EP0514123A1 - Jet propulsion unit - Google Patents
Jet propulsion unit Download PDFInfo
- Publication number
- EP0514123A1 EP0514123A1 EP92304251A EP92304251A EP0514123A1 EP 0514123 A1 EP0514123 A1 EP 0514123A1 EP 92304251 A EP92304251 A EP 92304251A EP 92304251 A EP92304251 A EP 92304251A EP 0514123 A1 EP0514123 A1 EP 0514123A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- pump housing
- pump
- surface sections
- ball surface
- hull
- 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.)
- Granted
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H21/00—Use of propulsion power plant or units on vessels
- B63H21/30—Mounting of propulsion plant or unit, e.g. for anti-vibration purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H11/00—Marine propulsion by water jets
- B63H11/02—Marine propulsion by water jets the propulsive medium being ambient water
- B63H11/04—Marine propulsion by water jets the propulsive medium being ambient water by means of pumps
Definitions
- the unit comprises a water pump with a rotor provided in a pump housing and the pump is arranged to connect with the vessel's hull at its stern in such a manner that the pump's water inlet opening communicates with an outlet opening of a water supply channel in the hull.
- a flange of the pump housing can be attached to a flange of the transom stern after the latter flange has been aligned in advance so that, e.g., the plane in which it extends is perpendicular to a straight line between a central point for the flange in this plane and a central point of the motor flywheel.
- a known method for aligning the above-mentioned flange of the transom stern has involved a build-up of the flange surface, e.g., by means of an alignment jig and a laser. This is a complicated, laborious and extremely time-consuming process.
- the object of the improvement according to the invention is to provide a device which is encumbered to a lesser extent by the above-mentioned disadvantages.
- forwards and backwards should be understood to mean forwards and backwards on board the vessel, and in front of and behind should be understood to mean the relative positions for objects on board the vessel, based on these directions.
- a circular opening 2 In the transom stern 1 of a vessel there is provided a circular opening 2. Around the opening is provided a circular flange 3, in which there are arranged a number of through going holes 4. In front of the holes 4 there can be attached to this a number of nuts 5 into which can be screwed respective screws 6, which are inserted in the holes from the back of the flange.
- a water supply channel 10 From a front section of the hull there extends backwards a water supply channel 10 whose rear section is terminated by a flange 11. As with the flange 3, in this flange there is arranged a number of holes 12 for screws 13, which can be inserted from the back into the holes 12 and screwed into the nuts 14 which are attached to the flange in front.
- a tubular or annular element 20 with a rear flange 21 and a front flange 22.
- these flanges 21, 22 there are arranged holes corresponding to the respective holes 4, 12 in the flange 3 of the transom stern and the flange 11 of the water supply channel 10 in order to connect the element 20 to the transom stern 1 and the water supply channel 10 by means of the screws 6 and 13 and the nuts 5 and 14.
- annular element 20 On the radially inward facing side of the annular element 20 there is arranged an inwardly concave ball or spherical zone section 24 with radius R, which extends in a circle along the element, the rear zone section of the ball zone section being further from the element's longitudinal axis than sections located at the front, i.e. the ball centre 48 is located behind a transverse plane which extends through the rearmost section of the ball zone section.
- a water pump 30 with a front and a rear pump housing part 31 and 32 in which a rotor 33 is rotatably provided.
- the front housing part 31 is provided with a rear flange 35 and the rear housing part 32 is provided with a front flange 36.
- these flanges there are arranged in pairs aligned, through going holes.
- the holes in the rear flange 35 can be provided with threads corresponding to the threads of the screws 37, thus rendering the nuts for these superfluous.
- a circular, convex ball or spherical zone section 40 On the radially outer side of the front pump housing 31 there is provided a circular, convex ball or spherical zone section 40 whose ball radius is equal to the ball radius R of the inward facing, concave ball zone section 24 of the annular element 20, the centres 48 of these ball sections coinciding and lying on the axis of rotation 41 of the pump rotor 33.
- the front pump housing 31 and the element 20 preferably define between them a rear and a front annular space 42 and 43 which are arranged to be filled with a liquid, hardenable material 44 via filler openings, which can be closed with threaded plugs 45, circular bands (not shown) or the like.
- This material can, e.g., be a plastic which easily adheres to the sides of the spaces 42, 43 and which does not shrink during hardening, thus ensuring that the front pump housing is firmly attached to the element after the material has hardened.
- annular seals 46, 47 can be provided between these.
- the method for assembly of the unit is as follows.
- the annular element 20 is connected with the water supply channel 10 so as to form a seal, their flanges 22 and 11 being arranged so as to abut each other and the screws 13 inserted in the holes 12 and connected to the nuts 14.
- the ball zone section 40 and the front pump housing 31 are arranged so as to abut the ball zone section 24 of the annular element 20, and the front pump housing 31 is attached to the annular element 20 with some of the screws 6.
- the ball surfaces of the annular element 20 and the front pump housing 31 respectively are continous and form a ball zone section.
- the ball surfaces can be divided into ball surface sections, e.g. ball calottes, which work together in pairs, and that it is sufficient to provide two pairs of synergic ball surface sections located diametrically opposite each other. These must, of course, be large enough to ensure that the ball surface sections of the annular element are not prevented from engaging with the ball surface sections of the front.pump housing during the above-mentioned relative adjustment.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Paper (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
Abstract
Description
- Improvement in jet propulsion units for watercraft, where the unit comprises a water pump with a rotor provided in a pump housing and the pump is arranged to connect with the vessel's hull at its stern in such a manner that the pump's water inlet opening communicates with an outlet opening of a water supply channel in the hull.
- From prior art it is known that a flange of the pump housing can be attached to a flange of the transom stern after the latter flange has been aligned in advance so that, e.g., the plane in which it extends is perpendicular to a straight line between a central point for the flange in this plane and a central point of the motor flywheel.
- A known method for aligning the above-mentioned flange of the transom stern has involved a build-up of the flange surface, e.g., by means of an alignment jig and a laser. This is a complicated, laborious and extremely time-consuming process.
- The object of the improvement according to the invention is to provide a device which is encumbered to a lesser extent by the above-mentioned disadvantages.
- In the following section the invention will be described in more detail with reference to the drawing which illustrates schematically a vertical longitudinal section through an embodiment of a jet propulsion unit according to the invention in which sections are cut away.
- In the following description the terms forwards and backwards should be understood to mean forwards and backwards on board the vessel, and in front of and behind should be understood to mean the relative positions for objects on board the vessel, based on these directions.
- In the transom stern 1 of a vessel there is provided a circular opening 2. Around the opening is provided a circular flange 3, in which there are arranged a number of through going holes 4. In front of the holes 4 there can be attached to this a number of
nuts 5 into which can be screwedrespective screws 6, which are inserted in the holes from the back of the flange. - From a front section of the hull there extends backwards a
water supply channel 10 whose rear section is terminated by aflange 11. As with the flange 3, in this flange there is arranged a number ofholes 12 forscrews 13, which can be inserted from the back into theholes 12 and screwed into thenuts 14 which are attached to the flange in front. - Between the flange 3 of the transom stern 1 and the
flange 11 of thewater supply channel 10 there extends a tubular orannular element 20 with arear flange 21 and afront flange 22. In theseflanges respective holes 4, 12 in the flange 3 of the transom stern and theflange 11 of thewater supply channel 10 in order to connect theelement 20 to the transom stern 1 and thewater supply channel 10 by means of thescrews nuts - On the radially inward facing side of the
annular element 20 there is arranged an inwardly concave ball orspherical zone section 24 with radius R, which extends in a circle along the element, the rear zone section of the ball zone section being further from the element's longitudinal axis than sections located at the front, i.e. theball centre 48 is located behind a transverse plane which extends through the rearmost section of the ball zone section. - To the transom stern there is also attached a
water pump 30 with a front and a rearpump housing part rotor 33 is rotatably provided. - The
front housing part 31 is provided with arear flange 35 and therear housing part 32 is provided with afront flange 36. In these flanges there are arranged in pairs aligned, through going holes. Through the holes there are ledscrews 37 which connect these flanges and the housing parts with one another, the screws being screwed on to nuts (not shown) which are arranged in front of therear flange 35. - Alternatively, the holes in the
rear flange 35 can be provided with threads corresponding to the threads of thescrews 37, thus rendering the nuts for these superfluous. - Moreover, in the
rear flange 35 of thefront pump housing 31 there are providedfurther holes 34 which are adapted to fit thescrews 6, these being arranged to extend through thisflange 35, therear flange 21 of theelement 20 and the flange 3 of the transom stern for the interconnection of these parts. Theholes 34 are counterbored so that they can accommodate the heads of thescrews 6 completely. - On the radially outer side of the
front pump housing 31 there is provided a circular, convex ball orspherical zone section 40 whose ball radius is equal to the ball radius R of the inward facing, concaveball zone section 24 of theannular element 20, thecentres 48 of these ball sections coinciding and lying on the axis ofrotation 41 of thepump rotor 33. - The front pump housing 31 and the
element 20 preferably define between them a rear and a frontannular space hardenable material 44 via filler openings, which can be closed with threadedplugs 45, circular bands (not shown) or the like. This material can, e.g., be a plastic which easily adheres to the sides of thespaces - In order to prevent the
liquid material 44 from penetrating the space between the ball surfaces,annular seals - The method for assembly of the unit is as follows.
- First of all, the
annular element 20 is connected with thewater supply channel 10 so as to form a seal, theirflanges screws 13 inserted in theholes 12 and connected to thenuts 14. - Thereafter, the
ball zone section 40 and thefront pump housing 31 are arranged so as to abut theball zone section 24 of theannular element 20, and thefront pump housing 31 is attached to theannular element 20 with some of thescrews 6. - An assembly jig with a centrally arranged laser is then arranged so as to abut the
rear flange 35 of thefront pump housing 31. After carefully loosening thescrews 6 to enable thefront pump housing 31 to be moved in relation to its annular element, this pump housing is rotated while sliding the ball zone sections on each other, until the laser's light strikes a central point of the motor's flywheel, of the flange of an axle which is connected to this or the like. - Thereafter the
screws 6 are tightened carefully, and while the pump housing is secured by means of these screws in this position in relation to the annular element, the hardenable material is poured into thespaces - After this material has hardened, the remaining connecting
screws 6 are inserted and tightened. - Finally the pump's
rotor 33 andrear housing 32 are installed. - It is stated above that the ball surfaces of the
annular element 20 and thefront pump housing 31 respectively are continous and form a ball zone section. It should, however, be understood that the ball surfaces can be divided into ball surface sections, e.g. ball calottes, which work together in pairs, and that it is sufficient to provide two pairs of synergic ball surface sections located diametrically opposite each other. These must, of course, be large enough to ensure that the ball surface sections of the annular element are not prevented from engaging with the ball surface sections of the front.pump housing during the above-mentioned relative adjustment.
Claims (4)
- Improvement in jet propulsion units for watercraft, where the unit comprises a water pump (30) with a rotor (33) provided in a pump housing (31, 32) and the pump is arranged so as to connect with the vessel's hull at its stern in such a manner that the pump's (30) water inlet opening communicates with an outlet opening of a water supply channel (10) in the hull, characterized in that- the pump housing (31) comprises at least two radially outward facing convex ball surface sections (40) located principally diametrically opposite each other, with equal radius R, and whose common centre (48) lies on the rotor's (33) axis of rotation (41),- the device comprises an element (20) which is arranged to be attached to the hull, and which has radially inward facing, concave ball surface sections (24) which are complementarily adapted in shape to fit the respective ball surface sections (40) of the pump housing (31), and- the respective inward and outward facing ball surface sections (24, 40) are arranged to abut each other when the element (20) is attached to the hull, the pump housing (31) in such an abutment being rotatable about transversal axes in relation to the element (20) for adjustment of the element's (20) and the pump housing's (31) relative position, in that the ball surface sections (24, 40) thereby slide against each other and the pump housing is arranged to be attached to the element (20) after the relative adjustment.
- A device according to claim 1,
characterized in that the element's (20) ball surface sections together constitute a ball zone section (24). - A device according to claim 1 or 2,
characterized in that the pump housing's (31) ball surface sections together constitute a ball or spherical zone section (40). - A device according to one of the preceding claims,
characterized in that the element (20) and the pump housing (31) define between them spaces (42, 43) into which can be poured a hardenable material, which after hardening prevents relative movement of these parts.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO911875A NO172683C (en) | 1991-05-14 | 1991-05-14 | STRAALEDRIFTAGGREGAT |
NO911875 | 1991-05-14 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0514123A1 true EP0514123A1 (en) | 1992-11-19 |
EP0514123B1 EP0514123B1 (en) | 1995-07-19 |
Family
ID=19894149
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92304251A Expired - Lifetime EP0514123B1 (en) | 1991-05-14 | 1992-05-12 | Jet propulsion unit |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0514123B1 (en) |
AT (1) | ATE125219T1 (en) |
DE (1) | DE69203533T2 (en) |
NO (1) | NO172683C (en) |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB567082A (en) * | 1942-06-24 | 1945-01-26 | George Ralph Micuta | Jet propulsion engine |
DE2363318A1 (en) * | 1972-12-21 | 1974-08-08 | Brunswick Corp | DEVICE FOR SEALING A BOAT JET DRIVE |
-
1991
- 1991-05-14 NO NO911875A patent/NO172683C/en not_active IP Right Cessation
-
1992
- 1992-05-12 AT AT92304251T patent/ATE125219T1/en not_active IP Right Cessation
- 1992-05-12 EP EP92304251A patent/EP0514123B1/en not_active Expired - Lifetime
- 1992-05-12 DE DE69203533T patent/DE69203533T2/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB567082A (en) * | 1942-06-24 | 1945-01-26 | George Ralph Micuta | Jet propulsion engine |
DE2363318A1 (en) * | 1972-12-21 | 1974-08-08 | Brunswick Corp | DEVICE FOR SEALING A BOAT JET DRIVE |
Also Published As
Publication number | Publication date |
---|---|
NO911875L (en) | 1992-11-16 |
NO172683C (en) | 1993-08-25 |
DE69203533D1 (en) | 1995-08-24 |
DE69203533T2 (en) | 1996-03-14 |
EP0514123B1 (en) | 1995-07-19 |
NO172683B (en) | 1993-05-18 |
ATE125219T1 (en) | 1995-08-15 |
NO911875D0 (en) | 1991-05-14 |
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