Air bag sealing unit

Abstract

The utility model relates to the technical field of ship sealing, in particular to an air bag sealing unit which 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, environment-friendly and the like.

Description

Technical Field

[0001] This utility model relates to the field of ship sealing technology, and in particular to an airbag sealing unit. Background Technology

[0002] The current technology for maintaining and repairing large ship bearing units involves lifting the ship to disassemble and maintain the bearing units. This is time-consuming and labor-intensive, resulting in significant waste of maintenance costs. The operation is complex and carries the risk of seawater entering the bearing units, which could damage their performance. Furthermore, based on the operating conditions and maintenance needs, the existing structure cannot meet the sealing requirements for large ship bearing units.

[0003] In conclusion, 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 technical performance such as compact and flexible structure, excellent maintainability, and clean and environmentally friendly properties. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the above-mentioned defects in the existing technology and provide an airbag sealing unit that is simple and convenient to operate. It not only meets the sealing requirements of large ship bearing units, but also meets the technical performance requirements of bearing units such as compact and flexible structure, excellent maintainability, and clean and environmentally friendly.

[0005] To achieve the above objectives, this utility model provides the following technical solution: 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 a bearing assembly; the large end face of the flange ring is connected to the end cover of the bearing housing; a sealing groove is provided on the inner surface of the flange ring; the embedded ring is placed inside the rubber sealing ring; a gap is provided 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 disposed 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 is composed of a vertical pipe section one, a horizontal pipe section one, a horizontal pipe section two, and a vertical pipe section two; one end of the horizontal pipe section one is disposed on the large end face of the flange ring; the other end of the horizontal pipe section one is disposed on the vertical pipe section one; one end of the vertical pipe section one is disposed on the outer circumferential surface of the flange ring; the other end of the vertical pipe section one is disposed on the horizontal pipe section two; one end of the horizontal pipe section two is disposed on the small end face of one side of the flange ring; the other end of the horizontal pipe section two is disposed at one end of the vertical pipe section two; the other end of the vertical pipe section two is connected to the embedded ring.

[0007] Furthermore, it also includes an O-ring and a socket head cap screw. An O-ring is provided between the flange ring and the cover ring. A threaded blind hole is provided on the other side of the small end face of the flange ring. A threaded through hole is provided on the cover ring. The socket head cap screw passes through the threaded through hole and mates with the threaded blind hole. The head of the socket head cap screw is inserted into the threaded through hole.

[0008] Furthermore, it also includes O-ring two, O-ring three and O-ring four; O-ring two, O-ring three and O-ring four are provided between one side of the large end face of the flange and the end cover of the bearing housing.

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

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

[0011] Furthermore, it also includes hexagonal head bolts and washers, the hexagonal head bolts passing through the washers to thread the other side of the large end face of the flange ring to the end cap of the bearing housing.

[0012] Furthermore, it also includes an exhaust pipe located away from the flange ring; the exhaust pipe opening is sealed by the screw plug.

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

[0014] A method for using an airbag sealing unit includes the following steps:

[0015] Step 1: When it is necessary to disassemble and inspect the bearing, open the screw plug at the vent pipe to discharge the seawater and air from the other side of the bearing assembly;

[0016] Step 2: Depending on the working conditions, open the plug at the corresponding section of the inflation pipe and close the plugs at the other sections.

[0017] Step 3: Inflate the pipe section with the plug open, allowing the gas to enter the gap between the insert ring and the rubber sealing ring through the through hole of the insert ring, forming an airbag seal;

[0018] Step 4: After inflation, the rubber sealing ring deforms, causing its sealing teeth to make tight contact with the shaft, thus isolating and sealing the bearing assembly;

[0019] Step 5: After the bearing is disassembled and inspected, stop the inflation process and release the gas from the inflation pipe.

[0020] Step 6: Use screw plugs to block the openings of the inflation pipe and the exhaust pipe respectively.

[0021] Compared with existing technologies, the advantages are as follows: When large ship bearing units need to be disassembled for inspection and maintenance, in order to prevent seawater intrusion, simply remove the screw plug of the air inlet, connect the air inlet pipe, and introduce air at a certain pressure. The rubber sealing ring of this airbag sealing unit will deform under the action of air pressure, the inner diameter will become smaller, and it will contact the shaft diameter and form an interference fit, thereby achieving the sealing effect to prevent seawater intrusion. This utility model is simple and convenient to operate, which not only meets the sealing requirements of large ship bearing units, but also meets the technical performance requirements of bearing units with compact and flexible structure, excellent maintainability, and clean and environmentally friendly features. Attached Figure Description

[0022] Appendix Figure 1 It is a structural diagram of the utility model;

[0023] Appendix Figure 2 This is a schematic diagram of the structure of the rubber sealing ring of this utility model;

[0024] Appendix Figure 3 This is a schematic diagram of the cover ring of this utility model;

[0025] In the diagram: 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. Plug, 10. Socket head screw, 11. Hex head bolt, 12. Washer, 13. Through hole, 14. Sealing teeth, 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 Implementation

[0026] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, they are provided so that the description of this disclosure will be more complete and fully convey the concept of the exemplary embodiments to those skilled in the art. The drawings are merely illustrative of this disclosure and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0027] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more exemplary embodiments. Numerous specific details are provided in the following description to give a full understanding of exemplary embodiments of this disclosure. However, those skilled in the art will recognize that the technical solutions of this disclosure can be practiced with one or more of the specific details omitted, or other methods, components, steps, etc., can be employed. In other instances, well-known structures, methods, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this disclosure.

[0028] This utility model provides, for example Figure 1-3 An airbag sealing unit is shown, comprising a flange ring 1, a cover ring 2, an insert 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 a bearing assembly; the large end face of the flange ring 1 is connected to the end cover of the bearing housing; a sealing groove is provided on the inner surface of the flange ring 1; the insert ring 3 is placed inside the rubber sealing ring 4; a gap is provided between the insert 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 disposed on the outer surface of the flange ring 1; the other end of the inflation pipe is connected to the insert ring 3; the screw plug is used to seal the inflation pipe.

[0029] 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 towards the axis and contacts the shaft, thereby achieving isolation and sealing at both ends.

[0030] Furthermore, the inflation pipe is composed of a first vertical pipe section 16, a first horizontal pipe section 17, a second horizontal pipe section 18, and a second vertical pipe section 19; one end of the first horizontal pipe section 17 is disposed on the large end face of the flange ring 1; the other end of the first horizontal pipe section 17 is disposed on the first vertical pipe section 16; one end of the first vertical pipe section 16 is disposed on the outer circumferential surface of the flange ring 1; the other end of the first vertical pipe section 16 is disposed on the second horizontal pipe section 18; one end of the second horizontal pipe section 18 is disposed on the small end face of one side of the flange ring 1; the other end of the second horizontal pipe section 18 is disposed on one end of the second vertical pipe section 19; the other end of the second vertical pipe section 19 is connected to the embedded ring 3.

[0031] Furthermore, it also includes an O-ring 5 and a socket head cap screw 10. An O-ring 5 is provided between the flange ring 1 and the cover ring 2. A threaded blind hole is provided on the other side of the small end face of the flange ring 1. A threaded through hole 13 is provided on the cover ring 2. The socket head cap screw 10 passes through the threaded through hole 13 and engages with the threaded blind hole. The head of the socket head cap screw 10 is inserted into the threaded through hole 13.

[0032] 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 provided between one side of the large end face of the flange ring 1 and the end cover of the bearing seat.

[0033] 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.

[0034] Furthermore, a through hole 13 is provided at the position corresponding to the embedded ring 3 and the vertical pipe segment 19.

[0035] Furthermore, sealing teeth 14 are provided 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 provided between each sealing tooth 14.

[0036] It should be noted that the labyrinth groove 15 in the inner diameter of the sealing ring forms a labyrinth seal with the shaft after inflation.

[0037] Furthermore, it also includes a hexagonal head bolt 11 and a washer 12, the hexagonal head bolt 11 passing through the washer 12 to thread a connection between the other side of the large end face of the flange ring 1 and the end cover of the bearing housing.

[0038] Furthermore, it also includes an exhaust pipe 20, which is located on the flange ring 1 away from the cover ring 2; the outlet of the exhaust pipe 20 is sealed by the screw plug 9.

[0039] 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 through 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 air pressure, the rubber sealing ring 4 deforms in the direction of the shaft center, forming an interference fit with the shaft, thereby achieving a seal.

[0040] Furthermore, the sealing groove is T-shaped.

[0041] It should be noted that the sealing unit structure is mainly composed of flange ring 1, cover ring 2, embedded ring 3, rubber sealing ring 4, O-ring 1, O-ring 2, O-ring 3, O-ring 4, screw plug 9, internal hex screw 10, hex head bolt 11, washer 12, etc.

[0042] The assembly sequence is as follows: First, place the embedded ring 3 into the rubber sealing ring 4, assemble them together, and then place them into the sealing groove of the inner diameter of the flange ring 1. Place 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 hexagonal head 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 housing (O-ring 2, O-ring 3 and O-ring 4 need to be placed into the sealing groove before tightening). To prevent the entry of foreign objects, the exhaust pipe 20 and the inflation pipe need to be plugged with screw plugs 9.

[0043] A method for using an airbag sealing unit includes the following steps:

[0044] Step 1: When it is necessary to disassemble and inspect the bearing seal, open the screw plug 9 of the exhaust pipe 20 to discharge seawater and air from the other side of the bearing assembly; prevent seawater and air from the other side of the bearing assembly from entering the bearing assembly along the gaps in the sealing structure and causing damage to the bearing assembly.

[0045] Step 2: Depending on the working conditions, select and open the corresponding section of the air-filled pipe with the screw plug 9, and close the other sections with the screw plug 9.

[0046] Step 3: Inflate the pipe section with the screw plug 9 open, 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, forming an airbag seal;

[0047] Step 4: After inflation, the rubber sealing ring 4 deforms, so that its sealing teeth 14 are in close contact with the shaft, achieving isolation and sealing on both sides of the sealing unit; after the exhaust pipe 20 discharges seawater and air, there will be residues. If not sealed, it will affect the maintenance of the bearing seal. Therefore, an airbag seal is adopted, and the sealing teeth 14 form a labyrinth seal to completely isolate the influence of seawater on the bearing assembly and prevent the lubricating oil in the bearing cavity from leaking outward.

[0048] Step 5: After the bearing is disassembled and inspected, stop the inflation process and release the gas from the inflation pipe.

[0049] Step 6: Use plug 9 to plug the inlet of the inflation pipe and the outlet of the exhaust pipe 20 respectively.

[0050] It should be noted that the side closer to the cover ring is the bearing cavity of the ship; the side farther away from the cover ring is the seawater and air cavity.

[0051] Although the present invention has been described in detail above with general descriptions and specific embodiments, some modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. An airbag sealing unit, characterized in that: The device includes a flange ring, a cover ring, an insert 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 housing; a sealing groove is provided on the inner surface of the flange ring; the insert ring is placed inside the rubber sealing ring; a gap is provided between the insert ring and the rubber sealing ring; the rubber sealing ring is embedded in the sealing groove; one end of the inflation pipe is located on the outer surface of the flange ring; the other end of the inflation pipe is connected to the insert ring; and 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 one, a horizontal pipe section one, a horizontal pipe section two, and a vertical pipe section two. One end of the horizontal pipe section one is located on the large end face of the flange ring. The other end of the horizontal pipe section one is located on the vertical pipe section one. One end of the vertical pipe section one is located on the outer circumferential surface of the flange ring. The other end of the vertical pipe section one is located on the horizontal pipe section two. One end of the horizontal pipe section two is located on the small end face of one side of the flange ring. The other end of the horizontal pipe section two is located at one end of the vertical pipe section two. The other end of the vertical pipe section two 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 socket head cap screw. An O-ring is provided between the flange ring and the cover ring. A threaded blind hole is provided on the other side of the small end face of the flange ring. A threaded through hole is provided on the cover ring. The socket head cap screw passes through the threaded through hole and mates with the threaded blind hole. The head of the socket head cap screw is inserted into 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 provided between one side of the large end face of the flange and the end cover of the bearing housing.

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

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

7. The airbag sealing unit according to claim 1, characterized in that: It also includes hexagonal head bolts and washers, the hexagonal head bolts passing through the washers to thread the other side of the large end face of the flange ring to the end cap of the bearing housing.

8. The airbag sealing unit according to claim 1, characterized in that: It also includes an exhaust pipe located away from the flange 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.

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