空压机

400
Online customer service
Online customer service system
Ziqi compressor
current location: Home > News management > Company news > The marking method and technical parameters of air compressor

The marking method and technical parameters of air compressor

time:2017-09-14 13:06:00source:Ziqi compressorauthor: 胡译鑫Clicks: 0
Air compressor mark method and technical parameters of air compressor four basic method of indicating the use of motor horsepower to 1, said: This is in the early stage of the air compressor technology developed at work, but with the continuous developmen

空压机的标示方法和技术参数

  The marking method and technical parameters of air compressor

  Four basic methods of marking air compressor

  1, the use of motor horsepower said:

  It was early in the air compressor technology developed at work, but with the continuous development of technology, now is to use the same motor, but also because of pressure, compressor manufacturers and models of different sizes, and the actual air compressor exhaust amount has not Po day. Therefore, it is the most irresponsible practice to indicate the power of motor horsepower in the catalogue.

  2. Use the gas volume (Inltvolume) to indicate that:

  This representation is usually fixed on the side of the inlet with an aperture side meter (orificemeter) and is currently only used to indicate the size of the centrifugal compressor. The unit use CFM, which is more accurate than the previous one, is still higher than the actual outgassing amount because of no internal loss.

  3. The use of the piston displacement (Pistondispiacent) to indicate that:

  Since this is the design data of compressor, only the size of the cylinder can be multiplied by the revolving number, so this information is most easily obtained, and is also used for marking by many manufacturers. There is no relation between the theoretical value and the actual outgassing quantity, depending on the technical ability of the manufacturer.

  This method is based on the aperture side flowmeter at the outlet side, and is the main standard in the world because of its accuracy, so as to set the actual air volume of the compressor, such as 150, ASME, JIs and so on. However, in some Japanese manufacturers directory, F.A.D. is used to label, and NoinaloaPaoity is added, which is generally understandable: the F.A.D. is not real, but just a design value. Unfortunately, there is no standard is one thing, to do is another, therefore, unless the original directory on the basis of criteria that put it down in black and white, and its credibility will be greatly reduced.

  Under different conditions, the actual wind output is the actual air volume, which refers to all the losses considered at the outlet of the compressor (after the cooler). The air volume is usually expressed by the free gas volume (FreeAirDelivery). The so-called free outgassing amount refers to the free air condition (temperature, pressure, humidity, etc.) after the compressor compressed air volume to enter the air inlet. So, even if the same test standard is used, it will be expressed because of the different free air used.

  1. Normal condition (Noralcondition):

  The method of expression: the air condition indicated by Nm:/Inin (or indicating the air entry status used in the side test): 760mmHg, 0 C, ORH, volume index: 1;

  2. Standard condition (standardcondition):

  Presentation method: the air condition referred to by SCFM (or indicating the gas entry status used by the test): lbar, 200C, ORH volume index: 1.05 (about)

  3. Actual situation (Actualcondition):

  The way of expression is: ACFM, ICFM (or indicate the air condition of the air intake used in the side test): 14.4Psi, 35 C, 6ORH volume index: 1.20 (about) the same air volume, and the number will increase 20 if we use different air conditions.

  The actual wind output (FAD) measured at different pressures is related to the reference air condition, and also under the pressure test. For example, when the roots blower of 55KW is measured at 0.5bar, the actual air volume is about to take the land. The actual air volume of 40M5/min, 55kW's micro oil screw compressor at 8bar is about 9.1m5 / min, while the actual air volume measured at 13bar is about 6.8m5 / min.

  Therefore, when comparing the actual air flow rate of the same power different brand compressor, the most time pressure of the side test flow should be considered. There is no rigorous theoretical calculation formula for conversion, but there is an accepted empirical formula for reference.

  For the fuel injection screw compressor, if the pressure is raised, the same actual air volume should be maintained, the rotor speed should be increased, and the motor power of 67 should be consumed at the same time. For a fully oil free screw compressor, the power consumption of about 10 is required. For example, suppose that a 55kW micro oil screw machine A has the actual air volume of 9.5m5 / min on the lower side of 7bar, and the other 55kW micro oil screw machine B has the actual air volume of 9.1m5 / min on the lower side of 8bar, which is exactly the efficiency of the A or the efficiency of the 9.1m5. According to the above empirical formula, when A keeps 9.54m5 / min air volume unchanged under 8bal, it needs to increase more than 6 of the power consumption, namely 55kwtimes and 1.06=58.3kw.

  A:58.3kwdivide; 9.5m5/min=6.11kw/ (m5/min)

  B:55kwdivide; 9.1m5 / min=6.04kw/ (M5 / min) (6.11 1 6.04) divide:6.04times:

  100=1.16: that is to say the efficiency of the B compressor is 1.16.

  The efficiency of the motor power compressor of the air compressor is related to the actual air output of the compressor and the power consumed by the motor. The actual air volume will vary greatly in numerical values due to the different side test methods and the different representation methods. There is a similar situation in the inspection of the motor power of the compressor. At the same time, the efficiency of the compressor is also related to the service coefficient of the motor and the efficiency of the motor.

  The motor power of L and ServiceFactor is the nominal horsepower or rated power of the motor, but this is not equal to the actual power consumed by the motor. For the manufacturers in Europe and the domestic China, the actual motor power consumption is generally less than the rated power on the nameplate, and manufacturers in the United States are equipped with a small motor habit, the service such as larger coefficient of 1.25; while in full load, the motor can output more than 15 nameplate, such as the logo for looHP motor, the the actual output power of the motor which makes the actual consumption must be smaller than the rated power of motor nameplate on the old rules


Product list
Recommended information
Contact us
  • Ziqi compressor (Shanghai) Co., Ltd.
  • Pre sales call:400-0161-099
  • After sale call:021-58220650
  • Mail:ziqi@ziqi-group.com
  • Company address: No. 8, Jian An Road, Shanghai, Jinshan District
2010-2017 Copyright © Shanghai Ziqi compressor company ICP 123123123Number Sales consulting:400-016-1099