Sealing ring simulates actual working conditions high and low temperature compression and torsion durability testing machine and test method

Abstract

The present invention provides a sealing ring simulating actual working conditions under high and low temperature compression and torsion durability testing machine and testing method, which can measure the changes of pressure and torque of the sealing ring after fatigue testing when simulating actual working conditions under high and low temperature environments. It includes a torsional reciprocating loading system, an axial reciprocating loading system, and a sealing ring installation device; the sealing ring installation device includes an installation mold, the installation mold includes an actuator and an inner mold, the actuator is a hollow structure, the inner mold is arranged inside the actuator, and a mud, sand and water mixture is injected between the actuator and the upper surface of the inner mold, the side of the actuator is connected to a mud, sand, water and oil discharge valve, and the tested sealing ring is placed between the inner mold and the actuator; the axial reciprocating loading system can contact the upper end face of the tested sealing ring to reciprocate the axial load on the sealing ring; the torsional reciprocating loading system is connected to the actuator, drives the actuator to rotate, and applies a reciprocating torsional torque to the sealing ring.

Description

Technical Field

[0001] The invention relates to a mechanical seal detection, in particular to a sealing ring simulating actual working conditions high and low temperature compression and torsion durability testing machine and a testing method, belonging to the technical field of testing machines. Background Art

[0002] The seals for construction machinery, especially the track seals, are installed on both sides of the guide pins of the construction machinery tracks. The performance of the seals directly affects the service life of the construction machinery tracks. In actual work, the seals for construction machinery tracks are installed in the bushings. The working environment is extremely harsh, ranging from -40°C to 80°C in extremely cold regions, the North and South Poles and near the equator. Rain, mud, and sand and dust are all media that the seals for construction machinery tracks often come into contact with, and the requirements for the seals are also extremely high. Therefore, the performance of the seals directly affects the service life of the construction machinery.

[0003] According to the requirements of the operating environment characteristics of the sealing ring, we have developed a sealing ring high and low temperature compression and torsion durability testing machine that simulates actual working conditions. Summary of the invention

[0004] The purpose of the present invention is to provide a sealing ring simulating actual working conditions under high and low temperature compression and torsion durability testing machine and testing method, to simulate actual working conditions (medium includes mud, oil, water) to carry out compression and torsion durability fatigue test on the sealing ring under high and low temperature environment, and the application of compression force has no effect on the test of torque sensor, and the application of torsion torque has no effect on the measurement of axial reciprocating compression sensor, and the changes of pressure and torque of the sealing ring after fatigue test when simulating actual working conditions under high and low temperature environment are truly measured.

[0005] In order to achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A sealing ring simulating actual working conditions high and low temperature compression and torsion durability testing machine, comprising a torsion reciprocating loading system, an axial reciprocating loading system, and a sealing ring installation device;

[0007] The sealing ring installation device includes an installation mold, which includes an actuator and an inner mold. The actuator is a hollow structure, and the inner mold is arranged inside the actuator. A sand-water mixture is injected between the actuator and the upper surface of the inner mold. The side of the actuator is connected to a sand-water-oil discharge valve, and the tested sealing ring is placed between the inner mold and the actuator.

[0008] The axial reciprocating loading system can contact the upper end surface of the tested sealing ring and apply axial reciprocating loading to the sealing ring;

[0009] The torsional reciprocating loading system is connected to the actuator cylinder, drives the actuator cylinder to rotate, and applies a reciprocating torsional torque to the sealing ring.

[0010] The sealing ring simulates the actual working conditions of the high and low temperature compression and torsion endurance testing machine. The axial reciprocating loading system includes a guide linear servo actuator, a load sensor, a guide assembly and a pressure rod. One end of the pressure rod is connected to the guide linear servo actuator, and the other end of the pressure rod is connected to the pressure head. The pressure head can contact the upper end surface of the tested sealing ring. The guide assembly includes a guide column, a linear bearing and a guide plate. The guide plate is connected to the load sensor and the load sensor is connected to the guide linear servo actuator. The guide plate performs linear motion through the guide rod and the bearing.

[0011] The sealing ring is a preferred solution for the high and low temperature compression and torsion endurance testing machine simulating actual working conditions, and the pressure rod is a hollow design structure, and the interior of the pressure rod is used to place circulating water.

[0012] The sealing ring is an optimal solution for a high and low temperature compression and torsion endurance testing machine that simulates actual working conditions. The torsional reciprocating loading device includes a servo motor, a reducer, a torque sensor and a torsional reciprocating loading assembly. The servo motor is connected to the reducer, and the output shaft of the reducer is connected to the torque sensor through a coupling. The torque sensor is connected to the sealing ring installation device through the torsional reciprocating loading assembly.

[0013] The sealing ring is an optimal solution for a high and low temperature compression and torsion endurance testing machine that simulates actual working conditions. The torsion reciprocating loading assembly includes a torsion bar, a flat key and a torsion coupling. The coupling is connected to the torsion bar through a flat key, and the torsion bar is connected to the actuator. The lower end of the torsion bar is connected to a planar thrust ball bearing.

[0014] The sealing ring is an optimal solution for simulating actual working conditions of high and low temperature compression and torsion durability testing machine, which also includes a main frame, a workbench, a movable beam and a top plate. The upper end of the main frame is connected to the workbench, the movable beam is above the workbench, the top plate is above the movable beam, the upper top plate and the workbench are connected by a column, the piston rod of the lifting cylinder is connected to the movable beam, the movable beam can be moved up and down by the lifting cylinder, the torsional reciprocating loading system is located below the sealing ring installation device and connected to the workbench, and the axial reciprocating loading system is located above the sealing ring installation device.

[0015] The sealing ring is an optimal solution for the high and low temperature compression and torsion endurance testing machine simulating actual working conditions, which also includes a beam locking system. The beam locking system includes a locking cylinder, which is installed on the rear side of the moving beam, and the locking cylinder is perpendicular to the lifting cylinder.

[0016] The sealing ring simulates the actual working conditions of the high and low temperature compression and torsion durability testing machine. The preferred solution also includes a high and low temperature environment testing chamber system. The high and low temperature environment testing chamber system includes a chamber body. The bottom of the chamber body is connected to a pulley. The pulley is installed on a bracket guide rail. The bracket guide rail is connected to a workbench.

[0017] The sealing ring is an optimal solution for the high and low temperature compression and torsion endurance testing machine simulating actual working conditions, and a gas spring shock absorber is provided at the bottom of the frame.

[0018] A test method using the sealing ring to simulate actual working conditions using a high and low temperature compression and torsion durability tester comprises the following steps:

[0019] S1: The tested sealing ring is placed between the actuator and the inner mold, and mud is injected through the mud hole according to the actual working conditions;

[0020] S2: The actuator is not connected to the torsion bar first, the pressure head contacts the upper end surface of the tested seal ring, and the linear servo actuator is guided to apply an axial reciprocating load. During the test, the sediment, water and oil discharge valve is closed. After the test is completed, the sediment, water and oil discharge valve is opened;

[0021] S3: The torsion bar passes through the workbench and goes deep into the environmental test chamber, and is connected to the actuator. The servo motor drives it to rotate forward and reverse, exerting a reciprocating torsional torque on the sealing ring.

[0022] S4: The load sensor and torque sensor collect axial linear reciprocating load and reciprocating torsional moment respectively, collect force-torque-time curves in real time, and monitor and record various test data, including axial force peak value, valley value, torque peak value, valley value, force and torque at different ambient temperatures, and attenuation of force and torque at different time stages.

[0023] The advantages of the present invention are:

[0024] The actual working conditions (medium includes mud, oil, water) are simulated in high and low temperature environment to conduct compression and torsion fatigue test on the sealing ring. The application of compression force has no effect on the test of torque sensor, and the application of torsion torque has no effect on the measurement of axial reciprocating compression sensor. The changes of pressure and torque of the sealing ring after fatigue test are truly measured when simulating the actual working conditions in high and low temperature environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0026] Figure 1 It is an overall schematic diagram of an embodiment of the present invention.

[0027] Figure 2 Schematic diagram of an axial reciprocating loading system according to an embodiment of the present invention.

[0028] Figure 3 Schematic diagram of a torsional reciprocating loading system according to an embodiment of the present invention.

[0029] Figure 4 Schematic diagram of a sealing ring installation device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] refer to Figure 1 and Figure 4 , a sealing ring simulating actual working conditions high and low temperature compression and torsion durability testing machine, comprising a frame structure, a torsion reciprocating loading system, an axial reciprocating loading system and a sealing ring installation device;

[0032] The frame structure includes a main frame 1, a workbench 7, a moving beam 13 and a top plate 15. The bottom of the main frame 1 is connected to an air spring shock absorber 24 to reduce vibration and adjust the level. The upper end of the main frame 1 is connected to the workbench 7. The moving beam 13 is located above the workbench 7. The top plate 15 is located above the moving beam 13. The upper top plate 15 and the workbench 7 are connected by a column 17. The piston rod of the lifting cylinder 8 is connected to the moving beam 13. The moving beam 13 can move up and down by being driven by the lifting cylinder 8.

[0033] The sealing ring installation device comprises an installation mold, wherein the installation mold comprises an actuator 201, an inner mold 206 and a cover 207. The actuator 201 is a hollow structure having a first receiving groove and a second receiving groove. The first receiving groove is used to place the inner mold 206. The second receiving groove is a conical structure used to inject a mud-water mixture 203 between the actuator 201 and the upper surface of the inner mold 206. The side of the actuator 201 is connected to a mud-water-oil discharge valve 208. The tested sealing ring 202 is placed between the inner mold 206 and the actuator 201.

[0034] An axial reciprocating loading system is located above the sealing ring installation device and is capable of contacting the upper end surface of the tested sealing ring 202 to apply axial reciprocating loading to the sealing ring;

[0035] The torsional reciprocating loading system is located below the sealing ring installation device and is connected to the workbench and the actuator 201, driving the actuator 201 to rotate and applying a reciprocating torsional torque to the sealing ring.

[0036] refer to Figure 2The axial reciprocating loading system includes a guide linear servo actuator 14, a load sensor 19, a guide assembly and a pressure rod 20. One end of the pressure rod 20 is connected to the guide linear servo actuator 14, and the other end of the pressure rod 20 is connected to a pressure head 204. The pressure head 204 is designed as a hollow structure with an oil filling port. The pressure head 204 can contact the upper end surface of the tested sealing ring 202. The guide assembly includes a guide column 10, a linear bearing 11 and a guide plate 12. The guide plate 12 is connected to the load sensor 19 and the load sensor 19 is connected to the guide linear servo actuator 14. The guide plate 12 performs linear motion through the guide rod 10 and the bearing 12. The piston rod of the guide linear servo actuator 14 passes through the moving crossbeam 13 and is connected to the load sensor 19. The pressure rod 20 is connected through the guide assembly. The pressure rod 20 is directly connected to the pressure head 204 to apply an axial reciprocating load to the sealing ring.

[0037] In this embodiment, the pressure rod 20 is a hollow structure, and the inside of the pressure rod 20 is used to place circulating water 25, in order to prevent the temperature change of the environmental test box from changing the output of the load sensor 19, which would affect the accuracy of the test data. Because the pressure rod 20 is made of metal, it has thermal conductivity.

[0038] refer to Figure 3 The torsional reciprocating loading device 6 includes a servo motor 2, a reducer 3, a torque sensor 5 and a torsional reciprocating loading assembly. The servo motor 2 is connected to the reducer 3. The output shaft of the reducer 3 is connected to the torque sensor 5 through a coupling 4. The torque sensor 5 is connected to the sealing ring installation device through the torsional reciprocating loading assembly.

[0039] In this embodiment, the torsion reciprocating loading assembly includes a torsion bar 602, a flat key 603 and a torsion coupling 604. The coupling 604 is connected to the torsion bar 602 via the flat key 603, and the torsion bar 602 is connected to the actuator 201. The lower end of the torsion bar 602 is connected to the planar thrust ball bearing 601.

[0040] In this embodiment, a beam locking system is also included. The beam locking system includes a locking cylinder 18. The locking cylinder 18 is installed on the rear side of the moving beam 13, and the locking cylinder 18 and the lifting cylinder 8 are perpendicular to each other. The lifting cylinder 8 moves the moving beam 13 up and down to complete the space adjustment. After the adjustment is completed, the moving beam is locked. During the test, the moving beam does not produce axial movement.

[0041] In this embodiment, a high and low temperature environment test box system is also included, which includes a box body, a pulley is connected to the bottom of the box body, the pulley is installed on the bracket rail 22, and the bracket rail 22 is connected to the workbench 7. If the high and low temperature test is not required, the box body can be moved to the rear of the test machine host without affecting the test under normal temperature environment.

[0042] 10. A test method using the sealing ring to simulate actual working conditions using a high and low temperature compression and torsion durability tester, characterized in that it comprises the following steps:

[0043] S1: The tested sealing ring (202) is placed between the actuator (201) and the inner mold (206), and mud is injected through the mud hole according to the actual working conditions;

[0044] S2: The actuator (201) is not connected to the torsion bar (602) first, the pressure head (204) contacts the upper end surface of the tested sealing ring (202), and the guide linear servo actuator (14) applies an axial reciprocating load. During the test, the sediment, water and oil discharge valve (208) is closed. After the test is completed, the sediment, water and oil discharge valve (208) is opened;

[0045] S3: The torsion bar passes through the workbench and extends into the environmental test chamber, and is connected to the actuator cylinder (201). The servo motor (2) drives the actuator cylinder to rotate forward and reverse, and applies a reciprocating torsional torque to the sealing ring.

[0046] S4: The load sensor 19 and the torque sensor 5 collect the axial linear reciprocating load and the reciprocating torsional moment respectively, collect the force-torque-time curves in real time, and monitor and record various test data, including the axial force peak value, valley value, torque peak value, valley value, force and torque at different ambient temperatures, and the attenuation of force and torque at different time stages.

[0047] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A sealing ring high and low temperature compression and torsion durability testing machine that simulates actual working conditions, Features: It includes a torsional reciprocating loading system, an axial reciprocating loading system and a sealing ring installation device; The sealing ring installation device comprises an installation mold, wherein the installation mold comprises an actuator (201) and an inner mold (206), the actuator (201) is a hollow structure, the inner mold (206) is arranged inside the actuator (201), a sand-water mixture (203) is injected between the upper surfaces of the actuator (201) and the inner mold (206), a sand-water-oil discharge valve (208) is connected to the side of the actuator (201), and a tested sealing ring (202) is placed between the inner mold (206) and the actuator (201); An axial reciprocating loading system, capable of contacting the upper end surface of the tested sealing ring (202) to apply axial reciprocating loading to the sealing ring; A torsional reciprocating loading system is connected to the actuator (201) and drives the actuator (201) to rotate, thereby applying a reciprocating torsional torque to the sealing ring; The axial reciprocating loading system comprises a guide linear servo actuator (14), a load sensor (19), a guide assembly and a pressure rod (20), wherein one end of the pressure rod (20) is connected to the guide linear servo actuator (14), and the other end of the pressure rod (20) is connected to a pressure head (204), and the pressure head (204) can contact the upper end surface of the tested sealing ring (202); the guide assembly comprises a guide column (10), a linear bearing (11) and a guide plate (12), the guide plate (12) is connected to the load sensor (19) and the load sensor (19) is connected to the guide linear servo actuator (14), and the guide plate (12) performs linear motion through the guide rod (10) and the bearing (12); The torsional reciprocating loading device (6) comprises a servo motor (2), a reducer (3), a torque sensor (5) and a torsional reciprocating loading assembly, wherein the servo motor (2) is connected to the reducer (3), the output shaft of the reducer (3) is connected to the torque sensor (5) via a coupling (4), and the torque sensor (5) is connected to the sealing ring installation device via the torsional reciprocating loading assembly; The torsion reciprocating loading assembly comprises a torsion bar (602), a flat key (603) and a torsion coupling (604); the coupling (604) and the torsion bar (602) are connected via the flat key (603); the torsion bar (602) is connected to the actuator cylinder (201); and the lower end of the torsion bar (602) is connected to the plane thrust ball bearing (601).

2. According to the sealing ring described in claim 1, the high and low temperature compression and torsion durability testing machine simulating actual working conditions, Features: The pressure rod (20) is a hollow structure, and the interior of the pressure rod (20) is used to place circulating water (25).

3. According to the sealing ring described in claim 1, the high and low temperature compression and torsion durability testing machine simulating actual working conditions, Features: It also includes a main frame (1), a workbench (7), a moving beam (13) and a top plate (15), wherein the upper end of the main frame (1) is connected to the workbench (7), the moving beam (13) is located above the workbench (7), the top plate (15) is located above the moving beam (13), the upper top plate (15) and the workbench (7) are connected via a column (17), the piston rod of the lifting cylinder (8) is connected to the moving beam (13), the moving beam (13) can be moved up and down by being driven by the lifting cylinder (8), the torsional reciprocating loading system is located below the sealing ring mounting device and connected to the workbench, and the axial reciprocating loading system is located above the sealing ring mounting device.

4. According to claim 3, the sealing ring simulates the actual working conditions of high and low temperature compression and torsion durability testing machine, Features: It also includes a crossbeam locking system, which includes a locking cylinder (18). The locking cylinder (18) is installed on the rear side of the moving crossbeam (13), and the locking cylinder (18) and the lifting cylinder (8) are perpendicular to each other.

5. According to claim 3, the sealing ring simulates the actual working conditions of high and low temperature compression and torsion durability testing machine, Features: It also includes a high and low temperature environment test box system, which includes a box body, a pulley connected to the bottom of the box body, and the pulley is installed on a bracket guide rail (22), and the bracket guide rail (22) is connected to a workbench (7).

6. According to claim 3, the sealing ring simulates the actual working conditions of high and low temperature compression and torsion durability testing machine, Features: A gas spring shock absorber (24) is provided at the bottom of the frame (1).

7. A test method using a sealing ring according to any one of claims 1 to 6 to simulate actual working conditions using a high and low temperature compression and torsion durability tester, It is characterized in that The following steps are involved: S1: The tested sealing ring (202) is placed between the actuator (201) and the inner mold (206), and mud is injected through the mud hole according to the actual working conditions; S2: The actuator (201) is not connected to the torsion bar (602) first, the pressure head (204) contacts the upper end surface of the tested sealing ring (202), and the guide linear servo actuator (14) applies an axial reciprocating load. During the test, the sediment, water and oil discharge valve (208) is closed. After the test is completed, the sediment, water and oil discharge valve (208) is opened; S3: The torsion bar passes through the workbench and extends into the environmental test chamber, and is connected to the actuator cylinder (201). The servo motor (2) drives the actuator cylinder to rotate forward and reverse, and applies a reciprocating torsional torque to the sealing ring. S4: The load sensor (19) and the torque sensor (5) respectively collect the axial linear reciprocating load and the reciprocating torsional moment, collect the force-torque-time curve in real time, and monitor and record various test data, including the axial force peak value, the trough value, the torque peak value, the trough value, the force and torque at different ambient temperatures, and the attenuation of the force and torque at different time stages.

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