Airbag sealing unit and method of using same

Abstract

The invention relates to the technical field of ship sealing, in particular to an air bag sealing unit and a using method thereof.The air bag sealing unit comprises a flange ring, a cover ring, an embedded ring, a rubber sealing ring, a screw plug and an inflation pipeline; one end of the cover ring is connected with the small end face of the flange ring; the other end of the cover ring is connected with the bearing assembly; the large end face of the flange ring is connected with an end cover of the bearing seat; a sealing groove is formed in the inner surface of the flange ring; the embedded ring is arranged in the rubber sealing ring; a gap is formed between the embedded ring and the rubber sealing ring; the rubber sealing ring is embedded in the sealing groove; one end of the inflating pipeline is arranged on the outer surface of the flange ring; the other end of the inflation pipeline is connected with the embedded ring; and the screw plug is used for sealing the inflating pipeline. The sealing device is simple and convenient to operate, not only meets the sealing requirement of the bearing unit of the large ship, but also meets the technical performance that the bearing unit is compact and flexible in structure, excellent in maintainability, clean, environmentally friendly and the like.

Description

Technical Field

[0001] The present invention relates to the technical field of ship sealing, and in particular to an airbag sealing unit and a use method thereof. Background Art

[0002] With regard to the maintenance and overhaul of bearing units of large ships, the current existing technology involves lifting the ship, disassembling and maintaining the bearing units, which is time-consuming and labor-intensive. Such a solution greatly wastes maintenance costs, is complicated to operate, and has the risk of the bearing units falling into seawater, thereby damaging the performance of the bearing units. However, according to operating conditions and maintenance needs, the existing structure cannot meet the requirements for sealing large ship bearing units.

[0003] In a word, the reliability of bearing units is crucial to ship safety. From the perspective of ship operation and maintenance, bearing units are also required to have compact and flexible structure, good maintainability, clean and environmentally friendly technical performance. Summary of the invention

[0004] The technical problem to be solved by the present invention is to overcome the above-mentioned defects of the prior art and to provide an airbag sealing unit and a method of using the same, which are simple and convenient to operate, and which not only meet the requirements for sealing of large ship bearing units, but also meet the technical performance of the bearing units having compact and flexible structure, excellent maintainability, cleanliness and environmental protection.

[0005] In order to achieve the above-mentioned purpose, an embodiment of the present invention provides the following technical solutions: an airbag sealing unit, comprising a flange ring, a cover ring, an embedded ring, a rubber sealing ring, a screw plug and an inflation pipe; one end of the cover ring is connected to the small end face of the flange ring; the other end of the cover ring is connected to the bearing assembly; the large end face of the flange ring is connected to the end cover of the bearing seat; a sealing groove is arranged on the inner surface of the flange ring; the embedded ring is placed in the rubber sealing ring; a gap is arranged between the embedded ring and the rubber sealing ring; the rubber sealing ring is embedded in the sealing groove; one end of the inflation pipe is arranged on the outer surface of the flange ring; the other end of the inflation pipe is connected to the embedded ring; the screw plug is used to seal the inflation pipe.

[0006] Furthermore, the inflation pipe consists of a vertical pipe section 1, a horizontal pipe section 1, a horizontal pipe section 2 and a vertical pipe section 2; one end of the horizontal pipe section 1 is arranged on the large end face of the flange ring; the other end of the horizontal pipe section 1 is arranged on the vertical pipe section 1; one end of the vertical pipe section 1 is arranged on the outer circumferential face of the flange ring; the other end of the vertical pipe section 1 is arranged on the horizontal pipe section 2; one end of the horizontal pipe section 2 is arranged on the small end face on one side of the flange ring; the other end of the horizontal pipe section 2 is arranged on one end of the vertical pipe section 2; the other end of the vertical pipe section 2 is connected to the embedded ring.

[0007] Furthermore, it also includes an O-ring and a hexagon socket screw, an O-ring is arranged between the flange ring and the cover ring; a threaded blind hole is arranged on the other side of the small end face of the flange ring; the cover ring is arranged with a threaded through hole; the hexagon socket screw passes through the threaded through hole and cooperates with the threaded blind hole; the nail head of the hexagon socket screw is immersed in the threaded through hole.

[0008] Furthermore, it also includes O-ring 2, O-ring 3 and O-ring 4; O-ring 2, O-ring 3 and O-ring 4 are arranged between one side of the large end surface of the flange ring and the end cover of the bearing seat.

[0009] Furthermore, a through hole is provided at a position of the embedding ring corresponding to the second vertical pipe segment.

[0010] Furthermore, sealing teeth are arranged on the inner wall of the rubber sealing ring; the cross section of the sealing teeth is rectangular; there are at least three sealing teeth; and a labyrinth groove is arranged between each of the sealing teeth.

[0011] Furthermore, it also includes a hexagonal bolt and a washer, and the hexagonal bolt passes through the washer to threadably connect the other side of the large end surface of the flange ring with the end cover of the bearing seat.

[0012] Furthermore, it also includes an exhaust pipe, which is arranged at a position where the flange ring is far away from the cover ring; the exhaust pipe opening is sealed by the screw plug.

[0013] Furthermore, the sealing groove is "T"-shaped.

[0014] The method for using the airbag sealing unit comprises the following steps: Step 1: When the bearing needs to be disassembled for inspection, open the screw plug at the exhaust pipe port to discharge the seawater and air on the other side of the bearing assembly; Step 2: According to the working conditions, open the screw plugs of the corresponding inflation pipe section and close the screw plugs of other pipe sections; Step 3: Inflate the pipe section with the screw plug opened, so that the gas enters the gap between the embedded ring and the rubber sealing ring through the through hole of the embedded ring, forming an airbag seal; Step 4: After inflation, the rubber sealing ring is deformed so that its sealing teeth are in close contact with the shaft, thereby isolating and sealing the bearing assembly; Step 5: After the bearing is disassembled and inspected, stop inflating and discharge the gas in the inflation pipe; Step 6: Use screw plugs to plug the pipe section opening of the inflation pipe and the exhaust pipe opening respectively.

[0015] Compared with the prior art, the beneficial effect is that when the bearing unit of a large ship needs to be disassembled for inspection and maintenance, in order to prevent the intrusion of seawater, it is only necessary to remove the screw plug of the air inlet, connect the inflation pipe, and introduce air with a certain pressure. Then, the rubber sealing ring of the airbag sealing unit is deformed under the action of the air pressure, and the inner diameter becomes smaller, contacts with the shaft diameter and forms an interference fit, thereby achieving a sealing effect to prevent the intrusion of seawater. The operation of the present invention is simple and convenient, which not only meets the requirements for the sealing of the bearing unit of a large ship, but also meets the technical performance of the bearing unit with compact and flexible structure, excellent maintainability, clean and environmental protection, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Attached Figure 1 It is a structural schematic diagram of the present invention; Attached Figure 2 It is a structural schematic diagram of the rubber sealing ring of the present invention; Attached Figure 3 It is a schematic structural diagram of the cover ring of the present invention; In the figure: 1. flange ring, 2. cover ring, 3. embedded ring, 4. rubber sealing ring, 5. O-ring one, 6. O-ring two, 7. O-ring three, 8. O-ring four, 9. screw plug, 10. hexagon socket screw, 11. hexagon head bolt, 12. washer, 13. through hole, 14. sealing tooth, 15. labyrinth groove, 16. vertical pipe section one, 17. horizontal pipe section one, 18. horizontal pipe section two, 19. vertical pipe section two, 20. exhaust pipe. DETAILED DESCRIPTION

[0017] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the examples set forth herein; rather, these example embodiments are provided so that the description of the present disclosure will be more comprehensive and complete and the concepts of the example embodiments will be fully conveyed to those skilled in the art. The accompanying drawings are only schematic illustrations of the present disclosure and are not necessarily drawn to scale. The same reference numerals in the figures represent the same or similar parts, and thus their repeated description will be omitted.

[0018] In addition, the described features, structures or characteristics may be combined in one or more example embodiments in any suitable manner. In the following description, many specific details are provided to provide a full understanding of the example embodiments of the present disclosure. However, those skilled in the art will appreciate that the technical solutions of the present disclosure may be practiced while omitting one or more of the specific details, or other methods, components, steps, etc. may be adopted. In other cases, well-known structures, methods, implementations or operations are not shown or described in detail to avoid obscuring various aspects of the present disclosure.

[0019] The present invention provides Figure 1-3The airbag sealing unit shown includes a flange ring 1, a cover ring 2, an embedded ring 3, a rubber sealing ring 4, a screw plug and an inflation pipe; one end of the cover ring 2 is connected to the small end face of the flange ring 1; the other end of the cover ring 2 is connected to the bearing assembly; the large end face of the flange ring 1 is connected to the end cover of the bearing seat; a sealing groove is provided on the inner surface of the flange ring 1; the embedded ring 3 is placed in the rubber sealing ring 4; a gap is provided between the embedded ring 3 and the rubber sealing ring 4; the rubber sealing ring 4 is embedded in the sealing groove; one end of the inflation pipe is provided on the outer surface of the flange ring 1; the other end of the inflation pipe is connected to the embedded ring 3; the screw plug is used to seal the inflation pipe.

[0020] It should be noted that the embedded ring 3 is made of metal (copper in this case) and does not deform. After inflation, the rubber sealing ring 4 deforms toward the axis and contacts the axis, thereby achieving isolation and sealing at the left and right ends.

[0021] Furthermore, the inflation pipe is composed of a vertical pipe section 16, a transverse pipe section 17, a transverse pipe section 2 18 and a vertical pipe section 2 19; one end of the transverse pipe section 17 is arranged on the large end face of the flange ring 1; the other end of the transverse pipe section 17 is arranged on the vertical pipe section 16; one end of the vertical pipe section 16 is arranged on the outer circumferential surface of the flange ring 1; the other end of the vertical pipe section 16 is arranged on the transverse pipe section 2 18; one end of the transverse pipe section 2 18 is arranged on the small end face of one side of the flange ring 1; the other end of the transverse pipe section 2 18 is arranged on one end of the vertical pipe section 2 19; the other end of the vertical pipe section 2 19 is connected to the embedded ring 3.

[0022] Furthermore, it also includes an O-ring 5 and a hexagon socket screw 10, an O-ring 5 is arranged between the flange ring 1 and the cover ring 2; a threaded blind hole is arranged on the other side of the small end face of the flange ring 1; the cover ring 2 is provided with a threaded through hole 13; the hexagon socket screw 10 passes through the threaded through hole 13 and cooperates with the threaded blind hole; the nail head of the hexagon socket screw 10 is immersed in the threaded through hole 13.

[0023] Furthermore, it also includes O-ring 2 6, O-ring 3 7 and O-ring 4 8; O-ring 2 6, O-ring 3 7 and O-ring 4 8 are arranged between one side of the large end surface of the flange ring 1 and the end cover of the bearing seat.

[0024] It should be noted that the application of O-ring 1 5 , O-ring 2 6 , O-ring 3 7 and O-ring 4 8 further ensures the sealing effect and reliability of the entire airbag sealing unit.

[0025] Furthermore, a through hole 13 is provided at a position of the embedding ring 3 corresponding to the second vertical pipe section 19 .

[0026] Furthermore, sealing teeth 14 are arranged on the inner wall of the rubber sealing ring 4 ; the cross section of the sealing teeth 14 is rectangular; there are at least three sealing teeth 14 ; and a labyrinth groove 15 is arranged between each of the sealing teeth 14 .

[0027] It should be noted that the labyrinth groove 15 on the inner diameter of the sealing ring forms a labyrinth seal with the shaft after being inflated.

[0028] Furthermore, it also includes a hexagonal bolt 11 and a washer 12. The hexagonal bolt 11 passes through the washer 12 to threadably connect the other side of the large end surface of the flange ring 1 with the end cover of the bearing seat.

[0029] Furthermore, it also includes an exhaust pipe 20, which is arranged at the flange ring 1 away from the cover ring 2; the exhaust pipe 20 opening is sealed by the screw plug 9.

[0030] It should be noted that there is a gap between the rubber sealing ring 4 and the embedded ring 3. When gas of a certain pressure enters from the inflation pipe, it reaches the gap between the rubber sealing ring 4 and the embedded ring 3 through the through hole 13 on the embedded ring 3. Under the action of the air pressure, the rubber sealing ring 4 is deformed in the axial direction, forming an interference fit with the shaft, thereby achieving sealing.

[0031] Furthermore, the sealing groove is "T"-shaped.

[0032] It should be noted that the sealing unit structure is mainly composed of a flange ring 1, a cover ring 2, an embedded ring 3, a rubber sealing ring 4, an O-ring 1, an O-ring 2, an O-ring 3, an O-ring 4, a screw plug 9, a hexagon socket screw 10, a hexagon head bolt 11, a washer 12 and the like.

[0033] The assembly sequence is: first put the embedded ring 3 into the rubber sealing ring 4, assemble them together and put them into the sealing groove of the inner diameter of the flange ring 1, put the O-ring 1 into the groove on the right side of the flange ring 1, then close the cover ring 2, and fix the position by tightening the hexagon socket screws 10 on the circumference to form an airbag sealing unit. The sealing unit is fixed in position by tightening the hexagonal head bolts 11 and washers 12 on the circumference to the end cover of the bearing seat (O-rings 2, 3 and 4 must be placed in the sealing groove before tightening). To prevent the entry of foreign matter, the exhaust pipe 20 and the inflation pipe need to be blocked with screw plugs 9.

[0034] The method for using the airbag sealing unit comprises the following steps: Step 1: When the bearing seal needs to be disassembled and inspected, open the screw plug 9 at the exhaust pipe 20 to discharge the seawater and air on the other side of the bearing assembly; prevent the seawater and air on the other side of the bearing assembly from entering the bearing assembly along the gap of the sealing structure and causing damage to the bearing assembly; Step 2: According to the working conditions, open the corresponding pipe section plug 9, and close the other pipe section plugs 9; Step 3: Inflate the pipe section of the open screw plug 9 so that the gas enters the gap between the embedded ring 3 and the rubber sealing ring 4 through the through hole 13 of the embedded ring 3 to form an airbag seal; Step 4: After inflation, the rubber seal ring 4 is deformed so that its sealing teeth 14 are in close contact with the shaft, and the two sides of the sealing unit are isolated and sealed; after the exhaust pipe 20 discharges seawater and air, there will be residues left, which will affect the maintenance of the bearing seal if not sealed, so the airbag seal is adopted, and the sealing teeth 14 are used to form a labyrinth seal, which completely isolates the influence of seawater on the bearing assembly and the leakage of the lubricating oil in the bearing cavity; Step 5: After the bearing is disassembled and inspected, stop inflating and discharge the gas in the inflation pipe; Step 6: Use screw plug 9 to plug the pipe section opening of the inflation pipe and the exhaust pipe 20 opening respectively.

[0035] It should be noted that the side close to the cover ring is the ship's bearing cavity, and the side away from the cover ring is the seawater and air cavity. When the bearing unit of a large ship needs to be disassembled for inspection and maintenance, in order to prevent seawater from intruding, a temporary seal is achieved. During normal shipping, the technical solution of the present invention does not interfere with the rotation of the shaft.

[0036] Although the present invention has been described in detail above by general description and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to the present invention. Therefore, these modifications or improvements made without departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. An airbag sealing unit, characterized in that: It includes a flange ring, a cover ring, an embedded ring, a rubber sealing ring, a screw plug and an inflation pipe; one end of the cover ring is connected to the small end face of the flange ring; the other end of the cover ring is connected to the bearing assembly; the large end face of the flange ring is connected to the end cover of the bearing seat; a sealing groove is arranged on the inner surface of the flange ring; the embedded ring is placed in the rubber sealing ring; a gap is arranged between the embedded ring and the rubber sealing ring; the rubber sealing ring is embedded in the sealing groove; one end of the inflation pipe is arranged on the outer surface of the flange ring; the other end of the inflation pipe is connected to the embedded ring; the screw plug is used to seal the inflation pipe.

2. The airbag sealing unit according to claim 1, characterized in that: The inflation pipe consists of a vertical pipe section 1, a horizontal pipe section 1, a horizontal pipe section 2 and a vertical pipe section 2; one end of the horizontal pipe section 1 is arranged on the large end face of the flange ring; the other end of the horizontal pipe section 1 is arranged on the vertical pipe section 1; one end of the vertical pipe section 1 is arranged on the outer circumferential face of the flange ring; the other end of the vertical pipe section 1 is arranged on the horizontal pipe section 2; one end of the horizontal pipe section 2 is arranged on the small end face of one side of the flange ring; the other end of the horizontal pipe section 2 is arranged on one end of the vertical pipe section 2; the other end of the vertical pipe section 2 is connected to the embedded ring.

3. The airbag sealing unit according to claim 1, characterized in that: It also includes an O-ring and a hexagon socket screw, wherein an O-ring is arranged between the flange ring and the cover ring; a threaded blind hole is arranged on the other side of the small end face of the flange ring; a threaded through hole is arranged on the cover ring; the hexagon socket screw passes through the threaded through hole and cooperates with the threaded blind hole; the nail head of the hexagon socket screw is immersed in the threaded through hole.

4. The airbag sealing unit according to claim 1, characterized in that: It also includes O-ring 2, O-ring 3 and O-ring 4; O-ring 2, O-ring 3 and O-ring 4 are arranged between one side of the large end surface of the flange ring and the end cover of the bearing seat.

5. The airbag sealing unit according to claim 2, characterized in that: A through hole is arranged at a position of the embedding ring corresponding to the second vertical pipe section.

6. The airbag sealing unit according to claim 1, characterized in that: Sealing teeth are arranged on the inner wall of the rubber sealing ring; the cross section of the sealing teeth is rectangular; there are at least three sealing teeth; and a labyrinth groove is arranged between each of the sealing teeth.

7. The airbag sealing unit according to claim 1, characterized in that: It also includes a hexagonal bolt and a washer. The hexagonal bolt passes through the washer to thread the other side of the large end surface of the flange ring and the end cover of the bearing seat.

8. The airbag sealing unit according to claim 1, characterized in that: It also includes an exhaust pipe, which is arranged at a position where the flange ring is far away from the cover ring; the exhaust pipe opening is sealed by the screw plug.

9. The airbag sealing unit according to claim 1, characterized in that: The sealing groove is "T" shaped.

10. A method for using the airbag sealing unit according to any one of claims 1 to 9, characterized in that: The following steps are involved: Step 1: When the bearing seal needs to be disassembled and inspected, open the screw plug at the exhaust pipe port to discharge the seawater and air on the other side of the bearing assembly; Step 2: According to the working conditions, open the screw plugs of the corresponding inflation pipe section and close the screw plugs of other pipe sections; Step 3: Inflate the pipe section with the screw plug opened, so that the gas enters the gap between the embedded ring and the rubber sealing ring through the through hole of the embedded ring, forming an airbag seal; Step 4: After inflation, the rubber sealing ring is deformed so that its sealing teeth are in close contact with the shaft, thereby isolating and sealing the sealing unit; Step 5: After the bearing is disassembled and inspected, stop inflating and discharge the gas in the inflation pipe; Step 6: Use screw plugs to plug the pipe section opening of the inflation pipe and the exhaust pipe opening respectively.

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