A seal ring swelling test device and method

Abstract

The application provides a sealing ring swelling test device, which comprises a sealed container for hydrogen filling, a temperature control system capable of automatically adjusting the temperature of the sealed container, a mass detection system comprising a cantilever beam for suspending a sealing ring to be tested, a volume detection system, and an information processing system, wherein the mass detection system and the volume detection system are respectively connected with the information processing system in signal, the mass detection system can measure the mass of the sealing ring to be tested in the hydrogen absorption swelling process in real time, the volume detection system can measure the volume of the sealing ring to be tested in the hydrogen absorption swelling process in real time, and the information processing system is used for analysis and processing, so that the changes of the mass and the volume of the sealing ring to be tested in the hydrogen absorption swelling process are calculated. The application further provides a sealing ring swelling test method.

Description

Technical Field

[0001] This invention belongs to the field of sealing ring performance testing technology, specifically, it relates to a sealing ring swelling test device and method, especially for hydrogen O-ring swelling test. Background Technology

[0002] Hydrogen energy, as a clean, efficient, safe, and sustainable new energy source, is considered the most promising clean energy source of the 21st century and a strategic energy development direction for humankind. Intense competition has emerged among countries worldwide in the commercialization of hydrogen-powered transportation. Currently, high-pressure hydrogen storage and transportation has become a highly promising commercial application method due to its advantages such as simple equipment structure, low energy consumption in hydrogen compression production, and fast filling and discharging speeds. O-rings are commonly used as sealing components in high-pressure hydrogen loading and unloading systems, and their sealing performance is a crucial factor that must be considered to ensure the safety and reliability of hydrogen quick-connect fittings.

[0003] In hydrogen loading and unloading systems, O-ring seals come into direct contact with high-pressure, high-purity hydrogen. During this process, hydrogen adsorption, intrusion, dissolution, and diffusion occur. Hydrogen dissolved inside the O-ring will cause a significant increase in the volume of the O-ring seal, resulting in rubber swelling (i.e., hydrogen absorption swelling). Studies have shown that the solubility of hydrogen in rubber materials is directly proportional to the hydrogen pressure.

[0004] Excessive swelling of O-rings inevitably leads to sealing failure in hydrogen loading and unloading systems, and the consequences of hydrogen leakage are unimaginable. Therefore, the commonly used method to characterize O-ring swelling is the cumulative measurement method. This involves simultaneously absorbing hydrogen and swelling N O-rings, then measuring the mass and volume increases of all N O-rings together, and using the average of the cumulative effect to characterize the hydrogen absorption and swelling of a single O-ring. However, this method has drawbacks such as wasting O-rings and inaccurate measurement.

[0005] Therefore, there is an urgent need for a sealing ring swelling test device and method that can accurately characterize the swelling of hydrogen O-rings, which is very important for the reliable and safe performance of hydrogen loading and unloading systems. Summary of the Invention

[0006] To address the technical problems described above, this invention aims to provide a sealing ring swelling test device. This device can measure the weight and volume changes of the sealing ring during hydrogen absorption and swelling in real time online. The measurement results are highly accurate. Furthermore, this sealing ring swelling test device can measure the weight and volume changes of the sealing ring during hydrogen absorption and swelling under different temperature and pressure conditions in real time, accurately characterizing the swelling of hydrogen O-rings and ensuring the safety of hydrogen loading and unloading systems.

[0007] The present invention also provides a method for testing the swelling of sealing rings.

[0008] Therefore, according to a first aspect of the present invention, a sealing ring swelling test device is provided, comprising: a sealed container for filling with hydrogen; a temperature control system capable of automatically adjusting the temperature of the sealed container; a mass detection system including a cantilever arm for suspending the sealing ring to be tested; a volume detection system; and an information processing system, wherein the mass detection system and the volume detection system are respectively signal-connected to the information processing system; wherein the mass detection system is capable of measuring the mass of the sealing ring to be tested during the hydrogen absorption and swelling process in real time, and the volume detection system is capable of measuring the volume of the sealing ring to be tested during the hydrogen absorption and swelling process in real time, and the data are analyzed and processed by the information processing system to calculate the changes in mass and volume of the sealing ring to be tested during the hydrogen absorption and swelling process.

[0009] In one embodiment, the cantilever arm is disposed within the sealed container, and a first end of the cantilever arm extends outward through the side wall of the sealed container. A resonant sensor is provided at the first end of the cantilever arm, and the resonant sensor is connected to the signal of the information processing system.

[0010] The test sealing ring absorbs hydrogen and swells, causing the cantilever arm to deform. The resonant sensor can detect the deformation of the cantilever arm, causing a change in the vibration waveform, which is then uploaded to the information processing system. The information processing system analyzes and compares the changes to calculate the mass change of the test sealing ring.

[0011] In one embodiment, the volume detection system includes a radial camera and an axial camera, both of which are signal-connected to the information processing system.

[0012] The radial camera and the axial camera can capture images of the sealing ring under test in real time and upload the captured images to the information processing system. The information processing system can construct a three-dimensional change map of the sealing ring under test, thereby calculating the volume change of the sealing ring under test in real time.

[0013] In one embodiment, the sealing container is made of a transparent material, the radial camera is positioned above the sealing container, and the axial camera is positioned on one side of the sealing container. The radial camera and the axial camera are capable of capturing images of the sealing ring under test in real time through the sealing container.

[0014] In one embodiment, the temperature control system includes a heat exchanger and a temperature transmitter installed at the bottom of the sealed container, and a PID controller connected between the heat exchanger and the temperature transmitter. The temperature transmitter can detect the temperature inside the sealed container in real time and feed it back to the PID controller. The PID controller can control the heat exchanger to adjust the temperature inside the sealed container, thereby enabling the testing of the swelling of the sealing ring under test at different temperatures.

[0015] In one embodiment, an inlet solenoid valve is installed on the inlet pipeline of the heat exchanger. The inlet solenoid valve is signal-connected to the PID controller. The PID controller can control the inlet solenoid valve to open or close, thereby controlling the flow rate of the medium in the heat exchanger and adjusting the temperature inside the sealed container.

[0016] In one embodiment, a pressure transmitter is provided at the bottom of the sealed container, the pressure transmitter being used to measure the pressure value inside the sealed container.

[0017] In one embodiment, the sealed container is provided with a hydrogen inlet valve and a hydrogen outlet valve, which are disposed opposite to each other on the side wall of the sealed container.

[0018] According to a second aspect of the present invention, a method for testing the swelling of a sealing ring is provided, comprising the following steps:

[0019] Provide a sealing ring swelling test device as described above, which suspends the sealing ring to be tested on the cantilever arm;

[0020] Hydrogen gas is filled into the sealed container until the pressure inside the sealed container reaches a predetermined value;

[0021] The target temperature is set by the PID controller of the temperature control system, and the temperature inside the sealed container is maintained at the target temperature by the temperature control system.

[0022] The sealing ring under test absorbs hydrogen and swells. The mass of the sealing ring under test during the hydrogen absorption and swelling process is measured in real time by the mass detection system, and the volume of the sealing ring under test during the hydrogen absorption and swelling process is measured in real time by the volume detection system. The data is then analyzed and processed by the information processing system to calculate the changes in mass and volume of the sealing ring under test during the hydrogen absorption and swelling process.

[0023] By adjusting the predetermined pressure and target temperature inside the sealed container, the weight and volume changes of the sealing ring under test during hydrogen absorption and swelling can be measured under different temperature and pressure conditions.

[0024] In one embodiment, the sealing ring to be tested is suspended near the second end of the cantilever arm.

[0025] Compared with the prior art, the advantages of this application are:

[0026] The O-ring swelling test device according to the present invention utilizes the resonance method to measure the weight of the O-ring swelling after absorbing hydrogen in real time. Furthermore, a high-definition camera captures real-time images of the axial and radial volume changes of the O-ring during hydrogen absorption and swelling. The image processing system of the information processing system 5 then constructs a three-dimensional change map of the O-ring, and calculates the volume change of the O-ring during hydrogen absorption and swelling in real time. This significantly improves measurement accuracy and greatly enhances the reliability of the O-ring swelling test results. According to the O-ring swelling test method of the present invention, during specific testing, the O-ring swelling test device can set different target temperatures as needed through the PID controller of the temperature control system, thereby measuring the swelling of the O-ring under test at different temperatures. Moreover, by setting different hydrogen pressures during hydrogen filling, the swelling of the O-ring under test can be measured at different pressures. Therefore, this sealing ring swelling test device can measure the weight and volume changes of the sealing ring during the hydrogen absorption and swelling process under different temperature and pressure conditions in real time. Its measurement is accurate and can record the complete evolution process of the O-ring sealing ring's hydrogen absorption and swelling in real time. Thus, it can accurately characterize the swelling of the hydrogen-bearing sealing ring under test, which is very beneficial to ensuring the safety of the hydrogen loading and unloading system. Attached Figure Description

[0027] The present invention will now be described with reference to the accompanying drawings.

[0028] Figure 1 The structure of the sealing ring swelling test apparatus according to the present invention is shown.

[0029] In this application, all drawings are schematic and are used only to illustrate the principles of the invention, and are not drawn to scale. Detailed Implementation

[0030] The invention will now be described with reference to the accompanying drawings.

[0031] Figure 1 The structure of the sealing ring swelling test apparatus 100 according to the present invention is shown. Figure 1As shown, the sealing ring swelling test device 100 includes a sealed container 1 for filling with hydrogen, a temperature control system 2 that can automatically adjust and control the temperature inside the sealed container 1, a mass detection system 3, a volume detection system 4, and an information processing system 5. The mass detection system 3 includes a cantilever arm 31 for suspending the sealing ring 9 to be tested. The mass detection system 3 and the volume detection system 4 are respectively connected to the information processing system 5. The sealing ring swelling test device 100 can measure the mass of the sealing ring 9 under test in real time during the hydrogen absorption and swelling process through the mass detection system 3, and can measure the volume of the sealing ring 9 under test in real time during the hydrogen absorption and swelling process through the volume detection system 4. The data is analyzed and processed by the information processing system 5 to calculate the changes in mass and volume of the sealing ring 9 under test during the hydrogen absorption and swelling process. The information processing system 5 can be, for example, a computer, and the sealing ring 9 under test can be, for example, an O-ring.

[0032] According to the present invention, the sealed container 1 is constructed into a cuboid shape. In one embodiment, the sealed container 1 is made of a transparent material, such as glass. The sealed container 1 can be filled with hydrogen gas to simulate the working environment of an O-ring. The upper cap of the sealed container 1 can be configured as a movable structure, which can be fitted and sealed with the side wall of the sealed container 1. Before testing, the upper cap of the sealed container 1 can be removed, and the O-ring to be tested can be suspended on the cantilever arm 31.

[0033] According to the present invention, the mass detection system 3 can measure the mass of the sealing ring 9 under test in real time during the hydrogen absorption and swelling process, thereby recording the weight change of the sealing ring 9 under test in real time. Figure 1As shown, a cantilever arm 31 is disposed in a sealed container 1, with its first end extending outward through the side wall of the sealed container 1. A resonant sensor 32 is provided at the first end of the cantilever arm 31, and the resonant sensor 32 is connected to the information processing system 5. The second end of the cantilever arm 31 is located inside the sealed container 1 and extends towards the center. During the hydrogen absorption and swelling process, the sealing ring 9 to be tested is suspended near the second end of the cantilever arm 31. The swelling of the sealing ring 9 due to hydrogen absorption causes an increase in weight, resulting in a slight deformation of the cantilever arm 31. The resonant sensor 32 can detect the minute deformation of the cantilever arm 31, causing a change in the vibration waveform of the resonant sensor 32. This change in vibration waveform signal is uploaded to the information processing system 5. The information processing system 5 analyzes and compares the collected information to calculate the mass change of the sealing ring 9 to be tested. Thus, the subtle mass change of the sealing ring 9 to be tested during the hydrogen absorption and swelling process is indirectly measured. The sealing ring 9 to be tested is suspended near the second end of the cantilever arm 10, which is at the far end. This allows the slight weight change of the sealing ring 9 to be amplified by the lever effect of the cantilever arm 31, thus the accuracy of this resonance method in measuring slight weight changes is much higher than that of the weighing method, which can greatly improve the measurement accuracy of the sealing ring swelling test device 100.

[0034] like Figure 1 As shown, the volume detection system 4 includes a radial camera 41 and an axial camera 42. Both the radial camera 41 and the axial camera 42 are connected to the information processing system 5 via data cables. The radial camera 41 is positioned above the sealed container 1. During the hydrogen absorption and swelling process of the sealing ring 9 under test, the radial camera 41 can be aligned with the sealing ring 9 suspended on the cantilever arm 31, thereby capturing real-time images of the radial volume change of the sealing ring 9. The axial camera 42 is positioned on one side of the sealed container. Figure 1 (On the left side of the image), during the hydrogen absorption and swelling process of the sealing ring 9 under test, the axial camera 42 can be aimed at the sealing ring 9 suspended on the cantilever arm 31, thereby capturing the axial volume change of the sealing ring 9 in real time. Thus, the radial camera 41 and the axial camera 42 can record the volume change of the sealing ring 9 under test and upload the captured images to the information processing system 5. The information processing system 5 can construct a three-dimensional change map of the sealing ring 9 under test based on the captured image information, thereby calculating the volume change of the sealing ring 9 under test during the hydrogen absorption and swelling process in real time.

[0035] In this embodiment, both the radial camera 41 and the axial camera 42 are high-definition cameras. The radial camera 41 and the axial camera 42 can capture and record the volume change of the sealing ring 9 under test in real time through the sealed container 1, and can ensure the capture of high-definition images, which is very beneficial to improving the accuracy of image acquisition and further improving the measurement accuracy of the sealing ring swelling test device 100.

[0036] According to the present invention, the temperature control system 2 includes a heat exchanger 21 and a temperature transmitter 22 installed at the bottom of the sealed container 1, and a PID controller 23 connected between the heat exchanger 21 and the temperature transmitter 22 via a data line signal. The PID controller 23 can set the target temperature. During the test, the temperature transmitter 22 can detect the temperature inside the sealed container 1 in real time and provide real-time feedback to the PID controller 23. The PID controller 23 can control the heat exchanger 21 to adjust the temperature inside the sealed container 1, thereby maintaining the temperature inside the sealed container 1 at the target temperature. Different target temperatures can be set via the PID controller 23 according to actual needs, enabling the sealing ring swelling test device 100 to test the swelling of the sealing ring 9 under test at different temperatures.

[0037] like Figure 1 As shown, an inlet solenoid valve 24 is installed at the inlet pipe of heat exchanger 4. The inlet solenoid valve 24 is connected to the PID controller 23 via a control line. The heat exchanger 21 can cool or heat the sealed container 1, thereby enabling the measurement of the swelling of the sealing ring 9 under test at different temperatures. The temperature inside the sealed container 1 is dynamically adjusted by controlling the flow rate of the medium inside the heat exchanger 21. Specifically, the temperature parameter inside the sealed container 1 is fed back to the PID controller 23 in real time by the temperature transmitter 22. The PID controller 23 controls the opening or closing of the inlet solenoid valve 24, thereby controlling the flow rate of the medium inside the heat exchanger 21, thus achieving the adjustment of the temperature inside the sealed container 1.

[0038] According to the present invention, a pressure transmitter 6 is further provided at the bottom of the sealed container 1. The pressure transmitter 6 is used to measure the pressure value inside the sealed container 1. During the process of filling the sealed container 1 with hydrogen, the pressure value inside the sealed container 1 is measured by the pressure transmitter 6 according to actual needs, and filling is stopped when the hydrogen is filled to a predetermined test pressure value. Thus, the test pressure inside the sealed container 1 can be set by the pressure transmitter 6.

[0039] like Figure 1 As shown, the sealed container 1 is equipped with a hydrogen inlet valve 11 and a hydrogen outlet valve 12, which are arranged opposite to each other on the side wall of the sealed container 1. Figure 1 (The left and right side walls of the container). The hydrogen inlet valve 11 is used to connect to the inlet pipeline for filling the sealed container 1 with hydrogen. The hydrogen outlet valve 12 is used to connect to the outlet pipeline for discharging the hydrogen from the sealed container 1.

[0040] According to the present invention, a method for testing the swelling of a sealing ring is also proposed. This method uses the sealing ring swelling testing device 100 according to the present invention, which can measure the weight and volume changes of the sealing ring in real time during the hydrogen absorption and swelling process. The measurement results are highly accurate and can accurately characterize the swelling of the hydrogen O-ring sealing ring. The sealing ring swelling testing method is described in detail below.

[0041] First, a sealing ring swelling test device 100 is provided, and the sealing ring 9 to be tested is suspended on the cantilever arm 31. Specifically, the sealing ring 9 to be tested is suspended at a position near the second end of the cantilever arm 31.

[0042] Next, hydrogen gas is added to the sealed container 1 until the pressure inside the sealed container 1 reaches a predetermined value. Specifically, the inlet valve 11 and the outlet valve 12 are first opened to begin adding a small amount of hydrogen gas into the sealed container 1, replacing the other gases inside. Then, the outlet valve 12 is closed, and hydrogen gas continues to be added to the sealed container 1. The pressure value inside the sealed container 1 is measured using the pressure transmitter 6 until the hydrogen gas reaches the predetermined test pressure value, at which point the inlet valve 1 is closed. This completes the hydrogen filling process.

[0043] Then, the target temperature is set through the PID controller 23 of the temperature control system 2. Throughout the test, the temperature control system 2 is able to maintain the temperature inside the sealed container 1 at the target temperature.

[0044] After setting the pressure and temperature inside the sealed container 1, the working environment of the sealing ring in hydrogen gas is simulated. The sealing ring 9 under test absorbs hydrogen and swells in the sealed container 1. During the hydrogen absorption and swelling process, the mass detection system 3 measures the mass of the sealing ring 9 under test in real time and records the mass change of the sealing ring 9 under test in real time. Specifically, the increase in weight of the sealing ring 9 under test due to hydrogen absorption and swelling causes the cantilever arm 31 to deform. The slight deformation of the cantilever arm 31 causes the vibration waveform of the resonant sensor 32 to change. The vibration waveform of the resonant sensor 32 is uploaded to the information processing system 5 through the data line. The information processing system 5 analyzes and compares the changes in the vibration waveform and finally calculates the slight increase in mass of the sealing ring 9 under test during hydrogen absorption and swelling.

[0045] Simultaneously, the volume of the sealing ring 9 under test during hydrogen absorption and swelling is measured in real time by the volume detection system 4, and the volume change of the sealing ring 9 under test during the hydrogen absorption and swelling process is recorded in real time. Specifically, the radial camera 41 captures the radial volume change of the sealing ring 9 under test during hydrogen absorption and swelling in real time, and the axial camera 42 captures the axial volume change of the sealing ring 9 under test during hydrogen absorption and swelling in real time. The high-definition images captured by the radial camera 41 and the axial camera 42 are uploaded to the information processing system 5. The high-definition image processing system in the information processing system 5 is used to construct a three-dimensional change map of the sealing ring 9 under test, and then the increase in the volume of the sealing ring 9 under test during hydrogen absorption and swelling is calculated.

[0046] According to the present invention, during the hydrogen absorption and swelling process of the sealing ring 9 under test, the temperature transmitter 22 provides real-time feedback of the temperature parameters inside the sealed container 1 and transmits them to the PID controller 23. The PID controller 23 controls the opening or closing of the inlet solenoid valve 24, thereby controlling the flow rate of the medium inside the heat exchanger 24, thereby adjusting the temperature inside the sealed container 1 so that it is always kept at the target temperature.

[0047] After completing the hydrogen absorption and swelling test of the sealing ring 9, open the outlet valve 12 to discharge the hydrogen gas in the sealed container 1. Open the inlet valve 11 to fill the sealed container 1 with nitrogen gas, thereby replacing the remaining hydrogen gas in the sealed container 1 and protecting the safety of the sealing ring swelling test device 100.

[0048] The O-ring swelling test device 100 of the present invention uses a resonance method to measure the weight of the O-ring swelling after absorbing hydrogen in real time. It also uses a high-definition camera to capture real-time images of the axial and radial volume changes of the O-ring during hydrogen absorption and swelling, and constructs a three-dimensional change map of the O-ring using the image processing system of the information processing system 5. This allows for real-time calculation of the volume change of the O-ring during hydrogen absorption and swelling, significantly improving measurement accuracy and reliability of the test results. According to the O-ring swelling test method of the present invention, during specific testing, the O-ring swelling test device 100 can set different target temperatures as needed through the PID controller 23 of the temperature control system 2, thereby measuring the swelling of the O-ring 9 under test at different temperatures. Furthermore, by setting different hydrogen pressures during hydrogen filling, the swelling of the O-ring 9 under test can be measured at different pressures. Therefore, the sealing ring swelling test device 100 can realize real-time measurement of the weight and volume changes of the sealing ring during the hydrogen absorption and swelling process under different temperature and pressure conditions. Its measurement is accurate and can record the complete evolution process of the O-ring sealing ring's hydrogen absorption and swelling in real time, thus accurately characterizing the swelling of the hydrogen-bearing sealing ring under test, which is very beneficial to ensuring the safety of the hydrogen loading and unloading system.

[0049] The following describes the sealing ring swelling test device 100 and sealing ring swelling test method according to the present invention by measuring the swelling of the sealing ring 9 under different pressure and temperature environments and in different embodiments.

[0050] Taking the EPDM O-ring as an example under test conditions of -40℃ and 2MPa.

[0051] First, a sealing ring swelling test device 100 is provided, and the EPDM O-ring 9 is suspended on the cantilever arm 31 at a position near the second end.

[0052] Next, open the inlet valve 11 and the outlet valve 12 to begin filling the sealed container 1 with a small amount of hydrogen gas, thereby replacing the other gases in the sealed container 1. Then, close the outlet valve 12 and continue filling the sealed container 1 with hydrogen gas until the pressure value of the pressure transmitter 6 reaches 2 MPa. At this point, close the inlet valve 11, thus completing the hydrogen filling process.

[0053] Next, the target temperature for the PID controller 23 is set to -40℃. The temperature transmitter 22 can feed back temperature parameters to the PID controller 23 in real time. The PID controller 23 calculates the difference between the target temperature value and the temperature value measured by the temperature transmitter 22 in real time, and uses the difference to control the opening or closing of the inlet solenoid valve 24, thereby controlling the flow rate of the medium in the heat exchanger 21, thus maintaining the temperature inside the sealed container 1 at -40℃. This simulates the working environment of the O-ring seal in hydrogen gas within the sealed container 1.

[0054] The EPDM O-ring 9 absorbs hydrogen and swells in a sealed container. During this process, the swelling of the EPDM O-ring 9 due to hydrogen absorption leads to an increase in weight, which in turn causes deformation of the cantilever arm 31. This slight deformation of the cantilever arm 31 causes a change in the vibration waveform of the resonant sensor 32. The vibration waveform of the resonant sensor 32 is uploaded to the information processing system 5 via a data line. The information processing system 5 analyzes and compares the changes in the vibration waveform, and finally calculates the slight increase in mass of the EPDM O-ring 9 during hydrogen absorption and swelling. The initial mass of the EPDM O-ring 9 is 513.55 mg, and it eventually swells to 531.52 mg, representing a mass increase of 3.49%.

[0055] Simultaneously, during the hydrogen absorption and swelling process of the EPDM O-ring 9, the volume detection system 4 uses radial camera 41 and axial camera 42 to capture real-time images of the axial and radial volume changes of the EPDM O-ring 9 during hydrogen absorption and swelling. The volume detection system 4 uploads the captured high-definition images to the information processing system 5 in real-time. The image processing system in the information processing system 5 constructs a three-dimensional change map of the EPDM O-ring 9, thereby enabling real-time calculation of the hydrogen absorption and swelling volume change of the EPDM O-ring 9. The initial volume of the EPDM O-ring 9 is 493.8 mm². 3 It eventually swelled to 533.2 mm after absorbing hydrogen. 3 The volume of the EPDM O-ring 9 increased by 7.98%.

[0056] Taking the EPDM O-ring as an example under test conditions of 25℃ and 3MPa.

[0057] First, a sealing ring swelling test device 100 is provided, and the EPDM O-ring 9 is suspended on the cantilever arm 31 at a position near the second end.

[0058] Next, open inlet valve 11 and outlet valve 12 to begin filling a small amount of hydrogen into the sealed container 1, thereby replacing the other gases inside the sealed container 1. Then, close outlet valve 12 and continue filling the sealed container 1 with hydrogen until the pressure value of pressure transmitter 6 reaches 3 MPa. At this point, close inlet valve 11, thus completing the hydrogen filling process.

[0059] Next, the target temperature for the PID controller 23 is set to 25°C. The temperature transmitter 22 can feed back temperature parameters to the PID controller 23 in real time. The PID controller 23 calculates the difference between the target temperature value and the temperature value measured by the temperature transmitter 22 in real time, and uses this difference to control the opening or closing of the inlet solenoid valve 24, thereby controlling the flow rate of the medium in the heat exchanger 21, thus maintaining the temperature inside the sealed container 1 at 25°C. This simulates the working environment of an O-ring seal in hydrogen gas within the sealed container 1.

[0060] The EPDM O-ring 9 absorbs hydrogen and swells in a sealed container. During this process, the swelling of the EPDM O-ring 9 due to hydrogen absorption leads to an increase in weight, which in turn causes deformation of the cantilever arm 31. This slight deformation of the cantilever arm 31 causes a change in the vibration waveform of the resonant sensor 32. The vibration waveform of the resonant sensor 32 is transmitted to the information processing system 5 via a data line. The information processing system 5 analyzes and compares the changes in the vibration waveform, and finally calculates the slight increase in mass of the EPDM O-ring 9 during hydrogen absorption and swelling. The initial mass of the EPDM O-ring 9 is 515.73 mg, and it eventually swells to 542.13 mg, representing a mass increase of 5.12%.

[0061] Simultaneously, during the hydrogen absorption and swelling process of the EPDM O-ring 9, the volume detection system 4 uses radial camera 41 and axial camera 42 to capture real-time images of the axial and radial volume changes of the EPDM O-ring 9 during hydrogen absorption and swelling. The volume detection system 4 uploads the captured high-definition images to the information processing system 5 in real-time. The image processing system in the information processing system 5 constructs a three-dimensional change map of the EPDM O-ring 9, thereby enabling real-time calculation of the hydrogen absorption and swelling volume change of the EPDM O-ring 9. The initial volume of the EPDM O-ring 9 is 498.1 mm². 3 It eventually swelled to 564.05 mm after absorbing hydrogen. 3 The volume of the EPDM O-ring 9 increased by 13.24%.

[0062] Taking the EPDM O-ring as an example under test conditions of 85℃ and 4MPa.

[0063] First, a sealing ring swelling test device 100 is provided, and the EPDM O-ring 9 is suspended on the cantilever arm 31 at a position near the second end.

[0064] Next, open inlet valve 11 and outlet valve 12 to begin filling a small amount of hydrogen into the sealed container 1, thereby replacing the other gases inside the sealed container 1. Then, close outlet valve 12 and continue filling the sealed container 1 with hydrogen until the pressure value of pressure transmitter 6 reaches 4 MPa. At this point, close inlet valve 11, thus completing the hydrogen filling process.

[0065] Next, the target temperature for the PID controller 23 is set to 85℃. The temperature transmitter 22 can feed back temperature parameters to the PID controller 23 in real time. The PID controller 23 calculates the difference between the target temperature value and the temperature value measured by the temperature transmitter 22 in real time, and uses this difference to control the opening or closing of the inlet solenoid valve 24, thereby controlling the flow rate of the medium in the heat exchanger 21, thus maintaining the temperature inside the sealed container 1 at 85℃. This simulates the working environment of an O-ring seal in hydrogen gas within the sealed container 1.

[0066] The EPDM O-ring 9 absorbs hydrogen and swells in a sealed container. During this process, the swelling of the EPDM O-ring 9 due to hydrogen absorption leads to an increase in weight, which in turn causes deformation of the cantilever arm 31. This slight deformation of the cantilever arm 31 causes a change in the vibration waveform of the resonant sensor 32. The vibration waveform of the resonant sensor 32 is uploaded to the information processing system 5 via a data line. The information processing system 5 analyzes and compares the changes in the vibration waveform, and finally calculates the slight increase in mass of the EPDM O-ring 9 during hydrogen absorption and swelling. The initial mass of the EPDM O-ring 9 is 510.56 mg, and it eventually swells to 550.43 mg, representing a mass increase of 7.81%.

[0067] Simultaneously, during the hydrogen absorption and swelling process of the EPDM O-ring 9, the volume detection system 4 uses a radial camera 41 and an axial camera 42 to capture real-time images of the axial and radial volume changes of the EPDM O-ring 9. The volume detection system 4 uploads the captured high-definition images to the information processing system 5 in real time. The image processing system in the information processing system 5 constructs a three-dimensional change map of the EPDM O-ring 9, thereby enabling real-time calculation of the hydrogen absorption and swelling volume change of the EPDM O-ring 9. The initial volume of the EPDM O-ring 9 is 489.7 mm². 3 It eventually swelled to 596.26 mm after absorbing hydrogen. 3 The volume of the EPDM O-ring 9 increased by 21.76%.

[0068] Taking the EPDM O-ring as an example under test conditions of 65℃ and 20MPa.

[0069] First, a sealing ring swelling test device 100 is provided, and the EPDM O-ring 9 is suspended on the cantilever arm 31 at a position near the second end.

[0070] Next, open inlet valve 11 and outlet valve 12 to begin filling a small amount of hydrogen into the sealed container 1, thereby replacing the other gases inside the sealed container 1. Then, close outlet valve 12 and continue filling the sealed container 1 with hydrogen until the pressure value of pressure transmitter 6 reaches 20 MPa. At this point, close inlet valve 11, thus completing the hydrogen filling process.

[0071] Next, the target temperature for the PID controller 23 is set to 65℃. The temperature transmitter 22 can feed back the temperature parameter to the PID controller 23 in real time. The PID controller 23 calculates the difference between the target temperature value and the temperature value measured by the temperature transmitter 22 in real time, and uses the difference to control the opening or closing of the inlet solenoid valve 24, thereby controlling the flow rate of the medium in the heat exchanger 21, thus maintaining the temperature in the sealed container 1 at 65℃. This simulates the working environment of the O-ring seal in hydrogen gas within the sealed container 1.

[0072] The EPDM O-ring 9 absorbs hydrogen and swells in a sealed container. During this process, the swelling of the EPDM O-ring 9 due to hydrogen absorption leads to an increase in weight, which in turn causes deformation of the cantilever arm 31. This minute deformation of the cantilever arm 31 causes a change in the vibration waveform of the resonant sensor 32. The vibration waveform of the resonant sensor 32 is uploaded to the information processing system 5 via a data line. The information processing system 5 analyzes and compares the changes in the vibration waveform, and finally calculates the slight increase in mass of the EPDM O-ring 9 during hydrogen absorption and swelling. The initial mass of the EPDM O-ring 9 is 512.73 mg, and it eventually swells to 572.56 mg, representing a mass increase of 11.67%.

[0073] Simultaneously, during the hydrogen absorption and swelling process of the EPDM O-ring 9, the volume detection system 4 uses radial camera 41 and axial camera 42 to capture real-time images of the axial and radial volume changes of the EPDM O-ring 9 during hydrogen absorption and swelling. The volume detection system 4 uploads the captured high-definition images to the information processing system 5 in real-time. The image processing system in the information processing system 5 constructs a three-dimensional change map of the EPDM O-ring 9, thereby enabling real-time calculation of the hydrogen absorption and swelling volume change of the EPDM O-ring 9. The initial volume of the EPDM O-ring 9 is 495.9 mm². 3 It eventually swelled to 678.44 mm after absorbing hydrogen. 3 The volume of the EPDM O-ring 9 increased by 36.81%.

[0074] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and does not constitute any limitation on the present invention. Although the present invention 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 invention should be included within the protection scope of the present invention.

Claims

1. A sealing ring swelling test device, comprising: A sealed container for filling hydrogen (1); Temperature control system (2), which can automatically adjust the temperature of the sealed container; The quality inspection system (3) includes a cantilever arm (31) for suspending the sealing ring (9) to be tested. The cantilever arm is set in the sealed container, and the first end of the cantilever arm extends outward through the side wall of the sealed container. A resonance sensor (32) is provided at the first end of the cantilever arm. The resonance sensor is connected to the information processing system. The sealing ring to be tested absorbs hydrogen and swells, causing the cantilever arm to deform. The resonance sensor can detect the deformation of the cantilever arm and cause the vibration waveform to change and upload it to the information processing system. The information processing system analyzes and compares the changes to calculate the mass change of the sealing ring to be tested. Volume detection system (4); as well as Information processing system (5), wherein the quality detection system and the volume detection system are respectively signal-connected to the information processing system; The mass detection system can measure the mass of the sealing ring under test in real time during the hydrogen absorption and swelling process, and the volume detection system can measure the volume of the sealing ring under test in real time during the hydrogen absorption and swelling process. The data is then analyzed and processed by the information processing system to calculate the changes in mass and volume of the sealing ring under test during the hydrogen absorption and swelling process.

2. The sealing ring swelling test device according to claim 1, characterized in that, The volume detection system includes a radial camera (41) and an axial camera (42), both of which are connected to the information processing system via signal transmission. The radial camera and the axial camera can capture images of the sealing ring under test in real time and upload the captured images to the information processing system. The information processing system can construct a three-dimensional change map of the sealing ring under test, thereby calculating the volume change of the sealing ring under test in real time.

3. The sealing ring swelling test device according to claim 2, characterized in that, The sealed container is made of transparent material. The radial camera is positioned above the sealed container, and the axial camera is positioned on one side of the sealed container. The radial camera and the axial camera can capture images of the sealing ring under test in real time through the sealed container.

4. The sealing ring swelling test device according to claim 1, characterized in that, The temperature control system includes a heat exchanger (21) and a temperature transmitter (22) installed at the bottom of the sealed container, and a PID controller (23) with a signal connected between the heat exchanger and the temperature transmitter. The temperature transmitter can detect the temperature inside the sealed container in real time and feed it back to the PID controller. The PID controller can control the heat exchanger to adjust the temperature inside the sealed container, thereby enabling the testing of the swelling of the sealing ring under test at different temperatures.

5. The sealing ring swelling test device according to claim 4, characterized in that, An inlet solenoid valve (24) is installed on the inlet pipeline of the heat exchanger. The inlet solenoid valve is connected to the PID controller signal. The PID controller can control the opening or closing of the inlet solenoid valve to control the flow rate of the medium in the heat exchanger, thereby regulating the temperature inside the sealed container.

6. The sealing ring swelling test device according to claim 1, characterized in that, A pressure transmitter (6) is provided at the bottom of the sealed container, which is used to measure the pressure value inside the sealed container.

7. The sealing ring swelling test device according to claim 1, characterized in that, The sealed container is provided with a hydrogen inlet valve (11) and a hydrogen outlet valve (12), which are arranged opposite to each other on the side wall of the sealed container.

8. A method for testing the swelling of a sealing ring, comprising the following steps: A sealing ring swelling test apparatus according to any one of claims 1 to 7 is provided, wherein the sealing ring to be tested is suspended on the cantilever arm; Hydrogen gas is filled into the sealed container until the pressure inside the sealed container reaches a predetermined value; The target temperature is set by the PID controller of the temperature control system, and the temperature inside the sealed container is maintained at the target temperature by the temperature control system. The sealing ring under test absorbs hydrogen and swells. The mass of the sealing ring under test during the hydrogen absorption and swelling process is measured in real time by the mass detection system, and the volume of the sealing ring under test during the hydrogen absorption and swelling process is measured in real time by the volume detection system. The data is then analyzed and processed by the information processing system to calculate the changes in mass and volume of the sealing ring under test during the hydrogen absorption and swelling process. By adjusting the predetermined pressure and target temperature inside the sealed container, the weight and volume changes of the sealing ring under test during hydrogen absorption and swelling can be measured under different temperature and pressure conditions.

9. The method for testing the swelling of a sealing ring according to claim 8, characterized in that, The sealing ring to be tested is suspended near the second end of the cantilever arm.

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