Matters needing attention when permanent magnet variable frequency air compressor stops and starts again for a long time

Matters needing attention when permanent magnet variable frequency air compressor stops and starts again for a long time

in the cold winter, if you do not pay attention to maintenance, it will cause the air compressor to malfunction. Therefore, in winter, due to long-term shutdown and no antifreeze protection, it is not uncommon for the cooler to freeze and malfunction when the body starts.

Oil injection air compressor winter use matters needing attention

1. Before starting the air compressor, ensure that the oil temperature is not lower than 2 degrees. If the temperature is too low, please use a heating device to heat the oil and gas drum and the main engine.

2. Check that the oil level is in the normal position, check that all condensate discharge ports are closed (should be opened when long-term shutdown), and the water-cooling unit should also check whether the cooling water discharge port is closed (open this valve when long-term shutdown).

3. After the equipment is powered off, the host coupling should be manually rotated and flexibly rotated. Please do not blindly open the body that is difficult to open. Check whether the body or motor is faulty, whether the lubricating oil is viscous or invalid, etc. Only after troubleshooting, can open the air compressor.

4. For air compressors with long downtime or long use time, it is recommended to replace the oil filter before starting to prevent the engine from penetrating into the oil filter due to the decrease in oil viscosity when the engine is started, resulting in insufficient oil supply, Resulting in instantaneous heat generation when the engine starts.

5. After the above work inspection, the startup should be inching operation, and check whether the operation and the startup sound of the body are normal. If the temperature changes suddenly, please stop the machine immediately for inspection. Do not start the air compressor frequently. If necessary, add an appropriate amount of coolant to the air compressor body.

6. If a heat recovery machine is installed, please close the oil valve of the heat recovery system. After the standby group is running normally, slowly open the oil control valve of the heat recovery system.

7. When the two-stage compressor unit, especially the high-power model, starts again after a period of shutdown, it is necessary to add an appropriate amount of lubricating oil to the air inlet and jog 2-3 times. When starting, it should be opened from the oil and gas barrel to the body. All oil injection regulating valves. If the exhaust temperature is too low after stable operation, the water inlet of the customer's cooling water valve can be adjusted to control the temperature. If necessary, according to the actual temperature, you can adjust the injection valve to control the inlet to achieve the appropriate exhaust temperature.

8. The inverter should consider the exhaust temperature in winter to prevent the exhaust temperature from being too low (mainly due to the low exhaust temperature caused by long-term low-frequency operation). The opening of the cooling water valve is adjusted according to the exhaust temperature. If necessary, it can be replaced with a high-temperature thermal control valve core to avoid oil emulsification.

Oil-free air compressor winter use matters needing attention

1. During the shutdown period, if possible, heat should be supplied to the air compressor in some way. If this is not possible, the compressor should be shielded with plastic sheeting or other shielding to prevent wind and snow from eroding it.

2. When the air compressor unit is working, the temperature is relatively high; after the transmission is stopped, due to the low outside temperature, a large amount of condensed water will be generated and exist in the pipeline. If it is not discharged in time, the cold weather in winter may cause the air compressor exhaust pipe and other equipment to be blocked, frozen and cracked. Therefore, in winter, after the air compressor is shut down for cooling, it is necessary to discharge all gas, sewage and water, and discharge the liquid water in the pipeline in time.

3. If the air compressor is water-cooled, please drain the water in the cooling water pipe network. For the air compressor, open the drain valve and drain valve of the cooler. For air compressors, please open all intermediate cooling and after cooling drain valves and blowdown valves. The air-cooled type similarly opens the drain valve of the cooler to drain the liquid water from the cooler.

4. After the air compressor stops during the holidays, please turn off the power, open all drainage and sewage valves, and then quickly turn the coupling.