CENTRALISED LUBRICATION BY USING EPICYCLIC GEAR TRAIN

Abstract

_{In many industrial applications it is required to drive the actuators, hydraulic cylinders at variable speed this is only possible by variable discharge from a variable displacement pump so it is not feasible to use it. One method employed is to use a pump of higher discharge capacity, but higher capacity means higher cost and higher power consumption hence there is need of special pump system at low cost so that the requirement of variable discharge is met easily without much cost and set up. This paper deals with the design of such pump systems and its calculations.
The pump is characterized by high displacement rate similar to that of piston   pump. While, in case of piston pump the pumping action is due to the reciprocal linear motion of piston. In case of epicyclic gear pump it is due to the relative motion of planet gear. It’s a self-adjusting and no leak mechanical seal and thanks to its sealing method, prevents scoring of the pump drive shaft. Internal gear positive displacement rotary pumps. The flow is generated by two gears: the rotor and idler, one inside the other, divided by a crescent. As the gears rotate, liquid is drawn into the spaces created between the gears and the crescent. When the gears mesh, the liquid is forced out of the pump.}