2-26
DRIVE MOTOR 2.11
The geroter (fig. C3487), is both a fluid displacement
motor and a gear reducer. It provides 8 times (the number
of star points) greater power per revolution than a gear,
vane or piston type motor. This means that 8 times the
greater torque can be developed at one eighth the speed
without further gear reduction.
C3487
C166
Example shown in fig. C166 is one complete star orbit, or
one sixth of the output shaft rotation.The star must travel
through 6 complete orbits for each single rotation of the
output shaft creating a speed reduction of 6 to 1. The use
of 7 fluid power pockets with the 6 to 1 ratio provides 42
fluid power cycles per each complete shaft revolution.
NOTE: Actual star point count is 8. This is only an
example.
8 point star
Fluid pockets (9)
Roller (9)
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