With a neat sketch, explain principle & working of Geroter pump.

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written 6.9 years ago by

teamques10 ★ 70k

• modified 6.9 years ago

Gerotor pumps operate in the same manner as internal gear pumps.
The inner gear rotor is called a Geroter element. The gerotor element is driven by a prime mover and during theoperation drives outer gear rotor around as they mesh together. The gerotor has one tooth less than the outer internal idler gear. Each tooth of the gerotor is always in sliding contact with the surface of the outer element. The teeth of the two elements engage at just one place to seal the pumping chambers from each other.
On the right-hand side of the pump, shown in Fig. pockets of increasing size are formed, while on the opposite side, pockets decrease in size. The pockets of increasing size are suction pockets and those of decreasing size are discharge pockets.
Therefore, the intake side of the pump is on the right and discharge side on the left.Pumping chambers are formed by the adjacent pair of teeth, which are constantly in contact with the outer element, except for clearance. Refer to Fig as the rotor is turned, its gear tips are accurately machined so that they precisely follow the inner surface of the outer element.
The expanding chambers are created as the gear teeth withdraw.The chamber reaches its maximum size when the female tooth of the outer rotor reaches the top dead center.
During the second half of the revolution, the spaces collapse, displacing the fluid to the outlet port formed at the side plate.

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