Title:
SPEED CONTROL DEVICE FOR WATER-JET PROPELLING BOAT
Document Type and Number:
Japanese Patent JPS61241296
Kind Code:
A
Abstract:
PURPOSE:To enable to select a maximum speed as the crew like, by controlling a pressure rise in front of the pump impeller, when the static pressure head in front of the pump impeller comes to a controlled specific value. CONSTITUTION:A bypass route 27 with a bypass valve 28 to reduce the pressure is furnished between the front of an impeller 20 at a water intake duct 14 and the outside of the hull 1. When the static pressure head in front of the impeller 20 comes to more than a specific value, and the bypass valve 28 is released by a control device 29, the water flows out of the hull 1 in the direction of arrow X. In this case, since the water flow is controlled by controlling the head increase which is recovered as a dynamic pressure head of the pump head, and by increasing the pump head, the propelling power does not increase. Therefore, by controlling the pressure rise in front of the impeller 20, a maximum boat speed can be selected as the crew like.
Inventors:
KAWAI MEGUMI
Application Number:
JP8204085A
Publication Date:
October 27, 1986
Filing Date:
April 17, 1985
Export Citation:
Assignee:
KAWASAKI HEAVY IND LTD
International Classes:
B63H11/08; F04D15/00; (IPC1-7): B63H11/08; F04D15/00
Attorney, Agent or Firm:
Namba Kunihide
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