Pump and fan - gear pump working principle

 Gear pump has a pair of meshing gears with each other,usually used as a fuel supply system of power electrical motor pump,as asynchronous motor shown in figure 0-9,1 (driving wheel) on the drive shaft with gear,shaft out motor run capacitor at the end of the outside shell,driven by a prime mover another gear 2 (follower) installed in another shaft,gear rotates,the liquid along the suction tubing 3 into the suction space,up and down along the wall wholesalemotor.blogspot.com are two gear extrusion to the discharge space rendezvous (tooth and tooth meshing before),then into 4 discharge pressure tubing.