Title:
THRUST CLEARANCE MEASURING DEVICE, THRUST CLEARANCE MEASURING METHOD, AND MARINE VESSEL
Document Type and Number:
WIPO Patent Application WO/2022/210281
Kind Code:
A1
Abstract:
A marine contra-rotating propeller apparatus (100) comprises: an outer shaft (12) to which a front propeller (1) is mounted; an inner shaft (14) to which a rear propeller (2) is mounted; a contra-rotating thrust bearing (40) through which a thrust force of the front propeller is transmitted to the inner shaft; and a contra-rotating gear device (20) which rotates the outer shaft and the inner shaft in mutually reverse directions. The contra-rotating gear device (20) has an inner-shaft thrust bearing (50) which supports the thrust force of the inner shaft and maintains the axial position of the inner shaft. A thrust clearance measuring device (60) has: an inner shaft position sensor (62) which measures a forward-traveling-time inner-shaft position (F1) and a backward-traveling-time inner-shaft position (R1) in the axial direction of the inner shaft during operation of a marine vessel; and a thrust clearance arithmetic device (66) which calculates a first thrust clearance (C1) of the inner-shaft thrust bearing.
Inventors:
SHIMIZU MASAHIRO (JP)
NAKAIE MASASHI (JP)
NISHIYAMA SAIKI (JP)
NAKAIE MASASHI (JP)
NISHIYAMA SAIKI (JP)
Application Number:
PCT/JP2022/014076
Publication Date:
October 06, 2022
Filing Date:
March 24, 2022
Export Citation:
Assignee:
JAPAN MARINE UNITED CORP (JP)
International Classes:
B63B79/10; B63B81/00; B63H5/10; B63H23/32
Foreign References:
| KR20130125868A | 2013-11-20 | |||
| KR20120135795A | 2012-12-17 | |||
| JP2015523931A | 2015-08-20 | |||
| JP2020147278A | 2020-09-17 | |||
| JP5266542B2 | 2013-08-21 | |||
| JP6532927A |
Attorney, Agent or Firm:
HOTTA Minoru (JP)
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