EP2597030B1 - Vordüse für ein Antriebssystem eines Wasserfahrzeuges zur Verbesserung der Energieeffizienz - Google Patents

Vordüse für ein Antriebssystem eines Wasserfahrzeuges zur Verbesserung der Energieeffizienz Download PDF

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Publication number
EP2597030B1
EP2597030B1 EP13156118.5A EP13156118A EP2597030B1 EP 2597030 B1 EP2597030 B1 EP 2597030B1 EP 13156118 A EP13156118 A EP 13156118A EP 2597030 B1 EP2597030 B1 EP 2597030B1
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EP
European Patent Office
Prior art keywords
nozzle
angle
profile
opening
water inlet
Prior art date
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Active
Application number
EP13156118.5A
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German (de)
English (en)
French (fr)
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EP2597030A3 (de
EP2597030A2 (de
Inventor
Dirk Lehmann
Friedrich Mewis
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Becker Marine Systems GmbH and Co KG
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Becker Marine Systems GmbH and Co KG
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Priority to PL13156118T priority Critical patent/PL2597030T3/pl
Publication of EP2597030A2 publication Critical patent/EP2597030A2/de
Publication of EP2597030A3 publication Critical patent/EP2597030A3/de
Application granted granted Critical
Publication of EP2597030B1 publication Critical patent/EP2597030B1/de
Priority to HRP20171654TT priority patent/HRP20171654T1/hr
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Anticipated expiration legal-status Critical

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H5/00—Arrangements on vessels of propulsion elements directly acting on water
    • B63H5/07—Arrangements on vessels of propulsion elements directly acting on water of propellers
    • B63H5/16—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in recesses; with stationary water-guiding elements; Means to prevent fouling of the propeller, e.g. guards, cages or screens
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
    • B63H—MARINE PROPULSION OR STEERING
    • B63H1/00—Propulsive elements directly acting on water
    • B63H1/02—Propulsive elements directly acting on water of rotary type
    • B63H1/12—Propulsive elements directly acting on water of rotary type with rotation axis substantially in propulsive direction
    • B63H1/14—Propellers
    • B63H1/28—Other means for improving propeller efficiency

Definitions

  • the invention relates to a pre-nozzle for a propulsion system of a watercraft to improve energy efficiency.
  • a propulsion system for a ship based on a pre-jet is known.
  • the drive system consists of a propeller and a pre-nozzle, which is mounted directly in front of the propeller and has integrated fins or wings in the pre-nozzle.
  • the pre-nozzle has essentially the shape of a flat conical cutout, wherein both openings, both the water inlet and the water outlet opening, are designed as circular openings and the water inlet opening has a larger diameter than the water outlet opening. This makes it possible to improve the propeller inflow as well as to reduce losses in the propeller jet by pre-twist generation by means of the fins or hydrofoils integrated in the pre-nozzle.
  • Object of the present invention is to provide a pre-nozzle for a propulsion system of a watercraft to further improve the drive efficiency, especially for slow, complete ships. This object is achieved by a device having the features of claim 1.
  • the pre-nozzle for a drive system of a watercraft, in particular of a ship of the type described above, according to the invention is designed in such a way that within the pre-nozzle a fin system is arranged.
  • the pre-nozzle is arranged in the shipping direction in front of a propeller. By “in the direction of navigation” is here the forward direction of a ship to understand.
  • Within the pre-nozzle is no propeller, such. B. in Kortdüsen, arranged.
  • the pre-nozzle is spaced from the propeller.
  • the arranged within the pre-nozzle fin system consists of several, for example four or five, fins which are arranged radially to the propeller axis and are connected to the inner surface of the nozzle shell.
  • the individual fins are preferably arranged asymmetrically within the pre-nozzle.
  • the individual fins of the fin system are arranged such that they are substantially within the pre-nozzle and preferably located entirely within the pre-nozzle, i. do not protrude from one or both openings of the pre-nozzle.
  • the propeller of the ship is arranged so that it is substantially outside the pre-nozzle and preferably at no point in the pre-nozzle, i. protrudes through one of the two openings of the pre-nozzle.
  • the extension of the individual fins of the fin system in the longitudinal direction of the pre-nozzle is smaller, or shorter, than the length of the pre-nozzle at its shortest point. Expansion is to be understood as meaning the region or the length along the inner surface of the pre-nozzle, over which the fins extend in the pre-nozzle longitudinal direction. Particularly preferably, the expansion of the individual fins in the longitudinal direction of the pre-nozzle is less than 90%, very particularly preferably less than 80% or even less than 60% of the length of the pre-nozzle at the shortest point of the pre-nozzle.
  • the longitudinal direction corresponds to the flow direction.
  • the individual fins can be employed the same or different. This means that the angles of attack of the individual fins can be chosen and adjusted differently.
  • the angle of attack corresponds to the angle between a surface line along the inner surface of the pre-nozzle and the inner surface-facing side of the edge of the fins.
  • the fins are set at an angle, the angle of attack, to the flow direction.
  • the fins are arranged substantially in the rear region, ie in the region facing the propeller.
  • the inlet area of the pre-nozzle has no fin system and serves only to accelerate the Water flow.
  • the fin system arranged in the rear region of the pre-nozzle or arranged downstream of the inlet region serves (additionally) for pre-twist generation.
  • the pre-nozzle according to the invention is rotationally asymmetrical.
  • the axis of rotation of the pre-nozzle along the pre-nozzle is arranged such that it lies in cross-sectional view of the pre-nozzle in both the vertical and horizontal orientation in the middle and preferably extends through the center of the water outlet opening.
  • the pre-nozzle is thus not imaged onto itself upon rotation about any angle about the axis of rotation.
  • individual flächisegmente for example, a section in the region of the water outlet opening, have rotationally asymmetric properties in itself, the orifice as a whole unit, however, does not represent a body of revolution.
  • rotational asymmetry does not relate to the fin system located within the pre-nozzle. The pre-nozzle is thus independent of the arrangement of the individual fins rotationally asymmetric.
  • the propeller which is located behind the pre-nozzle and spaced therefrom, is stationary, i. H. rotatable about the propeller axis but not (horizontally or vertically) pivotable, and rotatably mounted in a sterntube.
  • the pre-nozzle can be arranged with the rotation axis shifted upwards above the propeller axis.
  • the center of gravity of the pre-nozzle is above the propeller axis.
  • the pre-nozzle can be arranged such that its axis of rotation is parallel to the propeller axis or extends at an angle to the propeller axis and thus is inclined with respect to the propeller axis.
  • the pre-nozzle is centered in the horizontal direction with respect to the propeller axis.
  • the axis of rotation of the pre-nozzle and the propeller axis are in a vertical plane.
  • Nozzles are known in the prior art which are divided into two halves by an approximately vertical plane, with both halves being offset from one another in the longitudinal direction along the vertical plane.
  • the pre-nozzle according to the invention does not consist of two or more longitudinally offset halves.
  • the water outlet opening surface preferably extends over only one plane and in particular not over mutually offset planes.
  • the pre-nozzle according to the invention thus makes it possible to further improve the propulsion efficiency of a ship by improving the propulsion inflow through the formation of the pre-nozzle and reducing the losses in the propeller jet by the pre-nozzle fin system by pre-twisting.
  • the water velocity in the rear of the ship so in the range of the propeller and the pre-nozzle, due to the ship shape or the design of the hull, different.
  • the water velocity in the lower region of the pre-nozzle and the propeller is faster than in the upper region of the pre-nozzle or of the propeller. This is due in particular to the fact that the water inflow velocity in the direction of the pre-nozzle and propeller in the upper region is more strongly decelerated or deflected by the hull than in the lower region.
  • the pre-nozzle Due to the rotationally asymmetric configuration of the pre-nozzle, it is possible to take into account the specific shape of the ship or the influence of the water inflow rates and thus to accelerate the water inflow speed more particularly through the pre-nozzle, especially in the areas of unfavorable aftercurrent, for example in the upper region of the pre-nozzle or propeller as in the region of the cheaper downstream, for example, in the lower region of the pre-nozzle or the propeller. This will distribute the propeller inflow velocity of the water more evenly.
  • the pre-nozzle according to the invention takes into account regions with different secondary flow, in particular a different downstream flow ratio in the upper and lower regions of the pre-jet with respect to the respective flow velocity.
  • Another advantage is that vortex generation can be avoided or reduced by the pre-nozzle according to the invention.
  • the flow is favorably influenced without generating a high resistance or strong vortex.
  • the propeller thrust at the same drive power or alternatively with less drive power without reducing the propeller thrust power and thus energy can be saved.
  • the water inlet opening is expanded upwards or downwards compared with a circular opening of a rotationally symmetrical pre-nozzle.
  • the directions above and below refer here to the installed state of the nozzle to a ship.
  • the water inlet opening of the pre-nozzle according to the invention is widened upwards or downwards. It is also possible that the water inlet opening of the pre-nozzle is extended upwards and downwards.
  • At least one of the two opening surfaces, water inlet opening surface or water outlet opening surface, in the vertical direction has a greater length than in the horizontal direction.
  • the nozzle jacket is typically formed by the so-called "nozzle ring”.
  • the nozzle casing is the so-called casing of the pre-nozzle, wherein the nozzle casing consists of an inner surface and an outer surface.
  • the two surfaces are usually spaced apart from each other.
  • the fin system is not part of the nozzle shell but connected to the inner surface of the nozzle shell with this. In this case, the opening area may be formed over one or more plane or curved planes.
  • the length in the vertical direction is understood to mean the length of the opening area viewed from top to bottom along its vertical center line.
  • the greatest length in the horizontal direction is therefore analogous to the vertical direction, the width of the opening area in the region of its largest dimension to understand.
  • an ellipsoidal opening surface thus has its greatest length in the horizontal direction in the region of its horizontal center line and its greatest length in the vertical direction in the region of its vertical center line.
  • the two opening surfaces, the inlet opening surface and the outlet opening surface may be parallel to each other, partially parallel to each other, and not formed parallel to each other.
  • the lengths in the vertical and horizontal directions always run on the opening surface and thus are not necessarily direct connections of the upper end edge of the nozzle shell with the lower edge of the nozzle shell. If the opening surfaces is formed over several levels, at least one of the two lengths has a kink and / or a curve course.
  • the water inlet-side opening area of the pre-nozzle is greater than a water-inlet-side opening area of a rotationally symmetrical pre-nozzle with the same center radius.
  • the center radius is understood to be the radius of the front nozzle of the upper nozzle jacket arc in the case of a cross-sectional view of the pre-nozzle in the region of the profile center of the pre-nozzle.
  • the center radius represents the radius of the upper circular arc, which would be visible in a cross section in relation to the length of the pre-nozzle, center of the pre-nozzle.
  • the pre-nozzle at least partially encloses the propeller axis of the ship.
  • the pre-nozzle is advantageously arranged such that its axis of rotation is above the propeller axis, but with its lower nozzle shell segment, the propeller axis still encloses.
  • the lower nozzle shell segment can also be on the propeller axis.
  • the inlet opening area of the pre-nozzle is not arranged parallel or only in regions parallel to the water outlet opening area of the pre-nozzle.
  • the water outlet opening area of the pre-nozzle could be (fully) parallel to the cross-section of the pre-nozzle or parallel to the axis of rotation perpendicular and the water inlet opening surface to be inclined to the cross-sectional area of the pre-nozzle or to Rotationsachsensenkrechten the pre-nozzle or (at least partially) have an angle.
  • the pre-nozzle has a greater profile length in the upper region than in the lower region.
  • the profile length runs along the outer surface of the pre-nozzle and thus along a surface line of the nozzle shell.
  • the profile length is not constant and decreases from top to bottom.
  • the profile length can decrease stepwise or suddenly, linearly or following any other function from top to bottom.
  • the profile length remains constant over a range, for example in the upper region of the pre-nozzle and decreases only in the lower region.
  • the profile length of the pre-nozzle in the region of the axis of rotation is greater than in the lower region of the pre-nozzle.
  • the flow-through length is not constant within the pre-nozzle, or longer in the upper region of the pre-nozzle than in the lower region of the pre-nozzle.
  • the water velocity is accelerated in the upper region of the pre-nozzle more or over a longer acceleration distance than in the lower region of the pre-nozzle.
  • the water velocity in the region of the unfavorable downstream flow, in the upper inlet region of the pre-nozzle can be accelerated more than the water already flowing in at higher velocity in the lower region of the pre-nozzle.
  • the water outlet velocity and thus the Propellerzuström aus is more balanced in the upper and lower regions and the speed difference is relatively low.
  • the reduction in the profile length from top to bottom corresponds to an extension of the water inlet opening surface downwards, as thus in the lower area more water, which would have flowed at a constant profile length of the pre-nozzle partially from the outside on the coats of the pre-nozzle, is now detected by the opening and can flow into the pre-nozzle.
  • the water inlet opening surface of the pre-nozzle is provided such that it has at least one intersection angle to the cross-sectional area of the pre-nozzle or to the rotation axis perpendicular to the pre-nozzle.
  • angle of intersection is to be understood as meaning the angle which results in the case of a mental extension of the water inlet opening area and of the cross-sectional area of the pre-nozzle in the area of the intersection of the two sectional areas.
  • the cutting angle thus also corresponds to the angle between the water inlet opening surface and the solder on the pre-nozzle axis, or the axis of rotation of the pre-nozzle.
  • the water inlet opening area and cross-sectional area can thus have several, for example two, angles of intersection with one another.
  • the cutting angle is less than or equal to 90 °, more preferably less than 60 °, and most preferably less than 30 °.
  • the intersection angle between the water inlet-side opening area and the cross-sectional area of the pre-nozzle is constant at least in one area.
  • This range encompasses at least 1%, preferably at least 5% and more preferably at least 20% based on the height of the pre-nozzle in the region of the water outlet opening.
  • the cutting angle is greater than 0 °, at least in this area.
  • the cutting angle could be constant from top to bottom over the entire height of the pre-nozzle.
  • the cutting angle is constant only in a region, for example the lower half of the height of the pre-nozzle, that is to say below the axis of rotation. Since the height of the pre-nozzle does not have to be constant, the height of the pre-nozzle in the area of the water outlet opening is used as a reference.
  • the opening angle of the pre-nozzle is greater than twice the upper profile angle or greater than twice the lower profile angle.
  • the opening angle of the pre-nozzle is the angle between the upper and lower profile line of the pre-nozzle.
  • the profile line is the generatrix in the longitudinal direction of the pre-nozzle along the outer surface of the pre-nozzle jacket.
  • the upper profile line runs along the highest part of the pre-nozzle and the lower profile line along the deepest part of the pre-nozzle.
  • the upper profile line thus has the same length as the profile length in the uppermost region of the pre-nozzle.
  • the lower profile line corresponds to the length of the profile length in the lowest area of the pre-nozzle.
  • the upper profile angle corresponds to the angle between the (mentally elongated) upper profile line and the (mentally elongated) rotation axis of the pre-nozzle.
  • the lower profile angle thus corresponds to the angle between the (mentally elongated) rotation axis and the (mentally extended) lower profile line.
  • the opening angle of the pre-nozzle thus corresponds to the sum of the upper profile angle and the lower profile angle.
  • the opening angle is greater than twice the upper profile angle and thus the lower profile angle is greater than the upper profile angle.
  • the opening angle of the pre-nozzle corresponds to the sum of the double profile angle and the intersection angle.
  • the lower profile angle corresponds to the sum of the cutting angle and the upper profile angle.
  • the water inlet opening area of the pre-nozzle is kinked or curved.
  • the water inlet opening surface can be curved with a constant radius of curvature from top to bottom or have different or multiple radii of curvature.
  • the water inlet opening area seen from top to bottom can have a kink or even several kinks.
  • the water inlet opening surface is formed over several levels, which are at an angle to each other.
  • the water inlet opening surface has a kink and is thus formed over two levels. Both planes are at an angle which is greater than 90 ° and less than 180 ° to each other.
  • the profile length of the pre-nozzle between the upper and lower profile line of the pre-nozzle continuously decreases from top to bottom. Under steady is here to be understood continuously. This means that the profile length continuously decreases from top to bottom. Thus, viewed from top to bottom, the profile length does not increase in any area, but either remains constant within one area and decreases within the next area, or decreases continuously as viewed from top to bottom.
  • the profile length can decrease linearly but also from top to bottom following another function. For example, the profile length could be seen from top to bottom decrease in an arcuate course. It is particularly preferred that the profile length from top to bottom over the entire area, ie between the upper and lower profile line of the pre-nozzle, linearly decreases and thus the value of the intersection angle is constant. Thus, the value of the cutting angle is constant at each point between the upper and lower profile line of the pre-nozzle.
  • the profile length of the pre-nozzle in each region of the pre-nozzle is constant.
  • the water inlet opening area and the water outlet opening area are arranged parallel to each other.
  • the pre-nozzle or the pre-nozzle jacket preferably has straight sections when viewed in cross-section.
  • the Vordüsenmantel has straight sections in cross-sectional view over the entire length of the pre-nozzle.
  • the rectilinear sections connect with cross-sectional view a plurality of arcuate portions with each other.
  • the cross-sectional view of the pre-nozzle jacket could consist of an upper and a lower arc-shaped section or arc segment, wherein both arcuate sections are connected to one another by straight-line sections.
  • two straight-line sections are arranged in the side region of the pre-nozzle jacket and, in particular, opposite one another.
  • the straight sections are in cross-sectional view at the level of the horizontal center line or along the pre-nozzle at the height of the axis of rotation.
  • the arcuate portions could be, for example, semicircles.
  • the straight sections preferably have a rectangular cross section.
  • the rectilinear portions serve to extend the pre-nozzle opening areas in vertical or horizontal direction.
  • the two opening surfaces of the pre-nozzle are widened in the vertical direction by the straight-line sections, whereby thus the pre-nozzle has a greater height than width.
  • Another possible alternative embodiment consists in the formation of the entire nozzle shell with an elliptical cross-section.
  • At least one pre-nozzle opening area has a maximum length between the upper and lower profile line, which is in a ratio between 1.5: 1 and 4: 1 to the mean profile length of the pre-nozzle. Particularly preferred is a ratio between 1.75: 1 and 3: 1, or 1.75: 1 and 2.5: 1, or a ratio in the range of 2: 1.
  • the average profile length of the pre-nozzle is an average profile length of the pre-nozzle.
  • Fig. 1 to 3 show a pre-nozzle 10a with a disposed within the pre-nozzle 10a Fin system 14.
  • the fin system 14 here consists of five individual fins 14a, 14b, 14c, 14d, 14e which are arranged radially in the pre-nozzle 10a and circumferentially asymmetric. It would also be possible more or less to use as five fins.
  • the height of the pre-nozzle in the region of the water outlet opening 13 is smaller than the propeller diameter.
  • the height of the pre-nozzle in the region of the water outlet opening 13 is a maximum of 90%, more preferably a maximum of 80% or even a maximum of 65% of the propeller diameter.
  • the pre-nozzle 10a is as in Fig. 1 shown with respect to the propeller shaft 41 of the ship shifted upwards.
  • rotation axis 18 of the pre-nozzle 10a and propeller axis 41 do not coincide.
  • This has the advantage that, in particular in the case of large, complete ships, in which the region of the unfavorable afterflow is usually in the upper propeller inlet region, the water inflow velocity is more intensified here by the pre-jet effect than in the lower propeller inlet region.
  • the water inflow direction 15 indicates the inflow direction of the water in the direction of the pre-nozzle 10a and thus also the direction of forward travel of the ship in the opposite direction.
  • FIGS. 2 and 3 further show that the water inlet side opening 12 of the pre-nozzle 10a is extended downwards.
  • the opening surfaces 19, 20 enclosed by the front-side edges 31, 32 are parallel to one another.
  • the water inlet-side pre-nozzle opening 12 is beveled viewed from top to bottom.
  • the water inlet opening area 19 enclosed by the end edge 31 of the nozzle shell 11 of the pre-nozzle 10a is formed over two levels 19a, 19b. These two levels are at an angle 36 which is greater than 90 ° and less than 180 ° to each other.
  • the downwardly beveled water inlet opening surface 19 forms a cutting angle 27 to the cross-sectional area 34 of the pre-nozzle 10a in the region of the bend 42 and the imaginary parallel displaced cross-sectional area 34 of the pre-nozzle 10a.
  • the pre-nozzle 10a thus has a shorter profile length 22 in the lower region than in the upper region.
  • the profile length 21, 22 viewed from top to bottom is constant up to the region of the bend 42.
  • the profile length decreases 21, 22 viewed from top to bottom between kink 42 and the lower profile line 24 linearly.
  • the opening angle 30 of the pre-nozzle 10a which is formed by the upper and lower profile line 23, 24 of the pre-nozzle 10a, is greater than twice the upper profile angle 28, which by the two legs, upper profile line 23 and rotation axis 18 of the pre-nozzle 10a is formed.
  • the lower profile angle 29 is formed by the two legs, rotation axis 18 of the pre-nozzle 10 a and lower profile line 24.
  • the lower profile angle 29 corresponds to the sum of the cutting angle 27 and the upper profile angle 28, resulting in a downwardly enlarged opening angle 30, which thus corresponds to the sum of the double upper profile angle 28 and the cutting angle 27.
  • the Vordüsenö Stamms character 19 is enlarged in comparison to an opening of a pre-nozzle with circular and mutually parallel opening surfaces and in particular increases downwards.
  • the opening 12 has an elliptical shape by its bevel in the lower region in plan view from the front.
  • the length of the water inlet-side Vordüsenö Stamms simulation 19 is also in the vertical direction, ie viewed from the upper profile line 23 to the lower profile line 24 longer than in the horizontal direction. The length runs in the vertical direction over the two levels of the water inlet opening surface 19, or along the opening area.
  • the upper and lower profile lines 23, 24 of the pre-nozzle 10a correspond to the generatrices in the uppermost and in the lowest area of the pre-nozzle 10a.
  • FIGS. 2 and 3 further show two brackets 25, 26, wherein a bracket 25 in the upper region of the pre-nozzle 10a and the other bracket 26 in the lower region the pre-nozzle 10a is located.
  • the two brackets 25, 26 are used for attachment or attachment of the pre-nozzle 10a with the hull.
  • the number of brackets 25, 26 may vary.
  • the upper bracket 25 is disposed substantially outboard of the pre-nozzle 10a, and the lower bracket 26 is disposed substantially inward of the pre-nozzle 10a with portions of both brackets 25, 26 projecting forward beyond the pre-nozzle 10a.
  • the effect of the pre-nozzle 10a and the associated acceleration of the water flow in the upper region is greater than in the lower region.
  • the acceleration section within the pre-nozzle 10a is thus shorter in the lower region than in the upper region. This ensures that the water flow in the upper region, ie in the region of the unfavorable downstream flow is accelerated more than in the lower region.
  • the 4 to 6 also show a pre-nozzle 10b with extended water inlet opening 10.
  • the pre-nozzle 10a according to the Fig. 1 to 3 has the in the 4 to 6 shown pre-nozzle 10b also in the upper region of the pre-nozzle 10b longer profile length 21 than in the lower region of the pre-nozzle 10b.
  • the water inlet opening 12 is beveled viewed from top to bottom.
  • the water inlet opening surface 19 is formed only over a plane, this plane is not completely parallel to the cross-sectional area 34 of the pre-nozzle 10b or to the water outlet surface 20 of the pre-nozzle 10b by the bevel.
  • the opening angle 30 of the pre-nozzle 10b thus corresponds to the sum of the upper and the lower profile angle 28, 29, wherein both profile angles 28, 29 of the pre-nozzle 10b are the same size. Due to the bevel viewed from top to bottom, an elliptical opening shape is also created from the front when the top view of the pre-nozzle 10b is viewed from above.
  • the length of the water inlet opening surface 19 in the vertical direction, that is viewed from top to bottom, between the upper and lower profile line 23, 24, is thus also longer than the width, or length in the horizontal direction of the water inlet opening surface 19.
  • the lengths are in each case, or along, the opening area.
  • Fig. 7 to 9 show a pre-nozzle 10c with two mutually parallel opening surfaces 19, 20.
  • the pre-nozzle 10c has a constant profile length 21, 22 on.
  • the opening angle 30 thus corresponds to the sum of the lower and upper profile angle 28, 29, wherein lower and upper profile angle 28, 29 are equal.
  • a cutting angle 27 between the water inlet opening surface 19 and cross-sectional area 34 of the pre-nozzle 10c does not arise here, or is 0 °.
  • the nozzle shell 11 of the pre-nozzle 10c consists essentially of four segments, two arcuate segments 39, 40 and two straight segments 37, 38.
  • the two straight segments 37, 38 are arranged opposite one another in the lateral areas of the pre-nozzle 10c.
  • the front view of the pre-nozzle 10c in Fig. 7 shows that the two straight sections 37, 38 lie at the height of the axis of rotation 18 of the pre-nozzle 10c and thus connect a lower and an upper arcuate portion 39, 40 with each other.
  • the two arcuate portions 39, 40 are as in Fig. 7 shown semicircles or semicircular arc sections. However, the arcuate portions 39, 40 could also have another configuration, for example an elliptical configuration.
  • the front nozzle 10c has a water inlet opening area 19 whose height or length in the vertical direction is greater than the width or length in the horizontal direction.
  • the two rectilinear sections 37, 38 recognizable by cross-sectional viewing are as in FIG Fig. 9 shown constant over the entire length of the pre-nozzle 10c. But it would also be possible, these straight sections 37, 38 along the pre-nozzle 10c, for example, from the water inlet opening 12 to the water outlet opening 13, wedge-shaped or otherwise form.
  • the cross-section of the straight sections 37, 38 which in the present example is rectangular and constant, would change along the pre-nozzle 10c. For example, the rectangular cross-sectional area could decrease viewed from the front to the rear.
  • the rectilinear sections 37, 38 to taper to a point, which means that the cross-sectional area 34 of the pre-nozzle 10c in the region of the water outlet opening 13 would not have any straight sections 37, 38.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • Ocean & Marine Engineering (AREA)
  • Hydraulic Turbines (AREA)
  • Nozzles (AREA)
  • Other Liquid Machine Or Engine Such As Wave Power Use (AREA)
  • Structures Of Non-Positive Displacement Pumps (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Jet Pumps And Other Pumps (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
EP13156118.5A 2011-02-25 2011-07-12 Vordüse für ein Antriebssystem eines Wasserfahrzeuges zur Verbesserung der Energieeffizienz Active EP2597030B1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
PL13156118T PL2597030T3 (pl) 2011-02-25 2011-07-12 Dysza wstępna układu napędowego pojazdu wodnego dla polepszenia sprawności
HRP20171654TT HRP20171654T1 (hr) 2011-02-25 2017-10-30 Pred-mlaznica za pogonski sustav plovila za poboljšanje energetske učinkovitosti

Applications Claiming Priority (2)

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DE202011000439U DE202011000439U1 (de) 2011-02-25 2011-02-25 Vordüse für ein Antriebssystem eines Wasserfahrzeuges zur Verbesserung der Energieeffizienz
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DE202013101943U1 (de) * 2013-05-06 2013-06-11 Becker Marine Systems Gmbh & Co. Kg Vorrichtung zur Verringerung des Antriebsleistungsbedarfs eines Wasserfahrzeuges
KR101425369B1 (ko) * 2013-05-30 2014-08-06 에스티엑스조선해양 주식회사 핀 구조물을 갖는 덕트형 선체 부가물
CN103332280B (zh) * 2013-07-01 2017-09-29 中国船舶科学研究中心上海分部 光芒型前置导轮
CN103332281B (zh) * 2013-07-19 2017-03-08 上海船舶研究设计院 用于右旋单桨船的预旋三角导管
CN104002950B (zh) * 2014-05-06 2017-01-04 浙江海洋学院 一种新型的渔船节能预旋伴流补偿导管
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CN105346698A (zh) * 2015-12-02 2016-02-24 南通虹波机械有限公司 高效节能导轮
CN106314737B (zh) * 2016-09-20 2018-03-27 宋华权 新型舰用二元复式电动推进器
JP6811629B2 (ja) * 2017-01-27 2021-01-13 三菱重工業株式会社 ダクト装置および船舶
CN107487429A (zh) * 2017-08-23 2017-12-19 北京臻迪科技股份有限公司 静叶结构、推进器及水下航行器
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CN104648641B (zh) 2017-09-12
CN102673760B (zh) 2015-07-22
CN104648642A (zh) 2015-05-27
PT2492185E (pt) 2014-07-11
CN104309791A (zh) 2015-01-28
SG183644A1 (en) 2012-09-27
EP2492185B1 (de) 2014-04-02
JP2012180085A (ja) 2012-09-20
DK2597030T3 (da) 2017-11-13
TW201512037A (zh) 2015-04-01
DK2492185T3 (da) 2014-07-07
NO2903476T3 (zh) 2018-03-03
TWI583598B (zh) 2017-05-21
HK1172301A1 (zh) 2013-04-19
CN102673760A (zh) 2012-09-19
CA2769332C (en) 2015-06-02
HRP20161152T1 (hr) 2016-11-18
TWI498253B (zh) 2015-09-01
HK1182675A1 (zh) 2013-12-06
HRP20171654T1 (hr) 2017-12-15
KR20120098514A (ko) 2012-09-05
EP2597030A3 (de) 2013-08-07
DK2597029T3 (en) 2016-09-19
ES2590044T3 (es) 2016-11-17
PL2597029T3 (pl) 2016-12-30
PT2597030T (pt) 2017-11-13
JP5676506B2 (ja) 2015-02-25
JP2014111458A (ja) 2014-06-19
EP2597029A2 (de) 2013-05-29
EP2597029B1 (de) 2016-06-08
KR20150116806A (ko) 2015-10-16
DE202011110549U1 (de) 2014-07-25
CA2769332A1 (en) 2012-08-25
US8944869B2 (en) 2015-02-03
KR20150003446U (ko) 2015-09-16
TWI583597B (zh) 2017-05-21
CN104648641A (zh) 2015-05-27
US20130059491A1 (en) 2013-03-07
CN104648642B (zh) 2017-07-28
TW201512036A (zh) 2015-04-01
DE202011000439U1 (de) 2012-08-21
ES2475994T3 (es) 2014-07-11
EP2597029A3 (de) 2013-07-10
JP2015057348A (ja) 2015-03-26
SG10201400515XA (en) 2014-05-29
HK1205077A1 (zh) 2015-12-11
ES2645399T3 (es) 2017-12-05
HRP20140573T1 (hr) 2014-08-01
EP2492185A1 (de) 2012-08-29
PL2597030T3 (pl) 2018-02-28
CN104309791B (zh) 2017-06-09
EP2597030A2 (de) 2013-05-29
DE202011110550U1 (de) 2014-07-25
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JP6212027B2 (ja) 2017-10-11
KR20150120897A (ko) 2015-10-28

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