CN203005688U

CN203005688U - Bottom structure for air curtain anti-drag boat

Info

Publication number: CN203005688U
Application number: CN2012207159778U
Authority: CN
Inventors: 曹漪
Original assignee: Individual
Current assignee: Individual
Priority date: 2012-12-21
Filing date: 2012-12-21
Publication date: 2013-06-19
Anticipated expiration: 2022-12-21

Abstract

The utility model relates to a bottom structure for an air curtain anti-drag boat. A small amount of discrete bubbles can enter into a propulsion system to bring harm of damage to propeller blades and the like when an existing boat which is produced through the technology of air curtain anti-drag works. To overcome the shortcomings of the existing boat which is produced through the technology of air curtain anti-drag, the technical scheme of the bottom structure includes that the portion of the bottom of the boat, where a propulsion unit is mounted, is provided with a smooth surface without bubbles along the longitudinal direction, wherein the smooth surface is provided with a certain width, a vertical height which is lower than an air curtain layer and a length which starts from the position of an injection nozzle to the projection position of propellers or the position which is behind a water inlet of a waterjet. The smooth surface is provided with the vertical height which is lower than the air curtain layer, the bubbles float upwards under the buoyancy of water, and both the propeller blades which are arranged under the rear projection surface of the smooth surface without bubbles and the water inlet of the waterjet cannot be affected. Compared with the prior art, the bottom structure enables the air curtain layer at the bottom of the boat not to affect the propulsion efficiency of the propellers or the waterjet and does not increase the production cost.

Description

A kind of bottom construction for air curtain drag reduction ships and light boats

Technical field

The utility model relates to a kind of bottom construction form for air curtain drag reduction ships and light boats, specifically, is in order to make air curtain drag reduction ships and light boats when navigation, a kind of version of avoiding the bubble of air curtain layer to enter screw propeller or waterjet propulsor water pump.

Background technology

The flat ships and light boats that this type of drag reduction technology of many employings such as existing resistance reduction by air cavity, bubble drag-reduction, air curtain drag reduction is made, effectively reduced the friction drag between ships and light boats surface and water, greatly improved the speed of a ship or plane of ships and light boats, reduced significantly energy resource consumption, the technical scheme of disconnected level place's layering horizontal jet that Chinese patent ZL201120401105.X proposes has been applied to Drag Reduction by Bubble Curtain again dark V-type hull.But adopt the ships and light boats of this type of fabrication techniques, no matter be flat-bottomed boat or V-type hull, a same problem is faced in the capital: during the ships and light boats navigation, play the air curtain layer of drag reduction effect, have a small amount of discrete bubble and enter the water pump of screw propeller or waterjet propulsion, therefore reduced propulsion coefficient, damaged propeller blade and reduced service life of screw propeller.

Summary of the invention

The utility model proposes a kind of bottom construction form for air curtain drag reduction ships and light boats.No matter be flat-bottomed boat or V-type hull, adopted this version, can effectively avoid the bubble of air curtain layer to enter screw propeller or water pump.For achieving the above object, the method for the utility model employing is:

Position in ships and light boats bottom installation propelling unit, longitudinally arranging one has certain width, vertical dimension and is the reference position from air nozzle lower than air curtain layer, length, smooth surface after the water inlet of screw propeller projected position or waterjet propulsion is as without the bubble smooth surface.This smooth surface is continuous, does not adopt disconnected level mode with each website.Because the bubble of air curtain layer upwards floats under the buoyancy of water effect, and without the ships and light boats base plane of bubble smooth surface lower than this place's air covering, be arranged on without the water inlet of waterjet propulsion on the bubble smooth surface or be arranged on without the screw propeller under bubble smooth surface rear projection face, can not be subject to the impact of bubble.Use single angle of rake ships and light boats, arrange one without the bubble smooth surface, use the ships and light boats of twin screw or multi-thruster, can arrange two or more without the bubble smooth surface.

The utility model is simple in structure, can with simultaneously moulding of hull, increase hardly productive costs, can not produce any fault in use.Be used for flat-bottomed boat or V-type hull, can effectively solve the air curtain layer and in drag reduction, propelling unit be produced dysgenic puzzlement, the air curtain layer of hull bottom ejection is separated hull and water, and can not have influence on the efficient of screw propeller or waterjet propulsion, also make propeller blade avoid coming to harm.

Description of drawings

Fig. 1, the utility model are used for the three-dimensional schematic diagram of single propelling unit V-type hull;

Fig. 2, the utility model are used for the three-dimensional schematic diagram of single propelling unit catamaran hull;

Fig. 3, the utility model be used for the twin screw catamaran hull two to schematic diagram;

Fig. 4, the utility model are used for the three-dimensional schematic diagram of single spraying water propeller V-type hull.

In figure: the 1-hull; 2-air curtain spout; 3-ships and light boats base plane; 4-is without the bubble smooth surface.

The specific embodiment

Below in conjunction with accompanying drawing, the utility model is further described.

As shown in Figure 1-Figure 3, when ships and light boats navigated by water, bubble formed from air curtain spout 2 ejections at different levels the air curtain that covers ships and light boats base plane 3, and ships and light boats base plane 3 and water are separated.Are ships and light boats base plane lower than this place's air covering without air curtain smooth surface 4, bubble can not have influence on the smooth surface of underwater lowest part under the buoyancy of water effect.Bubble can not have influence on the smooth surface of underwater lowest part under buoyancy of water.

As shown in Figure 4, when the V-type hull used the waterjet propulsion mode, what water inlet was later can cancel without the bubble smooth surface.

Claims

1. bottom construction that is used for air curtain drag reduction ships and light boats comprises air curtain spout (2), ships and light boats base plane (3) and without bubble smooth surface (4); It is characterized in that: be that the position of propelling unit is installed bottom ships and light boats without bubble smooth surface (4), longitudinally arrange one and have certain width, vertical dimension and be the reference position from air nozzle lower than air curtain layer, length, the smooth surface after the water inlet of screw propeller projected position or waterjet propulsion.

2. a kind of bottom construction for air curtain drag reduction ships and light boats as claimed in claim 1 is characterized in that: described without bubble smooth surface (4), can arrange one or more according to angle of rake quantity.

3. a kind of bottom construction for air curtain drag reduction ships and light boats as claimed in claim 1 is characterized in that: described without bubble smooth surface (4), when the V-type hull used the waterjet propulsion mode, what water inlet was later can cancel without the bubble smooth surface.