2026-04-09Views：
Air compressor flow related nouns
displacement: Displacement is the total working volume formed in one revolution of the air compressor, in m3 or cm3.
Volume flow rate: also known as exhaust volume or nameplate flow rate, refers to the volume value of the gas discharged from the air compressor per unit time under the required rated exhaust pressure. The value needs to be measured at the exhaust end and converted to The intake end (in free state), that is, the volume value at the intake pressure, intake temperature and humidity at the intake, in m3/min.
Air compressor pressure Related Nouns
pressure: It is the acting force of the thermal motion of gas molecules on the wall of the container, which is defined as the acting force of 1 Newton on an area of 1 square meter is 1Pa SC, I .e. 1Pa = 1N/m2,
usually the unit of pressure is Pa, MPa, Bar. (1MPa = 1N/mm2 = 10bar = 103kPa = 106Pa).
Atmospheric pressure: The pressure of the atmosphere on the earth's surface is called atmospheric pressure. At 45 ° north latitude and a temperature of 15 ° C, the force of the atmosphere on 1 square meter of sea level is 1.013 × 105 Newton, which is called 1 standard atmospheric pressure. (1atm (standard atmospheric pressure) = 0.1013MPa = 760mmHg = 10.33 mH2O).
Gometer pressure: The pressure measured at the point where the atmospheric pressure is 0 is the gauge pressure. If the instructions are not marked in the air compressor industry, the pressure usually used is the gauge pressure.
Absolute pressure: The pressure at the point of 0 absolute vacuum is called absolute pressure.
Vacuum degree: measured at 0 point under atmospheric pressure, the degree of gas rarefaction under vacuum is the vacuum degree, and a vacuum pressure gauge is required for its measurement.
gauge pressure = absolute pressure-atmospheric pressure
vacuum = atmospheric pressure-absolute pressure
discharge pressure: Compressor discharge pressure usually refers to the gauge pressure of the gas that finally exits the compressor.
air compressor according to the exhaust pressure can not be classified:
low pressure air compressor-exhaust pressure less than 1.0MPa
medium pressure air compressor-discharge pressure 1.0 ~ 10MPa
high pressure air compressor-exhaust pressure 10 ~ 100MPa
ultra-high pressure air compressor-exhaust pressure greater than 100MPa
air compressor temperature Related Nouns
temperature: A characterization of the average kinetic energy of molecular motion inside an object. The faster the molecular motion, the hotter the object, the higher the temperature, and vice versa.
Celsius temperature: under one atmospheric pressure, the freezing point of pure water is 0 ℃, the boiling point is 100 ℃, the middle is divided into 100 equal parts, each equal part represents 1 ℃.
Fahrenheit temperature: under one atmospheric pressure, the freezing point of pure water is 32 degrees, the boiling point is 212 degrees, and the middle is divided into 180 equal parts, each equal part represents 1 degree, expressed in °F, generally 1 °F = 9/5t 32.
Kelvin temperature: Kelvin temperature is also called absolute temperature, thermodynamic temperature, which is measured by the temperature at which the molecular thermal motion will stop completely in theory as 0 point, which is also called absolute zero, expressed in k, and generally K = t 273.15.
Air compressor motor Related Nouns
rated power: The power marked on the motor nameplate is the output power of the motor at the rated voltage and rated speed. For the motor, it is his shaft power.
Motor efficiency: it is considered from the motor loss, the heating caused by the resistance of the copper wire of the motor, the heating caused by the electromagnetic and eddy current in the iron core, the friction loss and the fan loss are generally expressed by & eta.
Power factor (cos & phi;): It is considered from the power grid and is an important indicator of the power system. The power input from the power grid to the stator of the motor is called apparent power, and its value is the product of voltage and current. The power output by the rotor shaft is called active power. In asynchronous motors, part of the current in the stator is used for rotor excitation, and it does not work, after excitation, it returns to the grid and lags behind a certain phase, and its angle is & phi;, the product of this part of current and voltage is called reactive power.
P = P (apparent) × cos & phi;= 1.732 × I× U× cos & phi;
motor protection grade: IP□□ (the first protection, the solid foreign body intrusion protection; the second protection, the water intrusion protection)
motor insulation level: when the ambient temperature is up to 40 ℃,
class A, maximum allowable motor temperature rise of 65 ℃
class E, maximum allowable motor temperature rise of 80 ℃
class B, maximum allowable motor temperature rise of 90 ℃
class F, maximum allowable motor temperature rise of 115 ℃
class H, allowing maximum motor temperature rise of 140 ℃.
Other Nouns Related to Air Compressor
dew point temperature: under a certain pressure, the saturated air reduces the temperature to reach the saturated state under the condition of keeping the partial pressure of water vapor unchanged, that is, the condensed water is precipitated, and the temperature at this time is the dew point temperature.
Compression ratio: The ratio of the compressor discharge pressure to the absolute pressure of the intake air.
Standard state: the specified suction pressure is 0.1MPa, the temperature is 0 ℃ state can be provided to the user system of air.
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To distinguish whether the screw fan is frequency conversion or fixed frequency, you can check and judge from the following aspects: Check the motor nameplate: Usually, the motor will have a nameplate indicating the model and parameters of the motor. On the nameplate, you can find out whether there is "frequency conversion & rdqu"
The detection of water content in the air of air compressor should be carried out according to national standards or industry standards. Under normal circumstances, in the standard GB/T3853-2018 "Technical Conditions for Air Compressors", the saturated water content of compressed air is 3 when the relative humidity is 100 at 30 ℃.
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