The quality of hydraulic oil has a great influence on the performance of the hydraulic system. Many faults are rooted in it. To prevent oil contamination, install a hydraulic oil filter in an appropriate place to trap the contaminants in the oil and keep the oil clean. , To ensure the normal operation of the oil system.
Hydraulic oil filters can be divided into surface type, depth type and magnetic filter according to the filter material. Their filtering effect on solid contaminants is accomplished by direct blocking and adsorption.
The main function of the hydraulic oil filter is to filter the hydraulic oil, and various impurities inevitably appear in the hydraulic system.
The main sources of impurities are:
1. Mechanical impurities remaining in the hydraulic system after cleaning, such as scale, sand, welding slag, iron filings, paint, paint, etc., and impurities that enter the hydraulic system from outside, such as through the fuel filler and dust ring, etc. The dust
2. Impurities generated during the working process, such as the fragments formed by the hydraulic pressure of the seal, the metal powder produced by the relative wear of the movement, the colloid, asphaltene, and carbon residue produced by the oil due to oxidative deterioration.
After the above-mentioned impurities are mixed into the hydraulic oil, with the circulation of the hydraulic oil, it will have a destructive effect everywhere and seriously affect the normal operation of the hydraulic system.
First, it can make the small gaps between the relatively moving parts in the hydraulic components and the throttle holes and gaps jam or block;
Second, it will destroy the oil film between relatively moving parts, scratch the surface of the gap, increase internal leakage, reduce efficiency, increase heat generation, aggravate the chemical action of the oil, and deteriorate the oil.
According to statistics, more than 75% of the faults in the hydraulic system are caused by impurities mixed in the hydraulic oil. Therefore, maintaining the cleanliness of the oil and preventing oil contamination are very important for the hydraulic system.
How to choose a hydraulic oil filter?
(1) When selecting a hydraulic oil filter, it can be based on the characteristics of the above-mentioned various filters, combined with the requirements of various typical hydraulic components and systems for pollution levels or filtration accuracy, system working pressure, oil temperature and oil Select the model of the filter based on the viscosity of the liquid.
(2) The hydraulic oil filter must have sufficient flow capacity. Flow capacity refers to the maximum flow allowed through the filter under a certain pressure drop. It should be selected according to the filter sample according to the installation position of the filter in the system.
(3) The hydraulic oil filter must have a certain mechanical strength and not be damaged by hydraulic pressure.
(4) For hydraulic systems that cannot be stopped, a filter with a switching structure must be selected. The filter element can be replaced without stopping the machine.
GHL filter has the following characteristics: 1. High filtration accuracy. 2. High filtration efficiency. 3. Large dust holding capacity. 4. Good airtightness. 5. Good stiffness and not easy to deform. 6. High cost performance.
Post time: Jul-20-2020