1. Flow rate (pumping capacity)
The amount of liquid conveyed by a water pump per unit time is called a meteor. It is represented by the capital letter 9 and is generally used
The volumetric flow rate, the legal primary level is picosecond per second (m3/s), and the commonly used unit for screw pumps in engineering is cubic meters per hour (m3/h) or liters
Per second (I/s), sometimes also measured in mass units of tons per hour (./h) or tons per day (√ d). The flow rate indicates that the water pump has a high working capacity
Small parameters:
2. Head
The initial energy obtained by passing a unit mass (ks) of liquid through a gear pump is the head, represented by the capital letter H in English,
The legal master's degree is in Pascal (Pa) (abbreviated as Pa), and kilopascals (kPM) and megapascals (Mya) are multiples of Pascal; In Cheng Bu
Still, 4 bars of it is converted into rice water (n), 1xnH20; 980665Ih) ①, or use engineering atmospheric pressure, which has also been used in engineering in the past
The kilogram force is measured in square centimeters (k less than cm2).
Head, also known as the increase in specific energy (head) per unit mass of water by a water pump
In the formula, c2- the specific energy of the liquid flowing out of the water pump;
The specific energy of Jl liquid flowing into the water pump.
Head is also a parameter that represents the working capacity of a water pump.
The power transmitted by the motor to the diaphragm pump shaft is called shaft power, which is written in uppercase English letters Chuan Lao
(W) "V kilowatt (kw)" is a unit of multiple in watts. It was commonly used in engineering in the past
735499 I31 British horsepower: 745.700 rating).
The ratio of the effective power of a water pump to the shaft power is called efficiency, represented by the Greek letter v, and is a dimensionality.
Due to the fact that the water pump will not completely (without wasting) transmit the power input from the motor to the water flow, there will inevitably be energy loss inside the water pump
The magnitude of this loss is usually measured in terms of efficiency v. Efficiency reflects the performance of a water pump.
The speed bucket of water pump impeller rotation; Is the rotational speed, measured in revolutions per minute (r/rmn), usually represented by the lowercase English letter n.
The common speed savings of water pumps are 2950 r/min, 1470 √ mM, 970 r/min. Each type of water pump is fixed to rotate in a certain direction
If the actual speed of the water pump is not equal to the design speed, other parameters of the water pump (such as O
H. A, etc., also follows a certain pattern of technological changes.
The speed of a reciprocating pump is usually expressed as the number of reciprocating movements per minute (times/Min) of the piston or plunger.