What is the piston valves function in an axial piston pump?
As the pistons pass over the inlet port, they suck fluid into the piston chamber. As they move over the outlet port, they expel fluid from the piston chamber. The rate at which the pistons are rotating is controlled by the mechanical rotational input on the pump shaft.
How does axial piston pump work?
Axial piston pumps are positive displacement pumps that use multiple cylinders grouped around a central axis. At this point in the rotation, the fluid trapped between the buried end of the piston and the valve plate is expelled to the pump’s discharge port through one of the valve plate’s semi-circular ports.
How is the arrangement of pistons in piston pumps?
An alternative form of piston pump is the axial design of Figure 2.14, where multiple pistons are arranged in a rotating cylinder. The pistons are stroked by a fixed angled plate called the swash plate. Stroking of the pistons is achieved because of the angle between the drive shaft and the rotating cylinder block.
What are the two types of piston pump?
The two main types of piston pump are the lift pump and the force pump. Both types may be operated either by hand or by an engine.
What is pump head calculation?
Total Head = suction Head + Delivery Head Suction Head calculation = Suction vertical Height ( From Foot valve to Pump Centre) + Horizontal pipe line used + No of Bend (or) Elbow used in suction pipe line.
What is the relation between the pressure and the flow rate in a pump?
There is an inverse relationship between pressure and flow. For a given Horsepower, if you increase the pressure, the flow will decrease. If you decrease the pressure, the flow will increase.
What is the impact on flow and pressure when the impeller of a pump is trimmed?
The affinity laws can usually be used up to an impeller trim of 95%, as accepted by the Hydraulic Institute. However, as the impeller is trimmed to lower diameters, a mismatch develops between an impeller and casing flow areas, which makes the pump less efficient.
What are three types of pumps?
There are three basic types of pumps: positive-displacement, centrifugal and axial-flow pumps.