RU168712U1 - Jet propulsion - Google Patents

Abstract

The utility model relates to shipbuilding, in particular to jet propulsion. The mover includes a water jet path, an impeller mounted on the motor shaft, a nozzle, an air duct installed in the water jet path. The mover is equipped with a mechanism for changing the speed of rotation of the impeller mounted on the motor shaft, and a control unit for air supply synchronously to change the speed of rotation of the impeller. The mover allows you to achieve maximum efficiency over the entire range of impeller revolutions. 2 ill.

Description

The utility model relates to shipbuilding, in particular to jet propulsion.

Known jet propulsion, including a water conduit, a straightening apparatus, a nozzle with openings for supplying exhaust gases, an impeller mounted on the motor shaft. Exhaust gases are fed into the nozzle, mixed with the flow of water and accelerate it. As a result, the speed of the vessel increases (patent No. 93070, publ. 04/20/2010 Bull. No. 11).

A water-jet propulsion was selected as a prototype, including a water-jet path, an impeller mounted on the engine shaft, a nozzle, a compressor, and an air duct. Air is pumped into the water jet by a compressor. Compressed air, mixing with water, accelerates the outgoing water flow, increasing the speed of the vessel (see Kulikov S.V., Khramkin M.F. Water-jet propulsion, L., Shipbuilding, 1980).

In these structures, there is no provision for adjusting the air or gas supply depending on the speed of rotation of the impeller.

The technical result is aimed at expanding the technical capabilities and characteristics of the water jet by providing the ability to control the air supply depending on the speed of rotation of the impeller.

The technical result is achieved in that the water jet propulsion comprises a water jet path, an impeller mounted on the engine shaft, a nozzle, an air duct installed in the water jet path. According to a utility model, the engine is equipped with a mechanism for changing the speed of rotation of the impeller mounted on the motor shaft, and a control unit for supplying air synchronously to changing the speed of rotation of the impeller.

In FIG. 1 shows a jet propulsion with one duct.

In FIG. 2 - water jet propulsion with several air ducts (in

depending on the number of gears).

Air can be supplied to the water canal in two ways.

In FIG. 1 jet propulsion device includes a water jet path 1, an impeller 2 mounted on the shaft 3 of the engine 4, a nozzle 5, an air duct 6 with a valve 7 installed in the water jet tract 1. The device is also equipped with a gearbox 8 mounted on the shaft 3 of the engine 4. The control unit 9 with manual or electronic control is connected to the gear selection lever of the gearbox 8 and the valve 7 of the duct 6.

Works jet propulsion as follows. Water enters the water-jet path 1. In the mode of the first transmission of the gearbox, the impeller 2 rotations are minimal. The valve 7 mounted on the air duct 6 does not allow air to enter the waterway 1. After the engine has set 4 maximum revolutions in the first gear mode, by command (or manually) from the control unit 9, the gearbox 8 is switched to the next gear, while synchronously the valve 7 is activated to supply air to the duct 6. Similarly, the jet propulsion operates in other gears. Next, the mixture of water and air enters the impeller 2 and is thrown out through the nozzle 5 in the direction opposite to the direction of motion of the vessel.

In FIG. 2, the jet propulsion device includes a water jet path 1, an impeller 2 mounted on the shaft 3 of the engine 4, a nozzle 5, air ducts 6, 7, 8, 9 with valves 10, 11, 12, 13 installed in the water jet tract 1. The device is also equipped with a box gear 14 mounted on the shaft 3 of the engine 4. The control unit 15 with manual or electronic control is connected to the gear lever 16 and the valves 10, 11, 12, 13 of the duct 6, 7, 8, 9.

Works jet propulsion as follows. Water enters the water jet tract 1. In the first transmission mode, the impeller rotations 2 are minimal — the valve 10, as well as the valves 11, 12, 13 installed on the air ducts 6, 7, 8, 9 do not allow air to enter the water jet tract 1. After recruitment by the engine 4 maximum revolutions, in the first gear mode, by command (or manually) from the control unit 15, the gearbox 14 is switched to the second gear, while the valve 10 synchronously activates the air supply to the duct 6. After the engine has set 4 maximum revolutions, second mode before chi, operates valve 11 mounted on the duct 7. This duct 6 remains open. After the engine has set 4 maximum revolutions in the third gear mode, the valve 12 is activated to supply air to the duct 8, the ducts 6 and 7 are open. After the engine has set 4 maximum revolutions in the fourth gear mode, the valve 13 is activated to supply air to the duct 9, the ducts 6, 7, 8 are open. Next, the mixture of water and air enters the impeller 2 and is thrown out through the nozzle 5 in the direction opposite to the direction of motion of the vessel.

The water-jet propulsion device made in this way allows achieving maximum efficiency over the entire range of impeller revolutions.

Claims (1)

A water-jet propulsion device comprising a water-jet path, an impeller mounted on a motor shaft, a nozzle, an air duct installed in a water-jet tract, characterized in that the engine is equipped with a rotor speed changing mechanism mounted on the motor shaft and an air supply control unit synchronously with a speed change impeller rotation.

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