Integrated end-face sealing test device and test method

Abstract

This invention relates to the technical field of sealing performance testing devices, and more particularly to a centralized end-face sealing testing device and method. The device includes a substrate and a medium liquid channel capable of receiving a medium liquid and reaching a predetermined pressure to test the sealing performance of the sealing assembly. Its advantages include enabling testing of sealing assemblies, ensuring that the sealing performance and service life of the sealing assembly can be clearly determined before installation on a product, thus improving product quality reliability. Furthermore, this fixture only requires changing the cover plate to test sealing assemblies of various specifications, achieving centralized end-face sealing testing, increasing the confidence of test results, improving fixture reusability, accelerating the testing cycle, reducing testing costs, and significantly improving testing efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of sealing performance testing devices, and more particularly to an integrated end-face sealing testing device and testing method. Background Technology

[0002] In the testing methods for end face seals used in aviation, the common approach is to directly install the end face seals onto the product and conduct comprehensive environmental testing of the product's performance. However, at present, the problem of leaks and drips from the seals on the product is frequent, and there is a lack of component-level testing processes for end face seals used in aviation. As a result, it is impossible to determine the actual sealing performance of the end face seals, and it is impossible to obtain the service life and quality inspection results of the seals before they are installed on the product, which affects the reliability of aviation hydraulic products.

[0003] Furthermore, there are many specifications of end face seals used in aviation hydraulic systems. If tests are carried out on each of the different specifications, problems such as long processing cycles for test tooling, high costs, and low tooling reuse rates will be encountered, which will greatly reduce the efficiency of testing end face seals for aviation and affect the delivery schedule of aviation products. Summary of the Invention

[0004] Technical problems to be solved

[0005] In view of the above-mentioned shortcomings and deficiencies of the prior art, the present invention provides an integrated end-face sealing test device and test method, which solves the technical problem that the service life and quality of the seal cannot be checked before the seal is installed on the product, thus affecting the reliability of aviation hydraulic products.

[0006] Technical solution

[0007] To achieve the above objectives, the main technical solutions adopted by the present invention include:

[0008] In a first aspect, the present invention provides a compact end-face sealing test device for testing the sealing performance of a sealing assembly. The sealing assembly includes a sealing ring and a cover plate. The compact end-face sealing test device includes a substrate. The substrate has a medium liquid channel, the outlet end of which extends to the surface of the substrate, and a test area is formed on the surface of the substrate corresponding to the outlet end of the medium liquid channel. The cover plate is detachably connected to the test area. When the cover plate is detachably connected to the test area, the sealing ring is located between the cover plate and the test area to establish a seal between the cover plate and the test area, thereby sealing the outlet end of the medium liquid channel. The medium liquid channel can be connected to a liquid supply device to input medium liquid into the medium liquid channel and reach a predetermined pressure, thereby testing the sealing performance of the sealing assembly.

[0009] In one technical solution of the present invention, there are multiple corresponding sealing components and test areas; the medium liquid channel includes a main channel and multiple branch channels, one end of each branch channel is connected to the main channel; one end of the main channel is the inlet end of the medium liquid channel, and the other end of the multiple branch channels forms the outlet end of the corresponding medium liquid channel, so as to form multiple independent test areas on the surface of the substrate.

[0010] In one technical solution of the present invention, a valve is also provided on the branch passage and used to open and close the branch passage.

[0011] In one embodiment of the present invention, an annular groove for installing a sealing ring is provided on the cover plate. A medium liquid collection tank is provided on the area, corresponding to the outer periphery of the annular groove, to collect the medium liquid leaked due to sealing ring failure.

[0012] In one technical solution of the present invention, a medium liquid outlet is provided on one side of the medium liquid receiving tank, and the medium liquid outlet can discharge the medium liquid in the medium liquid receiving tank.

[0013] In one technical solution of the present invention, a positive pressure module is fixedly connected to the substrate and is located on the other side of the medium liquid receiving tank. When the positive pressure module is working, positive pressure gas is input into the medium liquid receiving tank so that the medium liquid in the medium liquid receiving tank is output from the medium liquid outlet.

[0014] In one technical solution of the present invention, a liquid collection tank is provided on one side of the substrate, so that when the medium liquid in the medium liquid receiving tank is output from the medium liquid outlet, it can fall into the liquid collection tank; a display panel is also provided in the liquid collection tank; when the medium liquid comes into contact with the display panel, the display panel is wetted to highlight the display medium liquid.

[0015] In one embodiment of the present invention, the sealing component is an aerospace end-face sealing component.

[0016] Secondly, the present invention provides a testing method for a compact end-face sealing testing device, applied to the compact end-face sealing testing device in the above-mentioned technical solution, the method comprising:

[0017] S1: The cover plate with the sealing ring is detachably and fixedly connected to the test area to establish a seal between the cover plate and the test area, thereby sealing the outlet end of the medium liquid channel;

[0018] S2: Introduce medium liquid into the medium liquid channel and bring it to a predetermined pressure;

[0019] S3: Based on the pressure of the medium liquid channel reaching the predetermined pressure, test the sealing condition between the outlet end of the medium liquid channel and the cover plate.

[0020] Beneficial effects

[0021] The beneficial effects of this invention are as follows: On the one hand, this technical solution enables testing of sealing components, ensuring that the sealing performance and service life of the sealing components can be clearly determined before they are installed on the product, thereby improving product quality reliability. On the other hand, this tooling only requires changing the cover plate to test sealing components of various specifications, achieving intensive end-face sealing testing, improving the confidence of test results, increasing tooling reuse rate, accelerating the testing cycle, reducing testing costs, and greatly improving testing efficiency.

[0022] This fixture design allows for independent testing of sealing performance at the component level, rather than relying on complete product assembly. This effectively enables quality screening of sealing components before formal assembly. By pre-testing the sealing rings before actual use, the risks of product rework, on-site leaks, and even safety accidents caused by sealing failure can be significantly reduced, thereby improving the reliability and safety of the final product from the source. Furthermore, since the base structure remains unchanged, only the appropriate cover plate and sealing ring need to be replaced according to the size and interface type of the sealing component, enabling rapid switching tests for different specifications and models of sealing components. This modular design greatly improves the versatility and reusability of the fixture, avoiding the resource waste and management complexity associated with developing dedicated testing equipment for each sealing component in traditional solutions.

[0023] Furthermore, this testing fixture features a simple structure and convenient operation, allowing for standardized testing processes and good data repeatability. This facilitates the establishment of a unified evaluation system and enhances the confidence and comparability of test results. Since it eliminates the need for repeated disassembly and reassembly of the entire machine or simulation of complex system environments, test preparation time is significantly shortened, the testing cycle is compressed, and the progress of new product development and sealing solution iteration is accelerated. In batch testing scenarios, the fixture's efficiency is particularly outstanding, enabling centralized testing of multiple batches and specifications of sealing components within a limited space, achieving intensive utilization of testing resources. Overall, this technical solution not only reduces the development and maintenance costs of testing equipment but also improves testing efficiency and quality control levels, demonstrating significant economic benefits and engineering application value. Attached Figure Description

[0024] Figure 1 This is one of the main view structural schematic diagrams of the integrated end-face sealing test device of the present invention;

[0025] Figure 2 For the present invention Figure 1 One of the schematic diagrams of the top-view cross-section structure;

[0026] Figure 3 This is one of the structural schematic diagrams of the cover plate of the present invention;

[0027] Figure 4 For the present invention Figure 3A top-view cross-sectional structural diagram;

[0028] Figure 5 This is the second schematic diagram of the integrated end-face sealing test device of the present invention;

[0029] Figure 6 For the present invention Figure 5 A top-view cross-sectional structural diagram.

[0030] Explanation of reference numerals in the attached figures

[0031] 1: Matrix; 11: Test area; 12: Medium liquid collection tank; 13: Medium liquid outlet;

[0032] 2: Sealing assembly; 21: Sealing ring; 22: Cover plate; 221: Annular groove;

[0033] 100. Medium liquid channel; 101. Main channel; 102. Branch channel;

[0034] 3: Positive pressure module;

[0035] 4: Liquid collection tank;

[0036] 5: Display panel. Detailed Implementation

[0037] To better explain and facilitate understanding of this invention, the following description is provided in conjunction with the appendix. Figures 1-6 The present invention will be described in detail through specific embodiments. In this document, directional terms such as "upper" and "lower" are used interchangeably with other directional terms. Figure 1 The orientation is used as a reference.

[0038] Example 1:

[0039] Reference Figures 1-6 An embodiment of the present invention provides a compact end-face sealing test device for testing the sealing performance of a sealing component 2, the sealing component 2 including a sealing ring 21 and a cover plate 22; characterized in that the compact end-face sealing test device includes a base 1;

[0040] The substrate 1 has a medium liquid channel 100, the outlet end of the medium liquid channel 100 extends to the surface of the substrate 1, and a test area 11 is formed at the surface position of the substrate 1 corresponding to the outlet end of the medium liquid channel 100.

[0041] The cover plate 22 can be detachably connected to the test area 11;

[0042] When the cover plate 22 is detachably connected to the test area, the sealing ring 21 is located between the cover plate 22 and the test area 11 to establish a seal between the cover plate 22 and the test area 11, thereby sealing the outlet end of the medium liquid channel 100.

[0043] The medium liquid channel 100 can be connected to a liquid supply device to input medium liquid into the medium liquid channel 100 and reach a predetermined pressure, thereby testing the sealing performance of the sealing assembly 2.

[0044] This technical solution enables testing of the sealing component 2, ensuring its sealing performance and service life are clearly defined before installation on the product, thus improving product quality and reliability. Furthermore, this tooling allows for testing of various specifications of the sealing component 2 simply by replacing the cover plate 22, achieving streamlined end-face sealing testing, increasing the confidence level of test results, improving tooling reusability, accelerating the testing cycle, reducing testing costs, and significantly improving testing efficiency.

[0045] Specifically, the substrate 1 has a through-flow medium liquid channel 100 inside, and the outlet end of the channel extends directly to the surface of the substrate 1, forming a clearly defined test area 11 on the surface of the substrate 1 at the corresponding position. A cover plate 22 is detachably installed on the test area 11. A sealing ring 21 to be tested can be placed at the contact interface between the cover plate 22 and the test area 11, thereby forming an effective sealing connection between the outlet end of the medium liquid channel 100 and the cover plate 22. By inputting medium liquid into the medium liquid channel 100 and gradually pressurizing it to a preset test pressure, the sealing performance of the sealing ring 21 can be dynamically detected and evaluated under simulated actual working conditions, thereby determining whether leakage exists, whether its pressure resistance meets the standard, and its stability under continuous pressure.

[0046] The design of this fixture allows for independent testing of sealing performance at the component level, eliminating the need for complete product assembly. This effectively enables quality screening of the sealing component 2 before formal assembly. By pre-testing the sealing ring 21 before actual use, the risks of product rework, on-site leakage, and even safety accidents due to sealing failure can be significantly reduced, thereby improving the reliability and safety of the final product from the source. Furthermore, since the structure of the base 1 remains unchanged, only the appropriate cover plate 22 and sealing ring 21 need to be replaced according to the size and interface type of the sealing component 2, enabling rapid switching tests for different specifications and models of sealing components 2. This modular design significantly improves the versatility and reusability of the fixture, avoiding the resource waste and management complexity associated with developing dedicated testing equipment for each type of sealing component 2 in traditional solutions.

[0047] Furthermore, this testing fixture features a simple structure and convenient operation, allowing for standardized testing processes and good data repeatability. This facilitates the establishment of a unified evaluation system and enhances the confidence and comparability of test results. Since it eliminates the need for repeated disassembly and reassembly of the entire machine or simulation of complex system environments, test preparation time is significantly shortened, the testing cycle is compressed, and the progress of new product development and sealing solution iteration is accelerated. In batch testing scenarios, the fixture's efficiency is particularly outstanding, enabling centralized testing of multiple batches and specifications of sealing components within a limited space, achieving intensive utilization of testing resources. Overall, this technical solution not only reduces the development and maintenance costs of testing equipment but also improves testing efficiency and quality control levels, demonstrating significant economic benefits and engineering application value.

[0048] The cover plate 22 has an annular groove 221 for installing the sealing ring 21.

[0049] The annular groove 221 is located on the contact surface between the cover plate 22 and the test area 11 of the substrate 1. Its position corresponds to the outlet end of the medium liquid channel 100, and its shape matches the cross-section and contour of the sealing ring 21 to be tested. The annular groove 221 provides a stable installation position and limiting space for the sealing ring 21, effectively preventing the sealing ring 21 from shifting, twisting, or being crushed during assembly, and ensuring that it is in the correct and consistent stress position under pre-tightening. The annular groove 221 can be customized according to different sealing forms, such as O-rings, rectangular rings, star-shaped rings, etc., adjusting geometric parameters such as groove width, groove depth, and chamfer to adapt to sealing rings 21 with various cross-sectional sizes and material properties, further enhancing the versatility of the tooling.

[0050] By providing an annular groove 221 on the cover plate 22, the sealing ring 21 can be accurately pre-positioned before each test, which not only improves assembly efficiency and repeatability but also significantly enhances the consistency of the sealing interface. After the cover plate 22 is tightly pressed against the test area 11, the sealing ring 21 is subjected to controllable compression in the axial or radial direction, forming a reliable sealing interface. This accurately reflects the stress state and sealing capacity of the seal under actual working conditions, helping to avoid misjudgments caused by improper installation or uneven stress of the sealing ring 21, and improving the reliability and repeatability of the test results.

[0051] Furthermore, since the annular groove 221 is located on the replaceable cover plate 22, different specifications of sealing rings 21 can be equipped with cover plates 22 with different annular groove 221 structures. When it is necessary to change the test type, only the cover plate 22 with the pre-installed matching annular groove 221 needs to be replaced, without any adjustment to the substrate 1 or the medium liquid channel 100, which greatly simplifies the changeover operation process. This design not only lowers the technical threshold for operators, but also reduces the accumulation of errors caused by frequent disassembly and manual positioning, ensuring the standardization and normalization of the testing process for multiple batches and models of seals.

[0052] The substrate 1 can be configured as a cuboid structure, with the test area 11 located on the extended surfaces of the front and rear sides of the substrate 1. An inlet end of a medium liquid channel 100 is formed on a small end face of the substrate 1. Furthermore, a nozzle is detachably connected to the inlet end of the medium liquid channel 100, for example, by bolting it to the substrate 1. The nozzle is used to connect the medium liquid supply device and the medium liquid channel 100. The cover plate 22 can also be detachably and fixedly connected to the test area 11 by bolting.

[0053] The temperature of the medium liquid can be set to a variable form to simulate the actual working conditions of the sealing component 2 at different temperatures, thereby making the measurement results closer to the real results.

[0054] By adjusting the preload of the bolts connecting the cover plate 22 and the test area 11, the test conditions of the sealing assembly 2 can be made closer to the actual use of the sealing assembly 2, and the measurement results can be made closer to the actual results.

[0055] Example 2:

[0056] Reference Figures 1-6 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0057] The sealing assembly 2 and the test area 11 are corresponding multiple; the medium liquid channel 100 includes a main channel 101 and multiple branch channels 102, one end of each branch channel 102 is connected to the main channel 101; one end of the main channel 101 is the inlet end of the medium liquid channel 100, and the other end of the multiple branch channels 102 forms the outlet end of the corresponding medium liquid channel 100.

[0058] In this embodiment, the sealing component 2 and the test area 11 are designed as multiple corresponding structural units, integrated on the same substrate 1, thereby enabling simultaneous or independent testing of multiple sealing components 2.

[0059] The fluid channel 100 inside the substrate 1 adopts a fluid pathway layout combining a main trunk and branches, specifically including a common trunk channel 101 and multiple branch channels 102 branching from the trunk. One end of the trunk channel 101 serves as the inlet of the entire fluid channel 100, used to connect to an external pressure source or test fluid supply system, while one end of each branch channel 102 is connected to the trunk channel 101, ensuring that the test fluid can be evenly distributed from the main channel to each branch path. The other end of each branch channel 102 extends to different positions on the surface of the substrate 1, forming multiple independent outlets. The positions corresponding to these outlets constitute multiple distributed test areas 11.

[0060] Each test area 11 can be independently fitted with a cover plate 22, and a sealing ring 21 to be tested can be placed between the cover plate 22 and the test area 11, thus forming a complete sealing test unit. Through this multi-channel parallel structural design, multiple sealing components 2 can be pressurized and tested simultaneously during a single medium liquid input process, significantly improving the detection efficiency per unit time.

[0061] Furthermore, since the design of each branch channel 102 can maintain the consistency of parameters such as flow channel length and cross-sectional dimensions, the medium liquid pressure and flow conditions borne by each test area 11 are highly consistent, which effectively ensures the uniformity of working conditions and data comparability among multiple sets of tests, and further enhances the reliability and scientific nature of the test results.

[0062] In summary, by introducing a multi-branch medium liquid channel 100 and a multi-test area 11 in a coordinated layout, this fixture can significantly increase the test throughput without increasing additional equipment investment, and enhance the consistency and controllability of the test. It fully embodies the design concept of intensive, standardized and high-efficiency, and is suitable for quality control in mass production environment and performance comparison testing in the R&D stage.

[0063] Example 3:

[0064] Reference Figures 1-6 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0065] The integrated end-face sealing test device also includes a valve located on the branch channel 102 and used to open and close the branch channel 102.

[0066] In this embodiment, the valve enables each branch channel 102 to have independent opening and closing capabilities. The valve can be operated manually, pneumatically, or electrically, and is installed in the connection section between the branch channel 102 and the main channel 101 or in the flow path of the branch itself, to precisely control whether the test medium liquid flows into the corresponding branch and its end test area 11.

[0067] By setting valves, operators can flexibly select the number and location of sealing components 2 participating in the test according to actual testing needs, so as to pressurize and test one, multiple or all test areas 11 as needed.

[0068] For example, when only a specific specification or batch of seals needs to be tested, the valves of other branches can be closed, allowing the test medium to flow only to the target test area 11, avoiding unnecessary pressure or potential leakage risks to unused outlets. Simultaneously, if a sealing component 2 in a branch has a serious leak or malfunction, the corresponding valve can be closed to isolate it, preventing it from affecting the testing progress and pressure stability of other normal branches, thus ensuring the continuity and data accuracy of the overall testing system.

[0069] Furthermore, by combining the valve's step-by-step control strategy, complex testing procedures such as staged pressurization, pressure holding monitoring, or differential pressure comparison can be achieved. For example, some branches can be opened first for preliminary testing, and then the remaining branches can be gradually activated to evaluate the system's pressure response characteristics under multiple loads; or the opening and closing of valves can be used to make a horizontal comparison of the leakage rates of different sealing components 2, thereby obtaining richer performance data. This highly controllable testing mode provides more accurate data support for sealing material selection, assembly process optimization, and life prediction.

[0070] Because each branch has independent control capabilities, the applicability of the tooling in asymmetric testing scenarios is further enhanced. Even if the size, preload, or medium fluid tolerance level of the seals installed in different test areas 11 differs, differentiated pressure supply or staggered testing can be achieved through valve adjustment, avoiding mutual interference caused by sharing the medium fluid channel 100. This not only expands the application range of the tooling but also increases the reusability of the equipment in various scenarios such as R&D, quality inspection, and process testing.

[0071] In summary, by adding valves to branch channel 102, refined flow and pressure management of each test unit was achieved, upgrading the tooling from a passive parallel testing platform to an active and controllable intelligent testing system. This improvement not only enhances the safety, stability, and data quality of the testing process but also strengthens the equipment's flexibility and adaptability, enabling it to cope with more diverse and complex sealing test requirements. While ensuring testing accuracy, it maximizes the advantages of intensive design, further reducing unit testing costs and improving overall testing efficiency.

[0072] Example 4:

[0073] Reference Figures 1-6 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0074] The test area 11 is provided with a medium liquid collection tank 12, which is located on the outer periphery of the annular groove 221 to collect the medium liquid leaked by the sealing ring 21 due to sealing failure.

[0075] In this technical solution, the medium liquid collection tank 12 forms a liquid collection structure around the periphery of the sealing interface. When the cover plate 22 is pressed against the test area 11, and the sealing ring 21 is compressed to form a sealing interface, the medium liquid collection tank 12 does not directly participate in the sealing function, but serves as an interception and collection area for potential leakage paths.

[0076] If the sealing ring 21 experiences partial failure or minor leakage during the test, the test medium liquid escaping from the sealing interface will not directly leak to the outside of the tooling or pollute the surrounding environment. Instead, it will first be guided into the medium liquid collection tank 12 for temporary containment.

[0077] By setting up the medium liquid collection tank 12, the safety and controllability of the testing process are significantly improved. Especially when using high-pressure, high-temperature or corrosive and flammable test medium liquids, the medium liquid collection tank 12 can effectively prevent the disorderly diffusion of the medium liquid and reduce operational risks.

[0078] A medium liquid outlet 13 is provided on one side of the medium liquid receiving tank 12, which can discharge the medium liquid in the medium liquid receiving tank 12.

[0079] The medium liquid outlet 13 can effectively discharge the leaked medium liquid accumulated in the tank, realize the orderly discharge and subsequent treatment of the leaked material, so that the medium liquid receiving tank 12 not only has the ability to temporarily contain the leaked medium liquid, but also forms a complete leakage diversion and discharge channel, avoiding the problems of accumulation, corrosion or pressure rise caused by long-term retention of medium liquid in the tank.

[0080] With the installation of the medium liquid outlet 13, operators can visually observe or quantitatively measure the discharged medium liquid. For example, during liquid sealing tests, the leakage rate per unit time can be calculated by collecting the volume and time relationship of the discharged liquid, thus achieving a quantitative assessment of the degree of sealing performance degradation. In addition, this outlet can also be connected to online monitoring equipment, such as conductivity sensors, pH probes, or micro-droplet detectors, to achieve real-time analysis of the composition or state of the leaked medium liquid, further improving the level of intelligent detection.

[0081] By combining the aforementioned multi-branch independent control valves with the medium liquid collection system of each test zone 11, each test unit can achieve complete closed-loop management of "independent pressure supply - leak capture - directional discharge". When a leak occurs at a certain test point, the leaked medium liquid is discharged through a dedicated medium liquid outlet 13, preventing cross-flow with the fluid paths of other test zones 11, thus ensuring data independence and result reliability during multi-channel parallel testing. Simultaneously, by observing which test zone 11's medium liquid outlet 13 discharges medium liquid, the failure location can be quickly pinpointed, facilitating timely replacement of seals or adjustment of assembly processes, reducing downtime for troubleshooting.

[0082] In summary, the introduction of the medium liquid outlet 13 upgrades the function of the medium liquid receiving tank 12 from passive containment to active drainage, forming a complete leakage response mechanism. This design not only improves the safety margin and maintainability of the tooling in the event of seal failure, but also provides a physical channel for quantitative analysis of leakage and fault diagnosis, further enhancing the refined control capability and engineering practicality of the testing system, making the entire integrated end-face seal testing process safer, more efficient, accurate, and traceable.

[0083] Example 5:

[0084] Reference Figures 1-6 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0085] The integrated end-face sealing test device also includes a positive pressure module 3 fixedly connected to the base 1, located on the other side of the medium liquid receiving tank 12. When the positive pressure module 3 is working, it inputs positive pressure gas into the medium liquid receiving tank 12, so that the medium liquid in the medium liquid receiving tank 12 is output from the medium liquid outlet 13. The integrated end-face sealing test device also includes a liquid collection tank 4 located on one side of the base 1, so that when the medium liquid in the medium liquid receiving tank 12 is output from the medium liquid outlet 13, it can fall into the liquid collection tank 4.

[0086] In this embodiment, the positive pressure module 3 is connected to the inside of the collection tank via a gas path. When leaked medium liquid enters the medium liquid collection tank 12 during the test, the positive pressure module 3 can be activated to input controllable positive pressure gas into the collection tank. This positive pressure gas acts on the liquid surface in the collection tank, forming a directional pressure difference, which pushes the accumulated medium liquid in the tank to overcome flow resistance and smoothly discharge it through the pre-set medium liquid outlet 13. This active drainage mechanism effectively solves the problem of poor drainage caused by liquid viscosity, surface tension, or pipe bends, ensuring that leaked liquid can be completely and quickly discharged, avoiding residual liquid from contaminating subsequent tests or causing misjudgments.

[0087] The introduction of the positive pressure module 3 makes the collection and treatment of leaked liquid more proactive and efficient. The positive pressure module 3 can be configured as an air pump; by adjusting the pressure and duration of the input gas, precise control of the discharge of liquids with different viscosities or flow rates can be achieved, making it particularly suitable for continuous monitoring of minute leaks. For example, in long-term pressure holding tests, even if the liquid seeps out at an extremely slow rate, the positive pressure module 3 can periodically activate to concentrate and discharge the accumulated minute amount of liquid to the detection device, improving detection sensitivity and response speed.

[0088] Meanwhile, a liquid collection tank 4 is provided on one side of the substrate 1, and its position corresponds to the medium liquid outlet 13 of each test area 11. It is used to collect the liquid discharged from the medium liquid outlet 13. The liquid collection tank 4 has a certain volume and a baffle structure, which can collect the discharged liquid from multiple test units in a concentrated manner, prevent liquid splashing or flowing along the surface of the equipment, and keep the tooling and the surrounding environment clean and safe.

[0089] The collection tank 4 facilitates regular inspection and cleaning by operators. Combined with the active drainage function of the positive pressure module 3, the entire system forms a complete closed-loop management process of "leak capture - positive pressure drainage - centralized collection". This process not only improves the adaptability and reliability of the tooling under complex working conditions, but also enhances the ability to monitor the entire process of seal failure behavior. Especially in multi-station, long-term, and high-precision seal testing tasks, this structural combination effectively ensures the continuity and authenticity of test data, avoiding the risk of secondary leakage, cross-contamination, or corrosion caused by the retention of leaked liquid.

[0090] Example 6:

[0091] Reference Figures 1-6 In addition to possessing all the technical solutions of the above embodiments, the embodiments of the present invention further possess the following technical solutions:

[0092] The integrated end-face sealing test device also includes a display plate 5 located in the liquid collection tank 4; when the medium liquid comes into contact with the display plate 5, the display plate 5 is wetted to highlight the medium liquid.

[0093] In this embodiment, a display panel 5 is installed inside the liquid collection tank 4. This display panel 5 is made of a special liquid-sensitive material and possesses excellent wetting response characteristics. When leaked liquid discharged from the medium liquid outlet 13 falls into the liquid collection tank 4 and contacts the display panel 5, the liquid rapidly spreads and is absorbed on the surface of the display panel 5, causing a significant change in its color, gloss, or texture, thus visually forming a clearly identifiable wet mark or color difference mark. This wetting effect makes test liquids that may otherwise be colorless and transparent or have low contrast with the environment significantly more prominent, facilitating operators to identify the presence of leaks remotely or quickly.

[0094] This design significantly enhances the intuitiveness and response speed of leak detection. During multi-station synchronous testing, even when multiple test points share a single collection tank 4, liquid dripping at different times or locations will leave independent wetting marks on the display panel 5. By observing the number, location, and extent of these marks, the leak source and degree can be preliminarily determined, enabling rapid fault location. For minute leaks, the high sensitivity of the display panel 5 can capture the landing point of a single drop of liquid, preventing it from being overlooked due to insufficient liquid volume, thus improving the reliability and fault tolerance of the detection.

[0095] In addition, the display panel 5 can be selected according to the properties of the test medium liquid. For example, oleophilic materials can be used to enhance the response to oily media liquids. Without the need for complex sensors or electronic monitoring systems, this structure achieves visual early warning of leakage status in a low-cost manner, and is particularly suitable for on-site inspections, unattended testing, or as an auxiliary confirmation means for automated monitoring systems.

[0096] Specifically, display sheet 5 can be oil-absorbing paper.

[0097] Combined with the active drainage function of the positive pressure module 3, the role of the display panel 5 is further enhanced: the positive pressure drainage ensures that the liquid is discharged in a timely and directional manner, while the display panel 5 presents the drainage results in real time. The two work together to form a closed-loop testing mechanism of "forced output - visual feedback". Even in low light or complex environmental conditions, the occurrence of a leakage event can be clearly judged by the wetting boundary of the display panel 5, effectively reducing the false judgment rate.

[0098] In summary, the introduction of the display panel 5 within the liquid collection tank 4 transforms the previously concealed presence of liquid into an intuitive visual signal, significantly improving the convenience, sensitivity, and operability of leak identification. This design, without increasing system complexity, enhances the human-machine interface and field adaptability of the tooling, providing a simple and efficient means for rapid assessment of sealing performance and troubleshooting, further improving the functionality and practicality of the entire integrated testing system.

[0099] Example 7:

[0100] Figures 1-6 In addition to providing a testing method for a centralized end-face sealing testing device, the embodiments of the present invention, applied to the centralized end-face sealing testing device in the above embodiments, include the following method:

[0101] S1: The cover plate 22 with sealing ring 21 is detachably and fixedly connected to the test area 11 to establish a seal between the cover plate 22 and the test area 11, thereby sealing the outlet end of the medium liquid channel 100.

[0102] S2: Introduce medium liquid into medium liquid channel 100 and bring it to a predetermined pressure;

[0103] S3: Based on the pressure of the medium liquid channel 100 reaching the predetermined pressure, test the sealing condition between the outlet end of the medium liquid channel 100 and the cover plate 22.

[0104] S2 specifically includes:

[0105] S2.1: Open the corresponding valve, thereby allowing the sealing component 2 corresponding to the valve to enter the test operation;

[0106] S2.2: Introduce medium liquid into medium liquid channel 100 and bring it to a predetermined pressure according to a gradient from small to large.

[0107] S3 specifically includes:

[0108] S3.1: Activate the positive pressure module 3 to input positive pressure gas into the medium liquid receiving tank 12 so that the medium liquid in the medium liquid receiving tank 12 is output from the medium liquid outlet 13;

[0109] S3.2: Observe the actual situation on display 5 using a visual camera;

[0110] When the vision camera observes that the display plate 5 at the corresponding position shows oil, the valve corresponding to the corresponding test area 11 is closed.

[0111] In this embodiment, the testing method of the integrated end-face sealing test device fully combines the structural advantages of the tooling, such as multi-channel parallel testing, active leakage guidance and drainage and visual feedback, to build an efficient, intelligent and automatically responsive sealing performance evaluation process.

[0112] The pressure within the medium liquid channel 100 can be measured by a pressure gauge, and it also includes a controller electrically connected to the pressure gauge, valve, liquid supply device, vision camera, and positive pressure module 3.

[0113] During the test, the first step, S1, is performed: the cover plate 22, which is adapted to the sealing ring 21 to be tested, is installed onto the corresponding test area 11 on the base 1, and a specified preload is applied by bolts or other fastening methods to ensure that the sealing ring 21 is pressed between the cover plate 22 and the test area 11, forming a reliable initial sealing interface. At this time, the sealing ring 21 is embedded in the annular groove 221 on the cover plate 22, with accurate positioning and uniform force, providing a stable assembly foundation for subsequent pressure testing.

[0114] The process then proceeds to stage S2: The test system is connected via the inlet of the medium fluid channel 100, and the test medium fluid is continuously supplied to the main channel 101, gradually increasing the pressure to the set test pressure value and maintaining this pressure for a certain period to simulate static pressure or dynamic load under actual operating conditions. The medium fluid is distributed to each branch channel 102 via the main channel 101 and acts on the sealing interface of each test zone 11. If the seal is intact, the system pressure remains stable; if a minor leak exists, the medium fluid will pass through the failure area and enter the medium fluid collection tank 12 on the surface of the test zone 11, where it will be temporarily captured.

[0115] In the S2 phase of the test method, the specific implementation process is further refined into an orderly pressurization process to ensure the safety, stability, and repeatability of the test data. First, S2.1 is executed: select the branch corresponding to the sealing component 2 that needs to participate in this test and open its valve to allow the test medium liquid to enter the designated branch channel 102 and act on the sealing interface of the corresponding test area 11.

[0116] After the valve is opened, the process enters stage S2.2, where test medium is continuously introduced into the inlet of medium channel 100, and the system pressure is gradually increased using a gradient pressurization method. Specifically, the pressure is not applied to the final predetermined pressure all at once, but rather in stages according to multiple pressure levels, such as 30%, 60%, 80%, 100%, and 120% of the rated pressure. Each pressure level is maintained for a certain period of time, such as 5 to 10 minutes, to observe the performance of the sealing interface under different loads. This gradient pressurization process simulates dynamic scenarios such as equipment start-up and shutdown, and load changes in actual working conditions, which helps to expose potential defects in the seals under conditions such as thermal expansion and contraction, material creep, or stress relaxation.

[0117] Gradient pressurization not only improves the safety margin of the test, preventing abnormal failures such as extrusion or overturning of the sealing ring 21 or deformation of the substrate 1 due to sudden pressure increases, but also provides rich data for the quantitative evaluation of sealing performance by recording the pressure decay curves or leakage development trends at each stage through step-by-step pressure holding. For example, if an abnormal pressure drop rate is found at a certain pressure level, or if the visual monitoring system detects a wetting signal on the display panel 5, the pressurization can be immediately paused to locate the problem and decide whether to continue the test, thus avoiding irreversible damage.

[0118] When entering stage S3, the sealing performance assessment stage, the system comprehensively judges the sealing status based on whether the medium liquid channel 100 can stably maintain a predetermined pressure. Building upon this, an active detection mechanism is further introduced. First, S3.1 is executed: the positive pressure module 3, located on the other side of the medium liquid collection tank 12 in each test area 11, is activated, introducing gas into the collection tank. Without damaging the main seal, the gas pressure forces the accumulated leaking liquid in the tank to be directionally discharged along the medium liquid outlet 13. This process achieves forced removal and centralized release of potential leaking liquid, avoiding misjudgments or impacts on subsequent tests due to liquid retention.

[0119] Then, step S3.2 is executed: A vision camera positioned above or to the side of the collection tank 4 monitors the state changes of the display panel 5 in real time. Because the display panel 5 has excellent wetting and developing characteristics, once media liquid exits from the outlet and contacts its surface, obvious wetting marks are immediately produced, such as color deepening, changes in reflection, or outline diffusion. This change is quickly captured by the vision camera and transmitted to the control system. The system analyzes the wetting area and its location on the display panel 5 using an image recognition algorithm to accurately determine which test area 11 has leaked.

[0120] When the vision camera detects an oil wetting signal on the display panel 5 at a specific location, the control system immediately responds and automatically closes the valve on the branch channel 102 corresponding to that leak test area 11, blocking the supply of medium fluid to that branch and preventing the leak from expanding or affecting the pressure stability of other normal test units. This closed-loop control mechanism not only achieves rapid isolation of the fault point and ensures the continuous operation of other test channels, but also avoids delays and errors caused by human intervention, significantly improving the safety, continuity, and intelligence level of the overall testing process.

[0121] This testing method achieves a fully coordinated process of "pressurization—leak detection—drainage—development—identification—valve closure." Especially in batch testing scenarios involving multiple specifications and batches of seals, this method can automatically screen, trigger anomaly alarms, and partially halt testing in an unattended manner, significantly improving testing efficiency and data reliability. Simultaneously, the recorded leakage time, location, and wetting images can serve as crucial evidence for seal life assessment, process improvement, and quality traceability, comprehensively supporting product design optimization and manufacturing process control, embodying an advanced testing concept of integration, standardization, and intelligence.

[0122] It can be understood that, except for conflicting parts, the above embodiments 1-7 can be freely combined to form other embodiments of the present invention.

[0123] In the description of this invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0124] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0125] In this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that they are in indirect contact through an intermediate medium. Furthermore, "above," "over," and "on top" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature. The term "comprising" or any other similar term is intended to cover a non-exclusive inclusion, such that a process, article, or apparatus / device that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such processes, articles, or apparatus / devices.

[0126] The technical solution of the present invention has been described above with reference to the preferred embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the scope of protection of the present invention is obviously not limited to these specific embodiments. Without departing from the principles of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after such changes or substitutions will all fall within the scope of protection of the present invention.

Claims

1. A compact end-face sealing test device for testing the sealing performance of a sealing assembly (2), the sealing assembly (2) comprising a sealing ring (21) and a cover plate (22); characterized in that, The integrated end-face sealing test device includes a substrate (1); The substrate (1) has a medium liquid channel (100), the outlet end of the medium liquid channel (100) extends to the surface of the substrate (1), and a test area (11) is formed at the surface position of the substrate (1) corresponding to the outlet end of the medium liquid channel (100). The cover plate (22) can be detachably connected to the test area (11); when the cover plate (22) is detachably connected to the test area, the sealing ring (21) is located between the cover plate (22) and the test area (11) to establish a seal between the cover plate (22) and the test area (11), thereby closing the outlet end of the medium liquid channel (100); The medium liquid channel (100) can be connected to a liquid supply device to input medium liquid into the medium liquid channel (100) and achieve a predetermined pressure; The medium liquid channel (100) includes a main channel (101) and multiple branch channels (102), one end of each branch channel (102) is connected to the main channel (101); One end of the main channel (101) is the inlet end of the medium liquid channel (100), and the other end of the multiple branch channels (102) forms the outlet end of the corresponding medium liquid channel (100), so as to form multiple independent test areas (11) on the surface of the substrate (1) and then perform simultaneous or independent sealing performance tests on multiple sealing components (2). The cover plate (22) has an annular groove (221) for installing the sealing ring (21); the test area (11) has a medium liquid collection tank (12), which corresponds to the outer periphery of the annular groove (221) to collect the medium liquid leaked by the sealing ring (21) due to sealing failure; A medium liquid outlet (13) is provided on one side of the medium liquid receiving tank (12), and the medium liquid outlet (13) can discharge the medium liquid in the medium liquid receiving tank (12). It also includes a positive pressure module (3) fixedly connected to the substrate (1), the positive pressure module (3) being located on the other side of the medium liquid receiving tank (12); When the positive pressure module (3) is working, positive pressure gas is input into the medium liquid receiving tank (12) so that the medium liquid in the medium liquid receiving tank (12) is output from the medium liquid outlet (13).

2. The integrated end-face sealing test device as described in claim 1, characterized in that: It also includes a valve located on the branch passage (102) and used to independently open and close the branch passage (102).

3. The integrated end-face sealing test device as described in claim 2, characterized in that: It also includes a liquid collection tank (4) disposed on one side of the substrate (1), which can fall into the liquid collection tank (4) after the medium liquid in the liquid collection tank (4) is output from the medium liquid outlet (13); it also includes a display panel (5) disposed in the liquid collection tank (4). When the medium liquid comes into contact with the display panel (5), the display panel (5) is wetted to highlight the medium liquid.

4. The integrated end-face sealing test device as described in claim 2, characterized in that: The sealing component (2) is an aviation end face sealing component (2).

5. A test method for an integrated end-face sealing test device, characterized in that: The method, applied to the integrated end-face seal testing device as described in any one of claims 1-4, comprises: S1: The cover plate (22) with the sealing ring (21) is detachably and fixedly connected to the test area (11) to establish a seal between the cover plate (22) and the test area (11), thereby closing the outlet end of the medium liquid channel (100); S2: Introduce medium liquid into the medium liquid channel (100) and bring it to a predetermined pressure; S3: Based on the pressure of the medium liquid channel (100) reaching the predetermined pressure, test the sealing condition between the outlet end of the medium liquid channel (100) and the cover plate (22).

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