A high-pressure dynamic seal testing device and a testing method thereof

Abstract

The application discloses a high-pressure dynamic seal testing device and a testing method thereof, and belongs to the technical field of dynamic seal testing. The device comprises a testing box, a high-pressure inflation device and a moving device which are respectively arranged in communication with the testing box, and a fastener is used to fix the high-pressure dynamic seal in the testing box. Meanwhile, the air leakage testing device is used to detect the sealing performance of the high-pressure dynamic seal under different air pressures and different moving speeds. The high-pressure dynamic seal testing device and the testing method thereof have the advantages of simple structure, convenient assembly, effective testing of the sealing performance of the seal under high pressure and moving conditions, simple, convenient, effective, fast and high-reliability testing process, and can be widely applied to the sealing performance testing and service life testing of the seal under different pressures and different linear moving conditions, and has a good application prospect.

Description

Technical Field

[0001] This invention belongs to the field of dynamic seal testing technology, specifically relating to a high-pressure dynamic seal testing device and its testing method. Background Technology

[0002] Seals are used to prevent gases, liquids, or fluids from entering or leaving enclosed spaces, serving a sealing function. They are widely used in industry, agriculture, national defense, and daily life. With the rapid development of various technologies, the requirements for the sealing performance of equipment are becoming increasingly stringent, and the requirements for sealing components are also becoming more demanding.

[0003] Depending on the operating environment, the form and type of seals vary, and the required performance also differs. In certain high-pressure, reciprocating motion environments, the sealing performance of seals, especially under dynamic conditions, is subject to extremely high requirements. Therefore, in practical applications, it is necessary to test the sealing performance of seals under high-pressure dynamic sealing conditions.

[0004] However, in the existing field of seal testing, static atmospheric pressure or static low pressure conditions are usually used to test the seals. Although this can meet the performance testing requirements of conventional seals, it cannot accurately evaluate the sealing performance of seals under high pressure and dynamic conditions. As a result, the sealing performance of seals cannot be accurately judged, which affects the normal use and life determination of seals and has certain application limitations. Summary of the Invention

[0005] In response to one or more of the above-mentioned defects or improvement needs of the prior art, the present invention provides a high-pressure dynamic seal testing device and its testing method, which can perform sealing tests on seals under static and dynamic high pressure, respectively, and meet the needs of high-pressure dynamic seal performance testing and life testing.

[0006] To achieve the above objectives, the present invention provides a high-pressure dynamic seal testing device, comprising a test chamber, a high-pressure inflation device, a motion device, and a leakage testing component;

[0007] The test chamber is a box structure with an opening on one side, and an internal receiving groove for placing high-pressure dynamic sealing components is formed therein. A cover plate is provided on the opening side to close the opening. Fasteners are detachably installed in the box to press the high-pressure dynamic sealing components into the receiving groove.

[0008] The high-pressure gas filling device is sealed and connected to the test chamber, and is used to fill the test chamber with high-pressure gas;

[0009] The motion device includes a connecting rod and a driving component. A motion hole is provided on the test box corresponding to the connecting rod, which communicates with the receiving groove. One end of the connecting rod passes through the motion hole and each high-pressure dynamic sealing component embedded in the receiving groove in sequence and then extends into the test box. The driving component is connected to the other end of the connecting rod and is used to drive the connecting rod to perform linear reciprocating motion.

[0010] The leakage test component is fixedly installed at the position where the test box has a movement hole, and is used to detect high-pressure gas leaking through the movement hole, thereby determining the sealing capability of the high-pressure dynamic seal.

[0011] As a further improvement of the present invention, the inner diameter of the receiving groove is smaller than the inner diameter of the cavity, so that the cavity and the receiving groove form a T-shaped cavity structure in the test chamber.

[0012] As a further improvement of the present invention, a force transmission element is also provided between the fastener and the high-pressure dynamic seal.

[0013] As a further improvement of the present invention, an elastic element is also provided between the force transmission element and the fastener;

[0014] A groove is provided at one end of the force transmission member relative to the fastener, and one end of the elastic member is embedded in the groove.

[0015] As a further improvement of the present invention, a plurality of high-pressure dynamic seals are provided in the receiving groove, and a force transmission element is also provided between the plurality of high-pressure dynamic seals.

[0016] As a further improvement of the present invention, it also includes a pipe fitting, wherein the pipe fitting is a sleeve structure with openings at both ends;

[0017] The high-pressure inflation device and the test box are connected and installed through the pipe joint.

[0018] As a further improvement of the present invention, a sealing element is provided between the pipe joint and the test box for sealing after the two are connected.

[0019] As a further improvement of the present invention, the test box and the driving component are fixedly mounted on the same mounting component to prevent relative movement between the test box and the driving component when the connecting rod moves.

[0020] As another aspect of the present invention, a high-pressure dynamic seal testing method is provided, which utilizes the aforementioned high-pressure dynamic seal testing device and includes the following steps:

[0021] (1) Assemble the high-pressure inflation device, motion device, high-pressure dynamic seal, fasteners and leakage test components in the corresponding positions on the test box;

[0022] (2) Open the gas outlet switch of the high-pressure charging device and charge the test chamber with high-pressure gas;

[0023] (3) The sealing performance of the high-pressure dynamic seal under static high pressure is tested by the leakage test assembly;

[0024] (4) Turn on the motion device so that the connecting rod can continuously reciprocate in a straight line along the test box;

[0025] (5) The sealing performance of the high-pressure dynamic seal under dynamic high pressure is tested by the leakage test assembly.

[0026] As a further improvement of the present invention, the specific installation process of each device in step (1) includes the following parts:

[0027] (1.1) Place the high-pressure dynamic seal in the receiving groove;

[0028] (1.2) Pass one end of the connecting rod through the motion hole and the high-pressure dynamic seal in sequence, and enter the cavity of the test chamber. Connect the other end of the connecting rod to the drive component.

[0029] (1.3) Install the fasteners inside the test chamber and tighten them, and install the cover plate at the opening of the test chamber to seal the opening;

[0030] (1.4) Seal and connect the pipe joint to the test chamber, and connect the high-pressure air charging device to the pipe joint.

[0031] The aforementioned improved technical features can be combined with each other as long as they do not conflict with each other.

[0032] In summary, the beneficial effects of the above-described technical solutions conceived by this invention compared with the prior art include:

[0033] (1) The high-pressure dynamic seal testing device and its testing method of the present invention provide the required testing environment for the testing of high-pressure dynamic seals by connecting the test chamber to the high-pressure inflation device and the motion device respectively; the high-pressure dynamic seal is tightly abutted against the inner wall of the test chamber by the fastening action of the fasteners to prevent the high-pressure dynamic seal from moving with the connecting rod during the test; the sealing performance of the high-pressure dynamic seal is detected by the leakage testing component set at the corresponding sealing point of the high-pressure dynamic seal.

[0034] (2) The high-pressure dynamic seal test device and test method of the present invention continuously reciprocate linearly relative to the test box by driving the connecting rod under the drive of the driving component, and the motion frequency of the connecting rod can be adjusted by setting the frequency of the driving component to meet the test of the sealing performance of the high-pressure dynamic seal under different test environments.

[0035] (3) The high-pressure dynamic seal test device and test method of the present invention, by setting an elastic element between the two, uses the rebound effect of the elastic element to maintain the pressure given by the fastener and maintain the force between the fastener and the high-pressure dynamic seal; at the same time, by setting a force transmission element between the elastic element and the high-pressure dynamic seal and between the seals, the force of the fastener can be better transmitted to each seal, so as to ensure that the force of each seal is relatively balanced.

[0036] (4) The high-pressure dynamic seal test device and its test method of the present invention have a simple structure and are easy to assemble. They can effectively test the sealing performance of the seal under high pressure and motion conditions. The test process is simple, convenient and effective, fast and reliable. It can be widely used for sealing performance testing and life testing of seals under different pressure and linear motion conditions, and has good application prospects. Attached Figure Description

[0037] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0038] Figure 1 This is a schematic diagram of the high-pressure dynamic seal testing device in an embodiment of the present invention;

[0039] In all the accompanying drawings, the same reference numerals denote the same technical features, specifically: 1, first seal; 2, cover plate; 3, connecting rod; 4, fastener; 5, second seal; 6, test chamber; 7, pipe joint; 8, elastic element; 9, first force transmission element; 10, second force transmission element; 11, high-pressure dynamic seal; 12, leakage test assembly; 13, high-pressure inflation device; 14, drive element; 15, mounting plate. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0041] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0042] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0043] 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, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0044] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply 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 that the first feature is at a lower horizontal level than the second feature.

[0045] Example:

[0046] Please see Figure 1The high-pressure dynamic seal testing device and its testing method in a preferred embodiment of the present invention include a test chamber 6, a high-pressure inflation device 13, a moving device, and a leakage testing component 12. The high-pressure inflation device 13 and the moving device are respectively connected to the test chamber 6, and a high-pressure dynamic seal 11 is placed inside the test chamber 6. Simultaneously, the leakage testing component 12 measures the sealing effect of the high-pressure dynamic seal 11 in both static and dynamic states.

[0047] Specifically, in the preferred embodiment, the test chamber 6 is a box structure with an opening on one side, providing installation and testing space for the high-pressure dynamic seal 11. Accordingly, a receiving groove for placing the high-pressure dynamic seal 11 is formed inside the test chamber 6, and a cover plate 2 for closing the opening is provided on the opening side of the test chamber 6. In actual operation, after the high-pressure dynamic seal 11 is embedded in the receiving groove and installed, the cover plate 2 is connected and sealed to the opening of the test chamber 6.

[0048] like Figure 1 As shown, in the preferred embodiment, the inner diameter of the receiving groove is smaller than the inner diameter of the test chamber 6, so that a T-shaped cavity is formed inside the test chamber 6 to facilitate the installation of the high-pressure dynamic seal 11.

[0049] Preferably, a first sealing element 1 is further provided between the cover plate 2 and the test chamber 6 to further seal the opening and prevent high-pressure gas in the test chamber 6 from leaking from the opening, thereby affecting the test results of the high-pressure dynamic sealing element 11. More preferably, corresponding to the installation of the first sealing element 1, a groove is provided on one side of the cover plate 2, and preferably the depth of the groove is not greater than the thickness of the first sealing element 1, so that the first sealing element 1 protrudes from the surface of the cover plate 2 after being placed in the groove, and the first opening is further squeezed and sealed by the connecting element.

[0050] Furthermore, in the preferred embodiment, the fastener 4 is detachably connected and installed inside the test chamber 6, used to press and fix the high-pressure dynamic seal 11 in the receiving groove, and to disassemble it after the test, so that the high-pressure dynamic seal 11 can be removed from the test chamber 6. Figure 1 As shown, in the preferred embodiment, the fastener 4 is a nut with a through hole in the middle, with threads on its outer side wall and threads on the inner wall at the corresponding position of the test box 6. The nut is fixedly connected to the test box 6 by the threads, and the high-pressure dynamic seal 11 is pressed and fixed in the receiving groove by tightening the nut.

[0051] like Figure 1 In the preferred embodiment shown, the high-pressure dynamic seal 11 is a flexible graphite ring, and a first force transmission element 9 is provided between the fastener 4 and the flexible graphite ring to improve the force transmission efficiency between them. In the preferred embodiment, the first force transmission element 9 is a T-shaped metal ring to facilitate installation in the T-shaped cavity.

[0052] Preferably, an elastic element 8 is further provided between the fastener 4 and the first force transmission element 9, and the pressure of the fastener 4 on the flexible graphite ring is maintained by the compression and rebound of the elastic element 8. Figure 1 In the preferred embodiment shown, the elastic element 8 is a disc spring. The disc spring maintains the force between the fastener 4 and the flexible graphite ring, preventing the flexible graphite ring from loosening in the receiving groove due to insufficient force, thereby affecting its sealing effect.

[0053] Meanwhile, in relation to the installation of the elastic element 8, a groove is provided at the end of the first force transmission element 9 away from the flexible graphite ring, and one end of the elastic element 8 is embedded in the groove to reduce the installation space. Preferably, the depth of the groove is set to be less than the thickness of the elastic element 8 after compression deformation to ensure that the compression deformation of the elastic element 8 is not affected.

[0054] like Figure 1 In the preferred embodiment shown, a plurality of high-pressure dynamic seals 11 are provided in the receiving groove to seal it, and a second force transmission member 10 is provided between the plurality of high-pressure dynamic seals 11 to improve the force transmission efficiency of the high-pressure dynamic seals 11, so that the force between each layer of high-pressure dynamic seals 11 is relatively balanced, and to prevent some high-pressure dynamic seals 11 from loosening or breaking due to uneven force, thus affecting their sealing effect.

[0055] In actual setup, in order to reduce the impact of the fastener 4, elastic element 8 and first force transmission element 9 on the sealing performance test results of the high-pressure dynamic seal 11, through holes can be provided axially on the fastener 4, elastic element 8 and first force transmission element 9 respectively, so as to ensure that high-pressure gas can reach the location of the high-pressure dynamic seal 11.

[0056] Furthermore, in the preferred embodiment, the high-pressure inflation device 13 is in sealed communication with the interior of the test chamber 6, and the high-pressure inflation device 13 is provided with an air outlet unit and an air release unit, and is provided with a corresponding "air outlet" switch and "air release" switch, for filling the cavity of the test chamber 6 with high-pressure gas, and for releasing the high-pressure gas in the test chamber 6 after the test is completed.

[0057] Preferably, in order to better deliver the high-pressure gas in the high-pressure inflation device 13 into the test chamber 6, a pipe connector 7 is also provided, such as... Figure 1 As shown, it is a sleeve structure with openings at both ends, with one end connected to the inner cavity of the test chamber 6 and the other end connected to the high-pressure inflation device 13, thereby realizing the connection between the high-pressure inflation device 13 and the test chamber 6.

[0058] Preferably, for the matching installation of the pipe connector 7, a through hole communicating with the inner cavity is provided on the side wall of the test chamber 6, and preferably the through hole is a stepped hole, and the inner diameter of the hole on the side of the outer wall of the test chamber 6 matches the outer diameter of one end of the pipe connector 7. Preferably, a thread is provided on the inner wall of the side hole, and a matching thread is provided on the outer wall of the corresponding end of the pipe connector 7, so that the test chamber 6 and the pipe connector 7 are connected by thread matching.

[0059] Preferably, to ensure the sealing of the connection between the pipe joint 7 and the stepped hole, a second sealing element 5 is provided between the pipe joint 7 and the test chamber 6. For example... Figure 1 In the preferred embodiment shown, the inner diameter of the hole on one side of the outer wall of the test chamber 6 is larger than the inner diameter of the hole on the other side, and an annular step is formed on the side away from the outer wall. The second sealing element 5 is abutted against the annular step to achieve a seal between the pipe joint 7 and the test chamber 6.

[0060] Correspondingly, the other end of the pipe connector 7 is connected to the high-pressure inflation device 13, allowing high-pressure gas to enter the test chamber 6 through the through hole in the pipe connector 7. During actual testing, the pressure value of the gas output by the high-pressure inflation device 13 can be adjusted according to actual needs to achieve the required high-pressure environment inside the test chamber 6.

[0061] Furthermore, in the preferred embodiment, the motion device includes a connecting rod 3 and a driving member 14. Corresponding to the installation of the connecting rod 3, a motion hole communicating with the receiving groove is provided on the side wall of the test chamber 6, so that one end of the connecting rod 3 can pass through the motion hole and each high-pressure dynamic seal 11 embedded in the receiving groove in sequence, and then extend into the test chamber 6. More preferably, the motion hole and the receiving groove are coaxially arranged. At the same time, the other end of the connecting rod 3 is connected to the driving member 14, so that the connecting rod 3 can perform linear reciprocating motion along the motion hole under the drive of the driving member 14, so as to test the sealing effect of the high-pressure dynamic seal 11 when the connecting rod 3 reciprocates.

[0062] like Figure 1 In the preferred embodiment shown, the connecting rod 3 and the driving component 14 are connected by a pin. Of course, the two can also be connected by other connection methods such as threaded connection, riveting, welding, etc.

[0063] Preferably, one end of the connecting rod 3 passes through the motion hole, the high-pressure dynamic seal 11, the force transmission element, the elastic element 8, and the fastener 4 in sequence. Preferably, the inner diameter of the force transmission element, the elastic element 8, and the fastener 4 is larger than the inner diameter of the connecting rod 3, so as to ensure that there is no seal between them and the connecting rod 3, thereby reducing the impact on the test results.

[0064] In actual setup, the inner diameter of the moving hole is preferably larger than the diameter of the connecting rod 3, so that if there is high-pressure gas leakage in the receiving tank during the test, the high-pressure gas can be smoothly discharged from the moving hole.

[0065] Furthermore, to ensure the reliability of the relative movement between the connecting rod 3 and the test box 6 under the drive of the drive component 14, the test box 6 and the drive component 14 are mounted on the same mounting component. For example... Figure 1 In the preferred embodiment shown, the test box and the drive component 14 are connected by a mounting plate 15. The test box 6 and the drive component 14 are fixedly installed at both ends of the mounting plate 15 to prevent relative movement between the test box 6 and the drive component 14 due to friction between the connecting rod 3 and the high-pressure dynamic seal 11 when the connecting rod 3 reciprocates, thereby causing a change in the movement position of one end of the connecting rod 3 within the test box 6.

[0066] Furthermore, to measure the sealing effect of the high-pressure dynamic seal 11, a leakage test component 12 is installed at the location of the moving hole in the test chamber 6. This component can detect the pressure value of the gas inside the moving hole to determine whether there is high-pressure gas leakage and thus the sealing capability of the high-pressure dynamic seal 11. Figure 1 In the preferred embodiment shown, the air leakage test assembly 12 is disposed on the side wall of the test chamber 6 at the location of the motion hole, and a channel is provided in the middle therein, so that when the connecting rod 3 is installed, the connecting rod 3 can pass through the air leakage test assembly 12 and be installed accordingly.

[0067] Furthermore, for the high-pressure dynamic seal testing device in the preferred embodiment, the testing method preferably includes the following steps:

[0068] (1) Assemble the high-pressure inflation device 13, motion device, high-pressure dynamic seal 11 and leakage test assembly 12 in the corresponding positions on the test chamber 6.

[0069] The specific installation process of each device in the preferred embodiment includes the following parts:

[0070] (1.1) Place the high-pressure dynamic seal 11 in the receiving groove;

[0071] In a preferred embodiment, the second force transmission element 10 is placed in the receiving groove first, and then the high-pressure dynamic seal element 11 is placed. When multiple high-pressure dynamic seal elements 11 are provided, a second force transmission element 10 is also provided between the multiple high-pressure dynamic seal elements 11. In a preferred embodiment, a second force transmission element 10 is placed between every two high-pressure dynamic seal elements 11.

[0072] (1.2) Pass one end of the connecting rod 3 through the motion hole and the high-pressure dynamic seal 11 in sequence, and enter the test chamber 6. Connect the other end of the connecting rod 3 to the drive component 14.

[0073] (1.3) Install the fastener 4 inside the test chamber 6 and tighten it, and install the cover plate 2 at the opening of the test chamber 6 to seal the opening;

[0074] In a preferred embodiment, a first force transmission component 9 and an elastic component 8 are also provided. The first force transmission component 9 and the elastic component 8 are sleeved on one end of the connecting rod 3, and then the fastener 4 is installed and tightened.

[0075] (1.4) Seal and connect the pipe joint 7 to the test box 6, and connect the high-pressure air charging device 13 to the pipe joint 7.

[0076] (2) Open the gas outlet switch of the high-pressure gas charging device 13 and charge the required high-pressure gas into the test chamber 6;

[0077] During actual testing, the output gas of the high-pressure inflation device 13 can be adjusted to the required pressure value according to the required testing environment requirements, and the high-pressure gas can be continuously and stably output during testing. Alternatively, the test chamber 6 can be filled with high-pressure gas at a certain pressure value, and then the gas outlet switch of the high-pressure inflation device 13 can be turned off.

[0078] (3) The sealing performance of the high-pressure dynamic seal 11 under static high pressure is tested by the leakage test assembly 12 to ensure that the static sealing performance of the high-pressure dynamic seal 11 is good.

[0079] (4) Turn on the motion device so that the connecting rod 3 can continuously reciprocate in a straight line along the test box 6.

[0080] In actual measurement, the driving component 14 can be used to drive the connecting rod 3 to perform linear reciprocating motion. At the same time, the reciprocating motion frequency of the connecting rod 3 can be adjusted by setting the driving frequency of the driving component 14 according to the detection requirements.

[0081] (5) The sealing performance of the high-pressure dynamic seal 11 under dynamic high pressure is tested by the leakage test assembly 12.

[0082] The gas leakage test assembly 12 is used to detect gas leakage at the corresponding sealing point of the high-pressure dynamic seal 11, and to determine the sealing performance of the high-pressure dynamic seal 11 under different gas pressures and different linear motion frequencies. Furthermore, during actual testing, the sealing life and other indicators of the high-pressure dynamic seal 11 can be determined based on the changes in its sealing effect over different test times.

[0083] In a preferred embodiment, the high-pressure inflation device 13 continuously and stably outputs high-pressure gas. After the test is completed, the outlet switch of the high-pressure inflation device 13 is first turned off, and then the venting switch of the high-pressure inflation device 13 is turned on; the drive component 14 switch is turned off.

[0084] The high-pressure dynamic seal testing device and its testing method of this invention have a simple structure and are easy to assemble. They can effectively test the sealing performance of seals under high pressure and motion conditions. The testing process is simple, convenient, effective, fast, and reliable. It can be widely used for sealing performance testing and life testing of seals under different pressure and linear motion conditions, and has good application prospects.

[0085] Those skilled in the art will readily understand that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A high-pressure dynamic seal testing device, characterized in that, Includes a test chamber, a high-pressure inflation device, a motion device, and a leak test assembly; The test chamber is a box structure with an opening on one side. An internal receiving groove is formed for placing a high-pressure dynamic sealing component, and a cover plate is provided on the opening side to close the opening. Fasteners are detachably installed in the box to press the high-pressure dynamic sealing component into the receiving groove. A force transmission element is also provided between the fastener and the high-pressure dynamic seal; an elastic element is also provided between the force transmission element and the fastener; a groove is provided at one end of the force transmission element opposite to the fastener, and one end of the elastic element is embedded in the groove; and multiple high-pressure dynamic seals are provided in the receiving groove, and a force transmission element is also provided between the multiple high-pressure dynamic seals. The high-pressure gas filling device is sealed and connected to the test chamber, and is used to fill the test chamber with high-pressure gas; The motion device includes a connecting rod and a driving component. A motion hole is provided on the test box corresponding to the connecting rod, which communicates with the receiving groove. One end of the connecting rod passes through the motion hole and each high-pressure dynamic sealing component embedded in the receiving groove in sequence and then extends into the test box. The driving component is connected to the other end of the connecting rod and is used to drive the connecting rod to perform linear reciprocating motion. The leakage test component is fixedly installed at the position where the test box has a movement hole, and is used to detect high-pressure gas leaking through the movement hole, thereby determining the sealing capability of the high-pressure dynamic seal.

2. The high-pressure dynamic seal testing device according to claim 1, characterized in that, The inner diameter of the receiving groove is smaller than the inner diameter of the box, so that a T-shaped cavity is formed inside the box.

3. The high-pressure dynamic seal testing device according to claim 1 or 2, characterized in that, It also includes a pipe fitting, which is a sleeve structure with openings at both ends; The high-pressure inflation device and the test box are connected and installed through the pipe joint.

4. The high-pressure dynamic seal testing device according to claim 3, characterized in that, A sealing element is provided between the pipe joint and the test chamber for sealing after the two are connected.

5. The high-pressure dynamic seal testing device according to claim 1, 2, or 4, characterized in that, The test box and the drive component are fixedly mounted on the same mounting component to prevent relative movement between the test box and the drive component when the connecting rod moves.

6. A high-pressure dynamic seal testing method, which utilizes the high-pressure dynamic seal testing device according to any one of claims 1 to 5, characterized in that, Includes the following steps: (1) Assemble the high-pressure inflation device, motion device, high-pressure dynamic seal, fasteners and leakage test components in the corresponding positions on the test box; (2) Open the gas outlet switch of the high-pressure gas charging device and charge the test chamber with high-pressure gas; (3) The sealing performance of the high-pressure dynamic seal under static high pressure is tested by the leakage test assembly; (4) Turn on the motion device to make the connecting rod continuously reciprocate in a straight line along the test box; (5) The sealing performance of the high-pressure dynamic seal under dynamic high pressure is tested by the leakage test assembly.

7. The high-pressure dynamic seal test method according to claim 6, characterized in that, The specific installation process of each device in step (1) includes the following parts: (1.1) Place the high-pressure dynamic seal in the receiving groove; (1.2) Pass one end of the connecting rod through the motion hole and the high-pressure dynamic seal in sequence, and enter the cavity of the test chamber. Connect the other end of the connecting rod to the drive component. (1.3) Install the fasteners inside the test chamber and tighten them, and install the cover plate at the opening of the test chamber to seal the opening; (1.4) Seal and connect the pipe joint to the test chamber, and connect the high-pressure gas charging device to the pipe joint.

Images