Semiconductor industry selection screw air compressor

What are the standards and references for the selection of permanent magnet variable frequency air compressors in semiconductor factories?

Many semiconductor purchasers will ask what specifications of permanent magnet variable frequency air compressor can save more electricity when purchasing permanent magnet variable frequency air compressor?

How much air compressor gas and pressure is more suitable. According to granklin's big sales data, the 0.8Mpa models of 37KW and 75KW permanent magnet variable frequency air compressors are widely used in the semiconductor industry!

Because of environmental reasons, noise is a matter of concern. How loud is the running sound of variable frequency air compressor?

Permanent magnet frequency conversion air compressor, the main engine and most of the components are imported, in the noise processing is no exception, many 75KW/100HP air compressor in the factory operation, only see the control panel in the display operation, just know this machine is in the running state.

Permanent magnet variable frequency air compressor can generally use a few years?

Now, when many semiconductor purchasers buy permanent magnet variable frequency air compressors in Granklin, the service life is also a key point of concern. In view of the current market situation, a normal maintenance of permanent magnet variable frequency air compressor, the service life of more than 10 years.

For a long time, due to the lack of understanding of the air compressor by some enterprise managers, in line with the principle of continuous use of the equipment, the air compressor is allowed to run continuously, resulting in long running time of the equipment but lack of maintenance, and failures may break out at any time.

1. the subjective cause of the accident

equipment regulator management confusion, production equipment ABC management method, primary and secondary analysis method, classification management method, quantitative analysis of equipment. Based on the proportion of each component of the object and the total, the components of each group are divided into three categories of ABC according to the order of the size of the proportion, and according to a certain cumulative proportion standard. Class A is the focus of management, accounting for about 10% of the total, Class B is the second focus, and Class C is general, accounting for about 70% of the total. The air compressor is rated as general power energy equipment, which should belong to Class A equipment that ensures overall management and focuses on good operation. According to the process control procedures, the equipment should be strictly managed by special personnel. However, company managers often think that air compressor operation management personnel are redundant and do not need to be responsible for them. A large number of part-time personnel are used to replace full-time personnel, resulting in frequent failures due to lack of attention and management by regulators.

2. the objective cause of the accident

various faults will occur during the operation of the air compressor:(1) Unable to start. The cause of electrical failure or operation (the compressor is automatically protected and the emergency stop button is not reset);(2) The exhaust pressure is low. The air filter is blocked and the air intake is small or the intake valve is not fully opened, the motor bearing is worn, and the motor speed is lower than the rated speed;(3) The exhaust oil content is too high. The oil level of the lubricating oil is too high, the oil return pipe filter is blocked, the oil and gas separator core is damaged, the pressure of the compressor is too low, the minimum pressure valve fails, the quality of the lubricating oil is low, and the lubricating oil foam is too much, resulting in an increase in the oil content of the gas. (4) the exhaust temperature is high. The oil level check valve failure does not supply oil to the main engine, the oil temperature control valve fails to work, the oil cooler is abnormal, the water cooling wall is blocked, the heat exchange efficiency is poor, the compressor oil quality is not good, the thermal oxidation performance is poor, and the viscosity grade is low.

The air compressor is noisy and has residual oil during operation.

The noise generated by the air compressor during operation includes the electrical noise generated by high-power motors, the mechanical noise generated by mechanical moving parts, and the aerodynamic noise radiated by suction, exhaust, and exhaust. The pipeline is subjected to pressure pulsation. Vibration radiation noise, compressed air flow noise, exhaust noise, these noises are inevitable.

High-speed air compressors rely on a large amount of lubricating oil for lubrication during operation. The generated high-humidity compressed air needs lubricating oil to cool down. If air compressors are maintained and maintained, oil and gas will fill the air compressor station. Oil-containing accessories and waste oil pollute the environment. Oil-water mixture accumulates at the exhaust port of compressed air, causing environmental pollution due to disorderly discharge.

Analysis on Frequency Conversion Transformation of 3. Compressor

at present, the operation control mode of air compressor is mostly common motor frequency conversion control technology. The compressor is in a long-term operating state with a low load frequency below 35Hz, and the drive motor is an ordinary motor equipped with a frequency converter to control the speed of the yin and yang rotors. When running at low load and low frequency, the output speed of the drive motor is low, and the output torque of the rotor will increase. The large output torque causes the speed of the motor spindle to be particularly low, and the cooling and heat dissipation effect of the spindle is poor. If an ordinary motor is equipped with a frequency converter that only relies on the input frequency of the electrical appliance to control the operating load, the requirements for ordinary motor bearings and motor coils will be very high. The general motor cannot withstand the long-term operation mode of the compressor under low load conditions and high torque and low speed. This long-term operation is bound to cause the motor end bearings and spindle burning phenomenon, which is an inevitable problem in the long-term operation of ordinary motors after the installation of frequency converters.