Which oil pump is used in stationary diesel engines?

This question was previously asked in
RRB ALP Mechanic Diesel 21 Jan 2019 Official Paper (Shift 1)
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  1. Plunger type
  2. Gear type
  3. Rotary type
  4. Vane type

Answer (Detailed Solution Below)

Option 1 : Plunger type
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Detailed Solution

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Explanation:

Oil pumps:

  • The oil pump is used to pump oil from the oil sump to the oil galleries at a certain pressure.
  • It is located in the crankcase and is driven by the camshaft.

Four types of oil pumps are used:

  • Gear-type oil pump
  • Rotor-type oil pump
  • Vane-type oil pump
  • Plunger-type oil pump

Plunger-type oil pump:

  • In this type of plunger moves up and down in the cylinder.
  • The plunger-type oil pump is used in stationary diesel engines.
  • It is operated by a special eccentric cam.
  • This pump has two non-return ball valves.
  • These valves are spring-loaded balls.
  • One of these is on the suction side.
  • During the upward stroke, the oil is sucked through the valve.
  • During the downward stroke, the non-return valve closes.
  • The other non-return valve which is on the delivery side opens and permits the oil to flow out from the pump.
  • This type of plunger pump is used in medium and high-pressure lubricating systems.

 

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