CN210116621U

CN210116621U - Rotatable formula anti-sway device

Info

Publication number: CN210116621U
Application number: CN201920748935.6U
Authority: CN
Inventors: 王维; 余建星
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2019-05-23
Filing date: 2019-05-23
Publication date: 2020-02-28
Anticipated expiration: 2029-05-23

Abstract

The utility model provides a rotatable formula anti-sway device, including outer axle, interior axle and anti-sway board, outer axle and interior axle are connected through the bracing piece, are provided with the external gear respectively at outer both ends of axle, and drive gear in being provided with respectively at the both ends of interior axle, through drive chain between the external gear of homonymy and the interior drive gear, through drive gear's rotation in the drive, and then it is rotatory to drive the external gear and anti-sway board. The utility model discloses can guarantee the anti-rolling effect under the various navigational speed, can compromise various sea conditions simultaneously, both guarantee the anti-rolling effect under abominable sea condition, can keep lower resistance in comparatively calm sea condition again.

Description

Rotatable formula anti-sway device

Technical Field

The utility model relates to a novel anti-rolling equipment of rotatable formula.

Background

Wave resistance of a ship refers to the ability of the ship to sail under wind and wave sea conditions. The wave resistance of a ship has an important influence on the navigation of the ship, on one hand, the ship may overturn due to cargo movement caused by rolling, and on the other hand, a series of phenomena such as slamming, wave rising, splashing, propeller stalling and the like may occur to the ship due to the actions of pitching and heaving motions, so that the navigation performance of the ship is influenced.

Roll damping has a great influence on the rolling of ships, the traditional fin stabilizer cannot work effectively at zero navigational speed and low navigational speed, and although the fin stabilizer at zero navigational speed solves the problem, the fin stabilizer needs high power and is expensive in manufacturing cost, and is mainly suitable for high-value ships such as military ships at present. The anti-rolling water tank occupies too high tank capacity, the traditional bilge keels do not occupy the tank capacity and are low in manufacturing cost, but are limited by the shape of the ship, and the width of the bilge keels does not exceed the range of a half-width line and a base line of the ship, so that the anti-rolling effect of the bilge keels at high speed is limited.

The defects of the prior art are as follows:

(1) the novel stabilizer fin has high manufacturing cost and is easy to wear. For example, the prior art with the patent number CN108860500A 'a novel ship fin stabilizer'

(2) The airbag is adopted for stabilizing, so that the occupied cabin volume is higher. For example, the prior art with the patent number CN109229296A 'a controllable airbag stabilizing device and a stabilizing method thereof'

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present invention is to provide a rotatable novel stabilizer at the bilge of the ship. The utility model provides an equipment can guarantee the stabilizing effect under various navigational speed, can compromise various sea conditions simultaneously, has both guaranteed the stabilizing effect under abominable sea conditions, can keep lower resistance again in comparatively calm sea conditions, realizes the unity of economic nature and security. In order to achieve the purpose, the utility model adopts the following technical proposal:

a rotatable anti-rolling device comprises an outer shaft, an inner shaft and an anti-rolling plate and is characterized in that the outer shaft and the inner shaft are connected through a supporting rod, outer gears are arranged at two ends of the outer shaft respectively, inner transmission gears are arranged at two ends of the inner shaft respectively, and the outer gears and the inner transmission gears at the same side are driven to rotate through a transmission chain and then drive the outer gears and the anti-rolling plate to rotate.

Preferably, the anti-rolling plate is designed into a radian according to the shape of the bilge of the ship body, so that the anti-rolling plate is ensured to be attached to the bilge of the ship body when being folded. The distance between every group of outer shafts is 1.5-2 m.

The utility model provides an effective and economically reduce device that hull was rolled, it has following advantage to compare current technique:

(1) the utility model discloses a stabilizer of laminating bilge portion radian can reduce the resistance that the appendage brought in the boats and ships navigation as far as possible under the quiet sea condition, improves navigation economy.

(2) The utility model discloses broken through the shape restriction of stabilizer plate when boats and ships stop, improved the effect of stabilizer.

(3) The utility model discloses controlling means and stabilizer separation only need set up waterproof controlling means at the bracing piece end, have guaranteed entire system's leakproofness and economic nature.

(5) The utility model discloses set up many drive chains in the ship, even there is a small number to take place to damage, rely on other transmissions still to make the effective operation of anti-rolling equipment, improved the reliability of anti-rolling equipment.

Drawings

Figure 1 is a partial view of the roll reduction apparatus of the present invention;

FIG. 2 is a schematic view of the structure under different sea conditions;

fig. 3 is a flow chart of the system controlling the anti-roll device.

The reference numbers in the figures illustrate:

1, a shake reducing plate; 2, an outer shaft; 3, an external gear; 4, a transmission chain; 5, supporting the rod; 6, an inner shaft; 7, a power device; 8 control system 9 internal transmission gear

Detailed Description

The present invention will be described in detail with reference to the accompanying drawings and examples.

As shown in fig. 1, the utility model discloses a roll reducing equipment, including three groups of roll reducing mechanism, a set of roll reducing mechanism includes outer axle 2, epaxial connection roll reducing plate 1 and bracing piece 5. The other end of the support rod 5 is connected with the inner shaft 6. The outer gear 3 is installed at both ends of the outer shaft 2, the inner transmission gear 9 is installed on the inner shaft 6, and the outer gear 3 and the inner transmission gear 9 are connected through the transmission chain 4. The control system 8 controls the power 7 to work according to the instruction, and can drive the inner transmission gear 9 to rotate, so as to drive the outer gear 3 and the damping plate 1 to rotate.

As shown in figure 1, the rocker reducing plate 1 is designed into a radian according to the shape of the bilge of the ship body, so that the bilge is attached to the ship body. The width of the arc rocker panel 1 is designed according to the ship type and does not exceed 600 mm. Each outer axle 2 is connected with 2 bracing pieces 5, and the distance between every bracing piece 5 is 3 ~ 4 m.

The anti-rolling equipment is characterized in that 3 groups of anti-rolling devices are arranged in the middle of a ship body from 1/3 to 1/4, the distance between every two groups of outer shafts 3 is 1.5-2 m, the longitudinal end parts of the anti-rolling devices are finished near a rigid component of the ship body, the anti-rolling plates 1 of the anti-rolling devices in the middle group are wider, and the other two groups are narrower, so that stress concentration caused by sudden change of the structure is reduced. The equipment is arranged at the bilge part of the ship body, can occupy the capacity of some bottom side cabins, and has little influence on the capacity of the main cargo hold.

The implementation process of the telescopic novel stabilization equipment for stabilization under various sea conditions is described in the following with the accompanying drawings:

as shown in fig. 3, the working flow of the telescopic stabilizer is as follows: the crew inputs sea state information into the control system 6, and the most economical rotation angle of the damping plate 1 under the sea state is deduced through motion numerical simulation or water tank model test.

As shown in fig. 2, the anti-sway plate 1 is tightly attached to the ship side under a calm sea condition when in docking, or docking, so that the sailing resistance can be reduced to the maximum extent. Along with the increase of the requirement of sea condition severe anti-rolling, the control system 8 sends a command signal to the power device 7 to control the inner transmission gear 9 to rotate so as to drive the outer gear 3 and the anti-rolling plate 1 to rotate for a certain angle, the ship rolling damping coefficient is increased like a bilge keel, the rolling period is further increased, the equivalent linear damping can be calculated by adopting a Nigule Yeff formula, and when the zero-navigational-speed anti-rolling plate 1 is completely attached, the formula for calculating the dimensionless damping coefficient is as follows:

in the formula: l, B, H, D is the length, width, depth and displacement of ship; k is a radical of₁Is an empirical coefficient, and generally takes k for a marine vessel₁＝0.055～0.060；Φ_AThe average roll amplitude is 0.5-0.6 rad.

Although the preferred embodiments of the present invention have been described with reference to the accompanying drawings, the present invention is not limited to the above-mentioned embodiments, which are only illustrative and not restrictive, and those skilled in the art can make many forms without departing from the spirit and scope of the present invention.

Claims

1. A rotatable anti-rolling device comprises an outer shaft, an inner shaft and an anti-rolling plate and is characterized in that the outer shaft and the inner shaft are connected through a supporting rod, outer gears are arranged at two ends of the outer shaft respectively, inner transmission gears are arranged at two ends of the inner shaft respectively, and the outer gears and the inner transmission gears at the same side are driven to rotate through a transmission chain and then drive the outer gears and the anti-rolling plate to rotate.

2. A stabilizer according to claim 1, characterized in that the stabilizer is curved according to the shape of the bilge of the hull to ensure that it fits the bilge of the hull when stowed.

3. A stabilizer according to claim 1, characterized in that the distance between each set of outer shafts is 1.5-2 m.