CA1160911A - Bow propeller unit - Google Patents
Bow propeller unitInfo
- Publication number
- CA1160911A CA1160911A CA000389133A CA389133A CA1160911A CA 1160911 A CA1160911 A CA 1160911A CA 000389133 A CA000389133 A CA 000389133A CA 389133 A CA389133 A CA 389133A CA 1160911 A CA1160911 A CA 1160911A
- Authority
- CA
- Canada
- Prior art keywords
- propeller
- bow
- guide blade
- drive
- propeller unit
- 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
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63H—MARINE PROPULSION OR STEERING
- B63H25/00—Steering; Slowing-down otherwise than by use of propulsive elements; Dynamic anchoring, i.e. positioning vessels by means of main or auxiliary propulsive elements
- B63H25/42—Steering or dynamic anchoring by propulsive elements; Steering or dynamic anchoring by propellers used therefor only; Steering or dynamic anchoring by rudders carrying propellers
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
- Actuator (AREA)
Abstract
ABSTRACT OF THE DISCLOSURE
A bow propeller unit for maneuvering of water crafts has a drive housing arranged in a transverse bow pass-age, and a propeller arranged substantially in a radial central plane of the transverse bow passage, wherein the propeller has a hub formed as a one-sidedly open bush sur-rounding the drive motor whose drive shaft is fixedly con-nected with the bottom of the bush, and guide blade rings are axially closely located adjacent the propeller at both axial ends thereof.
MJS:Rjs (212) 687-5068
A bow propeller unit for maneuvering of water crafts has a drive housing arranged in a transverse bow pass-age, and a propeller arranged substantially in a radial central plane of the transverse bow passage, wherein the propeller has a hub formed as a one-sidedly open bush sur-rounding the drive motor whose drive shaft is fixedly con-nected with the bottom of the bush, and guide blade rings are axially closely located adjacent the propeller at both axial ends thereof.
MJS:Rjs (212) 687-5068
Description
9~i l BOW PROPELLER UNIT
I , ~
EU~CKGROUND OF 'rHE lNVEllTIOI~
The present invention`relates to a bow propeller unit for maneuvering of water crafts.
Bow propeller units for maneuvering of water craft are known and widely utilized. A known bow propeller unit has an approximately cylindrical drive housing extending in a transverse passage provided in a bow below a waterline and having two open ends, a propeller arranged substantially in a radial central plane of the transverse passage so that a drive unit is substantially symmetrical to the radial central plane, and two guide blade rings are arranged at both sides of the propeller with one guide blade ring fixedly con-necting a bearing housing for a propeller hub with the drive ~ 15 housing, wherein a driving medium is supplied for driving ;~ the propeller via an opening which is formed in the drive housing and open into a hollow guide blade.
The bow propeller unit of the above-mentioned type is disclosed for example in the German Auslegeschrift 1,123,939. The hub of the propeller in this construction is supported at both sides, and both bearing housings are fixedly connected via the respective guide blade ring with the drive housing. The drive housing is inserted into the transverse passage with roughly constant diameter and rests there with its two ends on supporting rings and secured
I , ~
EU~CKGROUND OF 'rHE lNVEllTIOI~
The present invention`relates to a bow propeller unit for maneuvering of water crafts.
Bow propeller units for maneuvering of water craft are known and widely utilized. A known bow propeller unit has an approximately cylindrical drive housing extending in a transverse passage provided in a bow below a waterline and having two open ends, a propeller arranged substantially in a radial central plane of the transverse passage so that a drive unit is substantially symmetrical to the radial central plane, and two guide blade rings are arranged at both sides of the propeller with one guide blade ring fixedly con-necting a bearing housing for a propeller hub with the drive ~ 15 housing, wherein a driving medium is supplied for driving ;~ the propeller via an opening which is formed in the drive housing and open into a hollow guide blade.
The bow propeller unit of the above-mentioned type is disclosed for example in the German Auslegeschrift 1,123,939. The hub of the propeller in this construction is supported at both sides, and both bearing housings are fixedly connected via the respective guide blade ring with the drive housing. The drive housing is inserted into the transverse passage with roughly constant diameter and rests there with its two ends on supporting rings and secured
- 2 -- ~
`3~
.
. - . . . ` ` ` .
. .
again~t a al displacemen~ by rings arranged at end sides.
The latter mentioned rings can be removed for dismounting of the bow propeller unit. Both guide blade rings have a rounded hub in alignment with the cylindrical hub of the propeller. The bow propeller unit is formed`mirror-symmetrical relative to a radial plane extending through the c,entrally arranged propeller. The drive of the propeller is formed by an electric motor arranged outside of the transverse passage and having a vertical drive shaft which extends through an opening in the periphery of the drive hous-ing and through the hollow guide blade connected therewith so as to drive the propeller hub via a conical gear trans-mission arranged in a bearing housing of the propeller hub;
This construction possesses the disadvantage that the drive motor is located outside of the transverse passage.
Since the space above or below the transverse passage is not sufficient for accommodating the drive means or is occupied by other parts of the ship, such as chain lockers, ballast tanks, and the like, the transverse passage cannot be arranged in the considerably reduced part of the ship's bow, but must be somewhat displaced more to the center of the ship. The action of a bow propeller with given drive current increases with increase of the distance of the transverse passage from the turning point in the ship's center toward a bow or stern of the ship. Thereby a small axial length of _ 3 _ ~ gl'~`
1 the transverse passage is provided, which is ver~v advantage-ous, inasmuch as the transverse passage can be arranged rela-tively deep below the waterline of the ship. Such an arrangement reduces, because of the high water pressure, the danger of cavitation and makes possible higher peripheral speed and thereby also higher thrust power with given struc-~ural dimensions. The above-mentioned desired small a~ial length o the transverse passage cannot be obtained in the construction disclosed in the German Auslegeschrift 1,123,939 not only because the drive motor is arranged outside of the transverse passage, but also because tXe great axial length of the bow propeller unit. This great axial length is first of all reguired because of the two-sided support of the propeller hub and the thereby produced relatively great axial distance of both guide blade rings from the propeller.
Another bow propeller unit is proposed in the German patent 1,456,282 with a relatively shorter axial length of the unit, wherein the propeller lies in the radial central plane of the transverse passage of a bulbous bow of a ship. The propeller hub forms a rotor of an electrical submerged motor formed as an external rotor motor and is supported at both its ends in hoods located symmetrically to the radial central plane. Because of this support, the bow propeller unit is always relatively long. The disadvan-tage of this construction is a very expensive drive. More-~O~il over, no guide blade rings are provided in this con-struction, so that the bow propeller unit possesses additional disadvantages in the sense of flow action.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present inven-tion to provide a bow propeller unit which avoids the disadvantages of the prior art.
More particularly, it is an object of the present invention to provide a bow propeller unit which is axially shorter and can be arranged in a transverse passage with the respectively smaller axial length than in the case of the known bow propeller units.
According to the invention there is provided a bow propeller unit for maneuvering of a water craft having a transverse passage extending in a bow below a waterline and having a radial central plane and two open ends, the bow propeller unit comprising a drive housing arranged in the transverse passage; a propeller arranged substantially in the radial central plane of the transverse passage and having a hub and an axis extending in the direction of the transverse passage; two guide blade elements arranged at opposite axial ends of said propeller; a bearing housing for said hub of said propeller and being fixedly connected with said drive housing by one of said guide blade elements; means for supplying a driving medium to said propeller and including one hollow guide blade provided on one of said guide blade elements and an opening pro-vided in said drive housing and communicating with said one hollow blade; and a drive motor for said propeller supplied with the driving medium, said hub of said propeller being supported in a overhung manner and formed as a one-sided open bush surrounding said drive motor and having a bottom, said drive motor having a drive shaft fixedly connected with said bottom of said bush, and said guide blade elements being axially closely arranged adjacent said propeller.
It is important for the short axial length of the bow propeller unit in accordance with the invention that the propeller unit have a overhung support. Since the propeller hub, moreover, completely overlaps the drive motor, the - 5a -c~
.
l mirror-symmetrical construction of the bow propeller unit relative to the propeller can be maintained despite the one-sided support. This is of great importance for bow propellers controllable in their rotation directions.
Because of the inventive support, it is further possible to arrange both guide plate rings closel~ aajacent to the p,ropeller so as to obtain a further shortening of the axial length. Since the drive motor in the inventive construction is located inside the propeller hub and not outside of the transverse passage, the short length of the inventive drive aggregate can be completely utilized by selection of a respectively short transverse passage which does not require any appreciable mounting space above or below the transverse passage.
In accordance with another particularly advantage-ous feature of the present invention, the drive motor may be ; formed as a hydraulic motor, and hydraulic conduits for the hydraulic motor may extend through the hollow guide plate.
Suitable conduit coupling means can be provided in the 20~ hydraulic conduits so that the bow propeller unit can be easily mounted or dismounted.
In accordance with still another advantageous feature of the present invention, the hollow guide blade can be provided with a removable cover which allows an access to the open end of the propeller hub formed as the :
`
. ~ `9~ ` "` " ``:"`
1 bush and thereby allows a simple dismounting of the drive motor and a simple inspection of the hydraulic conduits.
In order to further reduce the axial length of the drive aggregate, it is advantageous when the guide blades S are slanted axially inwardly and have an inner contour which is approximately parallel to the outer contour o~ the blades of the propeller. Thereby it is possible that the axial length of the drive housing substantially corresponds to its diameter.
An especially simple and reliable construction is obtained when one of the guide blade rings is formed as a separate structural element and connected with the drive housing advantageously detachably by a plug connection. The transmission of the torque is carried out via the other guide blade ring, which executes the mechanical connection between the bearing housing and the drive housing and com-prises the hollow guide blade.
In order to provide for favorable location of the bow propeller unit, in the sense of fluid mechanics, it is advantageous when both guide blade rings have rounded hubs which are in alignment with the cylindrical propeller hub. The hub of the guide blade ring formed as a separate structural element can overlap the connection between the drive shaft and the propeller hub in an especially advantage-ous manner. The format1on of the guide blade ring as a I
l ¦separate element allows its removal from the drive housing so~
¦as to provide access to the above-mentioned rotary connec-¦tion.
l In order to facilitate the mounting and dismount- ¦
¦ing of the bow propeller unit, it is advantageous in accord- ¦ -ance with a further feature of the present invention to form !
t~e drive housing with a slightly conical outer contour. In ¦such a construction, during insertion of the drive unit into ¦¦the transverse passage or re~oval from the latter, tilting ¦lor clamping is prevented.
¦ The novel features which are considered charac-¦teristic for the invention are set forth in particular in ¦the appended claims. The invention itself, however, both as lto its construction and its method of operation, togethex lwith additional objects and advantages thereof, will be best ¦~understood from the following description of specific embodi-~ments when read in connection with the accompanying drawing.
jl BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a view showing a longitudinal section ¦lof a bow propeller unit in accordance with the present in-¦¦Yention; and FIG.2 is a view showing a section taken along th ~line 2-2 in FIG. 2, wherein a propeller is turned relative ¦¦to the view of FIG. 1 by 45 for the sake of clarity.
11~0911 DESCRIPTION OF TH~ PREFERRED EM13ODIMENTS
A bow propeller unit in accordance with the pre-sent invention is provided for a water craft having a bow wall which is identified by reference numeral 1. A trans-verse passage 2 extends transverse to the longitudinal axis of the water craft in the bow region below the waterline and is open at both its sides. The bow propeller unit is ~
arranged in this transverse passage 2.
The bow propeller unit includes a drive housing 3 which has a somewhat conical outer contour, and a propeller 4 which is surrounded by the drive housing 3. The propeller 4 is located substantially in the radial center plane of the ¦transverse passage 2. The entire bow propeller unit is ~ mirror-symmetrical relative to the above-mentioned radial ;~ 15 central plane. The drive housing 3 is secured against rota-: tion in the transverse passage 2 by a pin 5 or the like.
The propeller 4 has a hub 6 which is formed as a bush with one open end. The hub or bush 6 completely sur-rounds a drive motor 7 which advantageously is formed as a ~; 20 hydraulic motor. The drive motor 7 has a drive shaft 8 which is connected with the bottom 6a of the bush-shaped hub 6 for joint rotation therewith.
The drive motor 7 is firmly supported in a bearing housing 9 which is located concentrically inside the bush-shaped propeller hub 6. The bearing housing 9 is completely : _ g _ :
-` ~ ijO911 1 overlapped by the propeller hub 6 and transit into a guide blade ring 10. The guide blade ring 10 is connected with the drive housing 3 for transmission of the torque.
An opening 11 is provided in the outer surface of the drive ¦ housing 3 and opens into a hollow guide blade 12 of the above-mentloned guide blade ring 10. Hydraulic conduits 13 e~xtend through the hollow guide blade 12 to the drive motor 7. The hollow guide blade 12 has a removable cover 14 which closes the open end of the bearing housing 9 from outside.
A guide blade ring 15 is provided at the right end of the propeller 4, as seen in FIG. 1. The guide blade ring 15 is formed as a separate structural element and is detachably connected with the drive housing 3 via a plug connection 16. Both guide plate rings 10 and 15 have a rounded hub 17 which is in alignment with the cylindrical propeller hub 6. Moreover, the guide blades of both guide blade rings 10 and 15 are inwardly slanted and extend with their inner contour 18 approximately parallel to an outer contour 19 of the blades of the propeller 4.
The drive motor 7 is connected at its end side with the bearing housing 9 by a bolt. A shaft sealing member 20 is further provided, and arranged so as to prevent pene-tration of water into the motor 7 or into the bearing hous-ing 9.
It will be understood that each of the elements 9~11 l described above, or two or more together, may also find a useful application in other types of constructions differing from the types described above.
While the invention has been illustrated and de-scribed as embodied in a bow propeller unit, it is not intended to be limited to the details shown, since various ~odifications and structural changes may be made without departing in any way from the spirit of the present inven-tion. .
Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge,readily adapt it for ~arious applications without omitting features that, from the standpoint of prior art, fairly constitute essential : 15 characteristics of the generic or specific aspects of this invention.
What is claimed as new and desired to be pro-: tected by Letters Patent is set forth in the appended ~ claims:
`3~
.
. - . . . ` ` ` .
. .
again~t a al displacemen~ by rings arranged at end sides.
The latter mentioned rings can be removed for dismounting of the bow propeller unit. Both guide blade rings have a rounded hub in alignment with the cylindrical hub of the propeller. The bow propeller unit is formed`mirror-symmetrical relative to a radial plane extending through the c,entrally arranged propeller. The drive of the propeller is formed by an electric motor arranged outside of the transverse passage and having a vertical drive shaft which extends through an opening in the periphery of the drive hous-ing and through the hollow guide blade connected therewith so as to drive the propeller hub via a conical gear trans-mission arranged in a bearing housing of the propeller hub;
This construction possesses the disadvantage that the drive motor is located outside of the transverse passage.
Since the space above or below the transverse passage is not sufficient for accommodating the drive means or is occupied by other parts of the ship, such as chain lockers, ballast tanks, and the like, the transverse passage cannot be arranged in the considerably reduced part of the ship's bow, but must be somewhat displaced more to the center of the ship. The action of a bow propeller with given drive current increases with increase of the distance of the transverse passage from the turning point in the ship's center toward a bow or stern of the ship. Thereby a small axial length of _ 3 _ ~ gl'~`
1 the transverse passage is provided, which is ver~v advantage-ous, inasmuch as the transverse passage can be arranged rela-tively deep below the waterline of the ship. Such an arrangement reduces, because of the high water pressure, the danger of cavitation and makes possible higher peripheral speed and thereby also higher thrust power with given struc-~ural dimensions. The above-mentioned desired small a~ial length o the transverse passage cannot be obtained in the construction disclosed in the German Auslegeschrift 1,123,939 not only because the drive motor is arranged outside of the transverse passage, but also because tXe great axial length of the bow propeller unit. This great axial length is first of all reguired because of the two-sided support of the propeller hub and the thereby produced relatively great axial distance of both guide blade rings from the propeller.
Another bow propeller unit is proposed in the German patent 1,456,282 with a relatively shorter axial length of the unit, wherein the propeller lies in the radial central plane of the transverse passage of a bulbous bow of a ship. The propeller hub forms a rotor of an electrical submerged motor formed as an external rotor motor and is supported at both its ends in hoods located symmetrically to the radial central plane. Because of this support, the bow propeller unit is always relatively long. The disadvan-tage of this construction is a very expensive drive. More-~O~il over, no guide blade rings are provided in this con-struction, so that the bow propeller unit possesses additional disadvantages in the sense of flow action.
SUMMARY OF THE INVENTION
Accordingly, it is an object of the present inven-tion to provide a bow propeller unit which avoids the disadvantages of the prior art.
More particularly, it is an object of the present invention to provide a bow propeller unit which is axially shorter and can be arranged in a transverse passage with the respectively smaller axial length than in the case of the known bow propeller units.
According to the invention there is provided a bow propeller unit for maneuvering of a water craft having a transverse passage extending in a bow below a waterline and having a radial central plane and two open ends, the bow propeller unit comprising a drive housing arranged in the transverse passage; a propeller arranged substantially in the radial central plane of the transverse passage and having a hub and an axis extending in the direction of the transverse passage; two guide blade elements arranged at opposite axial ends of said propeller; a bearing housing for said hub of said propeller and being fixedly connected with said drive housing by one of said guide blade elements; means for supplying a driving medium to said propeller and including one hollow guide blade provided on one of said guide blade elements and an opening pro-vided in said drive housing and communicating with said one hollow blade; and a drive motor for said propeller supplied with the driving medium, said hub of said propeller being supported in a overhung manner and formed as a one-sided open bush surrounding said drive motor and having a bottom, said drive motor having a drive shaft fixedly connected with said bottom of said bush, and said guide blade elements being axially closely arranged adjacent said propeller.
It is important for the short axial length of the bow propeller unit in accordance with the invention that the propeller unit have a overhung support. Since the propeller hub, moreover, completely overlaps the drive motor, the - 5a -c~
.
l mirror-symmetrical construction of the bow propeller unit relative to the propeller can be maintained despite the one-sided support. This is of great importance for bow propellers controllable in their rotation directions.
Because of the inventive support, it is further possible to arrange both guide plate rings closel~ aajacent to the p,ropeller so as to obtain a further shortening of the axial length. Since the drive motor in the inventive construction is located inside the propeller hub and not outside of the transverse passage, the short length of the inventive drive aggregate can be completely utilized by selection of a respectively short transverse passage which does not require any appreciable mounting space above or below the transverse passage.
In accordance with another particularly advantage-ous feature of the present invention, the drive motor may be ; formed as a hydraulic motor, and hydraulic conduits for the hydraulic motor may extend through the hollow guide plate.
Suitable conduit coupling means can be provided in the 20~ hydraulic conduits so that the bow propeller unit can be easily mounted or dismounted.
In accordance with still another advantageous feature of the present invention, the hollow guide blade can be provided with a removable cover which allows an access to the open end of the propeller hub formed as the :
`
. ~ `9~ ` "` " ``:"`
1 bush and thereby allows a simple dismounting of the drive motor and a simple inspection of the hydraulic conduits.
In order to further reduce the axial length of the drive aggregate, it is advantageous when the guide blades S are slanted axially inwardly and have an inner contour which is approximately parallel to the outer contour o~ the blades of the propeller. Thereby it is possible that the axial length of the drive housing substantially corresponds to its diameter.
An especially simple and reliable construction is obtained when one of the guide blade rings is formed as a separate structural element and connected with the drive housing advantageously detachably by a plug connection. The transmission of the torque is carried out via the other guide blade ring, which executes the mechanical connection between the bearing housing and the drive housing and com-prises the hollow guide blade.
In order to provide for favorable location of the bow propeller unit, in the sense of fluid mechanics, it is advantageous when both guide blade rings have rounded hubs which are in alignment with the cylindrical propeller hub. The hub of the guide blade ring formed as a separate structural element can overlap the connection between the drive shaft and the propeller hub in an especially advantage-ous manner. The format1on of the guide blade ring as a I
l ¦separate element allows its removal from the drive housing so~
¦as to provide access to the above-mentioned rotary connec-¦tion.
l In order to facilitate the mounting and dismount- ¦
¦ing of the bow propeller unit, it is advantageous in accord- ¦ -ance with a further feature of the present invention to form !
t~e drive housing with a slightly conical outer contour. In ¦such a construction, during insertion of the drive unit into ¦¦the transverse passage or re~oval from the latter, tilting ¦lor clamping is prevented.
¦ The novel features which are considered charac-¦teristic for the invention are set forth in particular in ¦the appended claims. The invention itself, however, both as lto its construction and its method of operation, togethex lwith additional objects and advantages thereof, will be best ¦~understood from the following description of specific embodi-~ments when read in connection with the accompanying drawing.
jl BRIEF DESCRIPTION OF THE DRAWING
FIG. 1 is a view showing a longitudinal section ¦lof a bow propeller unit in accordance with the present in-¦¦Yention; and FIG.2 is a view showing a section taken along th ~line 2-2 in FIG. 2, wherein a propeller is turned relative ¦¦to the view of FIG. 1 by 45 for the sake of clarity.
11~0911 DESCRIPTION OF TH~ PREFERRED EM13ODIMENTS
A bow propeller unit in accordance with the pre-sent invention is provided for a water craft having a bow wall which is identified by reference numeral 1. A trans-verse passage 2 extends transverse to the longitudinal axis of the water craft in the bow region below the waterline and is open at both its sides. The bow propeller unit is ~
arranged in this transverse passage 2.
The bow propeller unit includes a drive housing 3 which has a somewhat conical outer contour, and a propeller 4 which is surrounded by the drive housing 3. The propeller 4 is located substantially in the radial center plane of the ¦transverse passage 2. The entire bow propeller unit is ~ mirror-symmetrical relative to the above-mentioned radial ;~ 15 central plane. The drive housing 3 is secured against rota-: tion in the transverse passage 2 by a pin 5 or the like.
The propeller 4 has a hub 6 which is formed as a bush with one open end. The hub or bush 6 completely sur-rounds a drive motor 7 which advantageously is formed as a ~; 20 hydraulic motor. The drive motor 7 has a drive shaft 8 which is connected with the bottom 6a of the bush-shaped hub 6 for joint rotation therewith.
The drive motor 7 is firmly supported in a bearing housing 9 which is located concentrically inside the bush-shaped propeller hub 6. The bearing housing 9 is completely : _ g _ :
-` ~ ijO911 1 overlapped by the propeller hub 6 and transit into a guide blade ring 10. The guide blade ring 10 is connected with the drive housing 3 for transmission of the torque.
An opening 11 is provided in the outer surface of the drive ¦ housing 3 and opens into a hollow guide blade 12 of the above-mentloned guide blade ring 10. Hydraulic conduits 13 e~xtend through the hollow guide blade 12 to the drive motor 7. The hollow guide blade 12 has a removable cover 14 which closes the open end of the bearing housing 9 from outside.
A guide blade ring 15 is provided at the right end of the propeller 4, as seen in FIG. 1. The guide blade ring 15 is formed as a separate structural element and is detachably connected with the drive housing 3 via a plug connection 16. Both guide plate rings 10 and 15 have a rounded hub 17 which is in alignment with the cylindrical propeller hub 6. Moreover, the guide blades of both guide blade rings 10 and 15 are inwardly slanted and extend with their inner contour 18 approximately parallel to an outer contour 19 of the blades of the propeller 4.
The drive motor 7 is connected at its end side with the bearing housing 9 by a bolt. A shaft sealing member 20 is further provided, and arranged so as to prevent pene-tration of water into the motor 7 or into the bearing hous-ing 9.
It will be understood that each of the elements 9~11 l described above, or two or more together, may also find a useful application in other types of constructions differing from the types described above.
While the invention has been illustrated and de-scribed as embodied in a bow propeller unit, it is not intended to be limited to the details shown, since various ~odifications and structural changes may be made without departing in any way from the spirit of the present inven-tion. .
Without further analysis, the foregoing will so fully reveal the gist of the present invention that others can, by applying current knowledge,readily adapt it for ~arious applications without omitting features that, from the standpoint of prior art, fairly constitute essential : 15 characteristics of the generic or specific aspects of this invention.
What is claimed as new and desired to be pro-: tected by Letters Patent is set forth in the appended ~ claims:
Claims (10)
1. A bow propeller unit for maneuvering of a water craft having a transverse passage extending in a bow below a waterline and having a radial central plane and two open ends, the bow propeller unit comprising a drive housing arranged in the transverse passage; a propeller arranged substantially in the radial central plane of the transverse passage and having a hub and an axis extending in the direction of the transverse passage; two guide blade elements arranged at opposite axial ends of said propeller;
a bearing housing for said hub of said propeller and being fixedly connected with said drive housing by one of said guide blade elements; means for supplying a driving medium to said propeller and including one hollow guide blade provided on one of said guide blade elements and an opening provided in said drive housing and communicating with said one hollow blade; and a drive motor for said propeller supplied with the driving medium, said hub of said propeller being supported in a overhung manner and formed as a one-sided open bush surrounding said drive motor and having a bottom, said drive motor having a drive shaft fixedly con-nected with said bottom of said bush, and said guide blade elements being axially closely arranged adjacent said propeller.
a bearing housing for said hub of said propeller and being fixedly connected with said drive housing by one of said guide blade elements; means for supplying a driving medium to said propeller and including one hollow guide blade provided on one of said guide blade elements and an opening provided in said drive housing and communicating with said one hollow blade; and a drive motor for said propeller supplied with the driving medium, said hub of said propeller being supported in a overhung manner and formed as a one-sided open bush surrounding said drive motor and having a bottom, said drive motor having a drive shaft fixedly con-nected with said bottom of said bush, and said guide blade elements being axially closely arranged adjacent said propeller.
2. A bow propeller unit as defined in claim 1, wherein said drive motor is a hydraulic motor, said supply-ing means including hydraulic conduits extending to said hydraulic motor through said one hollow guide blade.
3. A bow propeller unit as defined in claim 1, wherein said one hollow guide blade of said supplying means is provided with a removable cover.
4. A bow propeller unit as defined in claim 1, wherein said propeller has a plurality of blades with a predetermined outer contour, said guide blade elements having a plurality of guide blades which are slanted axially inwardly and have an inner contour parallel to the outer contour of said blades of said propeller.
5. A bow propeller unit as defined in claim 1, wherein said drive housing has a predetermined diameter and an axial length substantially corresponding to said dia-meter.
6. A bow propeller unit as defined in claim 1, wherein the other of said guide blade elements is formed as a separate element and connected with said drive housing.
7. A bow propeller unit as defined in claim 6, wherein said separate element which forms said other guide blade element is detachably connected with said drive hous-ing by a plug connection.
8. A bow propeller unit as defined in claim 1, wherein the hub of said propeller is cylindrical, said guide blade elements having rounded hubs which are in alignment with said cylindrical hub of said propeller.
9. A bow propeller unit as defined in claim 1, wherein said drive housing has an outer contour which has a somewhat conical shape.
10. A bow propeller unit as defined in claim 1, wherein said drive housing is substantially cylindrical.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DEP3042210.7-22 | 1980-11-08 | ||
| DE19803042210 DE3042210A1 (en) | 1980-11-08 | 1980-11-08 | Bow thruster for manoeuvring ship - has propeller with overhung hub enclosing hydraulic motor supplied via hollow vane in guide vane |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1160911A true CA1160911A (en) | 1984-01-24 |
Family
ID=6116308
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000389133A Expired CA1160911A (en) | 1980-11-08 | 1981-10-30 | Bow propeller unit |
Country Status (3)
| Country | Link |
|---|---|
| CA (1) | CA1160911A (en) |
| DE (1) | DE3042210A1 (en) |
| NL (1) | NL186441C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11220319B2 (en) | 2016-11-10 | 2022-01-11 | Kobelt Manufacturing Co. Ltd. | Thruster apparatuses, and methods of operating same |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4505684A (en) * | 1982-12-02 | 1985-03-19 | Holden Joseph T | Thrust tube propulsion system |
| DE3300380A1 (en) * | 1983-01-07 | 1984-07-12 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | UNDERWATER PROPELLER DRIVE |
| FR2613687B1 (en) * | 1987-04-09 | 1991-10-18 | Henri Dutet | MOBILE POWER TRANSMISSION DEVICE WITH TURBINE, OR PROPELLER, AND SUBMERSIBLE OR SEMI-SUBMERSIBLE HYDRAULIC MOTOR FOR VESSELS |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1163352A (en) * | 1915-08-02 | 1915-12-07 | Charles W Linscott | Steering-propeller for vessels. |
| DE1123939B (en) * | 1957-11-30 | 1962-02-15 | Karlstad Mekaniska Ab | Control screw |
| US3370541A (en) * | 1966-01-21 | 1968-02-27 | Fred E. Parsons | Bow thruster |
| DE1756689A1 (en) * | 1968-06-27 | 1970-07-23 | Pleuger Friedrich Wilhelm | Maneuvering aid for ships |
| DE2008515A1 (en) * | 1970-02-24 | 1971-09-16 | Schottel Werft | Transverse thrusters for ships |
| US4208978A (en) * | 1978-12-18 | 1980-06-24 | Eller James D | Lateral thruster for a water vessel |
-
1980
- 1980-11-08 DE DE19803042210 patent/DE3042210A1/en active Granted
-
1981
- 1981-10-30 CA CA000389133A patent/CA1160911A/en not_active Expired
- 1981-11-03 NL NL8104970A patent/NL186441C/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11220319B2 (en) | 2016-11-10 | 2022-01-11 | Kobelt Manufacturing Co. Ltd. | Thruster apparatuses, and methods of operating same |
Also Published As
| Publication number | Publication date |
|---|---|
| NL8104970A (en) | 1982-06-01 |
| NL186441B (en) | 1990-07-02 |
| NL186441C (en) | 1990-12-03 |
| DE3042210C2 (en) | 1988-02-11 |
| DE3042210A1 (en) | 1982-05-27 |
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| Date | Code | Title | Description |
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| MKEX | Expiry |