CN109649572A - A kind of open type Stern tunnel backing performance Enhancement Method and its device - Google Patents
A kind of open type Stern tunnel backing performance Enhancement Method and its device Download PDFInfo
- Publication number
- CN109649572A CN109649572A CN201811254727.7A CN201811254727A CN109649572A CN 109649572 A CN109649572 A CN 109649572A CN 201811254727 A CN201811254727 A CN 201811254727A CN 109649572 A CN109649572 A CN 109649572A
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- CN
- China
- Prior art keywords
- tunnel
- open type
- stern
- backing
- performance enhancement
- 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
- 238000000034 method Methods 0.000 title claims abstract description 17
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 230000007306 turnover Effects 0.000 claims abstract description 3
- 238000007789 sealing Methods 0.000 claims description 18
- 229910000754 Wrought iron Inorganic materials 0.000 claims description 12
- 229910000831 Steel Inorganic materials 0.000 claims description 10
- 239000010959 steel Substances 0.000 claims description 10
- 238000005096 rolling process Methods 0.000 claims description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 claims 1
- 238000007654 immersion Methods 0.000 abstract description 5
- 239000003651 drinking water Substances 0.000 abstract description 3
- 235000020188 drinking water Nutrition 0.000 abstract description 3
- 239000003643 water by type Substances 0.000 abstract description 3
- 230000001141 propulsive effect Effects 0.000 description 5
- 238000013461 design Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000002474 experimental method Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012857 repacking Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B1/00—Hydrodynamic or hydrostatic features of hulls or of hydrofoils
- B63B1/02—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement
- B63B1/04—Hydrodynamic or hydrostatic features of hulls or of hydrofoils deriving lift mainly from water displacement with single hull
- B63B1/08—Shape of aft part
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B3/00—Hulls characterised by their structure or component parts
- B63B3/14—Hull parts
- B63B3/40—Stern posts; Stern frames
Abstract
The invention discloses a kind of open type Stern tunnel backing performance Enhancement Method and its devices, the closed structure type in tail portion in similar enclosed tunnel is formed in hull tail portion, therefore need to increase a device, ensure that open type tunnel forms confined space in tail portion in reversing, tunnel upper air is allowed to be evacuated, vacuum is formed, it is full then to suck water filling, so that propeller is also in whole immersion waters when reversing；But this device is switched in positive vehicle, is not influenced tunnel and is drained backward；In summary it needs, installs a turnover baffle additional after stern transom plate, when positive vehicle is pushed open using hydro-flow thrust backward, it is ensured that open type tunnel-shaped；It is simple that the present invention for the shallow draft ship that is limited by drinking water provides a kind of structure, it is high-efficient, the device of the raising backing performance of low cost, the device can effectively improve the maneuverability of open type tunnel ship, by the project implementation, device that is a kind of cheap and efficiently improving ship backing performance can be provided for ship similar from now on.
Description
Technical field
The present invention relates to Stern tunnel design field, specifically a kind of open type Stern tunnel backing performance Enhancement Method and its
Device.
Background technique
Lijiang River Water scenery is beautiful, and water tourism industry is flourishing, but since drinking water limits, to guarantee propeller efficiency, Lijiang River
Pleasure boat design uses stern Stern tunnel, and in order to ensure pushing away positive vehicle into efficiency, using open type tunnel, but open type tunnel has
Simultaneously, backing performance is poor for preferably positive vehicle propulsive efficiency.
Its vertical profile shape is pressed in tunnel, is divided into two class of open type tunnel and enclosed tunnel.
Open type tunnel resistance is small, and positive vehicle navigation propulsive efficiency is higher than enclosed tunnel, but backing performance is poor.Enclosed tunnel resistance
Greatly, efficiency is lower than open type tunnel when positive vehicle, but backing performance is good.The object ship that this project is implemented is newly-built 76 seats reserved for guests or passengers four of Lijiang River
Star sightseeing boat, since Lijiang River water is shallow, this ship designed draft uses the spiral shell of 0.56m for 0.52m in order to improve propeller efficiency
Paddle is revolved, is cut operating costs using Stern tunnel in order to guarantee host propulsive efficiency, open type Stern tunnel is selected.But simultaneously by
In Lijiang River, ship is more, and density of navigating is big, therefore the car-backing function as braking action, it is also necessary to powerful enough.
Linear straight after open type tunnel screw propeller, tunnel middle line is higher by waterline, when positive vehicle navigates by water, propeller drains backward,
Exhaust, propeller front space gradually form vacuum, full by front water inlet filling, and tunnel can be full of water, and propeller all impregnates
In water, can ensure that has preferable positive vehicle propulsive efficiency.But when moving backward, propeller is drained and is vented forward, due to propeller
It is developing zone to the region after ship, air is continuously replenished, and cannot form vacuum, therefore tunnel cannot be full of water, propeller has
Part is not impregnated in water, and thrust has loss, thus propulsive efficiency is low.Sightseeing boat has confirmed when shaking down, without backing performance
When enhancement device acts on, back-up speed only has~1kn (1.85km/h).
Stern tunnel design has an awkward selection, selects open type tunnel to guarantee positive vehicle efficiency but loses backing performance,
The backing performance that selection enclosed tunnel has obtained but reduces positive vehicle efficiency, in order to improve the reversing of this type Lijiang River pleasure boat
Can, carry out research of the invention, it is therefore an objective to ensure that open type tunnel also has preferable backing performance in reversing.
Summary of the invention
The purpose of the present invention is to provide a kind of open type Stern tunnel backing performance Enhancement Method and its devices, on solving
State the problem of proposing in background technique.
To achieve the above object, the invention provides the following technical scheme:
A kind of open type Stern tunnel backing performance Enhancement Method will be sealed in the tail portion that hull tail portion forms similar enclosed tunnel
The structure type closed, it is therefore desirable to increase a device, it is ensured that open type tunnel forms confined space in tail portion in reversing, allows tunnel
Upper air is evacuated, and forms vacuum, and it is full then to suck water filling, so that propeller is also in whole immersion waters when reversing；But this
Device is switched in positive vehicle, is not influenced tunnel and is drained backward；In summary it needs, installing one additional after stern transom plate may be reversed
Baffle, when positive vehicle pushed open using hydro-flow thrust backward, it is ensured that open type tunnel-shaped；When reversing, by the resistance of water by baffle
On stream pressure stern transom plate, the confined space in similar enclosed tunnel is formed.
A kind of open type Stern tunnel backing performance enhancement device, including backing plate, sleeve, rod iron, sealing plate, rubber pad and circle
Steel, the backing plate are equipped with two pieces, and backing plate front end is fixedly welded on stern transom plate, and the rear end of backing plate is fixedly connected with sleeve, and two
Rod iron is rotatably connected between sleeve；The sealing plate upper end is fixedly connected with the side of rod iron, after sealing plate is by one piece of steel plate setting-out
It rolls, the sealing plate rear end is connected with round steel, and the arc-shaped edges of round steel and arc panel are tangent；Sealing plate rear end is bolted
It is connected with rubber pad.
Further, the sealing plate rolling angle should be 170 °.
Further, the length of the sleeve is 50mm and specification is φ 34x5mm.
Further, between the sleeve between be divided into 200mm.
Further, the rod iron length is 300mm and specification is φ 20.
Further, the backing plate with a thickness of 8mm.
Further, the rubber pad with a thickness of increase 4mm.
Compared with prior art, the beneficial effects of the present invention are: providing one kind for the shallow draft ship limited by drinking water
Structure is simple, high-efficient, and the device of inexpensive raising backing performance, the device can effectively improve the maneuverability of ship, pass through
The project implementation can provide device that is a kind of cheap and efficiently improving ship backing performance for ship similar from now on.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of open type Stern tunnel backing performance enhancement device.
Fig. 2 is the front view of open type Stern tunnel backing performance enhancement device.
Fig. 3 is the side sectional view of open type Stern tunnel backing performance enhancement device.
Fig. 4 is that open type Stern tunnel backing performance enhancement device applies the structural schematic diagram on hull.
Fig. 5 is that open type Stern tunnel backing performance enhancement device applies the partial structural diagram on hull.
Specific embodiment
The technical solution of the patent is explained in further detail With reference to embodiment.
Fig. 1-5, a kind of open type Stern tunnel backing performance Enhancement Method are please referred to, the reversing for improving open type tunnel promotes effect
Rate will form the closed structure type in tail portion in similar enclosed tunnel, it is therefore desirable to increase a device, it is ensured that open from principle
Formula tunnel forms confined space in tail portion in reversing, and tunnel upper air is allowed to be evacuated, and forms vacuum, then sucks water filling
It is full, so that propeller is also in whole immersion waters when reversing；But this device is switched in positive vehicle, does not influence tunnel to heel row
Water.In summary it needs, installs a turnover baffle additional after stern transom plate, when positive vehicle is pushed open using hydro-flow thrust backward, really
Protect open type tunnel-shaped；When reversing, baffle stream is pressed on stern transom plate by the resistance of water, forms the confined air in similar enclosed tunnel
Between.
According to the analysis of causes, a set of stern tube shaft tunnel retaining device is devised, mainly improves reversing using the function of the device
When propeller efficiency, due to there is no condition to do tank experiment, so the project can only be proved on real ship.Because there is no ship model number
According to support, worry will increase the resistance of appendage, and speed of a ship or plane when influencing positive vehicle takes immersion underwater so baffle designs small as far as possible
40mm production baffle fabrication and installation simultaneously do prototype testing.
1, lift stern tube shaft baffle when sea trial, shipowner's machine is allowed to turn respectively with economic speed 1470rpm/min and highest
Fast 2160rpm/min reversing 15min records astern speed, and discovery data are~1kn.
2, baffle is put down, above procedure is repeated, finds the unchanged Ren Ranwei~1kn of data.
In the observation tunnel site discovery of ship stern, when ship is in state of rolling backward, propeller passes through tunnel to stern water suction
Effect, makes to differ 100mm or so with around according to the variation of revolving speed in the water level of tunnel face, while having a large amount of bubbles to produce in tunnel
It is raw.1# sightseeing boat ship lies up repacking, observes in depressed place, it is found that gap is larger between baffle and stern transom plate.Although according to the analysis, reversing
When, baffle is bonded stern transom plate, but since gap exists, confined space vacuumizing effect is very bad, almost without effect.It therefore must
Leakproofness when reversing must be increased.
Therefore stern tube shaft tunnel baffle has been redesigned, plate thickness is increased into 8mm, increases 4mm rubber slab, rolled in hinge position
One angle, it is ensured that plane fitting.Immersed depth is increased into 150mm, increases the closing depth of water.Since the arrangement of four rudder of ship is tight
It is close, when full-helm, stern tube shaft baffle immersion depth is such as continued growing, rudder blade can be encountered, therefore can not continue to increase.
Experimental procedure 1,2 is repeated when shaking down after improvement；By observation, when reversing, stern tube shaft baffle has fitted closely stern tube shaft tunnel,
And hollow phenomenon is not present in baffle, has few bubble to generate at tunnel.Through shiphoard measurement, it is found that astern speed can reach
2.5kn has greatly been more than the 1kn speed of a ship or plane that baffle is not arranged.
Open type Stern tunnel backing performance enhancement device, including backing plate 1, sleeve 2, rod iron 3, sealing plate 4, rubber pad 5 and circle
Steel 6, the backing plate 1 are equipped with two pieces, and 1 front end of backing plate is fixedly welded on stern transom plate, and the rear end of backing plate 1 is fixedly connected with sleeve 2,
The length of sleeve 2 is 50mm and specification is φ 34x5mm, between sleeve 2 between be divided into 200mm, the company of rotation between two sleeves 2
It is connected to rod iron 3,3 length of rod iron is 300mm and specification is φ 20；
4 upper end of sealing plate is fixedly connected with the side of rod iron 3, and sealing plate is rolled by one block of plate, and rolling angle is
170°；
4 rear end of sealing plate is connected with round steel 6, and round steel 6 and the arc-shaped edges of sealing plate are tangent；4 rear end of sealing plate is solid by bolt
Surely it is connected with rubber pad 5.
The preferred embodiment of the patent is described in detail above, but this patent is not limited to above-mentioned embodiment party
Formula within the knowledge of one of ordinary skill in the art can also be under the premise of not departing from this patent objective
It makes a variety of changes.
Claims (8)
1. a kind of open type Stern tunnel backing performance Enhancement Method, which is characterized in that form similar enclosed tunnel in hull tail portion
The closed structure type in the tail portion in road, it is therefore desirable to increase a device, it is ensured that open type tunnel tail portion in reversing forms closed
Space allows tunnel upper air to be evacuated, and forms vacuum, and it is full then to suck water filling, so that propeller also all soaks when reversing
Do not have in water；But this device is switched in positive vehicle, is not influenced tunnel and is drained backward；In summary it needs, adds after stern transom plate
Fill a turnover baffle, when positive vehicle is pushed open using hydro-flow thrust backward, it is ensured that open type tunnel-shaped；When reversing, by water
Resistance baffle stream is pressed on stern transom plate, form the confined space in similar enclosed tunnel.
2. a kind of open type Stern tunnel backing performance enhancement device, which is characterized in that including backing plate, sleeve, rod iron, sealing plate, rubber
Rubber mat and round steel, the backing plate are equipped with two pieces, and backing plate front end is fixedly welded on stern transom plate, and the rear end of backing plate is fixedly connected with set
Tin, rod iron is rotatably connected between two sleeves；The sealing plate upper end is fixedly connected with the side of rod iron, by one after sealing plate setting-out
Block plate rolls；The sealing plate rear end is connected with round steel, and the arc-shaped edges of round steel and arc panel are tangent；Sealing plate rear end passes through bolt
It is fixedly connected with rubber pad.
3. open type Stern tunnel backing performance Enhancement Method according to claim 2 and its device, which is characterized in that described
The rolling angle of sealing plate should be 170 °.
4. open type Stern tunnel backing performance Enhancement Method according to claim 2 and its device, which is characterized in that described
The length of sleeve is 50mm and specification is φ 34x5mm.
5. open type Stern tunnel backing performance Enhancement Method according to claim 2 and its device, which is characterized in that described
200mm is divided between sleeve.
6. open type Stern tunnel backing performance Enhancement Method according to claim 2 and its device, which is characterized in that described
Rod iron length is 300mm and specification is φ 20.
7. open type Stern tunnel backing performance Enhancement Method according to claim 2 and its device, which is characterized in that described
Backing plate with a thickness of 8mm.
8. open type Stern tunnel backing performance Enhancement Method according to claim 2 and its device, which is characterized in that described
Rubber pad with a thickness of increase 4mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811254727.7A CN109649572A (en) | 2018-10-26 | 2018-10-26 | A kind of open type Stern tunnel backing performance Enhancement Method and its device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811254727.7A CN109649572A (en) | 2018-10-26 | 2018-10-26 | A kind of open type Stern tunnel backing performance Enhancement Method and its device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109649572A true CN109649572A (en) | 2019-04-19 |
Family
ID=66110724
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811254727.7A Pending CN109649572A (en) | 2018-10-26 | 2018-10-26 | A kind of open type Stern tunnel backing performance Enhancement Method and its device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109649572A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191128726A (en) * | 1911-12-20 | 1912-02-29 | Alfred Fernandez Yarrow | Improvements in Propeller Chambers or Tunnels for Shallow Draught Vessels. |
| GB104211A (en) * | 1916-02-23 | 1917-02-23 | Harold Edgar Yarrow | Improvements in Propeller Chambers or Tunnels for Shallow Draught Vessels. |
| GB182221A (en) * | 1921-03-31 | 1922-06-30 | Hugh Mcreynolds | A new or improved method or arrangement for propelling shallow draft and other vessels and boats |
| GB723707A (en) * | 1953-08-20 | 1955-02-09 | Aldous Successors Ltd | Improvements in or relating to the propulsion of waterborne vessels |
| SE8202504L (en) * | 1981-04-22 | 1982-10-23 | Escher Wyss Gmbh | CREATE WITH ATMINSTONE A PROPELLER |
| US6544081B1 (en) * | 2001-10-10 | 2003-04-08 | Douglas G. Paulo | Boat hull with tunnel structure |
| CN209290608U (en) * | 2018-10-26 | 2019-08-23 | 中船西江造船有限公司 | A kind of open type Stern tunnel backing performance enhancement device |
-
2018
- 2018-10-26 CN CN201811254727.7A patent/CN109649572A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB191128726A (en) * | 1911-12-20 | 1912-02-29 | Alfred Fernandez Yarrow | Improvements in Propeller Chambers or Tunnels for Shallow Draught Vessels. |
| GB104211A (en) * | 1916-02-23 | 1917-02-23 | Harold Edgar Yarrow | Improvements in Propeller Chambers or Tunnels for Shallow Draught Vessels. |
| GB182221A (en) * | 1921-03-31 | 1922-06-30 | Hugh Mcreynolds | A new or improved method or arrangement for propelling shallow draft and other vessels and boats |
| GB723707A (en) * | 1953-08-20 | 1955-02-09 | Aldous Successors Ltd | Improvements in or relating to the propulsion of waterborne vessels |
| SE8202504L (en) * | 1981-04-22 | 1982-10-23 | Escher Wyss Gmbh | CREATE WITH ATMINSTONE A PROPELLER |
| US6544081B1 (en) * | 2001-10-10 | 2003-04-08 | Douglas G. Paulo | Boat hull with tunnel structure |
| CN209290608U (en) * | 2018-10-26 | 2019-08-23 | 中船西江造船有限公司 | A kind of open type Stern tunnel backing performance enhancement device |
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| PB01 | Publication | ||
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Application publication date: 20190419 |