CN105042084B - A kind of latent device/ship sealing device for stern tube maintenance is with sealing structure - Google Patents
A kind of latent device/ship sealing device for stern tube maintenance is with sealing structure Download PDFInfo
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- CN105042084B CN105042084B CN201510501335.6A CN201510501335A CN105042084B CN 105042084 B CN105042084 B CN 105042084B CN 201510501335 A CN201510501335 A CN 201510501335A CN 105042084 B CN105042084 B CN 105042084B
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- Prior art keywords
- ring
- slide block
- sealing
- stern tube
- housing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16J—PISTONS; CYLINDERS; SEALINGS
- F16J15/00—Sealings
- F16J15/16—Sealings between relatively-moving surfaces
- F16J15/34—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member
- F16J15/38—Sealings between relatively-moving surfaces with slip-ring pressed against a more or less radial face on one member sealed by a packing
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Sealing Devices (AREA)
Abstract
The invention discloses a kind of latent device/ship sealing device for stern tube maintenance and seal structure, including the housing being fixedly mounted in Ship Structure, it is provided with projection in the middle part of the inner ring of described housing, slide between described housing and stern tube shaft and be installed on slide block, the inner of described slide block is fixing is installed on block, described block, hydraulic cavities A is formed between slide block and the projection of housing, described housing is provided with the passage A connected with described hydraulic cavities A, the outer end of described slide block is provided with the shaft shoulder, hydraulic cavities B is formed between the shaft shoulder and the projection of housing of described slide block, described housing is provided with the passage B connected with described hydraulic cavities B, on the outer face of described slide block, sealing ring is installed, fix at a certain distance from the outer face of distance slide block on described stern tube shaft and be installed on back-up ring；The present invention can realize reliably sealing when device/ship sealing device for stern tube is dived in emergency maintenance, prevent external dynamic sea from entering sealing device for stern tube in the latent full depth bounds of device/ship.
Description
Technical field
The invention belongs to latent device/ship stern shaft seal technical field, particularly relate to a kind of latent device/ship sealing device for stern tube dimension
Repair with sealing structure.
Background technology
Sealing device for stern tube is one of visual plant of latent device/ship, seals stern tube shaft through pressure hull part, it is ensured that should
The sealing property at position.The existing latent device/ship sealing device for stern tube in home and abroad is typically close by machinery primary seal and multiple auxiliary
Envelope is composed in series.In normal operating conditions, machinery primary seal seals, and isolation external dynamic sea enters in cabin, and other is auxiliary
Sealing is helped not seal.Machinery primary seal is likely to be due to certain reason in actual motion and damages, for ensureing to have continued
Latent device/ship task or prevent a large amount of sea water from entering in cabin, the afterbody (near hull position) at sealing device for stern tube is provided with
Maintenance is with sealing structure, and this repairing sealing structure has the water surface and certain underwater sealing ability, prevents external dynamic sea from entering
Enter in machinery primary seal, in order to machinery primary seal is keeped in repair or plays emergent sealing function.
At present the dive maintenance sealing structure of device/ship sealing device for stern tube of home and abroad typically uses false pregnancy due to stagnation of QI seal form,
When machinery primary seal is keeped in repair, pour the air of certain pressure to false pregnancy due to stagnation of QI, make false pregnancy due to stagnation of QI tightly storehouse live tailing axle, isolate outboard
Sea water enters in machinery primary seal, in order to carry out maintenance work.Can only be at certain depth model but this maintenance seals structure
Enclose interior use, it is impossible to realize reliably sealing in the latent full depth bounds of device/ship.
Summary of the invention
It is an object of the invention to provide a kind of latent device/ship sealing device for stern tube maintenance sealing structure, it can be
Emergency maintenance dive device/ship sealing device for stern tube time, in the latent full depth bounds of device/ship realize reliably seal, prevent side of a ship off-lying sea
Water enters sealing device for stern tube.
The technical solution adopted for the present invention to solve the technical problems is:
Thering is provided the latent device of one/ship sealing device for stern tube maintenance with sealing structure, this sealing structure includes being fixedly mounted on
Housing in Ship Structure, is provided with projection in the middle part of the inner ring of described housing, sliding between described housing and stern tube shaft is installed on slide block,
The inner of described slide block is fixing is installed on block, forms hydraulic cavities A, described shell between described block, slide block and the projection of housing
Body is provided with the passage A connected with described hydraulic cavities A, and the outer end of described slide block is provided with the shaft shoulder, the shaft shoulder of described slide block and housing
Projection between formed hydraulic cavities B, described housing is provided with the passage B connected with described hydraulic cavities B, the outer face of described slide block
On sealing ring is installed, fixing at a certain distance from the outer face of distance slide block on described stern tube shaft being installed on back-up ring；
When need repairing sealing device for stern tube time, in hydraulic cavities B, inject hydraulic oil or compressed gas by passage B,
Promote slide block to move to the direction near back-up ring, until sealing ring is tightly pressed against on back-up ring, play sealing sealing device for stern tube
Effect；After having keeped in repair, in hydraulic cavities A, inject hydraulic oil or compressed gas by passage A, promote slide block to away from back-up ring
Direction move so that sealing ring depart from back-up ring, recover to initial non-tight state.
By technique scheme, the outer end of described back-up ring is provided with locating ring, and described locating ring is fixedly mounted on stern tube shaft.
By technique scheme, the external diameter of described hydraulic cavities A is close with the external diameter of hydraulic cavities B, and outside described hydraulic cavities A
Footpath is more than the diameter of sealing ring.
The beneficial effect comprise that: the present invention uses hydraulic oil (or compressed gas) as power source, Ke Yi
Stable, huge thrust is applied, it is ensured that the present invention can use in the latent full depth bounds of device/ship on sealing ring；Meanwhile, this
The sealing structure of bright employing end face-sealing ring, can bear great external dynamic sea pressure, it is ensured that the present invention can be very the biggest
Use in depth bounds, there is simple in construction, feature that reliability is high.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the invention will be further described, in accompanying drawing:
Fig. 1 is embodiment of the present invention structural representation when being in non-tight state.
Fig. 2 is embodiment of the present invention structural representation when being in sealing state.
In figure, 1-housing, 101-is protruding, 102-passage A, 103-passage B, 2-slide block, the 201-shaft shoulder, 3-sealing ring, 4-
Back-up ring, 5-locating ring, 6-bolt, 7-block, 8-Ship Structure, 9-screw, 10-stern tube shaft, 11-hydraulic cavities A, 12-hydraulic cavities B,
13-fixed block.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, right
The present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, not
For limiting the present invention.
As shown in Figure 1 and Figure 2, a kind of latent device/ship sealing device for stern tube maintenance is with sealing structure, and this sealing structure includes
The housing 1 being fixedly mounted in Ship Structure 8, is provided with protruding 101 in the middle part of the inner ring of housing 1, slide between housing 1 and stern tube shaft 10
Being installed on slide block 2, the inner of slide block 2 is fixing is installed on block 7, forms liquid between block 7, slide block 2 and the projection 101 of housing 1
Pressure chamber A11, housing 1 is provided with the passage A102 connected with hydraulic cavities A11, and the outer end of slide block 2 is provided with the shaft shoulder 201, the axle of slide block 2
Forming hydraulic cavities B12 between shoulder 201 and the projection 101 of housing 1, housing 1 is provided with the passage B103 connected with hydraulic cavities B12,
Sealing ring 3 is installed on the outer face of slide block 2, stern tube shaft 10 is fixed being installed on gear at a certain distance from the outer face of distance slide block 2
Circle 4；
When need repairing sealing device for stern tube time, in hydraulic cavities B12, inject hydraulic oil or compression by passage B103
Gas, promotes slide block 2 to move to the direction near back-up ring 4, until sealing ring 3 is tightly pressed against on back-up ring 4, plays sealing stern tube
The effect of sealing device；After having keeped in repair, in hydraulic cavities A11, inject hydraulic oil or compressed gas by passage A102, promote
Slide block 2 moves to the direction away from back-up ring 4 so that sealing ring 3 departs from back-up ring 4, recovers to initial non-tight state.
In a preferred embodiment of the invention, as it is shown in figure 1, the outer end of back-up ring 4 is provided with locating ring 5, the fixing peace of locating ring 5
Being contained on stern tube shaft 10, locating ring 5 is used for fixing back-up ring 4.
In a preferred embodiment of the invention, as it is shown in figure 1, the external diameter of hydraulic cavities A is close with the external diameter of hydraulic cavities B, and
The external diameter of described hydraulic cavities A is more than the diameter of sealing ring, so so that the present invention has self sealss ability under water so that this
Invent after realizing sealing, sealing ring automatic impaction can be made under by the board water effect, at hydraulic oil (or compressed air) etc.
Power source lost efficacy after, the present invention still can effectively seal, and substantially increases sealing reliability, it is ensured that dive during repairing device/ship and
Personal security.
The present invention is when specifically applying, and as shown in Figure 1 and Figure 2, housing 1 is arranged in Ship Structure 8 by bolt 6, block
7 are arranged on slide block 2 by screw 9 and fixed block 13, between housing and Ship Structure, between block and slide block, block and shell
All being installed on 0 RunddichtringO between body, between slide block and housing, the sealing ring that the outer face of slide block is installed is rubber seal
Ring.The present invention may be designed so that a part for sealing device for stern tube, it is possible to independent design becomes a device, for all kinds of
Latent device/ship and above water craft sealing device for stern tube repair Seal Design.
Under normal circumstances, as it is shown in figure 1, the present invention does not seals, sealing ring 3 does not contacts with back-up ring 4, between the two
Distance is S；When needs emergency repair sealing device, the present invention needs to seal, and hydraulic oil (or compressed air) passes through
Passage B enters hydraulic cavities B, promotes slide block 2 to move to back-up ring 4 direction, and the hydraulic oil in hydraulic cavities A (or air) is by logical simultaneously
Road A discharges, finally, after the effect sliding block 2 of hydraulic oil (or compressed air) moves S stroke, as in figure 2 it is shown, by sealing ring 3
It is compressed tightly against on back-up ring 4, thus blocks external dynamic sea and enter in machinery primary seal (in cabin)；When machinery primary seal has been repaired
After, it is not necessary to the present invention seals, and at this moment hydraulic oil (or compressed air) enters hydraulic cavities A by passage A, promotes slide block
2 move to back-up ring 4 rightabout, and the hydraulic oil in hydraulic cavities B (or air) is discharged by passage B simultaneously, finally, at hydraulic oil
The effect lower sealing ring 3 of (or compressed air) disengages with back-up ring 4, returns to initial non-tight state.
The following is the present invention and realize the principle of self sealss ability under water.
When the present invention seals, as in figure 2 it is shown, sealing ring 3 is tightly pressed against on back-up ring 4, at this moment act on sealing ring
On thrust be F0, F0Size by external dynamic sea pressure F1, pressure F in cabin2With hydraulic pressure F3Determine, wherein, F1、F2With
External dynamic sea pressure p1, latent device/ship cabin atmosphere pressure p2, sealing ring diameter D1, hydraulic cavities A outer diameter D2, hydraulic cavities B outer diameter D3Close
Cut is closed, and the relation between it can be represented by following formula:
F0=F1-F2+F3(1)；
F1=p1×(D2×D2-D1×D1)×π/4 (2)；
F2=p2×(D3×D3-D1×D1)×π/4 (3)。
From expression formula (1) if it can be seen that hydraulic pressure F3It is zero, then works as F1〉F2Time, still there is certain pressure to make close
Seal ring 3 is pressed on back-up ring 4, to stop external dynamic sea to carry out machinery primary seal (in cabin), continues to keep its sealing function.
It can be seen that external dynamic sea pressure F from expression formula (2)1By external dynamic sea pressure p1True with the difference in areas of sealing surface
Fixed.
Pressure F from expression formula (3) it can be seen that in cabin2By latent device/ship cabin atmosphere pressure p2Area with sealing surface
Difference determines.
External dynamic sea pressure p1, latent device/ship cabin atmosphere pressure p2With atmospheric environment pressure p3, density of sea water ρ, latent device/ship
Submerged depth h has a following relation:
p2≈p3(4)；
p1=p3+ρgh (5)。
It can be seen that cabin atmosphere pressure p from expression formula (4)2With atmospheric environment pressure p3Close.
It can be seen that external dynamic sea pressure p from expression formula (5)1Being determined by the submerged depth of latent device/ship, latent device/ship exists
In actually used, for ensureing the disguise of latent device/ship, repair machinery primary seal and carry out the most under water, now external dynamic sea pressure
Strong p1Much larger than latent device/ship cabin atmosphere pressure p2, p2It is negligible that (the sea water pressure during 100m degree of depth is approximately greatly under water
10 times that air pressure is strong, the sea water pressure during 1000m degree of depth is approximately 100 times of atmospheric pressure under water).
From expression formula (1)～(5), following formula can be obtained:
F0=(p3×D2×D2+ρgh×D2×D2-ρgh×D1×D1-p3×D3×D3)×π/4+F3 (6)。
From expression formula (6) it can be seen that when design of Sealing Structure, if dimension D2With dimension D3As close possible to or
Equal, within preferably difference 10mm, and D2More than D1, or external dynamic sea pressure p1Much larger than latent device/ship cabin atmosphere pressure p2,
Can ensure when the present invention carries out sealing operation under water, as hydraulic pressure F3Due to fault vanishing, still keep sealing
Can, there is self sealss ability under water, now, thrust F0Can be reduced to following formula:
F0=ρ gh × (D2×D2-D1×D1)×π/4 (7)。
It should be appreciated that for those of ordinary skills, can be improved according to the above description or be converted,
And all these modifications and variations all should belong to the protection domain of claims of the present invention.
Claims (3)
1. latent device/ship sealing device for stern tube maintenance seals structure, it is characterised in that this sealing structure includes fixing peace
The housing being contained in Ship Structure, is provided with projection in the middle part of the inner ring of described housing, sliding between described housing and stern tube shaft is installed on
Slide block, the inner of described slide block is fixing is installed on block, forms hydraulic cavities A, institute between described block, slide block and the projection of housing
Stating housing and be provided with the passage A connected with described hydraulic cavities A, the outer end of described slide block is provided with the shaft shoulder, the shaft shoulder of described slide block with
Forming hydraulic cavities B between the projection of housing, described housing is provided with the passage B connected with described hydraulic cavities B, outside described slide block
Sealing ring is installed on end face, described stern tube shaft is fixed being installed on back-up ring at a certain distance from the outer face of distance slide block；
When need repairing sealing device for stern tube time, in hydraulic cavities B, inject hydraulic oil or compressed gas by passage B, promote
Slide block moves to the direction near back-up ring, until sealing ring is tightly pressed against on back-up ring, plays the work sealing sealing device for stern tube
With；After having keeped in repair, in hydraulic cavities A, inject hydraulic oil or compressed gas by passage A, promote slide block to the side away from back-up ring
To movement so that sealing ring departs from back-up ring, recover to initial non-tight state.
Sealing structure the most according to claim 1, it is characterised in that the outer end of described back-up ring is provided with locating ring, described fixed
Position ring is fixedly mounted on stern tube shaft.
Sealing structure the most according to claim 1, it is characterised in that the external diameter of described hydraulic cavities A and the external diameter of hydraulic cavities B
Close, and the external diameter of described hydraulic cavities A is more than the diameter of sealing ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510501335.6A CN105042084B (en) | 2015-08-14 | 2015-08-14 | A kind of latent device/ship sealing device for stern tube maintenance is with sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510501335.6A CN105042084B (en) | 2015-08-14 | 2015-08-14 | A kind of latent device/ship sealing device for stern tube maintenance is with sealing structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105042084A CN105042084A (en) | 2015-11-11 |
| CN105042084B true CN105042084B (en) | 2016-12-14 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510501335.6A Active CN105042084B (en) | 2015-08-14 | 2015-08-14 | A kind of latent device/ship sealing device for stern tube maintenance is with sealing structure |
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| CN (1) | CN105042084B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105156683B (en) * | 2015-11-03 | 2017-03-01 | 东台船用配件有限公司 | Slidingtype locking sealing device |
| CN107477181A (en) * | 2017-07-31 | 2017-12-15 | 浙江大学 | A kind of underwater sealing structure |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4482159A (en) * | 1984-03-26 | 1984-11-13 | Mitsubishi Jukogyo Kabushiki Kaisha | Stern tube seal device |
| CN101021269A (en) * | 2007-03-23 | 2007-08-22 | 李世彬 | Adjustable self-lubricating synchronous sealing device for ship stern shaft |
| CN101311584A (en) * | 2008-04-01 | 2008-11-26 | 胡年丰 | Shock resistance axial seal device for screw shaft of ship |
| CN102748474A (en) * | 2012-07-19 | 2012-10-24 | 上海德宝密封件有限公司 | Integrated sealing device applicable to stern shaft |
| CN102966740A (en) * | 2012-11-20 | 2013-03-13 | 中国舰船研究设计中心 | Water lubrication deep-water passive dual-end-face stern shaft tube sealing device |
| CN203571044U (en) * | 2013-11-12 | 2014-04-30 | 泰州市慧通机械工程有限公司 | Water lubrication sealing device for ships |
-
2015
- 2015-08-14 CN CN201510501335.6A patent/CN105042084B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4482159A (en) * | 1984-03-26 | 1984-11-13 | Mitsubishi Jukogyo Kabushiki Kaisha | Stern tube seal device |
| CN101021269A (en) * | 2007-03-23 | 2007-08-22 | 李世彬 | Adjustable self-lubricating synchronous sealing device for ship stern shaft |
| CN101311584A (en) * | 2008-04-01 | 2008-11-26 | 胡年丰 | Shock resistance axial seal device for screw shaft of ship |
| CN102748474A (en) * | 2012-07-19 | 2012-10-24 | 上海德宝密封件有限公司 | Integrated sealing device applicable to stern shaft |
| CN102966740A (en) * | 2012-11-20 | 2013-03-13 | 中国舰船研究设计中心 | Water lubrication deep-water passive dual-end-face stern shaft tube sealing device |
| CN203571044U (en) * | 2013-11-12 | 2014-04-30 | 泰州市慧通机械工程有限公司 | Water lubrication sealing device for ships |
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| Publication number | Publication date |
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| CN105042084A (en) | 2015-11-11 |
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