| 摘要 |
A ship steering device in which cavitation in a main hydraulic pump due to a negative pressure region in a hydraulic circuit is prevented to avoid generation of noise caused by the cavitation. The ship steering device (10A) causes a rudder shaft (11) and a rudder plate to pivot. The rudder shaft (11) is pivotably supported by the ship, and the rudder plate is fixed to the rudder shaft (11) and pivots together with the rudder shaft (11). A drive mechanism for causing the rudder shaft (11) to pivot has hydraulic actuators (21A, 21B, 21C, 21D) connected to a hydraulic system (20A). The hydraulic system (20A) has the main hydraulic pump (23) in which the direction of suction and discharge of oil and the flow rate of oil discharged can be changed, a boost pump (26) for maintaining the pressure in the hydraulic system (20A) at a predetermined level, and an accumulator (30) as hydraulic pressure storage means for preventing cavitation in the main hydraulic pump (23) caused by formation of a negative pressure region in the hydraulic system (20A). |
