A kind of gasket fatigue strength test tool at room temperature

Abstract

The utility model provides a kind of fatigue strength test tool of sealing gasket normal temperature, belong to material performance test technical field, test tool includes adapter lever, connecting rod, upper pressing ring, clamping assembly, lower pressing ring, tool base and connecting base;Adapter lever upper end is assembled in the output end of vertical reciprocating mechanism, lower end is detachably connected with the upper end of connecting rod;The upper end of clamping assembly is detachably connected with the lower end of connecting rod;Tool base upper end has accommodating cavity, lower pressing ring is inserted into accommodating cavity, and the flanging of lower pressing ring is installed in accommodating cavity mouth portion, and upper pressing ring is installed in the upper end of tool base;Connecting base is fixed on test bench, and the upper end of connecting base is detachably connected with the lower end of tool base.This test tool can replace reciprocating fatigue strength test of sealing gasket by artificial, through the cooperation between clamping assembly, tool base and upper pressing ring, the edge of sealing gasket is fixed, and fatigue strength test is carried out to sealing gasket by the movement of connecting rod.

Description

Technical Field

[0001] This utility model belongs to the field of material performance testing technology, specifically relating to a tooling for testing the fatigue strength of a sealing gasket at room temperature. Background Technology

[0002] Gaskets are widely used in machinery, aerospace, and aviation to prevent the leakage of liquids or gases. During testing, gaskets undergo repeated compression and rebound, making their cyclic fatigue strength a crucial indicator of their performance. Currently, the cyclic fatigue strength of existing gaskets is tested manually, which is subject to numerous influencing factors, resulting in poor test results, low efficiency, and increased costs. Utility Model Content

[0003] The purpose of this invention is to solve the problem of low efficiency in the existing manual measurement of the reciprocating fatigue strength of sealing gaskets, and to provide a tooling for testing the fatigue strength of sealing gaskets at room temperature.

[0004] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0005] A fixture for testing the fatigue strength of a sealing gasket at room temperature is provided. The sealing gasket has a central hole. The testing fixture includes an adapter rod, a connecting rod, a fixture base, a connecting base, a clamping assembly, an upper pressure ring, and a lower pressure ring. The upper end of the adapter rod is mounted on the output end of a vertical reciprocating motion mechanism. The upper end of the connecting rod is detachably connected to the lower end of the adapter rod. The upper end of the fixture base has a receiving cavity, and the lower end has a connecting column. The connecting base is fixed on the test bench, and the lower end of the connecting column is fixedly connected to the connecting base. The clamping assembly is fixedly connected to the lower end of the connecting rod for fixing the middle part of the sealing gasket. The lower pressure ring includes a lower cylindrical part and an outwardly extending flange connected to the upper end of the lower cylindrical part. The outer diameter of the lower cylindrical part matches the shape of the receiving cavity. The lower cylindrical part is inserted into the receiving cavity, and the outwardly extending flange is mounted at the opening of the receiving cavity. The upper pressure ring includes an upper cylindrical part and an inwardly extending flange connected to the upper end of the upper cylindrical part. The inner diameter of the inwardly extending flange is smaller than the outer diameter of the sealing gasket. The upper pressure ring is fixedly connected to the fixture base through the upper cylindrical part. The upper and lower pressure rings are used to fix the edge of the sealing gasket.

[0006] Furthermore, the lower end of the connecting rod has a first external thread; the clamping assembly includes a pressure cap, a tray, and a locking nut that matches the screw; the pressure cap includes a base plate and a screw disposed on the underside of the base plate, the base plate has a screw hole in the center, and the pressure cap is threadedly connected to the lower end of the connecting rod; the tray has a through hole in the middle with a diameter larger than the screw diameter; the screw passes through the center hole of the sealing gasket and the through hole of the tray in sequence and is threadedly connected to the locking nut.

[0007] Furthermore, the inner wall of the upper cylinder of the upper pressure ring has an internal thread, and the outer wall of the tooling base has a second external thread that matches the internal thread.

[0008] Furthermore, the testing fixture also includes a limiting block, which is L-shaped. The bottom surface of the limiting block is used to fit with the upper end of the fixture base, the side surface is used to fit with the connecting rod, and the upper end is used to fit with the lower edge of the adapter rod. The limiting block is used to adjust the distance between the base and the adapter rod.

[0009] Furthermore, the lower end of the adapter rod has a first blind hole and a first pin hole that radially penetrates the first blind hole; the upper end of the connecting rod has a second pin hole, the upper end of the connecting rod extends into the first blind hole, and is connected by inserting a first locking pin into the first pin hole and the second pin hole.

[0010] Furthermore, the top surface of the connecting base has an upward-opening connecting cylinder, which is used for detachable connection with the connecting column of the tooling base.

[0011] Furthermore, the connecting cylinder has a third pin hole that extends radially through the connecting cylinder, and the connecting post has a fourth pin hole. The connecting post is inserted into the connecting cylinder and connected by a second locking pin inserted into the third pin hole and the fourth pin hole.

[0012] Furthermore, the upper half of the connecting column has a third external thread, and the connecting column is equipped with a fastening nut to improve assembly stability.

[0013] Furthermore, a semi-circular groove is provided on the side of the limiting block that fits with the connecting rod, and the side wall of the connecting rod is installed in the semi-circular groove.

[0014] The advantages of this utility model are:

[0015] The testing fixture designed in this utility model can replace manual labor in performing reciprocating fatigue strength tests on gaskets. Through its modular design, it allows for easy replacement and testing of various material samples, significantly improving testing efficiency and reducing time costs. The edge of the gasket is fixed by the cooperation of the clamping assembly, fixture base, and upper pressure ring. The connecting rod drives the clamping assembly to reciprocate, thereby performing fatigue strength tests on the gasket. Attached Figure Description

[0016] The features and advantages of this invention will become more readily understood from the following description with reference to the accompanying drawings, which are not drawn to scale and some features are enlarged or reduced to show details of specific parts.

[0017] Figure 1 This is a schematic diagram of the sealing gasket structure in an embodiment of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of the fatigue strength testing fixture for the sealing gasket at room temperature in an embodiment of this utility model;

[0019] Figure 3This is a top view of the fatigue strength testing fixture for the sealing gasket at room temperature in this utility model;

[0020] Figure 4 yes Figure 3 DD section view in the middle;

[0021] Figure 5 This is the front view of the fatigue strength testing fixture for the sealing gasket at room temperature in this utility model.

[0022] In the diagram: 1-Connecting base; 2-Tooling base; 3-Fasting nut; 4-Second locking pin; 5-Lower pressure ring; 6-Sealing gasket; 7-Pattern; 8-Pressure cap; 9-Locking nut; 10-Upper pressure ring; 11-Connecting rod; 12-Fixing nut; 13-Adapter rod; 14-Limiting block; 15-First locking pin. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings and exemplary embodiments thereof. It should be noted that the following detailed description of the present invention is for illustrative purposes only and is not intended to limit the scope of the invention.

[0024] like Figure 1 , 2 As shown, the present invention provides a fixture for testing the fatigue strength of a sealing gasket at room temperature. The sealing gasket 6 has a central hole. The testing fixture includes an adapter rod 13, a connecting rod 11, an upper pressure ring 10, a clamping assembly, a lower pressure ring 5, a fixture base 2, and a connecting base 1.

[0025] like Figure 2 , 3 As shown in Figure 4, the upper end of the adapter rod 13 is mounted on the output end of the vertical reciprocating motion mechanism. The upper end of the connecting rod 11 is detachably connected to the lower end of the adapter rod 13. The upper end of the tooling base 2 has a receiving cavity, and the lower end has a connecting column. The connecting base 1 is fixed on the test bench, and the lower end of the connecting column is fixedly connected to the connecting base 1. The clamping assembly is fixedly connected to the lower end of the connecting rod 11 and is used to fix the middle part of the sealing gasket 6.

[0026] like Figure 4 As shown, the lower pressure ring 5 includes a lower cylinder and an outer flange extending outward from the upper end of the lower cylinder. The outer diameter of the lower cylinder matches the shape of the receiving cavity. The lower cylinder is inserted into the receiving cavity, and the outer flange is mounted on the opening of the receiving cavity.

[0027] The upper pressure ring 10 includes an upper cylindrical portion and an inner flange extending inward from the upper end of the upper cylindrical portion. The inner diameter of the inner flange is smaller than the outer diameter of the sealing gasket 6. The upper pressure ring 10 is fixedly connected to the tooling base 2 through the upper cylindrical portion. The upper pressure ring 10 and the lower pressure ring 5 are used to fix the edge of the sealing gasket 6.

[0028] The clamping assembly design enables rapid replacement of sealing gaskets 6 made of various materials, improves the efficiency of fatigue strength testing of batch sealing gaskets 6, and fixes the sealing gaskets 6 on the connecting rod 11. When the vertical reciprocating motion mechanism drives the clamping assembly to move up and down, the unfixed part of the sealing gasket 6 will be pulled back and forth with the movement of the test bench, thereby measuring the fatigue strength of the sealing gasket 6.

[0029] The test fixture designed in this embodiment can replace manual labor in performing reciprocating fatigue strength tests on the sealing gasket 6. Through modular design, it is easy to replace and test various materials, significantly improving testing efficiency and reducing time costs. The edge of the sealing gasket 6 is fixed by the cooperation between the clamping assembly, the fixture base 2, and the upper pressure ring 10. The clamping assembly is driven to reciprocate by the connecting rod 11, thereby performing fatigue strength tests on the sealing gasket 6.

[0030] like Figure 4 As shown, the lower end of the connecting rod 11 has a first external thread; the clamping assembly includes a pressure cap 8, a tray 7, and a locking nut 9 that matches the screw; the pressure cap 8 includes a base plate and a screw located on the underside of the base plate, with a screw hole in the center of the base plate, and the pressure cap 8 is threadedly connected to the lower end of the connecting rod 11; the tray 7 has a through hole in the middle with a diameter larger than the screw diameter; the screw passes through the center hole of the sealing gasket 6 and the through hole of the tray in sequence, and is threadedly connected to the locking nut. This facilitates the removal of the clamping assembly from the connecting rod 11 and the replacement of the sealing gasket 6.

[0031] The inner wall of the upper cylinder of the upper pressure ring 10 has an internal thread, and the outer wall of the tooling base 2 has a second external thread that matches the internal thread.

[0032] like Figure 2 , 4 As shown in Figure 5, the test fixture also includes a limiting block 14, which is "L" shaped. The bottom surface of the limiting block 14 is used to fit with the upper end of the fixture base 2, the side surface is used to fit with the connecting rod 11, and the upper end is used to fit with the lower edge of the adapter rod 13. The limiting block 14 is used to adjust the distance between the base and the adapter rod 13.

[0033] like Figure 4 , 5 As shown, the lower end of the adapter rod 13 has a first blind hole and a first pin hole that radially penetrates the first blind hole; the upper end of the connecting rod 11 has a second pin hole, the upper end of the connecting rod 11 extends into the first blind hole, and is connected by inserting the first locking pin 15 into the first pin hole and the second pin hole, so as to detachably fix the connecting rod 11 to the adapter rod 13.

[0034] like Figure 4 , 5As shown, the top surface of the connecting base 1 has an upward-opening connecting cylinder, which is used for detachable connection with the connecting column of the tooling base 2.

[0035] Specifically, the connecting cylinder has a third pin hole that penetrates the connecting cylinder radially, and the connecting column has a fourth pin hole. The connecting column is inserted into the connecting cylinder and connected by a second locking pin 4 inserted into the third and fourth pin holes. The tooling base 2 and the connecting base 1 are detachably connected by the second locking pin 4 for easy assembly and disassembly.

[0036] like Figure 4 As shown, the upper half of the connecting column has a third external thread, and a fastening nut 3 is provided on the connecting column to improve assembly stability. By installing the fastening nut 3 on the fixture base plate, the installation of the fixture base plate and the connecting base 1 is made more stable, improving the stability of the entire test fixture and the verticality during installation, thus making the measurement data more accurate.

[0037] like Figure 2 As shown, a semi-circular groove is provided on the side of the limiting block 14 that fits against the connecting rod 11, and the side wall of the connecting rod 11 is installed in the semi-circular groove. This makes the limiting block 14 and the connecting rod 11 fit more tightly, and more accurately adjusts the position between the base and the adapter rod 13, thereby improving the assembly accuracy of the test fixture and ultimately improving the test accuracy of the sealing gasket 6.

[0038] The following is the assembly and testing method for the test fixture provided in this example:

[0039] Step 1: Install the connecting base 1 and fix it on the test bench, ensuring that it is level and stable.

[0040] Step 2: Connect the tooling base 2 to the fastening nut 3.

[0041] Step 3: Insert the tooling base 2 into the connecting cylinder of the connecting base 1, align the first mounting pin hole and the second mounting pin hole, insert the second locking pin 4, and tighten the fastening nut 3. Check the fit of each end face to ensure that the lower end of the tooling base 2 is vertically installed in the connecting cylinder.

[0042] Step 4: Assemble the sample. Apply lubricating oil evenly to the surfaces of tray 7 and sealing gasket 6, and embed them into the screws of the pressure cap 8, ensuring that all positioning surfaces are fully fitted. Then tighten the locking nut 9 onto the pressure cap 8 to assemble the clamping assembly.

[0043] Step 5: Assemble the pressure ring 5 into the receiving cavity at the upper end of the tooling base 2, ensuring that all positioning surfaces are tightly fitted.

[0044] Step 6: Insert the clamping assembly into the hole of the upper pressure ring 10, ensuring its position is accurate. Connect the upper pressure ring 10 to the tooling base 2 and assemble it into place using a torque wrench.

[0045] Step 7: Connect the connecting rod 11 to the end face of the pressure cap 8 in the clamping assembly via thread, ensuring that the end face is flush with the assembly.

[0046] Step 8: Connect the adapter rod 13 to the fixing nut 12, and assemble the adapter rod 13 to the output end of the vertical reciprocating motion mechanism, and tighten the fixing nut 12.

[0047] Step 9: Place the limiting block 14 into the end face of the upper pressure ring 10, adjust the height of the sensor connector on the test bench, and check the end face fit to ensure accurate positioning.

[0048] Step 10: Insert the first locking pin 15 into the first pin hole and the second pin hole, remove the limit block 14, and complete the installation of the test fixture.

[0049] Step 11: Set experimental parameters, start the experimental equipment, record fatigue strength data, and conduct analysis and evaluation.

[0050] Step 12: Replace the sample. When it is necessary to test the sealing gasket 6 of different materials, remove the first locking pin 15, loosen the upper pressure ring 10 and the connecting rod 11, replace the sealing gasket 6, reinstall and fix it, and carry out the next round of testing.

[0051] Finally, it should be noted that the features mentioned and / or shown in the above description of exemplary embodiments of the present invention can be combined in the same or similar manner with one or more other embodiments, combined with features in other embodiments, or substituted for corresponding features in other embodiments. These combined or substituted technical solutions should also be considered as included within the protection scope of the present invention.

Claims

1. A fixture for testing the fatigue strength of a sealing gasket at room temperature, wherein the sealing gasket (6) has a central hole, characterized in that, The test fixture includes: The upper end of the adapter rod (13) is mounted on the output end of the vertical reciprocating motion mechanism; The upper end of the connecting rod (11) is detachably connected to the lower end of the adapter rod (13); Tooling base (2) has a receiving cavity at the upper end and a connecting column at the lower end; The connecting base (1) is fixed on the test bench, and the lower end of the connecting column is fixedly connected to the connecting base (1); A clamping assembly is fixedly connected to the lower end of the connecting rod (11) for fixing the middle part of the sealing gasket (6); The lower pressure ring (5) includes a lower cylinder and an outer flange extending outward from the upper end of the lower cylinder. The outer diameter of the lower cylinder matches the shape of the receiving cavity. The lower cylinder is inserted into the receiving cavity, and the outer flange is mounted on the opening of the receiving cavity. The upper pressure ring (10) includes an upper cylindrical part and an inner flange extending inward from the upper end of the upper cylindrical part. The inner diameter of the inner flange is smaller than the outer diameter of the sealing gasket (6). The upper pressure ring (10) is fixedly connected to the tooling base (2) through the upper cylindrical part. The upper pressure ring (10) and the lower pressure ring (5) are used to fix the edge of the sealing gasket (6).

2. The gasket room temperature fatigue strength test tooling of claim 1, wherein, The lower end of the connecting rod (11) has a first external thread; The clamping assembly includes: The pressure cap (8) includes a base plate and a screw rod disposed on the underside of the base plate. The base plate has a screw hole in the center. The pressure cap (8) is threaded to the lower end of the connecting rod (11). The tray (7) has a through hole in the middle with a diameter larger than that of the screw; And a locking nut (9) that matches the screw; The screw passes through the center hole of the sealing gasket (6) and the through hole of the tray in sequence, and is threadedly connected to the locking nut.

3. The fixture for testing the fatigue strength of a sealing gasket at room temperature according to claim 1, characterized in that, The upper cylinder of the upper pressure ring (10) has an internal thread on its inner wall, and the outer wall of the tooling base (2) has a second external thread that matches the internal thread.

4. The gasket room temperature fatigue strength test tooling of claim 1, wherein, The test fixture also includes a limiting block (14), which is "L" shaped. The bottom surface of the limiting block (14) is used to fit with the upper end of the fixture base (2), the side surface is used to fit with the connecting rod (11), and the upper end is used to fit with the lower edge of the adapter rod (13). The limiting block (14) is used to adjust the distance between the base and the adapter rod (13).

5. The gasket room temperature fatigue strength test tooling of claim 1, wherein, The lower end of the adapter rod (13) has a first blind hole and a first pin hole that radially penetrates the first blind hole; the upper end of the connecting rod (11) has a second pin hole, the upper end of the connecting rod (11) extends into the first blind hole, and is connected by inserting the first pin hole and the second pin hole through the first locking pin (15).

6. The fixture for testing the fatigue strength of a sealing gasket at room temperature according to claim 1, characterized in that, The top surface of the connecting base (1) has an upward-opening connecting cylinder, which is used for detachable connection with the connecting column of the tooling base (2).

7. The fixture for testing the fatigue strength of a sealing gasket at room temperature according to claim 6, characterized in that, The connecting cylinder has a third pin hole that penetrates the connecting cylinder radially, and the connecting post has a fourth pin hole. The connecting post is inserted into the connecting cylinder and connected by a second locking pin (4) inserted into the third pin hole and the fourth pin hole.

8. The gasket room temperature fatigue strength test tooling of claim 1, wherein, The upper half of the connecting column has a third external thread, and the connecting column is provided with a fastening nut (3) to improve the assembly stability.

9. The fixture for testing the fatigue strength of a sealing gasket at room temperature according to claim 4, characterized in that, The limiting block (14) has a semi-circular groove on the side that fits against the connecting rod (11), and the side wall of the connecting rod (11) is installed in the semi-circular groove.

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