 Hello friends, myself, Professor S.P. Mankani, Assistant Professor, Department of Mechanical Engineering, Walchand Institute of Technology, Solapur. Today we are going to study the reciprocating pump. At the end of this lecture, students will be able to understand the working principle of reciprocating pump and also understand the different types of heads are concerned. If the mechanical energy is converted into a stored mechanical energy or pressure energy by sucking the liquid into a cylinder in which a piston is reciprocating backward and forward which exerts the thrust on the liquid and increases its hydraulic energy or pressure energy in the hydraulic machine will be termed as reciprocating pump. So here the different parts we are going to be studying before going actually the working is concerned. So this is the water level from where we are going to be sucking the water is concerned and this we are going to be calling it as a sump level and this one is a suction pipe and this is the suction wall is concerned. So here this is the piston and cylinder arrangement. This is piston and this is the piston rod and here is the cylinder and this is the connecting rod and this one the crank we are going to be considering this as a crank and this is going to be a rotation is going to be taken place through this one. It is initially as shown here as a theta degree and next further calculation of this total stroke length and other things are concerned not required at this stage is concerned when only we are going to be expected to understand the working principle of this particular reciprocating pump is concerned and this is the delivery pipe and where this is the delivery wall is there. So initially, so here this particular level this is a suction head and this is a delivery head. So means suction head is from this particularly sump level up to the center of this particular piston is concerned we are going to be calling this as a suction head means water is available to pump from a level as this suction head and water is expected to delivery the level at a height of this particularly the over a tank is concerned this is we are going to be taken this as a delivery head. So this particularly we are going to be using in most of the application related as in the water this particularly vehicle servicing centers are concerned where the discharge is required as a less with a higher pressure is concerned. So here in this particularly initially supposed to be the piston and cylinder position is here consider this is a position of the piston at the top dead center and this there is a gap is there this much. So here there is already the space available with this particular as a water is already there just you consider this water is there already here which is at a pressure and now so this side also there is a water is there here this side also there is a water is because it is a they are going to be providing here as a outlet is going to be closed at this particular stage and here this wall is closed. So at this stage whenever this piston is going to start moving in the backward direction means this particularly is going to be rotated in this way is concerned here this particular shaft this is connected with the motor electric motor is connected here and whenever it starts rotation this is going to be coming in this direction when it is coming in this direction means the theta angle is going to be increased when it moving in this direction this is a linkage is going to be pulling this particular connecting rod in this backward direction when it pulling this one and automatically this piston rod is going to be coming in the outside the piston sorry outside the cylinder. So when it is moving in this way is concerned this is a backward direction and this is a forward direction when it is moving in the backward direction so that time whatever the available this water is going to be coming in the backside. So that time this particularly the volume is going to be increased here and because of that it is going to be suction is going to be taken place here because of that one this wall is going to be closed and the same time this wall is going to be opened because the space is available here that time it is going to be opening this way when it is a vacuum is going to be created here because of the suction and that time this water is going to be sucked in the upward direction means whenever this piston is coming up to this particular that is a this particular position this is a when it comes in this particular as a backward direction this is top-date center and this is bottom-date center if it is coming at the bottom-date center so that time this completely cylinder is going to be filled up with the water this completely cylinder is going to be filled up with the water. At the same time this wall is also closed and this wall is also called because it does not move further it does not move further so that time is closed particularly it is coming to be this particular position is closed and this is closed means this having a moment from this particular position up to this particular position. When it reaches this particular position, so that time it is there as a bottom dead center. Now it is so now when it is there at this particular position, so that time here it is this position when it starts moving in this direction means this is going to be rotating further in this direction. So that time this particularly piston is going to be pushed in the inward direction, in the forward direction it is going to be pushing it. When it is pushing it that time this door is this particularly suction wall is going to be automatically closed because the pressure is going to be increased here and this wall is going to be closed. When it pressure is going to be increased that time this wall is going to be opened because whatever available pressure at this particular position in the delivery pipe this is lesser pressure than this particularly whatever pressure is here. And because of that when it pushes that time this particular wall is going to be opened and the water does not have space other than moving in this direction means water is going to be moving in the particular delivery pipe is concerned water is going to move in the delivery pipe. So that delivery pipe through this when it is connected as a outside then the water is going to be at a higher pressure it come out here. So means so whenever this is coming from this particularly bottom dead center up to the top dead center it is nothing but a from this particularly end right side end to this particular as a left side end. So when it comes to this particular position that time almost the water whatever it is there at the higher pressure it is going to be delivered through this particular delivery pipe. So then the pressure inside this pipe is going to be increased then this particular pressure is concerned this wall is going to be closed. This wall that is a delivery wall is going to be closed because pressure is this side is more compared with inside this wall is going to be closed. When it closed so that time it is there as a position of this particular point at that time. This is rotated and it is coming to this particular position. Once again this cycle is going to be repeated by moving this one in this direction means once again the suction is going to be taken place in this way. When suction is going to be taking place in this way once again this wall is going to be opened and this wall opened once again there is a entry of water is going to be taken place through this suction pipe inside the cylinder means this cycle is going to be continued in this way. So like this the reciprocating pump is going to be working. So depending upon the requirement they are going to be using the different types of the pumps are considered. In the previous case we have studied as a centrifugal pump and this is particularly studied in this one as the case of reciprocating pump. So now let me tell me that is the major application of reciprocating pumps are considered. Major application of reciprocating pumps are considered. In general practically where exactly you have seen this particular type of pumps are considered. So this particularly pump you have seen in almost all the service centers where you are going to wash your vehicles are considered either two wheeler or four wheeler where you are going to wash the vehicles. There you are going to be observing this type of the pumps are considered that is a reciprocating pump. So here it is a suction head from this particular point to this one. It is the vertical height from the center of the piston of reciprocating pump above the water surface in the tank or the pump from which the water is to be lifted as shown in this particularly figure is considered. This is a suction head and similarly the next one is the delivery head. This is from this particularly center of the piston up to this particular delivery. It is a vertical distance from the center of the piston of the reciprocating pump to the delivery wall up to this particular delivery wall. We are going to be calling this as a delivery head and represented as HD. So just you can see the animation of this particularly working principle. Now here the end now suction is going to be started and because of this wall is opened and this is the bluish color I have shown it here it will reach up to this particularly end. So then it comes in this particular last in this direction. So that time this is a higher pressure this wall is going to be outlet wall. This is a delivery pipe and this is a suction pipe. So now once again you can see that is a suction is going to be taken place and reaching at the end side then it is coming in the forward direction. So that time higher pressure and this water is going to be flowing through this outlet suction completely filled up with the water the cylinder is going to be filled up with the water at the end once again it is coming back the forward stroke the water is going to be flowing through the outlet. This is just concept of how the piston and cylinder is going to be working and this is connecting rod and once again there is a crankshaft and all the that is connected to the motor this side.