Ultrahigh-temperature three-point bending deflection measuring device

Abstract

The utility model relates to the technical field of metal sample piece measurement, and discloses an ultrahigh-temperature three-point bending deflection measuring device which comprises an upper pressing rod, an upper pressing block is detachably installed at the bottom end of the upper pressing rod through a pin, a compression sample piece is fixedly connected to the bottom end of the upper pressing block, a lower pressing rod is arranged at the bottom end of the upper pressing block, and the compression sample piece is fixedly connected to the bottom end of the lower pressing rod. A lower pressing block is fixedly connected to the top end of the lower pressing rod, a compression cushion block is fixedly connected to the top end of the lower pressing block, a supporting body is fixedly connected to the bottom end of the lower pressing rod through a water-cooling expansion sleeve, a spiral sleeve is detachably installed on the outer wall of the supporting body through a pin, and an upper hanging ring is slidably connected to the inner wall of the supporting body. A displacement rotating ring is detachably mounted on the outer wall of the supporting body through a pin, and a pull-down ring is slidably connected to the inner wall of the supporting body. According to the utility model, during high-temperature measurement, the influence of the temperature on the measurement of the sensor can be reduced, so that the measurement error of the sensor is reduced, and the measurement accuracy is ensured.

Description

Technical Field

[0001] This utility model relates to the field of metal sample measurement technology, and in particular to an ultra-high temperature three-point bending deflection measuring device. Background Technology

[0002] Mechanical testing of metal samples under ultra-high temperature environments requires more precise deflection measurement technology. For example, components such as turbine blades of aircraft engines are subjected to extremely high temperatures during operation, reaching 1000-2000℃. These components need to maintain good mechanical properties, such as high strength and high toughness, under ultra-high temperature environments to resist complex loads such as centrifugal force and aerodynamic force.

[0003] A search revealed Chinese Patent Publication No. CN108344645B, which discloses a device and method for measuring deflection in high-temperature bending tests. The device includes a three- or four-point bending fixture inside an environmental chamber. The deflection of the test sample is transmitted to a displacement sensor outside the chamber via a measuring extension rod and a Z-shaped frame. The bending fixture comprises a first pressure rod assembly and a second pressure rod assembly capable of moving relative to the first pressure rod assembly, with the axes of the two assemblies coincident. The end of the first pressure rod assembly is equipped with a first pressure roller and a second pressure roller for supporting the test endpoint of the sample. The second pressure rod assembly is equipped with an upper pressure roller for applying pressure to the sample. This device eliminates reliance on an optical measurement system and avoids direct contact between the displacement sensor and high-temperature components when using it, effectively ensuring the accuracy and reliability of deflection measurement in high-temperature bending tests.

[0004] The aforementioned measuring device lacks a cooling separation between the measuring section and the high-temperature section of the sample, making it impossible to completely avoid the influence of the test temperature on the measurement. Furthermore, the deformation measuring section of the aforementioned device is completely exposed to the air, making it susceptible to interference from other environmental factors, and the adjustment method is relatively complex, which is not conducive to the conduct of the test. Therefore, an ultra-high temperature three-point bending deflection measuring device is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides an ultra-high temperature three-point bending deflection measuring device, which aims to improve the cooling method between the high temperature measuring device and the high temperature sample in the prior art, and is not easily affected by the ambient temperature, thus changing the accuracy of the measurement.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: an ultra-high temperature three-point bending deflection measuring device, comprising an upper pressure rod, an upper pressure block detachably mounted at the bottom end of the upper pressure rod via a pin, a compression sample fixedly connected to the bottom end of the upper pressure block, a lower pressure rod at the bottom end of the upper pressure block, a lower pressure block fixedly connected to the top end of the lower pressure rod, a compression pad fixedly connected to the top end of the lower pressure block, a support body fixedly connected to the bottom end of the lower pressure rod via a water-cooled expansion sleeve, a spiral sleeve detachably mounted on the outer wall of the support body via a pin, an upper hanging ring slidably connected to the inner wall of the support body, and the outer wall of the support body connected via a pin. A displacement rotating ring is detachably installed. A pull-down ring is slidably connected to the inner wall of the support body. A sensor is fixedly connected to the top of the pull-down ring. A sensor mounting base is detachably installed to the top of the sensor via a pin. A tension spring guide seat is threadedly connected to the top of the sensor mounting base. A tension spring is detachably installed to the bottom of the upper hanging ring via a pin. A guide shaft locking ring is detachably installed to the inner wall of the support body via a pin. A guide shaft is fixedly connected to the top of the guide shaft locking ring. The upper end of the guide shaft is inserted into the hole at the lower end of the water-cooled expansion sleeve. A left ceramic rod, a middle ceramic rod, and a right ceramic rod are respectively provided on the top of the tension spring guide seat.

[0007] As a further description of the above technical solution:

[0008] The top end of the water-cooled expansion sleeve is fixedly connected to the bottom end of the pressure rod, and the bottom end of the water-cooled expansion sleeve is fixedly connected to the top end of the support body.

[0009] As a further description of the above technical solution:

[0010] The inner walls of both the spiral sleeve and the displacement rotating ring are rotatably connected to the outer wall of the support.

[0011] As a further description of the above technical solution:

[0012] The guide seat moves up and down along the vertical direction of the guide shaft to prevent the left ceramic rod, right ceramic rod, and middle ceramic rod from rotating on the guide seat.

[0013] As a further description of the above technical solution:

[0014] The front end of the upper hanging ring contacts the inner wall of the support body, and the front end of the lower pull ring contacts the inner wall of the support body.

[0015] As a further description of the above technical solution:

[0016] One end of the tension spring is fixedly connected to the sensor mounting base, and the other end of the tension spring is fixedly connected to the upper hanging ring. The tension spring will pull the tension spring guide seat to move upward along the guide axis, so that the left ceramic rod and right ceramic rod floating above the tension spring guide seat are in tight contact with the upper pressure block, and the middle ceramic rod is in tight contact with the compression pad.

[0017] This utility model has the following beneficial effects:

[0018] 1. In this utility model, through the cooperation between the water-cooled expansion sleeve and its sensor and other structures, the influence of temperature on sensor measurement can be reduced during high-temperature measurement, thereby reducing sensor measurement error and ensuring measurement accuracy.

[0019] 2. In this utility model, by setting up the cooperation between the spiral sleeve and its displacement rotating ring, the relative positional relationship between the ceramic rod, the sensor, and the sample can be appropriately adjusted. When the sample undergoes a certain deformation under the drive of external force, the three ceramic rods are tightly attached to the sample under the tension of the tension spring, making the measurement results more accurate. The operation of the deflection measuring device is simple and convenient. Attached Figure Description

[0020] Figure 1 This is a planar schematic diagram of an ultra-high temperature three-point bending deflection measuring device proposed in this utility model;

[0021] Figure 2 This is an enlarged structural diagram of point A of the ultra-high temperature three-point bending deflection measuring device proposed in this utility model;

[0022] Figure 3 This is a cross-sectional schematic diagram of the water-cooled expansion sleeve and its support body for an ultra-high temperature three-point bending deflection measuring device proposed in this utility model.

[0023] Legend:

[0024] 1. Upper pressure rod; 2. Upper pressure block; 3. Lower pressure block; 4. Lower pressure rod; 5. Water-cooled expansion sleeve; 6. Spiral sleeve; 7. Support body; 8. Displacement rotation ring; 9. Compression sample; 10. Pin; 11. Compression pad; 12. Three-point bend pressure head; 13. Three-point bend sample; 14. Three-point bend base; 15. Left ceramic rod; 16. Middle ceramic rod; 17. Right ceramic rod; 18. Upper hanging ring; 19. Tension spring; 20. Tension spring guide seat; 21. Sensor mounting seat; 22. Sensor; 23. Guide shaft; 24. Guide shaft locking ring; 25. Pull-down ring. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Example 1;

[0027] Reference Figures 1-3This utility model provides an embodiment of a three-point bending deflection measuring device for ultra-high temperature, comprising an upper pressure rod 1, an upper pressure block 2 detachably mounted at the bottom end of the upper pressure rod 1 via a pin 10, a compression sample 9 fixedly connected to the bottom end of the upper pressure block 2, and the upper pressure block 2, the compression sample 9, and the compression pad forming a test block. During measurement, the upper pressure block 2 can be mounted at the bottom end of the upper pressure rod 1 via the pin 10. A lower pressure rod 4 is provided at the bottom end of the upper pressure block 2, a lower pressure block 3 is fixedly connected to the top end of the lower pressure rod 4, and a compression pad 11 is fixedly connected to the top end of the lower pressure block 3. The compression pad 11 provides support for the test piece, thereby facilitating the measurement. The body is tested. The bottom end of the lower pressure rod 4 is fixedly connected to the support body 7 via a water-cooled expansion sleeve 5. The water-cooled expansion sleeve 5 provides a certain degree of protection, thereby reducing the surrounding temperature. A spiral sleeve 6 is detachably installed on the outer wall of the support body 7 via a pin 10. The front end of the spiral sleeve 6 has an inclined groove. An upper hanging ring 18 is connected to the inner wall of the support body 7. The upper hanging ring 18 can be adjusted by sliding. The outer wall of the support body 7 has a corresponding sliding groove, so that the upper hanging ring 18 can only move vertically. A displacement rotating ring 8 is detachably installed on the outer wall of the support body 7 via a pin 10. The front end of the displacement rotating ring 8 has an inclined groove. A pull-down ring 25 is slidably connected to the inner wall of support 7. A sensor 22 is fixedly connected to the top of the pull-down ring 25. The sensor 22 can be adjusted by sliding the pull-down ring 25. A sensor mounting base 21 is detachably mounted on the top of the sensor 22 via a pin 10. A tension spring guide seat 20 is threadedly connected to the top of the sensor mounting base 21. A tension spring 19 is detachably mounted on the bottom of the upper hanging ring 18 via a pin 10. The tension spring 19 can be used to tighten and straighten the ring. A guide shaft locking ring 24 is detachably mounted on the inner wall of support 7 via a pin 10. The guide shaft locking ring 24 can be fixed in place. The top of the guide shaft locking ring 24... A guide shaft 23 is fixedly connected to the end. The upper end of the guide shaft 23 is inserted into the inner hole at the lower end of the water-cooled expansion sleeve 5. The guide shaft 23 can play a guiding role. The top of the tension spring guide seat 20 is respectively provided with a left ceramic rod 15, a middle ceramic rod 16 and a right ceramic rod 17. The upper hanging ring 18, tension spring 19, tension spring guide seat 20, sensor mounting seat 21, sensor 22, guide shaft 23, guide shaft locking ring 24 and pull ring 25 constitute a deflection measuring device. When the lower pressure rod 4 applies a load to the pressure block, the left ceramic rod 15, the middle ceramic rod 16 and the right ceramic rod 17 on the deflection measuring device will simultaneously produce relative displacement changes, thereby realizing the acquisition of deformation.

[0028] Reference Figures 1-3The top end of the water-cooled expansion sleeve 5 is fixedly connected to the bottom end of the lower pressure rod 4, and the bottom end of the water-cooled expansion sleeve 5 is fixedly connected to the top end of the support body 7. The water-cooled expansion sleeve 5 provides heat insulation for the sensor 22. The inner walls of the spiral sleeve 6 and the displacement rotating ring 8 are rotatably connected to the outer wall of the support body 7. Through rotation, the inclined grooves in the spiral sleeve 6 and the displacement rotating ring 8 are displaced, and the guide seat 20 moves up and down along the vertical direction of the guide shaft 23 to prevent the left ceramic rod 15, right ceramic rod 17, and middle ceramic rod 16 from being in the guide direction. The upper ring 18 is rotated on the seat 20, and the front end of the upper ring 18 contacts the inner wall of the support body 7. The front end of the lower ring 25 contacts the inner wall of the support body 7. One end of the tension spring 19 is fixedly connected to the sensor mounting seat 21, and the other end of the tension spring 19 is fixedly connected to the upper ring 18. The tension spring 19 will pull the tension spring guide seat 21 to move upward along the guide shaft 23, so that the left ceramic rod 15 and the right ceramic rod 17 floating above the tension spring guide seat 20 are in tight contact with the upper pressure block 2, and the middle ceramic rod 16 is in tight contact with the compression pad 11.

[0029] Example 2;

[0030] The difference between Embodiment 2 and Embodiment 1 is that in Embodiment 2, the upper pressure block 2 is replaced by a three-point bending pressure head 12, the compression sample 9 is replaced by a three-point bending sample 13, and the lower pressure block 3 is replaced by a three-point bending base 14.

[0031] The bottom end of the upper pressure rod 1 is detachably mounted with a three-point bending pressure head 12 via a pin 10. The bottom end of the three-point bending pressure head 12 is fixedly connected to a three-point bending sample 13. The bottom end of the three-point bending sample 13 is fixedly connected to a three-point bending base 14. By disassembling and setting, different samples can be tested. The compression sample 9 is a square test piece, and the three-point bending sample 13 is a long rod-shaped test piece.

[0032] Working principle: Most of the content is the same as in Example 1, the difference is that 12, 13, and 14 need to be replaced, but the principle of measuring deformation remains the same. However, when measuring the deflection of the three-point bending sample, the deformation can be measured with just one middle ceramic rod, while the compression sample 9 requires the use of the left ceramic rod 15, the middle ceramic rod 16, and the right ceramic rod 17.

[0033] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A high-temperature three-point bending deflection measuring device, comprising an upper pressure rod (1), characterized in that: The bottom end of the upper pressure rod (1) is detachably mounted with an upper pressure block (2) via a pin (10). The bottom end of the upper pressure block (2) is fixedly connected with a compression sample (9). The bottom end of the upper pressure block (2) is provided with a lower pressure rod (4). The top end of the lower pressure rod (4) is fixedly connected with a lower pressure block (3). The top end of the lower pressure block (3) is fixedly connected with a compression pad (11). The bottom end of the lower pressure rod (4) is fixedly connected with a support body (7) via a water-cooled expansion sleeve (5). The outer wall of the support body (7) is detachably mounted with a spiral sleeve (6) via a pin (10). The inner wall of the support body (7) is slidably connected with an upper hanging ring (18). The outer wall of the support body (7) is detachably mounted with a displacement rotating ring (8) via a pin (10). The inner wall of the support body (7) is slidably connected with a lower pull ring (18). 25), the top of the pull ring (25) is fixedly connected to a sensor (22), the top of the sensor (22) is detachably mounted with a sensor mounting base (21) by a pin (10), the top of the sensor mounting base (21) is threadedly connected to a tension spring guide seat (20), the bottom of the upper hanging ring (18) is detachably mounted with a tension spring (19) by a pin (10), the inner wall of the support body (7) is detachably mounted with a guide shaft locking ring (24) by a pin (10), the top of the guide shaft locking ring (24) is fixedly connected to a guide shaft (23), the upper end of the guide shaft (23) is inserted into the hole at the lower end of the water-cooled expansion sleeve (5), and the top of the tension spring guide seat (20) is respectively provided with a left ceramic rod (15), a middle ceramic rod (16) and a right ceramic rod (17).

2. The ultra-high temperature three-point bending deflection measuring device according to claim 1, characterized in that: The top end of the water-cooled expansion sleeve (5) is fixedly connected to the bottom end of the pressure rod (4), and the bottom end of the water-cooled expansion sleeve (5) is fixedly connected to the top end of the support body (7).

3. The ultra-high temperature three-point bending deflection measuring device according to claim 1, characterized in that: The inner walls of the spiral sleeve (6) and the displacement rotating ring (8) are rotatably connected to the outer wall of the support (7).

4. The ultra-high temperature three-point bending deflection measuring device according to claim 1, characterized in that: The guide seat (20) moves up and down along the vertical direction of the guide shaft (23) to prevent the left ceramic rod (15), right ceramic rod (17), and middle ceramic rod (16) from rotating on the guide seat (20).

5. The ultra-high temperature three-point bending deflection measuring device according to claim 1, characterized in that: The front end of the upper hanging ring (18) contacts the inner wall of the support body (7), and the front end of the lower pull ring (25) contacts the inner wall of the support body (7).

6. The ultra-high temperature three-point bending deflection measuring device according to claim 1, characterized in that: One end of the tension spring (19) is fixedly connected to the sensor mounting base (21), and the other end of the tension spring (19) is fixedly connected to the upper hanging ring (18). The tension spring (19) will pull the tension spring guide seat to move upward along the guide shaft (23), so that the left ceramic rod (15) and right ceramic rod (17) floating above the tension spring guide seat (20) are in close contact with the upper pressure block (2), and the middle ceramic rod (16) is in close contact with the compression pad (11).

Images