CN108773469B - water jet propulsion rudderless drag reduction ship - Google Patents

Abstract

The invention relates to a water jet propulsion rudderless drag reduction ship, which comprises a ship body (1), a propulsion device and a power device. The ship body (1) is propelled by the centrifugal pump (3) through water spraying, so that the application range of the centrifugal pump (3) is expanded; the resistance of the ship body (1) is reduced by the structure of the inclined surface of the water inlet (7a) on the suction pipe (7) in cooperation with the application of the Bernoulli principle; the ship body (1) is not provided with a rudder, but can still be steered, and the resistance is reduced; the damage to aquatic organisms is greatly reduced by water spraying propulsion; a filter screen and a scraper are arranged on a water inlet (7a) of the water suction pipe (7), floating objects adsorbed on the filter screen can be scraped off by the scraper in time, and the centrifugal pump (3) is reliable in operation and long in service life; the propulsion device not only has simple structure, but also has a plurality of functions of propulsion, drag reduction, steering, aquatic organism protection and the like, and has reasonable design, compact structure and best use of things; the invention can also be transplanted to submarine, torpedo, underwater missile and deep sea detecting device, and has wide application prospect.

Description

water jet propulsion rudderless drag reduction ship

technical field

The invention relates to a water-jet propulsion rudderless drag-reducing ship, in particular to a water-jet propulsion rudderless drag-reducing ship with small sailing resistance and no rudder.

Background technique

Ships have been in existence for thousands of years, from manpower to mechanical drive, and the streamlined structure of the bow is a huge technological progress.

Whether modern ships can further reduce the resistance of water remains to be explored.

The use of the rudder, although it can turn the hull, increases the resistance and needs to be improved.

Modern ships, especially large ships, are propelled by propellers, and most aquatic creatures will be shattered when they encounter the propeller, which is extremely inconsistent with the protection of the ecological environment advocated by modern civilization, and needs to be innovated.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a water-jet propulsion rudderless drag-reducing ship with small sailing resistance and no rudder.

For solving the above-mentioned technical problems, the technical scheme of the present invention is:

A water-jet propulsion rudderless drag-reducing ship includes a hull, a propulsion device and a power device.

The power plant is either an electric motor, or a gasoline engine, or a diesel engine, or a steam engine, or a steam turbine, or a gas turbine, or a nuclear device, or a combined device.

There is no rudder on this hull.

The propulsion device is a well-known public centrifugal pump; the centrifugal pump is composed of a pump casing, an impeller, a pump shaft, a water suction pipe and a water pressure pipe as a whole.

Two centrifugal pumps are respectively installed at the rear end of one of the hulls on both sides of the bow side of the hull. Regardless of whether the hull is loaded or not, these two centrifugal pumps are located below the surface of the water on which the hull floats; the pump shaft on the centrifugal pump does not extend. The outer lateral surface of the pump casing on the outlet side and the inner lateral surface of the ship hull at the corresponding position are connected together in a tight fit manner.

The rear end of the suction pipe of each centrifugal pump vertically penetrates the hull of the hull at the corresponding position in a tight-fitting manner. ; The water suction pipe extending forward, its axis is horizontal, it is gradually flattened in the vertical direction from the back to the front, and it is connected with the hull of the corresponding position in a tight fitting manner at the contact point, and its water inlet is a vertical inclined surface, and the The angle between the inclined plane and the hull at the corresponding position is less than 90°.

The pressurized water pipe of each centrifugal pump is a circular pipe, which is inclined outward and backward through the hull of the hull at the corresponding position in a tight fit; the pressurized water pipe located outside the hull is close to the hull at the corresponding position The outer lateral surface of the hull is horizontally protruded backward, and it is connected with the hull of the corresponding position in a tight fitting manner at the contact point, and its water spout is a round surface.

The pump shaft on each centrifugal pump passes through the pump casing inside the centrifugal pump and protrudes toward the middle of the hull.

The impeller mounted on the pump shaft on each centrifugal pump is either single-stage or multi-stage.

The power units respectively provide power for the rotation of the pump shaft on one of the two centrifugal pumps.

When the power unit drives the pump shaft on the centrifugal pump to rotate, the pump shaft drives the impeller on it to rotate synchronously, and the water outside the hull flows into the centrifugal pump along the outer side of the hull on the bow side of the hull on the same side of the centrifugal pump. The suction pipe on the pump, after being accelerated by the impeller, is ejected from the pressure water pipe of the centrifugal pump at a high speed, and the reaction force of the jetted water causes the hull to overcome the resistance to advance or accelerate; In the process of water pressing into the suction pipe, the relative velocity of these waters increases, and most of these waters flow through the outer lateral surface of the bow side hull on the same side. According to Bernoulli's principle, the pressure of these waters decreases, Therefore, the resistance to the hull is reduced; when the powers of the two centrifugal pumps on the hull are equal, the hull advances in a straight line, and when the powers of the two centrifugal pumps are not equal, the hull's heading power is smaller than that of the centrifugal pump. The hull is steered on one side, so that it can be steered without a rudder on the hull; there is no rudder on the hull, and its resistance is further reduced.

In order to make the centrifugal pump work normally, the water inlet of the suction pipe on the centrifugal pump is covered with a filter screen and a scraper that can reciprocate along the filter screen, and the scraper will scrape off the floating objects adsorbed on the filter screen in time.

After adopting this structure, the reaction force of the high-speed water jet from the upper pressure water pipe of the centrifugal pump makes the hull advance or accelerate against the resistance, and the centrifugal pump becomes a propulsion device, which expands the application range of the centrifugal pump. Centrifugal pumps are used for propulsion, which is one of the important innovations of the present invention.

After adopting such a structure, since the angle between the inclined surface of the water inlet of the suction pipe and the hull at the corresponding position is less than 90°, most of the water entering the suction pipe flows through the outer side of the hull on the same side of the bow side, and flows through the bow side. The relative velocity of these waters on the outside of the hull increases, and according to Bernoulli's principle, the pressure of these waters decreases, and thus the resistance to the hull decreases. The structure of the inclined surface of the water inlet cooperates with the application of Bernoulli's principle to reduce the resistance of the hull, which is the second important innovation of the present invention.

After adopting such a structure, when the powers of the two centrifugal pumps on the hull are equal, the hull advances in a straight line, and when the powers of the two centrifugal pumps are not equal, the bow of the hull turns to the side of the centrifugal pump with the lower power, thus There is no rudder on the hull. There is no rudder on the hull, and the drag is further reduced. Although there is no rudder on the hull, it can still steer and reduce the resistance, which is the third important innovation of the present invention.

After adopting such a structure, the hull adopts water jet propulsion, which greatly reduces the fatal harm to aquatic organisms, which is much better than propeller propulsion.

After adopting such a structure, since the water inlet of the suction pipe on the centrifugal pump is covered with a filter screen and a scraper that can reciprocate along the filter screen, the floating objects adsorbed on the filter screen can be scraped off in time by the scraper, similar to a car. The wiper on the windshield wipes off the rainwater on the windshield in time, so the centrifugal pump works reliably and has a long service life.

After adopting such a structure, not only the propulsion device has a simple structure, but also has multiple functions such as propulsion, drag reduction, steering and protection of aquatic organisms.

After adopting such a structure, the present invention can also be transplanted to submarines, torpedoes, underwater missiles and deep-sea detectors, and has broad application prospects.

Description of drawings

The specific embodiments of the present invention will be described in further detail below with reference to the accompanying drawings.

Figure 1 is a schematic diagram of the installation of two centrifugal pumps on the hull.

Detailed ways

As shown in Figure 1, a water-jet propulsion rudderless drag reduction ship includes a hull 1, a propulsion device and a power device.

The power plant is either an electric motor, or a gasoline engine, or a diesel engine, or a steam engine, or a steam turbine, or a gas turbine, or a nuclear device, or a combined device.

There is no rudder on this hull 1 .

As shown in FIG. 1 , the propulsion device is a known public centrifugal pump 3 . The centrifugal pump 3 is composed of a pump casing 4 , an impeller 5 , a pump shaft 6 , a water suction pipe 7 and a water pressure pipe 8 as a whole.

As shown in FIG. 1 , two centrifugal pumps 3 are respectively installed at the rear end of one of the hulls on both sides of the bow side 2 on the hull 1 , regardless of whether the hull 1 is loaded or not, the two centrifugal pumps 3 are located at the position of the hull 1 . Below the floating surface; the outer lateral surface of the pump casing 4 on the side where the pump shaft 6 does not protrude on the centrifugal pump 3 is connected with the inner lateral surface of the ship hull at the corresponding position in a tight fit.

As shown in FIG. 1 , the rear end of the suction pipe 7 of each centrifugal pump 3 vertically penetrates the hull of the hull 1 at the corresponding position in a tight fit manner, and after passing through the hull, it bends forward and is in close contact with the hull. The outside of the hull protrudes forward. The forward-protruding water suction pipe 7 has a horizontal axis, and is gradually flattened in the vertical direction from back to front, and is connected with the hull at the corresponding position in a tight-fitting manner, and its water inlet 7a is a vertical inclined plane, and The angle between the inclined plane and the hull at the corresponding position is less than 90°.

As shown in FIG. 1 , the pressurized water pipe 8 of each centrifugal pump 3 is a circular pipe, which inclines and passes through the hull of the hull 1 at the corresponding position in a tight fitting manner in an outward and rearward direction. The pressurized water pipe 8 located outside the hull, which is close to the outer lateral surface of the hull of the hull 1 at the corresponding position, protrudes horizontally backward, and is connected with the hull at the corresponding position in a tight fit manner, and its spray The nozzle 8a is a circular surface.

As shown in FIG. 1 , the pump shaft 6 on each centrifugal pump 3 passes through the pump casing 4 inside the centrifugal pump 3 and protrudes toward the middle of the hull 1 .

As shown in FIG. 1 , the impeller 5 mounted on the pump shaft 6 on each centrifugal pump 3 is either a single-stage type or a multi-stage type.

As shown in FIG. 1 , the power devices respectively provide power for the rotation of the pump shaft 6 on one of the two centrifugal pumps 3 .

As shown in FIG. 1 , when the power device drives the pump shaft 6 on the centrifugal pump 3 to rotate, the pump shaft 6 drives the impeller 5 on it to rotate synchronously, and the water outside the hull 1 runs along the hull 1 on the same side of the centrifugal pump 3 . The outer side of the hull on the bow side 2 flows into the suction pipe 7 on the centrifugal pump 3. After the impeller 5 accelerates it, it is ejected from the pressure water pipe 8 of the centrifugal pump 3 at a high speed. The reaction force of the ejected water flow makes the water flow. The hull 1 advances or accelerates against resistance. When the atmospheric pressure presses the water in front of the same side of the centrifugal pump 3 into the suction pipe 7, the relative velocity of these waters increases, and most of these waters flow through the outer lateral surface of the bow side 2 hull on the same side , according to Bernoulli's principle, the pressure of these waters decreases, and thus the resistance to said hull 1 decreases. When the power of the two centrifugal pumps 3 on the hull 1 is equal, the hull 1 moves forward in a straight line, and when the power of the two centrifugal pumps 3 is not equal, the bow of the hull 1 turns to the side of the centrifugal pump 3 with the lower power, Therefore, the hull 1 can be turned without a rudder; the hull 1 has no rudder, and its resistance is further reduced.

As shown in FIG. 1 , in order to make the centrifugal pump 3 work normally, the water inlet 7a of the suction pipe 7 on the centrifugal pump 3 is covered with a filter screen and a scraper that can reciprocate along the filter screen. Scrape off the floating objects on the filter in time.

The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. The present invention is not limited to the above-mentioned embodiments, and various changes made under the premise of not departing from the spirit of the present invention within the scope of knowledge possessed by those of ordinary skill in the art still belong to the scope of the present invention.

Claims (2)

1. A water jet propulsion rudderless drag reduction ship comprises a ship body (1), a propulsion device and a power device;

the power device is an electric motor, a gasoline engine, a diesel engine, a steam turbine, a gas turbine, a nuclear device or a combined device;

the method is characterized in that:

the hull (1) is provided with no rudder;

the propulsion device is a centrifugal pump (3); the centrifugal pump (3) is composed of a pump shell (4), an impeller (5), a pump shaft (6), a water suction pipe (7) and a water pressing pipe (8) into a whole;

the two centrifugal pumps (3) are respectively arranged at the rear end of one hull on two sides of the bow (2) on the ship body (1), and the two centrifugal pumps (3) are positioned below the water surface on which the ship body (1) floats no matter whether the ship body (1) is loaded or not; the outer lateral surface of the pump shell (4) on the side of the centrifugal pump (3) where the pump shaft (6) does not extend out is connected with the inner lateral surface of the ship shell at the corresponding position in a tight fit mode;

the suction pipe (7) of each centrifugal pump (3) vertically penetrates through the hull of the ship body (1) at the corresponding position in a tight fit mode at the rear end, penetrates out of the hull, is bent forwards and tightly attached to the outer side of the hull to extend forwards; the axis of the water suction pipe (7) extending forwards is horizontal, the water suction pipe is gradually flattened in the vertical direction from back to front, the water suction pipe is connected with the hull at the corresponding position in a tight fit mode at the contact part, the water inlet (7a) is a vertical inclined plane, and the included angle between the inclined plane and the hull at the corresponding position is less than 90 degrees;

the water pressing pipe (8) of each centrifugal pump (3) is a round pipe and penetrates through the hull of the ship body (1) at the corresponding position in a close fit mode in an inclined outward and backward direction; the water pressing pipe (8) is positioned outside the hull, is tightly attached to the outer lateral surface of the hull of the ship body (1) at the corresponding position, horizontally extends backwards, is connected with the hull at the corresponding position in a tight fit mode at the contact position, and has a water spraying opening (8a) which is a circular surface;

a pump shaft (6) on each centrifugal pump (3) penetrates through a pump shell (4) on the inner side of the centrifugal pump (3) and extends out towards the middle of the ship body (1);

each centrifugal pump (3) is provided with an impeller (5) arranged on a pump shaft (6), and the impeller is of a single-stage type or a multi-stage type;

the power device respectively provides power for the rotation of a pump shaft (6) on one of the two centrifugal pumps (3);

when a power device drives a pump shaft (6) on a centrifugal pump (3) to rotate, the pump shaft (6) drives an impeller (5) on the pump shaft to synchronously rotate, water outside a ship body (1) flows into a water suction pipe (7) on the centrifugal pump (3) along the outer lateral surface of a bow (2) and a hull of the ship body (1) on the same side of the centrifugal pump (3), the impeller (5) accelerates the water and then sprays the water at a high speed from a water spray opening (8a) of a water pressing pipe (8) on the centrifugal pump (3), and the ship body (1) moves forward or accelerates by overcoming resistance due to the reaction force of the sprayed water flow; during the process that the water in front of the centrifugal pump (3) on the same side is pressed into the suction pipe (7) by the atmospheric pressure, the relative speed of the water is increased, most of the water flows through the outer lateral surface of the ship shell of the bow-side (2) on the same side, and the pressure of the water is reduced according to the Bernoulli principle, so that the resistance to the ship body (1) is reduced; when the power of the two centrifugal pumps (3) on the ship body (1) is equal, the ship body (1) advances along a straight line, and when the power of the two centrifugal pumps (3) is unequal, the ship body (1) turns to one side of the centrifugal pump (3) with small power from the bow direction, so the ship body (1) can also turn without a rudder; the hull (1) is free of rudders, the resistance of which is further reduced.

2. The water jet propelled rudderless drag reducing vessel of claim 1, wherein:

the water inlet (7a) of the water suction pipe (7) on the centrifugal pump (3) is covered with the filter screen and can be followed the scraper blade of the reciprocating rotation of the filter screen, and the scraper blade can be adsorbed on the floating objects on the filter screen to be scraped off in time.

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