As we have discuss classification of reciprocating pump is our last post and now we will discuss the working of two basic types of reciprocating, single and double acting reciprocating pump.
Working of Single acting reciprocating pump
Let us suppose that the pump piston is at the inner dead centre and the crank start to rotate in the clock wise direction. As the crank start to rotate piston start to move toward the outer dead centre. As the piston moves back vacuum is created and force the suction valve to open and suck up the water from the sump into the cylinder of the pump
Now after the suction process is complete, piston of the pump is at the outer dead centre. As crank continuou to rotate the piston of the pump is now force to move toward the inner dead centre and in doing so piston force the water and creates the pressure inside the pump and as the pressure reached a specific value delivery valve is open and water is transfer to the tank.
Working of Double acting reciprocating pump
Piston moving in right direction
let us suppose that the piston is initially at the centre of the cylinder and crank start to rotate on clock wise direction so the piston will move toward the right side and thus vacuume is created at left side of the piston and pressure is created at the right side of the piston. Vacuum at left side force the water to move into the cylinder from the sump and pressure at the right force the water to move up from the delivery pipe in to the tank
Piston moving in left direction
As the crank continuou to rotate, piston after reaching at one end now moves is left direction and so pressure is created at the left side of the piston and vacuum is created on the right side of the pump. Vacuum cause the water to move up in the pump and pressure cause the water in pump to move into the tank.