RU2742846C1 - Vane vehicle water propulsion unit - Google Patents

Abstract

FIELD: machine building.SUBSTANCE: invention relates to transport machine building, namely to floating conveyors, and can be used in development of special hydrodynamic devices improving water transport properties of conveyors. Vane water-propellant propulsor comprises housing and blades mounted thereon. Blades of the wheel can extend in radial direction under centrifugal force at preset number of wheel turns and return to initial position under action of elastic elements.EFFECT: higher thrust of propulsors and higher speed of floating vehicle when moving in water.1 cl, 4 dwg

Description

The invention relates to transport engineering, in particular to floating conveyors, and can be used in the development of special hydrodynamic devices that improve the navigable properties of conveyors.

Known floating craft for equipping armored vehicles, characterized in that it contains two water-permeable side pontoons, filled with lightweight filler and made with the possibility of fixing them on the armored vehicle by means of bow and stern attachment points, a wing to create lift from the incoming water flow and drain it under the bow end armored vehicles, installed between the pontoons, in front of the armored vehicle, with the possibility of fixing it on the inner sides of the pontoons in various positions in height and angle of attack, and the aft inserts fixed on the inner sides of the pontoons, the dimensions of the floating craft are selected from the condition of ensuring the transportation of specified cargoes while ensuring optimal capabilities in hydrodynamics, cross-country ability - the maximum possible entry and exit angles and ground clearance not less than the ground clearance of the armored vehicle, with the choice of the minimum possible width of the floating craft for approaching landing ships, and ensuring unsinkability at full load narrow and flooding of the body of the armored vehicle with water (RF patent for invention No. 2371350, MPK В63В 35/34, B60F 3/00, publ. October 27, 2009).

The disadvantages of this design include the location of the pontoons along the sides of the armored vehicle, which increases its width, which leads to an increase in water resistance, reduces the speed of movement of the armored vehicle afloat, impairs its controllability, and also limits its use when disembarking from a landing craft, since - due to the increase in size, the number of armored vehicles that can be simultaneously taken aboard the landing ship is reduced. The disadvantages of the design also include a considerable time to bring the pontoons into working position and the complexity of choosing the optimal design parameters, taking into account the wing device.

Known amphibious armored tracked vehicle, which includes a body with an amphibious aft hatch and an opening for the passage of troops, a power plant, a tracked propeller with a hydropneumatic suspension and adjustable ground clearance. Foldable displacement tanks are attached to the bow and stern of the hull, the volumes of which are in communication with the internal volume of the hull, made of armor plates, hinged together and the hull, sealed at the joints, and having the ability to fit in the folded position with a special drive on the front and rear parts hull in such a way that the folded sheets of displacement tanks are covered with reinforced armor plates, respectively, the upper frontal sheet and the lower stern sheet. To move in water, the machine is equipped with propellers of the “screw-in-nozzle” type (RF patent for invention №2246682, IPC F41H 7/00, B60F 3/00, publ. 20.04.2004).

The disadvantages of the design include the use of displacement tanks made of armor plates, which increase the weight and length of the tracked vehicle and worsen its handling parameters on the water. In addition, the use of this technical solution to improve the seaworthiness of floating vehicles in service (for example, armored personnel carriers) is impractical due to the high costs of its implementation.

It is known a wheeled floating vehicle containing a chassis with bumpers and a body mounted on a frame, having wings and a front grill, and the front bumper is made in the form of a float having protrusions on top at the end sections in front of the wheels and a ledge under the front grill of the body, and the movement of the vehicle on floating is carried out due to the rotation of the wheels (RF patent for invention №2148500, IPC B60F 3/00, B60R 19/02, publ. 10.05.2000).

The disadvantage of this design is the low efficiency of the propellers, which serve as the wheels of a floating vehicle, which does not allow it to develop high speed.

As the closest analogue, a vane water-propeller of a vehicle is adopted, containing a copier, a body and blades installed on it with a drive for periodically opening and holding the blades in a certain position and a mechanism for returning them to their original position, and the drive contains pushers that move freely in the guides installed on the body, each of which at one end is mated with a copier, and the other is connected to the corresponding blade (Inventor's certificate No. 1082633, IPC B60F 3/00, publ. 03/30/1984).

This design has a significant drawback, which is that the area of the blades is limited by the plane of the wheel, because they must fit on it when the blade passes the upper position, which does not allow increasing the thrust of this propeller, and limits the speed of the vehicle when driving in water. In addition, the blades have a small shoulder relative to the axis of rotation, which further reduces the efficiency of the propeller. Therefore, the use of such a propeller when landing wheeled armored vehicles from a landing craft increases their vulnerability to enemy weapons.

The invention solves the problem of increasing the efficiency of a propeller blade propeller of a vehicle by increasing the thrust force of the propeller, which is a consequence of the lengthening of the blade arm and its rotation speed, which is proportional to the arm length - the radius of rotation.

To solve the problem in the known paddle water propulsion vehicle, containing a body and blades installed on it with the ability to move and hold the blades in a certain position and a mechanism to return them to their original position, it is proposed to make the blades extend radially from the center of the wheel under the action of centrifugal force and returning to their original position under the action of elastic elements.

In the proposed technical solution, when the floating vehicle is in the water and the wheel speed increases to the set value, the blades move radially outside the wheel, while the blades in the upper part of the wheel come out of the water, and by increasing the total area of the blades in the lower part of the wheel and lengthening the arm of the blades, an increase in the efficiency of the propeller is achieved, which increases the speed of the floating vehicle when driving in water.

The accompanying graphics show:

in fig. 1 is a general view of a paddle water-propeller of a vehicle;

in fig. 2 - section a-a in Fig. one;

in fig. 3 - paddle water propeller of a vehicle when a floating vehicle is moving in water;

in fig. 4 - node I in Fig. one.

On graphic materials the following designations are adopted:

1 - blade;

2 - stock;

3 - elastic element;

4 - cylinder;

5 - internal disk;

6 - external drive;

7 - propeller body;

8 - wheel;

9 - body;

WL - waterline.

Description of the design of the propeller blade.

The design of the vane water-propeller of the vehicle contains the body of the propeller 7, consisting of cylinders 4 mounted on the inner disk 5 and the outer disk 6, containing blades 1 fixed on the rods 2. The rods 2 are installed with the possibility of movement inside the cylinders 4 and are equipped with elastic elements 3. The body of the propeller 7 is fixed to the wheel 8 of the vehicle.

Blade water propulsion vehicle works as follows. If it is necessary to overcome a water obstacle at high speed, the body of the propeller 7 is fixed on the wheel 8 of a floating vehicle, such as an armored personnel carrier. When the vehicle is parked or when the vehicle is moving at low speed, the blades 1 are in the initial position (Fig. 1) and do not protrude beyond the wheel 8. This is achieved due to the fact that under the action of elastic elements 3 the rods 2 move inside the cylinders 4. After transition into an aqueous medium and increase the frequency of rotation of the wheels 8, the blades 1 under the action of centrifugal forces move in the radial direction from the center of the wheels 8, overcoming the resistance of the elastic elements 3. In this case, the blades 1 are extended beyond the wheels 8, and in the upper position they leave the water. Due to this, a hydrodynamic force is created on the blades 1 during their movement under water, acting in the direction of movement of the floating vehicle. After the blades 1 emerge from the water, the force acting on them from the air environment is negligible, as a result of which the blades 1, released from the water, do not impede the movement of the floating vehicle.

Thus, the proposed design makes it possible to increase the speed of a floating vehicle when moving in water, which contributes to an increase in the efficiency of its use, for example, when landing troops from a landing craft.

Claims (1)

A vane water-propeller of a vehicle containing a body and blades installed on it with the possibility of moving and holding the blades in a certain position and a mechanism for returning them to their original position, characterized in that the blades of the wheel are made with the possibility of extension in the radial direction under the action of centrifugal force at a given number wheel revolutions and return to its original position under the action of elastic elements.

Images