CN203035965U - Opening air bag for stern shaft pressurized sealing device - Google Patents
Opening air bag for stern shaft pressurized sealing device Download PDFInfo
- Publication number
- CN203035965U CN203035965U CN 201220217940 CN201220217940U CN203035965U CN 203035965 U CN203035965 U CN 203035965U CN 201220217940 CN201220217940 CN 201220217940 CN 201220217940 U CN201220217940 U CN 201220217940U CN 203035965 U CN203035965 U CN 203035965U
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- Prior art keywords
- air bag
- opening air
- lateral faces
- sealing device
- annular lateral
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Abstract
The utility model relates to a stern shaft pressurized sealing device, in particular to improvement of an opening air bag for a stern shaft pressurized sealing device. The opening air bag for the stern shaft pressurized sealing device comprises two annular lateral faces and a circular tubular subface, wherein the two annular lateral faces are arranged in an opposite mode along the axial direction. Inner circumference edges on the two annular lateral faces are connected with two ends of the circular tubular subface, and the inner circumference edges on the two annular lateral faces and the two ends of the circular tubular subface form a whole. Gaps are located between outer circumference edges on the two annular lateral faces. The largest axial distance between the outer circumference edges on the two annular lateral faces is greater than the largest axial distance between the inner circumference edges on the two annular lateral faces. The opening air bag for the stern shaft pressurized sealing device is good in sealing property, long in service life and convenient to manufacture, install and use.
Description
Technical field:
The utility model relates to the screw shaft of ship pressurized seal device, relates in particular to the improvement of pressure bladder in the pressurized seal device.
Background technique:
The screw shaft of ship pressurized seal device is with its superior performance, easy to use, simple in structure and be widely used in screw shaft of ship sealing, common and the screw shaft of ship water lubrication seal arrangement supporting use together of pressurized seal device, pressurized seal device is not worked in the ship's navigation, the screw shaft of ship sealing is finished by other seal arrangement, when boats and ships at sea need repairing, for not making the water inlet of ship storehouse, be convenient to maintenance, after stern tube shaft is stopped operating, in pressure bladder, charge into pressurized air again, pressure bladder is expanded, and be pressed on the stern tube shaft, stop seawater to enter, thereby implement pressurized seal, the assurance maintenance work is normally carried out.Present pressurized seal device is made of pressurized seal seat and the pressure bladder that is installed in the pressurized seal seat, the pressure bladder that uses mostly is the rubber seal air bag of airtight and hollow at present, its structure is similar to the inner tube of a tyre of bicycle, the cross-section of pressure bladder is rectangle, the deficiency of this pressure bladder: the one, the manufacture process more complicated, adopt the interior inflating die manufacturing of more complicated, and can not guarantee the wall thickness uniformity, pressure bladder differs in size to the pressure of stern tube shaft when making pressure bladder work, and sealing effect is not very desirable; The 2nd, install more loaded down with trivial detailsly, a bar shaped rubber suction tude is arranged on the pressure bladder, to suction tude be connected and be fixed on the source of the gas valve during installation, also to make suction tude in the raw, there are not phenomenons such as tensile deformation; Three are to use in the process, and the impact of high pressure draught makes pressure bladder be shifted easily, and tensile deformation takes place the suction tude that is communicated with source of the gas on the pressure bladder sometimes, its root is easy to damage, and suction tude also can stop up sometimes, causes seal failure, leads to a disaster.In addition, this pressure bladder during fabrication, suction tude is to stick with glue to be connected on the utricule, aging, gas leakage takes place easily, cause sealability to descend even inefficacy, and the more change poles inconvenience of pressure bladder can't be implemented at sea, generally to lie up and to change, bring certain unsafe factor for the safe operation of boats and ships.
The model utility content:
At the above-mentioned deficiency of existing in prior technology, technical problem to be solved in the utility model is that a kind of ship stern tube shaft pressurized seal device opening air bag will be provided, its good seal performance, and long service life, and also manufacturing, installation and use are all very convenient.
In order to solve the problems of the technologies described above, the utility model ship stern tube shaft pressurized seal device opening air bag, comprise two ring sides and a pipe shape bottom surface of being oppositely arranged vertically, inner circumferential edge on described two ring sides is connected with the two ends of described pipe shape bottom surface, and constitute an integral body, gapped between the outer circumferential edges on described two ring sides, and on described two ring sides the maximum axial distance between the outer circumferential edges greater than the maximum axial distance between the inner circumferential edge on described two ring sides.
After adopting such scheme, because the inner circumferential edge on the pressure bladder on two ring sides is connected with the two ends of pipe shape bottom surface, and constitute an integral body, gapped between the outer circumferential edges on two ring sides, thereby the cross-section of pressure bladder is the hollow shape of indent, form open type pressure bladder (being called for short the opening air bag), the cross-section of packing in the open type pressure bladder during work is that the ring of " H " type divides compression ring, divide compression ring to be provided with inlet hole, the pressurized air of the source of the gas valve directly inlet hole from minute compression ring enters the open type pressure bladder, got rid of the bar shaped rubber suction tude on the old-fashioned pressure bladder, this makes the suction tude root be eliminated because of the defective that tensile deformation damages, prolonged the working life of seal arrangement, and when installing directly with opening air bag setting-in to the pressurized seal seat, save suction tude and the operation that the source of the gas valve is connected, improved labor productivity; Owing to divide the aperture of inlet hole on the compression ring bigger, can blockage phenomenon, improved the reliability of seal arrangement.Again since on two ring sides the maximum axial distance between the outer circumferential edges greater than the maximum axial distance between the inner circumferential edge on two ring sides, thereby the opening air bag can slippage in the pressurized seal seat, has guaranteed the stability of pressurized seal device work.On the other hand, the opening air bag can no longer adopt complicated interior inflating die manufacturing by the direct compression molding of simple mould, shorten manufacturing time, reduced cost of production, and the wall thickness uniformity, the opening air bag improves sealability to the pressure uniformity of stern tube shaft during work.
Ship stern tube shaft pressurized seal device is called ship stern tube shaft air sac sealing device again.
Ship stern tube shaft pressurized seal device is called ship stern tube shaft pneumatic tyre seal arrangement again.
The opening air bag adopts the rubber manufacturing.
The bottom surface of opening air bag thickness vertically is thin, the thick middle in two ends, and bottom surface and the ship stern tube shaft of opening air bag fit tightly when being conducive to pressurized seal device work.
Description of drawings:
Below in conjunction with the drawings and specific embodiments the utility model ship stern tube shaft pressurized seal device is further described with the opening air bag,
Fig. 1 is the plan view of the utility model embodiment's structural representation.
Fig. 2 is the utility model embodiment's cross-section sectional view.
Fig. 3 is the schematic representation of the utility model embodiment's use state.
Embodiment:
Among Fig. 1, Fig. 2, ship stern tube shaft pressurized seal device is made of two ring sides 1 and a pipe shape bottom surface 2 of being oppositely arranged vertically with the opening air bag, inner circumferential edge on two ring sides 1 is connected with the two ends of pipe shape bottom surface 2, and constitute an integral body, gapped between the outer circumferential edges on two ring sides 1, and on two ring sides 1 the maximum axial distance m between the outer circumferential edges greater than the maximum axial distance n between the inner circumferential edge on two ring sides 1.Bottom surface 2 thickness vertically of opening air bag is thin, the thick middle in two ends, and bottom surface and the ship stern tube shaft of opening air bag fit tightly when being conducive to pressurized seal device work.
Among Fig. 3, ship stern tube shaft pressurized seal device is made up of air bag seat 4, opening air bag, air bag gland 3, and air bag seat 4 is fixed by bolts on the hull.The opening air bag is installed in the air bag seat 4, the side of the gentle bag pressure lid 3 of the inwall that two ring sides 1 of opening air bag are pressed close to air bag seat 4 respectively.The ring that the cross-section is installed is " H " type in the opening air bag divides compression ring 6, and divides compression ring 6 gentle bag pressures lids 3 jointly with the clamping of opening air bag and be fixed in the air bag seat 4 by air bag seat 4, ring.Divide compression ring 6 to be provided with vent, air bag seat 4 is provided with port 5.During work, open gas source valve (gas source valve does not draw among the figure), pressurized air is the port from the air bag seat 45 and divide the vent on the compression ring 6 to enter opening air bag inside directly, because two ring sides 1 of opening air bag are subjected to the constraint that air bag seat 4, ring divide compression ring 6 gentle bag pressures lids 3, the extruding of pipe shape bottom surface 2 compressed gas of opening air bag and be pressed on stern tube shaft 7 surfaces, thus play seal action.
Claims (2)
1. ship stern tube shaft pressurized seal device opening air bag, comprise two the ring sides (1) and the pipe shape bottom surface (2) that are oppositely arranged vertically, inner circumferential edge on described two ring sides (1) is connected with the two ends of described pipe shape bottom surface (2), and constitute an integral body, it is characterized in that: gapped between the outer circumferential edges on described two ring sides (1), and the maximum axial distance between the last outer circumferential edges in described two ring sides (1) is greater than the maximum axial distance between the last inner circumferential edge in described two ring sides (1).
2. ship stern tube shaft pressurized seal device opening air bag according to claim 1, it is characterized in that: the bottom surface of described opening air bag (2) thickness vertically is thin, the thick middle in two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220217940 CN203035965U (en) | 2012-05-11 | 2012-05-11 | Opening air bag for stern shaft pressurized sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220217940 CN203035965U (en) | 2012-05-11 | 2012-05-11 | Opening air bag for stern shaft pressurized sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203035965U true CN203035965U (en) | 2013-07-03 |
Family
ID=48688094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220217940 Expired - Fee Related CN203035965U (en) | 2012-05-11 | 2012-05-11 | Opening air bag for stern shaft pressurized sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203035965U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103342212A (en) * | 2013-07-19 | 2013-10-09 | 黄山徽厨食品有限公司 | Sealing device of steaming tank |
| CN114888283A (en) * | 2021-01-25 | 2022-08-12 | 南京以太通信技术有限公司 | Feeding box |
-
2012
- 2012-05-11 CN CN 201220217940 patent/CN203035965U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103342212A (en) * | 2013-07-19 | 2013-10-09 | 黄山徽厨食品有限公司 | Sealing device of steaming tank |
| CN114888283A (en) * | 2021-01-25 | 2022-08-12 | 南京以太通信技术有限公司 | Feeding box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130703 Termination date: 20140511 |