Auxiliary device for anti-aging test of rubber sealing element

Abstract

The invention relates to an auxiliary device for an anti-aging test of a rubber sealing element, which comprises a rectangular bearing plate, nine groups of lower chucks arranged in an array are formed on the upper end face of the bearing plate, a vertical airtight column is formed in the middle of each lower chuck, and an air inlet hole penetrating through the lower end face of the bearing plate is formed in each airtight column. An air outlet hole communicated with the air inlet hole is formed in the outer wall, close to the lower chuck, of the airtight column; a rectangular box-shaped air inlet groove seat is arranged below the bearing plate, a rectangular annular frame is formed on the outer wall of the upper portion of the air inlet groove seat, a plurality of vertical lower studs are inserted into the frame on the periphery of the air inlet groove seat, the upper ends of the lower studs are fixedly connected to the bearing plate, the lower ends of the lower studs are in threaded connection with adjusting nuts, and the adjusting nuts abut against the lower end face of the frame. The auxiliary device can be used for an aging test in a high-temperature environment and can be used for a sealing test of a test piece after deformation, the test piece does not need to be disassembled and assembled repeatedly, the test is convenient, and meanwhile the test accuracy can be improved.

Description

Technical field:

[0001] The present invention relates to the technical field of rubber seal test devices, and more particularly to an auxiliary device for rubber seal anti-aging test. Background technology:

[0002] A rubber seal is an annular cover, typically composed of one or more parts, fixed to a bearing ring or washer to prevent lubricant leakage and foreign objects from entering. Currently, rubber seals are made from a variety of materials, including fluororubber, silicone rubber, nitrile rubber, EPDM, and neoprene. Each material has different composition ratios, but all rubber seals are susceptible to aging. Developing new rubber seals with new composition ratios typically requires aging testing. This involves clamping the test piece in a fixture to simulate the operating conditions after installation. The seal is then subjected to high-temperature conditions to accelerate aging. Finally, the aging-tested seal is removed from the fixture for airtightness testing. However, after removal, the seal must be re-clamped in the fixture of the airtight equipment. Repeated clamping is cumbersome, and the front and rear clamping, as well as the varying clamping force between different products, can affect test accuracy. Therefore, a fixture suitable for both high-temperature testing and airtightness testing is needed to address the repeated disassembly issue. Summary of the invention:

[0003] The purpose of the present invention is to address the shortcomings of the existing technology and provide an auxiliary device for anti-aging testing of rubber seals. The auxiliary device can be used to test aging tests in high-temperature environments. After deformation, it can be used for sealing tests of test pieces. There is no need to repeatedly disassemble and assemble the test pieces, which makes the test convenient and improves the accuracy of the test.

[0004] An auxiliary device for anti-aging testing of rubber seals, comprising a rectangular carrier plate, with nine groups of lower chucks arranged in an array formed on the upper end surface of the carrier plate, a vertical airtight column formed in the middle of the lower chuck, an air inlet formed in the airtight column and penetrating the lower end surface of the carrier plate, and an air outlet formed on the outer wall of the airtight column near the lower chuck, which is connected to the air inlet.

[0005] A rectangular box-shaped air inlet slot seat is provided below the carrying plate, and a rectangular ring-shaped frame is formed on the outer wall of the upper part of the air inlet slot seat, and a number of vertical lower studs are respectively inserted on the frames around the air inlet slot seat, the upper ends of the lower studs are fixed to the carrying plate, and the lower ends are screwed with adjusting nuts, and the adjusting nuts rest on the lower end surface of the frame; four groups of vertical lower limit columns are inserted in the middle of the carrying plate, and the lower limit columns are distributed between the four adjacent groups of lower chucks, the upper ends of the lower limit columns extend out of the upper end surface of the lower chuck, and the lower ends are inserted and fixed in the air inlet slot seat, and an air inlet connected to the inner cavity of the air inlet slot seat is formed on the frame on one side of the air inlet slot seat;

[0006] The upper part of the airtight column is sleeved with a cylindrical cap. The lower end of the cap is formed with an upper chuck facing the lower chuck. The top of the cap is fixedly connected to a "field" - shaped connecting plate, and two groups of longitudinal locking and pressing components are fixedly connected to the connecting plate.

[0007] The locking and pressing component includes a longitudinal beam plate that abuts against the upper end face of the connecting plate. A number of groups of longitudinal guiding grooves are formed on the longitudinal beam plate. A T - shaped guiding and limiting pin is inserted into the guiding groove. The head of the guiding and limiting pin abuts against the guiding and limiting pin, and the upper and lower ends of the guiding and limiting pin are inserted and fixed on the connecting plate. L - shaped supporting feet are respectively formed at the front and rear ends of the connecting plate. A longitudinal adjusting groove is formed on the horizontal end face of the supporting feet. A vertical upper screw is inserted into the supporting feet. The lower end of the upper screw is fixedly connected to the bearing plate, and the upper end is screwed with a locking nut. The locking nut presses against the supporting feet. Four vertical upper limiting columns are inserted into the space of the connecting plate. The lower ends of the upper limiting columns respectively abut against the upper end faces of the lower limiting columns, and the upper ends are fixedly connected to the longitudinal beam plate.

[0008] Preferably, vertical guiding columns are respectively formed at the four corners of the upper border of the air inlet groove seat, and the upper ends of the guiding columns are respectively inserted into the four corners of the bearing plate.

[0009] Preferably, the lower limiting columns are evenly distributed in a ring around the central axis of the lower chuck on the bearing plate.

[0010] The inner hole of the cap is equal to the diameter of the airtight column. Vertical exhaust grooves are formed on the outer wall of the airtight column. The diameter of the lower chuck is equal to the diameter of the upper chuck, and there is a gap between adjacent lower chucks.

[0011] Preferably, the distance from the upper end of the lower limiting column to the connecting plate is greater than the distance between the bearing plate and the air inlet groove seat.

[0012] Preferably, a rectangular - ring - shaped sealing groove is formed on the upper end face of the air inlet groove seat. A graphite sealing ring is inserted and fixedly connected in the sealing groove, and the upper end of the graphite sealing ring exposes the upper end face of the air inlet groove seat.

[0013] Preferably, the air outlet holes on the airtight column are rectangular and there are at least two. The lower side edges of the air outlet holes are flush with the upper end face of the lower chuck.

[0014] Preferably, the groove width of the guiding groove on the locking and pressing component is equal to the diameter of the lower part of the guiding and limiting pin.

[0015] A longitudinal adjusting bolt is screwed on the side end face of the supporting foot at the front end of the longitudinal beam plate. The end of the adjusting bolt abuts against the front end face of the adjusting bolt. The lower end of the upper limiting column is formed into a hemispherical shape.

[0016] The beneficial effects of the present invention are as follows:

[0017] This auxiliary device can be used to conduct aging tests under high temperature environments, and can be used for sealing tests of test pieces after deformation. There is no need to repeatedly disassemble and assemble the test pieces, which makes the test convenient and improves the accuracy of the test. Description of the drawings:

[0018] Figure 1 It is a three-dimensional position diagram of the present invention;

[0019] Figure 2 It is a structural schematic diagram of the present invention;

[0020] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure at AA in the middle;

[0021] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure at the middle BB

[0022] Figure 5 It is a schematic diagram of the three-dimensional structure of the present invention without the cap and other structures.

[0023] In the figure: 1. Load-bearing plate; 11. Lower chuck; 12. Airtight column; 13. Air inlet; 14. Air outlet; 15. Exhaust groove; 2. Air inlet groove seat; 21. Frame; 22. Air inlet; 23. Guide column; 3. Lower limit column; 4. Lower stud; 5. Adjusting nut; 6. Cap; 61. Upper chuck; 7. Connecting plate; 8. Locking and holding assembly; 81. Longitudinal beam plate; 82. Guide limit pin; 83. Upper stud; 84. Locking nut; 85. Upper limit column; 86. Adjusting bolt; 9. Graphite sealing ring. Specific implementation method:

[0024] Example: See Figures 1 to 5 As shown, an auxiliary device for anti-aging testing of rubber seals includes a rectangular carrier plate 1. Nine groups of lower chucks 11 are formed in an array on the upper end surface of the carrier plate 1. A vertical airtight column 12 is formed in the middle of the lower chuck 11. An air inlet 13 is formed in the airtight column 12 and passes through the lower end surface of the carrier plate 1. An air outlet 14 connected to the air inlet 13 is formed on the outer wall of the airtight column 12 near the lower chuck 11.

[0025] Below the bearing plate 1, there is a rectangular box-shaped air intake groove seat 2. On the outer wall of the upper part of the air intake groove seat 2, there is a rectangular ring-shaped border 21. A number of vertical lower stud bolts 4 are respectively inserted on the border 21 around the air intake groove seat 2. The upper end of the lower stud bolt 4 is fixedly connected to the bearing plate 1, and the lower end is screwed with an adjusting nut 5, and the adjusting nut 5 abuts against the lower end face of the border 21; Four groups of vertical lower limit posts 3 are inserted in the middle of the bearing plate 1. The lower limit posts 3 are distributed between four adjacent lower clamping plates 11. The upper end of the lower limit post 3 extends out of the upper end face of the lower clamping plate 11, and the lower end is inserted and fixed in the air intake groove seat 2. On the border 21 on one side of the air intake groove seat 2, there is an air intake port 22 communicating with the inner cavity of the air intake groove seat 2;

[0026] On the upper part of the airtight column 12, there is a cylindrical cap 6 sleeved. On the lower end of the cap 6, there is an upper clamping plate 61 facing the lower clamping plate 11. The top of the cap 6 is fixedly connected to a "field"-shaped connecting plate 7. On the connecting plate 7, there are two groups of longitudinal locking and pressing components 8;

[0027] The locking and pressing component 8 includes a longitudinal beam plate 81 abutting against the upper end face of the connecting plate 7. On the longitudinal beam plate 81, there are several groups of longitudinal guide grooves 811. In the guide grooves 811, there is a T-shaped guide limit pin 82 inserted. The head of the guide limit pin 82 abuts against the guide limit pin 82, and the upper and lower ends are inserted and fixed on the connecting plate 7; On the front and rear ends of the connecting plate 7, there are respectively L-shaped support feet 812. On the horizontal end face of the support feet 812, there are longitudinal adjustment grooves 813. In the support feet 812, there is a vertical upper stud bolt 83 inserted. The lower end of the upper stud bolt 83 is fixedly connected to the bearing plate 1, and the upper end is screwed with a locking nut 84, and the locking nut 84 presses against the support feet 812; In the space of the connecting plate 7, there are four groups of vertical upper limit posts 85 inserted. The lower ends of the upper limit posts 85 respectively abut against the upper end faces of the lower limit posts 3, and the upper ends are fixedly connected to the longitudinal beam plate 81.

[0028] At the four corners of the upper border 21 of the air intake groove seat 2, there are respectively vertical guide columns 23 formed. The upper ends of the guide columns 23 are respectively inserted into the four corners of the bearing plate 1. The guide columns 23 play a guiding role during the up and down movement of the air intake groove seat 2, and at the same time improve the anti-deformation strength of the upper border 21 of the air intake groove seat 2.

[0029] The lower limit posts 3 are evenly distributed in a ring around the central axis of the lower clamping plate 11 at the center of the bearing plate 1; It is convenient to be paired with the upper limit posts 85;

[0030] The inner hole of the cap 6 is equal to the diameter of the airtight column 12, and a vertical exhaust groove 15 is formed on the outer wall of the airtight column 12. The exhaust groove 15 can discharge the gas inside the cap 6, so that it can be smoothly mounted on the airtight column 12. The diameter of the lower chuck 11 is equal to the diameter of the upper chuck 61. There is a gap between adjacent lower chucks 11, and the gap can pass air flow. The air inlet 13 can also pass air flow. By moving the rubber sealing ring clamped by this device to a high temperature environment, all rubber sealing rings can be heated, so that the environment of each tested rubber sealing ring is consistent.

[0031] The distance from the upper end of the lower limit column 3 to the connecting plate 7 is greater than the distance between the supporting plate 1 and the air inlet groove seat 2. Therefore, after the lower limit column 3 is separated from the upper limit column 85, the air inlet groove seat 2 and the supporting plate 1 can be closed for airtightness testing of the rubber sealing ring.

[0032] A rectangular ring-shaped sealing groove is formed on the upper end surface of the air intake groove seat 2, and a graphite sealing ring 9 is inserted and fixed in the sealing groove. The upper end of the graphite sealing ring 9 is exposed from the upper end surface of the air intake groove seat 2. The graphite sealing ring 9 can improve the sealing effect between the air intake groove seat 2 and the supporting plate 1. At the same time, a graphite ring sleeve can also be installed on the supporting plate 1 and arranged on the lower limit column 4 to improve the sealing. Graphite can withstand high temperatures and the sealing is less affected by high temperatures.

[0033] The air outlet holes 14 on the airtight column 12 are rectangular and are provided with at least two. The lower side of the air outlet holes 14 is flush with the upper end surface of the lower chuck 11. The air outlet holes 14 are used to participate in the sealing test of the rubber sealing ring.

[0034] The width of the guide groove 811 on the locking and pressing assembly 8 is equal to the diameter of the lower portion of the guide limit pin 82;

[0035] A longitudinal adjusting bolt 86 is screwed on the side end face of the support leg 812 at the front end of the longitudinal beam plate 81, and the end of the adjusting bolt 86 rests on the front end face of the adjusting bolt 86; the lower end of the upper limit column 85 is formed into a hemispherical shape, and its adjusting bolt 86 can be used to set the position of the longitudinal beam plate 81 to achieve the alignment between the upper limit column 85 and the lower limit column 4; at the same time, when the lower limit column 4 needs to be separated from the upper limit column 85, the longitudinal beam plate 81 can be moved by rotating the adjusting bolt 86, thereby driving the upper limit column 85 to move, and realizing that the upper limit column 85 is no longer restricted by the upper limit column 85.

[0036] Working principle: This structure is an auxiliary device for the anti-aging test of rubber seals. The auxiliary device is a fixture for clamping the rubber seal ring for testing. Before installing the rubber seal ring, remove the cap 6 by disassembling the locking nut 84, and place the rubber seal ring on the lower chuck 11. At the same time, the rubber seal ring needs to be sleeved on the airtight column 12. The diameter of the rubber seal ring needs to be larger than the diameter of the airtight column 12. Then install the airtight column 12, and tighten the locking nut 84 to achieve the clamping and compression of the rubber seal ring by the lower chuck 11 and the upper chuck 61. At this time, a gap needs to be set between the bearing plate 1 and the air inlet slot seat 2, so that it can be used for aging tests in high temperature environments.

[0037] By rotating the adjusting nut 5, the height of the lower limit column 3 can be changed, and the compression amount of the rubber sealing ring can be adjusted;

[0038] When a sealing test is required, the upper limit post 85 is moved away from the upper limit post 85 by pushing the longitudinal beam plate 81 longitudinally, and then the air intake groove seat 2 and the bearing plate 1 are closed by rotating the adjusting nut 5. The air intake groove seat 2 is connected to the air intake pipe, and the device is placed in water to perform a sealing test of the aging of the rubber sealing ring.

[0039] At the same time, the device is universal and can be used for testing rubber sealing rings of various specifications and sizes.

[0040] The embodiments are intended to illustrate the present invention and are not intended to limit the present invention. Any person skilled in the art may modify the embodiments without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention should be as set forth in the claims of the present invention.

Claims

1. An auxiliary device for anti-aging test of rubber seals, comprising a rectangular carrier plate (1), on the upper end surface of which nine groups of lower chucks (11) arranged in an array are formed, characterized in that: In the middle of the lower chuck (11), a vertical airtight column (12) is formed. An air inlet hole (13) penetrating the lower end face of the bearing plate (1) is formed inside the airtight column (12). An air outlet hole (14) connected to the air inlet hole (13) is formed on the outer wall of the airtight column (12) close to the lower chuck (11). Below the bearing plate (1), a rectangular box-shaped air inlet groove seat (2) is provided. On the outer wall of the upper part of the air inlet groove seat (2), a rectangular ring-shaped frame (21) is formed. A number of vertical lower studs (4) are respectively inserted on the frames (21) around the air inlet groove seat (2). The upper ends of the lower studs (4) are fixedly connected to the bearing plate (1), and the lower ends are screwed with adjusting nuts (5). The adjusting nuts (5) abut against the lower end faces of the frames (21). Four groups of vertical lower limit columns (3) are inserted in the middle of the bearing plate (1). The lower limit columns (3) are distributed between four adjacent groups of lower chucks (11). The upper ends of the lower limit columns (3) extend out of the upper end faces of the lower chucks (11), and the lower ends are inserted and fixed in the air inlet groove seat (2). An air connection port (22) connected to the inner cavity of the air inlet groove seat (2) is formed on the frame (21) on one side of the air inlet groove seat (2). A cylindrical cap (6) is sleeved on the upper part of the airtight column (12). An upper chuck (61) facing the lower chuck (11) is formed at the lower end of the cap (6). The top of the cap (6) is fixedly connected to a "field"-shaped connecting plate (7). Two groups of longitudinal locking and pressing components (8) are fixedly connected to the connecting plate (7). The locking and pressing component (8) includes a longitudinal beam plate (81) abutting against the upper end face of the connecting plate (7). A number of groups of longitudinal guide grooves (811) are formed on the longitudinal beam plate (81). A T-shaped guide limit pin (82) is inserted in the guide grooves (811). The head of the guide limit pin (82) abuts against the guide limit pin (82), and the lower and upper ends are inserted and fixed to the connecting plate (7). L-shaped support feet (812) are respectively formed at the front and rear ends of the connecting plate (7). Longitudinal adjusting grooves (813) are formed on the horizontal end faces of the support feet (812). A vertical upper stud (83) is inserted in the support feet (812). The lower end of the upper stud (83) is fixedly connected to the bearing plate (1), and the upper end is screwed with a locking nut (84). The locking nut (84) presses against the support feet (812). Four groups of vertical upper limit columns (85) are inserted in the spaces of the connecting plate (7). The lower ends of the upper limit columns (85) respectively abut against the upper end faces of the lower limit columns (3), and the upper ends are fixedly connected to the longitudinal beam plate (81).

2. The auxiliary device for anti-aging test of rubber seals according to claim 1, characterized in that: Vertical guide columns (23) are respectively formed at the four corners of the upper frame (21) of the air inlet groove seat (2). The upper ends of the guide columns (23) are respectively inserted at the four corners of the bearing plate (1).

3. The auxiliary device for anti-aging test of rubber seals according to claim 1, characterized in that: The lower limit columns (3) are evenly distributed in a ring around the central axis of the lower chuck (11) at the center of the bearing plate (1). The inner hole of the cap (6) is equal to the diameter of the airtight column (12). A vertical exhaust groove (15) is formed on the outer wall of the airtight column (12). The diameter of the lower chuck (11) is equal to the diameter of the upper chuck (61). A gap is provided between adjacent lower chucks (11).

4. The auxiliary device for anti-aging test of rubber seals according to claim 1, characterized in that: The distance between the upper end of the lower limit column (3) and the connecting plate (7) is greater than the distance between the bearing plate (1) and the air inlet groove seat (2).

5. The auxiliary device for anti-aging test of rubber seals according to claim 4, characterized in that: A rectangular ring-shaped sealing groove is formed on the upper end surface of the air inlet groove seat (2), and a graphite sealing ring (9) is inserted and fixed in the sealing groove, and the upper end of the graphite sealing ring (9) is exposed from the upper end surface of the air inlet groove seat (2).

6. The auxiliary device for anti-aging test of rubber seals according to claim 1, characterized in that: The air outlet holes (14) on the airtight column (12) are rectangular and at least two are provided. The lower side of the air outlet holes (14) is flush with the upper end surface of the lower chuck (11).

7. The auxiliary device for anti-aging test of rubber seals according to claim 1, characterized in that: The width of the guide groove (811) on the locking and pressing assembly (8) is equal to the diameter of the lower portion of the guide limit pin (82); A longitudinal adjusting bolt (86) is screwed onto the side end surface of the supporting foot (812) at the front end of the longitudinal beam plate (81), and the end of the adjusting bolt (86) abuts against the front end surface of the adjusting bolt (86); the lower end of the upper limit column (85) is formed into a hemispherical shape.

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