Principles of Viscosity of Lubricating Oil for Diesel Generator Sets

The main function of lubricating oil for diesel generator sets is to reduce the friction and wear of moving parts, clean and cool the friction surface, improve the sealing performance between the piston ring and the cylinder wall, and also play a role in rust prevention. When users choose lubricating oil for diesel generator sets, the viscosity of the engine oil should be appropriate. Do you know the principle of selecting lubricating oil viscosity for diesel generator sets?

The viscosity of lubricating oil is the flowability or consistency of the engine oil at a certain temperature, which is the most important property of lubricating oil. The viscosity of lubricating oil has a great impact on the reliability and durability of diesel engine operation. It is necessary to choose engine oil with appropriate viscosity to ensure the normal operation of diesel engine. If the viscosity is too low, the oil pressure of the engine will be low, and the oil film cannot be maintained at the parts that need lubrication, losing its lubricating effect and entering the boundary lubrication area, increasing the wear of the engine. Severe cases can cause accidents such as cylinder pulling, tile burning, and shaft sticking, resulting in high viscosity and difficulty in cold starting the engine. Although the oil pressure is high, it flows slowly and cannot quickly reach the lubrication parts, leading to increased wear. The principle for selecting lubricating oil viscosity is to use low viscosity lubricating oil as much as possible while ensuring that the diesel engine is in a liquid lubrication state.

The viscosity of lubricating oil changes with temperature. When the temperature increases, the viscosity decreases. When the temperature decreases, the viscosity increases. The smaller the change in oil viscosity with temperature, the better. The viscosity of lubricating oil should consider the changes in geography and seasonal temperature. In northern China, oils with lower viscosity are generally used, while in southern China, oils with higher viscosity are used in summer and oils with lower viscosity are used in winter.

In addition, graded viscosity lubricants have more advantages than single-stage viscosity lubricants, as they can provide good low-temperature starting, complete lubrication, and a strong and tough oil film at high temperatures. In areas with significant temperature fluctuations throughout the year, graded viscosity lubricating oil can be used, which is more beneficial for improving the reliability and durability of diesel engine operation. For example, in areas with temperatures ranging from -10 ℃ to 40 ℃, 20W/40 engine oil can be used. In areas with temperatures ranging from 20 ℃ to 40 ℃, 15W/40 engine oil or 10W/40 engine oil can be used.

Attention should be paid to the following management matters during the use of lubricating oil for diesel generator sets

1. Different manufacturers and brands of engine oil are not allowed to be mixed.

2. When the diesel generator set is running, the oil level should be kept between the upper and lower marks on the dipstick. When the oil level is found to be too low, the engine oil should be replenished in a timely manner. When refueling, the engine oil must be filtered first.

3. The oil pan and lubricating oil circuit of the diesel generator set should be cleaned regularly. When draining oil, the engine should be warmed up and the engine oil should be drained while it is still hot.

4. Before starting the diesel generator set, the pre supply oil pump should be used to pump oil, and the unit can only be started after confirming that the oil has reached all lubrication points.

5. Regularly clean and maintain the oil filter and centrifugal filter according to the maintenance and use instructions of the diesel generator set to ensure that the oil entering the main oil passage is clean.

6. When oil dilution or water vapor escaping from breathing is found, the machine should be stopped in time to find the cause. After troubleshooting, the oil should be replaced before restarting.

Diesel generator sets play an important role for enterprises, and it is absolutely not allowed to be unable to start normally at critical moments. Only by preparing in advance can the unit perform at its best during operation. In the preparation work for diesel generator sets, the first thing users need to do is to choose the correct lubricating oil according to the above introduction.

As a professional diesel generator manufacturer, we always insist on using first-class talents to build a first-class enterprise, create first-class products, create first-class services, and strive to build a first-class domestic enterprise. If you would like to get more information welcome to contact us via sales@dieselgeneratortech.com.