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reduce radial thrust to the impeller double the liquid velocity through the pump when compared to a single volute reduce hydraulic end thrust provide the effect of multi-staging
hoisting system only hoisting system and luffing system hoisting system and slew and slewing system slewing system only
hydraulic fluid contamination excessive fluid friction turbulent fluid flow fluid pressure surges
a low load on the unit a clogged pump suction strainer a blockage in the line between the pump and hydraulic motor the hydraulic motor turning too fast
act as a shock absorber maintain the stored oil under pressure act as a base or foundation for the power unit eliminate pressure surges in the system
the temperature of the hydraulic fluid the flow rate of the hydraulic fluid the temperature of the cooling water all of the above
Hydraulic pumps Valves Hydraulic cylinders Hydraulic motors
warm-up allows the hydraulic system to become charged with oil warm-up allows the relief valves to be properly tested hydraulic strainers operate only during the warm-up period hydraulic fluid must be at the proper viscosity
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flattening test；hydrauliC test hydrauliC test；flattening test flattening test；hardness test hardness test；hydrauliC test
transmit the rudder angle to the bridge indicator prevent the control linkage from striking the stops when hard over automatically purge all entrained air from the system send hydraulic signals to the receiving unit
regulate the fluid flow in either direction restrict movement of hydraulic fluid in one direction, but allow free movement inthe other direction allow free movement of hydraulic fluid in both directions allow a restricted fluid flow in one direction only
steam plants, electric motors and compressed air diesel engine, hydraulic machinery and compressed air steam plants, electric motors and hydraulic machinery diesel engines, steam plants and hydraulic machinery
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by word by law laudably liberally
flattening test；hydraulic test hydraulic test；flattening test flattening test；hardness test hardness test；hydraulic test
Hydraulic oil Animal oil Light oil Fuel oil
hydraulic pumps valves hydraulic cylinders hydraulic motors
control the back pressure of return oil lock the oil lines under some conditions change the direction of oil flow act as relief valve
provide an area where air can separate from the oil provide an area to separate solid contaminants from the oil act as an oil and water separator absorb shocks occurring in the system
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