CN203511977U

CN203511977U - Ship stern frame

Info

Publication number: CN203511977U
Application number: CN201320615438.1U
Authority: CN
Inventors: 缪建国; 徐敏; 吴珣亮
Original assignee: NINGBO ORIENTAL SHIP DESIGN INSTITUTE
Current assignee: NINGBO ORIENTAL SHIP DESIGN INSTITUTE
Priority date: 2013-09-30
Filing date: 2013-09-30
Publication date: 2014-04-02
Anticipated expiration: 2023-09-30

Abstract

The utility model discloses a ship stern frame. A ship comprises a stern frame body and a rudder carrier mounted on the stern frame body, and the stern frame body is in a spherical shape. The ship stern frame has the advantages that due to the fact that the tern frame body and the rudder carrier are formed in a separated mode, in the building process of the ship, the stern frame body and the rudder support can be machined at the same time, after the machining of stern frame body and the rudder support is completed, the stern frame body and the rudder support are assembled, the building efficiency of the ship is improved, and the building cycle of the ship is shortened. The connection of the rudder support and the stern frame body is separated obviously, the stern frame body is in the spherical shape, the wake current of water inflow of the front end of a propeller is improved, the water inflow of the propeller is made to be evener and more sufficient, the thrust of the propeller is increased, and the propulsive efficiency of the ship is improved, and the purpose of energy conservation and emission reduction is achieved.

Description

A kind of boats and ships stern post

Technical field

The utility model belongs to shipbuilding technical field, is specifically related to a kind of boats and ships stern post.

Background technology

Screw propeller is applied on most boats and ships as the modal propelling unit of boats and ships, and its scope is very extensive.Along with scientific and technical development, the hydrodynamic performance that people can provide screw propeller has had higher requirement.In recent years, increased the focus that the problems such as the thrust of screw propeller and efficiency and reduction cavity become Hydrodynamic Performance on Propeller research.

Screw blade can be regarded as the wing of a distortion, and along with the increasing of the wing angle of attack, the pressure on wing changes to be increased, and in advance, the whirlpool district area of upper surface of the airfoil constantly strengthens the separation phenomenon of air-flow.When the angle of attack of wing surpasses after angle of stall(ing), this separation phenomenon just rapidly in advance, makes upper surface of the airfoil be full of a large amount of whirlpools, and lift sharply reduces, and resistance increases rapidly until stall.Equally, screw propeller is along with the increase of advance coefficient, and the angle of attack of propeller blade also increases thereupon, and the resistance that propeller blade produces increases thereupon, and the efficiency of whole screw propeller also decreases.Propeller cavitation also increases with the angle of attack in addition, and the appearance of cavitation phenomena will reduce the performance of screw propeller, produces cavitation and degrades, and causes hull pulsating pressure to increase severely.Therefore how to improve thrust and the efficiency of screw propeller and reduce cavitation erosion and carried out deep research both at home and abroad, wherein the non-stationary process of the formation and development of the separated turbine of propeller blade and the control of flowing thereof, be a research topic with most important theories and application value.

Utility model content

The utility model provides a kind of boats and ships stern post, inhomogeneous to solve the propeller influent stream of existing ship, the technical matters that thrust efficiency is lower.

In order to solve above technical matters, the technical scheme that the utility model is taked is:

A boats and ships stern post, described boats and ships comprise stern post and be arranged on the rudder bearer on described stern post, described stern post is hemispherical.

Be preferably, described stern post and rudder bearer divide body formed.

Be preferably, described rudder bearer is welded on described stern post.

After adopting technique scheme, due to stern post and rudder bearer divide body formed, so in the manufacture process of boats and ships, can process stern post and rudder bearer, after stern post and rudder bearer machine, by stern post and rudder bearer assembling simultaneously, thereby improved the manufacture efficiency of boats and ships, shortened the manufacturing cycle of boats and ships.The utility model rudder bearer is connected obviously and separates with stern post, and stern post is hemispherical, has improved the wake of screw propeller front end water inlet, the influent stream of screw propeller more evenly fully, thereby increased the thrust of screw propeller, improved the propulsion coefficient of boats and ships, realized the object of energy-saving and emission-reduction.

Accompanying drawing explanation

In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.

Fig. 1 is the topology view of the utility model boats and ships stern post;

Fig. 2 is the first cutaway view of the utility model boats and ships stern post;

Fig. 3 is the second cutaway view of the utility model boats and ships stern post;

Fig. 4 is the 3rd cutaway view of the utility model boats and ships stern post.

The specific embodiment

For making object, technical scheme and the advantage of the utility model embodiment clearer, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making all other embodiment that obtain under creative work prerequisite, all belong to the scope of the utility model protection.

As shown in Figures 1 to 4, boats and ships comprise stern post 1 and are arranged on the rudder bearer 2 on stern post 1.Wherein on stern post 1, screw propeller (not shown) is installed, stern post 1 is hemispherical, and in the manufacture process of boats and ships, stern post 1 and rudder bearer 2 minutes are body formed, and the mode of rudder bearer 2 by welding is fixed on stern post 1.

Body formed due to stern post 1 and rudder bearer 2 minutes, therefore, in the manufacture process of boats and ships, can process stern post 1 and rudder bearer 2 simultaneously, after stern post 1 and rudder bearer 2 machine, by 2 assemblings of stern post 1 and rudder bearer, thereby improve the manufacture efficiency of boats and ships, shortened the production cycle of boats and ships.

The utility model rudder bearer 2 and stern post 1 minute are body formed, and stern post 1 is hemispherical, so rudder bearer 2 is connected obviously and separates with stern post 1.And stern post 1 is hemispherical, significantly improved the wake of screw propeller front end water inlet, the influent stream of screw propeller is more evenly abundant, thereby has increased the thrust of screw propeller, has improved the propulsion coefficient of boats and ships, has realized the object of energy-saving and emission-reduction.

Finally it should be noted that: above embodiment only illustrates the technical solution of the utility model, is not intended to limit; Although the utility model is had been described in detail with reference to previous embodiment, those of ordinary skill in the art is to be understood that: its technical scheme that still can record aforementioned each embodiment is modified, or part technical characterictic is wherein equal to replacement; And these modifications or replacement do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.

Claims

1. a boats and ships stern post, described boats and ships comprise stern post and are arranged on the rudder bearer on described stern post, it is characterized in that, described stern post is hemispherical.

2. boats and ships stern post according to claim 1, is characterized in that, described stern post and rudder bearer divide body formed.

3. boats and ships stern post according to claim 2, is characterized in that, described rudder bearer is welded on described stern post.