Spring energy storage seal ring leakage test tooling

Abstract

This utility model discloses a spring energy storage sealing ring leakage testing fixture. An upper disc is fixed to the upper end of a middle cylinder, and a lower plug is installed inside the middle cylinder, forming a sealing cavity between the upper disc and the lower plug. The spring energy storage sealing ring under test is compressed within this cavity by the lower plug, sealing the end of the cavity near the vent. This fixture meets the leakage testing requirements for spring energy storage sealing rings of different specifications and under different compression conditions. It enables airtightness testing of spring energy storage sealing rings of different specifications under various compression conditions, improves the fixture's versatility and adaptability, expands the testing coverage, and allows for rapid assembly and disassembly of the tested component. This makes the testing process more efficient, stable, and standardized, providing reliable test data for a comprehensive study and evaluation of the sealing behavior of spring energy storage sealing rings under different specifications and compression ratios.

Description

Technical Field

[0001] This utility model relates to a spring energy storage sealing ring leakage test fixture, used to test the sealing performance of the spring energy storage sealing ring. Background Technology

[0002] Spring-storage seals are industrial sealing components consisting of a high-performance polymer shell and a stainless steel energy-storage spring. Their sealing force derives from the combined effect of spring preload and system pressure, making them suitable for airtight applications such as rotary, reciprocating, and static sealing. Before leaving the factory, spring-storage seals undergo airtightness testing to ensure their performance meets the requirements of specific applications.

[0003] The airtightness of spring energy storage seals is generally tested using testing fixtures. However, existing testing fixtures for spring energy storage seals only verify leakage performance under single-size and fixed compression ratio conditions. The sealing cavity size, clamping adjustment, and loading method in these fixtures are all fixed parameters, resulting in a narrow range of applicability. Testing other specifications requires redesigning the sealing installation cavity or replacing it with a dedicated fixture, which not only increases the test preparation cycle and cost but also hinders the formation of systematic performance comparison data. Single-specification fixtures cannot meet the testing requirements of multiple categories and operating conditions. The lack of versatility and scalability of these fixtures limits the comprehensive research and evaluation of the sealing behavior of spring energy storage seals under different structural dimensions and compression ratios. Utility Model Content

[0004] The spring energy storage sealing ring leakage test fixture provided by this utility model enables the airtightness testing of spring energy storage sealing rings of different specifications under different compression conditions, improves the versatility and adaptability of the fixture, expands the range of test conditions, and makes the test process more efficient, stable and standardized. It provides reliable test data for the comprehensive study and evaluation of the sealing behavior of spring energy storage sealing rings under different specifications and compression ratios.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A spring energy storage sealing ring leakage test fixture is characterized by comprising an intermediate cylinder, an upper disc fixedly sealed at the upper end of the intermediate cylinder, and a lower plug installed in the intermediate cylinder. A sealing cavity is formed between the upper disc and the lower plug. An air inlet and an air outlet are respectively opened on the upper disc and communicate with the sealing cavity. The spring energy storage sealing ring under test is compressed in the sealing cavity by the lower plug, sealing the end of the sealing cavity near the air outlet. The axial position of the lower plug in the intermediate cylinder is adjustable.

[0006] Preferably, the lower plug is threadedly fitted into the middle cylinder, and the bottom of the middle cylinder is fitted with a radially arranged fastening screw. The inner end of the fastening screw is pressed against the lower plug, and an internal hexagon blind hole is opened at the center of the bottom surface of the lower plug.

[0007] Preferably, the outer wall of the lower end of the middle layer cylinder has two radial planes arranged in a radial direction and arranged symmetrically. A threaded through hole for cooperating with a fastening screw is opened from the radial plane inward.

[0008] Preferably, the lower plunger has an upwardly protruding ring on its top surface, and an annular groove corresponding to the protruding ring is formed on the bottom surface of the upper disc. There are multiple protruding rings arranged concentrically, and the protruding rings are fitted into the corresponding annular grooves with a gap fit. The energy storage sealing ring of the spring under test is placed on the upper plunger and is located on the outer periphery of the outermost protruding ring or between adjacent protruding rings. The air inlet coincides with the center of the annular groove, and the air outlet is opened on the outside of the annular groove and is located on the outside of the energy storage sealing ring of the spring under test.

[0009] Preferably, the air inlet and air outlet are radially aligned along the upper disk.

[0010] Preferably, the upper disc and the middle cylinder are connected by bolts, and a sealing ring pressed by the upper disc is embedded on the top surface of the middle cylinder, and a sealing ring pressed by the lower plug is embedded on the inner wall.

[0011] The beneficial effects of this utility model are: This utility model discloses a spring energy storage sealing ring leakage test fixture. An upper disc is fixed to the upper end of a middle layer cylinder, and a lower plug is installed inside the middle layer cylinder, forming a sealed cavity between the upper disc and the lower plug. The spring energy storage sealing ring under test is compressed within the sealed cavity by the lower plug, sealing the end of the cavity near the air outlet. During testing, the air inlet is connected to an air pump, and a pressure tester is inserted into the air outlet. The air pump is started to pump air into the sealed cavity, causing the air pressure in the sealed cavity to rise. The change in the pressure tester reading is observed, thus forming a leakage test for the spring energy storage sealing ring. Spring energy storage sealing rings with different cross-sectional dimensions and diameters can be installed in the sealed cavity to meet the leakage testing needs of spring energy storage sealing rings of different specifications. The invention aims to adjust the compression of the tested spring energy storage seal by regulating the axial position of the lower plunger in the middle cylinder. This satisfies the leakage testing requirements of the spring energy storage seal under different compression conditions, enabling the airtightness testing of spring energy storage seals of different specifications under various compression conditions. It improves the versatility and adaptability of the tooling, expands the testing condition coverage, allows for rapid assembly and disassembly of the tested parts, and avoids repetitive positioning errors and potential clamping inconsistencies caused by frequent tooling changes. This makes the testing process more efficient, stable, and standardized, providing reliable test data for a comprehensive study and evaluation of the sealing behavior of spring energy storage seals under different specifications and compression ratios. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the spring energy storage sealing ring leakage test fixture of this utility model.

[0013] Figure 2A cross-sectional view of the spring energy storage seal leakage test fixture.

[0014] Figure 3 This is a schematic diagram of the spring energy storage seal being tested installed in the spring energy storage seal leakage test fixture. Detailed Implementation

[0015] The following is combined with Figures 1-3 The embodiments of this utility model will be described in detail below.

[0016] A spring energy storage sealing ring leakage test fixture is characterized by comprising a middle layer cylinder 1, an upper disc 2 sealed and fixed at the upper end of the middle layer cylinder, and a lower plug 3 installed in the middle layer cylinder 1. A sealing cavity 4 is formed between the upper disc 2 and the lower plug 3. An air inlet 5 and an air outlet 6 are respectively opened on the upper disc 2 and connected to the sealing cavity 4. The spring energy storage sealing ring 100 under test is compressed in the sealing cavity 4 by the lower plug 3, sealing the end of the sealing cavity 4 near the air outlet 6. The axial position of the lower plug 3 in the middle layer cylinder 1 is adjustable.

[0017] The above-described spring energy storage sealing ring leakage test fixture has an upper disc 2 fixed to the upper end of the middle layer cylinder 1, and a lower plug 3 installed in the middle layer cylinder 1, forming a sealing cavity 4 between the upper disc 2 and the lower plug 3. The spring energy storage sealing ring 100 under test is compressed into the sealing cavity 4 by the lower plug 3, sealing the end of the sealing cavity 4 near the air outlet 6. During testing, the air inlet 5 is connected to the air pump, and the air pressure tester is inserted into the air outlet 6. The air pump is started to pump air into the sealing cavity 4, causing the air pressure in the sealing cavity 4 to rise, and the change in the air pressure tester value is observed, thus forming a leakage test for the spring energy storage sealing ring. Spring energy storage sealing rings with different cross-sectional dimensions and diameters can be set in the sealing cavity 4 to meet the needs of spring energy storage rings of different specifications. The leakage test requirement for the sealing ring is achieved by adjusting the axial position of the lower plunger 3 in the middle cylinder to regulate the compression of the tested spring energy storage sealing ring. This satisfies the leakage test requirements of the spring energy storage sealing ring under different compression conditions, enabling the airtightness testing of spring energy storage sealing rings of different specifications under different compression conditions. This improves the versatility and adaptability of the tooling, expands the range of test conditions, allows for rapid assembly and disassembly of the tested parts, and avoids repetitive positioning errors and potential clamping inconsistencies caused by frequent tooling changes. The test process is made more efficient, stable, and standardized, providing reliable test data for a comprehensive study and evaluation of the sealing behavior of spring energy storage sealing rings under different specifications and compression ratios.

[0018] The lower plug 3 is threadedly fitted into the middle layer cylinder 1. A radially arranged locking screw 7 is installed at the bottom of the middle layer cylinder 1, with the inner end of the locking screw 7 pressing against the lower plug 3. An internal hexagon blind hole 31 is formed at the center of the bottom surface of the lower plug 3. The lower plug 3 is threaded into the middle layer cylinder. A hexagonal wrench can be inserted into the internal hexagon blind hole 31 to rotate the lower plug 3, adjusting its axial position within the middle layer cylinder 1. This adjusts the compression of the tested spring energy storage sealing ring 100. After the lower plug 3 is properly positioned, the locking screw 7 is used to secure it, ensuring the stability of the lower plug 3's positioning within the middle layer cylinder 1 during the leakage test, thereby improving the reliability and safety of the test.

[0019] The lower end of the intermediate layer cylinder has two radially arranged radial planes 11 on its outer wall. These radial planes 11 are symmetrically arranged, and threaded through holes for engaging with the fastening screws 7 are formed inward from each radial plane 11. As can be seen from the attached drawings, the intermediate layer cylinder 1 is thinner at the radial plane 11, requiring a shorter fastening screw 7. This ensures that the inner end of the fastening screw 7 can be fastened to the lower plug 3, increasing the fastening force of the fastening screw 7 on the lower plug 3, thereby improving the positioning stability of the lower plug 3 within the intermediate layer cylinder.

[0020] The lower plunger 3 has an upwardly protruding ring 32 on its top surface, and an annular groove 21 corresponding to the ring 32 is opened on the bottom surface of the upper disc 2. There are multiple rings 32 arranged concentrically, and the rings 32 are inserted into the corresponding annular grooves 21 with a gap fit. The spring energy storage sealing ring 100 under test is placed on the upper plunger 3 and is located on the outer periphery of the outermost ring 32 or between adjacent rings 32. The air inlet 5 coincides with the center of the annular groove 21, and the air outlet 6 is opened on the outside of the annular groove 31 and is located on the outside of the spring energy storage sealing ring 100 under test. Multiple convex rings 32 are provided on the lower plug 3. The outermost convex ring 32 can be used to place the test spring energy storage sealing ring 100. The test spring energy storage sealing ring 100 can also be placed between adjacent convex rings 32 to meet the testing requirements of spring energy storage sealing rings of different specifications. The air inlet 5 coincides with the center of the annular groove 21. The air outlet 6 is set on the outer periphery of the annular groove 21 and is located on the outside of the test spring energy storage sealing ring 100. This ensures that the test spring energy storage sealing ring 100 can seal the end of the sealing cavity 4 near the air outlet 6 whether it is set on the outer periphery of the outermost convex ring 32 or between adjacent convex rings 32.

[0021] The air inlet 5 and air outlet 6 are radially aligned along the upper disk. The center of the air inlet 5 coincides with the center of the annular groove 21. After the air inlet 5 is opened, the opening position of the air outlet 6 can be quickly determined by utilizing the radial alignment of the air inlet 5 and the air outlet 6, thus improving the convenience of opening the hole.

[0022] The upper disc 2 and the middle cylinder 1 are connected by bolts. A sealing ring 12, pressed by the upper disc, is embedded on the top surface of the middle cylinder 1, and a sealing ring 12, pressed by the lower plug 3, is embedded on the inner wall. As shown in the attached drawings, the upper disc 3 covers the middle cylinder 1 and forms a seal between them through the sealing ring 12. The lower plug 3 is screwed into the middle cylinder 1 and forms a seal between them through the sealing ring 12, thus forming a sealed cavity 4 between the upper disc 2 and the lower plug 3. This ensures the sealing reliability of the sealed cavity 4, thereby ensuring the reliability of the spring energy storage sealing ring leakage test.

[0023] The technical solutions of the embodiments of this utility model have been fully described above with reference to the accompanying drawings. It should be noted that the described embodiments are only a part of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

Claims

1. A spring energized seal ring leak test fixture characterized by: It includes an intermediate cylinder, an upper disc sealed and fixed at the upper end of the intermediate cylinder, and a lower plug installed in the intermediate cylinder. A sealed cavity is formed between the upper disc and the lower plug. An air inlet and an air outlet are opened on the upper disc, which are respectively connected to the sealed cavity. The energy storage sealing ring of the spring under test is compressed in the sealed cavity by the lower plug, sealing the end of the sealed cavity near the air outlet. The axial position of the lower plug in the intermediate cylinder is adjustable.

2. The spring energized seal leakage test tooling of claim 1, wherein: The lower plug is threadedly fitted into the middle cylinder. The bottom of the middle cylinder is fitted with a radially arranged fastening screw. The inner end of the fastening screw is pressed against the lower plug. An internal hexagon blind hole is opened at the center of the bottom surface of the lower plug.

3. The spring energized seal leakage test tool of claim 2, wherein: The outer wall at the lower end of the middle layer cylinder has two radial planes arranged symmetrically, and threaded through holes that mate with fastening screws are opened from the radial planes inward.

4. The spring energized seal leakage test tooling of claim 1, wherein: The lower plunger has an upward-protruding ring on its top surface, and an annular groove corresponding to the ring is formed on the bottom surface of the upper disc. There are multiple rings arranged concentrically, and the rings are fitted into the corresponding annular grooves with a gap fit. The energy storage sealing ring of the spring under test is placed on the upper plunger and is located on the outer periphery of the outermost ring or between adjacent rings. The air inlet coincides with the center of the annular groove, and the air outlet is opened on the outside of the annular groove and is located on the outside of the energy storage sealing ring of the spring under test.

5. The spring energized seal leakage test tooling of claim 4, wherein: The air inlet and air outlet are aligned radially along the upper disk.

6. The spring energized seal leakage test tooling of claim 1, wherein: The upper disc and the middle cylinder are connected by bolts. A sealing ring pressed by the upper disc is embedded on the top surface of the middle cylinder, and a sealing ring pressed by the lower plug is embedded on the inner wall.

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