CN111348168A - Anti-reverse-turning air-suction shallow-draft propeller ship flow channel water blocking plate and mounting method thereof - Google Patents
Anti-reverse-turning air-suction shallow-draft propeller ship flow channel water blocking plate and mounting method thereof Download PDFInfo
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- CN111348168A CN111348168A CN201811584683.4A CN201811584683A CN111348168A CN 111348168 A CN111348168 A CN 111348168A CN 201811584683 A CN201811584683 A CN 201811584683A CN 111348168 A CN111348168 A CN 111348168A
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H1/00—Propulsive elements directly acting on water
- B63H1/02—Propulsive elements directly acting on water of rotary type
- B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
- B63H1/14—Propellers
- B63H1/28—Other means for improving propeller efficiency
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- Combustion & Propulsion (AREA)
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- Ocean & Marine Engineering (AREA)
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Abstract
The invention belongs to the technical field of a propeller ship, and particularly relates to a reverse-turning-prevention air-suction shallow-draft propeller ship flow channel water blocking plate and an installation method thereof. The water retaining plate body is arranged at the stern end of the water inlet flow channel and is rotationally connected with a stern sealing plate of a ship body through a reversible hinge, the water retaining plate body sequentially comprises a sealing nylon plate, a reinforcing aluminum plate and a pressing block steel plate towards the stern sealing plate, and the sealing nylon plate, the reinforcing aluminum plate and the pressing block steel plate are fixedly connected through fixing bolts. The invention overcomes the defects that the shallow draft propeller ship in the prior art is easy to have backing and air suction in the backing process, so that good backing thrust cannot be provided and the potential safety hazard of ship running is large, thereby successfully solving the problem that the propeller thrust is reduced due to the fact that the shallow draft propeller ship has insufficient draft and the air is sucked in by backing the ship; the condition that the operation cost is increased due to the fact that the ship also carries the pressurized load to achieve the design of draft no-load return is avoided; necessary guarantee is provided for the operations of offshore, landing, deceleration, scram, backing and the like in the whole voyage.
Description
Technical Field
The invention belongs to the technical field of a propeller ship, and particularly relates to a water baffle structure for preventing reverse driving and absorbing air of a propeller water inlet channel, in particular to a shallow draft propeller ship.
Background
For a propeller ship, particularly a shallow draft propeller ship sailing in coastal shoals or rivers and lakes in a dry season, the design key of the ship is to control the design draft, and a shipowner often requires that the maximum design draft of the ship must be smaller than the minimum water depth of an operating navigation area, for example, the draft is too large to exceed the water depth of the operating navigation area of the ship, so that the ship cannot normally operate, particularly the water depth in the dry season (sometimes 0.5m is possible), and the shipowner suffers inevitable loss.
As is known, a propeller needs to have enough draft to provide effective thrust, for a shallow draft propeller ship, the designed diameter of the propeller is small due to the draft limitation in a navigation area (sometimes, the diameter of a conventional propeller is too large, and even the diameter can be reduced by only using a tandem propeller while the thrust requirement is ensured), and in any case, the propeller needs to be submerged in water to provide thrust required for meeting the operation and control safety of the ship during navigation.
The propeller area often adopts comparatively common intake runner structure in hull design, and the runner linetype generally begins the hull minimum of suitable distance in stern axle front end, lifts gradually toward the propeller direction, reaches the peak in paddle department, and the back is extended gradually downwards to the tail shrouding and is ended, and the whole shape is like tail in the shrimp. In the design, except that being influenced by axle oar matching, still need consider the draft restriction, if in order to guarantee that whole runner tail end submerges, the runner line type descends too much after crossing the paddle, will hinder the screw propulsion wake, and then influences boats and ships navigational speed.
Or, although the designer considers the navigation speed and draught limitation of the ship, the optimal balance point is found for the design working conditions of the flow channel and the propeller, namely the full-load working condition, and the navigation speed and other various control tests are satisfied by the shipman when the ship is tested according to the design working conditions. However, in actual operation, a ship does not always sail only under a designed working condition, particularly, for passenger ships or freight ships with passenger flow periods in a navigation area, the ship is characterized in that the ship sails in a full-load no-load navigation mode (such as a passenger ship) or in a reverse mode (such as a freight ship), half of the time is spent in the no-load or half-load or other load conditions, and due to the fact that the draft is insufficient, the stern end of the flow channel is exposed out of the water surface, the situation that the ship backs up and sucks air often occurs. In addition, when the ship normally operates according to the design working condition, the situation of backing and emptying also happens occasionally, because the ship navigation state has multiple possibilities, for example, when a passenger ship in a shallow scenic area visits and observes the light or arrives at a port, passengers gather at the head part of a passenger cabin, for example, liquid in a liquid cabin cabinet (full cabin, half cabin, empty cabin and the like) in different use states, even wave in navigation causes the longitudinal up-and-down swing of the ship, and the stern end of a stern upwarp flow channel is exposed out of the water, so that the propeller is insufficient in water.
A wide shallow draft vessel, such as that of the grant publication No. CN106240736B, is provided with a hull structure of flat bottom and round bilge line type, and the side structure is provided in the form of an outboard side structure, the fold line of which forms at least one sunken concavity from bow to stern. The ship body is smooth, the rudder propeller is arranged on the side of the ship and works in an excellent flow field, and various performance indexes of the ship, such as rapidness, maneuverability, stability, safety and the like, can be obviously improved. However, the defects still exist, for example, in the process of backing up, the flow channel at the bottom of the ship often appears because the stern end of the flow channel is out of the water surface, so that the situation that the ship backs up and is emptied frequently occurs, the propeller is insufficient in draught, good backing-up thrust cannot be provided, and the driving safety of the ship body is seriously threatened.
Disclosure of Invention
The invention provides a reverse-driving-prevention and air-suction shallow-draft propeller ship flow channel water baffle plate and an installation method thereof, aiming at overcoming the defects that in the prior art, a shallow-draft ship is easy to reverse and suck in the process of reversing, so that good reverse thrust cannot be provided, and the potential safety hazard of ship driving is large.
In order to achieve the purpose, the invention is realized by the following technical scheme:
the utility model provides a prevent shallow draft propeller ship runner water blocking plate that falls car and inhale, rotates the water blocking plate body of being connected including one setting at the runner stern end of intaking and through the stern shrouding of hinge and hull that can overturn, water blocking plate body include sealed nylon board, reinforcing aluminum plate and briquetting steel sheet towards the stern shrouding in proper order, its three pass through fixing bolt fixed connection, reinforcing aluminum plate and briquetting steel sheet between still be provided with an insulating pad, sealed nylon board along the runner outward flange skew 30~50mm that intakes on the stern shrouding for sealed nylon board can cover the runner of intaking.
When the shallow draft propeller hull is fully loaded and unloaded, the states of the water inlet flow channels of the traditional shallow draft propeller hull are different, as shown in figures 1 to 3 in the attached drawings of the specification, when the shallow draft propeller hull is fully loaded, no matter the propeller enters a vehicle or reverses the vehicle, the water inlet flow channels of the shallow draft propeller hull are deep below the fully loaded waterline, so that air can not be sucked in the water inlet flow channels due to the movement of the propeller, and the thrust of the propeller can be ensured. And when no-load, the rising of hull for the runner upper end of intaking is located no-load waterline top, leads to forming certain gap between stern shrouding and the horizontal plane, and the screw backs a car the in-process can inhale the air through this gap, leads to the area of fetching water of screw to reduce, thereby makes the thrust of screw reduce greatly, can't satisfy operation requirement. The ship is not braked during sailing, and only the reverse thrust is provided by the reverse propeller to slow the sailing speed until the ship is stopped. For the captain, a ship whose reverse thrust cannot be guaranteed, such as a vehicle with no brake or trouble, is not dared to go on the road.
The anti-reverse-driving air-suction shallow-draft propeller ship flow channel water blocking plate can shield a gap between the stern sealing plate and the water surface when a ship body of a shallow-draft propeller ship is in no-load or the ship body inclines first, and the shallow-draft propeller ship flow channel water blocking plate is tightly attached to a water inlet flow channel due to the suction force of the propeller and the impact pressure of water flow when the propeller backs a car, so that air can be prevented from entering the water inlet flow channel at the bottom of the ship body, the region can be filled with water flow, the water fetching area of the propeller can be completely recovered, the backing thrust is guaranteed, and the driving safety of the ship body is greatly improved.
The sealing nylon plate can effectively seal the water inlet flow channel so as to prevent air from entering, and a rubber plate or similar sealing materials can be adopted. And a reinforced aluminum plate is arranged, the appearance of the reinforced aluminum plate is similar to that of the nylon plate, the overall strength is ensured, the nylon plate is prevented from deforming to suck air due to overlarge suction force, and the reinforced aluminum plate can also be made of a steel plate or other materials according to the specific conditions of the ship. Because the sealing nylon plate has certain buoyancy, a pressing block steel plate is needed to be arranged, the water blocking plate is guaranteed to be integrally sunk into the wake flow of the propeller and sucked when the vehicle is reversed, and the sealing nylon plate can be made of lead blocks and the like. If the pressing block and the reinforcing plate are made of different metal materials, an insulating pad needs to be arranged to prevent electrochemical corrosion.
Preferably, the reversible hinge comprises two fixing eye plates welded with the stern sealing plate and a locking bolt penetrating through the two fixing eye plates, and an aluminum outer sleeve is further sleeved on the part, located on the two fixing eye plates, of the locking bolt.
The reversible hinge can realize the reversible effect through the matching of the fixing eye plate, the locking bolt and the aluminum outer sleeve. Thereby can make the water baffle body can not influence the propulsive efficiency of screw along the rivers direction turn-ups when advancing along the vehicle-hour rivers direction along the impact that rivers sent when advancing, and when backing a car, the water baffle body can be because the suction of screw and the impact pressure of rivers, hug closely on the water inlet flow channel along the rivers direction when backing a car, can avoid the air to enter into the water inlet flow channel of hull bottom through the gap, resume the area of fetching water of screw, make the thrust of backing a car obtain guaranteeing, thereby the security of traveling of having guaranteed the hull promotes greatly.
Preferably, the aluminum outer pipe sleeve and the reinforcing aluminum plate are welded with each other and are in clearance fit with the locking bolt, so that the water retaining plate body can be rotatably connected to the stern sealing plate through the turnover hinge.
Preferably, one end of the locking bolt is in a handle shape, and the other end of the locking bolt is drilled with a cotter pin so that the locking bolt is fixedly connected with the fixing eye plate.
Be handle form with locking bolt one end, the drilling of the other end is provided with the split pin and can makes the position after the locking bolt is fixed can not take place to remove, has prevented the risk of locking bolt slippage.
The installation method of the runner water baffle plate of the anti-tip back suction shallow draft screw ship comprises the following steps:
(a) uniformly coating glue on the surfaces of the sealing nylon plate, the reinforcing aluminum plate, the insulating pad and the pressing block steel plate, sequentially bonding the sealing nylon plate, the reinforcing aluminum plate, the insulating pad and the pressing block steel plate, and then forming a water retaining plate body through fixing bolts;
(b) welding the upper end of a reinforcing aluminum plate in the fixed water baffle body with an aluminum outer sleeve;
(c) the sealing nylon plate of the water retaining plate body faces the stern sealing plate, and then the aluminum outer sleeve and the two fixing eye plates are connected in series through the locking bolt, so that the water retaining plate body is rotatably connected with the turnover hinge;
(d) and inserting a cotter pin into one end of the locking bolt, thereby fixing the water deflector body.
The anti-reverse-turning and air-suction shallow-draft propeller ship flow channel water baffle plate has the advantages of simpler components and simple installation steps, can effectively solve the problem that the reverse turning and air suction can occur in the driving process of the traditional shallow-draft propeller ship, has great technical progress, and provides good guarantee for the safe driving of the shallow-draft propeller ship.
Therefore, the invention has the following beneficial effects:
(1) the problem that the thrust of the propeller is reduced due to the fact that the shallow draft propeller ship backs up to suck air due to insufficient draft is solved;
(2) the condition that the operation cost is increased due to the fact that the ship also carries the pressurized load to achieve the design of draft no-load return is avoided;
(3) necessary guarantee is provided for the operations of offshore, landing, deceleration, scram, backing and the like in the whole voyage.
Drawings
Fig. 1 is a side view of a conventional shallow draft propeller vessel when fully loaded.
Fig. 2 is a side view of a conventional shallow draft propeller vessel when empty.
Fig. 3 is a comparative stern view of a conventional shallow draft screw ship when full and empty.
Figure 4 is a comparative side view of a shallow draft screw ship embodying the present invention at idle.
Fig. 5 is a stern view of a shallow draft screw ship embodying the present invention, both fully loaded and unloaded.
Fig. 6 is a side view of a water deflector.
FIG. 7 is a detail stern view of the barrage.
Wherein: the water inlet flow channel comprises a water inlet flow channel 1, a stern sealing plate 2, a water retaining plate body 3, a reversible hinge 4, a sealing nylon plate 5, a reinforcing aluminum plate 6, a pressing block steel plate 7, a fixing bolt 8, an insulating pad 9, a fixing eye plate 10, a locking bolt 11, an aluminum outer sleeve 12, a split pin 13, a full waterline 14, a no-load waterline 15, a gap 16, a propeller 17, a water flow direction 18 during entering and a water flow direction 19 during backing.
Detailed Description
The invention is further described with reference to the drawings and the specific embodiments.
As shown in fig. 6-7, a reverse turning prevention air suction shallow draft propeller ship flow channel water blocking plate comprises a water blocking plate body 3 which is arranged at the stern end of a water inlet flow channel 1 and is rotationally connected with a stern sealing plate 2 of a ship body through a reversible hinge 4, the reversible hinge 4 comprises two fixing eye plates 10 welded with the stern sealing plate 2 and a locking bolt 11 arranged through the two fixing eye plates 10, the part of the locking bolt 11 positioned on the two fixing eye plates 10 is also sleeved with an aluminum outer pipe sleeve 12, one end of the locking bolt 11 is in a handle shape, the other end of the locking bolt is drilled with an opening pin 13 to fixedly connect the locking bolt 11 with the fixing eye plates 10, the water blocking plate body 3 sequentially comprises a sealing nylon plate 5, a reinforcing aluminum plate 6 and a pressing block steel plate 7 towards the stern sealing plate 2, the sealing nylon plate 5, the reinforcing aluminum plate 6 and the pressing block steel plate 7 are fixedly connected through a fixing bolt 8, an insulating pad 9 is further arranged between the reinforcing aluminum plate 6 and the pressing block steel plate 7, strengthen aluminum plate 6 and the mutual welding of outer pipe box 12 of aluminium to with 12 clearance fit of locking bolt, make water-stop plate body 3 can rotate through 4 hinges that can overturn and connect in stern shrouding 2, sealed nylon plate 5 along the 1 outward flange skew of the inlet channel on the stern shrouding 2 ~50mm, make sealed nylon plate 5 can cover inlet channel 1.
The installation method of the runner water baffle plate of the anti-tip back suction shallow draft screw ship comprises the following steps:
a, uniformly coating glue on the surfaces of a sealing nylon plate 5, a reinforcing aluminum plate 6, an insulating pad 9 and a pressing block steel plate 7, sequentially bonding the sealing nylon plate, the reinforcing aluminum plate, the insulating pad and the pressing block steel plate, and then forming a water retaining plate body 3 through a fixing bolt 8;
b, welding the upper end of the reinforced aluminum plate 6 in the fixed water baffle body 3 with the aluminum outer sleeve 12;
c, facing a sealing nylon plate 5 of the water retaining plate body 3 to the stern sealing plate 2, and then connecting an aluminum outer sleeve 12 and two fixing eye plates 10 in series through a locking bolt 12 to enable the water retaining plate body 3 to be rotatably connected with the turnable hinge 4;
d inserting a cotter pin 13 into one end of the locking bolt 12, thereby fixing the water deflector body 3.
As shown in fig. 4 to 5, after the water baffle is installed at the stern end of the water inlet channel 1 of the conventional shallow draft propeller ship, when the ship backs, a gap between the upper part of the water inlet channel 1 and the idle waterline 15 is shielded by the water baffle, so that air is prevented from entering the water inlet channel 1, and the problem of propeller thrust reduction caused by air entering the water inlet channel 1 can be effectively prevented even when the shallow draft propeller ship is idle or changes in navigational state due to changes in the center of gravity; meanwhile, the condition that the running cost is increased due to the fact that the ship also carries the pressurized load to achieve the design of draft no-load return is avoided; and in the whole voyage, operations such as offshore, landing, deceleration, scram, backing and the like are performed, so that necessary guarantee is provided.
Claims (5)
1. The utility model provides a prevent shallow draft screw ship runner water blocking board that falls car and inhale, its characterized in that rotates the water blocking board body of being connected including one setting at the runner stern end of intaking and through the stern shrouding of hinge and hull that can overturn, water blocking board body include sealed nylon plate, enhancement aluminum plate and briquetting steel sheet towards the stern shrouding in proper order, its three pass through fixing bolt fixed connection, enhancement aluminum plate and briquetting steel sheet between still be provided with an insulating pad, sealed nylon plate along the runner outward flange of intaking on the stern shrouding skew 30~50mm for sealed nylon plate can cover the runner of intaking.
2. The runner water blocking plate of the anti-tip back suction shallow draft screw ship according to claim 1, wherein the reversible hinge comprises two fixing eye plates welded with the stern sealing plate and a locking bolt penetrating through the two fixing eye plates, and an aluminum outer sleeve is further sleeved on a part of the locking bolt positioned on the two fixing eye plates.
3. The flow channel water-stop plate of the anti-tip back suction shallow draft screw ship according to claim 2, wherein the aluminum outer pipe sleeve and the reinforced aluminum plate are welded with each other and are in clearance fit with the locking bolt, so that the water-stop plate body can be rotatably connected to the stern sealing plate through the turnable hinge.
4. The runner water stop plate of the anti-tip back suction shallow draft propeller ship according to claim 2 or 3, wherein one end of the locking bolt is handle-shaped, and the other end is drilled with a cotter pin to fixedly connect the locking bolt with the fixing eye plate.
5. A method for installing a runner water baffle plate of a reverse turning prevention suction shallow draft propeller ship according to claims 1-4, wherein the method for installing the runner water baffle plate comprises the following steps:
(a) uniformly coating glue on the surfaces of the sealing nylon plate, the reinforcing aluminum plate, the insulating pad and the pressing block steel plate, sequentially bonding the sealing nylon plate, the reinforcing aluminum plate, the insulating pad and the pressing block steel plate, and then forming a water retaining plate body through fixing bolts;
(b) welding the upper end of a reinforcing aluminum plate in the fixed water baffle body with an aluminum outer sleeve;
(c) the sealing nylon plate of the water retaining plate body faces the stern sealing plate, and then the aluminum outer sleeve and the two fixing eye plates are connected in series through the locking bolt, so that the water retaining plate body is rotatably connected with the turnover hinge;
(d) and inserting a cotter pin into one end of the locking bolt, thereby fixing the water deflector body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811584683.4A CN111348168A (en) | 2018-12-24 | 2018-12-24 | Anti-reverse-turning air-suction shallow-draft propeller ship flow channel water blocking plate and mounting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811584683.4A CN111348168A (en) | 2018-12-24 | 2018-12-24 | Anti-reverse-turning air-suction shallow-draft propeller ship flow channel water blocking plate and mounting method thereof |
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| CN111348168A true CN111348168A (en) | 2020-06-30 |
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| CN201811584683.4A Pending CN111348168A (en) | 2018-12-24 | 2018-12-24 | Anti-reverse-turning air-suction shallow-draft propeller ship flow channel water blocking plate and mounting method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114228933A (en) * | 2022-02-16 | 2022-03-25 | 英辉南方造船（广州番禺）有限公司 | Interception plate mechanism and use method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114228933A (en) * | 2022-02-16 | 2022-03-25 | 英辉南方造船（广州番禺）有限公司 | Interception plate mechanism and use method thereof |
| CN114228933B (en) * | 2022-02-16 | 2023-02-21 | 英辉南方造船（广州番禺）有限公司 | Interception plate mechanism and use method thereof |
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Application publication date: 20200630 |