Active steering by the courts

devices ship

Active steering by the courts

Types and features of active control of vessels When maneuvering in a restricted area or navigating areas with navigational hazards, the requirements to the maneuverability of the ship substantially increase, while in these conditions the ship’s speed usually decreases and, accordingly, the efficiency of the rudder falls sharply. The ship’s controllability deteriorates with a decrease in speed and in the case of unpleasant weather. To improve the controllability of vessels at low speeds or in the absence of a course, special media are envisaged. (ACS) by the ship. Necessity for. The ACS is decided based on the nature of the character of the operation. of the vessel. ero construct | and so on. n Increased requirements for manageability on small soon. The use of automatic control systems on vessels of the technical fleet: tugboats. crane ships, pipelaying vessels, etc. e. Essential are also economic prerequisites that indicate the expediency of using automatic control systems on vessels, often calling at port 14, for example, on ferries, containerships, passenger ships. The application of the automatic control system allows to reduce the time of the ship stay in the port, to regroup frequently repeated mooring operations. Means of active management are used on vessels with specific modes of navigation: fishing and fishing vessels, research vessels, special vessels. vessels and floating objects intended for the development of the World Ocean of active management include in dynamic dynamical systems, the purpose of which is to keep the floating object in a given place for work without anchoring. The means of active management of vessels are divided into two groups. The first includes ACS functionally combined with the main propulsors or using jet propelled by a propeller. The ACS of this group can perform the functions of the ship’s steering wheel. The second group includes automatic control systems operating independently of the main propulsors of the vessel. These ACS are more effective in the absence of a stroke or in the movement of: 1 vessel at a low speed. The ACS of this rpvmn are usually called thrusters.

The ship with cycloidal propulsion

Turning the guide nozzle

The main ACS of the first group are as follows: 1. The winged propeller, located under the housing den of the body, creates a variable in the direction of the stop. If two wing propellers are installed, the vessel is able to hold on to the ground, move by the laom, perform various maneuvers at low speeds . The rotary guidance nozzle provides control of the vessel due to the reaction, which arises when the direction of the jet rejected by the propeller is changed, the pressure is redistributed on the surface of the transferred The installation of two rotary nozzles, each of which can be moved independently of the other, provides the ship not only high controllability, but also the possibility of moving with lag 3. The rotary screw column is a propeller in the nozzle whose direction of thrust can vary in any range due to the rotation of the whole device relative to the vertical axis This type of automatic control system provides the ship with good controllability in all modes of operation. The installation of two columns allows the vessel to travel with a lag

Retractable screw column

Thrusters with fixed pitch propellers and counter-rotating

The second-generation secondary ACS is as follows. The active steering wheel is an ordinary rectangular contour, an auxiliary propeller is placed in the region of the trailing edge of the wheel. Direction with this screw, changes when the stop is shifted, the hive, which allows the ship to maneuver, even if there is no turn, the auxiliary screw drive is in special gear in the steering wheel, and power is supplied to it through an empty, tight baller. The propeller propeller usually places the nozzle, which increases its efficiency and reduces the likelihood of damage. Being a sufficiently effective tool, active rudders were not widely used, due to the complication of the design of the pen and the baller and insufficient reliability. 2. The device with a wing propeller is used on large vessels with winged propulsion. The telescope can be placed in the extremities without significant changes in the shape of the body. The drawbacks of this device include the low reliability associated with the protruding Tbb below the plane of the bottom of the blade of the propeller 3. The retractable viith columns, unlike the active helm, are raised in a special shaft in the hull of the vessel, in order to create an additional ro resistive. ship. Rotating around the vertical axis by 360 °, the link allows you to receive traction in any direction, not at. running to the drive motor reverser. The column has small dimensions and can be installed as a separate modular IX unit in any area of ​​the vessel. Since in the working position the helical column, as a rule, protrudes beyond the ra- bars of the ship’s hull, it should be taken into account that in this case it is less bristled with damage to a lesser extent. 4. Tunnel-type thrusters have now become most widespread. To create an abutment, propellers, winged propellers and water cannons are used in them. Let us consider the design of the rudder device with the screw of the reinforced pitch (Figure 9.6). The propeller is located in the rectilinear channel on ro | The share in which there is also a mechanism for shifting the blades. The screw drive is located on the platform. At a constant speed of rotation, by changing the pitch rpeGoro of the screw, a smooth peri – lation of the thrust from zero to maximum of the thrusters is applied, also the screws of the x – tined step are applied. The thrust and its direction are changed by a drive. In Table. 9.2 shows the characteristics of domestic thrusters with screws.

Thruster with horizontal placement of the water intake

The second-generation secondary ACS is as follows. The active steering wheel is an ordinary rectangular contour, an auxiliary propeller is placed in the region of the trailing edge of the wheel. Direction with this screw, changes when the stop is shifted, the hive, which allows the ship to maneuver, even if there is no turn, the auxiliary screw drive is in special gear in the steering wheel, and power is supplied to it through an empty, tight baller. The propeller propeller usually places the nozzle, which increases its efficiency and reduces the likelihood of damage. Being a sufficiently effective tool, active rudders were not widely used, due to the complication of the design of the pen and the baller and insufficient reliability. 2. The device with a wing propeller is used on large vessels with winged propulsion. The telescope can be placed in the extremities without significant changes in the shape of the body. The drawbacks of this device include the low reliability associated with the protruding Tbb below the plane of the bottom of the blade of the propeller 3. The retractable viith columns (Figure 9.5), unlike the active helm, are raised in a special shaft in the hull of the vessel, in order to create an additional ro resistive. ship. Rotating around the vertical axis by 360 °, the link allows you to receive traction in any direction, not at. running to the drive motor reverser. The column has small dimensions and can be installed as a separate modular IX unit in any area of ​​the vessel. Since in the working position the helical column, as a rule, protrudes beyond the ra- bars of the ship’s hull, it should be taken into account that in this case it is less bristled with damage to a lesser extent. 4. Tunnel-type thrusters have now become most widespread. To create an abutment, propellers, winged propellers and water cannons are used in them. Let us consider the design of the rudder device with the screw of the reinforced pitch . The propeller is located in the rectilinear channel on ro | The share in which there is also a mechanism for shifting the blades. The screw drive is located on the platform. At a constant speed of rotation, by changing the pitch rpeGoro of the screw, a smooth peri – lation of the thrust from zero to maximum of the thrusters is applied, also the screws of the x – tined step are applied. The thrust and its direction are changed by a drive. In Table. shows the characteristics of domestic thrusters with screws.

0

Publication author

offline 6 days

Stephen Kevidas

2
Comments: 1Publics: 60Registration: 26-05-2018
Authorization
*
*
Registration
*
*
*
A password has not been entered
*
Password generation
49024706