JPS57994A - Nozzle apparatus for propelling craft - Google Patents
Nozzle apparatus for propelling craftInfo
- Publication number
- JPS57994A JPS57994A JP7528480A JP7528480A JPS57994A JP S57994 A JPS57994 A JP S57994A JP 7528480 A JP7528480 A JP 7528480A JP 7528480 A JP7528480 A JP 7528480A JP S57994 A JPS57994 A JP S57994A
- Authority
- JP
- Japan
- Prior art keywords
- nozzle
- propeller
- central line
- constituted
- boundary line
- 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
Links
Landscapes
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
PURPOSE: To facilitate the production of a nozzle and improve the propelling efficiency of a screw, in a nozzle surrounding a screw propeller, by locating the blade tip of the propeller in front of the boundary line between the front inner surface and the rear inner surface of the nozzle.
CONSTITUTION: The intersecting point P between the propeller axis central line 4 and the central line 17 of the nozzle outer surface is arranged in front of the propeller center 0, while the intersecting point Q between the propeller axis central line 4 and the central line 18 of the nozzle rear inner surface is arranged in the rear of the propeller center 0. The blade tip of a screw propeller 2 is located in front of the boundary line 22 between the front inner surface and the rear inner surface of the nozzle. The nozzle inner surfaces 20a and 20b in front of the boundary line 22 are constituted so as to be axially symmetric with respect to the propeller axis central line 4. The nozzle inner surfaces 19a and 19b in the rear of the boundary line 22 are constituted so as to be axially symmetric with respect to the nozzle rear inner surface central line 18. Moreover, the nozzle outer surfaces 21a and 21b are constituted so as to be axially symmetric with respect to the nozzle outer surface central line 17. Thereby, production is facilitated, and the gap between the blade tip of the propeller 2 and the inner surface of the nozzle 12 will not change in the circumferential direction. Accordingly, cavitation hardly occurs, so that a nozzle performance of high propelling efficiency can be obtained.
COPYRIGHT: (C)1982,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7528480A JPS57994A (en) | 1980-06-04 | 1980-06-04 | Nozzle apparatus for propelling craft |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7528480A JPS57994A (en) | 1980-06-04 | 1980-06-04 | Nozzle apparatus for propelling craft |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS57994A true JPS57994A (en) | 1982-01-06 |
JPS6341798B2 JPS6341798B2 (en) | 1988-08-18 |
Family
ID=13571764
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP7528480A Granted JPS57994A (en) | 1980-06-04 | 1980-06-04 | Nozzle apparatus for propelling craft |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57994A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6232893U (en) * | 1985-08-13 | 1987-02-26 | ||
US4789302A (en) * | 1987-02-06 | 1988-12-06 | Josip Gruzling | Propeller shroud |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU367004A1 (en) * | 1970-07-14 | 1973-01-23 | '•• INVENTIONS |
-
1980
- 1980-06-04 JP JP7528480A patent/JPS57994A/en active Granted
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SU367004A1 (en) * | 1970-07-14 | 1973-01-23 | '•• INVENTIONS |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6232893U (en) * | 1985-08-13 | 1987-02-26 | ||
US4789302A (en) * | 1987-02-06 | 1988-12-06 | Josip Gruzling | Propeller shroud |
Also Published As
Publication number | Publication date |
---|---|
JPS6341798B2 (en) | 1988-08-18 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JPS57994A (en) | Nozzle apparatus for propelling craft | |
JPS5718596A (en) | Propeller blade with small blade | |
GB1025297A (en) | Improvements in or relating to electrolytic machining | |
GB1325395A (en) | Marine ring propellers | |
JPS52141991A (en) | Ship having tandem type propeller | |
JPS56167593A (en) | Screw propeller for ship | |
JPS5371422A (en) | Vehiclar driving propeller shaft | |
JPS525187A (en) | Propeller or pump blade | |
JPS51146086A (en) | Ship with reduced wave producing resistance | |
JPS52141993A (en) | Jet thrustcontrol means | |
JPS57205299A (en) | Duct propeller | |
JPS5726095A (en) | Shoe piece for ship | |
JPS6451160A (en) | Rotary jetting nozzle for cleaning | |
JPS57107996A (en) | Ducted propeller | |
JPS5264789A (en) | Shape of stern | |
JPS56124586A (en) | Semisubmerged ship | |
JPS52101590A (en) | Ship | |
JPS5425092A (en) | Ship | |
JPS5332594A (en) | Ship | |
JPS5338090A (en) | Method of mounting stern tube for bearing for ship propeller | |
JPS53136296A (en) | Method of replacement of main engine and the like in existing vessel | |
JPS5231492A (en) | Jet propelling device in water | |
JPS5726096A (en) | Propulsion-improving rudder for ship | |
JPS57107995A (en) | Ducted propeller | |
JPS5690797A (en) | Ship |