2026-04-10Views：
The shortcomings of permanent magnet variable frequency air compressor mainly include the following:
oil problem: For oil-injected permanent magnet variable frequency air compressors, the compressed air contains oil, which may not be applicable in specific industries such as the food industry, because the oil may contaminate the product.
Rotor stuck phenomenon: After long-term operation, the rotor in the oil-injected permanent magnet variable frequency air compressor may be stuck due to impurities in the lubricating oil, which affects the reliability and standby state of the air compressor.
Life and replacement costs are high: the body life of the oil-free permanent magnet variable frequency air compressor is relatively short, usually only 3-5 years. In addition, the cost of replacing the entire air compressor body often exceeds 60% of the purchase of a new machine, which increases the cost of use.
Poor air tightness: In the oil-free permanent magnet variable frequency air compressor, the gap that must exist between the female and male screws may lead to poor air tightness, which is one of the main reasons for its poor energy efficiency.
Afraid of demagnetization: The motor used in the permanent magnet variable frequency air compressor is a permanent magnet motor, which has the risk of demagnetization. Especially when the motor is in a high temperature state for a long time, demagnetization is likely to occur.
Maintenance is relatively troublesome: Compared with ordinary compressors, the maintenance of permanent magnet frequency converters is more complicated. During the maintenance of the machine head, the motor needs to be disassembled and professional tools must be used because of the strong attraction of the rotor. This requires maintenance personnel to have professional skills.
High manufacturing cost: Due to the high technical requirements of the permanent magnet synchronous motor itself, the manufacturing cost of the permanent magnet variable frequency air compressor is relatively high. This also led to its market price is higher than the traditional air compressor.
High maintenance costs: Although the failure rate of permanent magnet synchronous motors is low, once a failure occurs, its repair and maintenance costs will be relatively high. This requires maintenance personnel with professional knowledge and skills.
In summary, although the permanent magnet variable frequency air compressor has the advantages of high efficiency, energy saving and environmental protection, it also needs to weigh its shortcomings when choosing to use it, and determine whether it is suitable for use according to specific needs.
The moisture content in the air is not a fixed value, but is affected by many factors, including temperature, humidity, geographical location and climatic conditions. In the air at normal temperature and pressure, the moisture content may be in the range of hundreds to thousands of ppm(parts per million
In industrial production, insufficient air consumption of air compressors is a common problem, which may lead to a decline in production efficiency and even affect the normal operation of the production line. In response to this problem, the water-lubricated screw air compressor produced by Shanghai Granklin Group provides an efficient and flexible solution.
Shanghai Granklin Group produces water-lubricated oil-free screw air compressors. Our products are all over the country, as well as overseas Europe, America and Southeast Asian countries. After-sales service for the world, Granklin Group sells not only air compressors, but also some supporting facilities, gas storage tanks and cold dryers.
View detailsThe main differences between micro-oil and oil-free air compressors are reflected in the following aspects: Lubrication method: micro-oil air compressors use a very small amount of lubricating oil to reduce friction and wear during the compression process, which means that the compressed air output may contain trace amounts
Oil-free compressors mainly use the following lubrication methods: Air lubrication: This method reduces the friction between machine parts by increasing the water molecules in the air. During operation, the oil-free compressor will produce water molecules in the compression chamber, and then benefit
The displacement of the air compressor is not equal to the working flow. The following is the detailed difference between the two: Definition of exhaust volume: Concept: The exhaust volume of an air compressor refers to the volume of compressed air discharged by the air compressor within a specified time. It represents the stroke of a piston from one
Formal explanation on the replacement cycle of air compressor oil and gas separator In the compressed air system, the oil and gas separator is the core consumable, and its replacement cycle needs to be scientifically determined by comprehensive equipment working conditions, operating environment and maintenance level. After the comprehensive industry practice and technical specifications, now on the phase.
Yes, the air compressor needs to discharge water every day. Under normal operation, the air compressor needs to discharge water once a day to remove the accumulated moisture inside the equipment. If the ambient humidity is high or the water content in the air is high, the frequency of water discharge needs to be increased to avoid moisture damage to the equipment
Too much moisture in the screw air compressor is a common problem, which may be caused by a variety of reasons. The following is a detailed analysis of this problem and the corresponding solutions: Cause analysis The air humidity is high: When the air humidity is high, it is compressed After the formation of a supersaturated situation, empty
Compressed air specifications and standards for enterprises mainly involve the following aspects: Pressure requirements: The pressure of compressed air is usually required to be within a specific range of 0.7 to 1.0 megapascals (MPa). This standard helps to ensure the stability and efficiency of the compressed air system
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