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Title:
MARINE-USE CONTRA-ROTATING PROPELLER DEVICE AND SEACRAFT PROVIDED WITH SAME
Document Type and Number:
WIPO Patent Application WO/2022/210280
Kind Code:
A1
Abstract:
A marine-use contra-rotating propeller device (100) is provided with an outer shaft (12), an inner shaft (14), and a drive device (30). The outer shaft has a front propeller (1) mounted onto a rear-end part thereof, and is rotatably supported on a stern tube bearing (16). The inner shaft has a rear propeller (2) mounted onto a rear-end part thereof, and is rotatably supported on contra-rotating bearings (5, 7). A stern-side stern tube bearing seal (40) is provided to the ocean side of the stern tube bearing (16), and seals the space therebetween. A stern-side contra-rotating seal (50) is provided to the ocean side of the stern-side contra-rotating bearing (7), and seals the space therebetween. A seal drain collection device (60) supplies seal air (A) to the stern-side stern tube seal or stern-side contra-rotating seal, and collects drainage (D1, D2) together with the seal air. The invention is furthermore provided with a rotational position sensor (70) for detecting the rotational position of the outer shaft or inner shaft, and a rotational control device (80) for causing the drive device to stop due to a detection signal of the rotational position sensor.

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Inventors:
SHIMIZU MASAHIRO (JP)
NAKAIE MASASHI (JP)
NISHIYAMA SAIKI (JP)
Application Number:
PCT/JP2022/014075
Publication Date:
October 06, 2022
Filing Date:
March 24, 2022
Export Citation:
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Assignee:
JAPAN MARINE UNITED CORP (JP)
International Classes:
F16C17/02; B63H5/10; B63H23/06; B63H23/36; F16C33/74; F16J15/16; F16N31/00
Foreign References:
JP2019093788A2019-06-20
JP2009113578A2009-05-28
JPH07251795A1995-10-03
KR20150074688A2015-07-02
Attorney, Agent or Firm:
HOTTA Minoru (JP)
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