A thermal fatigue test device and a test method comprising the same

Abstract

The application discloses a thermal fatigue test device and a test method comprising the same, which comprises a burner, a tool clamp, a first chain wheel and a second chain wheel, wherein the first chain wheel and the second chain wheel are arranged along the flame direction of the burner; the diameter of the first chain wheel is less than or equal to the width of the burner flame at the first chain wheel; the diameter of the second chain wheel is less than or equal to the width of the burner flame at the second chain wheel; a roller chain is arranged on the first chain wheel and the second chain wheel and is in meshing connection with the chain wheel gear teeth; and the tool clamp is installed on the roller chain. Through reasonable design of the chain wheel size and the chain pitch, full coverage of the flame can be realized, and the design of the chain transmission meets the requirement of simultaneously clamping multiple samples, thereby solving the problem of the limited number of clamped samples of the small-size rotary disc type device.

Description

Technical Field

[0001] This invention belongs to the field of aero-engines, and particularly relates to a thermal fatigue testing device and a testing method comprising the same. Background Technology

[0002] Chinese patent document CN106383143A discloses "a rotary thermal barrier coating thermal fatigue testing device", such as Figure 1 As shown, the device includes a support platform 1, a sample mounting base 2, a sample clamp 3, a planetary gear mechanism 4, a clearance adjustment mechanism 5, a sample 6, a drive motor 7, a universal joint 8, an air intake pipe 9, and a smoke baffle 10. The sample mounting base 2 is mounted on the support platform 1 and includes a rotating support disk and a base. The rotating support disk has a rotating pair and is circumferentially connected and sealed to the base using a comb-tooth structure. The rotating support disk has sample mounting holes circumferentially, and the sample clamp 3 is installed in these holes for clamping the sample. The rotating support disk is driven to rotate by the drive motor 7, causing the sample to revolve. Simultaneously, the planetary gear mechanism 4 is sleeved at the bottom of the sample clamp, allowing the sample to rotate while revolving. This thermal fatigue testing device can study the thermal fatigue life of multiple samples under high-temperature combustion gases. The tested samples are in a uniform combustion gas environment, and the experimental data obtained are closer to actual engine operating conditions compared to those obtained by ordinary resistance wire heating.

[0003] However, the following problems exist when using the above-mentioned device for high-temperature gas environment durability testing: 1. Due to the limitation of the flame beam width of the outlet high-temperature gas, the actual gas flame cannot completely cover all samples on the turntable. If the flame beam width is smaller than the turntable diameter, the samples will inevitably leave the flame coverage area during the turntable's rotation, affecting the uniformity of the test environment. 2. If all samples are to be within the flame coverage area, the size of the turntable will be limited by the flame beam diameter, resulting in a limited number of samples that the turntable can hold, affecting test efficiency. These problems make it difficult for the turntable device to simultaneously meet the requirements of controllable test environment parameters and high-efficiency testing. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the defects in the prior art of high temperature gas environment durability test, where the sample cannot be fully covered by the flame, thus affecting the uniformity of the test environment, and although reducing the size of the turntable can make the sample fully covered by the flame, the number of samples that can be clamped on the turntable is limited, which affects the test efficiency. The present invention provides a thermal fatigue test device and a test method including the present invention.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] A thermal fatigue testing apparatus includes a burner and a tooling fixture. The apparatus further includes: a first sprocket and a second sprocket, the first sprocket and the second sprocket being respectively arranged along the flame direction of the burner; the diameter of the first sprocket is less than or equal to the width of the flame at the first sprocket; the diameter of the second sprocket is less than or equal to the width of the flame at the second sprocket; a roller chain, the roller chain being wound around the first sprocket and the second sprocket and meshing with the teeth of each sprocket; and the tooling fixture being mounted on the roller chain.

[0007] In this technical solution, the sample can be kept within the gas flame during the movement process, so that the sample is in a more stable test environment and more accurate test and analysis results can be obtained. Compared with the existing technology, the test effect is improved. The chain drive design can clamp more samples while ensuring that the sample is fully covered by the flame. Moreover, the chain structure is convenient for loading and unloading, which can improve test efficiency.

[0008] Preferably, the first sprocket is located on the side closer to the burner; the second sprocket is located on the side farther from the burner.

[0009] Preferably, the diameter of the first sprocket is smaller than the diameter of the second sprocket.

[0010] In this technical solution, since the diameter of the first sprocket is smaller than that of the second sprocket, it conforms to the conical shape formed by the flame, allowing the sample to be fully covered by the flame.

[0011] Preferably, the upper surface of the roller chain is provided with a fixing groove; the tooling fixture is installed in the fixing groove.

[0012] In this technical solution, the fixing grooves provided on the surface of the roller chain enable the tooling fixture to be firmly installed in them and not easily slip off.

[0013] Preferably, the tooling fixture includes an outer chain plate; a mounting groove for fixing the test sample; and a pin for connecting the chain links to each other.

[0014] This technical solution enables the test sample to be mounted, fixed, and synchronously transmitted on the roller chain. Preferably, the device further includes a drive unit; the drive unit includes a drive shaft; the first sprocket is connected to the drive shaft.

[0015] Preferably, the drive device further includes a driven shaft; the second sprocket is connected to the driven shaft.

[0016] In this technical solution, the drive device can ensure that the sprocket and roller chain can be synchronously transmitted and operate stably.

[0017] Preferably, the driving device is a motor.

[0018] In this technical solution, the motor has the advantages of being able to start and stop softly, having good braking characteristics, high reliability, good stability, strong adaptability, and simple maintenance and repair.

[0019] Preferably, the device further includes an infrared thermometer for recording the surface temperature of the sample in real time; the infrared thermometer is mounted on the burner.

[0020] This technical solution can monitor temperature changes during the assessment process.

[0021] The present invention also provides a thermal fatigue testing method, which uses the thermal fatigue testing apparatus as described above, and the thermal fatigue testing method specifically includes the following steps:

[0022] The tooling fixture is installed on the roller chain, and the sample is installed on the tooling fixture; the burner and the drive device are turned on so that the sample moves synchronously around the first sprocket and the second sprocket along the movement trajectory of the roller chain and is heated evenly.

[0023] The significant advantages of this invention are as follows: By designing a chain-driven transmission mechanism and its relative position to the flame, with a fixed outlet gas flame diameter, the test sample can be synchronously transmitted along the chain's trajectory within the conical area formed by the jet gas flame. This design ensures that the sample remains within the gas flame coverage area during movement, providing a more stable testing environment for more accurate test and analysis results, thus improving test effectiveness. The chain drive design, while ensuring full flame coverage, allows for the clamping of more samples, facilitating loading and unloading and improving testing efficiency. The device is also equipped with an infrared thermometer to record the sample surface temperature in real time to monitor temperature changes during the testing process. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of a rotary thermal barrier coating thermal fatigue testing device in the prior art.

[0025] Figure 2 This is a schematic diagram of the overall structure of the thermal fatigue testing device according to Embodiment 1 of the present invention;

[0026] Figure 3 This is an exploded view of the thermal fatigue testing apparatus of Embodiment 1 of the present invention;

[0027] Figure 4 This is a schematic cross-sectional view of the tooling fixture on the roller chain link according to Embodiment 1 of the present invention;

[0028] Figure 5This is a top view of the thermal fatigue testing apparatus of Embodiment 1 of the present invention.

[0029] Explanation of reference numerals in the attached figures:

[0030] Existing technology

[0031] Support Platform 1

[0032] Sample mounting base 2

[0033] Sample clamp 3

[0034] Star-planetary gear mechanism 4

[0035] Gap adjustment mechanism 5

[0036] Sample 6

[0037] Drive motor 7

[0038] Universal joint 8

[0039] Intake pipe 9

[0040] Smoke baffle 10

[0041] This invention

[0042] Sample 1

[0043] Roller chain 2

[0044] Tooling and Fixture 21

[0045] Mounting slot 211

[0046] Pin 22

[0047] External link plate 23

[0048] Base 3 containing motor and rotating bearing

[0049] First sprocket 31

[0050] Second sprocket 32

[0051] First pivot 311

[0052] Second pivot 321

[0053] Burner 4

[0054] Infrared thermometer 5 Detailed Implementation

[0055] The present invention will be further illustrated by way of embodiments below, but the present invention is not limited to the scope of the embodiments described herein.

[0056] Example 1

[0057] like Figures 2-5As shown, a thermal fatigue testing device includes a burner 4, a tooling fixture 21, a first sprocket 31, and a second sprocket 32. The first sprocket 31 and the second sprocket 32 ​​are arranged along the direction of the burner flame. The diameter of the first sprocket 31 is less than or equal to the width of the burner flame on the first sprocket 31. The diameter of the second sprocket 32 ​​is less than or equal to the width of the burner flame on the second sprocket 32. The device also includes a roller chain 2, which is wound around the first sprocket 31 and the second sprocket 32 ​​and meshes with the sprocket teeth. The roller chain 2 is provided with a fixing groove, and the tooling fixture 21 is installed in the fixing groove.

[0058] The first sprocket 31 is located on the side closer to the burner 4, and the second sprocket 32 ​​is located on the side farther from the burner 4, with the diameter of the first sprocket 31 being smaller than the diameter of the second sprocket 32. Because the diameter of the first sprocket is smaller than the diameter of the second sprocket, it conforms to the cone shape of the flame (corresponding to...). Figure 5 (The dashed lines) allow the sample to be fully covered by the flame.

[0059] It should be noted that the first and second sprockets are not related in any order. The first sprocket can be placed on the side away from the burner, while the second sprocket can be placed on the side closer to the burner. The diameter between the two sprockets is determined by the flame beam at the burner outlet, as long as the first and second sprockets can be fully covered by the flame.

[0060] In this technical solution, the sample can be kept within the gas flame during the movement process, so that the sample is in a more stable test environment and more accurate test and analysis results can be obtained. Compared with the existing technology, the test effect is improved. The chain drive design can clamp more samples while ensuring that the sample is fully covered by the flame. Moreover, the chain structure is convenient for loading and unloading, which can improve test efficiency.

[0061] The tooling fixture 21 includes an outer chain plate 23; a mounting groove 211 for fixing the test sample; and a pin 22 for connecting the chain links to each other.

[0062] The device also includes a base 3 containing a drive unit and a rotating bearing; the bearing includes a first rotating shaft 311 and a second rotating shaft 321; wherein the first rotating shaft is the drive shaft and the first sprocket 31 is mounted on the drive shaft; the second rotating shaft is the driven shaft and the second sprocket 32 ​​is mounted on the driven shaft.

[0063] The driving device is an electric motor. The motor outputs torque to the first sprocket 31, causing it to rotate. The power is then transmitted to the second sprocket 32 ​​via the roller chain 2, causing the second sprocket 32 ​​to rotate. The roller chain 2 also rotates stably along with the two sprockets. The electric motor used in this invention has the advantages of soft start and soft stop, good braking characteristics, high reliability, good stability, strong adaptability, and simple maintenance.

[0064] It should be noted that the driving method of this device is not limited to this. Alternatively, the motor outputs torque to the second sprocket 32 ​​to make it rotate, and the power is transmitted to the first sprocket 31 through the roller chain 2, causing the first sprocket 31 to rotate. The roller chain 2 will also stably transmit power as the two sprockets rotate, or the first and second sprockets can be driven simultaneously. As long as the effect of sprocket and chain transmission can be achieved, it is acceptable. In addition, the driving device is not limited to a motor; any device that can drive the chain is acceptable.

[0065] The device also includes an infrared thermometer 5, which is used to record the surface temperature of the sample in real time. The infrared thermometer 5 is mounted on the burner 4, enabling it to monitor temperature changes during the testing process.

[0066] Example 2

[0067] The present invention also provides a method comprising using a thermal fatigue testing apparatus of Embodiment 1, specifically comprising the following steps:

[0068] Mount the tooling fixture 21 onto the roller chain 2, and mount the sample onto the tooling fixture 21; turn on the burner 4 and the drive device so that the sample moves synchronously around the first sprocket 31 and the second sprocket 32 ​​along the movement trajectory of the roller chain and is heated evenly.

[0069] Prior to this step, the first sprocket 31 and the second sprocket 32 ​​are installed along the flame direction of the burner 4, and the roller chain 2 is wrapped around the first sprocket 31 and the second sprocket 32 ​​and meshes with the sprocket teeth.

[0070] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. A thermal fatigue testing apparatus, comprising a burner and tooling fixtures, characterized in that, The thermal fatigue testing apparatus also includes: A first sprocket and a second sprocket are respectively arranged along the flame direction of the burner. The first sprocket is located on the side closer to the burner, and the second sprocket is located on the side farther from the burner. The diameter of the first sprocket is smaller than the diameter of the second sprocket. Furthermore, the diameter of the first sprocket is less than or equal to the width of the flame of the burner at the first sprocket, and the diameter of the second sprocket is less than or equal to the width of the flame of the burner at the second sprocket. A roller chain, which is wound around the first sprocket and the second sprocket and meshes with the teeth of each sprocket; the tooling fixture is mounted on the roller chain.

2. The thermal fatigue testing apparatus as described in claim 1, characterized in that, The upper surface of the roller chain is provided with a fixing groove; the tooling fixture is installed in the fixing groove.

3. The thermal fatigue testing apparatus as described in claim 1, characterized in that, The tooling fixture includes an outer chain plate; a mounting groove for fixing the test sample; and pins for connecting the chain links to each other.

4. The thermal fatigue testing apparatus as described in claim 1 or 2, characterized in that, The device further includes a drive unit; the drive unit includes a drive shaft; the first sprocket is connected to the drive shaft.

5. The thermal fatigue testing apparatus as described in claim 4, characterized in that, The drive device further includes a driven shaft; the second sprocket is connected to the driven shaft.

6. The thermal fatigue testing apparatus as described in claim 4, characterized in that, The driving device is an electric motor.

7. The thermal fatigue testing apparatus as described in claim 1, characterized in that, It also includes an infrared thermometer, which is used to record the surface temperature of the sample in real time; the infrared thermometer is installed on the burner.

8. A method for thermal fatigue testing, characterized in that, It uses the thermal fatigue testing apparatus as described in any one of claims 1-7, and the thermal fatigue testing method specifically includes the following steps: The tooling fixture is installed on the roller chain, and the sample is installed on the tooling fixture; the burner is turned on and the drive device is used to make the sample move synchronously around the first sprocket and the second sprocket along the movement trajectory of the roller chain, and be heated evenly.

Images