Title:
STEERING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2021/171947
Kind Code:
A1
Abstract:
A steering system (1) mounted in a ship includes: a hydraulic actuator (2) that oscillates a rudder plate (1) via a rudder shaft (12) that passes through the ship bottom; and a pump (41) that discharges an operation oil. A first operation chamber (22) and a second operation chamber (23) of the hydraulic actuator (2) are connected to a switching valve (3) by a pair of supply/discharge lines (44, 45), the switching valve (3) being connected to the pump (41) by a pump line (42). The switching valve (3) includes a spool (31) that is moved by a movement mechanism (5). The movement mechanism (5) is configured so that the movement speed of the spool (31) can be electrically changed.
Inventors:
TANAKA TATSUKI
TANAKA HIDEKI
TANAKA HIDEKI
Application Number:
PCT/JP2021/004064
Publication Date:
September 02, 2021
Filing Date:
February 04, 2021
Export Citation:
Assignee:
KAWASAKI HEAVY IND LTD (JP)
International Classes:
B63H25/08; B63H25/24; B63H25/30
Foreign References:
| CN203372387U | 2014-01-01 | |||
| JP2005090732A | 2005-04-07 | |||
| JP2013107447A | 2013-06-06 | |||
| JPH06156386A | 1994-06-03 | |||
| US5857488A | 1999-01-12 | |||
| JPH0976997A | 1997-03-25 |
Attorney, Agent or Firm:
ARCO PATENT & TRADEMARK ATTORNEYS (JP)
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