Basic information of hydraulic filter

2020-05-14 13:39:16

There are many ways to collect pollutants. The device made of filter material to collect pollutants is called filter. Magnetic filters that absorb magnetic contaminants with magnetic materials are called magnetic filters. In addition, there are electrostatic filters, independent filters, etc. In the hydraulic system, the collection of contaminated particles in the liquid is called the hydraulic filter. In addition to the use of porous materials or winding slit to intercept pollutants, the widely used hydraulic filter is the magnetic filter and electrostatic filter used in the hydraulic system.

When the above impurities are mixed into the hydraulic oil, with the circulation of the hydraulic oil, the damage will be everywhere, seriously affecting the normal operation of the hydraulic system. For example, a small gap and section are formed between the relative moving parts in the hydraulic components. Small holes and gaps are stuck or blocked, oil film between moving parts is damaged, gap surface is scratched, internal leakage is increased, efficiency is reduced, heat is increased, chemical effect of oil is intensified, and oil deteriorates. According to production statistics, more than 75% of the faults in the hydraulic system are caused by the mixing of impurities in the hydraulic oil. Therefore, it is very important for the hydraulic system to keep the oil clean and prevent the oil pollution.

General hydraulic filter is mainly composed of filter element (or filter screen) and shell (or framework). The flow area of the oil is formed by many small gaps or holes in the filter element. Therefore, when the size of impurities mixed in the oil is larger than the small gap or small hole, the oil block is filtered out