Calculation method of pump shaft power and efficiency

H: pump head, unit M, Q flow, unit is M /H within.P as fand, efficiency of pump for the shaft power, the unit KW. is P= P GQH/1000 shaft power within the pump (KW), the P =1000KG/M3, G=9.8
Proportion of units for the KG/M3, the flow of units for the M3/H, head of the unit for the M, 1KG=9.8 Newton
P= specific gravity * flow * head *9.8 Newton /KG
=KG/M3*M3/H*M*9.8 Newton /KG
=9.8 Newton *M/3600 seconds
= Newton *M/367 seconds
= w /367
The above is the calculation of the water power, the power of the shaft and then divided by the efficiency of the following:
Shaft power for the X, motor power for the P, K for the coefficient (the reciprocal efficiency)
Motor power P=X*K (K in the X does not have different values at the same time)
X = 22, K=1.25
22<X = 55, K=1.15
K=1.00 55<X
Pump shaft power calculation formula
Flow H, head Q:M3/H: m H2O, efficiency N:%
Slurry density KG/M3 A
Axis power KW N
N=H*Q*A*G/ (N*3600)
Motor power should also consider the transmission efficiency and safety factor. General direct connection take 1, belt take 0.96, safety factor 1.2
The calculation formula of the efficiency of the pump: Pump effective power and shaft power ratio: within =PE/P
Pump power usually refers to the input power, that is, the original motivation to the pump shaft power, it is also known as the shaft power, with P said.
The effective power is the product of the pump head and mass flow and gravity acceleration.
PE= P G QH (W) or PE= QH/1000 (KW).
P: pump liquid density (KG/M3)
Gamma: pump liquid gamma = P G severe (N/ M3)
G: gravity acceleration (M/S)
The mass flow rate of QM= Q P (T/H or KG/S)
Introduction of pump efficiency
What is the efficiency of the pump? How is the formula?
Ratio of effective power and shaft power of pump. Within =X/P
Pump power usually refers to the input power, that is, the original motivation to the pump shaft power, it is also known as the shaft power, with P said.
The effective power is the product of the pump head and mass flow and gravity acceleration.
PE= G or PE= W QH P QH/1000 (KW).
P: pump liquid density (KG/M3)
Gamma: pump liquid gamma = P G severe (N/ M3)
G: gravity acceleration (M/S)
The quality of QM= Q or KG/S T/H P flow