JPS57107995A - Ducted propeller - Google Patents

Ducted propeller

Info

Publication number
JPS57107995A
JPS57107995A JP18230480A JP18230480A JPS57107995A JP S57107995 A JPS57107995 A JP S57107995A JP 18230480 A JP18230480 A JP 18230480A JP 18230480 A JP18230480 A JP 18230480A JP S57107995 A JPS57107995 A JP S57107995A
Authority
JP
Japan
Prior art keywords
propeller
ducts
clearances
circulations
duct
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.)
Pending
Application number
JP18230480A
Other languages
Japanese (ja)
Inventor
Noriyuki Sasaki
Shuichi Nagamatsu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sumitomo Heavy Industries Ltd
Original Assignee
Sumitomo Heavy Industries Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sumitomo Heavy Industries Ltd filed Critical Sumitomo Heavy Industries Ltd
Priority to JP18230480A priority Critical patent/JPS57107995A/en
Publication of JPS57107995A publication Critical patent/JPS57107995A/en
Pending legal-status Critical Current

Links

Landscapes

  • Structures Of Non-Positive Displacement Pumps (AREA)

Abstract

PURPOSE: To prevent a propeller from cavity corrosion by separating a front duct from a rear one at an interval located near the end of the propeller.
CONSTITUTION: Circulations γ1, γ2 are produced around a propeller 1 so that end eddies T, V are directed toward the center axis of the propeller by water flow from clearances 5 and the inner surfaces of respective ducts 3, 4 are prevented from cavitation corrosion. Clearances between the propeller 1 and ducts 3, 4 do not matter by providing gaps 5 so that there is no danger of the contact of the propeller 1 with the inner surface of the duct and the accuracy of installation can be lightened. Further, the circulations in ducts change into γ1, γ2, while the clearances are eliminated by equalizing approximately the outer diameter of the propeller 1 to the inner diameter of the ducts 3, 4 to provide the effect of propulsion higher than conventional one.
COPYRIGHT: (C)1982,JPO&Japio
JP18230480A 1980-12-23 1980-12-23 Ducted propeller Pending JPS57107995A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18230480A JPS57107995A (en) 1980-12-23 1980-12-23 Ducted propeller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18230480A JPS57107995A (en) 1980-12-23 1980-12-23 Ducted propeller

Publications (1)

Publication Number Publication Date
JPS57107995A true JPS57107995A (en) 1982-07-05

Family

ID=16115942

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18230480A Pending JPS57107995A (en) 1980-12-23 1980-12-23 Ducted propeller

Country Status (1)

Country Link
JP (1) JPS57107995A (en)

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