EP2311724A1 - Method for constructing a nozzle and a nozzle - Google Patents
Method for constructing a nozzle and a nozzle Download PDFInfo
- Publication number
- EP2311724A1 EP2311724A1 EP10187057A EP10187057A EP2311724A1 EP 2311724 A1 EP2311724 A1 EP 2311724A1 EP 10187057 A EP10187057 A EP 10187057A EP 10187057 A EP10187057 A EP 10187057A EP 2311724 A1 EP2311724 A1 EP 2311724A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- wall
- profile
- nozzle
- cylindrical body
- hollow cylindrical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- 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
- B63H5/14—Arrangements on vessels of propulsion elements directly acting on water of propellers characterised by being mounted in non-rotating ducts or rings, e.g. adjustable for steering purpose
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D19/00—Flanging or other edge treatment, e.g. of tubes
- B21D19/02—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge
- B21D19/04—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers
- B21D19/046—Flanging or other edge treatment, e.g. of tubes by continuously-acting tools moving along the edge shaped as rollers for flanging edges of tubular products
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/14—Spinning
- B21D22/18—Spinning using tools guided to produce the required profile
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B71/00—Designing vessels; Predicting their performance
Definitions
- the invention relates to a method according to the preamble of claim 1.
- the method relates to the construction of a nozzle as is described, among others, in EP A 1129006 .
- the first profile and/or the second profile of the inner wall is built up by welding smaller components formed from a flat plate against or onto supporting ribs and longitudinal partitions, which supporting ribs and longitudinal partitions are attached to the outer side of a narrow hollow cylindrical body. This makes forming the first profile and possibly also a second profile extremely cumbersome due to the large number of welds which run both in the longitudinal direction and the transverse direction of the nozzle so that the desired smooth shape of the inner wall cannot always be achieved.
- the method is performed according to claim 1. In this manner, an inner wall with the required shape can be achieved, wherein fewer welds are required for constructing the inner wall and which also results in few grinding operations being required in order to achieve the desired smooth shape.
- the method is performed according to claim 2.
- the inner wall has no concentric welds, which produces a very smooth shape of the inner wall without the need for additional finishing operations and with less welding work being required.
- the method is performed according to claim 3. In this manner, the outer side of the nozzle is easy to construct.
- the method is performed according to claim 4.
- the plates on the outer side of the nozzle are easy to attach, thus resulting in a rigid construction.
- the method is performed according to claim 5. As a result, it is possible to form the desired profile in the relatively thick plate material of the inner wall.
- the method is performed according to claim 6. Applying a metal-spinning operation in order to achieve the desired shape prevents the wall thickness of the relatively thick inner wall from being rolled out and the inner wall from becoming too thin when forming the first profile and/or second profile.
- the method is performed according to claim 7.
- the inner ring maintains its circular shape.
- the invention also comprises a nozzle according to the preamble of claim 8.
- a nozzle is known from EP A 1129006 .
- the profile of the inner wall of the known nozzle is built up from segments that are joined by welding. In this manner, the shape of the inner wall is not always smooth, which is disadvantageous to the flow of water through the nozzle.
- the assembly of the segments to form an inner wall also requires many hours of work.
- the nozzle is according to claim 8. As a result, the nozzle is easier to assemble and requires less finishing work on the inner surface of said nozzle.
- the nozzle is according to claim 9.
- the inner wall is easier to form as there are no concentric welds or butt welds, which makes said inner wall smoother.
- the nozzle is according to claim 10.
- the plates on the outer circumference of the nozzle can be narrower, which makes them easier to produce and/or to attach.
- the nozzle is according to claim 11.
- the length of the plates around the outer circumference can be smaller and these are thus easier to produce and/or to attach.
- Figure 1 shows a nozzle 1 with an inner wall 2 abc that is formed from a hollow cylindrical body 2, one outer end of which is formed to provide a first profile 2 a and wherein the second outer end is formed to provide a second profile 2 c .
- a cylindrical part 2 b that corresponds to the original unformed hollow cylindrical body 2.
- This cylindrical part 2 b of the nozzle 1 encircles a screw propeller (not shown) that rotates within the nozzle 1 with minimal clearance.
- the nozzle 1 has a wall thickness t, which wall thickness t at the point of the cylindrical part 2b corresponds to the wall thickness of the unformed hollow cylindrical body 2.
- the wall thickness t' at the larger diameter will become smaller as the diameter increases.
- the wall thickness t' is at least 80% of the wall thickness t and preferably at least 90% of wall thickness t.
- the cylindrical part 2 b is formed with a greater wall thickness and/or possibly also from a different material.
- the front side of the nozzle 1 has a nose profile 3 that is shown here as a solid rod, but can also be constructed as a tube or as any other convenient profile.
- the rear side of the nozzle 1 has a rear profile 5 that can have the same construction but, for example, with dimensions other than those of the nose profile 3.
- the edges of the exterior plates 6 are attached against or to the nose profile 3, the rear profile 5 or against the edge of another exterior plate 6 by means of a weld. In the latter case, the edges of the exterior plates 6 lie on a support partition 4 and are welded thereto.
- the number of support partitions 4 and thus also the number of concentric welds between the exterior plates 6 depends on the width of the nozzle 1 and that this width is, among other things, dependent on the diameter of the thruster 1.
- the nozzle 1 can also be constructed without a nose profile 3 or rear profile 5, and also without support partitions 4. In that case the exterior plate or exterior plates 6 is/are welded directly to the inner wall 2 abc .
- Figure 2 shows a metal-spinning machine 7 with a column 8 for supporting a revolving table 9 with a horizontal first axis of rotation 11.
- the metal-spinning machine has a longitudinal guide 27 along which a longitudinal carriage 23 can be moved in a direction parallel to the first axis of rotation 11.
- a cross-slide 25 can be moved along the longitudinal carriage 23 in a direction at right angles to the first axis of rotation 11.
- a swivelling arm 24 is attached to the cross-slide 25 and can be rotated about an axis 26.
- a stationary roller support 19 and a movable roller support 20 are attached to the swivelling arm 24, wherein a clamping cylinder 22 can move the movable roller support 20 along a clamping guide 21 towards the stationary roller support 19.
- the stationary roller support 19 supports an inner roller 15 that can rotate about a second axis of rotation 16.
- the movable roller support 20 supports an outer roller 17 that can rotate about a third axis of rotation 18.
- the second axis of rotation 16 and the third axis of rotation 18 are parallel.
- clamping segments 14 are attached around a coupling piece 12.
- the clamping segments 14 can be moved in relation to the coupling piece 12 by clamping means 13, thus forming a clamping bush.
- the clamping means 13 can clamp the clamping bush within an inner surface of the hollow cylindrical body 2.
- the coupling piece 12 is mounted on a support bush 10 so that the hollow cylindrical body 2 can rotate about the first axis of rotation 11. Possibly a quick-release coupling is provided between the coupling piece 12 and the support bush 10 so that the hollow cylindrical body 2 can be easily remounted and be formed at both ends.
- the clamping bush can be used on a welding manipulator (not shown) for the further assembly of the nozzle 1.
- Figure 2 shows the start of the forming operation of the hollow cylindrical body 2. Movements of the longitudinal carriage 23 along the longitudinal guide 27 and of the cross-slide 25 along the longitudinal carriage 23 allow the inner roller 15 to be positioned on the inner side of the hollow cylindrical body 2. Subsequently, the clamping cylinder 22 forces the outermost roller 17 against the outer surface of the hollow cylindrical body 2. In order to form the hollow cylindrical body to the first profile 2 a or the second profile 2 c , the rollers 15, 17 are moved towards the rim, whilst the hollow cylindrical body 2 rotates about a first axis of rotation 11, so that the inner roller 15 and the outer roller 17 form a helical path along the hollow cylindrical body 2.
- FIG. 3c shows the forming of the second rim of the hollow cylindrical body 2 after the coupling piece 12 is positioned with the other side on the support bush 10.
- the inner roller 15 and the outer roller 17 are clamped against and moved along the hollow cylindrical body 2 in such a way that the desired first profile 2 a or the second profile 2 c are formed in one go. If necessary, the operation can be repeated a number of consecutive times, whereby account is taken of the fact that the plate thickness t' becomes thinner by rolling the rollers 15, 17 over the material of the hollow cylindrical body 2 and possibly also increases the total width of the hollow cylindrical body 2.
- Figure 4 shows the beginning of the assembly of the inner ring 2 abc with the various components to form the nozzle 1.
- Figures 5 and 6 show the successive stages during the assembly and figure 7 shows the nozzle 1 when this is ready to be mounted to a ship.
- Figures 4, 5 and 6 show a schematic view of the clamping segments 14 as can be applied when assembling the nozzle 1, by mounting this together with the clamping segments 14 to a welding manipulator (not shown).
- a first transition 28 indicates the transition of the first profile 2 a to the cylindrical part 2 b of the inner wall 2 abc
- a second transition 29 indicates the transition of the second profile 2 c with the cylindrical part 2 b .
- the longitudinal partitions are first placed on the outer circumference of the inner wall 2 abc .
- Longitudinal partitions 30 of a connecting chamber and a central partition 31 of the connecting chamber are positioned parallel to the upper side of the inner wall 2 abc and a lower longitudinal partition 35 is placed on the underside.
- the connecting chamber connects the upper side of the nozzle 1 to the underside of the ship.
- FIG 5 shows a supporting partitions 4 are then positioned and welded and, as shown in figure 6 , the lateral partitions 32 and dividing partitions 33 of the connecting chamber are then placed in position and welded.
- Figure 7 shows nozzle 1 after the exterior plates 6 have been mounted and welded.
- the nozzle 1 is connected to the ship by means of a connecting chamber. It will be evident that this can be implemented in various different ways.
- the inner wall 2 abc has a cylindrical part 2 b .
- a cylindrical part 2 b enables a good cooperative operation between the screw propeller and the nozzle 1.
- This cylindrical part 2 b can also be very short or not be present at all.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Ocean & Marine Engineering (AREA)
- Butt Welding And Welding Of Specific Article (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
Abstract
Description
- The invention relates to a method according to the preamble of
claim 1. The method relates to the construction of a nozzle as is described, among others, inEP A 1129006 . In the method known in the prior art for constructing this nozzle, the first profile and/or the second profile of the inner wall is built up by welding smaller components formed from a flat plate against or onto supporting ribs and longitudinal partitions, which supporting ribs and longitudinal partitions are attached to the outer side of a narrow hollow cylindrical body. This makes forming the first profile and possibly also a second profile extremely cumbersome due to the large number of welds which run both in the longitudinal direction and the transverse direction of the nozzle so that the desired smooth shape of the inner wall cannot always be achieved. - In order to overcome this drawback, the method is performed according to
claim 1. In this manner, an inner wall with the required shape can be achieved, wherein fewer welds are required for constructing the inner wall and which also results in few grinding operations being required in order to achieve the desired smooth shape. - According to an embodiment of the invention, the method is performed according to
claim 2. In this manner, the inner wall has no concentric welds, which produces a very smooth shape of the inner wall without the need for additional finishing operations and with less welding work being required. - According to an embodiment of the invention, the method is performed according to
claim 3. In this manner, the outer side of the nozzle is easy to construct. - According to an embodiment of the invention, the method is performed according to claim 4. As a result, the plates on the outer side of the nozzle are easy to attach, thus resulting in a rigid construction.
- According to an embodiment of the invention, the method is performed according to
claim 5. As a result, it is possible to form the desired profile in the relatively thick plate material of the inner wall. - According to an embodiment of the invention, the method is performed according to
claim 6. Applying a metal-spinning operation in order to achieve the desired shape prevents the wall thickness of the relatively thick inner wall from being rolled out and the inner wall from becoming too thin when forming the first profile and/or second profile. - According to an embodiment of the invention, the method is performed according to
claim 7. In this way, during the metal-spinning operation, which causes local deformation of the inner ring, the inner ring maintains its circular shape. - The invention also comprises a nozzle according to the preamble of
claim 8. Such a nozzle is known fromEP A 1129006 . As previously described, the profile of the inner wall of the known nozzle is built up from segments that are joined by welding. In this manner, the shape of the inner wall is not always smooth, which is disadvantageous to the flow of water through the nozzle. The assembly of the segments to form an inner wall also requires many hours of work. - In order to avoid these drawbacks, the nozzle is according to
claim 8. As a result, the nozzle is easier to assemble and requires less finishing work on the inner surface of said nozzle. - According to an embodiment of the invention, the nozzle is according to claim 9. In this manner, the inner wall is easier to form as there are no concentric welds or butt welds, which makes said inner wall smoother.
- According to an embodiment of the invention, the nozzle is according to
claim 10. As a result, the plates on the outer circumference of the nozzle can be narrower, which makes them easier to produce and/or to attach. - According to an embodiment of the invention, the nozzle is according to
claim 11. As a result, the length of the plates around the outer circumference can be smaller and these are thus easier to produce and/or to attach. - The invention is explained below with reference to several exemplary embodiments by means of a drawing.
- In the drawing:
-
Figure 1 shows a cross-section of a nozzle according to the invention, -
Figure 2 shows a top view of a device for forming an inner wall of the nozzle according tofigure 1 , -
Figure 3 shows details of the cross-section of the nozzle during the various forming steps of the inner wall on the device offigure 2 , -
Figure 4 shows a view in perspective of a first step in the assembly of the nozzle offigure 1 , -
Figure 5 shows a view in perspective of a second step in the assembly of the nozzle offigure 1 , -
Figure 6 shows a view in perspective of a third step in the assembly of the nozzle offigure 1 , -
Figure 7 shows a view in perspective of the assembled nozzle offigure 1 . -
Figure 1 shows anozzle 1 with aninner wall 2abc that is formed from a hollowcylindrical body 2, one outer end of which is formed to provide afirst profile 2a and wherein the second outer end is formed to provide asecond profile 2c. Between thefirst profile 2a and thesecond profile 2c there is acylindrical part 2b that corresponds to the original unformed hollowcylindrical body 2. Thiscylindrical part 2b of thenozzle 1 encircles a screw propeller (not shown) that rotates within thenozzle 1 with minimal clearance. Thenozzle 1 has a wall thickness t, which wall thickness t at the point of thecylindrical part 2b corresponds to the wall thickness of the unformed hollowcylindrical body 2. When the hollowcylindrical body 2 is formed to provide thefirst profile 2a or thesecond profile 2c, the wall thickness t' at the larger diameter will become smaller as the diameter increases. In order to maintain sufficient strength of theinner wall 2abc across the entire width, the wall thickness t' is at least 80% of the wall thickness t and preferably at least 90% of wall thickness t. - In another embodiment of the
cylindrical part 2, thecylindrical part 2b is formed with a greater wall thickness and/or possibly also from a different material. In such an embodiment, there are one or two concentric welds or butt welds in the hollowcylindrical body 2 and thefirst profile 2a and/or thesecond profile 2c is formed from plates of a different wall thickness and/or from a different material than the plates from which thecylindrical part 2b is formed. - The front side of the
nozzle 1 has anose profile 3 that is shown here as a solid rod, but can also be constructed as a tube or as any other convenient profile. The rear side of thenozzle 1 has arear profile 5 that can have the same construction but, for example, with dimensions other than those of thenose profile 3. On the outer side of theinner wall 2abc two support partitions 4 are applied in order to support theexterior plates 6. The edges of theexterior plates 6 are attached against or to thenose profile 3, therear profile 5 or against the edge of anotherexterior plate 6 by means of a weld. In the latter case, the edges of theexterior plates 6 lie on a support partition 4 and are welded thereto. It will be evident that the number of support partitions 4 and thus also the number of concentric welds between theexterior plates 6 depends on the width of thenozzle 1 and that this width is, among other things, dependent on the diameter of thethruster 1. Thenozzle 1 can also be constructed without anose profile 3 orrear profile 5, and also without support partitions 4. In that case the exterior plate orexterior plates 6 is/are welded directly to theinner wall 2abc. -
Figure 2 shows a metal-spinning machine 7 with acolumn 8 for supporting a revolving table 9 with a horizontal first axis ofrotation 11. The metal-spinning machine has alongitudinal guide 27 along which alongitudinal carriage 23 can be moved in a direction parallel to the first axis ofrotation 11. Across-slide 25 can be moved along thelongitudinal carriage 23 in a direction at right angles to the first axis ofrotation 11. Aswivelling arm 24 is attached to thecross-slide 25 and can be rotated about anaxis 26. Astationary roller support 19 and amovable roller support 20 are attached to theswivelling arm 24, wherein a clampingcylinder 22 can move themovable roller support 20 along aclamping guide 21 towards thestationary roller support 19. Thestationary roller support 19 supports aninner roller 15 that can rotate about a second axis ofrotation 16. Themovable roller support 20 supports anouter roller 17 that can rotate about a third axis ofrotation 18. The second axis ofrotation 16 and the third axis ofrotation 18 are parallel. By moving the movable roller support 20 towards thestationary roller support 19, therollers cylindrical body 2 to be formed by metal-spinning. - Three or
more clamping segments 14 are attached around acoupling piece 12. The clampingsegments 14 can be moved in relation to thecoupling piece 12 by clampingmeans 13, thus forming a clamping bush. The clamping means 13 can clamp the clamping bush within an inner surface of the hollowcylindrical body 2. Thecoupling piece 12 is mounted on asupport bush 10 so that the hollowcylindrical body 2 can rotate about the first axis ofrotation 11. Possibly a quick-release coupling is provided between thecoupling piece 12 and thesupport bush 10 so that the hollowcylindrical body 2 can be easily remounted and be formed at both ends. It is also possible for the clamping bush to be used on a welding manipulator (not shown) for the further assembly of thenozzle 1. -
Figure 2 shows the start of the forming operation of the hollowcylindrical body 2. Movements of thelongitudinal carriage 23 along thelongitudinal guide 27 and of thecross-slide 25 along thelongitudinal carriage 23 allow theinner roller 15 to be positioned on the inner side of the hollowcylindrical body 2. Subsequently, the clampingcylinder 22 forces theoutermost roller 17 against the outer surface of the hollowcylindrical body 2. In order to form the hollow cylindrical body to thefirst profile 2a or thesecond profile 2c, therollers cylindrical body 2 rotates about a first axis ofrotation 11, so that theinner roller 15 and theouter roller 17 form a helical path along the hollowcylindrical body 2. At the same time, the clampinginner roller 15 andouter roller 17 rotate about the second axis ofrotation 16 and the third axis ofrotation 18, and the second axis ofrotation 16 and the third axis ofrotation 18 rotate about theaxis 26. Seefigures 3a and 3b for the various stages of this operation.Figure 3c shows the forming of the second rim of the hollowcylindrical body 2 after thecoupling piece 12 is positioned with the other side on thesupport bush 10. - Preferably the
inner roller 15 and theouter roller 17 are clamped against and moved along the hollowcylindrical body 2 in such a way that the desiredfirst profile 2a or thesecond profile 2c are formed in one go. If necessary, the operation can be repeated a number of consecutive times, whereby account is taken of the fact that the plate thickness t' becomes thinner by rolling therollers cylindrical body 2 and possibly also increases the total width of the hollowcylindrical body 2. -
Figure 4 shows the beginning of the assembly of theinner ring 2abc with the various components to form thenozzle 1.Figures 5 and6 show the successive stages during the assembly andfigure 7 shows thenozzle 1 when this is ready to be mounted to a ship.Figures 4, 5 and6 show a schematic view of the clampingsegments 14 as can be applied when assembling thenozzle 1, by mounting this together with the clampingsegments 14 to a welding manipulator (not shown). Afirst transition 28 indicates the transition of thefirst profile 2a to thecylindrical part 2b of theinner wall 2abc, asecond transition 29 indicates the transition of thesecond profile 2c with thecylindrical part 2b. - As shown in
figure 4 , the longitudinal partitions are first placed on the outer circumference of theinner wall 2abc.Longitudinal partitions 30 of a connecting chamber and acentral partition 31 of the connecting chamber are positioned parallel to the upper side of theinner wall 2abc and a lowerlongitudinal partition 35 is placed on the underside. The connecting chamber connects the upper side of thenozzle 1 to the underside of the ship. After thelongitudinal partitions central partition 31 are placed in position, thenose profile 3 and therear profile 5 are then mounted by sliding these through therecesses 34 in the longitudinal partitions, after which thepartitions profiles figure 5 , the supporting partitions 4 are then positioned and welded and, as shown infigure 6 , thelateral partitions 32 and dividingpartitions 33 of the connecting chamber are then placed in position and welded.Figure 7 showsnozzle 1 after theexterior plates 6 have been mounted and welded. - The
nozzle 1 is connected to the ship by means of a connecting chamber. It will be evident that this can be implemented in various different ways. - In the embodiment shown, the
inner wall 2abc has acylindrical part 2b. Such acylindrical part 2b enables a good cooperative operation between the screw propeller and thenozzle 1. Thiscylindrical part 2b can also be very short or not be present at all.
Claims (11)
- Method for producing a nozzle (1) with an inner wall (2abc) for guiding a flow of water through a screw propeller, wherein the inner wall has a first profile (2a) on the one side and on the other side possibly also a second profile (2c), characterized in that the inner wall of the nozzle is formed from a hollow cylindrical body (2) by rolling out plates with an approximate thickness (t) of the inner wall to the radius of the inner wall and by welding the plates to form the hollow cylindrical body and by subsequently spinning the one side of the hollow cylindrical body by means of plastic deformation or spinning to form the first profile and, if required also the other side of the hollow cylindrical body by means of plastic deformation or spinning to produce the second profile.
- Method according to claim 1, wherein said plates have approximately the same width as the inner wall (2abc).
- Method according to claim 1 or 2, wherein after forming the inner wall (2abc) one or more concentric supporting ribs (4), a nose profile (3) and/or a rear profile (5) are welded to the outer side of the inner wall of the nozzle (1), after which the outer side of the nozzle is formed by welding curved plates (6) around the outer side of the inner wall of the nozzle to or against the inner wall, the concentric supporting rib(s), the nose profile and/or the rear profile.
- Method according to claim 3, wherein one or more longitudinal partitions (30, 31, 35) are welded to the inner wall (2abc) for mounting the curved plates (6) and the ends of the curved plates are welded to or against the longitudinal partitions.
- Method according to one of the preceding claims, wherein the hollow cylindrical body (2) is formed by spinning by clamping said hollow cylindrical body to a revolving table (9,10), wherein a rim of the hollow cylindrical body is accessible, after which a clamp with two rollers (15, 17) clasps the wall of the hollow cylindrical body and the hollow cylindrical body is formed to a desired profile (2a, 2c) by rotating said hollow cylindrical body around a first axis of rotation (11), wherein the clamp with two rollers is moved simultaneously towards the accessible rim so that the rollers follow a helical path over the hollow cylindrical body and wherein possibly the clamp with the rollers rotates around a second axis of rotation (26) that is at right angles to the first axis of rotation.
- Method according to claim 5, wherein the first profile (2a) and/or the second profile (2c) is formed in a single or a few metal-spinning operations(s).
- Method according to one of the preceding claims, wherein a clamping bush (12,13) is placed within the hollow cylindrical body (2) during the metal-spinning operation, said clamping bush also being placed in position on the revolving table (9, 10) for one or for both metal-spinning operations.
- Nozzle for guiding a flow of water through a screw propeller, comprising an inner wall (2abc) with a first profile (2a) on the one side of the screw propeller and possibly also a second profile (2c) on the other side of the screw propeller and possibly a cylindrical wall section (2b) at the position of the screw propeller, characterized in that the inner wall forms an axisymmetric or rotationally symmetric part with a central axis with no more than one or several welds in the direction of the central axis.
- Nozzle according to claim 8, wherein the inner wall (2abc) has an approximately constant wall thickness (t).
- Nozzle according to claim 8 or 9, wherein one or several concentric supporting ribs (4) are welded to the inner wall (2abc) on the exterior side, onto which the sides of curved plates (6) of the outer wall are welded with a concentric welding seam.
- Nozzle according to claim 8, 9 or 10, wherein one or more longitudinal partitions (30, 31, 35) are welded onto the inner wall (2abc), onto which and/or against which the ends of the curved plates (6) are welded.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2003642A NL2003642C2 (en) | 2009-10-14 | 2009-10-14 | METHOD FOR MAKING A BEAM AND A BEAM. |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2311724A1 true EP2311724A1 (en) | 2011-04-20 |
Family
ID=42176980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10187057A Withdrawn EP2311724A1 (en) | 2009-10-14 | 2010-10-08 | Method for constructing a nozzle and a nozzle |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2311724A1 (en) |
CN (1) | CN102069347A (en) |
BR (1) | BRPI1004175A2 (en) |
MX (1) | MX2010011229A (en) |
NL (1) | NL2003642C2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2384710A1 (en) * | 2009-06-04 | 2012-07-11 | Universidad De Vigo | Conforming machine of closed plates. (Machine-translation by Google Translate, not legally binding) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3604117B1 (en) * | 2018-08-03 | 2020-07-15 | Sealence S.R.L. | Propulsion device with outboard waterjet for marine vehicles |
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GB1070743A (en) * | 1964-04-23 | 1967-06-01 | Burness Corlett & Partners Ltd | Improvements in or relating to propulsion nozzles for ships |
GB1202144A (en) * | 1968-01-23 | 1970-08-12 | Bristowe Buckland Saxton | Improvements in methods for the production of cylindrical flanged casings or reels and in apparatus therefor |
DE3718954A1 (en) * | 1987-06-05 | 1988-12-22 | Uwe Gartmann | Propeller arrangement, in particular for ship propulsion plants |
US5531370A (en) * | 1990-08-14 | 1996-07-02 | Rohrberg; Roderick G. | High-precision sizing, cutting and welding tool system for specialty aerospace alloys |
FR2739831A1 (en) * | 1995-10-11 | 1997-04-18 | Tecimar | Streamlined housing to accelerate or decelerate the effort of a ship's propeller |
NL1004558C2 (en) * | 1996-11-18 | 1998-05-19 | Scheepswerf Van De Giessen B V | Jet-pipe for marine propeller |
EP1129006A1 (en) | 1998-11-09 | 2001-09-05 | Scheepswerf van de Giessen B.V. | Device for propelling ships, and a nozzle used in the device |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1005092B (en) * | 1985-12-29 | 1989-09-06 | 东北重型机械学院 | Dieless spinning machine for seal vessel head driven by hydraulic oil motor |
CN2690071Y (en) * | 2003-10-08 | 2005-04-06 | 苏瑞霆 | Fan work piece screw press |
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2009
- 2009-10-14 NL NL2003642A patent/NL2003642C2/en not_active IP Right Cessation
-
2010
- 2010-10-08 EP EP10187057A patent/EP2311724A1/en not_active Withdrawn
- 2010-10-13 BR BRPI1004175-3A patent/BRPI1004175A2/en not_active IP Right Cessation
- 2010-10-13 CN CN2010105494616A patent/CN102069347A/en active Pending
- 2010-10-13 MX MX2010011229A patent/MX2010011229A/en active IP Right Grant
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GB1070743A (en) * | 1964-04-23 | 1967-06-01 | Burness Corlett & Partners Ltd | Improvements in or relating to propulsion nozzles for ships |
GB1202144A (en) * | 1968-01-23 | 1970-08-12 | Bristowe Buckland Saxton | Improvements in methods for the production of cylindrical flanged casings or reels and in apparatus therefor |
DE3718954A1 (en) * | 1987-06-05 | 1988-12-22 | Uwe Gartmann | Propeller arrangement, in particular for ship propulsion plants |
US5531370A (en) * | 1990-08-14 | 1996-07-02 | Rohrberg; Roderick G. | High-precision sizing, cutting and welding tool system for specialty aerospace alloys |
FR2739831A1 (en) * | 1995-10-11 | 1997-04-18 | Tecimar | Streamlined housing to accelerate or decelerate the effort of a ship's propeller |
NL1004558C2 (en) * | 1996-11-18 | 1998-05-19 | Scheepswerf Van De Giessen B V | Jet-pipe for marine propeller |
EP1129006A1 (en) | 1998-11-09 | 2001-09-05 | Scheepswerf van de Giessen B.V. | Device for propelling ships, and a nozzle used in the device |
EP1129006B1 (en) * | 1998-11-09 | 2005-01-12 | Scheepswerf van de Giessen B.V. | Device for propelling ships, and a nozzle used in the device |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
ES2384710A1 (en) * | 2009-06-04 | 2012-07-11 | Universidad De Vigo | Conforming machine of closed plates. (Machine-translation by Google Translate, not legally binding) |
Also Published As
Publication number | Publication date |
---|---|
MX2010011229A (en) | 2011-05-04 |
CN102069347A (en) | 2011-05-25 |
BRPI1004175A2 (en) | 2013-03-05 |
NL2003642C2 (en) | 2011-04-18 |
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