Anti-vibration mechanical seal

Abstract

The utility model discloses an anti-vibration mechanical sealing element, it includes first seal shell, second seal shell and rotating shaft, the inner surface fixed connection of second seal shell has the sealing ring, the static ring is fixedly connected on the sealing ring, the outer surface fixed connection of rotating shaft has the movable ring, the outer surface fixed connection of movable ring has a plurality of sliding blocks, the inner surface swing joint of sliding block has the guide rod, the both ends fixed connection of guide rod has the limit stop and first threaded rod respectively, the outer surface sliding sleeve of guide rod has the spring. Through the setting of second nut, first nut and limit stop etc. structure, through respectively releasing the fixed between first seal shell, second seal shell and releasing the fixed between first threaded rod and limit plate, can release the restriction to spring, thereby can take down the spring alone from the device and replace, need not change together with other structure, further can reduce the waste to resource.

Description

Technical Field

[0001] This utility model relates to the field of mechanical seals, and in particular to a vibration-resistant mechanical seal. Background Technology

[0002] Mechanical seals are dynamic sealing devices used for rotating shafts. They are mainly used to prevent fluid from leaking from the inside of the equipment and to prevent external impurities from entering the equipment. They are widely used in various fields and are one of the core components of industrial equipment. They are mainly composed of stationary rings, dynamic rings, sealing rings, and springs or other elastic elements.

[0003] In existing technology, the shaft will generate a certain vibration during rotation. When the vibration occurs, the spring will quickly push the moving ring and the stationary ring to fit tightly together through its own elastic stress to ensure the sealing between them. However, after repeated compression and stretching, the spring is prone to metal fatigue, which will affect its own elastic stress and cause insufficient thrust. This will affect the sealing effect between the moving ring and the stationary ring, and thus affect the overall use of the structure. However, the spring and the moving ring are usually designed as a whole, so the moving ring, spring and related accessories can only be removed as a whole, resulting in a waste of resources. Utility Model Content

[0004] The purpose of this invention is to provide a vibration-resistant mechanical seal that allows the spring to be removed from the device for replacement without having to replace other components, thereby reducing resource waste.

[0005] To achieve the above objectives, a vibration-resistant mechanical seal is provided, comprising a first sealing shell, a second sealing shell, and a rotating shaft. A sealing ring is fixedly connected to the inner surface of the second sealing shell, and a stationary ring is fixedly connected to the sealing ring. A movable ring is fixedly connected to the outer surface of the rotating shaft, and multiple sliders are fixedly connected to the outer surface of the movable ring. A guide rod is movably connected to the inner surface of each slider. Limit blocks and a first threaded rod are fixedly connected to both ends of the guide rod, respectively. A spring is slidably sleeved on the outer surface of the guide rod. Multiple limiting rods are rotatably connected to the inner surface of the first sealing shell, and each limiting rod is fixedly connected to... A limiting plate is connected to the first threaded rod. The outer surface of the first threaded rod is threadedly connected to the limiting plate. A first nut is threadedly connected to the outer surface of the first threaded rod. An oil filling pipe is fixedly connected to the second sealing shell. A protective cap is threadedly connected to the outer surface of the oil filling pipe. A limiting ring is fixedly connected to the outer surface of the first sealing shell. Multiple second screws are fixedly connected to the right surface of the limiting ring. A connecting ring is fixedly connected to the outer surface of the second sealing shell. The outer surface of the second screw is movably connected to the connecting ring. A second nut is threadedly connected to the outer surface of the second screw. A sealing ring is fixedly connected to the right surface of the movable ring.

[0006] According to the vibration-resistant mechanical seal, the slider has a positioning groove, and the outer surface of the guide rod is movably connected to the positioning groove.

[0007] According to the vibration-resistant mechanical seal, a connecting groove is provided on the limiting plate, and the outer surface of the first threaded rod is threadedly connected to the connecting groove.

[0008] According to the vibration-resistant mechanical seal, the left surface of the limiting block is in contact with the slider, and the inner surface of the sealing ring is fixedly connected to the rotating shaft.

[0009] According to the vibration-resistant mechanical seal, one end of the spring contacts the left surface of the slider, and the other end of the spring contacts the right surface of the limiting plate.

[0010] According to the vibration-resistant mechanical seal, the right surface of the first nut is in contact with the limiting plate, and the left surface of the second nut is in contact with the connecting ring.

[0011] According to the vibration-resistant mechanical seal, a limiting groove is formed on the first sealing shell, and the outer surface of the limiting rod is rotatably connected to the limiting groove.

[0012] According to the vibration-resistant mechanical seal, the connecting ring has a mating hole, and the outer surface of the second screw is movably connected to the mating hole.

[0013] The above solution has the following advantages: by setting up structures such as the second nut, the first nut and the limiting block, the spring can be released after the fixation between the first sealing shell and the second sealing shell and the fixation between the first threaded rod and the limiting plate are released respectively. This allows the spring to be removed from the device for replacement without having to replace other structures together, thereby reducing the waste of resources.

[0014] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments;

[0016] Figure 1 This is a schematic diagram of the overall structure of an anti-vibration mechanical seal according to the present invention;

[0017] Figure 2 This is a structural schematic diagram of the movable ring section of an anti-vibration mechanical seal according to the present invention;

[0018] Figure 3This is a schematic diagram of the cross-sectional portion of the second sealing shell of an anti-vibration mechanical seal according to the present invention;

[0019] Figure 4 This is a structural schematic diagram of the connecting ring section of an anti-vibration mechanical seal according to this utility model;

[0020] Figure 5 This is a schematic diagram of the limiting plate portion of an anti-vibration mechanical seal according to the present invention;

[0021] Figure 6 This is a structural schematic diagram of the first sealing shell section of an anti-vibration mechanical seal according to the present invention.

[0022] Legend:

[0023] 1. First sealing shell; 2. Second sealing shell; 3. Rotating shaft; 4. Sealing ring; 5. Stationary ring; 6. Moving ring; 7. Slider; 8. Guide rod; 9. Limiting block; 10. Spring; 11. First threaded rod; 12. Limiting plate; 13. First nut; 14. Oil filling pipe; 15. Protective cap; 16. Limiting ring; 17. Second screw; 18. Connecting ring; 19. Second nut; 20. Positioning groove; 21. Connecting groove; 22. Butt hole; 23. Sealing ring; 24. Limiting rod; 25. Limiting groove. Detailed Implementation

[0024] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0025] Reference Figure 1-6This utility model discloses a vibration-resistant mechanical seal, comprising a first sealing shell 1, a second sealing shell 2, and a rotating shaft 3. A sealing ring 4 is fixedly connected to the inner surface of the second sealing shell 2, and a stationary ring 5 is fixedly connected to the sealing ring 4. A movable ring 6 is fixedly connected to the outer surface of the rotating shaft 3, and multiple sliders 7 are fixedly connected to the outer surface of the movable ring 6. A guide rod 8 is movably connected to the inner surface of the slider 7. Limit blocks 9 and a first threaded rod 11 are fixedly connected to both ends of the guide rod 8, respectively. A sliding sleeve is fitted onto the outer surface of the guide rod 8. A spring 10 is rotatably connected to the inner surface of the first sealing shell 1 via multiple limiting rods 24. A limiting plate 12 is fixedly connected to each limiting rod 24. One end of the spring 10 contacts the left surface of the slider 7, and the other end contacts the right surface of the limiting plate 12. The outer surface of the first threaded rod 11 is threadedly connected to the limiting plate 12, and a first nut 13 is threadedly connected to the outer surface of the first threaded rod 11. A filler pipe 14 is fixedly connected to the second sealing shell 2, and a protective cap 15 is threadedly connected to the outer surface of the filler pipe 14. A limiting ring 16 is fixedly connected to the outer surface of a sealing shell 1. Multiple second screws 17 are fixedly connected to the right surface of the limiting ring 16. A connecting ring 18 is fixedly connected to the outer surface of a second sealing shell 2. The outer surface of the second screws 17 is movably connected to the connecting ring 18. A second nut 19 is threaded onto the outer surface of the second screws 17. A sealing ring 23 is fixedly connected to the right surface of a movable ring 6. A positioning groove 20 is provided on a slider 7. The outer surface of a guide rod 8 is movably connected to the positioning groove 20. A connecting groove 2 is provided on a limiting plate 12. 1. The outer surface of the first threaded rod 11 is threadedly connected to the connecting groove 21. The left surface of the limiting block 9 is in contact with the slider 7. The inner surface of the sealing ring 23 is fixedly connected to the rotating shaft 3. The right surface of the first nut 13 is in contact with the limiting plate 12. The left surface of the second nut 19 is in contact with the connecting ring 18. A limiting groove 25 is provided on the first sealing shell 1. The outer surface of the limiting rod 24 is rotatably connected to the limiting groove 25. A mating hole 22 is provided on the connecting ring 18. The outer surface of the second screw 17 is movably connected to the mating hole 22.

[0026] It should be noted that when the rotating shaft 3 rotates, it generates axial stress, which drives the movable ring 6, slider 7, and sealing ring 23 to move. During the movement of slider 7 on guide rod 8, it gradually squeezes spring 10. At this time, spring 10 generates a rebound force, which allows the movable ring 6, slider 7, and sealing ring 23 to quickly reset, achieving a movable seal. By rotating the protective cap 15, the protective cap 15 can be unscrewed from the oil filling pipe 14, and lubricating oil can be added through the oil filling pipe 14. After adding, the protective cap 15 can be screwed back onto the oil filling pipe 14. The limiting plate 12 is rotatably connected to the first sealing shell 1 through the limiting rod 24, the limiting groove 25, and the first sealing shell 1. It is also fixedly connected to the movable ring 6 through the first threaded rod 11, the first nut 13, the guide rod 8, slider 7, and limiting block 9. Therefore, when the rotating shaft 3 rotates, it drives the movable ring 6, the limiting plate 12, and the structures on the movable ring 6 and the limiting plate 12 to rotate together.

[0027] Working principle: By rotating the second nut 19, the second nut 19 is unscrewed from the second screw 17, thus releasing the fixation between the first sealing shell 1 and the second sealing shell 2. At this time, the second sealing shell 2 and the structure on the second sealing shell 2 can be removed from the first sealing shell 1. After the second sealing shell 2 is removed, the protection of the movable ring 6, the limiting plate 12, and other structures can be released. Then, the first nut 13 is unscrewed from the first threaded rod 11, thus releasing the fixation of the first threaded rod 11. Then, by rotating the limiting block 9, the limiting block 9, the guide rod 8, and the first threaded rod 11 can be unscrewed from the movable ring 6 and the limiting plate 12 respectively, thereby releasing the restriction on the spring 10 and realizing the removal of the spring 10. When installing the spring 10, first align the axis of the new spring 10 with the positioning groove 20 and the connecting groove 21, and... Make the two ends of the spring 10 contact the movable ring 6 and the limiting plate 12 respectively. Then, pass the guide rod 8 and the first threaded rod 11 through the positioning groove 20. Since the spring 10 and the positioning groove 20 are on the same axis at this time, the spring 10 and the guide rod 8 can be sleeved at the same time. Then, rotate the limiting block 9 in the opposite direction and screw the first threaded rod 11 into the connecting groove 21 to realize the connection between the limiting plate 12 and the first threaded rod 11. In order to improve the stability of the first threaded rod 11 after connection, screw the first nut 13 back onto the first threaded rod 11 and tighten it. Then, insert the connecting ring 18 into the second screw 17 through the pre-reserved docking hole 22 on the connecting ring 18. Then, screw the second nut 19 back onto the second screw 17 and tighten it. The connection and fixation between the first sealing shell 1 and the second sealing shell 2 can be completed.

[0028] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A vibration-resistant mechanical seal, comprising: The first sealing shell (1), the second sealing shell (2), and the rotating shaft (3) are characterized in that a sealing ring (4) is fixedly connected to the inner surface of the second sealing shell (2), and a stationary ring (5) is fixedly connected to the sealing ring (4); a movable ring (6) is fixedly connected to the outer surface of the rotating shaft (3); a plurality of sliders (7) are fixedly connected to the outer surface of the movable ring (6); a guide rod (8) is movably connected to the inner surface of the slider (7); a limit block (9) and a first threaded rod (11) are fixedly connected to the two ends of the guide rod (8); a spring (10) is slidably sleeved on the outer surface of the guide rod (8); a plurality of limit rods (24) are rotatably connected to the inner surface of the first sealing shell (1); a limit plate (12) is fixedly connected to the limit rod (24); and the first threaded rod (11) is rotatably sleeved on the outer surface of the guide rod (1). The outer surface of the threaded rod (11) is threadedly connected to the limiting plate (12). The outer surface of the first threaded rod (11) is threadedly connected to the first nut (13). The second sealing shell (2) is fixedly connected to the oil filling pipe (14). The outer surface of the oil filling pipe (14) is threadedly connected to the protective cap (15). The outer surface of the first sealing shell (1) is fixedly connected to the limiting ring (16). The right surface of the limiting ring (16) is fixedly connected to multiple second screws (17). The outer surface of the second sealing shell (2) is fixedly connected to the connecting ring (18). The outer surface of the second screw (17) is movably connected to the connecting ring (18). The outer surface of the second screw (17) is threadedly connected to the second nut (19). The right surface of the movable ring (6) is fixedly connected to the sealing ring (23).

2. The vibration-resistant mechanical seal according to claim 1, characterized in that, The slider (7) has a positioning groove (20), and the outer surface of the guide rod (8) is movably connected to the positioning groove (20).

3. The vibration-resistant mechanical seal according to claim 1, characterized in that, The limiting plate (12) has a connecting groove (21), and the outer surface of the first threaded rod (11) is threadedly connected to the connecting groove (21).

4. The vibration-resistant mechanical seal according to claim 1, characterized in that, The left surface of the limiting block (9) is in contact with the slider (7), and the inner surface of the sealing ring (23) is fixedly connected to the rotating shaft (3).

5. The vibration-resistant mechanical seal according to claim 1, characterized in that, One end of the spring (10) is in contact with the left surface of the slider (7), and the other end of the spring (10) is in contact with the right surface of the limiting plate (12).

6. The vibration-resistant mechanical seal according to claim 1, characterized in that, The right surface of the first nut (13) is in contact with the limiting plate (12), and the left surface of the second nut (19) is in contact with the connecting ring (18).

7. The vibration-resistant mechanical seal according to claim 1, characterized in that, A limiting groove (25) is provided on the first sealing shell (1), and the outer surface of the limiting rod (24) is rotatably connected to the limiting groove (25).

8. The vibration-resistant mechanical seal according to claim 1, characterized in that, The connecting ring (18) has a docking hole (22), and the outer surface of the second screw (17) is movably connected to the docking hole (22).

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