Preventive Measures for Shaft Current Damage of Diesel Generator Sets

Do you understand the prevention and control measures for shaft current damage in diesel generator sets? For machines that have already experienced shaft current erosion during operation, changing the thickness of the oil film can also reduce the speed of current erosion. Practical use has shown that this method has certain effects. The insulation of machine parts by diesel generator sets is also a method of limiting shaft current, such as insulating one or more places connected to the bearing, so that there is no metal contact between the bearing and its supporting body or any surrounding conductor, isolating the shaft current circuit. But this method is difficult to implement and is rarely adopted. If it is confirmed that the rotating shaft has magnetism, the best way is to perform demagnetization treatment.

For the magnetization effect of the rotating shaft caused by unbalanced winding, the current generated by this effect can be reduced by adding a neutral winding. If this method is not easy to implement, a method of increasing the magnetic resistance through the bearing support magnetic circuit can be used, for example, adding non magnetic materials to the magnetic circuit to meet this requirement. For the rotor of a compressor that is magnetized due to processing, manufacturing, or other reasons, a specialized demagnetization device can be used for demagnetization treatment. The principle of this device is to place the rotor in an alternating magnetic field, which is extremely strong and can quickly eliminate its magnetism.

Taking measures based on the cause of charge is the fundamental way to eliminate axial current. For example, for the electrostatic charge generated by steam turbines, controlling the size of water vapor droplets, changing the material and finish of nozzles and blades, etc. can be used to reduce droplet collisions and frictional electrification. However, this measure is often unrealistic for machines that are already in operation, as it means the need to redesign an effective device to prevent the generation of shaft currents.

Since 1982, Dingbo Generator has been a generator set manufacturer qualified by the "National Internal Combustion Engine Quality Supervision and Inspection Center". The product quality has passed the IS09001 quality system standard certification. And obtained the qualification certificate for self-operated import and export. Over the years, Dingbo units have been widely used in all walks of life, and have won the network access qualification of the Ministry of Information Industry, the network access qualification of the Ministry of Radio and Television, the network access qualification of CNPC, the network access qualification of China Mobile, and the manufacturing qualification of marine units. In 2016, Dingbo was awarded the Certificate of Qualified Supplier of China Nuclear Power Group. Dingbo Generator has been cooperating with Shangchai Power for many years. In 2009, it became the OEM partner of Shangchai Power in China. Dingbo generator VOLVO unit ranks the top three in the Asia-Pacific sales volume, and is the core OEM partner of Sweden Volvo in the Asia-Pacific region. If any question please feel free to visit our website https://www.dieselgeneratortech.com/ or send email to sales@dieselgeneratortech.com.