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Internal gear pump of fuel dispensers for sale

Mac 3 2021-12-01 16:19:15

An internal gear pump of fuel dispensers for sale, such as EG1 (, EG3 (, EG5 (, EG6 ( and EG7 (, operates on the same principle as that of an external gear pump of fuel dispensers for sale, but the two interlocking gears are of different sizes with one rotating inside the other. The larger gear (the rotor) is an internal gear, i.e. it has the teeth projecting on the inside. Within this is a smaller external gear (the idler – only the rotor is driven) mounted off-centre. This is designed to interlock with the rotor such that the gear teeth engage at one point. A pinion and bushing attached to the pump casing holds the idler in position. A fixed crescent-shaped partition or spacer fills the void created by the off-centre mounting position of the idler and acts as a seal between the inlet and outlet ports.


As the gears come out of mesh on the inlet side of the fuel dispenser pump, they create an expanded volume. Liquid flows into the cavities and is trapped by the gear teeth as the gears continue to rotate against the pump casing and partition.


The trapped fluid is moved from the inlet to the discharge around the casing.


As the teeth of the gears become interlocked on the discharge side of the fuel dispenser pump, the volume is reduced and the fluid is forced out under pressure.


Internal gear pump of fuel dispensers for sale designs only use spur gears.