Chinese Air Compressor The term air compressor is the full name of a air compressor; a machine designed according to the working principle of the volume change of the gas caused by the rotation of the screw, which can The natural air is sucked in and then through several internal processes to complete the work, and finally the compressed air that meets the pressure requirements is discharged. This machine is called screw air compression. Working pressure of air compressor There are many forms of pressure unit. Here we mainly introduce the pressure indicating unit commonly used in screw air compressors. 1 Working pressure, Chinese users often call exhaust pressure. Working pressure refers to the highest pressure of the air discharged from the air compressor; 2 Common working pressure units are: bar or Mpa, 1 bar = 0.1 Mpa; 3 General, the user usually refers to the pressure unit: Kg (kg), 1 bar = 1 Kg.
Air compressor volume flow 1 Volume flow, Chinese users often call the displacement. The volumetric flow rate refers to the amount of gas discharged per unit time of the air compressor under the required exhaust pressure, which is converted into the intake state. 2 The volume flow unit is: m3/min (cubic/min) or L/min (liter/min), 1m3 (cubic) = 1000L (liter); 3 General, common flow units are: m3/min (cubic/ Minutes); 4 Volumetric flow is also known as displacement or nameplate flow in China. The power of the air compressor is 1 general. The power of the air compressor refers to the nameplate power of the matched drive motor or diesel engine; 2 The unit of power is: KW (kilowatt) or HP (pound/horsepower), 1KW ≈ 1.333HP . Selection of working pressure (exhaust pressure): When the user is ready to purchase the air compressor, first determine the working pressure required for the gas end, plus the allowance of 1-2 bar, then select the pressure of the air compressor. (The remaining amount is the pressure loss considering the distance from the air compressor installation site to the actual gas end pipeline, and the pressure margin is appropriately considered according to the length of the distance between 1-2 bar). Of course, the size of the pipe diameter and the number of turning points are also factors affecting the pressure loss. The larger the pipe diameter and the smaller the turning point, the smaller the pressure loss; otherwise, the pressure loss is greater. Therefore, when the distance between the air compressor and each air end line is too far, the diameter of the main line should be properly enlarged. If the environmental conditions meet the installation requirements of the air compressor and the working conditions permit, it can be installed near the air end. Selection of volume flow: 1 When selecting the volume flow of the air compressor, first understand the volume flow of all the gas equipment, multiply the total flow volume by 1.2 (that is, enlarge the 20% margin); 2 The new project can be based on The flow value provided by the design institute is selected; 3 to understand the volume flow parameters of the gas equipment by the gas equipment supplier; 4 The air compressor station transformation can be selected according to the original parameter value combined with the actual gas condition; The selection of the user is beneficial to both the user and the air compressor equipment. The selection is too large and wasteful. If the selection is too small, the air compressor may be in a state of being loaded for a long time or the air is not enough or the pressure cannot be used. The relationship between power and working pressure and volumetric flow rate is the same when the power is constant. When the rotational speed changes, the volume flow rate and the working pressure also change accordingly; for example: a 22KW air compressor is manufactured at the time of manufacture. Determine the working pressure is 7bar, calculate the speed according to the technical curve of the compressor main engine, the displacement is 3.8 m3/min; when it is determined that the working pressure is 8bar, the speed must be reduced (otherwise the drive motor will be overloaded), then the displacement It is 3.6 m3/min; because the speed is reduced, the exhaust is reduced accordingly, and so on. The power selection is to meet the working pressure and volume flow conditions, and the power supply capacity can meet the power consumption of the matched drive motor. Therefore, the steps of selecting an air compressor are: first determine the working pressure, then determine the corresponding volume flow, and finally the power supply capacity.
This article is edited by China DSNEAIR Compressor Manufactory (https://air-compressor.net). Please indicate