Displacement x/s
Displacement-speed curve of piston
Piston displacement
chamber intake and rear-chamber exhaust
chamber intake and rear-chamber compression
eturn: Exhaust from front chamber and inlet from rear chamber
troke: Exhaust from front chamber and inlet from rear chamber
chamber intake and rear-chamber compression
1 Return: Front2 Return: Front3 Return: Front chamber expansion and rear chamber compression
4 Return: Front chamber expansion and rear chamber intake
5 R
6 S
7 Stroke: Front chamber compression and rear chamber intake
8 Stroke: Front chamber compression and rear chamber expansion
9 Stroke: Front10 Stroke: Front-chamber intake and rear-chamber exhaus
Velocity v/(m/s)
1
2
4
5
6
7
8
9
3
10
Piston speed
(a)
(b)
Fig. 11.18 Speed–displacement curve of piston. a Computational results; b ten working stages
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11 Pneumatic Down-the-Hole Hammer