Working principle of KCB gear oil pump

The working principle of KCB gear pump

Structure and working principle of gear oil pump

Main components: pump body, gear...

Gear rod and suction valve, discharge valve.

How it works: When the gear moves from left to right...

Negative pressure is formed in the pump cylinder..

The liquid in the storage tank enters the pump cylinder through the suction valve.

When the gear moves from right to left...

The liquid in the cylinder is squeezed..

Pressure increases...

It is discharged by the discharge valve.

The gear goes back and forth once...

Inhale and expel the liquid once each..

Called a working cycle  this pump is called a single acting pump if the gear round trip once..

Inhale and expel liquid twice each..

It's called a double-acting pump.

The gear moves from one end to the other...

It's called a stroke.

Flow and pressure head of gear pump

The flow rate of the gear pump is independent of the pressure head..

With the size of the pump cylinder, gear stroke and reciprocating times.

The theoretical flow rate of a single acting pump is Qt =Asn

The actual flow rate of the gear pump is smaller than the theoretical flow rate..

And decreases with the increase of the pressure head...

This is due to leakage.

The pressure head of the gear pump has nothing to do with the flow rate of the pump and the geometric size of the pump..

The mechanical strength of the pump, the power of the prime mover and other factors.

Gear pump installation height and flow regulation

Gear oil pump starts without filling liquid...

Because the gear oil pump has self-priming ability..

But the vacuum height also varies with the atmospheric pressure of the pump installation area, the nature of the liquid and the temperature..

Therefore, the installation height of the gear oil pump is also limited.

The flow of gear oil pump can not be adjusted by the valve on the discharge line.

But should adopt the bypass pipe or change the reciprocating number of gear, change the stroke of gear to achieve.

The valve in the discharge line must be opened before the gear pump is started.

The gear of the gear oil pump is connected with the prime mover by the crankshaft of the connecting rod.

Prime mover available motor..

Steam engines can also be used.

Gear oil pump is suitable for conveying high pressure head, small flow and high viscosity liquid..

But it is not suitable for conveying corrosive liquids.

Sometimes driven directly by a steam engine...

Conveying flammable and explosive liquids