Hydraulics - Seafish
Hydraulics - Seafish
Hydraulics - Seafish
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47<br />
PUMP<br />
ONE-WAY<br />
VARIABLE OUTPUT<br />
PUMP<br />
ONE-WAY<br />
PUMP<br />
REVERSIBLE<br />
VARIABLE<br />
RESTRICTION<br />
MOTOR<br />
ONE-WAY<br />
MOTOR<br />
REVERSIBLE<br />
Figure 50.<br />
• Pumps and Motors are represented in a very simple way<br />
(see Figure 50). The triangle (A) inside the circle indicates<br />
the direction of oil flow. If they are reversible, then pumps<br />
can deliver to either line and motors can receive pressure<br />
oil from either line.<br />
• An arrow through any symbol indicates that its output of<br />
either speed, flow or pressure is variable.<br />
• An oscillating motor (semi-rotary actuator) provides a<br />
circular motion but only backwards and forwards - not a<br />
complete revolution.<br />
• A cylinder (linear actuator) with a differential rod has a<br />
cylinder rod of larger diameter than normal. This gives the<br />
actuator a faster return stroke but a smaller return force.<br />
n i<br />
Figure 51.<br />
<strong>Seafish</strong> Open Learning
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