Abstract: The function of the air filter is to provide clean air to the diesel generator and reduce the early wear of the diesel generator. In addition, the air filter plays a crucial role in the intake noise, the economy and power performance of diesel generators. In this article, Cummins Company explains the design and calculation process of the main performance parameters of the air filter from several aspects such as intake resistance, filtration efficiency, and ash storage capacity. By analyzing various performances of the air filter, the size and material of the air filter were determined.
The main function of the air filter is to provide clean air for these mechanical equipment to prevent them from inhaling air containing impurity particles during operation, which would increase the probability of abrasion and damage. In the diesel generator industry, the air filter is an important component of the diesel generator's intake system. With the continuous enhancement of engine performance, research shows that the performance, wear and service life of the engine are closely related to the performance and structure of the air filter device. The air filter of a diesel generator is mainly a device responsible for removing particulate impurities from the air. Diesel generators are very precise components. Even the tiniest impurities can damage the engine. Therefore, before air enters the cylinder, it must first pass through the fine filtration of the air filter before it can enter the cylinder. The air filter is the guardian of the engine. The condition of the air filter is related to the lifespan of the engine. If a diesel generator uses an overly dirty air filter during operation, it will cause insufficient air intake to the engine, resulting in incomplete fuel combustion, unstable engine operation, reduced power and increased fuel consumption. Therefore, the air filter of the diesel generator must be kept clean. The air filter is composed of two parts: the filter element and the housing. The main requirements for an air filter are high filtration efficiency, low flow resistance, the ability to be used continuously for a long time and no maintenance required.
By means of the rotating airflow, dust particles are separated from the air under the action of centrifugal force, achieving the purpose of filtration. Centrifugal separation is the theoretical basis for the design of coarse filters.
The airflow passes through the porous medium filter element, and dust exceeding a certain size remains in the medium, similar to the principle of a screen. According to the thickness of the medium, it is divided into surface filtration and depth filtration. The medium of surface filtration is thin, and the filtration only occurs on the surface, forming ash cakes on the surface, and the performance decreases rapidly. For example: filter paper, non-woven fabric, filter screen. Deep filtration works throughout the entire medium volume. The resistance growth of the filter element is slow, the ash storage capacity increases, and the service life is prolonged.
After the medium is immersed in oil and drained, the particles are adsorbed by the viscosity of the oil. Such as metal wire mesh, foamed polyurethane, etc.
The filtration efficiency of electrostatic precipitation is very high and it can remove dust smaller than 0.01um. However, the volume of the air filter is too large and it is not easy to use on the generator set
Qinghe County Dongsen Auto Parts Co., Ltd. is located in Qinghe County, Xingtai City, Hebei Province. It was established in 2024. Although the company was established a short time ago, it has more than 10 years of production experience. We are a manufacturer specializing in the production of air filters, air conditioning filters and oil filters. The filters produced by our factory serve the domestic and foreign markets and have won unanimous praise from customers in Southeast Asia, Africa, South America and other regions.
