CN203345154U

CN203345154U - Double-bullet tail structure of vessel

Info

Publication number: CN203345154U
Application number: CN2013200548125U
Authority: CN
Inventors: 吴金德; 李海森; 陈剑华; 吴航宇; 周文清
Original assignee: Popular Dockyard In Guiping City
Current assignee: Popular Dockyard In Guiping City
Priority date: 2013-01-31
Filing date: 2013-01-31
Publication date: 2013-12-18
Anticipated expiration: 2023-01-31

Abstract

The utility model provides a double-bullet tail structure of a vessel. The double-bullet tail structure of the vessel comprises a hull, wherein an arched half tunnel is arranged in the center line of the bottom of the stern of the vessel body; bullet tails are arranged on the two sides of the arched half tunnel respectively; a tail shaft, a propeller boss and propellers are installed on each bullet tail, wherein the bullet tails and the hull are of an integrated structure; meanwhile, a stern bottom plate is arranged above the bullet tails and the propellers. The double-bullet tail structure of the vessel reduces reverse thrust force of hull bottom water flow on the propellers and effectively reduces power consumption, thereby achieving energy-saving effects; a hull bottom is manufactured into a flat double-bullet tail structure, so that the hull bottom forms double flow lines when entering a wake flow region; the bullet tails can well transmit wake flow energy to the propellers smoothly to be recycled so as to improve propulsive efficiency and save energy, wherein the wake flow energy is generated when the vessel sails; the propellers are supported by the bullet tails, the circuity and stability of the propellers are improved, therefore, partial rolling of the propellers is reduced, and the service life of the propellers and the service life of a shaft system can be prolonged.

Description

A kind of binary boats and ships bullet stern construction

Technical field

The utility model relates to the shipbuilding technical field, is specially a kind of binary boats and ships bullet stern construction.

Background technology

China inland waters shipbuilding scholar as far back as last century late nineteen seventies just set about studying the energy-conservation of river steamer and ship speed problem, according to the Changjiang river vessel characteristics, Xijiang River freighter is to develop into motor barge from barge, and progressively from motor barge, develop into freighter, but the characteristic that is also retaining so far many barges, as only be provided with easy superstructure (or deck house); Ship molded breadth fertilizer, line style is dry straight; Bottom is flat; Shallow draft, the characteristic of the motor barge that cost barge characteristics such as low grade and main engine power are little.

The build process of the old-fashioned boats and ships of the traditional Shears still extensively adopted so far supporting marine rear shaft, especially at axle, be to have higher requirement aspect mounting process, and be in the mounting process process at axle, the installation of tail pipe and prop shaft Shears support arm is particularly important.Inland navigation craft shafting structure characteristics and installation requirement inland navigation craft mostly are the aft engine boat oceangoing ship, two-shipper, twin shafting, twin screw, and the axis vertical inclination angle is 1 ° ~ 2 °; Tailing axle is duplex bearing supported, and screw shaft pipe adopts oil lubrication, and sealing adopts J type skeleton type sealing arrangement.Screw shaft pipe front end (front bearing housing and tail pipe) welds mutually with ship hull plate and structure, and rear end (being the rear bearing housing) welds mutually by Shears support arm and ship hull plate.At first common ship axle system is dimensioned to shape in workshop by theory by Shears support arm, tailing axle tail pipe etc. while installing in advance, installs aboard ship with adjusting bolt is interim, and, by tail pipe in theoretical center line school, then welds herringbone support arm and tail pipe.After having welded, if tail pipe has distortion, adopt fire-water correcting technique to be revised.This technique is very simple, but the setting accuracy of tail pipe exists certain deviation because how no matter welding deformation controlled also, can not eliminate fully, the test stone that therefore a lot of shipyards are formulated be deviation be not more than 0.5 mm be qualified.

But the ship molded breadth fertilizer of lancha, linear straight can not the change, otherwise affect the cargo capacity of boats and ships, economic benefit is low; And tailing axle is that Open architecture easily causes the boats and ships draining, pollute the inland river water body.The initial test for the ship type of lancha, fixingly to place respectively several square wood, circular wood, observe the situation that current flow through slightly having in mobile pond, then be to develop into to adopt similar as bullet-headed wooden unit, observe its streamline situation, the end that discovery is large at diameter has the appearance of eddy current, and little end current are smooth and easy at diameter, if just a large diameter end and wash line style combine and can avoid the generation of eddy current, thereby avoided the boats and ships eddy current.How initial experiment is converted into to real achievement, reduces the repulsion power of hull bottom current to propeller, reduce kinetic equation loss and realize energy-saving effect, the phenomenon of containment tailing axle greasy dirt leak is extremely urgent.

The utility model content

The technical matters that the utility model solves is to provide a kind of binary boats and ships bullet stern construction, to solve the shortcoming in the above-mentioned background technology.

The technical matters that the utility model solves realizes by the following technical solutions:

A kind of binary boats and ships bullet stern construction, comprise hull, and its stern bottom midline position is provided with arch half tunnel, and arch half both sides, tunnel are respectively arranged with the bullet tail, and tailing axle, propeller boss, screw propeller are installed on the bullet tail, and bullet tail and hull are structure as a whole; Be provided with the stern base plate simultaneously above bullet tail and screw propeller.

In the utility model, hull bottom is flat, impels hull bottom to become double-current line to enter wake zone, and the wake energy that the bullet tail forms in the time of again can be preferably by ship's navigation is successfully delivered to propeller and reclaimed, thereby improves propulsion coefficient energy-conservation.

In the utility model, stern bottom midline position is provided with arch half tunnel, and the length in arch half tunnel is 2～4m, and width is 0.5～2m; And the width of arch half tunnel recess increases towards the stern direction gradually along stern bottom center line.It is linear at the stern of floating line that the purpose that arch half tunnel is set is to adapt to the beam, and make two tools mutually away from propeller obtain the straight suitable current of two streamlines from arch half tunnel and topside and supply water, improve propulsion coefficient, from stern, observe, be similar to " binary " or " two tail ", essence is monomer.

In the utility model, the stern base plate is straight and raise gradually and be covered in bullet tail and propeller top, is conducive to form a large-area wave suppression plate, can make the current on propeller blade and rudder blade straight, crossing current and oblique flow can not occur, and improve and advance usefulness and steerability; Also can prevent that empty phenomenon absolutely from producing, the sky of propeller, exposed tailing axle is degraded and plays a protective role absolutely, reduce or avoid degrading absolutely the impact on its intensity because of sky.

In the utility model, the bullet tail is fairing, with hull stream line pattern good combination, adopt arch half tunnel tail type to add the deficiency that bullet tail type makes up the barge type, make streamline from the hull afterbody start by the bullet tail straight enter propeller, reduce the friction drag of current, be the energy consumption that reduces engine installation, increase roundabout property and the stability of propeller, thereby reduce the local rolling of propeller, can extend the tenure of use of propeller and axle system.

In the utility model, adopt the number of sheets that increases propeller, thereby reduce the high-order exciting force, the comprehensive symmetry fleetline profile of bullet tail is better than Shears.

In the utility model, the bullet tail is the obturator structure, and first its interior welds operation completes and, through after the assay was approved, refills the weldering top board, by the sealing of bullet tail, effectively contains tailing axle greasy dirt leak phenomenon.

Beneficial effect: the utility model has reduced the repulsion power of hull bottom current to propeller, effectively reduces kinetic equation loss and realizes energy-saving effect; Hull bottom is made flat and binary bullet stern construction, impels hull bottom to become double-current line to enter wake zone, and the wake energy that the bullet tail forms in the time of can be preferably by ship's navigation is successfully delivered to propeller and reclaimed, thereby improves propulsion coefficient energy-conservation; Reduce thereby the bullet tail self is fairing the net effciency that waste of power improves boats and ships, reach energy-conservation 15%, the speed of a ship or plane increases by 15% effect; Support propeller with the bullet tail, increasing roundabout property and the stability of propeller, thereby reducing the local rolling of propeller, can extend the tenure of use of propeller and axle system.

The accompanying drawing explanation

The lateral plan that Fig. 1 is the utility model preferred embodiment.

Fig. 2 is the utility model preferred embodiment neutron bomb stern construction schematic diagram.

The specific embodiment

For technological means, creation characteristic that the utility model is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the utility model.

A kind of binary boats and ships bullet stern construction referring to Fig. 1, Fig. 2, comprise hull 1, its stern 2 bottom midline positions are provided with arch

half tunnel

3, and 3 both sides, arch half tunnel are respectively arranged with bullet tail 4, tailing axle 5, propeller boss, screw propeller are installed on bullet tail 4, and bullet tail 4 is structure as a whole with hull 1; Be provided with the stern base plate above bullet tail 4 and screw propeller simultaneously.

In the present embodiment, hull 1 bottom is flat, impels hull bottom to become double-current line to enter wake zone, and the wake energy that bullet tail 4 forms in the time of can be preferably by ship's navigation is successfully delivered to propeller and reclaimed, thereby improves propulsion coefficient energy-conservation.

In the present embodiment, stern 2 bottom midline positions are provided with arch half tunnel 3, and the length in arch half tunnel 3 is 2～4m, and width is 0.5～2m; And the width of arch half tunnel 3 recesses increases towards stern 2 directions gradually along stern bottom center line.It is linear that the purpose that arch half tunnel 3 is set is to adapt to the stern of the beam when floating line, and make two tools mutually away from propeller obtain the straight suitable current of two streamlines from arch half tunnel 3 and topside and supply water, improve propulsion coefficient.

In the present embodiment, stern 2 base plates are straight and raise gradually and be covered in bullet tail 4 and propeller top, are conducive to form a large-area wave suppression plate, can make the current on propeller blade and rudder blade straight, crossing current and oblique flow can not occur, and improve and advance usefulness and steerability; Also can prevent that empty phenomenon absolutely from producing, the sky of propeller, exposed tailing axle 5 is degraded and plays a protective role absolutely, reduce or avoid degrading absolutely the impact on its intensity because of sky.

In the present embodiment, bullet tail 4 is fairing, with hull 1 stream line pattern good combination, adopt arch half tunnel 3 tail types to add the deficiency that bullet tail 4 types make up the barge type, make streamline from hull 1 afterbody start by bullet tail 4 straight enter propeller, reduce the friction drag of current, be the energy consumption that reduces engine installation, increase roundabout property and the stability of propeller, thereby reduce the local rolling of propeller, can extend the tenure of use of propeller and axle system.

In the present embodiment, adopt the number of sheets that increases propeller, thereby reduce the high-order exciting force, the comprehensive symmetry fleetline profile of bullet tail 4 is better than Shears.

In the present embodiment, bullet tail 4 is the obturator structure, first, by its interior welds operation completion and through after the assay was approved, refills the weldering top board, by 4 sealings of bullet tail, effectively contains tailing axle 5 greasy dirt leak phenomenons.

Above demonstration and described groundwork of the present utility model, principal character and advantage of the present utility model.The technical personnel of the industry should be understood; the utility model is not restricted to the described embodiments; that in above-described embodiment and specification sheets, describes just illustrates principle of the present utility model; under the prerequisite that does not break away from the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall in claimed the utility model scope.The claimed scope of the utility model is defined by appending claims and equivalent thereof.

Claims

1. a binary boats and ships bullet stern construction, comprise hull, it is characterized in that, stern bottom midline position is provided with arch half tunnel, arch half both sides, tunnel are respectively arranged with the bullet tail, and tailing axle, propeller boss, screw propeller are installed on the bullet tail, and bullet tail and hull are structure as a whole; Be provided with the stern base plate simultaneously above bullet tail and screw propeller.

2. a kind of binary boats and ships bullet stern construction according to claim 1, is characterized in that, the length in arch half tunnel is 2～4m, and width is 0.5～2m; And the width of arch half tunnel recess increases towards the stern direction gradually along stern bottom center line.

3. a kind of binary boats and ships bullet stern construction according to claim 1, is characterized in that, the stern base plate is straight and raise gradually and be covered in bullet tail and propeller top.

4. a kind of binary boats and ships bullet stern construction according to claim 1, is characterized in that, the bullet tail is the obturator structure.