Clamping and fixing device for testing performance of thermal barrier coating in hydrogen combustion environment
By designing a clamping method and external support structure that complements the V-shaped projection and groove in a hydrogen-burning environment, the problem of unstable clamping in an existing device in a hydrogen-burning environment is solved, and high-precision coating performance testing is achieved.
Patent Information
- Application Number
- CN202510603470.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-12
- Publication Date
- 2025-08-05
AI Technical Summary
The existing thermal barrier coating testing devices are difficult to adapt to high corrosion, high temperature and dynamic changes in hydrogen combustion environments, resulting in fixture failure and unstable clamping, which affects the testing accuracy and coating failure mechanism.
A clamping fixing device is designed, including a clamping module and a fixing assembly. It adopts a clamping method that complements the V-shaped projection and groove, combined with the external support of the clamp and the base, to ensure that the sample is stably clamped in a hydrogen-burning environment, avoid external factors affecting the coating, and improve clamping stability and testing accuracy.
It realizes that the surface of the sample coating is fully exposed to the influence of hydrogen combustion factors in a hydrogen combustion environment, reduces external extrusion pressure, improves the test accuracy and clamping stability, and supports in-depth research on the coating failure mechanism.
Smart Images
Figure CN120422155A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the technical field of thermal barrier coating performance testing, and in particular to a clamping and fixing device for thermal barrier coating performance testing in a hydrogen combustion environment. Background Art
[0002] Thermal barrier coatings (TBCs), as a key high-temperature protection technology, are widely used in aircraft engines and gas turbines in hydrogen combustion environments. The complex characteristics of hydrogen combustion environments, such as high temperature, high pressure, and water vapor corrosion, place higher demands on coating performance.
[0003] However, existing testing equipment is mostly designed for traditional combustion environments. In hydrogen combustion environments, these devices struggle to adapt to the highly corrosive, high-temperature, and dynamic demands of these environments. Fixture failure is common during testing, leading to unstable specimen gripping and even the risk of specimen dislodgement. This not only reduces test accuracy but also limits in-depth research into coating failure mechanisms. Summary of the Invention
[0004] In order to overcome the shortcomings mentioned in the above background technology, the present application provides a clamping fixture for performance testing of thermal barrier coatings in a hydrogen combustion environment.
[0005] A clamping and fixing device for testing the performance of thermal barrier coatings in a hydrogen combustion environment, comprising a clamping module, a fixing assembly and a base, wherein the clamping module is used to clamp a sample, and a groove is provided on the sample, and the clamping module comprises a first clamp and a second clamp, the first clamp and the second clamp are arranged on the base, and the clamping surface of the first clamp and the clamping surface of the second clamp are both provided with protrusions corresponding to the groove of the sample for clamping the sample, the first clamp and the second clamp are located on both sides of the sample to clamp the sample, and the fixing assembly is installed on the base, and the fixing assembly provides external support for the first clamp and the second clamp.
[0006] As an embodiment, the protrusion on the first fixture, the protrusion on the second fixture, and the groove on the sample are all V-shaped, and the V-shaped protrusion is complementary to the V-shaped groove.
[0007] As an embodiment, the first clamp and the second clamp have the same structure and are symmetrically arranged.
[0008] As an embodiment, a protrusion is provided on a side of the first clamp facing the second clamp, the thickness of the protrusion is smaller than the thickness of the first clamp, and a slot corresponding to and complementary to the protrusion is provided on a side of the second clamp facing the first clamp.
[0009] In one embodiment, a shape formed by the clamping surface of the first clamp and the clamping surface of the second clamp is the same as a circumferential contour of the sample.
[0010] As one embodiment, the fixing assembly includes a symmetrically arranged clamp, which is installed on the base, and a first mounting hole is provided on the clamp. The symmetrically arranged clamp is connected through the first mounting hole and bolts to adapt to the clamping modules of different widths. The clamp is provided with a slot for accommodating the clamping module, and the slot width of the slot is equal to the thickness of the clamping module. The clamp clamps the clamping module through the slot.
[0011] As one embodiment, the clamp is provided with a waist-shaped hole, which faces the base. The base is provided with a second mounting hole corresponding to the waist-shaped hole. A bolt is provided between the waist-shaped hole and the corresponding second mounting hole, so that the clamp is installed on the base by the bolt.
[0012] As an embodiment, the bottom of the clamp is provided with an anti-slip texture and a rubber gasket to improve the vibration resistance of the clamp.
[0013] As one embodiment, the base is provided with a fixing groove for accommodating the clamping module, the thickness of the clamping module is equal to the width of the fixing groove, the base is provided with a third mounting hole, and the base is mounted on the rotating platform through the third mounting hole and bolts.
[0014] As one embodiment, the fixing assembly is made of a high-temperature alloy material, and the clamping module and the fixing assembly are sprayed with a thermal barrier coating to improve the high-temperature resistance and corrosion resistance of the clamping module and the fixing assembly.
[0015] Beneficial effects of this application:
[0016] 1. In the present application, the protrusions on the clamping surface of the first clamp and the protrusions on the clamping surface of the second clamp correspond to the grooves of the sample respectively, so that the first clamp and the second clamp can stably clamp the sample. Compared with the existing clamping method, the clamping method in which the protrusions and the grooves correspond to each other in the present application can make the surface of the sample coated with the thermal barrier coating completely exposed to the hydrogen combustion environment. The first clamp and the second clamp will not block and contact the thermal barrier coating on the sample, so that the surface of the sample coated with the thermal barrier coating is not subject to the squeezing force of the first clamp and the second clamp, thereby avoiding the thermal barrier coating being affected by external factors such as external squeezing in the hydrogen combustion environment, ensuring that the factors that damage the thermal barrier coating are all factors within the hydrogen combustion environment, that is, reducing the variables affecting the test accuracy, which is conducive to improving the test accuracy; at the same time, the fixing component provides external support for the first clamp and the second clamp, further improving the clamping stability of the first clamp and the second clamp.
[0017] Other technical solutions of the present invention can also achieve the following technical effects:
[0018] 2. By setting the protrusion of the first clamp, the protrusion of the second clamp and the groove of the sample into a V shape, the sample can be automatically positioned and centered when the first clamp and the second clamp clamp the sample, thereby ensuring that the sample clamping position is stably centered.
[0019] 3. By respectively providing a protrusion and a slot on the first fixture and the second fixture, the first fixture can be inserted into the slot of the second fixture through the protrusion, thereby increasing the stability of the first fixture and the second fixture after clamping the workpiece.
[0020] 4. By setting a slot on the clamp, the first clamp and the second clamp can be respectively clamped in the corresponding slot, so that the slot limits the movement of the first clamp and the second clamp, and the symmetrical clamps are connected through the first mounting hole and the bolt to keep the clamp fixed. The clamp provides external support to the first clamp and the second clamp, thereby ensuring that the first clamp and the second clamp can stably clamp the specimen.
[0021] 5. By setting a fixing groove on the base, the width of the fixing groove is equal to the thickness of the clamping module, so that the clamping module can enter the fixing groove and be restricted, thereby limiting the movement of the clamping module during the clamping process and ensuring clamping stability.
[0022] 6. By spraying thermal barrier coating on the clamping module and the fixing assembly, the clamping module and the fixing assembly can maintain high strength and corrosion resistance in a hydrogen combustion environment, ensuring that the clamping module and the fixing assembly can work stably for a long time.
[0023] 7. The first fixture, second fixture, clamp and base are available in various models. When using specimens of different shapes and sizes, different parts can be selected to ensure stable clamping of the specimens. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 Schematic diagram of the three-dimensional structure of the clamping and fixing device in the embodiment of the present invention in the use state;
[0025] Figure 2 Schematic diagram of the three-dimensional structure of the first clamp and the second clamp in an embodiment of the present invention;
[0026] Figure 3 Schematic diagram of the three-dimensional structure of the protrusions and grooves in an embodiment of the present invention;
[0027] Figure 4 Schematic diagram of the positional relationship between the base and the second mounting hole in an embodiment of the present invention;
[0028] Figure 5Schematic diagram of the three-dimensional structure of the clamp in an embodiment of the present invention;
[0029] Figure 6 It is a cross-sectional view of the three-dimensional structure of the base in an embodiment of the present invention.
[0030] In the accompanying drawings: 1. Clamping module, 101. First clamp, 1011. Bump, 102. Second clamp, 1021. Slot, 2. Sample, 3. Fixing assembly, 301. Clamp, 302. First mounting hole, 303. Slot, 304. Waist-shaped hole, 4. Base, 401. Second mounting hole, 402. Fixing slot, 403. Third mounting hole. DETAILED DESCRIPTION
[0031] The following description is merely a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.
[0032] A clamping device for testing the performance of thermal barrier coatings in a hydrogen combustion environment, such as Figure 1-Figure 3 As shown, the clamping module 1 includes a clamping module 1, a fixing assembly 3, and a base 4. The clamping module 1 is used to clamp the specimen 2. The circumferential side of the specimen 2 is provided with a groove. The clamping module 1 includes two metal blocks, a first clamp 101 and a second clamp 102. The first clamp 101 and the second clamp 102 are provided on the base 4. The clamping surfaces of the first clamp 101 and the second clamp 102 are both provided with protrusions corresponding to the grooves on the specimen 2. The protrusions of the first clamp 101 and the second clamp 102 are used to clamp the specimen 2 and are complementary to the protrusions of the grooves of the specimen 2. The first clamp 101 and the second clamp 102 are located on either side of the specimen 2 to clamp the specimen 2. The first clamp 101 and the second clamp 102 can be selected from different models and specifications according to the different specimens 2. For example, different shapes of specimens 2 require the selection of first clamps 101 and second clamps 102 with corresponding clamping surface shapes. Different widths and depths of the grooves on the specimen 2 require the selection of different first clamps 101 and second clamps 102 so that the protrusions can always correspond to the grooves. The fixing assembly 3 is mounted on the base 4 , and the fixing assembly 3 provides external support for the first clamp 101 and the second clamp 102 , further ensuring the clamping stability of the first clamp 101 and the second clamp 102 .
[0033] When testing the performance of a thermal barrier coating in a hydrogen combustion environment, a sample 2 sprayed with the thermal barrier coating is clamped by a clamping module 1, such that the clamping surfaces of the first clamp 101 and the second clamp 102 sandwich the sample 2. At this point, the protrusions of the first clamp 101 and the second clamp 102 both embed into the grooves on the circumferential side of the sample 2, thereby improving the clamping effect on the sample 2 and ensuring the stability of the sample 2 when clamped. Furthermore, the first clamp 101 and the second clamp 102 clamp the sample 2 from the circumferential side, so that the surface of the sample 2 coated with the thermal barrier coating does not contact the first clamp 101 and the second clamp 102. This protects the thermal barrier coating of the sample 2 from obstruction and compression, allowing the thermal barrier coating to be affected only by factors within the hydrogen combustion environment and preventing the thermal barrier coating from being affected by compression forces outside the hydrogen combustion environment. This reduces variables that affect test accuracy, facilitates accurate judgment of changes in the thermal barrier coating in the hydrogen combustion environment, and thus improves test accuracy. After the first clamp 101 and the second clamp 102 clamp the sample 2, the first clamp 101 and the second clamp 102 are installed on the base 4, and then the fixing component 3 is installed on the base 4, so that the fixing component 3 provides external support for the first clamp 101 and the second clamp 102 to further ensure the stability of the sample 2 during testing.
[0034] In one embodiment, Figure 3 As shown, the protrusion on the first clamp 101, the protrusion on the second clamp 102, and the groove on the specimen 2 are all V-shaped. The V-shaped protrusion complements the V-shaped groove and is located on the upper portion of the first clamp 101 and the second clamp 102. The V-shaped protrusion is embedded in the V-shaped groove to keep the specimen 2 stable during the clamping process. At the same time, the V-shaped protrusion and the groove can automatically center the specimen 2 when they cooperate, ensuring that the specimen 2 is in a fixed clamping position.
[0035] In one embodiment, Figure 2 and Figure 3 As shown, a protrusion 1011 is provided on the side of the first clamp 101 facing the second clamp 102. There are two protrusions 1011 of different sizes. The two protrusions 1011 are respectively located at the top and bottom of the first clamp 101. The thickness of the protrusion 1011 is less than the thickness of the first clamp 101. A slot 1021 corresponding to and complementary to the protrusion 1011 is provided on the side of the second clamp 102 facing the first clamp 101. There are two slots 1021, which are respectively located at the top and bottom of the second clamp 102. The two second clamps 102 are complementary to the corresponding protrusions 1011.
[0036] When the first clamp 101 and the second clamp 102 are aligned and close to each other to prepare to clamp the sample 2, the protrusion 1011 on the first clamp 101 enters the corresponding slot 1021 of the second clamp 102, thereby splicing the first clamp 101 and the second clamp 102 together, so that the first clamp 101 and the second clamp 102 restrict each other, avoiding one of the clamps from being misaligned during the test process, and further ensuring the clamping stability.
[0037] In one embodiment, the first clamp 101 and the second clamp 102 have the same structure and are symmetrically arranged. In this embodiment, the first clamp 101 and the second clamp 102 no longer have the protrusion 1011 and the slot 1021 respectively. When clamping the sample 2, the opposite sides of the first clamp 101 and the second clamp 102 are tightly fitted.
[0038] In one embodiment, the shape formed by the clamping surface of the first clamp 101 and the clamping surface of the second clamp 102 is the same as the circumferential contour of the sample 2. When the first clamp 101 and the second clamp 102 are clamped, the clamping surfaces of the two surround and fit on the circumferential side of the sample 2. When the cross-section of the sample 2 is circular, the clamping surface of the first clamp 101 and the clamping surface of the second clamp 102 can be spliced into a circle with the same cross-section as the sample 2. The same applies to other shapes.
[0039] In one embodiment, Figure 4 and Figure 5 As shown, the fixing assembly 3 includes two symmetrically arranged clamps 301, which are mounted on the base 4. The clamps 301 are symmetrically provided with first mounting holes 302. The two clamps 301 are connected by bolts through the first mounting holes 302. The clamps 301 are provided with a slot 303 for accommodating the clamping module 1. The slot 303 has a width equal to the thickness of the clamping module 1, and the clamps 301 secure the clamping module 1 through the slot 303. When using clamping modules 1 of different thicknesses, the corresponding clamp 301 model can be replaced, and the size of the slot 303 of the clamp 301 can be changed to ensure that the clamping module 1 is always retained in the slot 303. If only the width of the clamping module 1 is changed, only the distance between the two clamps 301 needs to be adjusted to accommodate clamping modules 1 of different widths.
[0040] When using the fixing component 3 to further fix the clamping module 1, align the slots 303 of the two clamps 301 with the first clamp 101 and the second clamp 102 respectively, so that the first clamp 101 and the second clamp 102 are respectively inserted into the corresponding slots 303. When the back sides of the first clamp 101 and the second clamp 102 are both in contact with the corresponding clamps 301, pass the bolts through the first mounting holes 302 of the two clamps 301 in turn, and fix the two clamps 301 with the bolts.
[0041] In one embodiment, Figure 4 and Figure 5 As shown, waist-shaped holes 304 are symmetrically provided at the bottom of the clamp 301, and the waist-shaped holes 304 face the base 4. Second mounting holes 401 corresponding to the waist-shaped holes 304 are symmetrically provided on the base 4. Bolts are provided between the waist-shaped holes 304 and the corresponding second mounting holes 401, so that the clamp 301 is installed on the base 4 by bolts.
[0042] Make the bottom surfaces of the two clamps 301 fit with the top surface of the base 4, make the waist-shaped holes 304 of the clamps 301 connected with the corresponding second mounting holes 401, use bolts to pass through the waist-shaped holes 304 and the corresponding second mounting holes 401 in sequence, and use the bolts to tighten the clamps 301 on the base 4 to ensure the stability of the clamps 301.
[0043] In one embodiment, the bottom of the clamp 301 is provided with an anti-slip texture and a rubber gasket. The anti-slip texture and the rubber gasket can increase the friction between the bottom of the clamp 301 and the base 4, improve the stability of the clamp 301 when subjected to vibration, and improve the vibration resistance of the clamp 301.
[0044] In one embodiment, Figure 6 As shown, a fixing groove 402 for accommodating the clamping module 1 is provided in the middle of the top surface of the base 4. The thickness of the clamping module 1 is equal to the width of the fixing groove 402. The first clamp 101 and the second clamp 102 are inserted into the fixing groove 402. The base 4 is provided with a third mounting hole 403, and the base 4 is mounted to the rotating platform via bolts and the third mounting hole 403. When using first clamps 101 and second clamps 102 of different thicknesses, the corresponding model of base 4 can be selected simultaneously, so that the width of the fixing groove 402 on the base 4 is equal to the thickness of the first clamp 101 and second clamp 102.
[0045] When installing the first fixture 101 and the second fixture 102 on the base 4, the bottoms of the first fixture 101 and the second fixture 102 are inserted into the fixing groove 402. The fixing groove 402 limits the position of the first fixture 101 and the second fixture 102, thereby ensuring the stability of the bottom ends of the first fixture 101 and the second fixture 102. The third mounting hole 403 at the bottom of the base 4 is fixed to the rotating platform via bolts. The rotating platform can drive the entire device to rotate via the bolts, ensuring comprehensive and uniform testing of the sample 2 in the hydrogen combustion environment.
[0046] In one embodiment, the fixing component 3 is made of a high-temperature alloy material, such as Inconel 718 or GH4169, both of which are nickel-based alloys. The clamping module 1 and the fixing component 3 are sprayed with a thermal barrier coating to achieve high strength and corrosion resistance in an environment up to 1400°C, ensuring that the clamping module 1 and the fixing component 3 can work stably for a long time.
[0047] It should be understood that this embodiment is only used to illustrate the present invention and is not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall equally within the scope limited by the appended claims of the application.
Claims
1. A clamping device for testing the performance of thermal barrier coatings in a hydrogen combustion environment, characterized in that: The invention comprises a clamping module (1), a fixing assembly (3) and a base (4), wherein the clamping module (1) is used for clamping a sample (2), and a groove is provided on the sample (2). The clamping module (1) comprises a first clamp (101) and a second clamp (102), and the first clamp (101) and the second clamp (102) are provided on the base (4). The clamping surface of the first clamp (101) and the clamping surface of the second clamp (102) are both provided with protrusions corresponding to the groove of the sample (2) for clamping the sample (2). The first clamp (101) and the second clamp (102) are located on both sides of the sample (2) to clamp the sample (2). The fixing assembly (3) is installed on the base (4), and the fixing assembly (3) provides external support for the first clamp (101) and the second clamp (102).
2. The clamping and fixing device for performance testing of thermal barrier coatings in a hydrogen combustion environment according to claim 1, characterized in that: The protrusion on the first clamp (101), the protrusion on the second clamp (102), and the groove on the sample (2) are all V-shaped, and the V-shaped protrusion is complementary to the V-shaped groove.
3. The clamping and fixing device for performance testing of thermal barrier coatings in a hydrogen combustion environment according to claim 1, characterized in that: The first clamp (101) and the second clamp (102) have the same structure and are symmetrically arranged.
4. The clamping and fixing device for performance testing of thermal barrier coatings in a hydrogen combustion environment according to claim 1, characterized in that: A protrusion (1011) is provided on a side of the first clamp (101) facing the second clamp (102), and the thickness of the protrusion (1011) is less than the thickness of the first clamp (101); and a slot (1021) corresponding to and complementary to the protrusion (1011) is provided on a side of the second clamp (102) facing the first clamp (101).
5. The clamping and fixing device for performance testing of thermal barrier coatings in a hydrogen combustion environment according to claim 1, characterized in that: The shape formed by the clamping surface of the first clamp (101) and the clamping surface of the second clamp (102) is the same as the circumferential contour of the sample (2).
6. The clamping and fixing device for performance testing of thermal barrier coatings in a hydrogen combustion environment according to claim 1, characterized in that: The fixing assembly (3) comprises a symmetrically arranged clamp (301), the clamp (301) being mounted on the base (4), the clamp (301) being provided with a first mounting hole (302), the symmetrically arranged clamp (301) being connected with a bolt via the first mounting hole (302) to accommodate the clamping modules (1) of different widths, the clamp (301) being provided with a slot (303) for accommodating the clamping module (1), the slot width of the slot (303) being equal to the thickness of the clamping module (1), and the clamp (301) clamping the clamping module (1) via the slot (303).
7. The clamping and fixing device for performance testing of thermal barrier coatings in a hydrogen combustion environment according to claim 6, characterized in that: The clamp (301) is provided with a waist-shaped hole (304), the waist-shaped hole (304) faces the base (4), the base (4) is provided with a second mounting hole (401) corresponding to the waist-shaped hole (304), and a bolt is provided between the waist-shaped hole (304) and the corresponding second mounting hole (401), so that the clamp (301) is mounted on the base (4) by the bolt.
8. The clamping and fixing device for performance testing of thermal barrier coatings in a hydrogen combustion environment according to claim 6, characterized in that: The bottom of the clamp (301) is provided with anti-slip texture and a rubber gasket, which are used to improve the anti-vibration performance of the clamp (301).
9. The clamping and fixing device for performance testing of thermal barrier coatings in a hydrogen combustion environment according to claim 1, characterized in that: The base (4) is provided with a fixing groove (402) for accommodating the clamping module (1); the thickness of the clamping module (1) is equal to the groove width of the fixing groove (402); the base (4) is provided with a third mounting hole (403); the base (4) is mounted on the rotating platform via the third mounting hole (403) and bolts.
10. The clamping and fixing device for performance testing of thermal barrier coatings in a hydrogen combustion environment according to claim 1, characterized in that: The fixing assembly (3) is made of a high-temperature alloy material, and the clamping module (1) and the fixing assembly (3) are sprayed with a thermal barrier coating to improve the high-temperature resistance and corrosion resistance of the clamping module (1) and the fixing assembly (3).