Fairing inclined propeller shaft speed of the vessel with bottom gas caverns

IPC classes for russian patent Fairing inclined propeller shaft speed of the vessel with bottom gas caverns (RU 2141426):

B63B3/42 - Shaft brackets

B63B1/38 - SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING (air-cushion vehicles B60V; arrangements of vessel ventilation, heating, cooling, or air-conditioning B63J0002000000)

B63B1/08 - SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING (air-cushion vehicles B60V; arrangements of vessel ventilation, heating, cooling, or air-conditioning B63J0002000000)

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(57) Abstract:

The invention relates to shipbuilding and for the establishment of fairings inclined propeller shafts of high-speed vessels with bottom gas caverns. The vessel has one or more propeller shafts, rudders and the gas pipeline to create the above-mentioned cavity. Each propeller shaft is made with bracket. At the bottom of the craft set of sidewall and one or more transverse steps. The width of the fairing in place of exit of the propeller shaft is not less than 3.5 diameters of the propeller shaft. For the location of the output shaft of the fairing on the length of the latter, equal to not less than 25% of the distance from its end to its intersection with the axis of the propeller shaft with the surface of the fairing, the width of the fairing selected deviation within 15% of its maximum width at the intersection of the propeller shaft with the surface of the fairing. The fairing may be continued beyond the bracket propeller shaft towards the rear, forming simultaneously a fairing bracket propeller shaft. The surface of the fairing can be crossed by a steering shaft. The fairing may start from the nearest to the stern of the vessel cross step and to have a height in its beginning, not much height this is Bagatela in the presence of the angle of drift of the vessel and in enhancing the effect of reducing the hydrodynamic resistance of the vessel, due to the creation of cavities, which is achieved by storing area of the bottom of the ship, covered with cavities. 3 C.p. f-crystals, 23 ill.

The invention relates to the field of shipbuilding and the issue of designing fairings inclined propeller shafts of high-speed vessels with artificial gas cavities on the bottom.

Known vessels with one or more transverse steps and sidewall serving for the formation of artificial bottom of the cavities, which are created by blowing air or other gas (e.g., exhaust gas from the engines of the ship). When used as propulsion on these ships propellers with inclined shafts used fairings propeller shafts, in order to avoid the partial destruction of the caverns, which occurs due to crossing its surface shafts. These fairings can be elongated in the longitudinal direction of the body (type racks for underwater wings) with a thickness only slightly greater than the diameter of the propeller shaft, in particular, for example, a high - speed fairing vessel with screw propulsion in RF patent N 2093392 from 20.10.97 g , B 60 V 3/06, B 63 B 1/38 adopted as a prototype. However, fairings described type have the disadvantage, sanlucas is castka caverns, located behind the fairing. This leads to reduction of the area of the bottom covered with cavities, and consequently, to decrease the effect of reducing the hydrodynamic resistance of the vessel, due to the creation of cavities.

The present invention is to eliminate this drawback.

This is achieved by the fact that the fairing propeller shaft speed of the vessel with bottom gas cavities having one or more propeller shafts, each of which with bracket, handlebars, and on the bottom of one or more transverse steps and the sidewall, a gas pipeline for the creation of artificial gas cavities on the surface of the bottom, made in the place of exit of the propeller shaft width, amounting to at least 3.5 diameters of the propeller shaft and output shaft of the fairing on the length of the fairing, equal to not less than 25% distance from its end to its intersection with the axis of the propeller shaft with the surface of the fairing, the width of the fairing selected deviation within 15% of its maximum width at the intersection of the propeller shaft with the surface of the fairing.

This fairing inclined propeller shaft speed of the ship may be extended beyond the bracket propeller shaft in the ground off the steering shaft. Fairing inclined propeller shaft may start from the nearest to the stern of the vessel cross step and to have a height in its beginning, not greater height of this step.

The implementation of the fairing in place of exit of the propeller shaft with a minimum width of 3.5 diameters of the propeller shaft is sufficient to remove the output shaft of the fairing from the surface of the cavity and thus avoid destruction caverns shaft.

Maintaining an almost constant width of the fairing inclined propeller shaft with a deviation of not more than 15% on the length of the fairing at least 25% of the distance from its end to the intersection of the axis of the propeller shaft with the surface of the fairing allows you to avoid the destruction of the caverns from exposure to the fairing.

The continuation of the fairing inclined propeller shaft towards the rear beyond the bracket propeller shaft so that it simultaneously was fairing bracket propeller shaft, avoids the destruction of the caverns at the site of the base plate, located behind the bracket propeller shaft.

The implementation of the rudder stock rudder crossing fairing inclined propeller shaft helps prevent the destruction of the end portion of the cavity at small angles of rudder, akinoshima from the nearest to the stern of the vessel cross step height in its beginning is not greater height of the step allows you to design the fairing without nasal tapering, thus facilitating its shape.

Specific characteristics of the fairing depend on the individual parameters of the hull and placement of propeller shafts. These characteristics should be selected such that the bottom surface of the fairing in the area of the exit shaft had a shape resembling the shape of the corresponding section of the caverns (implemented in the absence of the shaft and its fairing) and that it was located a little below the named section.

The invention is illustrated by drawings, where:
in Fig. 1 shows a General view of the vessel with the fairing inclined propeller shaft lying bottom up; the vessel with one transverse step and one propeller shaft;
in Fig. 2 and 3 respectively shows a view of the bottom and side view of the vessel shown in Fig.1;
in Fig. 4, 5, 6 - cross-section of the hull planes A-A, B-B, C-C, shown in Fig. 3;
in Fig. 7 and 8, respectively, presents a view of the bottom and side view of a vessel with two lateral steps and fairings two inclined shafts;
in Fig. 9, 10, 11 - cross-section of the hull planes A-A, B-B, C-C, shown in Fig. 8;
in Fig. 12 and 13, respectively, presents a view of the bottom and side view with the La;
in Fig. 14 and 15, respectively, presents a view of the bottom and side view of the vessel with the fairing inclined propeller shaft and hub of the propeller shaft that intersects the rudder stock rudder;
in Fig. 16 and 17, respectively, presents a view of the bottom and side view of a vessel with a propeller shaft fairing, starting from the last cross of step (in this example, it is the first step) and having a place of his beginning a height less than the height of the transverse step; the example of a ship with one transverse step and one propeller shaft;
in Fig. 18 is a cross section of the hull plane A-A shown in Fig 16;
in Fig. 19 and 20, respectively, presents a view of the bottom and side view of the vessel with fairings propeller shafts, starting from the last transverse step and having in its beginning, height equal to the height of the step; the example of the double-shaft ship with two lateral steps;
in Fig. 21 is a cross section of the hull plane A-A shown in Fig 19;
in Fig. 22 presents a view of the bottom of the vessel with a cavity having a fairing of the propeller shaft; the example single-shaft ship with one transverse step, moving with the operating speed of the Noi, that, and Fig. 22, but the ship without fairing propeller shaft.

The Radome 1 of the propeller shaft 2 with the bracket 3 and the propeller screw 4 is mounted on the hull of the vessel 5, the bottom of which there is at least one transverse step 6 and the sidewall 7, the gas conduit (not shown) for the creation of artificial cavities on the bottom of the handlebars and 8.

In place of the output of the propeller shaft 2 of the fairing 1 the width of the fairing 1 is not less than 3.5 diameters of the propeller shaft 2 and output shaft of the fairing on the length not less than 25% of the distance from its end to its intersection with the axis of the propeller shaft with the surface of the fairing this width remains almost constant.

Fairing 1 continued beyond the bracket 3 of the propeller shaft 2 in the direction of the stern of the vessel, being at the same time, the fairing bracket propeller shaft 2 (Fig. 12, 13).

The steering shaft 8 is made and placed in such a way that it intersects the surface of the Radome 1 (Fig. 14, 15).

Fairing 1 starts from the nearest to the stern of the vessel cross step 6, starting at the height of the fairing in step 6 does not exceed the height of the step 6 (Fig. 16, 17, 19, 20).

When the vessel is equipped with fairings inclined Horny, formed through the step or steps at the bottom. As a result, the cavity covers more surface area of the bottom of the vessel than the vessel without fairings propeller shafts, and soaked the bottom surface and consequently is less (Fig. 22, 23).

1. Fairing inclined propeller shaft speed of the vessel with bottom gas cavities having one or more propeller shafts, each of which with bracket, handlebars, and on the bottom is one or more transverse steps and the sidewall, a gas pipeline for the creation of artificial gas cavities on the surface of the base plate, characterized in that the fairing in place of exit of the propeller shaft is made with a width constituting not less than 3.5 diameter of the propeller shaft and output shaft of the fairing on the length of the fairing, equal to not less than 25% distance from its end to its intersection with the axis of the propeller shaft with the surface of the fairing, the width of the fairing selected deviation within 15% of its maximum width at the intersection of the propeller shaft with the surface of the fairing.

2. Fairing under item 1, characterized in that it continued beyond the bracket propeller shaft towards the rear, forming simultaneously a fairing CR is on the steering shaft.

4. Fairing according to any one of the preceding paragraphs, characterized in that it starts from the nearest to the stern of the vessel cross step and has a height at its beginning, not the great height of this step.