A piston pump is a type of reciprocating pump that uses one or more reciprocating pistons to move and pressurize fluid. Every piston pump contains three major components: a piston, a crank, and inlet and exit valves. A piston pump is a positive displacement pump.
- The piston is the major source for enabling liquid to flow in and out through the valves. The crank, which is connected to the motor, will rotate, allowing the piston to move back and forth repeatedly. Finally, there will be an inlet and output valve for each piston pump. For piston motion, the pump is linked to a power supply.
- The number of pistons required is determined by the application and pressure requirements.
- To manage the flow as well as the state of the flow, a controlling device is required.
Manual Inflating Pump:
Manual Inflating Pump (MIP) is a piston type pump manufactured at IEIPL for K9 Vajra Tanks and is being supplied to L & T Defence. MIP is a hand operated piston pump so it does not require any external power source. Hydraulic Oil is supplied through the inlet valve and due to the reciprocating action oil is discharged at the outlet valves.
Function of Manual Inflating Pump:
Elevates or depress the equipment barrel manually. CW rotation brings the gun barrel down and CCW rotation makes it go upward. Check valve is used to keep oil pressurized inside the manual hydraulic circuit. By utilizing a Shuttle valve the flow direction of the oil through the outlet parts is changed.
Working of Manual Inflating Pump:
The crank of the Manual Inflating Pump is connected to the Eccentric Shaft. The crank motion is used for pumping the oil out through the outlet ports.
Swash plate mounted onto the shaft alters the movement of the piston causing suction and discharge of the oil inside the block cylinder. The clearance between pistons & the cylinder is a critical parameter controlling the efficiency of the pump. CW rotation of the pump will raise the gun barrel and CCW rotation will lower the same with the help of Gun Elevation / Equilibration Cylinder.
Specifications of Manual Inflating Pump:
- Operating Pressure - 105 kg/cm2
- Backlash - <8°
- Torque - < 27.7 kg cm per 1 rev
- Internal Leakage - < 10cc / min
- External Leakage - < Nil at 210 kg/cm2 for 1 minute
- Oil used for testing – MIL-H-6083
- Oil cleanliness level – NAS 5
