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Daily use precautions for screw machines

Update:19 Jul 2019

The life cycle of the screw machine is very long, gener […]

The life cycle of the screw machine is very long, generally more than 10 years, but it does not mean that after the air compressor is put into production, it can be used all the time. Air compressors, like other mechanical equipment, need to be routinely maintained and maintained during use to maintain the air compressor in good operating condition and effectively extend its service life.
First, the service life of air compressor oil is generally about 2000h, and must be replaced after expiration. In the replacement, not only the lubricating oil in the fuel tank should be discharged, but also the residual oil in the oil shut-off valve, oil cooler and oil pipeline should be exhausted to ensure the cleanness of the newly added oil. Pay attention to the quality of the lubricating oil when selecting. Pay attention to the oil level during operation. The oil level indication must be in the correct area during operation. It should not be too high or too low. In addition, it is necessary to control the temperature of the lubricating oil to avoid water in the oil.

Second, regular inspections of "run, run, drip, leak". Leakage of Compressed Air In most systems, leaks between 10% and 25% are typical. If there is a leak in the compressed air, the unit needs to be continuously loaded to meet the pressure requirements, which will consume more electric energy, resulting in accelerated loss of the lubricating oil. It is necessary to add lubricating oil in advance.

Third, regularly add grease to the motor, regularly measure current, voltage and so on. A 1% imbalance of the three-phase voltage will cause a phase current to exceed 10%; a 3.5% imbalance of the three-phase voltage will increase the motor temperature rise by 25 °C. Therefore, current and voltage should be regularly detected to reduce production costs and improve machine efficiency. In addition, the motor can not be reversed when wiring, otherwise it will reverse, causing the bearing to be damaged or being killed.

Fourth, replace the "three filters" regularly. The three filters of the screw air compressor have their service life (usually 2000h), and need to be replaced in time after expiration. If it is not replaced, the filter element may be clogged or even ruptured, causing the temperature to rise, the performance to drop, causing other failures to occur, resulting in greater losses.
5. Check whether the addition and unloading of the unit are abnormal, whether the start and stop is abnormal, whether the exhaust pressure is abnormal, etc.; during the operation, check whether the vibration is too large and the noise is abnormal; at the same time, pay attention to the minimum pressure valve, temperature control valve, and off Whether the oil valve, etc. has failed.