Introduction and selection of screw air compressor

Screw compressor-is a rotary positive displacement compressor, in which two rotors with spiral gears mesh with each other, so that the volume of the two rotors meshing from large to small, thereby compressing and discharging the gas. The screw compression components in screw air compressors are manufactured in-house with the latest CNC grinding machine and in-line laser technology to ensure precise manufacturing tolerances.

Its reliability and performance ensure that the operating cost of the compressor is extremely low during the life of the compressor. The adjustment compressor, integrated compressor and dryer series are all new products in the L/LS series compressors.

An air compressor is a device used to compress gas. Air compressors are similar in construction to water pumps. Most air compressors are reciprocating piston type, rotating blade or rotating screw. Centrifugal compressors are very large applications.

For the screw air compressor, the internal compression ratio refers to the screw main suction, exhaust pressure ratio (absolute pressure), the external compression ratio refers to the air compressor suction, exhaust pressure ratio (absolute pressure).

For multi-stage compressors, the pressure ratio is also called the total pressure ratio, which refers to the ratio of the exhaust pressure measured at the last stage exhaust pipe to the suction pressure measured at the first stage intake pipe. The ratio of the nominal suction and exhaust pressures of the corresponding levels is called the pressure ratio of the levels. Volume flow volume flow is also known as displacement or nameplate flow in China.

Generally speaking, under the required exhaust pressure, the gas volume discharged by the air compressor per unit time is converted to the intake state, that is, the volume value of the suction pressure at the stage intake pipe and the suction temperature and humidity. which is the volume of inhalation.

Press, the actual displacement of the air compressor is qualified when the nominal flow rate is ± 5%.

If the speed does not change, the pressure change theoretically does not affect the displacement, specifically, the volume flow, and does not affect the mass flow. Because the exhaust volume we generally refer to refers to the intake air flow, there is no change

compressor oil replenishment

in the running state, the oil level of the compressor should be kept between low and high oil levels. More oil will affect the separation effect, and less oil will affect the lubrication and cooling performance of the machine. During the oil change period, if the oil level is lower than Low oil level, lubricating oil should be replenished in time:

① After the internal pressure is released after shutdown (confirm that the system has no pressure), pull down the main power switch.

②. Open the oil filler on the oil-gas separation tank and add appropriate amount of cooling lubricating oil.

③. Refer to the regular maintenance table for the oil change time after the normal operation of the air compressor.

Air compressor

when selecting compressed air equipment and evaluating the pressure demand of gas equipment, it is necessary to comprehensively consider the size of the gas supply pressure and gas supply, and the gas supply pressure and total power of the equipment should not be blindly increased. In the case of ensuring production, the exhaust pressure of the air compressor should be lowered as much as possible. Many cylinders of gas equipment only need 3 ~ 4bar, and a few manipulators need more than 6bar. (every low pressure 1bar, energy saving about 7 ~ 10%). For enterprise gas equipment, the production and use can be guaranteed according to the gas consumption and gas pressure of the equipment.

Cooling water system fault. The cooling water of the air compressor is interrupted, the water supply is insufficient or the water temperature is too high. The cooling effect is not good. The temperature in the compressor is too high, which leads to the thermal cracking of the lubricating oil. The carbon deposit is formed at the compressor bearing bush, cylinder, air valve, exhaust pipe, cooler, separator and buffer tank. The carbon deposit is a flammable substance. Under high temperature overheating, mechanical impact and airflow impact, it can cause spontaneous combustion and produce carbon oxides (such as CO), when the concentration reaches a pole, combustion occurs.