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M.S.E. – Baripada

Dept. of Automobile Engineering

4^TH Semester, Summer - 2022

RECIPROCATING PUMP

Prepared by :

Er. Sourin Mohanty

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Contents

RECIPROCATING PUMP
CLASSIFICATION
SINGLE ACTING RECIPROCATING PUMP
CONSTRUCTION
SUCTION STROKE
DELIVERY STROKE

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RECIPROCATING PUMP:

A pump which conveys the water from one place to another place with the help of linear motion of piston or plunger.

According to discharge:

Single acting reciprocating pump: Discharge in only one stroke

Double acting reciprocating pump: Discharge in both strokes

According to no. of cylinder

Single Cylinder Pump

Multi Cylinder Pump

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Single acting pump: A single acting pump is one which has one suction valve, delivery valve and one suction and delivery pipe. It suck up the fluid only in one direction and in single stroke called suction stroke.

Double acting pump: A double acting pump is one which has two suction valves, delivery valves and two suction and delivery pipes.

CLASSIFICATION

According to the contact of liquid with piston:

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CLASSIFICATION

According to the number of cylinders

1. Single cylinder pump
Single cylinder pump is one in which their is only cylinder connected to a single shaft. could be a single acting or double acting pump.

2. Double cylinder pump

Double cylinder pump is one which have two cylinder attached to a single shaft.

Separate suction and delivery valve is provided to each cylinder. Crank of the pump is set at an angle of 180 degree.

3. Triple cylinder pump

When the pump has three cylinders attached to a single shaft then the pump is called triple cylinder pump. Crank is set at an angle of 120 degree.

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SINGLE ACTING RECIPROCATING PUMP:

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CONSTRUCTION OF RECIPROCATING PUMP:

(1) Crank: It is mounted on the crank shaft.

It is driven by either I.C. Engine or electric motor.

(2) Connecting Rod: It connects the piston and the crank.

It coverts the rotary motion of crank into reciprocating motion of piston.

(3) Piston: It reciprocates inside the cylinder.

It creates pressure difference inside the cylinder.

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Suction Pipe: It conveys the water from sump to the cylinder.
Delivery Pipe: It conveys the water from cylinder to the discharge tank.
Suction and Delivery Valve: These both valves are “NON-RETURN VALVE”.

o They don’t allow the backward flow of water.

(7) Sump: It is the reservoir of liquid through which water will be pumped.

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SUCTION STROKE:

Initially the crank is at Inner Dead Centre(I.D.C.) and

starts rotating in clockwise direction.

As crank rotates, the piston moves towards right.
Hence vacuum is created on the left side of the piston.
The vacuum causes the delivery valve to be opened and liquid will come from sump to the cylinder.
When crank reaches O.D.C., the piston is on right most position and the cylinder is full of liquid.

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