RU221944U1 - Arctic amphibious vehicle with rotary propeller propulsion - Google Patents

Abstract

The utility model relates to the field of shipbuilding and concerns the design and creation of Arctic amphibious vehicles with rotary-screw propulsors (RPP) for movement on water and on the surface of ice cover, ensuring the exit of the amphibious vehicle from the water to the ice surface. The hull of the Arctic amphibious vehicle is made in the form of a smoothed bow end of an icebreaker with a small bow angle from 20° to 30° and large frame angles from 65° to 80°. The hull has through tunnels, completely open from the bow and stern, on the sides the rotor-screw propulsors are closed by a sponson, and between the rotary-screw propulsors there is an additional volume to ensure buoyancy on the water. The rotor-screw propulsion unit is fixed in the bow and stern bearing supports, which in turn are mounted on three brackets attached to the hull. The technical result consists in the large cargo and passenger capacity of the amphibious vehicle, which ensures efficient movement in water, in water filled with ice and ice debris, on the surface of the ice cover with hummocky ice formations, and also allows you to exit from the water onto the ice by improving the propulsion on clean water, in water with ice, on an ice surface with hummocks and to ensure exit from the water onto the ice by running.

Description

The utility model relates to the field of shipbuilding and concerns the design and creation of Arctic amphibious vehicles with rotary-screw propulsors for movement on water, on water with ice fragments, on the surface of ice cover, ensuring the exit of the amphibious vehicle from the water to the ice surface.

To ensure rescue operations and deliver cargo in hard-to-reach places, a variety of amphibious vehicles are used.

There is a known patent RU 2630871 for a closed-type lifeboat for the evacuation and rescue of personnel on offshore oil and gas platforms, transport and technological vessels in ice conditions. A closed-type lifeboat, the bow end of the hull has two stems spaced apart from each other, interconnected in the upper part of the hull along a curved generatrix and inclined forward in the direction from bottom to top, and in the lower part - with the bottom surface of the boat with a formation in the front part its hull is recessed, the propulsion complex is made in the form of side-mounted rotary-screw propulsors, the fire protection system is a system of nozzles distributed along the perimeter of the outer surface of the boat to form a protective gas thermally insulating curtain, which are connected by a line to a source of increased pressure of inert gas located in the hull of the boat .

Known patent RU 2648620 for a closed-type lifeboat for the evacuation and rescue of personnel at offshore facilities in ice conditions. A closed-type lifeboat for the evacuation and rescue of personnel from offshore facilities in ice conditions, containing a hull, a propulsion system, including boats located in the hull, side-mounted high-pressure gas cylinders and jet nozzles-propulsors connected to them through controlled valves, the cylinders high-pressure gas are placed in protective containers and installed with the possibility of their dismantling, and the jet nozzles-propulsors are attached directly to the housings of the high-pressure gas cylinders. At the same time, the propulsion system of the lifeboat is supplemented with a propulsion device in the form of a folding rotary steering column with a power drive.

Known patent RU 2651960 for a rescue device for evacuating personnel of offshore oil and gas structures in ice conditions. A rescue device for evacuating personnel of offshore oil and gas structures in ice conditions, containing a launching platform with a lifeboat installed on it, as well as a floating module placed in a protective housing attached to the offshore oil and gas structure, on which the launching platform is installed. The floating module consists of upper and lower pontoons connected to each other by means of supporting columns. The upper pontoon is sealed, and the lower pontoon has a ballast system. The launching platform is designed to accommodate more than one lifeboat. The rescue device is equipped with retractable ramps for launching boats. An opening is formed in the wall of the protective housing for retractable ramps and lifeboats.

However, in order to carry out the industrial development of the regions of the Far North and the development of Arctic oil and gas condensate fields, modern amphibious vehicles with increased cargo and passenger capacity are required, designed to perform rescue operations, transport goods in Arctic conditions, including work in clean water, in water with ice debris, movement on flat ice and on the ice surface with hummocks, independent exit from the water to the edge of the ice cover.

The objective of the proposed technical solution is to develop an Arctic amphibious vehicle with rotary propeller propulsion (RPP) with large cargo and passenger capacity, ensuring efficient movement in water, in water filled with ice and ice debris, on the surface of ice with hummocky ice formations, as well as allowing you to exit the water onto the ice.

To solve this problem, an Arctic amphibious vehicle with rotary-screw propulsors, having a (waterproof) hull with side-mounted rotary-screw propulsors (allowing movement on water), according to the claimed front part of the hull is made in the form of a smoothed bow end of an icebreaker with a stem inclination angle of 20 ° up to 30° and with large camber angles of the frames from 65° to 80° (to improve the propulsion of the amphibious vehicle in clear water, in water with ice, on an ice surface with hummocks and to ensure its exit from the water onto ice up to 25 cm high by raid).

In embodiments of the amphibious vehicle for installing rotary-screw propulsors (and improving their thrust), the hull has through tunnels that are completely open from the bow and stern parts; on the sides, the rotary-screw propulsors are closed by a sponson.

The hull of the amphibious vehicle between the rotary-screw propulsors has an additional volume (to ensure buoyancy on the water, increase displacement, and, accordingly, cargo capacity).

The rotary-screw propulsion unit of the amphibious vehicle is fixed in the bow and stern bearing supports, which in turn are mounted on three brackets attached to the hull (the brackets additionally act as ice protection elements from the impact of large ice fragments on the bow (stern) end of the RVD and thereby prevent its damage and reduce the level of ice torque on the high-pressure motor and its engine, which increases its operating efficiency).

In fig. 1 - general view of the hull of the Arctic amphibious vehicle,

what the heck. 2 - side view of an Arctic amphibious vehicle;

in fig. 3 - front view of the Arctic amphibious vehicle.

The figures indicate: 1 - body; 2 - RVD; 3 - nasal extremity of the body; 4 - cylindrical part of the body (insert); 5 - through tunnels for installing high pressure hoses; 6 - bearing support; 7 - volume of buoyancy on water; 8 - angle of inclination of the hull stem; 9 - camber angle of the hull frames; 10 - body sponson; 11 - brackets.

The Arctic amphibious vehicle includes a body 1 with side-mounted rotary-screw propulsors 2, the bow end 3 of the body smoothly passes into its cylindrical insert 4.

When operating in water, the thrust of the RVD is formed by the pressure distribution on the turns of its helix, therefore, to improve the traction characteristics of the RVD as part of the hull and the propulsion of the amphibious vehicle, the RVD 2 is installed on the bow and stern bearing supports 6 in through tunnels 5 in the housing 1, which are completely open from the bow and stern parts of the amphibious vehicle, which ensures free flow around the turns of the helical line of the RVD and increases the thrust, and also reduces the loss of thrust from the interaction of the RVD with the hull 1. The draft of the hull 1 of the Arctic amphibious vehicle is increased to the level at which the RVD 2 is completely immersed in water, which increases the displacement and makes it possible to increase the cargo passenger capacity; for this purpose, between the hose 2 the hull has an additional volume 7. The contours of the bow end 3 of the hull 1 have an icebreaker shape with an angle of inclination 8 of the stem 22° and with camber angles 9 of the frames 73°, which improves the propulsion of the amphibious vehicle when moving in clear water, in water with packed ice, on the surface of ice with hummocks, and also ensures that the amphibious vehicle reaches the surface of the ice from the water in the raid mode. The sides of the hose are closed by the hull sponson 10, which is an element of protection of the hose from damage during a side impact on the ship's hull during mooring or during lateral interaction with a large piece of ice.

The bow and stern support-bearings 6 of the rotor-screw propulsion unit are, in turn, mounted on three brackets 11 attached to the body 1. These brackets additionally act as ice protection elements from the impact of large ice fragments on the bow (stern) end of the RVD 2 and thereby prevent its damage and reduce the level of ice torque on the high-pressure motor and its engine, which increases the efficiency of its operation.

The Arctic amphibious vehicle works as follows.

When moving afloat in clear water and in ice conditions, the hull is flown around by water and water with ice fragments. Reducing the angle 8 of the stem and the smooth transition of the bow end 3 into the cylindrical part 4 of the hull 1 reduce its towing resistance and improve the propulsion of the Arctic amphibious vehicle in the specified conditions. When operating in water or in water with ice debris, the water flow flows onto the rotating hose 2 through the open inlet of the tunnel 5, which ensures uniform flow around the nose of the hose and increases its thrust and thrust. When operating in water with large ice fragments, the latter rest against the brackets 11 and do not interact with the bow of the RVD, which prevents damage to it, reduces the ice torque on the RVD engine and increases its performance. To reach the ice surface, the amphibious vehicle accelerates through the water and runs into the edge of the ice field; after the bow tip 3 contacts the ice edge in the stem area, the amphibious vehicle moves under the influence of inertial forces that exceed the resistance force from ice destruction. The necessary reduction in the resistance force from ice destruction is ensured by the icebreaking shape of the bow with a small angle of inclination of the stem 8 of 22° and large camber angles of the frames 9 of 73° (Fig. 2, 3). After the helical surface of the hose drive engages the ice edge, the arctic amphibious vehicle exits due to the thrust from the impact of the hose drive into the ice.

When moving on an ice surface with hummocks, the bow part 3 of the Arctic amphibious vehicle runs over the hummock, and the bow part is affected by the ice force of resistance to movement from ice fragments in the hummock. The value of the indicated ice force is reduced due to the proposed shape of the bow tip to a level that allows the Arctic amphibious vehicle to overcome hummocky formations due to the pulling ice force from cutting the hose into the ice.

Thus, an Arctic amphibious vehicle with rotary-screw propulsion provides large cargo and passenger capacity, efficient movement in water, in water filled with ice and ice debris, on the surface of ice with hummocky ice formations, and also allows exit from water onto ice .

Claims (4)

1. Arctic amphibious vehicle with rotary-screw propulsors, having a hull with side-mounted rotary-screw propulsors, characterized in that the front part of the hull is made in the form of a smoothed bow end of an icebreaker with a small angle of inclination of the stem from 20° to 30° and with large angles frame camber from 65° to 80°. 2. An Arctic amphibious vehicle with rotary-screw propulsors according to claim 1, characterized in that for the installation of rotary-screw propulsors, the hull has through tunnels open on the bow and stern sides; on the sides, the rotary-screw propulsors are closed with a sponson. 3. Arctic amphibious vehicle with rotary-screw propulsors according to claim 1, characterized in that the hull between the rotary-screw propulsors has an additional volume of buoyancy on the water. 4. Arctic amphibious vehicle with rotary-screw propulsors according to claim 1, characterized in that the rotary-screw propulsion is fixed in the bow and stern bearing supports, which are mounted on brackets attached to the hull.