Vol.22, No.3, 2022, pp. 275–279
UDC:

The seawater hydraulic piston pump has been used in ocean engineering and has become a key power component for underwater equipment due to energy efficiency and being environment friendly. Water hydraulics possesses advantages of low environment pollution, non-flammable, lower operating cost and so on, because it directly uses natural water as working medium instead of traditional mineral oil. It is more flexible in the underwater applications to build an open circuit system directly utilizing the seawater as working a medium and discharging drainage to the open surroundings without needing return hose and reservoir. These special characteristics make it widely used in underwater equipment, such as variable ballast system (VBS), bilge drainage system, high pressure water mist fire suppression system, and high pressure water jet propulsion system. With the missions of underwater equipment becoming increasingly complex and varied, such as military applications, inspection of underwater structures, exploration of unknown environment, oceanographic observations, submarine rescue, underwater animal behaviour research, and so on, underwater equipment with better stability, higher reliability, lower vibration, and noise characteristics is strongly required.

Keywords: seawater pump, hydraulics system, piston, vibration, equipment