Q: What should I do if there is water in the gas of the air compressor?
Answer: Oil free air compressors are usually lubricated with water, and the compressed gas contains abundant water vapor. A better way is to remove water vapor from compressed gas through a post-treatment cold dryer or suction dryer, which can be effectively removed through a precision filter.
Q: What are the vulnerable and consumable parts of oil-free air compressors?
Answer: Oil free air compressors usually use screw compressors of the water lubricated series, and the consumables for water lubricated air compressors are air and water filter elements.
The wear and tear parts of water lubricated oil-free air compressors are relatively few, and maintenance of the compressor head is only necessary after running for a sufficient period of time. Regular maintenance only involves the air filter element and water filter element.
Q: Do air compressors in the food industry have to be oil-free?
Answer: Yes, an oil-free air compressor must be used.
Food safety is increasingly valued nowadays, and no one wants lubricating oil residue in the food they eat. So the best choice is to use oil-free air compressors. Currently, the water lubricated oil-free air compressors produced by Shanghai Granklin Group are widely used in industries such as food and healthcare, compressing oil-free air into production lines.
Wrong answer: Air compressors in the food industry do not necessarily need to be oil-free. Although the food industry has high requirements for air compressors, it is not necessary to use oil-free air compressors. The combination of an oil compressor and oil removal equipment can also meet the requirements, and it is more cost-effective, energy-saving, and can ensure that the compressed air is cleaner.
Summary: Oil-free air compressors are the ultimate choice in the food industry, and the importance of food safety is highly valued by both the government and individuals, making oil-free food.
Q: Is there a difference between oil-free air compressors and regular air compressors?
Answer: There are differences.
The oil content of the compressed gas from an oil-free air compressor is non oil. For example, the water lubricated oil-free air compressor produced by Shanghai Granklin Group uses water as the lubricant at the head of the air compressor, without the involvement of lubricating oil during operation.
Ordinary air compressors require lubricating oil at the head of the compressor, so the oil content of the compressed gas is relatively high. It cannot be applied in fields such as medicine, chemicals, and food.
Q: How do air compressors distinguish between frequency conversion and power frequency?
Answer: The air compressor manufacturer will indicate on the nameplate of the air compressor whether it is a power frequency air compressor or a variable frequency air compressor.
If the air compressor manufacturer does not indicate it on the nameplate, you can refer to the motor nameplate and controller label. On the working panel of the air compressor, you can also check if there is a prompt for variable frequency or power frequency.
Q: What is the difference between variable frequency air compressors and power frequency air compressors?
Answer: Compared to power frequency air compressors, variable frequency air compressors have more stable air pressure and smoother current.
The most energy-efficient variable frequency air compressor is a permanent magnet variable frequency air compressor using a permanent magnet motor, which significantly reduces energy consumption.
When the power frequency air compressor starts, the impact on the power grid is greater than that of the variable frequency air compressor.
The frequency conversion air compressor also significantly reduces noise, and it is recommended to choose a permanent magnet frequency conversion air compressor when purchasing air compressors.
Q: What are the common faults of air compressors?
Answer: Air compressors often encounter some problems during use. Introduce some common faults and maintenance methods.
1. The air compressor is still working, but the air supply is insufficient. The air compressor operates at a certain pressure and stops the air tank.
Listen for air leaks in various pipelines outside the air compressor, compressor supply pipelines above the air storage tank, one-way valves, safety valves, pressure switches, etc. If the above problems are eliminated, it may be due to wear on the scalp bowl or exceeding the rated flow rate, and the machine is overloaded. As for the damage to the leather bowl, it must be replaced. The lifespan of an ordinary leather bowl is about 3 years.
2. The air compressor operates intermittently and the air supply is insufficient.
This fault is caused by insufficient voltage. There was a buzzing sound at the beginning. For example, the operating current at this time is too high. The minimum working voltage is 200 volts, making it difficult to start at this voltage. Frequent start-up can lead to an increase in head temperature. Final short-circuit shutdown. When it opens again, it should wait for its temperature to drop before opening. For areas where voltage fluctuations often occur, it is recommended to install automatic voltage stabilizers.
Q: Are air compressors and compressors the same thing?
Answer: Air compressors and compressors are not the same product
Process compressors can compress various gas media, such as hydrogen, nitrogen, chlorine, oxygen, etc. Air compressors are mainly used to compress air, and they are used in many industries;
The application scope is even more widespread in industries and departments such as petroleum, chemical industry, metallurgy, power, machinery, light industry, textile, automotive manufacturing, electronics, food, medicine, biochemistry, scientific research, etc.
Compressor is a general term, and air compressor can be said to be a type of compressor. Air compressor is included in the compressor, and currently there are many types of compressors, including refrigerant compressor, hydrogen compressor, and air compressor.
Air compressors, also known as air compressors, are simply used to convert mechanical energy into pressure energy for operation. Air compressors are widely used in the power industry. In addition to being widely used in the power industry, they are also commonly used for cooling and separating gases, transporting gases, and other purposes.
Which is better, oil-free vortex air compressor or screw air compressor? Let’s first take a look at the disadvantages and then take a look at the advantages:
1、 Disadvantages of oil-free vortex air compressor:
(1) The surface of its moving parts is mostly curved, and the processing and inspection of these curved surfaces are relatively complex, some of which require specialized equipment, resulting in high manufacturing costs;
(2) The sealing between moving parts or between moving parts and fixed parts is often achieved by maintaining a certain movement gap, and gas leakage will inevitably occur through the gap. This limits the difficulty of achieving a high compression ratio for rotary compressors, so they are often used under air conditioning conditions;
(3) The screw air compressor is also a rotary displacement type machine, and the compression of air is achieved by the volume change of the teeth slots of the male and female rotors installed in parallel mesh within the casing.
2、 Advantages of oil-free vortex air compressor:
(1) The oil-free vortex air compressor belongs to volumetric rotary machinery, which utilizes the meshing of the vortex rotor and the vortex stator to form multiple compression chambers;
(2) There is no reciprocating motion mechanism, so the structure is simple, the volume is small, the weight is light, the parts are few (especially the vulnerable parts are few), and the reliability is high;
(3) Small torque variation, high balance, low vibration, smooth operation, making operation simple and easy to achieve automation;
(4) It has high efficiency within its applicable refrigeration capacity range;
(5) Low noise.
3、 Disadvantages of screw air compressors:
(1) The tooth surface of the rotor is a spatial curved surface that needs to be processed using specially designed cutting tools on expensive equipment. The machining accuracy of the body components also has high requirements, and high-precision equipment must be used.
(2) Due to the periodic connection between the volume between the teeth and the suction and exhaust ports, the compressor noise is relatively high.
(3) Due to limitations such as rotor stiffness and bearing life, the compressor can only rely on clearance sealing internally, so screw compressors can only be used in the medium and low pressure range and cannot be used in high-pressure situations.
(4) Due to the large amount of fuel injection and the complexity of the oil treatment system, there are many auxiliary equipment for the unit.
(5) Screw compressors rely on gap sealing gas seals and do not have superior performance in small volume ranges.
4、 Advantages of screw air compressor:
(1) The screw compressor is the same as the oil-free scroll air compressor, and both belong to the positive displacement compressor;
(2) High reliability: The screw compressor has fewer components and no vulnerable parts, so it operates reliably and has a long service life. The overhaul interval can reach 40000 to 80000 hours;
(3) Easy operation and maintenance: The screw compressor has a high degree of automation, and operators do not need to undergo long-term professional training to achieve unmanned operation;
(4) Good power balance: The screw compressor has no unbalanced inertia force, and the machine can work smoothly at high speed, achieving groundless operation. Especially suitable for mobile compressors, with small volume, light weight, and small footprint;
(5) Strong adaptability: Screw compressors have the characteristic of forced gas transmission, and the volumetric flow rate is almost unaffected by the exhaust pressure. It can maintain high efficiency within a wide range and is suitable for various working conditions without any changes to the compressor structure.