A test fixture for testing the friction level of o-rings

Abstract

The utility model provides a kind of test tool for testing the friction level of O type sealing ring belongs to friction test tool technical field, test tool includes tool base plate, test pin, test body, adapter and adapter rod;Tool base plate bottom has locating groove;Test body has the pin hole of horizontal arrangement, and the inner wall of pin hole is equipped with the annular groove for placing O type sealing ring, and test body can be detachably connected in locating groove;Test pin is movably arranged in pin hole;Adapter is installed on the joint of test equipment by second threaded hole;Adapter rod is installed in the lower end of adapter, and test pin is vertically installed on adapter rod using connecting bolt;Test equipment provides the same horizontal pressure as the installation direction of test pin, drives test pin to move, to measure the dynamic friction of O type sealing ring and test pin in horizontal direction.

Description

Technical Field

[0001] This utility model belongs to the technical field of friction testing fixtures, specifically relating to a testing fixture for testing the friction level of O-ring seals. Background Technology

[0002] O-rings, due to their excellent sealing performance, are widely used in critical fields such as hydraulic systems, pneumatic systems, the automotive industry, and aerospace, primarily to prevent fluid or gas leakage. Their performance, especially their frictional characteristics, directly determines the sealing effect and service life of equipment. Friction force, as a key parameter, needs precise control: too much friction accelerates ring wear, leading to seal failure; too little friction may result in ineffective sealing and leakage. Therefore, in-depth research into the frictional characteristics of O-rings is crucial for improving equipment reliability and operating efficiency.

[0003] Some O-rings are used in dynamic sealing scenarios with relative motion along the axial direction. Traditional tooling for studying O-ring friction cannot accurately simulate the actual working conditions of O-rings, nor can it accurately record the friction between the sealed part and the O-ring. Utility Model Content

[0004] The purpose of this invention is to solve the technical problem that existing tooling cannot accurately simulate the relative movement of O-rings along the axial direction, and to provide a test tooling for testing the frictional force level of O-rings.

[0005] To achieve the above objectives, the technical solution provided by this utility model is as follows:

[0006] A test fixture for testing the frictional force level of an O-ring seal is provided, comprising a fixture base plate, a test pin, a test body, an adapter, and an adapter rod. The fixture base plate is fixedly mounted on a test bench and has a positioning groove on its upper surface. The test body has a horizontally positioned pin hole, and the inner wall of the pin hole has an annular groove for placing the O-ring seal. The test body is detachably connected to the positioning groove. The test pin is movably disposed within the pin hole. The upper end face of the adapter has a first mounting hole, through which the adapter is mounted on the connector of a reciprocating device. The adapter rod is vertically mounted on the lower end of the adapter, and the lower end of the adapter rod is perpendicularly connected to the test pin. A pressure recorder includes a pressure sensor disposed within the first mounting hole for measuring the horizontal force exerted by the test pin along the installation direction.

[0007] Furthermore, the lower end of the adapter rod has a second mounting hole, and one end of the test pin has a first threaded hole; the test pin is fixedly connected to the lower end of the adapter rod by a connecting bolt.

[0008] Furthermore, the lower end of the adapter rod has two planes parallel to the end face of the test pin, and one end of the test pin abuts against one of these planes.

[0009] Furthermore, the side of the tooling base plate has positioning holes that communicate with the positioning groove, and the test body is fixed to the tooling base plate by positioning bolts passing through the positioning holes.

[0010] Furthermore, the O-rings have multiple size specifications; the test fixture includes multiple test bodies with different pin hole sizes, the annular groove sizes on the inner walls of the pin holes of the test bodies are not equal, and the annular grooves of multiple sizes correspond one-to-one with the sizes of multiple O-rings; multiple pin holes correspond to multiple test pins.

[0011] Furthermore, the lower end face of the adapter has a second threaded hole, and the upper end of the adapter rod has an external thread that mates with the second threaded hole. The adapter rod is threadedly connected to the adapter.

[0012] Furthermore, the adapter has a limiting hole on its side that communicates with the second threaded hole. The limiting hole is used to install a limiting screw to restrict the rotation of the adapter rod relative to the adapter.

[0013] Furthermore, one end of the positioning groove has an opening to facilitate the installation of the test body.

[0014] Furthermore, the reciprocating moving device is a reciprocating friction testing machine, used to drive the test pin to reciprocate along the pin hole.

[0015] The advantages of this utility model are:

[0016] 1. The test fixture designed in this utility model connects the test fixture to the test equipment through an adapter and an adapter rod. The test equipment can provide horizontal pressure to drive the test pin to move horizontally relative to the O-ring, simulating the actual working conditions. This makes the O-ring test more in line with the actual use conditions, improving the accuracy and reliability of the test.

[0017] 2. The test fixture designed in this utility model, through modular design, can be adjusted and repaired in a timely manner. It can also replace test bodies and test pins of different specifications to test O-rings of different specifications. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of a test fixture used to test the frictional force level of an O-ring seal in an embodiment of this utility model;

[0020] Figure 2This is a front view of the test fixture used to test the frictional force level of O-ring seals in this embodiment of the present invention;

[0021] Figure 3 This is a top view of the test fixture used to test the frictional force level of O-ring seals in this embodiment of the present invention;

[0022] Figure 4 yes Figure 3 The CC view in the middle.

[0023] In the diagram: 1-Tooling base plate; 2-Test body; 3-O-ring seal; 4-Test pin; 5-Positioning bolt; 6-Adapter; 7-Adapter rod; 8-Connecting bolt; 9-Limit screw. Detailed Implementation

[0024] 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 is for illustrative purposes only and is not intended to limit the scope of the invention.

[0025] like Figure 1 As shown, this utility model provides a test fixture for testing the frictional force level of O-ring seals, including a fixture base plate 1, a test pin 4, a test body 2, an adapter 6, and an adapter rod 7.

[0026] like Figure 2 , 4 As shown, the tooling base plate 1 is fixedly installed on the test bench. The upper surface has a positioning groove. The four corners of the tooling base plate 1 are installed on the test bench by mounting bolts, providing support for the entire test tooling.

[0027] like Figure 1 , 4 As shown, the test body 2 has a horizontally arranged pin hole, and the inner wall of the pin hole is provided with an annular groove for placing the O-ring seal 3. The test body 2 can be detachably connected to the positioning groove.

[0028] like Figure 1 , 2 As shown, the test pin 4 is movably set in the pin hole; the test pin 4 passes through the inner ring of the O-ring 3 to conduct a horizontal friction test.

[0029] like Figure 1 , 3 As shown, the upper end face of the adapter 6 has a first mounting hole, and the adapter 6 is mounted on the connector of the reciprocating mobile device through the first mounting hole.

[0030] like Figure 4 As shown, the adapter rod 7 is vertically installed at the lower end of the adapter 6, and the lower end of the adapter rod 7 is vertically connected to the test pin 4.

[0031] The pressure recorder includes a pressure sensor disposed within a first mounting hole, used to measure the horizontal force exerted on the test pin 4 along the mounting direction. A reciprocating moving device provides the horizontal force on the test pin 4 along the mounting direction, causing the test pin 4 to move, thereby measuring the dynamic frictional force between the O-ring 3 and the test pin 4 in the horizontal direction.

[0032] The test fixture designed in this embodiment connects to the test equipment via adapter 6 and adapter rod 7. The test equipment can provide horizontal pressure, causing the test pin 4 to move horizontally relative to the O-ring, simulating actual working conditions. This makes the O-ring test more closely match actual working conditions, improving the accuracy and reliability of the test.

[0033] like Figure 4 As shown, in this embodiment, the detachable connection between the adapter rod 7 and the test pin 4 is achieved as follows: the lower end of the adapter rod 7 has a second mounting hole, and one end of the test pin 4 has a first threaded hole; the test pin 4 is fixedly connected to the lower end of the adapter rod 7 by a connecting bolt 8.

[0034] like Figure 4 As shown, the lower end of the adapter rod 7 has two planes parallel to the end face of the test pin 4, and one end of the test pin 4 abuts against one of these planes. The end face of the test pin 4 can fit against the plane, which facilitates the installation of the test pin 4 and ensures that the test pin 4 can be installed perpendicular to the adapter rod 7.

[0035] like Figure 3 , 4 As shown, in this embodiment, the test body 2 is detachably connected to the positioning groove in the following way: the side of the tooling base plate 1 has a positioning hole that communicates with the positioning groove, and the test body 2 is fixed to the tooling base plate 1 by the positioning bolt 5 passing through the positioning hole.

[0036] The O-ring 3 has multiple sizes; the test fixture includes multiple test bodies 2 with different pin hole sizes, the annular groove sizes on the inner wall of the pin hole of the test body 2 are not equal, and the annular grooves of multiple sizes correspond one-to-one with the sizes of multiple O-rings 3; multiple pin holes correspond to multiple test pins 4.

[0037] This embodiment improves testing efficiency. Its modular design allows for timely adjustment and maintenance of the tooling, and enables quick replacement of test bodies 2 and test pins 4 of different specifications for testing O-rings of varying sizes. Installation and fixation via positioning bolts 5 and connecting bolts 8 further simplify the replacement and installation of test bodies 2 and test pins 4, reducing time and costs.

[0038] like Figure 4As shown, the lower end face of the adapter 6 has a second threaded hole, and the upper end of the adapter rod 7 has an external thread that mates with the second threaded hole. The adapter rod 7 is threadedly connected to the adapter 6. Through the threaded engagement, the adapter rod 7 can be quickly installed and fixed on the adapter 6, improving the efficiency of installation and disassembly.

[0039] like Figure 3 As shown, the adapter 6 has a limiting hole on its side that communicates with the second threaded hole. The limiting hole is used to install the limiting screw 9 to restrict the rotation of the adapter rod 7 relative to the adapter 6. The distance between the adapter rod 7 and the tooling base plate 1 can be adjusted through the limiting hole to align the mounting hole on it with the first threaded hole on the test pin 4, so that the test pin 4 is vertically mounted on the adapter rod 7.

[0040] like Figure 3 As shown, one end of the positioning groove has an opening to facilitate the installation of the test body 2. The lower end of the test body 2 can slide into the positioning groove from the side, and the positioning bolt 5 passes through the positioning hole and abuts against the side of the test body 2, fixing it in the positioning groove. The positioning hole is also a threaded hole.

[0041] The reciprocating device is a reciprocating friction testing machine, used to drive the test pin 4 to reciprocate along the pin hole.

[0042] The following describes the assembly and use of the experimental fixture provided by this utility model:

[0043] Step 1: Install fixture base plate 1 and fix fixture base plate 1 on the test bench, ensuring that it is level and stable.

[0044] Step 2: After applying lubricating oil to the annular groove on the test body 2, rotate the O-ring 3 into the annular groove of the test body 2, ensuring that it is in the correct position and not loose.

[0045] Step 3: Apply lubricant to the test pin 4 and insert it into the pin hole of the test body 2, controlling the exposed length of the test pin 4. Ensure good contact between the test pin 4 and the O-ring 3.

[0046] Step 4: Install the test body 2. Place the test body 2 in the positioning groove of the tooling base plate 1, ensuring that it is in close contact with the positioning surface in the positioning groove. Then use the positioning bolts 5 to fix the test body 2 on the tooling base plate 1, ensuring that its position is accurate and there is no looseness.

[0047] Step 5: Connect adapter 6 to the connector of the reciprocating friction testing machine, ensuring that its position is accurate and there is no looseness.

[0048] Step 6: After adjusting the position of the adapter rod 7 and the conversion connector to the test pin 4, use the connecting bolt 8 to lock the adapter rod 7 and the test pin 4 to ensure that the position is accurate and there is no looseness, and install the limit screw 9 of the adapter rod 7.

[0049] Step 7: Start the reciprocating friction testing machine, apply horizontal pressure, simulate the friction force in actual working conditions, record the friction force data, and conduct analysis and evaluation.

[0050] Step 8: Replace the sample. When it is necessary to test O-rings 3 of different specifications or materials, loosen the positioning bolts 5 and connecting bolts 8, replace the test body 2, O-rings 3 and test pins 4, reinstall and fix them, and carry out the next round of testing.

[0051] This testing fixture allows for quick replacement of O-rings 3 of various specifications and materials, test bodies 2, and test pins 4. The test body 2 is tightly fitted into the positioning groove and locked in place by side positioning bolts 5. The test pin 4 is then secured by connecting bolts 8. This design can meet the dynamic testing requirements of test bodies 2 of various specifications and materials, test pins 4, and O-rings 3 of various materials under horizontal pressure.

[0052] 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 testing fixture for testing the frictional force level of O-ring seals, characterized in that, include: The tooling base plate (1) is fixedly installed on the test bench, and the upper surface has a positioning groove; The test body (2) has a horizontally set pin hole, and the inner wall of the pin hole is provided with an annular groove for placing an O-ring seal (3). The test body (2) is detachably connected to the positioning groove. The test pin (4) is movably disposed within the pin hole; The adapter (6) has a first mounting hole on its upper end face, and the adapter (6) is mounted on the connector of the reciprocating mobile device through the first mounting hole; The adapter rod (7) is vertically installed at the lower end of the adapter (6), and the lower end of the adapter rod (7) is vertically connected to the test pin (4); And a pressure recorder, the pressure recorder including a pressure sensor disposed in the first mounting hole, for measuring the horizontal force of the test pin (4) along the mounting direction.

2. The test fixture for testing the frictional force level of O-ring seals according to claim 1, characterized in that, The lower end of the adapter rod (7) has a second mounting hole, and one end of the test pin (4) has a first threaded hole; the test pin (4) is fixedly connected to the lower end of the adapter rod (7) by a connecting bolt (8).

3. The test fixture for testing the frictional force level of O-ring seals according to claim 1, characterized in that, The lower end of the adapter rod (7) has two planes parallel to the end face of the test pin (4), and one end of the test pin (4) abuts against one of the planes.

4. The test fixture for testing the frictional force level of O-ring seals according to claim 1, characterized in that, The tooling base plate (1) has a positioning hole on its side that communicates with the positioning groove. The test body (2) is fixed to the tooling base plate (1) by a positioning bolt (5) passing through the positioning hole.

5. The test fixture for testing the frictional force level of O-ring seals according to claim 1, characterized in that, The O-ring (3) has multiple sizes; The test fixture includes multiple test bodies (2) with different pin hole sizes. The annular groove sizes of the inner walls of the pin holes of the test bodies (2) are not equal. The annular grooves of multiple sizes correspond one-to-one with the sizes of multiple O-rings (3). The multiple pin holes correspond to multiple test pins (4).

6. The test fixture for testing the frictional force level of O-ring seals according to claim 1, characterized in that, The adapter (6) has a second threaded hole on its lower end face, and the adapter rod (7) has an external thread that mates with the second threaded hole on its upper end. The adapter rod (7) is threadedly connected to the adapter (6).

7. The test fixture for testing the frictional force level of O-ring seals according to claim 6, characterized in that, The adapter (6) has a limiting hole on its side that communicates with the second threaded hole. The limiting hole is used to install a limiting screw (9) to restrict the adapter rod (7) from rotating relative to the adapter (6).

8. The test fixture for testing the frictional force level of O-ring seals according to claim 1, characterized in that, The positioning groove has an opening at one end, which facilitates the installation of the test body (2).

9. The test fixture for testing the frictional force level of O-ring seals according to claim 1, characterized in that, The reciprocating mobile device is a reciprocating friction testing machine, used to drive the test pin (4) to reciprocate along the pin hole.

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