Introduction to the Working Process of Lubrication System in Diesel Generator Set

Aug. 26, 2021

At present, lubrication system of most diesel generator set use wet oil-bottom compound lubrication. The lubrication system is a very important parts for diesel generator sets. Understanding the working process of the lubrication system will help users understand the working principle of diesel power generation more clearly.

 

Lubrication system is a very important system of diesel generator set, which mainly includes: oil pan, oil, rent filter, fine filter, cooler, main oil passage, oil garden, safety and pressure regulating valve and other parts. At present, most diesel generator set adopts the wet oil bottom compound lubrication method.

 

 

Brief Description of the Working Process of Lubrication System in Diesel Generator Set

 

The working process of the lubrication system: The engine oil of the generator set is added into the diesel engine oil sump through the fuel filler opening on the side of the engine body (or on the cylinder cover). The oil is sucked into the oil pump through the oil filter, and the oil outlet of the pump is communicated with the oil inlet pipe of the body of the generator set. The oil passes through the oil inlet line to the coarse filter base, which is divided into two paths. Part of the oil goes to the fine filter, filtered again to improve its cleanliness, and then flows back to the oil pan. Most of the oil enters after being cooled by the oil cooler. The main oil passage is then divided into the following roads:

 

1. Inject oil into the inner cavity of the piston top of each cylinder through the fuel injection valve to cool the piston and lubricate the piston pin, the piston pin seat hole and the small connecting rod sleeve, and at the same time lubricate the piston, piston ring and cylinder liner.

 

2. The engine oil of the generator set enters the main bearing, connecting rod bearing and camshaft bearing, lubricates each journal and returns to the oil pan.

 

3. From the main oil passage to the cylinder head through the body vertical oil passage, the generator set lubricates the valve rocker arm mechanism and then flows back into the engine oil bottom through the push rod hole on the cylinder head.

 

4. Spray to the gear system through the fuel injection valve in the gear chamber, and then flow back to the oil pan.

 

A pressure limiting valve is installed on the oil pump of the generator set to control the outlet pressure of the oil pump. A safety valve is installed on the generator bracket at the front end of the generator body, so that oil can be supplied to the main oil passage in time when the generator set is started, and the main oil passage can be ensured when the cooler is blocked. A pressure regulating valve is installed on the main oil passage on the right side of the machine body to control the oil pressure of the main oil passage so that the generator set can work normally. The oil cooler is also equipped with oil pressure and oil temperature sensors. In the entire generator set lubrication system, the oil pan is used as a container for oil storage and collection, and two oil pumps are used to realize oil circulation.

 

The above is the working process of the wet sump lubrication system used in most diesel generator sets. There is also a dry sump lubrication system. The dry sump can reduce the stirring and splashing of the oil, and the oil is not easy to deteriorate. It can also reduce the height of the diesel engine, and is suitable for occasions where the vertical and horizontal tilt requirements are large and the height requirements of the generator set are particularly low, such as tanks, airplanes and some construction machinery generator sets.

 

We hope that the majority of users could have better understand of the working process of lubrication system in diesel generator sets through the introduction of this article. Dingbo Power is a professional diesel generator manufacturer integrating the design, supply, debugging and maintenance of diesel generator sets. We can provide you with diesel generator sets of various specifications from 30KW to 3000KW. Please call us for consultation or contact us at dingbo@dieselgeneratortech.com.

 


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