CA1283004C - Propeller device for a vessel - Google Patents
Propeller device for a vesselInfo
- Publication number
- CA1283004C CA1283004C CA000535828A CA535828A CA1283004C CA 1283004 C CA1283004 C CA 1283004C CA 000535828 A CA000535828 A CA 000535828A CA 535828 A CA535828 A CA 535828A CA 1283004 C CA1283004 C CA 1283004C
- Authority
- CA
- Canada
- Prior art keywords
- propeller
- nozzle
- propellers
- rotate
- accordance
- 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.)
- Expired - Fee Related
Links
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
- B63H5/08—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller
- B63H5/10—Arrangements on vessels of propulsion elements directly acting on water of propellers of more than one propeller of coaxial type, e.g. of counter-rotative type
-
- 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
Abstract
Abstract The present invention relates to a propeller device for a vessel. The propeller device comprises two propellers arranged to rotate on a common rotating shaft in opposite directions. The driving power is brought to the essentially horizontal shafts of the propellers by a vertical shaft and an angle gear . The propeller device is equipped with at least one annular propeller nozzle in such a way that at least one of the propellers of the pro-peller device is arranged to rotate within said propeller nozzle.
In a favourable embodiment of the invention the first propeller , the front propeller, is arranged to rotate within the propeller nozzle and the second propeller is arranged as an open propeller.
The propeller device is also favourably so arranged as to be turned around the vertical-shaft for steering the vessel.
In a favourable embodiment of the invention the first propeller , the front propeller, is arranged to rotate within the propeller nozzle and the second propeller is arranged as an open propeller.
The propeller device is also favourably so arranged as to be turned around the vertical-shaft for steering the vessel.
Description
12~3004 The present invention relates to a propeller device for a vessel, which propeller device comprises two propellers arr~mged to rotate on a common rotating shaft in opposite directions, the driving power being brought to the essentially hor:Lzontal shafts of the propellers by a vertical shaft and an ang:Le gear.
Propeller devices equipped with propellers rotating in opposite directions are known in the Prior Art. When two propellers are installed to the same propeller device axially one after the other to rotate in opposite directions, the ma;ority of the energy bound to the whirls of the tra~ling flow of the front propeller can be made use of in the rear propeller with suitable design of the rear propeller. Then the load on both propellers will diminish and the cavitation conditions improve, and the efficiency of the propeller device will increase. As the efficiency will be improved, it is possible to use smaller-diameter propellers with the consequence that a vessel equipped with this klnd of propeller devlce will also be able to operate in shallow waters. These propeller devices cr~ate high thrusts compared with conventional propeller devices with small propeller diameters, on the other hand, due to the high efficiency of the propeller device, high thrusts are attained with lower engine powers than in conventional systems. This will reduce the total costs of the system. Propeller devices with opposite-rotating 2s propellers have earlier been described for instance in US Patents 2 691 356, 2 987 031, 3 094 967 and in the DE Patent Publication 870 655 and in the DE Publication Print 1 145 048.
This kind of propeller device equipped with propellers rotating in opposite directions can be considered exceptionally feasible when both propellers of the propeller device are arranged to the same side of the angle gear of the propeller device, i.e. when both propellers either pull or push. Then the angle gear of the propeller device will not cre-1'~83004 ate flows interfering the operation of the rear propeller;inst:ead, energy bound in the swirls of the trailing flow of the front propeller can be better made use of in the rear propeller.
This arrangement has before been described for instance S in the SE Patent 433 599.
On the other hand, also such an arrangement has been used in the Prior Art in which there is, for changing the flow conditions of the propeller, an annular propeller nozzle around the propeller. A propeller nozzle is usually used to improve the thrust of the propeller particularly in slow speeds, in which the propeller nozzle is used to accelerate the propeller flow in order to provide improved thrust. This kind of arrangement is generally used for instance in tugs. As a propeller nozzle improves the thurst, one may, in association with a propeller device, use a smaller-diameter propeller as compared with the situation that a propeller without a propeller nozzle would be ! used. This kind of propeller device equipped with a propeller nozzle ls formerly described for lnstance in the FI Applicatlon 830 373. A common benefit of the propeller devices described above is that they are simple to make turning so that they can be used for steering the boat.
The present invention provides a new type of propeller device, with which all benefits of the propeller devices known in the Prior Art are attained, but whose efficiency and thrust are essentially better than those of the Prior Art propeller devices.
According to the inventlon the propeller device is equipped with at least one annular propeller nozzle in such a way that at least one of the propellers of the propeller device is arranged to rotate within said propeller nozzle. Among the benefits of the invention when compared with solutions of the Prior Art is that a propeller device in accordance with the invention provides a very high thrust with an essentially smaller propeller diameter than .~, 7., 12~330(~4 what is required in known propeller devices for the same thrust.
In other words, the efficiency of a propeller device in accord-- 2a -X
1283C~04 1 ance with the invention is essentially better than the efficiency of the known systems. Another essential benefit is that a propeller device in accordance with the invention can easily be made turning, 80 that the propeller tevice can be used for steering the vèssel.
The invention will now be described in detail with reference to the figures of the accompanying drawing, which schematically illustrate various embodiments of a propeller device in accordance with the inven-tion.
Figures lA to lC illustrate various embodiments of a propeller device in accordance with the invention, in which propeller devices both propel-lers are of the pushing type.
Pigures 2A to 2D illustrate various embodiments of a propeller device in accortance with the invention, in which which propeller devices one pro-peller is of the pushing type, and the other one is of the pulling type.
First we refer to figures lA to lC, in which a propeller device in ac-2~
cortance with the invention is general}y indicatet with ref. number 10.
Power is brought to the propeller device in a conventional way with a vertical shaft 12, from which it is transferret by an angle gear 11 to the shafts of the propellers 13 ant 14. In figures lA to lC both propel-lers 13 and 14 of the propeller device 10 are of the pushing type. ~he propellers~l3 and 14 are arranged to rotate in opposite rotating direc-tions, for instance as is describet in the SE patent 433 599. The pro-peller shafts are therefore installed coaxially one within the other in such a way the shaft of the first propeller 13 or the front propeller is tubular, ant it is arranget on the shaft of the secont propeller 14 or the rear propeller with bearings 80 as to rotate arount it. As stated above, the shafts of the propellers 13 and 14 are rotatet by means of an angle gear 11 in opposite rotating directions.
The size of the propellers 13 and 14 used in the propeller devices i8 chosen in the known fashion 80 that the diameter of the first propeller .:
, ~ . .
12~33Qo4 1 13 or the front propeller is larger than the diameter of the second pro-peller 14, whereat the point whirls of the front propeller blates do not cause cavitation in the second propeller 14 or the rear propeller. As ~nown, it i8 also feasible to use a larger number of blades in the se-cond propeller 14 or the rear propeller than in the first propeller 13 or the front propeller. The blade number of the ~econd propeller 14 should favourably be selected one higher than the blade number of the first propeller 13, which is very important in order to avoid harmonic vibrations between the blades of propellers 13 and 14. These dimension-lQ ing principles are generally valid for all embodiments of a propeller device in accordance with the invention.
Figure lA illustrates the first embodiment of a propeller device in ac-cordance with the invention. As shown in figure lA, the propeller device ~-~ 10 is equipped with propellers 13 and 14 arranged to rotate in oppositetirections. The propeller 10 is also equipped with a propeller nozzle 15A, which is in the a~ial direction long enough to cover both propel-lers 13 and 14 of the propeller device 10. In other words, the a~ial length of the propeller nozzle 15A is such that both propellers 13 and 2~ 14 are axially located in the area between the leading edge 16A and the trailing edge 17A of the propeller nozzle. The elements with which the - propeller zzle 15A is supported to the propeller device lO itself are not shown in the figure; the supporting elements may be arran8ed in any suitable way.
Figure lB illustrates another embodiment of a propeller device 10 in accordance with the invention. In this embodiment the first propeller 13 or the front propeller i8 arranged within the propeller nozzle 15B, ant the second propeller 14 or the rear propeller is arrsnged as an open propeller. This arrangement may be considiret the most feasible from the point of view of the invention. This is because at the front propeller water flows slower than at the rear propeller, whereat the additional thrust provided by the nozzle is also greater. The location of the first propeller 13 within the propeller nozzle 15B, i.e. a~ially between the leadigg edge 16B and the trailing edge 17B of the propeller nozzle, is ..
~2a~004 favourably 80 selected ehat the first propeller 13 is located beeween the center of the axial length of the propeller nozzle 15B and its trailing edge 17B. By positioning the first propeller 13 within the pro-peller nozzle 15B in this way, the additional thrust provided by the propeller nozzle lSB to the first propeller 13 is at its maximum.
Figure lC illustraees another alternative embodiment of a propeller de-vice 10 in accordance with the invention. In this embodiment the first propeller 13 or the front propeller is arranged as an open propeller and 1Q the second propeller 14 or the rear propeller is arranged within ~hepropeller nozzle 15C. At low speeds, an arrangement shown in figure lC
is not as favourable as the embotiment shown in figure lB, but the 801-ution shown in figure lC is feasible at higher speeds. In the embodiment t5 shown in figure lC, the second propeller 14 is installed within the pro-peller nozzle 15C, i.e. axially in the area between the leading edge 16C
ant the trailing etge 17C of the propeller nozzle in such a way that sait propeller 14 is favourably located in the area between the axial center ant the trailing edge 15C of the propeller nozzle 15C. As figure 2~ lA, neither figures lB or lC show the elemer.ts with which the propeller nozzle 15A is supported to the propeller device 10; the supporting el-ements may be arranget in any suitable way.
Figures 2A and 2B show different embodiments of a propeller device 20 in accordance with the invention. In these the first one 23 of the propel-ler3 of the propeller tevice has been arranget to push and and the se-cond one 24 of the prop211ers of the propeller device has been arranged to pull. The power is brought to the propeller device 20 with the verti-cal shaft 22, and the power is further transmitted by angle gear 21 to ~0 the propeller shafts 23 and 24.
Figure 2A shows an alternative embodiment of a propeller device 20 in accordance with the invention. As in the embotiment of Fig. 2A, the first propeller 23 of the propeller device, the pulling front propeller, - 35 is arranged to be an open propeller and the second propeller 23, the pushing rear propeller is arranget within the propeller nozzle 25A. The , ~, ~X~33004 second propeller 24 is a~cially arranged between the leading edge 26A ant the trailing edge 27A in such a way that it i9 favourably located in the range between the center of the axial length of the propeller nozzle 25A
and the trailing edge 27A. With this arrangement all the advantages described above with reference to figures lA to lC are attained.
The embodiment illustrated in Fig. 2B otherwi~e corresponds to the em-bodiment illustrated in Fig. 2A, but in Fig. 2B also the first propeller 23, the pulling front propeller, is arranged within the propeller nozzle 1~ 25B. Therefore, according to this embodiment, two propeller nozzles 25A
and 25B are uset in the propeller device 20. The first propeller 23 is also suitably arranged within the propeller nozzle 25B in such a way that, in the axial direction, it i~ located between the leading edge 26B
and the trailing edge 27B of the propeller nozzle 25B, in the area be-~5 tween the center of the axial length of the nozzle and the trailing edge 27B.
A propeller tevice illustrated in ~ig. 2C differs from those illustrated in figures 2A and 2B 80 that in this embodiment the first propeller 23, 2~
the pulling front propeller, is arranget within the propeller nozzle 25C, whereas the other propeller 24, the pushing rear propeller, is arranged as an open propeller. In this embodiment the first propeller 23 is arranged within the propeller nozzle 23 in the same way a~ in-the previous embodiment, i.e. in such a way that in the a~ial direction the first propeller 23 is locatet between the leading edge 26C ant the - trailing edge 27C of the propeller nozzle 25C, in the area between the center of the a~cial length of the nozzle 25C and the trailing edge 27C.
Figure 2D shows such an embodiment of the invention in which both the first propeller 23 and the second propeller 24 are arranged within the common propeller nozzle 25D. This embotiment is not as favourable a~ the previous ones, as, due to the design of the propeller device 20, the propeller nozzle 25D must inevitably be extremely long. The location of the propellers 23 and 24 within the propeller nozzle 25D is also noc the best possible, as in this embodiment the fir~t propeller 23 will be lX83004 located near the leading edge 26D of other propeller nozzle 25D
whereas the second propeller 24 will be located near the trailing edge 27D of the propeller nozzle.
A design in accordance with the invention may also be s applied otherways than what is illustrated in the figures of the drawing. One possibility is to arrange both propellers of the propeller device to pull. A twin-propeller propeller-nozzle combination may also be applied to conventional power transmission arrangements, in other words when power is brought to the propellers with a "long" propeller shaft. In these cases the power transmission can be arranged for instance so that the power brought to the propellers is divided in the power drive line as near the propellers as possible, with for instance a planetary gear and by using coaxial propeller shafts. This kind of drive line arrangement is yet complex and inconvenient to arrange; therefore using a twin-propeller propeller-nozzle combination is considerably more feasible, and it is easier to arrange in association with propeller devices 10 and 20 illustrated in figures, and particularly in the embodiments Gf Fig. lA to lC, because in these arrangements very short propeller shafts can be used. The propeller devices can also be arranged to turn around the vertical shaft 12, 22 in such a way they can be used for steering the vessel.
.
Propeller devices equipped with propellers rotating in opposite directions are known in the Prior Art. When two propellers are installed to the same propeller device axially one after the other to rotate in opposite directions, the ma;ority of the energy bound to the whirls of the tra~ling flow of the front propeller can be made use of in the rear propeller with suitable design of the rear propeller. Then the load on both propellers will diminish and the cavitation conditions improve, and the efficiency of the propeller device will increase. As the efficiency will be improved, it is possible to use smaller-diameter propellers with the consequence that a vessel equipped with this klnd of propeller devlce will also be able to operate in shallow waters. These propeller devices cr~ate high thrusts compared with conventional propeller devices with small propeller diameters, on the other hand, due to the high efficiency of the propeller device, high thrusts are attained with lower engine powers than in conventional systems. This will reduce the total costs of the system. Propeller devices with opposite-rotating 2s propellers have earlier been described for instance in US Patents 2 691 356, 2 987 031, 3 094 967 and in the DE Patent Publication 870 655 and in the DE Publication Print 1 145 048.
This kind of propeller device equipped with propellers rotating in opposite directions can be considered exceptionally feasible when both propellers of the propeller device are arranged to the same side of the angle gear of the propeller device, i.e. when both propellers either pull or push. Then the angle gear of the propeller device will not cre-1'~83004 ate flows interfering the operation of the rear propeller;inst:ead, energy bound in the swirls of the trailing flow of the front propeller can be better made use of in the rear propeller.
This arrangement has before been described for instance S in the SE Patent 433 599.
On the other hand, also such an arrangement has been used in the Prior Art in which there is, for changing the flow conditions of the propeller, an annular propeller nozzle around the propeller. A propeller nozzle is usually used to improve the thrust of the propeller particularly in slow speeds, in which the propeller nozzle is used to accelerate the propeller flow in order to provide improved thrust. This kind of arrangement is generally used for instance in tugs. As a propeller nozzle improves the thurst, one may, in association with a propeller device, use a smaller-diameter propeller as compared with the situation that a propeller without a propeller nozzle would be ! used. This kind of propeller device equipped with a propeller nozzle ls formerly described for lnstance in the FI Applicatlon 830 373. A common benefit of the propeller devices described above is that they are simple to make turning so that they can be used for steering the boat.
The present invention provides a new type of propeller device, with which all benefits of the propeller devices known in the Prior Art are attained, but whose efficiency and thrust are essentially better than those of the Prior Art propeller devices.
According to the inventlon the propeller device is equipped with at least one annular propeller nozzle in such a way that at least one of the propellers of the propeller device is arranged to rotate within said propeller nozzle. Among the benefits of the invention when compared with solutions of the Prior Art is that a propeller device in accordance with the invention provides a very high thrust with an essentially smaller propeller diameter than .~, 7., 12~330(~4 what is required in known propeller devices for the same thrust.
In other words, the efficiency of a propeller device in accord-- 2a -X
1283C~04 1 ance with the invention is essentially better than the efficiency of the known systems. Another essential benefit is that a propeller device in accordance with the invention can easily be made turning, 80 that the propeller tevice can be used for steering the vèssel.
The invention will now be described in detail with reference to the figures of the accompanying drawing, which schematically illustrate various embodiments of a propeller device in accordance with the inven-tion.
Figures lA to lC illustrate various embodiments of a propeller device in accordance with the invention, in which propeller devices both propel-lers are of the pushing type.
Pigures 2A to 2D illustrate various embodiments of a propeller device in accortance with the invention, in which which propeller devices one pro-peller is of the pushing type, and the other one is of the pulling type.
First we refer to figures lA to lC, in which a propeller device in ac-2~
cortance with the invention is general}y indicatet with ref. number 10.
Power is brought to the propeller device in a conventional way with a vertical shaft 12, from which it is transferret by an angle gear 11 to the shafts of the propellers 13 ant 14. In figures lA to lC both propel-lers 13 and 14 of the propeller device 10 are of the pushing type. ~he propellers~l3 and 14 are arranged to rotate in opposite rotating direc-tions, for instance as is describet in the SE patent 433 599. The pro-peller shafts are therefore installed coaxially one within the other in such a way the shaft of the first propeller 13 or the front propeller is tubular, ant it is arranget on the shaft of the secont propeller 14 or the rear propeller with bearings 80 as to rotate arount it. As stated above, the shafts of the propellers 13 and 14 are rotatet by means of an angle gear 11 in opposite rotating directions.
The size of the propellers 13 and 14 used in the propeller devices i8 chosen in the known fashion 80 that the diameter of the first propeller .:
, ~ . .
12~33Qo4 1 13 or the front propeller is larger than the diameter of the second pro-peller 14, whereat the point whirls of the front propeller blates do not cause cavitation in the second propeller 14 or the rear propeller. As ~nown, it i8 also feasible to use a larger number of blades in the se-cond propeller 14 or the rear propeller than in the first propeller 13 or the front propeller. The blade number of the ~econd propeller 14 should favourably be selected one higher than the blade number of the first propeller 13, which is very important in order to avoid harmonic vibrations between the blades of propellers 13 and 14. These dimension-lQ ing principles are generally valid for all embodiments of a propeller device in accordance with the invention.
Figure lA illustrates the first embodiment of a propeller device in ac-cordance with the invention. As shown in figure lA, the propeller device ~-~ 10 is equipped with propellers 13 and 14 arranged to rotate in oppositetirections. The propeller 10 is also equipped with a propeller nozzle 15A, which is in the a~ial direction long enough to cover both propel-lers 13 and 14 of the propeller device 10. In other words, the a~ial length of the propeller nozzle 15A is such that both propellers 13 and 2~ 14 are axially located in the area between the leading edge 16A and the trailing edge 17A of the propeller nozzle. The elements with which the - propeller zzle 15A is supported to the propeller device lO itself are not shown in the figure; the supporting elements may be arran8ed in any suitable way.
Figure lB illustrates another embodiment of a propeller device 10 in accordance with the invention. In this embodiment the first propeller 13 or the front propeller i8 arranged within the propeller nozzle 15B, ant the second propeller 14 or the rear propeller is arrsnged as an open propeller. This arrangement may be considiret the most feasible from the point of view of the invention. This is because at the front propeller water flows slower than at the rear propeller, whereat the additional thrust provided by the nozzle is also greater. The location of the first propeller 13 within the propeller nozzle 15B, i.e. a~ially between the leadigg edge 16B and the trailing edge 17B of the propeller nozzle, is ..
~2a~004 favourably 80 selected ehat the first propeller 13 is located beeween the center of the axial length of the propeller nozzle 15B and its trailing edge 17B. By positioning the first propeller 13 within the pro-peller nozzle 15B in this way, the additional thrust provided by the propeller nozzle lSB to the first propeller 13 is at its maximum.
Figure lC illustraees another alternative embodiment of a propeller de-vice 10 in accordance with the invention. In this embodiment the first propeller 13 or the front propeller is arranged as an open propeller and 1Q the second propeller 14 or the rear propeller is arranged within ~hepropeller nozzle 15C. At low speeds, an arrangement shown in figure lC
is not as favourable as the embotiment shown in figure lB, but the 801-ution shown in figure lC is feasible at higher speeds. In the embodiment t5 shown in figure lC, the second propeller 14 is installed within the pro-peller nozzle 15C, i.e. axially in the area between the leading edge 16C
ant the trailing etge 17C of the propeller nozzle in such a way that sait propeller 14 is favourably located in the area between the axial center ant the trailing edge 15C of the propeller nozzle 15C. As figure 2~ lA, neither figures lB or lC show the elemer.ts with which the propeller nozzle 15A is supported to the propeller device 10; the supporting el-ements may be arranget in any suitable way.
Figures 2A and 2B show different embodiments of a propeller device 20 in accordance with the invention. In these the first one 23 of the propel-ler3 of the propeller tevice has been arranget to push and and the se-cond one 24 of the prop211ers of the propeller device has been arranged to pull. The power is brought to the propeller device 20 with the verti-cal shaft 22, and the power is further transmitted by angle gear 21 to ~0 the propeller shafts 23 and 24.
Figure 2A shows an alternative embodiment of a propeller device 20 in accordance with the invention. As in the embotiment of Fig. 2A, the first propeller 23 of the propeller device, the pulling front propeller, - 35 is arranged to be an open propeller and the second propeller 23, the pushing rear propeller is arranget within the propeller nozzle 25A. The , ~, ~X~33004 second propeller 24 is a~cially arranged between the leading edge 26A ant the trailing edge 27A in such a way that it i9 favourably located in the range between the center of the axial length of the propeller nozzle 25A
and the trailing edge 27A. With this arrangement all the advantages described above with reference to figures lA to lC are attained.
The embodiment illustrated in Fig. 2B otherwi~e corresponds to the em-bodiment illustrated in Fig. 2A, but in Fig. 2B also the first propeller 23, the pulling front propeller, is arranged within the propeller nozzle 1~ 25B. Therefore, according to this embodiment, two propeller nozzles 25A
and 25B are uset in the propeller device 20. The first propeller 23 is also suitably arranged within the propeller nozzle 25B in such a way that, in the axial direction, it i~ located between the leading edge 26B
and the trailing edge 27B of the propeller nozzle 25B, in the area be-~5 tween the center of the axial length of the nozzle and the trailing edge 27B.
A propeller tevice illustrated in ~ig. 2C differs from those illustrated in figures 2A and 2B 80 that in this embodiment the first propeller 23, 2~
the pulling front propeller, is arranget within the propeller nozzle 25C, whereas the other propeller 24, the pushing rear propeller, is arranged as an open propeller. In this embodiment the first propeller 23 is arranged within the propeller nozzle 23 in the same way a~ in-the previous embodiment, i.e. in such a way that in the a~ial direction the first propeller 23 is locatet between the leading edge 26C ant the - trailing edge 27C of the propeller nozzle 25C, in the area between the center of the a~cial length of the nozzle 25C and the trailing edge 27C.
Figure 2D shows such an embodiment of the invention in which both the first propeller 23 and the second propeller 24 are arranged within the common propeller nozzle 25D. This embotiment is not as favourable a~ the previous ones, as, due to the design of the propeller device 20, the propeller nozzle 25D must inevitably be extremely long. The location of the propellers 23 and 24 within the propeller nozzle 25D is also noc the best possible, as in this embodiment the fir~t propeller 23 will be lX83004 located near the leading edge 26D of other propeller nozzle 25D
whereas the second propeller 24 will be located near the trailing edge 27D of the propeller nozzle.
A design in accordance with the invention may also be s applied otherways than what is illustrated in the figures of the drawing. One possibility is to arrange both propellers of the propeller device to pull. A twin-propeller propeller-nozzle combination may also be applied to conventional power transmission arrangements, in other words when power is brought to the propellers with a "long" propeller shaft. In these cases the power transmission can be arranged for instance so that the power brought to the propellers is divided in the power drive line as near the propellers as possible, with for instance a planetary gear and by using coaxial propeller shafts. This kind of drive line arrangement is yet complex and inconvenient to arrange; therefore using a twin-propeller propeller-nozzle combination is considerably more feasible, and it is easier to arrange in association with propeller devices 10 and 20 illustrated in figures, and particularly in the embodiments Gf Fig. lA to lC, because in these arrangements very short propeller shafts can be used. The propeller devices can also be arranged to turn around the vertical shaft 12, 22 in such a way they can be used for steering the vessel.
.
Claims (8)
1. A propeller device for a vessel, which propeller device comprises two propellers arranged to rotate on a common rotating shaft in opposite directions, the driving power being supplied to essentially horizontal shafts of the propellers by a vertical shaft and an angle gear, and at least one annular pro-peller nozzle, at least one of the propellers being arranged to rotate within said propeller nozzle.
2. A propeller device in accordance with claim 1, in which a front propeller is arranged to rotate within a propeller nozzle, and a rear propeller is an open propeller.
3. A propeller device in accordance with claim 1, in which a front propeller is an open propeller nozzle, and a rear propeller is arranged to rotate within the propeller nozzle.
4. A propeller device in accordance with claim 1, 2 or 3, in which the propeller arranged to rotate within the propeller nozzle is, in the axial direction, arranged within the propeller nozzle between the center of the axial length of the nozzle and a trailing edge.
5. A propeller device in accordance with claim 1, in which both the front and rear propeller are arranged within a propeller nozzle.
6. A propeller device in accordance with claim 5, in which the propellers are arranged within a common propeller nozzle.
7. A propeller device in accordance with claim 5, in which there is a separate propeller nozzle for both propellers.
8. A propeller device in accordance with claim 1, 2 or 3, which is arranged to be turned around said vertical shaft for steering the vessel.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FI861798A FI79991C (en) | 1986-04-29 | 1986-04-29 | PROPELLERANORDNING FOER ETT FARTYG. |
| FI861798 | 1986-04-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1283004C true CA1283004C (en) | 1991-04-16 |
Family
ID=8522528
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000535828A Expired - Fee Related CA1283004C (en) | 1986-04-29 | 1987-04-28 | Propeller device for a vessel |
Country Status (9)
| Country | Link |
|---|---|
| JP (1) | JPS62273194A (en) |
| CN (1) | CN1010849B (en) |
| CA (1) | CA1283004C (en) |
| DE (1) | DE3713993A1 (en) |
| FI (1) | FI79991C (en) |
| GB (1) | GB2190344B (en) |
| NL (1) | NL193424B (en) |
| NO (1) | NO871764L (en) |
| SE (1) | SE466253B (en) |
Families Citing this family (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6369698U (en) * | 1986-10-27 | 1988-05-11 | ||
| IT212307Z2 (en) * | 1987-07-01 | 1989-07-04 | Akzo Srl | PROPULSOR FOR COUNTER-ROTATING PROPELLER BOATS EQUIPPED WITH A CAPE |
| DE3839967A1 (en) * | 1988-10-20 | 1990-04-26 | Mayer Helmut | Torque force converter |
| FR2678891B1 (en) * | 1991-07-09 | 1996-01-26 | Chaneac Andre | PROPULSION DEVICE FOR VESSELS COMPRISING CONCENTRIC AND CONTRA-ROTATING PROPELLERS AND VESSELS EQUIPPED WITH SUCH A DEVICE. |
| DE4440738A1 (en) * | 1994-11-15 | 1996-05-23 | Schottel Werft | Ship propulsion with a prime mover in the hull and a propeller driven by the prime mover outside the hull |
| EP0935553B1 (en) * | 1996-11-07 | 2001-09-19 | Schottel GmbH & Co KG. | Dual propeller propulsion system for a water craft |
| US6244912B1 (en) * | 2000-03-20 | 2001-06-12 | Electric Boat Corporation | Strut-mounted marine propulsion unit |
| ITMI20051088A1 (en) * | 2005-06-10 | 2006-12-11 | Fb Design Srl | GROUP OF PROPULSION FOR MOTORIZED VESSELS AND CRAFTS MADE THAT MADE |
| JP2008149746A (en) * | 2006-12-14 | 2008-07-03 | Nakashima Propeller Co Ltd | Contra-rotating propeller device for ship |
| EP2305558B1 (en) * | 2009-09-30 | 2013-11-06 | ZF Friedrichshafen AG | Tunnel thrusters for vessels |
| JP2011168075A (en) * | 2010-02-16 | 2011-09-01 | Kawasaki Heavy Ind Ltd | Thruster with duct and vessel including the same |
| JP2012096767A (en) * | 2010-11-05 | 2012-05-24 | Niigata Power Systems Co Ltd | Marine propulsion device |
| CN103192971A (en) * | 2012-01-05 | 2013-07-10 | 张广来 | Cylinder type high pressure jetting water rocket adopting rotary shaft propeller blade |
| EP2955099B1 (en) * | 2013-02-08 | 2018-08-29 | Samsung Heavy Ind. Co., Ltd. | Propulsion device for ship |
| CN103287560B (en) * | 2013-06-27 | 2016-01-20 | 穆军 | A kind of whirlpool oar reversion supercharging waterjet propulsor |
| KR101486060B1 (en) | 2013-09-24 | 2015-01-23 | 옥질표 | propulsion apparatus for ship with contra-rotating propeller |
| EP2944560A1 (en) * | 2014-05-14 | 2015-11-18 | ABB Oy | Propulsion unit |
| CN104787284A (en) * | 2015-04-08 | 2015-07-22 | 浙江海洋学院 | Child-mother coaxial guide pipe wheel propeller |
| CN116353802B (en) * | 2023-05-25 | 2023-09-08 | 合肥倍豪海洋装备技术有限公司 | Inflow auxiliary device and propeller with same |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE113323C (en) * | ||||
| FR899118A (en) * | 1943-06-23 | 1945-05-22 | Propulsion control system for ships and other applications | |
| DE870655C (en) * | 1950-09-02 | 1953-03-16 | Gustav Woehrn | Control device for ships by means of two pivoting propellers |
| US2691356A (en) * | 1950-11-28 | 1954-10-12 | Waterval William | Multiple propeller drive for ships |
| GB873851A (en) * | 1957-08-07 | 1961-07-26 | Pierre Mercier | Apparatus for improving the performance of stream-lined bodies propelled in a fluid |
| DE1145048B (en) * | 1958-06-26 | 1963-03-07 | Willy Dost | Swiveling Z-shaped propeller gear for motor boats |
| US2987031A (en) * | 1959-07-24 | 1961-06-06 | Conrad R Odden | Dual propeller propulsion |
| US3094967A (en) * | 1961-12-12 | 1963-06-25 | Gen Electric | Steerable torque-balanced marine propulsion drive |
| US3487805A (en) * | 1966-12-22 | 1970-01-06 | Satterthwaite James G | Peripheral journal propeller drive |
| NL7013069A (en) * | 1969-09-05 | 1971-03-09 | ||
| US4074652A (en) * | 1976-07-26 | 1978-02-21 | Jackson William M | Steering and propulsion device for watercraft |
| DE2848785C2 (en) * | 1978-11-10 | 1984-07-05 | Willi Becker Ingenieurbüro GmbH, 2000 Hamburg | Rudder propeller with a Kort nozzle for ship propulsion |
| JPS56146492A (en) * | 1980-04-11 | 1981-11-13 | Mitsui Eng & Shipbuild Co Ltd | Ship |
| SE433599B (en) * | 1981-03-05 | 1984-06-04 | Volvo Penta Ab | DOUBLE PROPELLER DRIVE FOR BATAR |
| JPS5984693A (en) * | 1982-11-02 | 1984-05-16 | Mitsubishi Heavy Ind Ltd | Counter-rotating nozzle propeller |
| JPS5992296A (en) * | 1982-11-18 | 1984-05-28 | Mitsubishi Heavy Ind Ltd | Dual inverting nozzle propeller |
| FI65589C (en) * | 1983-02-03 | 1984-06-11 | Hollming Yhtymae Oy | PROPELLERANORDNING FOER ETT FARTYG |
| FI75128C (en) * | 1984-08-22 | 1988-05-09 | Max Gustaf Albert Honkanen | Drive device equipped with counter-rotating propellers. |
-
1986
- 1986-04-29 FI FI861798A patent/FI79991C/en not_active IP Right Cessation
-
1987
- 1987-04-27 DE DE19873713993 patent/DE3713993A1/en active Granted
- 1987-04-28 NL NL8700999A patent/NL193424B/en not_active Application Discontinuation
- 1987-04-28 CA CA000535828A patent/CA1283004C/en not_active Expired - Fee Related
- 1987-04-28 NO NO871764A patent/NO871764L/en unknown
- 1987-04-28 JP JP10615987A patent/JPS62273194A/en active Pending
- 1987-04-28 SE SE8701734A patent/SE466253B/en not_active IP Right Cessation
- 1987-04-29 CN CN 87103246 patent/CN1010849B/en not_active Expired
- 1987-04-29 GB GB8710126A patent/GB2190344B/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| SE8701734L (en) | 1987-10-30 |
| NO871764L (en) | 1987-10-30 |
| GB2190344A (en) | 1987-11-18 |
| GB2190344B (en) | 1990-12-05 |
| DE3713993C2 (en) | 1991-06-06 |
| GB8710126D0 (en) | 1987-06-03 |
| FI861798A (en) | 1987-10-30 |
| FI79991B (en) | 1989-12-29 |
| SE8701734D0 (en) | 1987-04-28 |
| CN1010849B (en) | 1990-12-19 |
| FI861798A0 (en) | 1986-04-29 |
| CN87103246A (en) | 1987-11-11 |
| SE466253B (en) | 1992-01-20 |
| FI79991C (en) | 1990-04-10 |
| NL193424B (en) | 1999-06-01 |
| JPS62273194A (en) | 1987-11-27 |
| DE3713993A1 (en) | 1987-11-05 |
| NO871764D0 (en) | 1987-04-28 |
| NL8700999A (en) | 1987-11-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MKLA | Lapsed |