2026-04-10Views：
Users who use screw air compressors often complain about the accumulation of water in the head of the air compressor, and some even appear on the new screw air compressor that has just been used for a short time, causing the head of the screw machine of the air compressor to rust or even get stuck and damaged, losing money and time.
First of all, we need to find out why the screw air compressor accumulates water:
definition of dew point: Under a fixed pressure, the temperature at which the gaseous water contained in the air reaches saturation and condenses into liquid water.
Our atmosphere contains water vapor, which is what we usually call humidity. This water will enter the screw air compressor with the atmosphere.
When the screw air compressor is running, the dew point of the compressed air will decrease with the increase of the pressure, but at the same time, the compression process will also generate a lot of compression heat. The oil temperature of the compressor in normal operation is designed to be above 80°C, so that the heat of compression volatilizes the water in the air into a gaseous state and discharges it to the back end with the compressed air.
If the selection of air compressor is too large, or the user's gas consumption is extremely small, the running load rate of screw machine is seriously low, which will lead to the oil temperature not reaching above 80 ℃ for a long time, even lower than the dew point. At this time, the moisture in the compressed air will condense into a liquid state and remain inside the air compressor, mixed with the lubricating oil. At this time, the oil filter and the oil core will increase the load and fail quickly. In severe cases, the oil will deteriorate and emulsify, causing the main engine rotor to rust and jam.
When the ambient temperature is 20 ℃ and the relative humidity is 100, under the pressure of 10KG, the exhaust temperature below 68 ℃ will produce condensed water. With reference to this figure, you can inquire about the temperature of condensed water under different conditions.
In the following situations, pay special attention to whether the air compressor is flooded:
factory trial production stage, capacity is not fully opened
high humidity and humid environment, such as Huangmei rainy season in Jiangnan area
unit loading rate continuously below 30%
solution
in the selection of equipment, be sure to ask professionals to choose the appropriate power of the air compressor unit.
In the case of low gas consumption or high humidity, the screw machine is shut down for 6 hours and then drain the condensate in the oil and gas barrel until the oil flows out. (Regular discharge is required, and how long it takes depends on the use environment of the screw machine)
for the air-cooled unit, the fan temperature switch can be properly adjusted and the heat dissipation can be adjusted to increase the oil temperature; for the water-cooled unit, the water intake of the cooling water can be properly adjusted to ensure the oil temperature of the air compressor. For the frequency conversion unit, the minimum operating frequency can be appropriately increased to increase the machine speed and increase the operating load.
For users with particularly small gas consumption, properly discharge the pressure of the regular back-end gas tank to artificially increase the operating load of the machine.
The use of genuine lubricating oil, a better oil-water separation, not easy to emulsify. Check the oil level before each boot to see if there is any abnormal rise or oil emulsification.
What are the advantages and disadvantages of water lubricated screw air compressor. Long ago, it was often said that the water-lubricated air compressor was not easy to use because of its high cost and high failure. This statement is too general and simple to understand.
Granklin water lubricated oil-free air compressor, through water lubrication, air compressor head operation process, do not need lubricating oil. Compressed air does not contain oil, in order to meet the modern, large-scale safety production.
As the screw oil-free and water-lubricated screw air compressor is a stainless steel single screw main machine for the whole series, it can save more than 15% energy than the secondary dry twin screw and more than 36% energy than the primary twin screw. Oil-free screw air compressor reaches the energy-saving level of oil machine. Avoid frequent and high maintenance of dry screw. Energy saving: Grankering single-screw main engine with high volumetric efficiency is adopted, which has low specific power and is more efficient and energy-saving than twin-screw oil-free air compressors.
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Permanent magnet variable frequency air compressor has always been sought after by industrial enterprises with the characteristics of high efficiency, energy saving and environmental protection, and its energy saving effect is also very considerable. In recent years, more and more air compressors with high energy consumption have been replaced by permanent magnet variable frequency air compressors on the market.
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Air compressor maintenance is not in place will appear a variety of faults, want to quickly solve the air compressor fault needs to find the cause of the fault. The air compressor is still working, but the air supply is insufficient. The air compressor works at a certain pressure and stops the gas tank. In general maintenance of air compressors, we encounter a series of faults such as high temperature shutdown, oil injection from the air inlet of the air compressor, low exhaust pressure, excessive oil and gas emissions from the exhaust valve, etc. When we encounter these faults, we must deal with them step by step.
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