Bearing sealing structure capable of preventing sealing ring from slipping

Abstract

The utility model discloses a bearing sealing structure capable of preventing a sealing ring from slipping, relates to the technical field of bearing sealing, and provides the following scheme aiming at the problems proposed in the background technology: the bearing sealing structure comprises a pump body, a main shaft is arranged at the output end of the pump body, an impeller is sleeved on the surface of the main shaft, and the left end of the main shaft is in threaded connection with a locking nut; the surface of the main shaft is sleeved with a sealing ring sleeve, an arc-shaped groove is formed in the surface of the sealing ring sleeve, the inner wall of the sealing ring sleeve is fixedly connected with a sealing ring, and the right side of the impeller is fixedly connected with an anti-slip assembly. Through the arrangement of the anti-slip assembly, in the using process, a clamping hook on a mechanical sealing spring can be clamped in a clamping groove, centrifugal force generated when an impeller rotates is used for driving the clamping hook to abut against an extrusion block towards the inner side, and a strip-shaped check block is driven through a rotating plate and a second connecting shaft to block the position above the clamping hook; therefore, the stabilizing effect of the clamping hook in the clamping groove is further improved, the problem of separation is not prone to occurring, and the anti-slip effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bearing seals, in particular to a bearing seal structure for preventing a sealing ring from slipping. Background Art

[0002] A mechanical seal is a device that prevents fluid leakage by having at least one pair of end faces perpendicular to the axis of rotation that remain in contact and slide relative to each other under the action of fluid pressure, the elastic force of a compensation mechanism, and the cooperation of an auxiliary seal. It is more common in various pump bodies, such as centrifugal pumps, centrifuges, reactors, and other equipment.

[0003] Most of the current mechanical seals rotate on the pump shaft through spring interference fit. Once the temperature on the pump shaft is too high or the viscosity of the liquid increases, the mechanical seal will easily slip, which will directly affect the sealing effect. There is room for improvement. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a bearing sealing structure that prevents the sealing ring from slipping.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A bearing sealing structure for preventing a sealing ring from slipping comprises a pump body, a main shaft being mounted on the output end of the pump body, an impeller being sleeved on the surface of the main shaft, a locking nut being threadedly connected to the left end of the main shaft, a sealing ring sleeve being sleeved on the surface of the main shaft, an arc-shaped groove being formed on the surface of the sealing ring sleeve, a sealing ring being fixedly connected to the inner wall of the sealing ring sleeve, an anti-slip assembly being fixedly connected to the right side of the impeller, the anti-slip assembly comprising a mechanical sealing spring sleeve, two slots being formed on the right side of the mechanical sealing spring sleeve, mechanical sealing springs being clamped to the inner walls of the two slots, and a hook being fixedly connected to the left end of the mechanical sealing spring;

[0007] The inner wall of the card slot is provided with a cavity, and the inner top wall and the inner bottom wall of the cavity are provided with a sliding groove, the inner walls of the two sliding grooves are fixedly connected to the limit rods, the inner walls of the two sliding grooves are slidably connected to the limit blocks, the opposite surfaces of the two limit blocks are respectively fixedly connected to the extrusion block and the strip block, the inner wall of the cavity is fixedly connected to the side baffle, the inner wall of the cavity is fixedly connected to the rotating shaft, the surface of the rotating shaft is rotatably connected to the rotating plate, and the side surfaces of the rotating plate are respectively rotatably connected to the first connecting shaft and the second connecting shaft.

[0008] Preferably, circular holes are opened on the sides of the two limit blocks, and the two limit blocks are slidingly connected to the surfaces of the two limit rods through the circular holes respectively. The extrusion block and the strip block are limited by the limit blocks and the limit rods, and the problem of offset and separation will not occur.

[0009] Preferably, the ends of the first connecting shaft and the second connecting shaft away from the rotating plate are respectively rotatably connected to the sides of the extrusion block and the strip stopper. The rotating plate will rotate when pushed by the extrusion block and the first connecting shaft, and at the same time, the strip stopper will be pushed outward through the second connecting shaft.

[0010] Preferably, a wear-resistant component is fixedly connected to the surface of the mechanical sealing spring, and the wear-resistant component includes a first flange. A circular ring is overlapped at the right end of the mechanical sealing spring, and a second flange is fixedly connected to the surface of the circular ring.

[0011] Preferably, the sides of the first flange and the second flange are each provided with four threaded holes, the inner walls of the threaded holes are threadedly connected with positioning bolts, and the first flange and the second flange can be removed by the positioning bolts, so that the circular ring can be replaced.

[0012] Preferably, a hemisphere is fixedly connected to the inner wall of the circular ring, and the hemisphere is adapted to the arc groove. The inner wall of the mechanical sealing spring and the surface of the sealing ring sleeve are separated by the hemisphere, thereby reducing wear and improving durability.

[0013] The beneficial effects of the utility model are:

[0014] 1. By setting up the anti-slip component, when in use, the hook on the mechanical seal spring can be used to get stuck in the slot, and the centrifugal force generated by the rotation of the impeller can be used to drive the hook inward to press against the extrusion block. The rotating plate and the second connecting shaft drive the bar block to block the upper position of the hook, thereby further improving the stability of the hook in the slot and preventing it from easily falling out, thereby improving the anti-slip effect;

[0015] 2. By setting the circular ring and the hemisphere, the inner wall of the mechanical seal spring and the surface of the sealing sleeve can be separated, thereby reducing large-area wear and improving the durability of the sealing ring sleeve and the sealing ring. At the same time, when the hemisphere is severely worn, it is also convenient to replace the circular ring, which is more flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the front cross-section structure of a bearing sealing structure for preventing the sealing ring from slipping proposed by the present invention;

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of a mechanical seal spring sleeve of a bearing seal structure that prevents the seal ring from slipping proposed by the present invention;

[0018] Figure 3 This is a schematic diagram of the three-dimensional structure of a mechanical seal spring of a bearing seal structure that prevents the seal ring from slipping proposed by the present invention;

[0019] Figure 4This is a schematic cross-sectional view of a mechanical seal spring sleeve of a bearing seal structure for preventing a seal ring from slipping proposed by the present invention;

[0020] Figure 5 The utility model proposes a bearing sealing structure for preventing the sealing ring from slipping. Figure 1 A magnified schematic diagram of the structure in the middle.

[0021] In the figure: 1. Pump body; 2. Main shaft; 3. Impeller; 4. Locking nut; 5. Sealing ring sleeve; 6. Sealing ring; 7. Mechanical seal spring sleeve; 8. Slot; 9. Mechanical seal spring; 10. Hook; 11. Limit rod; 12. Limit block; 13. Extrusion block; 14. Strip block; 15. Side baffle; 16. Rotating shaft; 17. Rotating plate; 18. First connecting shaft; 19. Second connecting shaft; 20. First flange; 21. Circular ring; 22. Second flange; 23. Positioning bolt; 24. Hemisphere. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0023] Example 1, with reference to Figure 1 、 Figure 2 、 Figure 3 and Figure 4 , a bearing sealing structure for preventing the sealing ring from slipping, comprising a pump body 1, a main shaft 2 being mounted on the output end of the pump body 1, a surface sleeve of the main shaft 2 being provided with an impeller 3, a locking nut 4 being threadedly connected to the left end of the main shaft, a sealing ring sleeve 5 being provided on the surface of the main shaft 2, an arc-shaped groove being provided on the surface of the sealing ring sleeve 5, a sealing ring 6 being fixedly connected to the inner wall of the sealing ring sleeve 5, an anti-slip component being fixedly connected to the right side of the impeller 3, the anti-slip component comprising a mechanical sealing spring sleeve 7, two card grooves 8 being provided on the right side of the mechanical sealing spring sleeve 7, a mechanical sealing spring 9 being clamped to the inner walls of the two card grooves 8, and a hook 10 being fixedly connected to the left end of the mechanical sealing spring 9;

[0024] The inner wall of the card slot 8 is provided with a cavity, and the inner top wall and the inner bottom wall of the cavity are provided with a slide groove, the inner walls of the two slide grooves are fixedly connected to the limit rod 11, and the inner walls of the two slide grooves are slidably connected to the limit block 12, and the side surfaces of the two limit blocks 12 are provided with a circular hole, and the two limit blocks 12 are respectively slidably connected to the surface of the two limit rods 11 through the circular holes;

[0025] The opposite surfaces of the two limit blocks 12 are respectively fixedly connected with an extrusion block 13 and a strip stopper 14, and the inner wall of the cavity is fixedly connected with a side baffle 15. The inner wall of the cavity is fixedly connected with a rotating shaft 16. The surface of the rotating shaft 16 is rotatably connected to a rotating plate 17. The side surfaces of the rotating plate 17 are respectively rotatably connected with a first connecting shaft 18 and a second connecting shaft 19. The ends of the first connecting shaft 18 and the second connecting shaft 19 away from the rotating plate 17 are respectively rotatably connected to the side surfaces of the extrusion block 13 and the strip stopper 14;

[0026] The hook 10 is affected by the rotation effect of the mechanical seal spring sleeve 7 driven by the impeller 3 in the slot 8, and can squeeze the extrusion block 13, so that the extrusion block 13 moves inward. During the process of the extrusion block 13 moving inward, the rotating plate 17 can be driven to rotate around the rotating shaft 16 through the first connecting shaft 18. At the same time, the strip stopper 14 is pushed outward through the second connecting shaft 19, so that the strip stopper 14 extends and blocks the upper position of the hook 10 in the slot 8, further improving the stability of the hook 10 in the slot 8, and will not easily fall off, with a good anti-slip effect.

[0027] Example 2: Reference Figure 1 and Figure 5 The surface of the mechanical sealing spring 9 is fixedly connected with a wear-resistant component, which includes a first flange 20. A circular ring 21 is overlapped on the right end of the mechanical sealing spring 9. The surface of the circular ring 21 is fixedly connected with a second flange 22. Four threaded holes are opened on the sides of the first flange 20 and the second flange 22. The inner walls of the threaded holes are threadedly connected with positioning bolts 23. The inner wall of the circular ring 21 is fixedly connected with a hemisphere 24, and the hemisphere 24 is adapted to the arc groove.

[0028] By rotating the hemisphere 24 in the arc groove, the inner wall of the mechanical sealing spring 9 can be prevented from directly contacting and rubbing with the surface of the sealing ring sleeve 5, thereby reducing the degree of wear of the sealing ring sleeve 5. At the same time, when the hemisphere 24 is severely worn, it can also be disassembled through the first flange 20, the second flange 22 and the positioning bolts 23, which has high flexibility.

[0029] Working principle: When the pump body 1 is in use, the main shaft 2 can drive the impeller 3 to rotate, and the impeller 3 engages the mechanical seal spring 9 through the mechanical seal spring sleeve 7. The hook 10 of the mechanical seal spring 9 is stuck in the slot 8, and is affected by the rotation of the mechanical seal spring sleeve 7 driven by the rotation of the impeller 3. The hook 10 can press the extrusion block 13 inward, thereby driving the extrusion block 13 to move inward. After the extrusion block 13 moves, it can drive the rotating plate 17 to rotate around the rotating shaft 16 through the first connecting shaft 18, thereby pushing the strip stopper 14 out from above the hook 10 through the second connecting shaft 19, blocking the position above the hook 10, thereby It can improve the limiting effect of the hook 10 in the slot 8 and will not easily cause the problem of detachment, thereby improving the anti-slip performance of the sealing ring, and the mechanical sealing spring 9 is fixedly connected to the circular ring 21 through the first flange 20 and the second flange 22, and the hemisphere 24 on the inner wall of the circular ring 21 can rotate in the arc groove, thereby avoiding direct contact and friction between the inner wall of the mechanical sealing spring 9 and the surface of the sealing ring sleeve 5, greatly reducing the wear of the sealing ring sleeve 5, and extending the service life of the sealing ring sleeve 5 and the sealing ring 6, and when the hemisphere 24 is seriously damaged, it is also convenient to replace the circular ring 21 and the hemisphere 24, and the flexibility is high.

[0030] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A bearing sealing structure for preventing a sealing ring from slipping, comprising a pump body (1), a main shaft (2) being mounted on the output end of the pump body (1), an impeller (3) being sleeved on the surface of the main shaft (2), a locking nut (4) being threadedly connected to the left end of the main shaft, a sealing ring sleeve (5) being sleeved on the surface of the main shaft (2), an arc-shaped groove being formed on the surface of the sealing ring sleeve (5), a sealing ring (6) being fixedly connected to the inner wall of the sealing ring sleeve (5), and an anti-slip component being fixedly connected to the right side of the impeller (3), characterized in that: The anti-slip assembly comprises a mechanical sealing spring sleeve (7), two slots (8) are provided on the right side of the mechanical sealing spring sleeve (7), the inner walls of the two slots (8) are clamped with mechanical sealing springs (9), and the left end of the mechanical sealing spring (9) is fixedly connected with a hook (10); The inner wall of the slot (8) is provided with a cavity, the inner top wall and the inner bottom wall of the cavity are both provided with a slide groove, the inner walls of the two slide grooves are both fixedly connected to a limit rod (11), the inner walls of the two slide grooves are both slidably connected to a limit block (12), the opposite surfaces of the two limit blocks (12) are respectively fixedly connected to an extrusion block (13) and a strip-shaped stop block (14), the inner wall of the cavity is fixedly connected to a side baffle (15), the inner wall of the cavity is fixedly connected to a rotating shaft (16), the surface of the rotating shaft (16) is rotatably connected to a rotating plate (17), and the side surfaces of the rotating plate (17) are respectively rotatably connected to a first connecting shaft (18) and a second connecting shaft (19).

2. A bearing sealing structure for preventing sealing ring from slipping according to claim 1, characterized in that: Circular holes are provided on the sides of the two limiting blocks (12), and the two limiting blocks (12) are slidably connected to the surfaces of the two limiting rods (11) through the circular holes.

3. The anti-slip bearing sealing structure of the sealing ring according to claim 1, characterized in that: One end of the first connecting shaft (18) and the second connecting shaft (19) away from the rotating plate (17) is rotatably connected to the side surfaces of the extrusion block (13) and the strip-shaped stopper (14), respectively.

4. The anti-slip bearing sealing structure of claim 1, wherein: The surface of the mechanical sealing spring (9) is fixedly connected to a wear-resistant component, and the wear-resistant component includes a first flange (20). The right end of the mechanical sealing spring (9) is overlapped with a circular ring (21), and the surface of the circular ring (21) is fixedly connected to a second flange (22).

5. A bearing sealing structure for preventing sealing ring from slipping according to claim 4, characterized in that: Four threaded holes are provided on the side surfaces of the first flange (20) and the second flange (22), and positioning bolts (23) are threadedly connected to the inner walls of the threaded holes.

6. A bearing sealing structure for preventing sealing ring from slipping according to claim 4, characterized in that: A hemispherical body (24) is fixedly connected to the inner wall of the circular ring (21), and the hemispherical body (24) is adapted to the arc-shaped groove.

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