Seal ring detection device based on self-tightening rotating shaft

Abstract

The utility model relates to detection field provides a kind of sealing ring detection device based on self-tightening type pivot.The sealing ring detection device based on self-tightening type pivot includes shell, shell defines test cavity, test cavity is used to accommodate the sealing ring to be measured;Pivot assembly, pivot assembly is rotatably threaded in shell, pivot assembly includes: first pivot section, first pivot section at least part is located outside test cavity;Second pivot section, second pivot section is configured to install the sealing ring to be measured, and at least part is located inside test cavity, first pivot section and second pivot section are detachably connected;Locking member, locking member is used to lock the first pivot section and second pivot section after connection, to prevent the relative movement of both. The sealing ring detection device based on self-tightening type pivot is suitable for the rapid detection of batch sealing ring, and detection efficiency is high, reduces maintenance cost.

Description

Technical Field

[0001] This utility model relates to the field of testing, and provides a sealing ring testing device based on a self-tightening rotating shaft. Background Technology

[0002] Traditional high-pressure hydrogen valve sealing shafts are mostly of an integral structure. While this structure is simple, installation, commissioning, maintenance, and replacement of valves or seals of different specifications are complex and time-consuming. Assembling and commissioning the test bench often requires extensive disassembly of the internal structure of the high-pressure chamber, which not only increases operational difficulty but also severely impacts testing efficiency. Furthermore, the dynamic seals on the shaft are consumable parts and require periodic replacement. However, due to the integral shaft design, seal replacement becomes cumbersome. Sometimes, it may be necessary to remove the entire shaft from the high-pressure chamber for replacement, increasing operational difficulty and time costs, further affecting the efficiency of testing and maintenance. Utility Model Content

[0003] This utility model provides a sealing ring detection device based on a self-tightening rotating shaft to solve the problem of low detection efficiency of sealing rings in related technologies.

[0004] This utility model embodiment provides a sealing ring detection device based on a self-tightening rotating shaft, comprising: A housing that defines a test chamber for accommodating a sealing ring to be tested; A pivot assembly rotatably disposed within the housing, the pivot assembly comprising: A first rotating shaft section, at least partially located outside the test cavity; A second rotating shaft section, configured to mount the seal ring to be tested and at least partially located inside the test chamber, wherein the first rotating shaft section and the second rotating shaft section are detachably connected; A locking element is used to lock the connected first and second rotating shaft segments to prevent them from moving relative to each other.

[0005] According to one embodiment of the present invention, after the first rotating shaft segment and the second rotating shaft segment are connected, an assembly gap is formed, and the locking member is a locking pin, which is configured to be inserted into the assembly gap.

[0006] According to one embodiment of the present invention, the locking pin is fixed to the first rotating shaft section by a thread.

[0007] According to one embodiment of the present invention, the first shaft segment and the second shaft segment are connected by an interlocking connection structure, which is used to transmit torque and bear axial load.

[0008] According to one embodiment of the present invention, the interlocking connection structure includes: A protrusion is formed in one of the first pivot segment and the second pivot segment; A groove, adapted to the protrusion, is formed in the other of the first and second pivot segments.

[0009] According to one embodiment of the present invention, one end of the first rotating shaft segment is configured to connect to a drive mechanism to drive the rotating shaft assembly to rotate.

[0010] According to one embodiment of the present invention, the drive mechanism is configured to drive the rotating shaft assembly to perform reciprocating oscillating motion.

[0011] According to one embodiment of the present invention, the housing is provided with a fluid interface, which is used to introduce or discharge high-pressure fluid into the test chamber.

[0012] According to one embodiment of the present invention, the detection device further includes a sensor, which is connected to the test chamber and is used to monitor the pressure or fluid concentration inside the test chamber.

[0013] According to one embodiment of the present invention, an annular groove is provided on the outer peripheral surface of the second rotating shaft section, and the annular groove is used to install the sealing ring to be tested.

[0014] According to the seal ring detection device based on a self-tightening shaft provided in this utility model embodiment, when replacing the seal ring of a traditional integral shaft, the entire shaft needs to be pulled out of the housing, and components such as the drive mechanism and sealing bearing need to be disassembled during the process, which is cumbersome and time-consuming. The seal ring detection device based on a self-tightening shaft adopts a split shaft design, which only requires disassembling the locking part and separating the second shaft section to replace the seal ring. The connection between the first shaft section and the drive mechanism and sealing bearing does not need to be changed, which is especially suitable for rapid detection of batch seal rings. When the integral shaft is pulled out or assembled, the inner side of the high-pressure chamber is prone to friction with the seal, resulting in bearing wear and seal torsion. The second shaft section of the seal ring detection device based on a self-tightening shaft is small in size and light in weight, and there is no need to touch the drive mechanism during disassembly and assembly, which can significantly reduce the operation steps. At the same time, the split structure avoids the installation deviation caused by the heavy weight of the integral shaft, reduces the labor intensity of operators, and reduces equipment collision damage caused by operational errors. The rotating shaft assembly drives the sealing ring to rotate. In a high-pressure fluid environment, it can accurately simulate the actual working state of sealing rings in equipment such as high-pressure hydrogen valves and hydrogen storage tanks. Compared to static sealing tests, it better reflects the sealing performance of the sealing ring under dynamic friction and pressure fluctuations, avoiding the misjudgment of static compliance but dynamic leakage. This provides more realistic data support for sealing ring selection and quality control. By replacing the second rotating shaft section with different sizes, different specifications of rubber O-rings can be accommodated without replacing the first rotating shaft section and the housing, reducing equipment investment. Furthermore, the second rotating shaft section has low manufacturing costs; even if it wears out due to long-term use, only a single section needs to be replaced, without scrapping the entire rotating shaft assembly, reducing maintenance costs. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a schematic perspective view of the rotating shaft assembly provided by this utility model.

[0017] Figure 2 This is a schematic perspective view of the first rotating shaft segment provided by this utility model.

[0018] Figure 3 This is a schematic perspective view of the second rotating shaft segment provided by this utility model.

[0019] Figure 4 This is a schematic perspective view of the locking component provided by this utility model.

[0020] Figure 5This is a schematic cross-sectional view of the sealing ring detection device based on a self-tightening rotating shaft provided by this utility model.

[0021] Figure label: 100. First rotating shaft section; 102. Second rotating shaft section; 104. Locking element; 106. Protrusion; 108. Groove; 110. Fluid interface; 112. Annular groove; 114. Housing; 116. Right fixing bracket; 118. Gear shaft; 120. Left fixing bracket. Detailed Implementation

[0022] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are for illustrative purposes only and should not be construed as limiting the scope of this utility model.

[0023] like Figures 1 to 5 As shown, this utility model embodiment provides a sealing ring detection device based on a self-tightening rotating shaft, comprising: Housing 114 defines a test chamber for accommodating the sealing ring to be tested; A rotating shaft assembly is rotatably disposed within the housing 114. The rotating shaft assembly includes: The first rotating shaft section 100 is at least partially located outside the test chamber; The second rotating shaft section 102 is configured to mount the seal ring to be tested and is at least partially located inside the test chamber. The first rotating shaft section 100 is detachably connected to the second rotating shaft section 102. Locking member 104 is used to lock the first rotating shaft section 100 and the second rotating shaft section 102 after they are connected to prevent them from moving relative to each other.

[0024] According to the sealing ring detection device based on a self-tightening shaft provided in this embodiment, when replacing the sealing ring of a traditional integral shaft, the entire shaft needs to be pulled out of the housing 114. During this process, components such as the drive mechanism and the sealing bearing need to be disassembled, which is cumbersome and time-consuming. The sealing ring detection device based on a self-tightening shaft, through its split shaft design, only requires disassembling the locking part 104 and separating the second shaft section 102 to replace the sealing ring. The connection between the first shaft section 100 and the drive mechanism and the sealing bearing does not need to be changed, which is especially suitable for the rapid detection of batch sealing rings. When the integral shaft is pulled out or assembled, the inner side of the high-pressure chamber is prone to friction with the seal, resulting in bearing wear and seal torsion. The second shaft section of the sealing ring detection device based on a self-tightening shaft is small in size and light in weight. It does not require touching the drive mechanism during disassembly and assembly, which can significantly reduce the operation steps. At the same time, the split structure avoids the installation deviation caused by the heavy weight of the integral shaft, reduces the labor intensity of operators, and reduces equipment collision damage caused by operational errors. The rotating shaft assembly drives the sealing ring to rotate. In a high-pressure fluid environment, it can accurately simulate the actual working state of the sealing rings in equipment such as high-pressure hydrogen valves and hydrogen storage tanks. Compared to static sealing tests, it better reflects the sealing performance of the sealing ring under dynamic friction and pressure fluctuations, avoiding the misjudgment of static compliance but dynamic leakage. This provides more realistic data support for sealing ring selection and quality control. By replacing the second rotating shaft section 102 with different sizes, different specifications of rubber O-rings can be accommodated without replacing the first rotating shaft section 100 and the housing 114, reducing equipment investment. At the same time, the second rotating shaft section 102 has low manufacturing cost; even if it wears out due to long-term use, only a single section needs to be replaced, without scrapping the entire rotating shaft assembly, reducing maintenance costs.

[0025] Please continue reading Figures 1 to 5 The sealing ring testing device based on a self-tightening rotating shaft provided in this utility model embodiment addresses the sealing performance testing requirements of rubber O-rings under high-pressure hydrogen environment. Through the design of a split rotating shaft and self-tightening locking, it solves the problems of cumbersome disassembly and assembly and low maintenance efficiency of traditional integral rotating shafts.

[0026] Specifically, the housing 114 is a cylindrical or square rigid metal structure with high pressure resistance. It is integrally formed by welding or bolting to ensure no leakage. The interior of the housing 114 is enclosed by side walls and end caps to form an independent test chamber. The volume of the test chamber is adapted to the dimensions of the second rotating shaft section 102 and the sealing ring under test, and can accommodate high-pressure fluid. The side walls or end caps of the housing 114 have through holes for the rotating shaft assembly, within which a sealed bearing is installed. This ensures smooth rotation of the rotating shaft assembly while preventing leakage of high-pressure fluid from the test chamber. Furthermore, the housing 114 also has a pre-installed fluid interface 110 and a sensor interface for introducing high-pressure fluid and monitoring environmental parameters within the chamber, respectively.

[0027] The rotating shaft assembly has a two-section structure and can be quickly assembled and disassembled through a detachable connection. Its core function is to drive the seal ring under test to rotate, simulating the dynamic sealing scenario under actual working conditions. The first rotating shaft section 100 is a solid metal shaft made of the same material as the housing 114. It has a stepped shape, with one end extending outside the housing 114 for connecting to the drive mechanism; the other end has a mating structure for detachable connection to the second rotating shaft section 102. The length design of the first rotating shaft section 100 ensures that at least part of it is located outside the test chamber, avoiding direct contact with the high-pressure fluid inside the chamber and reducing the risk of corrosion.

[0028] The second rotating shaft section 102 is also a solid metal shaft, shorter than the first rotating shaft section 100. One end has an annular groove 112 on its outer circumference for embedding the sealing ring to be tested. The cross-sectional dimensions of the annular groove 112 are adapted to the sealing ring, ensuring that the outer circumference of the sealing ring can tightly fit against the inner wall of the test chamber or the sealing surface of the housing 114 after installation. The other end has a mating structure adapted to the first rotating shaft section 100, allowing for precise mating. The second rotating shaft section 102 is at least partially located inside the test chamber, with the mounting end completely placed within the chamber, ensuring that the sealing ring is in a high-pressure fluid environment.

[0029] The locking element 104 is an independent locking component used to restrict the relative movement of the first rotating shaft section 100 and the second rotating shaft section 102 after they are mated, ensuring that the rotating shaft assembly rotates without loosening. The structure of the locking element 104 is adapted to the mating structure of the rotating shaft section. For example, if the rotating shaft section has a boss and cavity mating, the locking element 104 can be a locking pin, inserted into the assembly gap at the mating point; if it is a threaded mating, the locking element 104 can be a lock nut; if it is a convex-concave interlocking mating, the locking element 104 can be a ring clamp. Regardless of the form, the locking element 104 features convenient installation, reliable locking, and quick disassembly, and can be operated without complicated tools.

[0030] The workflow of the sealing ring detection device based on a self-tightening rotating shaft provided in this embodiment of the invention is roughly as follows: Sealing ring installation stage: Separate the first rotating shaft section 100 and the second rotating shaft section 102, and take out the second rotating shaft section 102 separately; The sealing ring to be tested is embedded in the annular groove 112 of the second rotating shaft section 102 to ensure that the sealing ring is not twisted or offset. The second shaft section 102, with the sealing ring assembled, is inserted into the test cavity of the housing 114 and connected to the first shaft section 100 through a docking structure. The locking element 104 is then installed to lock the shaft assembly, thus completing the assembly of the shaft assembly.

[0031] Test preparation phase: Close the end cap of housing 114 to ensure the test chamber is sealed; introduce high-pressure fluid into the test chamber through fluid interface 110 until the preset test pressure is reached; The drive mechanism is activated, and the first rotating shaft section 100 drives the second rotating shaft section 102 to rotate synchronously. The sealing ring under test rotates with the second rotating shaft section 102, forming a dynamic seal with the inner wall of the test chamber.

[0032] Test execution and termination phases: The pressure and fluid concentration in the test chamber are monitored in real time by sensors to determine whether the sealing ring is leaking. After the test is completed, release the pressure in the test chamber, remove the locking part 104, separate the first and second rotating shaft sections 102, take out the second rotating shaft section 102 and replace the sealing ring, and prepare for the next test.

[0033] According to one embodiment of the present invention, after the first rotating shaft section 100 and the second rotating shaft section 102 are connected, an assembly gap is formed, and the locking member 104 is a locking pin, which is configured to be inserted into the assembly gap.

[0034] In one embodiment of this utility model, the connecting end of the first rotating shaft segment 100 is provided with a boss, and the connecting end of the second rotating shaft segment 102 is provided with a cavity adapted to the boss. After the boss is inserted into the cavity, an annular or strip-shaped assembly gap is formed between the sidewalls of the two. The locking pin is a cylindrical metal part with a smooth surface and a knob at one end for easy gripping. During assembly, the first rotating shaft segment 100 and the second rotating shaft segment 102 are aligned to fully expose the assembly gap. Then, the locking pin is inserted from the radial hole of the first rotating shaft segment 100, penetrating into the assembly gap and filling the gap space. After the locking pin is inserted, it is fixed by an interference fit with the hole wall or an additional retaining spring to prevent it from falling off when the rotating shaft assembly rotates. When disassembly is required, the first rotating shaft segment 100 and the second rotating shaft segment 102 can be separated simply by pulling out the locking pin.

[0035] After the locking pin is inserted into the assembly gap, it effectively restricts the radial and axial relative movement of the first rotating shaft section 100 and the second rotating shaft section 102, preventing loosening of the connection due to vibration during shaft assembly rotation, ensuring stable torque transmission, and not affecting the dynamic sealing test of the sealing ring. No complex tools are required; locking and unlocking of the rotating shaft section can be completed simply by inserting and removing the locking pin. Compared to the traditional disassembly process of integral rotating shafts, this significantly shortens the time for sealing ring replacement or equipment maintenance, improving testing efficiency. The assembly gap design can accommodate the mating of rotating shaft sections of different sizes. As long as the locking pin matches the gap size, reliable locking can be achieved without extensive modification of the rotating shaft section, reducing processing and adaptation costs.

[0036] According to one embodiment of the present invention, the locking pin is fixed to the first rotating shaft section 100 by threads.

[0037] In one embodiment of this utility model, the first rotating shaft segment 100 has a radially threaded hole that communicates with the assembly gap; the outer circumferential surface of the locking pin is machined with an external thread that precisely matches the internal threaded hole of the first rotating shaft segment 100. During assembly, after the first rotating shaft segment 100 and the second rotating shaft segment 102 are joined to form an assembly gap, the locking pin is screwed into the threaded hole of the first rotating shaft segment 100 until the end of the locking pin extends into the assembly gap and abuts against the side wall of the second rotating shaft segment 102. The locking pin is fixed by the thread engagement, and the abutting force between the locking pin and the second rotating shaft segment 102 further restricts the relative movement of the two rotating shaft segments. During disassembly, the locking pin is turned in the opposite direction to remove it from the threaded hole, thus separating the two rotating shaft segments. The outer end of the locking pin is also provided with an internal hexagonal or slotted groove for easy operation with a wrench or screwdriver.

[0038] Compared to interference fits or snap rings, threaded connections offer stronger anti-loosening capabilities. Even with prolonged high-speed rotation or vibration of the shaft assembly, the locking pin is less likely to loosen, ensuring a stable connection between the two shaft sections and improving the long-term reliability of the testing device. By adjusting the depth of the locking pin, its clamping force on the second shaft section 102 can be adjusted, ensuring a secure connection while preventing deformation of the shaft section due to excessive clamping, thus protecting the structural integrity of the shaft assembly. The self-locking characteristic of the thread prevents the locking pin from falling off without external force, making it particularly suitable for high-pressure and dynamic testing scenarios, avoiding equipment failure or test interruption due to locking pin detachment.

[0039] According to one embodiment of the present invention, the first shaft segment 100 and the second shaft segment 102 are connected by an interlocking connection structure, which is used to transmit torque and bear axial load.

[0040] In one embodiment of this utility model, the interlocking connection structure is a concave-convex fit structure, ensuring that the two rotating shaft segments can rotate synchronously after docking to transmit torque. Specifically, the connecting end face of the first rotating shaft segment 100 is provided with a plurality of rectangular protrusions 106 evenly distributed along the circumference, and the height and width of the protrusions 106 are adapted to the size of the grooves 108 of the second rotating shaft segment 102; the connecting end face of the second rotating shaft segment 102 is provided with rectangular grooves 108 corresponding one-to-one with the protrusions 106, and the depth of the grooves 108 is slightly greater than the height of the protrusions 106, ensuring that the protrusions 106 can be completely embedded in the grooves 108. During docking, the protrusion 106 of the first rotating shaft section 100 is aligned with the groove 108 of the second rotating shaft section 102, and axially pushed to make the protrusion 106 embed into the groove 108, forming an engagement. At this time, the two rotating shaft sections transmit torque through the contact between the protrusion 106 and the side wall of the groove 108. When the first rotating shaft section 100 rotates under the drive mechanism, it can drive the second rotating shaft section 102 to rotate synchronously through the engagement structure without relative slippage.

[0041] The interlocking structure transmits torque and bears axial loads through surface contact. Compared to traditional keyed or pinned connections, it has a larger contact area, allowing for the transmission of greater torque and a corresponding increase in axial load capacity. This prevents damage to the connection points due to excessive torque and is suitable for testing scenarios involving high-speed rotation or heavy loads on shaft assemblies. The precise fit between the protrusion 106 and the groove 108 ensures high coaxiality after the two shaft segments are joined, preventing shaft rotation jamming or seal wear caused by axial misalignment. This ensures the seal remains in the preset sealing position throughout the test, improving the accuracy of the test results. The interlocking structure achieves torque transmission without the need for additional fasteners. During connection, simply align the interlocking structure and push it in; during separation, simply pull it axially. This simple operation does not damage the shaft surface and extends the component's lifespan.

[0042] According to one embodiment of the present invention, the interlocking connection structure includes: A protrusion 106 is formed in one of the first pivot section 100 and the second pivot section 102; The groove 108 is adapted to the protrusion 106, and the groove 108 is formed in another of the first rotating shaft segment 100 and the second rotating shaft segment 102.

[0043] In one embodiment of this utility model, the protrusion 106 is a trapezoidal structure, formed on the outer peripheral surface of the connecting end of the first rotating shaft segment 100, and extends axially; the groove 108 is a trapezoidal groove adapted to the protrusion 106, formed on the inner wall of the connecting end of the second rotating shaft segment 102, and opened axially. The two sides of the protrusion 106 are inclined surfaces, and the two sides of the groove 108 fit against the inclined surfaces of the protrusion 106, ensuring a tight, gapless fit. During assembly, the protrusion 106 of the first rotating shaft segment 100 is aligned with the groove 108 of the second rotating shaft segment 102 and inserted axially until the protrusion 106 is fully embedded in the groove 108. At this time, the two rotating shaft segments are engaged by the side interlocking of the trapezoidal concave-convex structure, restricting relative rotation and achieving torque transmission. Furthermore, a small gap is reserved between the top of the protrusion 106 and the bottom of the groove 108 to avoid assembly jamming due to processing errors, while not affecting the torque transmission effect.

[0044] The trapezoidal concave-convex structure has a large side contact area, and the inclined surface has a certain self-locking characteristic, which can effectively prevent relative slippage between the two shaft sections when transmitting torque, ensuring synchronous rotation of the shaft assembly. It is especially suitable for scenarios with high requirements for speed stability in dynamic sealing tests. Compared with the rectangular structure, the trapezoidal structure has lower requirements for machining dimensional accuracy. Minor dimensional errors can be compensated by the contact of the inclined surface, reducing machining difficulty. At the same time, axial insertion assembly does not require precise alignment in the circumferential direction, improving assembly efficiency and reducing operational errors. The root width of the trapezoidal protrusion 106 is greater than that of the top, which has strong shear resistance and can withstand large torque impacts, avoiding breakage of the protrusion 106 due to torque fluctuations and extending the service life of the shaft assembly.

[0045] According to one embodiment of the present invention, one end of the first rotating shaft segment 100 is configured to connect to a drive mechanism to drive the rotating shaft assembly to rotate.

[0046] In one embodiment of this utility model, the end of the first rotating shaft section 100 away from the second rotating shaft section 102 is provided with a connecting flange or coupling. The connecting flange has evenly distributed bolt holes and is fixedly connected to the output shaft flange of the drive mechanism via bolts. If a coupling is used, it is an elastic coupling, with one end interference-fitted with the first rotating shaft section 100 and the other end interference-fitted with the output shaft of the drive mechanism. A flexible element compensates for minor coaxiality errors between the two shafts. The drive mechanism is a motor, fixed to the equipment frame. The axis of the motor output shaft coincides with the axis of the rotating shaft assembly, ensuring no additional radial force during drive. When the drive mechanism starts, the output shaft drives the first rotating shaft section 100 to rotate, which in turn drives the second rotating shaft section 102 to rotate synchronously through a meshing connection structure. This, in turn, causes the test sealing ring in the test chamber to rotate with the shaft, simulating the actual working conditions of the sealing ring.

[0047] Servo motors can precisely control speed and rotation angle to meet the needs of different testing conditions, ensuring that the sealing rings are tested under preset dynamic conditions, thus improving the relevance and accuracy of the test results. By driving the rotating shaft assembly, the dynamic working state of the sealing rings in actual equipment can be simulated. Compared with static testing, this more realistically reflects the sealing performance of the sealing rings and avoids performance deviations between static testing and actual applications. The flange or flexible coupling connection method ensures stable power transmission between the drive mechanism and the rotating shaft assembly. The flexible coupling can also compensate for installation errors, prevent vibrations from the drive mechanism from being transmitted to the rotating shaft assembly, reduce interference with the sealing state of the sealing rings, and ensure reliable test data.

[0048] According to one embodiment of the present invention, the drive mechanism is configured to drive the rotating shaft assembly to perform reciprocating oscillating motion.

[0049] In one embodiment of this utility model, the drive mechanism includes a servo motor and a swing control module. The swing control module is electrically connected to the servo motor and can preset the swing angle range (e.g., 0°-90°, 0°-180°) and swing frequency. The drive mechanism is connected to the first rotating shaft section 100 via a coupling. When the swing mode is activated, the servo motor, under the control of the swing control module, drives the rotating shaft assembly to reciprocate within the preset angle range (e.g., rotating from 0° to 90°, then rotating back to 0°, repeating cyclically). During the swing process, the motor speed can be uniform or change according to a preset curve, simulating the intermittent or reciprocating motion of the rotating shaft in actual equipment. Simultaneously, the drive mechanism is also equipped with an angle sensor to monitor the swing angle of the rotating shaft assembly in real time and feed it back to the control module to ensure swing accuracy.

[0050] Compared to continuous rotation in one direction, reciprocating rotation more closely resembles the actual working scenario of sealing rings, enabling the detection of changes in sealing performance during repeated starts, stops, and rotations, thus improving the comprehensiveness of the test. During reciprocating rotation, the contact state between the sealing ring and the sealing surface changes periodically, making it easier to expose defects that are difficult to detect in static testing, ensuring that the test results truly reflect the long-term reliability of the sealing ring. The rotation control module allows adjustment of the rotation angle, frequency, and speed to adapt to the testing needs of sealing rings of different specifications, without requiring changes to the drive mechanism, thus improving the device's versatility.

[0051] According to one embodiment of the present invention, a fluid interface 110 is provided on the housing 114, which is used to introduce or discharge high-pressure fluid into the test chamber.

[0052] In one embodiment of this utility model, there are two fluid interfaces 110, respectively located on the upper and lower parts of the side wall of the housing 114: the upper interface is an air inlet or liquid inlet, connected to a high-pressure fluid source via a high-pressure pipeline, which is equipped with a shut-off valve and a pressure regulating valve to control the fluid flow and pressure; the lower interface is an exhaust port or drain port, connected to a recovery device or venting system via a pipeline, which is equipped with a check valve and a pressure relief valve to prevent fluid backflow or excessive pressure. The inner wall of the fluid interface 110 is machined with internal threads, which are sealed to the external threaded joint of the pipeline. Sealing tape or sealing rings are wrapped around the joint to ensure no leakage under high pressure. When it is necessary to introduce high-pressure fluid into the test chamber, the shut-off valve of the air / liquid inlet is opened and the pressure is adjusted to a preset value; after the test is completed, the pressure relief valve of the exhaust / drain port is opened to discharge the fluid in the test chamber to the recovery device or for safe venting.

[0053] By introducing high-pressure fluid, the working environment of the sealing ring in actual high-pressure equipment can be simulated, and its sealing performance under high pressure can be tested. This ensures that the test results meet the actual application requirements and avoids performance misjudgments caused by low-pressure testing. The cooperation between the pressure regulating valve and the pressure relief valve can precisely control the pressure in the test chamber, preventing excessive pressure from damaging the housing 114 or causing fluid leakage. The design of the one-way valve and sealing joint can prevent fluid backflow or leakage, ensuring the safety of operators and equipment, and is especially suitable for testing scenarios involving flammable and explosive fluids. By changing the fluid source, different types of fluids can be introduced to test the sealing ring's adaptability to different media, improving the versatility of the device and meeting the testing needs of multiple scenarios.

[0054] According to one embodiment of the present invention, the device further includes a sensor that is connected to the test chamber and is used to monitor the pressure or fluid concentration inside the test chamber.

[0055] In one embodiment of this invention, the sensor includes a pressure sensor and a fluid concentration sensor: the pressure sensor is mounted on the side wall of the housing 114 via a threaded interface, with its probe extending into the test chamber to monitor the fluid pressure in real time and output a pressure electrical signal; the fluid concentration sensor is mounted on the top interface of the housing 114, with its probe contacting the fluid in the test chamber to detect the concentration of a specific fluid and output a concentration electrical signal. Both sensors are connected to the device's control system via wires. The control system receives and displays the sensor data in real time and presets safety thresholds. If the pressure sensor detects an abnormal drop in pressure within the chamber, or the fluid concentration sensor detects an abnormal concentration, the control system immediately triggers an audible and visual alarm and can automatically close the shut-off valve of the fluid interface 110 to terminate the test.

[0056] Pressure sensors can quickly detect pressure drops caused by seal leaks, while fluid concentration sensors can detect minute fluid leaks. Compared to manual observation, this allows for earlier and more accurate detection of sealing defects, preventing safety accidents or distorted data due to leak expansion. When a leak is detected, the control system promptly alarms and stops the test, preventing large-scale leakage of high-pressure fluids and protecting the safety of operators and equipment, making it particularly suitable for detecting high-risk fluids. The pressure and concentration change curves recorded by the sensors can serve as a basis for analyzing the sealing performance of the seal, helping to determine its service life and reliability, and providing data support for subsequent product improvements.

[0057] According to one embodiment of the present invention, an annular groove 112 is provided on the outer peripheral surface of the second rotating shaft section 102, and the annular groove 112 is used to install the sealing ring to be tested.

[0058] In one embodiment of this utility model, an annular groove 112 is formed on the outer peripheral surface of the second rotating shaft section 102 located inside the test chamber. The structural dimensions of the groove are the groove parameters of the sealing structure to be tested, ensuring that after the sealing ring is embedded in the groove, the outer peripheral surface can fit tightly against the inner wall of the housing 114 to form a seal. The number of annular grooves 112 can be set according to the test requirements. If there are two, they are arranged at intervals along the axial direction of the second rotating shaft section 102, and two sealing rings can be installed simultaneously for comparative testing or double sealing testing. The bottom and sidewalls of the annular groove 112 are smoothed to avoid sharp edges scratching the sealing ring; the two ends of the groove are chamfered to facilitate the smooth embedding of the sealing ring during installation, reducing installation resistance and damage to the sealing ring.

[0059] The annular groove 112 fixes the sealing ring in a preset sealing position, preventing axial movement or displacement of the sealing ring during testing. This ensures stable contact between the sealing ring and the sealing surface, improving the accuracy and repeatability of the test results. The smooth groove walls and chamfered design reduce frictional damage during sealing ring installation and rotation, preventing deformation or scratches caused by improper installation. This ensures that the original performance of the sealing ring is being tested without introducing additional damaging factors. By replacing the second rotating shaft section 102 with different groove widths and depths, sealing rings of different cross-sectional sizes can be accommodated without replacing the entire rotating shaft assembly, reducing equipment investment costs and improving the device's versatility. Furthermore, the multi-annular groove 112 design allows for simultaneous testing of multiple sealing rings, improving testing efficiency.

[0060] The testing method of the sealing ring detection device based on a self-tightening rotating shaft provided in this embodiment of the invention is roughly as follows: During assembly, the second rotating shaft section 102, pre-sealed, is first inserted into the mounting hole of the test chamber from one side. Then, the first rotating shaft section 100, also sealed, is aligned with the second rotating shaft section 102 from the other side of the test chamber, ensuring accurate engagement and relative rotation between them via an interlocking connection structure. After the first and second rotating shaft sections 100 and 102 are properly aligned, the locking member 104 is inserted into the assembly gap formed by their alignment, completing the assembly. At this point, the entire rotating shaft assembly becomes a rigid unit, effectively transmitting the swing driving torque and achieving high-pressure sealing through its outer seals. For disassembly, simply remove the locking member 104 to easily separate the first and second rotating shaft sections 100 and 102.

[0061] The right fixed bracket 116 and its gear shaft 118 are moved to the right-side rotating locking pin, and the gear shaft 118 is connected to the locking element 104 and other structures to form a fastening structure capable of transmitting torque and axial force. The power input for the rotation of the test bench comes from the gear shaft 118. Finally, the left fixed bracket 120 is moved to the side of the test sealing ring in the test chamber and connected using the designed flange structure. A sealed cavity is formed between the left fixed bracket 120 and the test sealing ring, and the sealing performance of the test sealing ring can be evaluated by the pressure and concentration changes in this cavity.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A sealing ring detection device based on a self-tightening rotating shaft, characterized in that, include: A housing that defines a test chamber for accommodating a sealing ring to be tested; A pivot assembly rotatably disposed within the housing, the pivot assembly comprising: A first rotating shaft section (100) is located at least partially outside the test cavity; The second rotating shaft section (102) is configured to mount the seal ring to be tested and is at least partially located inside the test chamber, and the first rotating shaft section (100) and the second rotating shaft section (102) are detachably connected. A locking member (104) is used to lock the first rotating shaft segment (100) and the second rotating shaft segment (102) after they are connected to prevent them from moving relative to each other.

2. The sealing ring detection device based on a self-tightening rotating shaft according to claim 1, characterized in that, After the first rotating shaft section (100) and the second rotating shaft section (102) are connected, an assembly gap is formed. The locking member (104) is a locking pin, which is configured to be inserted into the assembly gap.

3. The sealing ring detection device based on a self-tightening rotating shaft according to claim 2, characterized in that, The locking pin is fixed to the first rotating shaft section (100) by threads.

4. The sealing ring detection device based on a self-tightening rotating shaft according to claim 1, characterized in that, The first shaft segment (100) and the second shaft segment (102) are connected by an interlocking connection structure, which is used to transmit torque and bear axial load.

5. The sealing ring detection device based on a self-tightening rotating shaft according to claim 4, characterized in that, The interlocking connection structure includes: A protrusion (106) is formed in one of the first pivot segment (100) and the second pivot segment (102); A groove (108) is adapted to the protrusion (106), the groove (108) being formed in the other of the first pivot segment (100) and the second pivot segment (102).

6. The sealing ring detection device based on a self-tightening rotating shaft according to claim 1, characterized in that, One end of the first rotating shaft segment (100) is configured to connect to a drive mechanism to drive the rotating shaft assembly to rotate.

7. The sealing ring detection device based on a self-tightening rotating shaft according to claim 6, characterized in that, The drive mechanism is configured to drive the rotating shaft assembly to perform a reciprocating oscillating motion.

8. The sealing ring detection device based on a self-tightening rotating shaft according to any one of claims 1 to 7, characterized in that, The housing is provided with a fluid interface (110), which is used to introduce or discharge high-pressure fluid into the test chamber.

9. The sealing ring detection device based on a self-tightening rotating shaft according to any one of claims 1 to 7, characterized in that, The detection device also includes a sensor that is connected to the test chamber and is used to monitor the pressure or fluid concentration inside the test chamber.

10. The sealing ring detection device based on a self-tightening rotating shaft according to any one of claims 1 to 7, characterized in that, An annular groove (112) is provided on the outer circumferential surface of the second rotating shaft section (102), and the annular groove (112) is used to install the sealing ring to be tested.

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