A natural environment cumulative damage test and integration device for rubber material

Abstract

The application discloses a kind of rubber material natural environment cumulative damage test test integration device, including test black box, test black box is installed on solar tracking equipment, in-situ test monitoring system is provided in test black box, rubber sample is installed on in-situ test monitoring system, and rubber sample can move with test black box synchronously;The device is used to be arranged in polar environment or high-temperature environment with temperature not less than 100 DEG C.The rubber material natural environment cumulative damage test test integration device provided by the application can be used to enhance the solar radiation heat effect, day and night and seasonal temperature difference effect that rubber material is subjected to during in-situ test, can accelerate the aging of rubber material under natural environment, can simultaneously to its stable, smoothly carry out damage in-situ test while simulating the working condition factor that rubber material is subjected to.

Description

Technical Field

[0001] This invention belongs to the technical field of rubber material damage testing equipment, specifically relating to an integrated device for testing cumulative damage of rubber materials under natural environment. Background Technology

[0002] Some rubber materials used in polar or high-temperature (not lower than 100°C) environments require accelerated testing under harsh conditions. Currently, there is no accurate and efficient method for collecting experimental data under these conditions. Furthermore, existing technologies lack in-situ damage testing equipment capable of enhancing the effects of solar radiation heat, diurnal temperature variation, and seasonal temperature differences on rubber materials.

[0003] In addition to temperature, some rubber materials are also affected by working conditions such as pressure and rotation during actual use. How to conduct in-situ damage tests stably and smoothly while simulating the working conditions experienced by rubber materials is also a problem that needs to be solved. Summary of the Invention

[0004] In view of the technical problems mentioned in the background art, the purpose of this invention is to provide an integrated device for testing the cumulative damage of rubber materials in the natural environment.

[0005] The present invention adopts the following technical solution.

[0006] An integrated testing device for cumulative damage testing of rubber materials under natural environment includes a test black box, which is installed on a solar tracking device. An in-situ test monitoring system is set up inside the test black box. The rubber sample is installed on the in-situ test monitoring system and can move synchronously with the test black box. The device is used to be deployed in polar environments or high-temperature environments with temperatures not lower than 100°C.

[0007] Furthermore, a sample clamping part is provided inside the test black box and next to the in-situ test monitoring system. The sample clamping part is used to install plate-shaped or rod-shaped samples.

[0008] Furthermore, mounting holes are provided on the bottom wall of the test black box, and a cylindrical in-situ test monitoring system is inserted into the mounting holes. The rubber sample is located above the bottom wall of the test black box. This structure facilitates the quick loading and unloading of the in-situ test monitoring system, which is convenient not only for conducting in-situ tests on samples under enhanced working conditions, but also for conducting in-situ tests on samples under non-enhanced working conditions.

[0009] Furthermore, the test black box is rotatably connected to the frame of the solar tracking equipment at both ends. One end of the test black box is connected to a horizontally arranged power system, which is used to control the vertical rotation of the test black box. The frame is rotatably connected to the base of the solar tracking equipment in the horizontal direction, and the power system of the base is used to control the frame and the test black box to rotate synchronously in the horizontal direction.

[0010] Furthermore, the bottom wall of the test black box has a cavity, and the bottom walls of the test black box on both the left and right sides of the in-situ test monitoring system are provided with hollow areas. Fans are installed on the sides of the hollow areas, and the cavities above and below the bottom wall of the test black box and the hollow areas together form a circulating air duct.

[0011] Furthermore, the in-situ testing and monitoring system includes a rubber sample mounting section, which is located around the central area of ​​the top of the heat insulation shell. The rubber sample mounting section is connected to a rubber compression control mechanism located inside the heat insulation shell. A vision terminal is located in the central area of ​​the top of the heat insulation shell, inside a quartz glass cover, and is used to photograph the rubber sample. A heat insulation cylinder is installed inside the quartz glass cover, and the heat insulation cylinder is fitted onto the vision terminal mounting cylinder. A through-hole is radially provided on the heat insulation cylinder, and the lens of the vision terminal is located at the through-hole, allowing it to photograph the rubber sample through the through-hole. The rubber compression control mechanism employs a telescopic mechanism. A force sensor is installed on the telescopic rod of the telescopic mechanism, and a pressure plate is fixedly installed at the top of the telescopic rod. A fixed plate is installed directly above the pressure plate, and the hollow space between the pressure plate and the fixed plate is used to place the rubber sample. When the telescopic rod of the telescopic mechanism retracts, the height of the hollow space increases; when the telescopic rod of the telescopic mechanism extends, the height of the hollow space decreases.

[0012] Furthermore, the heat insulation shell is cylindrical, and four sets of rubber sample mounting parts are provided on the top of the heat insulation shell. Each set of rubber sample mounting parts is equipped with two spaced telescopic mechanisms. The telescopic rod of each telescopic mechanism is connected to a positioning plate through a linear bearing. Both the upper and lower ends of the positioning plate are provided with heat insulation layers. The heat insulation shell includes an outer shell, a heat insulation layer, and an inner shell arranged coaxially, with the heat insulation layer sandwiched between the outer shell and the inner shell. A cooling element is provided in the inner cavity of the inner shell. The electrical control part of the rubber compression control mechanism is located in the inner cavity of the inner shell.

[0013] The fixing plate is a prismatic plate, with a hollow space directly below the center of the prismatic plate, which faces the lens of the vision terminal. This design allows for more accurate, standardized, and clearer acquisition of the rubber sample's posture, and is particularly suitable for testing and monitoring round or rectangular rubber samples.

[0014] Furthermore, an annular groove for holding the rubber sealing ring is provided on the pressure plate, and the groove is located close to the through hole. The pressure plate is made of quartz glass. This design allows for the successful testing and monitoring of rubber sealing ring samples.

[0015] Beneficial Effects: The integrated device for cumulative damage testing of rubber materials under natural environment provided by this invention can enhance the effects of solar radiation heat, diurnal and seasonal temperature differences on rubber materials during in-situ testing, accelerating the aging of rubber materials in natural environments. It can stably and smoothly conduct in-situ damage testing while simulating the working conditions experienced by rubber materials. Using this invention, in-situ monitoring of stress relaxation levels under pressure on rubber samples is achieved, enabling online and real-time monitoring of sample stress relaxation levels in the test environment, ensuring the stability and continuity of monitoring data, and improving the authenticity and accuracy of monitoring results. The operation of this invention is simple and efficient, especially suitable for in-situ monitoring and detection in low-temperature or high-temperature environments. During the test, there is no need to remove the sample to measure relevant test data, enabling long-term in-situ monitoring of rubber samples under constant displacement or constant stress conditions. Using this invention, monitoring can be precisely controlled after the rubber sample (including rubber sealing ring samples) is compressed to any target thickness, and the corresponding target thickness error can be controlled within 0.01 mm. Attached Figure Description

[0016] Figure 1 , Figure 2 This is a schematic diagram of the external structure of the integrated device for testing the cumulative damage of rubber materials in the natural environment, as shown in the embodiment.

[0017] Figure 3 , Figure 4 This is a schematic diagram of the internal structure of the test black box of the integrated device for testing cumulative damage of rubber materials in natural environment in the embodiment;

[0018] Figure 5 A schematic diagram showing the installation section for three rubber samples during the trial departure process;

[0019] Figure 6 This is a schematic diagram of the external structure of the in-situ test monitoring system of the integrated device for testing cumulative damage to rubber materials in the natural environment (with six rubber sample mounting parts) in the embodiment.

[0020] Figure 7 This is a schematic cross-sectional view of the in-situ test monitoring system;

[0021] Figure 8 for Figure 7 Enlarged view of part B in the middle section (Application Scheme 1);

[0022] Figure 9 for Figure 7 Enlarged view of part B in the middle (Application Scheme 2). Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Example

[0024] Combination Figures 1 to 8 As shown, an integrated testing device for cumulative damage of rubber materials under natural environment includes a test black box 20, which is installed on a solar tracking device. An in-situ test monitoring system 21 is installed inside the test black box 20. Figure 3 and Figure 4 The diagram schematically illustrates six test monitoring systems 21. A rubber sample 2 is mounted on one of these systems and moves synchronously with the test black box 20. This device is designed for use in polar environments or high-temperature environments with temperatures not lower than 100°C. A sample clamping part 22 is located inside the test black box 20, beside the in-situ test monitoring system 21, for mounting plate-shaped or rod-shaped samples. Mounting holes are provided on the bottom wall of the test black box 20, into which the cylindrical in-situ test monitoring system 21 is inserted. The rubber sample 2 is positioned above the bottom wall of the test black box 20. The test black box 20 is rotatably connected at both ends to the frame 23 of the solar tracking equipment. One end of the test black box 20 is connected to a horizontally arranged power system, which controls the vertical rotation of the test black box 20. The frame 23 is rotatably connected horizontally to the base 24 of the solar tracking equipment, and the power system of the base 24 controls the synchronous horizontal rotation of the frame 23 and the test black box 20. The test black box 20 has a cavity at the bottom wall. The test black box 20 is located on the bottom wall of the test black box 20 on both sides of the in-situ test monitoring system 21. The sample clamping part 22 is located in the hollow area 26. A fan 25 is arranged on the side of the hollow area 26. The cavity above and below the bottom wall of the test black box 20 and the hollow area 26 together form a circulating air duct.

[0025] In this embodiment, the in-situ test monitoring system 21 includes a rubber sample mounting part 2. Figure 5 The diagram illustrates the installation of three rubber samples 2 (which allows for simultaneous testing of three samples). Figure 5The diagram schematically illustrates five rubber sample mounting sections 2 (capable of simultaneously testing five samples). These sections are located around the central area of ​​the top of the heat insulation housing 1 and are connected to a rubber compression control mechanism located within the heat insulation housing 1. A vision terminal is positioned in the central area of ​​the top of the heat insulation housing 1, housed within a quartz glass cover 4, and is used to photograph the rubber sample 16. A heat insulation cylinder 5 is located within the cavity of the quartz glass cover 4, and is fitted onto the vision terminal mounting cylinder 7. The heat insulation cylinder 5 and the quartz glass cover 4 are coaxially arranged. A through-hole 6 is radially provided on the heat insulation cylinder 5, and the lens of the vision terminal is located at the through-hole 6, allowing it to photograph the side wall of the rubber sample 16 through the through-hole 6. A light aperture is located on the vision terminal mounting cylinder 7 near the through-hole 6, and a supplementary light is installed at the light aperture to enable the vision terminal to photograph under standard lighting conditions.

[0026] In this embodiment, the rubber compression control mechanism adopts a telescopic mechanism, specifically an electric push rod or a screw lifting mechanism capable of controlling the stroke. When using a screw lifting mechanism, the lifting rod can be regarded as a telescopic rod. A force sensor 18 is set on the telescopic rod of the telescopic mechanism. A pressure plate 8 is fixedly set at the top of the telescopic rod, and a fixing plate 10 is set directly above the pressure plate 8. The fixing plate 10 is fixedly connected to the top surface of the outer shell 11 through a connecting rod. The hollow space between the pressure plate 8 and the fixing plate 10 is used to place the rubber sample 16. When the telescopic rod of the telescopic mechanism retracts, the height of the hollow space increases; when the telescopic rod of the telescopic mechanism extends, the height of the hollow space decreases. The heat insulation shell 1 is cylindrical, and four or five sets of rubber sample mounting parts 2 are set on the top of the heat insulation shell 1. Each set of rubber sample mounting parts 2 is equipped with two telescopic mechanisms arranged at intervals. The telescopic rod of each telescopic mechanism (or the lifting rod of the screw lifting mechanism) is connected to the pressure plate 8 through a linear bearing 17. A heat insulation layer 15 is set at the lower end of the pressure plate 8, and the heat insulation layer 15 is integrally formed with the heat insulation cylinder 5. In this embodiment, the heat insulation shell 1 includes a coaxially arranged outer shell 11, a heat insulation layer 12, and an inner shell 13, with the heat insulation layer 12 sandwiched between the outer shell 11 and the inner shell 13. A cooling element 9 is disposed in the inner cavity of the inner shell 13. The electrical control part of the rubber compression control mechanism is located in the inner cavity of the inner shell 13. The fixing plate 10 is a prismatic plate with holes and fastening bolts at its two corners. The hollow area is directly below the center of the prismatic plate, facing the lens of the vision terminal. This design allows for more accurate, standardized, and clear acquisition of the rubber sample's posture, and is particularly suitable for testing and monitoring circular or rectangular rubber sealing rings. In this embodiment, the cooling element 9 is a spiral tube connected to a circulating coolant supply system to control the continuous flow of coolant within the spiral tube, thereby removing heat from the inner cavity of the inner shell 13. Similarly, when a high-temperature hot fluid is used as the coolant, it can continuously heat the inner cavity of the inner shell 13, keeping it within a suitable temperature range. In addition, a fan is installed inside the inner shell 13 to enhance the heat exchange efficiency between the inner shell 13 and the cooling element 9. The insulation layer 12 and the insulation cylinder 5 are both made of aerogel material. The rubber compression control mechanism, the vision terminal, the force sensor 18, and the circulating coolant supply system are all connected to the control system, which controls their operation.

[0027] Before use, the device should be debugged and calibrated. The acquired 16 pixels of the rubber sample should be calibrated, and each calibrated pixel corresponds to a unit of actual height. Then, the compression amount of the rubber sample 16 is calculated based on the number of pixels. For example, if the actual height of a calibrated pixel of a certain type of rubber sample 16 is 0.003mm, and the number of pixels in a single column along the height direction of the sidewall of the rubber sample 16 in the uncompressed image is 3000, then the corresponding sidewall height of the rubber sample 16 (i.e., the initial thickness of the rubber sample 16) is 9mm; if the number of pixels in a single column along the height direction of the sidewall of the rubber sample 16 in the compressed image is 2500, then the corresponding sidewall height of the rubber sample 16 (i.e., the thickness of the rubber sample 16 after compression) is 7.5mm; therefore, the compression amount of the rubber sample 16 can be calculated to be 1.5mm. In use, first install the rubber sample 16 at the rubber sample mounting part 2 of the in-situ test monitoring system 21 (if necessary, plate-shaped or rod-shaped samples can be installed on the sample clamping part 22 to facilitate simultaneous testing of these samples), then directly insert the in-situ test monitoring system 21 into the mounting hole on the bottom wall of the test black box 20, then close the cover of the test black box 20, then set the operation flow of the solar tracking equipment and the test black box 20 according to the test requirements, and then start the natural environment cumulative damage test of the rubber material.

[0028] One method for conducting cumulative damage tests on rubber materials in natural environments includes the following steps:

[0029] Step 1: First, debug and calibrate the in-situ test monitoring system 21;

[0030] Step 2: Control the rubber compression control mechanism to its initial state;

[0031] Step 3: Place the rubber sample 16 in the hollow space between the pressure plate 8 and the fixing plate 10. At this point, the sample is in... Figure 7 There is an illustration in the middle;

[0032] Step 4: Control the rubber compression control mechanism to move its telescopic rod to the first target position and then pause. At this point, the fixing plate 10 is just against the top surface of the rubber sample 16, and the state at this time is as follows: Figure 8 As shown;

[0033] Step 5: Insert the in-situ test monitoring system 21 into the mounting hole of the test black box 20;

[0034] Step 6: Control the cooling element 9 to work, control the vision terminal to turn on; start controlling the solar tracking device to rotate according to the time and the set speed, and adjust the attitude so that the top cover of the test black box 20 always faces the sun;

[0035] Step 7: First, control the vision terminal to capture the rubber sample 16 in an uncompressed state, then control the rubber compression control mechanism to move its telescopic rod upward, and capture the rubber sample 16 in a compressed state in real time during this process.

[0036] Step 8: When the rubber sample 16 under compression is compressed to the target thickness, the rubber compression control mechanism is controlled to maintain this state, and then an accelerated test is carried out on the rubber sample 16 according to the preset experimental parameters.

[0037] Step 9: Generate a residual stress-time chart / data of the rubber sample under constant displacement (compression value) conditions based on the obtained compression posture, force value information and test time information.

[0038] During the experiment: when the fixing plate 10 is just against the top surface of the rubber sample 16, the force value fed back by the force sensor 18 is close to zero, and the corresponding compression thickness of the rubber sample 16 is 0. During the subsequent continuous loading of constant stress, the force value fed back by the force sensor 18 is compensated to a constant value, and the corresponding compression thickness of the rubber sample 16 will gradually increase. A series of thickness values ​​will be obtained as time changes. Based on these data, the rubber sample compression thickness-time chart / data can be obtained.

[0039] In further plans, combined with Figure 9 As shown, an annular groove 28 for holding the rubber sealing ring 27 is provided on the pressure plate 8. The annular groove 28 is arranged close to the through hole 6. The pressure plate 8 is made of quartz glass material so that the rubber sealing ring sample can be tested and monitored in situ smoothly.

[0040] In a further application scenario, one method for conducting cumulative environmental damage testing on rubber materials includes the following steps:

[0041] Step 1: First, debug and calibrate the in-situ test monitoring system 21;

[0042] Step 2: Control the rubber compression control mechanism to its initial state;

[0043] Step 3, combined Figure 9 As shown, a rubber sealing ring sample (i.e., rubber sample 16) is placed in the annular groove 28 on the pressure plate 8; for easy differentiation, the rubber sealing ring sample is attached to the... Figure 9 (Identified by number 27 in China).

[0044] Step 4: Control the operation of the rubber compression control mechanism, and stop when the telescopic rod moves up to the first target position. At this time, the fixing plate 10 is just against the top surface of the rubber sample 16.

[0045] Step 5: Insert the in-situ test monitoring system 21 into the mounting hole of the test black box 20;

[0046] Step 6: Control the cooling element 9 to work, control the vision terminal to turn on, and control the test chamber to run; start controlling the solar tracking equipment to rotate according to the time and set speed, and adjust its attitude so that the top cover of the test black box 20 always faces the sun;

[0047] Step 7: First, control the vision terminal to capture the rubber sample 16 in an uncompressed state, then control the rubber compression control mechanism to move its telescopic rod upward, and capture the rubber sample 16 in a compressed state in real time during this process.

[0048] Step 8: When the rubber sample 16 under compression is compressed to the target thickness, the rubber compression control mechanism is controlled to maintain this state, and then an accelerated test is carried out on the rubber sample 16 according to the preset experimental parameters.

[0049] Step 9: Generate a residual stress-time chart / data of the rubber sample under constant displacement (compression value) conditions based on the obtained compression posture, force value information and test time information.

[0050] The integrated device for cumulative damage testing of rubber materials under natural environment provided in this embodiment can enhance the effects of solar radiation heat, diurnal and seasonal temperature differences on rubber materials during in-situ testing, accelerating the aging of rubber materials in natural environments. It can stably and smoothly conduct in-situ damage testing while simulating the working conditions experienced by rubber materials. Using the scheme of this embodiment, in-situ monitoring of the stress relaxation level of rubber samples under pressure is achieved. Online and real-time monitoring of the stress relaxation level of samples is realized under the test environment, ensuring the stability and continuity of monitoring data and improving the authenticity and accuracy of monitoring results. The scheme of this embodiment is simple to operate and highly efficient, especially suitable for in-situ monitoring and detection in low-temperature or high-temperature environments. During the test, there is no need to remove the sample to measure relevant test data, enabling long-term in-situ testing and monitoring of rubber samples under constant displacement or constant stress conditions. Using the scheme of this embodiment, monitoring can be precisely controlled after the rubber sample (including rubber sealing ring samples) is compressed to any target thickness, and the corresponding target thickness error can be controlled within 0.01 mm.

Claims

1. An integrated testing device for cumulative damage of rubber materials under natural environment, comprising a test black box (20), wherein the test black box (20) is installed on a solar tracking device, characterized in that: An in-situ test monitoring system (21) is installed inside the test black box (20). The rubber sample (16) is installed on the in-situ test monitoring system, and the rubber sample (16) can move synchronously with the test black box (20). The device is used to be arranged in polar environments or high-temperature environments with temperatures not lower than 100°C. The in-situ test monitoring system (21) includes a rubber sample mounting part (2), which is located around the central area of ​​the top of the heat insulation shell (1). The rubber sample mounting part (2) is connected to a rubber compression control mechanism located inside the heat insulation shell (1). A vision terminal is installed in the central area of ​​the top of the heat insulation shell (1). The vision terminal is located inside a quartz glass cover (4) and is used to photograph the rubber sample (16). A heat insulation cylinder (5) is installed inside the quartz glass cover (4). The heat insulation cylinder (5) is fitted onto the visual terminal mounting cylinder (7). A through hole (6) is provided radially on the heat insulation cylinder (5). The lens of the visual terminal is located at the through hole (6) and can take pictures of the rubber sample (16) through the through hole (6). The rubber compression control mechanism adopts a telescopic mechanism. A force sensor (18) is installed on the telescopic rod of the telescopic mechanism. A pressure plate (8) is fixedly installed at the top of the telescopic rod. A fixing plate (10) is installed directly above the pressure plate (8). The hollow space between the pressure plate (8) and the fixing plate (10) is used to place the rubber sample (16). When the telescopic rod of the telescopic mechanism retracts, the height of the hollow space increases. When the telescopic rod of the telescopic mechanism extends, the height of the hollow space decreases.

2. The integrated testing device for cumulative damage testing of rubber materials under natural environment according to claim 1, characterized in that: A sample clamping part (22) is provided inside the test black box (20) and next to the in-situ test monitoring system (21). The sample clamping part (22) is used to install plate-shaped or rod-shaped samples.

3. The integrated testing device for cumulative damage testing of rubber materials under natural environment according to claim 1, characterized in that: An installation hole is provided on the bottom wall of the test black box (20), and a columnar in-situ test monitoring system (21) is inserted into the installation hole. The rubber sample (16) is located above the bottom wall of the test black box (20).

4. The integrated testing device for cumulative damage testing of rubber materials under natural environment according to claim 1, characterized in that: The test black box (20) is rotatably connected at both ends to the frame (23) of the solar tracking equipment. One end of the test black box (20) is connected to a horizontally arranged power system, which is used to control the vertical rotation of the test black box (20). The frame (23) is rotatably connected to the base (24) of the solar tracking equipment. The power system of the base (24) is used to control the frame (23) and the test black box (20) to rotate synchronously in the horizontal direction.

5. The integrated testing device for cumulative damage testing of rubber materials under natural environment according to claim 1, characterized in that: The test black box (20) has a cavity at the bottom wall. The test black box (20) located on the left and right sides of the in-situ test monitoring system (21) has a hollow area (26) on the bottom wall. A fan (25) is installed on the side of the hollow area (26). The cavity above and below the bottom wall of the test black box (20) and the hollow area (26) together form a circulating air duct.

6. The integrated testing device for cumulative damage testing of rubber materials under natural environment according to claim 5, characterized in that: The heat insulation shell (1) is cylindrical, and four sets of rubber sample mounting parts (2) are provided on the top of the heat insulation shell (1). Each set of rubber sample mounting parts (2) is equipped with two telescopic mechanisms arranged at intervals. The telescopic rod of each telescopic mechanism is connected to the pressure plate (8) through a linear bearing (17). The lower end of the pressure plate (8) is provided with a first heat insulation layer (15). The heat insulation shell (1) includes an outer shell (11), a second heat insulation layer (12) and an inner shell (13) arranged coaxially. The second heat insulation layer (12) is sandwiched between the outer shell (11) and the inner shell (13). A cooling element (9) is provided in the inner cavity of the inner shell (13). The electrical control part of the rubber compression control mechanism is located in the inner cavity of the inner shell (13). The fixing plate (10) is a prismatic plate. The hollow space is directly below the center of the prismatic plate and faces the lens of the visual terminal.

7. The integrated testing device for cumulative damage testing of rubber materials under natural environment according to claim 6, characterized in that: An annular boss (19) is provided on the upper part of the outer wall of the heat insulation shell (1).

8. The integrated testing device for cumulative damage testing of rubber materials under natural environment according to claim 7, characterized in that: An annular groove (28) for holding a rubber sealing ring (27) is provided on the pressure plate (8). The annular groove (28) is arranged close to the through hole (6). The pressure plate (8) is made of quartz glass.

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