Hydraulics - Seafish
Hydraulics - Seafish
Hydraulics - Seafish
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29<br />
Pump<br />
61/mln<br />
Relief<br />
Valve<br />
Flow<br />
Control<br />
Distance Moved<br />
in 1 minute<br />
tank<br />
Figure 37.<br />
In Figure 37 a relief valve and a flow control valve are now<br />
included. The flow control valve is reducing the flow to 3 litres/<br />
minute and the actuator has moved a shorter distance in one<br />
minute. So, the actuator moves more slowly. If a motor was used<br />
instead of the cylinder then it would turn more slowly. Also in<br />
Figure 37 you will see that the relief valve is now allowing 3 litres/<br />
minute to pass into the tank.<br />
o<br />
Notice that on the piston rod side of the cylinder the volume<br />
is reduced by the volume of the piston rod, therefore the<br />
return stroke will be faster than the forward stroke.<br />
Now try this SAQ about a hydraulic motor.<br />
<strong>Seafish</strong> Open Learning
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