CN110219987A - Constant low back pressure ship stern sealing device - Google Patents
Constant low back pressure ship stern sealing device Download PDFInfo
- Publication number
- CN110219987A CN110219987A CN201910589502.5A CN201910589502A CN110219987A CN 110219987 A CN110219987 A CN 110219987A CN 201910589502 A CN201910589502 A CN 201910589502A CN 110219987 A CN110219987 A CN 110219987A
- Authority
- CN
- China
- Prior art keywords
- sealing
- back pressure
- stern
- constant low
- corrosion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000007789 sealing Methods 0.000 title claims abstract description 125
- 239000013535 sea water Substances 0.000 claims abstract description 37
- 239000000314 lubricant Substances 0.000 claims abstract description 28
- 238000005260 corrosion Methods 0.000 claims abstract description 21
- 230000007797 corrosion Effects 0.000 claims abstract description 21
- 229910001220 stainless steel Inorganic materials 0.000 claims description 19
- 239000010935 stainless steel Substances 0.000 claims description 18
- 230000003068 static effect Effects 0.000 claims description 9
- 230000001050 lubricating effect Effects 0.000 claims description 7
- 125000006850 spacer group Chemical group 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 5
- 239000000919 ceramic Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 3
- 230000001360 synchronised effect Effects 0.000 claims description 2
- 238000005204 segregation Methods 0.000 abstract description 2
- 230000006866 deterioration Effects 0.000 description 3
- 239000000839 emulsion Substances 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000012864 cross contamination Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 230000001154 acute effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H23/00—Transmitting power from propulsion power plant to propulsive elements
- B63H23/32—Other parts
- B63H23/34—Propeller shafts; Paddle-wheel shafts; Attachment of propellers on shafts
-
- 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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3204—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip
- F16J15/3232—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings with at least one lip having two or more lips
-
- 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
- F16J15/32—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings
- F16J15/3284—Sealings between relatively-moving surfaces with elastic sealings, e.g. O-rings characterised by their structure; Selection of materials
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Sealing With Elastic Sealing Lips (AREA)
- Sealing Devices (AREA)
Abstract
The present invention relates to a kind of constant low back pressure stern sealing devices, by rotary part, stationary parts, back pressure keep valve group at, the rotary part is bolted on propeller hub body or stern tube shaft attachment by corrosion-resistant, the stationary parts is bolted to hull shaft strut flange by corrosion-resistant, and rotatory sealing connects between rotary part and stationary parts, medium separate cavities are equipped between the stationary parts and rotary part, medium separate cavities external connection back pressure keeps valve, the back pressure keeps the precision spring of one constant-tension of setting in valve, it can ensure that compressed gas keeps valve member pressure drop to stablize by back pressure.Stern sealing device lubricant medium and external sea water segregation can be achieved in the present invention, and the pressure scope of application of lift-off seal device optimizes the running environment of sealing element, effectively extension seal life, and improves operational reliability.
Description
Technical field
The present invention relates to a kind of ship power propulsion system, especially a kind of ship stern sealing device.
Background technique
Stern sealing device is the core match part of ship power thruster system, realizes drive shaft system high speed rotation operating condition
Seawater enters the function inside cabin outside lower barrier.Stern sealing device is made of rotary part, stationary parts etc., rotary part
Stainless steel bushing, sea water resistance fastener and static seal comprising outer round surface Jing Guo special superpressed processing etc., stationary parts
Include 3~4 sealing elements, sealing element spacer ring and sealing support frame etc..Stern sealing device is arranged in propulsion system stern tube shaft hull
It at water outlet, prevents surrounding seawater from entering cabin, while preventing lubricant medium leakage pollution seawater in stern tube.It is now widely available
Stern sealing device sealing element use 2 waterproofs and 1~2 grease proofing structure type.However dynamic sealing presence can not
The micro-leakage avoided can cause the cross contamination of seawater Yu internal lubrication medium, on the one hand lubricant medium be caused to emulsify
Greasy property is caused to reduce, the leakage meeting pollution of marine environment of another aspect lubricant medium causes ecological disruption.In addition, traditional stern
Sealing device is only applicable to the heavy deep ship for being not more than 15m of stern tube shaft, as ship is gradually enlarged, the use of traditional stern sealing by
To limitation；Ship operational configuration by wave, spring up or moment impact etc. influences, the generation of stern sealing device external water pressure is not advised
Rule or acute variation, the random fluctuating change of sealing element back pressure have a certain impact to service life.Therefore, current urgent
It needs to design to invent and a kind of avoid seawater and lubricant medium cross contamination, is applicable in higher heavy depth, the constant low back pressure of sealing element
Ship stern sealing device, improve service life with reliability, reduce lubricating system frequency of maintenance, meet current green intelligent ship
The environmental protection and synergy demand of oceangoing ship equipment.
Summary of the invention
The present invention is to provide for a kind of constant low back pressure ship stern sealing device, leaks to surrounding for obstructing lubricant medium
Seawater avoids pollution environment, realizes environmentally protective；It prevents seawater from entering propulsion system drive shaft system lubricant medium chamber, avoids moistening
Sliding medium meets seawater emulsion deterioration, extends lubricating system maintenance period；Stern sealing device voltage endurance capability is improved, it is heavy deep suitable to expand it
Use range；It is discharged the shafting of ship power propulsion system and is in pressure frequent fluctuation or when by moment impact, sealing device
Constant low back pressure is born, sealing element running environment is improved, extends seal life, realizes that stern is close by the above measure
Seal apparatus lubricant medium and external sea water segregation, the pressure scope of application of lift-off seal device optimize the operation ring of sealing element
Border, effectively extension seal life, and improve operational reliability.
To achieve the above object, the technical scheme is that a kind of constant low back pressure stern sealing device, by rotating part
Part, stationary parts, back pressure keep valve group at the rotary part is bolted to propeller hub body or stern tube shaft attachment by corrosion-resistant
On, the stationary parts is bolted to hull shaft strut flange by corrosion-resistant, and between rotary part and stationary parts
Rotatory sealing connection, is equipped with medium separate cavities, medium separate cavities external connection back pressure between the stationary parts and rotary part
Valve is kept, the back pressure keeps the precision spring of one constant-tension of setting in valve, it can be ensured that compressed gas is kept by back pressure
Valve member pressure drop is stablized.
Further, the rotary part is made of stainless steel torus, static seal, corrosion-resistant bolt, described stainless
Steel torus is connect with stern tube shaft clearance fit；One of static seal of the stainless steel torus arrangement of bores, stern pipe is lubricated
Chamber is isolated with propeller hub lubricating cavity；The stainless steel torus is fixed on propeller hub body or stern tube shaft attachment by corrosion-resistant bolt, is made
Rotary part and stern tube shaft synchronous rotary.
Further, the outer circle seal lip contact area of the stainless steel torus is ceramic coated, hard for improving surface
Degree increases wearability.
Further, the stationary parts include sealing element, sealing caulking ring, sealing support frame, before, during and after sealing caulking ring
Successively laminate, before, during and after four sealing elements are embedded between sealing caulking ring, and be fixed to sealing support using corrosion-resistant bolt
On frame, composition stern seals stationary parts support construction.
Further, the sealed support is connected and sealed with hull shaft strut by planar sealing pad, and the stern is close
Stationary support structure is sealed to be fixed on hull shaft strut by corrosion-resistant bolt.
Further, the sealing element one in four sealing element, the opening of sealing element two prevent sea towards seawater side
Water enters lubricant medium chamber；Sealing element three, the opening of sealing element four prevent lubricant medium towards stern tube lubricant medium chamber side
Into seawater.
Further, the medium separate cavities are arranged between intermediate seal spacer ring and stainless steel torus, are used for anti-stop
The micro-leakage seawater that state rotation generates mutually is polluted with lubricant medium；The top body of the medium separate cavities be disposed with one into
Gas channel, bottom is disposed with a return-air drain outlet, for realizing air inlet and dirt eliminating function；The inlet channel and return-air row
Dirty channel is being disposed with an annular stationary sealing ring with each sealing caulking ring contact position.
Further, it is high precision load balanced valve that the back pressure, which keeps valve, and medium separate cavities and surrounding seawater is made to keep permanent
Determine low voltage difference, back pressure keeps valve to be threadedly coupled with intermediate seal spacer ring by precision thin, and screw thread end face is disposed with sea water resistance sealing
Washer.
The beneficial effects of the present invention are:
Constant low back pressure stern sealing device of the invention, the micro seawater and profit that the medium separate cavities of use generate rotation
Sliding dielectric leakage object is collected, and is recycled in cabin by return-air mudhole, is avoided lubricant medium from leaking to external seawater and is caused
Environmental pollution, while preventing seawater from entering lubricant medium chamber and causing lubricant medium emulsion deterioration.It is set in the outside of medium separate cavities
Counting a back pressure keeps valve that medium is isolated by the continual compressed air that is passed through using high precision load balance valve core
Chamber and lubricant medium chamber and external seawater keep lower constant differential pressure, improve the heavy deep range of use of stern sealing, and extend
Its service life, suitable for there are the use environments that frequent impact pressure load changes.
Detailed description of the invention
Fig. 1 is constant low back pressure ship stern sealing device structure figure of the invention；
In figure: 1. stern tube shafts, 2. propeller hub bodies or stern tube shaft attachment, 3. static seals, 4. corrosion-resistant bolts one, 5. stainless steels circle
Ring body, 6. sealing caulking rings one, 7. corrosion-resistant bolts two, 8. sealing elements one, 9. sealing elements two, 10. sealing caulking rings two, 11.
Medium separate cavities, 12. back pressures keep valve, and 13. annular stationary sealing rings, 14. sealing elements three, 15. sealing caulking rings three, 16. is resistance to
Corrode bolt three, 17. craft thread plugs, 18. planar sealing pads, 19. air inlets, 20. sealing support frames, 21. sealing elements
Four, 22. plug screws, 23. return-air holes, 24. ceramics, 25. hull shaft struts.
Specific embodiment
With reference to the accompanying drawing with embodiment the invention will be further described
As shown in Figure 1, a kind of environmentally friendly constant low back pressure ship stern sealing device, mainly by rotary part, static
Component and back pressure keep 12 three parts of valve composition.
Rotary part includes static sealing body 3, corrosion-resistant bolt 1, stainless steel torus 5,5 outer circle of stainless steel torus
Seal lip contact area ceramic coated 24 improves surface hardness and increases wearability.5 inner hole of stainless steel torus and stern tube shaft 1 are small
Clearance fit, rotary part are fixed on propeller hub body or stern tube shaft attachment 2 by corrosion-resistant bolt 1.5 inner hole of stainless steel torus
It arranges one of static seal 3, stern pipe lubricating cavity is isolated with propeller hub lubricating cavity.
Stationary parts is by sealing element 1, sealing element 29, sealing element 3 14, sealing element 4 21, sealing caulking ring
One 6, sealing caulking ring 2 10, sealing caulking ring 3 15, sealing support frame 20, medium separate cavities 11, planar sealing pad 18, air inlet
19, return-air hole 23, corrosion-resistant bolt 3 16 etc. form.Sealing caulking ring 1, sealing caulking ring 2 10, sealing caulking ring 3 15 are successively folded
Pressure, and be fixed on sealing support frame 20 using corrosion-resistant bolt 27, composition stern seals stationary part support construction.Three sealings
Four sealing elements are embedded between spacer ring, wherein sealing element 1, the opening of sealing element 29 be towards seawater side, prevent seawater into
Enter lubricant medium chamber；Sealing element 3 14, the opening of sealing element 4 21 prevent lubricant medium towards stern tube lubricant medium chamber side
Into seawater.Sealing caulking ring 2 10 designs a medium separate cavities 11, seals the micro-leakage object that member rotation generates and accumulates in Jie
Matter separate cavities, the micro-leakage seawater that can prevent dynamic rotary from generating mutually are polluted with lubricant medium, barrier lubricant medium leakage
To surrounding seawater, it is environmentally protective to avoid pollution environment realization, while preventing seawater from entering propulsion system drive shaft system lubricant medium
Chamber avoids lubricant medium from meeting seawater emulsion deterioration, extends maintenance period.Between sealing caulking ring 2 10 and stainless steel torus 5
One air inlet 19 of top layout of medium separate cavities 11, a return-air hole 23 is arranged in bottom, by being constantly passed through pressed gas
In the timely pressure to cabin of leakage accumulated in medium separate cavities 11.Air inlet 19 and return-air hole 23 are in sealing caulking ring two
10, the contact position of sealing caulking ring 3 15 and sealing support frame 20 is disposed with an annular stationary sealing ring 13, seals support frame
20 are sealed with hull shaft strut 25 by planar sealing pad 18.Stern seals stationary support structure and relies on corrosion-resistant bolt three
Fixed to hull shaft strut.Wherein, the lip of sealing element 1, sealing element 29, sealing element 3 14, sealing element 4 21
Mouth Position Design has accurate holddown spring, after calculating and analyzing spring compression seal lip, sealing element 1, sealing element
29, non-tight side pressure resistance 0.2bar~0.3bar of sealing element 3 14, sealing element 4 21.
It is high precision load balanced valve, inside one precision spring of arrangement, it is ensured that compressed gas passes through that back pressure, which keeps valve 12,
Valve pressure drop is stablized, and sealing element and lubricant medium and seawater back pressure is made to be maintained at 0.1bar~0.2bar constant low pressure value, is close
It seals element 1, sealing element 29, sealing element 3 14, sealing element 4 21 and creates excellent running environment, improve stern sealing
Device using heavy deep range, prolong the service life, the extreme environment suitable for the variation of frequent impact pressure load.Back pressure keeps valve
12 are threadedly coupled with sealing caulking ring 2 10 by precision thin, and screw thread end face is disposed with sea water resistance seal washer.Back pressure keeps valve 12
Spool carries out special designing, and internal gas can enter surrounding seawater by spool one-way flow, and seawater cannot be introduced into medium
Separate cavities.
Above-described embodiment is merely to illustrate technical solution of the present invention and principle, wherein the structure of each component, connection type, etc.
It may be changed, all equivalents carried out based on the technical solution of the present invention and improvement reach this hair
The bright effect that should be embodied, should not exclude except protection scope of the present invention.
Claims (8)
1. a kind of constant low back pressure stern sealing device, by rotary part, stationary parts, back pressure keep valve group at, it is characterised in that:
The rotary part is bolted on propeller hub body or stern tube shaft attachment by corrosion-resistant, and the stationary parts passes through corrosion-resistant bolt
It is connected to hull shaft strut flange, and rotatory sealing connects between rotary part and stationary parts；The stationary parts and rotation
Medium separate cavities are equipped between rotation member, the medium separate cavities external connection back pressure keeps valve, and the back pressure keeps setting in valve
Set the precision spring of a constant-tension, it can be ensured that compressed gas keeps valve member pressure drop to stablize by back pressure.
2. constant low back pressure stern sealing device according to claim 1, it is characterised in that: the rotary part is by stainless steel
Torus, static seal, corrosion-resistant bolt composition, clearance fit connects between the stainless steel torus and stern tube shaft；It is described
Stainless steel torus one of static seal of arrangement of bores is isolated by stern pipe lubricating cavity with propeller hub lubricating cavity；The stainless steel circle
Ring body is fixed on propeller hub body or stern tube shaft attachment by corrosion-resistant bolt, makes rotary part and stern tube shaft synchronous rotary.
3. constant low back pressure stern sealing device according to claim 1, it is characterised in that: outside the stainless steel torus
Circle seal lip contact area is ceramic coated, increases wearability for improving surface hardness.
4. constant low back pressure stern sealing device according to claim 1, it is characterised in that: the stationary parts includes sealing
Element, sealing caulking ring, sealing support frame, before, during and after sealing caulking ring successively laminate, before, during and after be embedded in four between sealing caulking ring
Road sealing element, and be fixed on sealing support frame using corrosion-resistant bolt, composition stern seals stationary parts support construction.
5. constant low back pressure stern sealing device according to claim 4, it is characterised in that: the sealed support and hull stern
Bracing strut is connected and sealed by planar sealing pad, and the stern sealing stationary support structure is fixed to ship by corrosion-resistant bolt
On body shaft strut.
6. constant low back pressure stern sealing device according to claim 4, it is characterised in that: in four sealing element
Sealing element one, the opening of sealing element two prevent seawater from entering lubricant medium chamber towards seawater side；Sealing element three, sealing member
The opening of part four prevents lubricant medium from entering seawater towards stern tube lubricant medium chamber side.
7. constant low back pressure stern sealing device according to claim 4, it is characterised in that: the medium separate cavities setting exists
Micro-leakage seawater and lubricant medium phase between intermediate seal spacer ring and stainless steel torus, for preventing dynamic rotary from generating
Mutually pollution；The top body of the medium separate cavities is disposed with an inlet channel, and bottom is disposed with a return-air drain outlet, uses
In realization air inlet and dirt eliminating function；The inlet channel and return-air drain outlet are arranged with each sealing caulking ring contact position
There is an annular stationary sealing ring.
8. constant low back pressure stern sealing device according to claim 4, it is characterised in that: it is high-precision that the back pressure, which keeps valve,
Load balance valve is spent, medium separate cavities and surrounding seawater is made to keep constant low voltage difference, back pressure keeps valve and intermediate seal spacer ring logical
Precision thin threaded connection is crossed, screw thread end face is disposed with sea water resistance seal washer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910589502.5A CN110219987A (en) | 2019-07-02 | 2019-07-02 | Constant low back pressure ship stern sealing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910589502.5A CN110219987A (en) | 2019-07-02 | 2019-07-02 | Constant low back pressure ship stern sealing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110219987A true CN110219987A (en) | 2019-09-10 |
Family
ID=67815607
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910589502.5A Pending CN110219987A (en) | 2019-07-02 | 2019-07-02 | Constant low back pressure ship stern sealing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110219987A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111946827A (en) * | 2020-07-21 | 2020-11-17 | 丹东克隆集团有限责任公司 | Mechanical sealing device for sewage pump |
| CN113247226A (en) * | 2021-05-11 | 2021-08-13 | 中交广州航道局有限公司 | Device for preventing oil leakage and water leakage of stern shaft seal and using method thereof |
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| CN200940686Y (en) * | 2006-06-17 | 2007-08-29 | 东台船有用配件有限公司 | Split oil lubrication stern shaft seal device |
| CN201517611U (en) * | 2009-10-12 | 2010-06-30 | 东台市远洋船舶配件有限公司 | Novel oil lubricating stern shaft sealing device |
| CN204127322U (en) * | 2014-09-03 | 2015-01-28 | 浙江增洲造船有限公司 | A kind of marine rear shaft compressed air sealing device |
| DE102014223345B3 (en) * | 2014-11-17 | 2015-10-22 | Schaeffler Technologies AG & Co. KG | Shaft arrangement and water turbine with a shaft arrangement |
| CN107676483A (en) * | 2017-09-27 | 2018-02-09 | 上海中车汉格船舶与海洋工程有限公司 | PODDED PROPULSOR spindle seal system |
| CN210461694U (en) * | 2019-07-02 | 2020-05-05 | 中国船舶重工集团公司第七0四研究所 | Constant low back pressure ship stern sealing device |
-
2019
- 2019-07-02 CN CN201910589502.5A patent/CN110219987A/en active Pending
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|---|---|---|---|---|
| CN200940686Y (en) * | 2006-06-17 | 2007-08-29 | 东台船有用配件有限公司 | Split oil lubrication stern shaft seal device |
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| CN204127322U (en) * | 2014-09-03 | 2015-01-28 | 浙江增洲造船有限公司 | A kind of marine rear shaft compressed air sealing device |
| DE102014223345B3 (en) * | 2014-11-17 | 2015-10-22 | Schaeffler Technologies AG & Co. KG | Shaft arrangement and water turbine with a shaft arrangement |
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| CN210461694U (en) * | 2019-07-02 | 2020-05-05 | 中国船舶重工集团公司第七0四研究所 | Constant low back pressure ship stern sealing device |
Non-Patent Citations (1)
| Title |
|---|
| 马培良、郑必前: "大中型船舶新型艉轴密封装置介绍", 中国水运, vol. 14, no. 7, 31 July 2014 (2014-07-31), pages 2 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111946827A (en) * | 2020-07-21 | 2020-11-17 | 丹东克隆集团有限责任公司 | Mechanical sealing device for sewage pump |
| CN113247226A (en) * | 2021-05-11 | 2021-08-13 | 中交广州航道局有限公司 | Device for preventing oil leakage and water leakage of stern shaft seal and using method thereof |
| CN113247226B (en) * | 2021-05-11 | 2022-08-19 | 中交广州航道局有限公司 | Device for preventing oil leakage and water leakage of stern shaft seal and using method thereof |
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