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Radial
Piston Pump
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This is a still representation
and possibly also a low-resolution image of a fully animated pump.
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Radial Piston Pumps can produce a very smooth flow under extreme pressure.
Generally they are variable-displacement pumps. |
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In variable models, flow rate changes when the shaft holding the rotating
pistons is moved with relation to the casing (in different models either
the shaft or the casing moves.) Output can also be varied by changing the
rotation speed. |
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In this animation if the casing (shown in red) is moved to the left, the
flow rate would decrease to zero. If it is moved even further to the left
the flow would reverse. |
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Input
in this animation is through the two black holes near the center below
the "Pintle" (shown in yellow). Output is through the top two black holes,
above the pintle. Higher pressure areas are indicated with a lighter blue
fluid color. |
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The pistons are usually forced out by springs. They are forced back in,
expelling liquid, by the casing. |
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An odd number of pistons is always used to smooth the hydraulic balance.
These pumps revolve at speeds up to about 1200 RPM. |
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Note similarities to, and differences from, the wobble
pump, swash plate pump, and bent
axis pump. |
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© Copyright
2000 Maintenance Resources, Inc.
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Phone: 812.877.7119
- Fax: 812.877.7116 - E-Mail: info@maintenanceresources.com
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Address: 1983 North Hunt
Street - Terre Haute, IN 47805
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