RU201400U1 - Mechanical ship propulsion propeller of a high ice class (Icebreaker 6, 3.5 MW). - Google Patents

Abstract

The design of the Steerprop rudder propeller (Finland) is known, which is remotely correlated in characteristics with the invented VRK, but the invented VRK, in addition to a different layout structure, has significantly better characteristics and, first of all, increased strength, compared to the Steerprop rudder propeller. The invented VRK provides a 15 second 180 ° turn, provides ice breakage up to 1.5 meters thick. Propulsion thrust at full power is approximately 812 kN, with a suction ratio of approximately 0.041. The existing technical characteristics allow, in contrast to propeller-driven propellers of other manufacturers, movement astern even in ice. The invented design of the VRK allows changing the constant streamlines with a more optimal one for icebreaker class ships and reducing the vortex effect when the ship is moving. The invented VRK makes it possible to use high-strength stainless steels with high fatigue-corrosion resistance in the manufacture.

Description

The claimed utility model "Mechanical ship propeller-driven propeller of a pulling type of high ice class (Icebreaker 6, power of 3.5 MW)" (abbreviated - Propeller-driven propeller or VRK) refers to the field of mechanical engineering, to propulsion technological installations, with placement in the stern part of the hull of the end of the ship in the area of the engine room, designed to ensure the movement, turning and braking of icebreaker-type vessels of the IBP07 class.

In the course of the vessel's movement, the propeller-propellers must ensure the speed of movement, the ability to overcome ice fields, within the framework of the specified characteristics, ensure the mobility of the vessel's maneuvering, increased maneuverability of its turn, turn and stop.

The design of the Steerprop rudder propeller (Finland) is known, which is remotely correlated in characteristics with the invented VRK, but the invented VRK, in addition to a different layout structure, has significantly better characteristics and, first of all, increased strength, compared to the Steerprop rudder propeller. The invented VRK provides a 15 second 180 degree turn, provides ice breakage up to 1.5 meters thick. Propulsion thrust at full power is approximately 812 kN, with a suction ratio of approximately 0.041. The existing technical characteristics allow, in contrast to propeller-driven propellers of other manufacturers, movement astern even in ice. The invented design of the VRK allows you to change the constant streamlines, from more optimal for icebreaker class ships, and to reduce the vortex effect when the vessel is moving. The invented VRK makes it possible to use high-strength stainless steels with high fatigue-corrosion resistance in the manufacture.

The rudder propeller includes a propeller with a diameter of 3.5 meters, a nacelle (various configurations are possible) with a planetary gearbox and a magnetic clutch, an increased strength rack, a foundation for attaching the rudder-rudder, a local control and automation system.

Operation of the propeller-propeller column provides for several modes in forward motion, forward movement astern, operating in reverse, mooring mode.

The developed model, due to the optimized layout model, has a number of advantages, even relative to the rudder-propellers of a simpler class.

So the competitive advantages of the invented VRK are:

- a greater adaptation coefficient of the VRK (the possibility of using it on various types of ships);

- a high class of strength of the foundation for fastening the propellers, using an individually designed rotary support;

- the possibility of using the bottom box, which allows the installation of the VRK entirely from above and in units from the bottom, and to place most of the equipment on the VRK;

- design features, namely the placement of the propeller in front of the nacelle, which improves the hydrodynamic characteristics - the streamlining of the propeller-driven propeller, the use of hybrid seals, which completely excludes the ingress of seawater into the propeller structure;

- the use of cast alloyed corrosion-resistant steels, most suitable for low temperatures.

The indicated significant differences of the developed VRK show its novelty and exclusivity in relation to other existing types of rudder-propellers.

Brief description of the drawing (Fig. 1):

1 - Propeller made of high-strength alloyed corrosion-resistant steel;

2 - nacelle of the propellant rocket ship of litho-welded structure from ship's hull cast steel;

3 - Reducers for turning the VRK around its axis;

4 - Magnetic coupling for transferring the torque of the propeller motor shaft or the output shaft of the diesel engine to the input shaft of the propeller-driven propeller;

5 - Rack of increased strength and streamlined shape;

6 - The foundation of the VRK fastening, made of an internal half-coupling (table casting) and stiffeners welded to it;

7 - Local control and automation system, integrated into the general control system of technical means.

Claims (1)

Propeller-propeller (VRK) to ensure the movement of a vessel or surface ship, which is a structure consisting of a propeller made of high-alloy cast steel, a lower angular gearbox in the form of a pair of gears with involute tooth engagement in the body of the VRK nacelle, horizontally passing through bearings inside the propeller shaft nacelle housing, thrust bearing, stern tube device with a shaft seal, vertical shaft mounted on bearings in the shaft (rack) of the propeller shaft, upper gearbox with angular gears of involute engagement inside the upper gearbox housing, the foundation of the propeller shaft installed by welding in the stern of the vessel, slewing ring, azimuth rotation device, intermediate shaft with flexible coupling for connection to the propeller-driven propeller motor, sensor system, hydraulic system, lubrication and water cooling system of propeller-driven propeller, local control and automation system.

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