rod (62) and is used for sliding sleeve connection with the ceramic rod (3).

7. The thermal shock resistance testing device for high-temperature oxidation-resistant coatings according to claim 1, characterized in that: It also includes a plug (4), one end of the ceramic tube (17) is installed with the plug (4), and the plug (4) is used to seal the ceramic tube (17).

8. The thermal shock resistance testing device for high-temperature oxidation-resistant coatings according to claim 1, characterized in that: It also includes a heat insulating member (5), and the ceramic tube (17) is connected to the electric furnace (1) via the heat insulating member (5).

9. The thermal shock resistance testing device for high-temperature oxidation-resistant coatings according to any one of claims 1 to 8, characterized in that: The invention also comprises a container (15), the top of which is open and is installed below the ceramic rod (3) close to the ceramic tube (17) for containing cooling liquid.

10. The thermal shock resistance testing device for high-temperature oxidation-resistant coatings according to claim 9, characterized in that: It also includes a workbench (16), which is used to support and install the electric furnace (1), the guide bracket (6) and the driving mechanism.