The quality of hydraulic oil has a great influence on the working performance of hydraulic system. The root cause of many faults is its origin. It prevents oil pollution. Install hydraulic oil filter in the proper place, it can retain the pollutants in the oil and keep the oil clean. To ensure the normal operation of the oil system.
The main function of the hydraulic oil filter is to filter the hydraulic fluid, and various impurities are inevitably present in the hydraulic system. The main sources are: mechanical impurities remaining in the hydraulic system after cleaning, such as rust, cast sand, welding slag, iron filings, paint, paint and cotton yarn, etc., external impurities entering the hydraulic system, such as through the fuel filler and Dust entering the dust-proof ring: impurities generated during the working process, such as debris formed by the hydraulic action of the seal, metal powder generated by relative wear and movement, colloid, asphaltene, carbon residue, etc. due to oxidative deterioration of the oil .
After the above impurities are mixed into the hydraulic oil, with the circulation of the hydraulic oil, the damage will be everywhere, which seriously affects the normal operation of the hydraulic system, such as making a small gap (measured) between the relatively moving parts of the hydraulic components and throttling. Small holes and gaps are stuck or blocked; the oil film between the moving parts is destroyed, the gap surface is scratched, the internal leakage is increased, the efficiency is lowered, the heat is increased, the chemical action of the oil is aggravated, and the oil is deteriorated. According to the 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 maintain the cleanness of the oil and prevent the contamination of the oil.
(2) The hydraulic oil filter should have sufficient flow capacity. The flow capacity refers to the maximum flow rate allowed to pass through the filter at a certain pressure drop. It should be selected according to the filter sample in combination with the installation position of the filter in the system.
(3) The hydraulic oil filter must have a certain mechanical strength and should not be damaged by hydraulic pressure.
(4) For hydraulic systems that cannot be shut down, a filter with a switchable structure must be selected. The filter element can be replaced without stopping the machine. For the case where the filter plugging alarm is required, the filter with the transmitter can be selected.
Post time: Jul-03-2019