Page 377 - Mechanic Diesel - TT

MECHANIC DIESEL - CITS

Action 2: The piston has reached its maximum displacement. Since it is not moving into or out of the cavity, fluid
is not flowing through the inlet or the outlet.

Action 3: After reaching its maximum position, it is then pushed back into the cavity. During this process, the
piston applies enough pressure to the fluid to overcome the pressure in the outlet of the pump. This pressure
differential pushes the fluid from inside the cavity through the outlet of the pump.

Action 4: The piston reaches its maximum extension into the cavity. Here the volume of the cavity is at a minimum
and fluid is not flowing through the inlet or the outlet. The next action repeats the process, starting again with
action
Components
1 Water reservoir - it is not a part of reciprocating pump, however, it is the main source where from the
reciprocating pump takes the water. It may be a source of other fluid as well.
2 Strainer - It removes all impurities from the liquid to avert chocking the pump.
3 Suction Pipe - It is a pipe by which pump takes the water from the reservoir.

4 Suction Valve - It is a non-return type valve installed on the suction pipe and helps to flow from reservoir to
pump not the vice versa.
6 Cylinder or liquid cylinder - The main component where pressure is increased. It is a hollow cylinder with
coatings. It consists of a piston along with piston rings.
7 Piston or plunger and Piston rod - Piston is directly connected to a rod that is the piston rod. This piston
rod is again connected to the connecting rod. Piston makes the reciprocating motion in forward and backward
motion and creates pressure inside the cylinder.
8 Piston rings - Piston rings are small but one of the vital parts to protect the piston surface as well as cylinder
inner surface from wear and tear. It helps to operate the pump smoothly.
9 Packing - Packing is necessary for all pumps, to have a proper sealing between cylinder and piston. It helps
to stop leakage.

10 Crank and Connecting rod - Crank is connected to the power source and connecting rod makes connection
between crank and piston rod. These component helps to change the circular motion into linear motion.
11 Delivery valve (non-return valve) - Like suction valve delivery valve is also non return type and it helps to
build up the pressure. It protects the pump from back flow.
12 Delivery pipe - It helps to supply the fluid at destination.

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CITS : Automotive - Mechanic Diesel - Lesson 129 - 131