Common Low-Temperature Start-up Methods
1. Use diesel air compressor oil with good low-temperature performance. This type of air compressor oil has low viscosity at low temperatures, provides good lubrication between friction pairs, reduces starting resistance, and facilitates starting.
2. Use a battery with good low-temperature performance. If necessary, the battery can be insulated to ensure it can charge normally and have sufficient output current under low-temperature conditions, thereby improving the starting system power.
3. Flame preheating start-up;
4. Add cold start fluid;
5. Circulating water heating system (also known as fuel heater heating system); In addition to the above preheating methods, hot water preheating, steam preheating, electric preheating, and other methods can also be used for low-temperature starting.
Before using the air compressor, we should open the side cover and observe whether the oil has thickened or frozen. If so, the oil must be heated first. Even if the oil is not frozen, the oil viscosity in the lubrication parts of the unit is relatively high when starting up in winter. Combined with the relatively low voltage at some outdoor work sites, this can easily make starting relatively difficult. The general method is to first rotate the compressor 2-3 times, then jog the compressor 3-4 times, allowing it to run idle for a period before loading. The compressor's current can be measured with a multimeter after it has reached normal operating conditions. Normally, the current should be within 5% of the motor's rated current. If it exceeds 10% of the normal current, there is a problem with the unit or the voltage is too low, and it should be stopped for inspection. Otherwise, in addition to the motor easily overheating and burning out, it will also waste electricity. A major reason for excessive current is the beginning of oil separator blockage.
After shutting down in winter, it is essential to vent all gas, drain sewage, and drain water, including water, gas, and oil from all pipes and the air tank. This is because the unit operates at a relatively high temperature in winter, and after shutdown, the outside temperature is low, causing a large amount of condensate to form. This condensate can accumulate in various control pipes, intercoolers, and the air tank, easily causing blockages in the control pipes and intercoolers, and potentially leading to air tank rupture.
At the same time, when cold air enters the air compressor, it encounters high temperatures and produces a large amount of water vapor, increasing the burden on the air compressor's after-treatment system. Therefore, it is necessary to frequently drain the water from the after-treatment equipment.