Annular sealing ring tensile property test tool for tensile testing machine

Abstract

The utility model discloses an annular sealing ring tensile property testing tool for a tensile testing machine, which belongs to the technical field of mechanical property testing and comprises a shaft wheel assembly I, a shaft wheel assembly II, a fixing device and a gear belt. The arbor wheel assembly I is fixed below a fixed cross beam of the tensile testing machine, the arbor wheel assembly II is fixed above a movable cross beam of the tensile testing machine, the fixing device is fixed on a base of the tensile testing machine, and the gear belt is connected with the arbor wheel assembly I, the arbor wheel assembly II and the fixing device. When the tensile testing device is used for carrying out tensile testing on the annular sealing ring, the tensile testing machine controls the movable cross beam to move up and down, so that the tensile stress change of the annular sealing ring is realized; the gear belt rotates to drive the upper gear disc and the lower gear disc to rotate so as to drive the upper shaft wheel and the lower shaft wheel to rotate, the upper shaft wheel and the lower shaft wheel rotate to drive the annular sealing ring to rotate, different positions of the annular sealing ring are in contact with the upper shaft wheel and the lower shaft wheel, stress concentration is avoided, and testing reliability is improved.

Description

Technical Field

[0001] This utility model belongs to the field of mechanical performance testing technology, specifically relating to a testing fixture for the tensile properties of annular sealing rings. Background Technology

[0002] Rubber or plastic sealing rings undergo stretching or bending deformation during assembly and use. Excessive deformation can damage the sealing ring, leading to seal failure. Currently, there are limited methods for characterizing the tensile properties of sealing rings. Typically, standard specimens made from the raw materials used in the sealing ring are prepared for characterization testing to estimate the tensile properties of the sealing ring from the perspective of material properties; or tensile testing machines are used for characterization, such as... Figure 1 As shown, the main structure of the tensile testing machine includes a fixed crossbeam, a movable crossbeam, a testing machine base, a displacement measuring device, a fixed crossbeam clamp connection hole, a movable crossbeam clamp connection hole, and a force sensor. When characterizing the specimen, two parallel round bars are fixed on the testing machine base and the movable crossbeam, and a simple tensile test is performed by placing the sealing ring on the round bars. However, in actual operation, the material properties are difficult to accurately reflect the deformability of the sealing ring product; on the other hand, during the simple tensile test of the sealing ring, stress concentration exists in the contact area between the sealing ring and the round bars, which cannot truly reflect the tensile strength and elongation of the sealing ring. Summary of the Invention

[0003] The technical problem to be solved by this utility model is to provide a test fixture for testing the tensile properties of annular sealing rings in a tensile testing machine, which can assess the tensile mechanical properties of the sealing rings, such as tensile strength and elongation, while avoiding stress concentration.

[0004] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: a testing fixture for the tensile properties of annular sealing rings, such as... Figure 3 , Figure 4 , Figure 5 , Figure 6 As shown, the system includes wheel I, wheel II, and a fixing device. Wheel I is mounted on the fixed crossbeam of the testing machine, wheel II is mounted on the movable crossbeam of the testing machine, and the fixing device is mounted on the base of the testing machine. Wheel I has an upper wheel 11, and wheel II has a lower wheel 17. The upper wheel 11 and lower wheel 17 are used to install annular sealing rings. The upper and lower wheels are connected to the clamping holes of the testing machine crossbeam in a straight line perpendicular to the horizontal plane to ensure that the test force measured by the force sensor on the fixed crossbeam of the testing machine is the tensile force on the sample. Gear discs are respectively provided on wheel I and the fixing device. Gear belts are mounted on the gear discs. The two ends of the gear belts are fixedly mounted on wheel II. Wheel I and the fixing device are connected by the gear belts.

[0005] This utility model relates to a tensile performance testing fixture for annular seals in a tensile testing machine, comprising a shaft wheel assembly I, a shaft wheel assembly II, a fixing device, and a gear belt; the shaft wheel assembly I includes an upper gear disc, an upper fixture connecting device, a support I, an upper shaft wheel, and a bearing sleeve I; the outer surface of the upper shaft wheel is provided with a groove, the upper gear disc and the upper shaft wheel are respectively fixed to both ends of the bearing sleeve I, the bearing sleeve I is horizontally placed on the support I, and the two are connected in a rotatable manner; the upper fixture connecting device is used to fix the shaft wheel assembly I below the fixed crossbeam of the tensile testing machine; the shaft wheel assembly II includes an upper fixing rod of the gear belt, a lower fixing rod of the gear belt, a spring, a bearing sleeve II, a lower shaft wheel, a lower fixture connecting device, and a support II; the outer surface of the lower shaft wheel is provided with a groove, and it is connected to the support II in a rotatable manner through the bearing sleeve II; the upper fixing rod of the gear belt and the gear belt... The lower fixing rod is fixed to the support II, and the top of the spring is connected to the lower fixing rod of the gear belt; the lower tooling connecting device is used to fix the shaft wheel assembly II above the moving crossbeam of the tensile testing machine; the fixing device includes a bearing sleeve III, a support, a connecting device and a lower gear disc, the lower gear disc is connected to the support in a rotatable manner via the bearing sleeve III, and the connecting device is used to fix the fixing device to the base of the tensile testing machine; when installed on the tensile testing machine, the upper gear disc, the lower gear disc, the upper fixing rod of the gear belt and the lower fixing rod of the gear belt are located on the same side, the upper shaft wheel and the lower shaft wheel are located on the same side, the upper gear disc, the lower gear disc and the spring are located in the same vertical plane, and the grooves of the upper shaft wheel and the lower shaft wheel are located in the same vertical plane; after the gear belt is fitted with the upper gear disc and the lower gear disc, its upper end is fixed to the upper fixing rod of the gear belt and its lower end is fixed to the lower end of the spring.

[0006] Preferably, the support I is an "F"-shaped structure consisting of a horizontal plate and two vertical plates, with coaxial horizontal through holes at the lower ends of the two vertical plates; the bearing sleeve I is placed in the horizontal through holes of the two vertical plates in a clearance fit manner.

[0007] More preferably, the upper tooling connecting device is an upper tooling connecting pin, which has a cylindrical structure, a through hole radially opened at the upper end, and is fixed to the upper surface of the support I horizontal plate at the lower end.

[0008] Preferably, the support II is an "F"-shaped structure consisting of a horizontal plate and two vertical plates. One vertical plate has two grooves in which the upper fixing rod and the lower fixing rod of the gear belt are respectively placed. The other vertical plate has a through hole in which one end of the bearing sleeve II is fixed to the lower axle wheel, and the other end is placed in the through hole with clearance fit.

[0009] More preferably, the lower tooling connecting device is an upper tooling connecting pin, with a cylindrical structure, a radial through hole at the lower end, and the upper end fixed to the lower surface of the support II horizontal plate.

[0010] Preferably, the support is an "L"-shaped plate structure with a through hole in the vertical plate; one end of the bearing sleeve III is fixed to the lower gear disk, and the other end is placed in the through hole of the vertical plate with clearance fit; the horizontal plate is connected to the connecting device.

[0011] More preferably, the connecting device is a fixed magnetic disk with a magnetic disk switch at its front end.

[0012] More preferably, the horizontal plate of the support is provided with a through hole; the horizontal plate is placed above the fixed magnetic disk, and the horizontal plate of the support and the fixed magnetic disk are fixedly connected by means of the through hole and fixing screws.

[0013] This utility model relates to a tensile performance testing fixture for annular seal rings used in a tensile testing machine. When performing a tensile test on the annular seal ring, the tensile testing machine controls the moving crossbeam to move up and down, and the gear belt drives the upper and lower gear discs to rotate, thereby driving the upper and lower shaft wheels to rotate. The rotation of the upper and lower shaft wheels drives the annular seal ring to rotate, realizing that the seal ring contacts the upper and lower shaft wheels at different positions, thereby avoiding stress concentration and improving the reliability of the test. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0015] Figure 1 This is a schematic diagram of the tensile testing machine.

[0016] Figure 2 A schematic diagram of the tensile performance testing fixture for the annular sealing ring of this utility model, installed on a tensile testing machine;

[0017] Figure 3 This is a schematic diagram of the shaft and wheel assembly I.

[0018] Figure 4 This is a schematic diagram of the shaft and wheel assembly II.

[0019] Figure 5 This is a schematic diagram of the fixing device structure;

[0020] Figure 6 This is the left view of the test fixture.

[0021] The components are as follows: 1-Fixed crossbeam, 2-Moving crossbeam, 3-Testing machine base, 4-Displacement measuring device, 5-Fixed crossbeam clamp connection hole, 6-Moving crossbeam clamp connection hole, 7-Force sensor, 8-Upper gear disc, 9-Upper tooling connecting pin, 10-F-type support, 11-Upper shaft wheel; 12-Bearing sleeve I, 13-Gear belt upper fixing rod, 14-Gear belt lower fixing rod, 15-Spring, 16-Bearing sleeve II, 17-Lower shaft wheel; 18-Lower tooling connecting pin; 19-F-type support, 20-Bearing sleeve III, 21-Fixing screw, 22-L-type support, 23-Magnetic disk switch, 24-Fixed magnetic disk, 25-Lower gear disc, 26-Gear belt, 27-Annular sealing ring. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments and accompanying drawings, but these descriptions are not intended to limit the technical solutions of the present invention.

[0023] Example

[0024] This utility model relates to a fixture for testing the tensile properties of annular seals in a tensile testing machine, comprising a shaft wheel assembly I, a shaft wheel assembly II, a fixing device, and a gear belt 26. Figure 2 As shown.

[0025] The shaft and wheel assembly I includes an upper gear disk 8, an upper tooling connecting pin 9, a support I 10, an upper shaft wheel 11, and a bearing sleeve I 12, as follows. Figure 3 As shown. The upper tooling connecting pin 9 is a cylindrical structure with a radial through hole at the upper end. The support I 10 is an "F"-shaped structure consisting of a horizontal plate and two vertical plates. The two vertical plates are located to the lower left of the horizontal plate, and coaxial horizontal through holes are opened at the lower ends of the two vertical plates. The upper shaft wheel 11 has a through hole in the center of the axis and a groove around its outer surface for placing the sealing ring. The bearing sleeve I 12 passes through the two horizontal through holes of the support I 10 with a clearance fit, and the upper gear disk 8 and the upper shaft wheel 11 are fixed at both ends respectively. The upper tooling connecting pin 9 is fixed to the upper surface of the horizontal plate of the support I 10. When the upper gear disk 8 rotates, it can drive the upper shaft wheel 11 to rotate, thereby driving the sealing ring in the groove to rotate circumferentially.

[0026] The shaft and wheel assembly II includes an upper fixed rod 13 for the gear belt, a lower fixed rod 14 for the gear belt, a spring 15, a bearing sleeve II 16, a lower shaft wheel 17, a lower tooling connecting pin 18, and a support II 19, as shown. Figure 4As shown. The lower tooling connecting pin 18 is a cylindrical structure with a radial through hole at its lower end. The support II 19 is an "F"-shaped structure consisting of a horizontal plate and two vertical plates. The two vertical plates are located on the upper left of the horizontal plate. Two grooves are provided above the left vertical plate, and a through hole is provided above the right vertical plate. The lower axle wheel 17 has a through hole in the center of the axis and a groove around its outer surface for placing a sealing ring. The gear belt upper fixing rod 13 and gear belt lower fixing rod 14 are respectively located in the grooves above the left side plate of the support II 19; the left end of the bearing sleeve II 16 is placed in the through hole above the right side plate of the support II 19 with a clearance fit, and the lower axle wheel 17 is fixedly mounted on the right end. The lower tooling connecting pin 18 is fixed to the lower surface of the horizontal plate of the support II 19. The top end of the spring 15 is connected to the gear belt lower fixing rod 14.

[0027] The fixing device includes bearing sleeve Ⅲ20, fixing screw 21, support 22, magnetic disk switch 23, fixing magnetic disk 24, and lower gear disk 25, such as Figure 5 As shown. The support 22 has an "L"-shaped plate structure, with through holes at the top of the vertical plate and the center of the horizontal plate for connecting and fixing the magnetic disk 24 and the lower gear disk 25. The fixed magnetic disk 24 is fixedly connected to the through hole of the horizontal plate of the support 22 by screws 21; the left end of the bearing sleeve III 20 is fixedly connected to the lower gear disk 25, and the right end is placed in the through hole of the vertical plate of the support 22 with a clearance fit. The magnetic disk switch 23 is fixed to the right wall of the fixed magnetic disk 24.

[0028] This utility model relates to a fixture for testing the tensile properties of annular sealing rings in a tensile testing machine. The upper fixture connecting pin 9 is fixedly connected to the fixed crossbeam clamp connecting hole 5 via an upper opening. The shaft wheel assembly I is installed below the fixed crossbeam 1 of the tensile testing machine. The lower fixture connecting pin 18 is fixedly connected to the movable crossbeam clamp connecting hole 6 via a lower opening. The shaft wheel assembly II is installed above the movable crossbeam 2 of the testing machine. The axes of the upper opening of the upper fixture connecting pin 9, the lower opening of the lower fixture connecting pin 18, the fixed crossbeam clamp connecting hole 5, and the movable crossbeam clamp connecting hole 6 are located on the same vertical line. This ensures that the surface grooves of the upper shaft wheel 11 and the lower shaft wheel 17 are located in the same vertical plane, ultimately ensuring that the force measured by the force sensor 7 during the test is the tensile force experienced by the sample. After being assembled with the upper gear disk 8 and the lower gear disk 25, the upper end of the gear belt 26 is fixed to the gear belt fixing rod 13, and the lower end is fixed to the lower end of the spring 15. Figure 6 As shown. The fixing device is mounted on the base 3 of the tensile testing machine via the fixing disk 24. Figure 2 As shown.

[0029] According to GB / T5720-2008 standard, the steps for characterizing the tensile properties of the annular seal using the test fixture of this embodiment are as follows:

[0030] Measure the inner diameter and cross-sectional diameter of the sealing ring, and calculate the cross-sectional area of ​​the sealing ring.

[0031] Without tensile stress, the sealing ring is fitted into the grooves of the upper shaft wheel 11 and the lower shaft wheel 17; the tensile testing system is turned on, and the force value and displacement zero point are adjusted to determine the center distance S0 of the two shaft wheels when the elongation of the inner circumference of the sealing ring is zero.

[0032] The tensile testing machine is turned on for testing. The moving crossbeam 2 is lowered. When the sealing ring is stretched, the upper fixed rod 13 and lower fixed rod 14 of the gear belt drive the gear belt 26 to rotate. The rotating gear belt 26 drives the upper gear disc 8 and lower gear disc 25 to rotate. The rotation of the gear discs drives the upper axle wheel 11 and lower axle wheel 17 to rotate. The rotation of the axle wheels ultimately drives the sealing ring to rotate, thus achieving continuous rotation of the contact position between the sealing ring and the upper axle wheel 11 and lower axle wheel 17, thereby avoiding stress concentration and increasing the reliability of the test results. Record the load when the specimen is stretched to the specified elongation, the load at break, and the elongation.

[0033] This utility model tooling avoids the problem of stress concentration that easily occurs during traditional rubber ring testing, and can truly reflect the tensile properties of rubber sealing rings.

Claims

1. A ring seal tensile property test tooling for a ring seal tensile tester, characterized by: The application relates to a device for testing the tensile strength of a bolt, which comprises an upper shaft wheel assembly I, an upper shaft wheel assembly II, a fixing device and a gear belt (26); the upper shaft wheel assembly I comprises an upper gear disc (8), an upper tool connecting device, a support I (10), an upper shaft wheel (11) and a bearing sleeve I (12); the outer surface of the upper shaft wheel (11) is provided with a groove; the upper gear disc (8) and the upper shaft wheel (11) are fixed at the two ends of the bearing sleeve I (12) respectively; the bearing sleeve I (12) is horizontally placed on the support I (10) and is connected with the support I (10) in a rotatable mode; the upper tool connecting device is used for fixing the upper shaft wheel assembly I below a fixed beam (1) of a tensile testing machine; the upper shaft wheel assembly II comprises a gear belt upper fixing rod (13), a gear belt lower fixing rod (14), a spring (15), a bearing sleeve II (16), a lower shaft wheel (17), a lower tool connecting device and a support II (19); the outer surface of the lower shaft wheel (17) is provided with a groove; the lower shaft wheel (17) is connected with the support II (19) in a rotatable mode through the bearing sleeve II (16); the gear belt upper fixing rod (13) and the gear belt lower fixing rod (14) are fixed on the support II (19); the top end of the spring (15) is connected with the gear belt lower fixing rod (14); the lower tool connecting device is used for fixing the upper shaft wheel assembly II above a movable beam (2) of the tensile testing machine; the fixing device comprises a bearing sleeve III (20), a support (22), a connecting device and a lower gear disc (25); the lower gear disc (25) is connected with the support (22) in a rotatable mode through the bearing sleeve III (20); the connecting device is used for fixing the fixing device on a base (3) of the tensile testing machine; when the device is installed on the tensile testing machine, the upper gear disc (8), the lower gear disc (25), the gear belt upper fixing rod (13) and the gear belt lower fixing rod (14) are located on the same side; the upper shaft wheel (11) and the lower shaft wheel (17) are located on the same side; the upper gear disc (8), the lower gear disc (25) and the spring (15) are located in the same vertical plane; the grooves of the upper shaft wheel (11) and the lower shaft wheel (17) are located in the same vertical plane; the gear belt (26) is sleeved with the upper gear disc (8) and the lower gear disc (25); the upper end of the gear belt (26) is fixed on the gear belt upper fixing rod (13); and the lower end of the gear belt (26) is fixed on the lower end of the spring (15).

2. The ring seal tensile property test tooling for a ring seal tensile tester of claim 1, wherein: The support I (10) is an "F" shaped structure which is composed of a horizontal plate and two vertical plates; coaxial horizontal through holes are formed in the lower ends of the two vertical plates; and the bearing sleeve I (12) is placed in the horizontal through holes of the two vertical plates in a clearance fit mode.

3. The ring seal tensile property test tooling for a ring seal tensile tester of claim 2, wherein: The upper tool connecting device is an upper tool connecting pin (9) which is in a cylindrical structure; a through hole is formed in the upper end of the upper tool connecting pin (9) in a radial direction; and the lower end of the upper tool connecting pin (9) is fixed on the upper surface of the horizontal plate of the support I (10).

4. The ring seal tensile property test tooling for a ring seal tensile tester of claim 1, wherein: The support II (19) is an "F" shaped structure which is composed of a horizontal plate and two vertical plates; one vertical plate is provided with two grooves; the gear belt upper fixing rod (13) and the gear belt lower fixing rod (14) are placed in the two grooves respectively; one vertical plate is provided with a through hole; one end of the bearing sleeve II (16) is fixed with the lower shaft wheel (17); and the other end of the bearing sleeve II (16) is placed in the through hole in a clearance fit mode.

5. The ring seal tensile property test tooling for a ring seal tensile tester of claim 4, wherein: The lower tool connecting device is a lower tool connecting pin (18) with a cylindrical structure, a through hole radially formed in the lower end, and the upper end fixed to the lower surface of the horizontal plate of the support II (19).

6. The ring seal tensile property test tooling for a ring seal tensile tester of claim 1, wherein: The support (22) is an "L" shaped plate structure with a vertical plate having a through hole, a bearing sleeve III (20) having one end fixed to the lower gear plate (25) and the other end placed in the through hole of the vertical plate in a clearance fit manner, and a horizontal plate connected to the connecting device.

7. The ring seal tensile property test tooling for a ring seal tensile tester of claim 1 or 6, wherein: The connecting device is a fixed magnetic disc (24) with a magnetic disc switch (23) arranged at the front end.

8. The ring seal tensile property test tooling for a ring seal tensile tester of claim 7, wherein: The horizontal plate of the support (22) is provided with a through hole, the horizontal plate is placed above the fixed magnetic disc (24), and the fixed connection between the horizontal plate of the support (22) and the fixed magnetic disc (24) is realized by means of the through hole and the fixed screw (21).

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