Hydraulic oil filter element in the hydraulic system, used to filter the working medium, solid particles and colloidal substances. As well as filter out a variety of oil systems from the outside mixed or the system in the operation of the internal solid impurities, it can effectively control the degree of pollution of the working medium, protect the normal work of mechanical equipment, is the best part of the pipeline series of transport media. So what are the requirements of the hydraulic system for the filter
The hydraulic oil filter element is mainly installed in the hydraulic system: on the oil suction circuit, on the pressure oil circuit, on the return pipeline, on the bypass, and on the separate filtration system.
1, the oil filter is used to protect the hydraulic components of the system, so that it is not damaged by pollution particles. However, it also increases the oil absorption resistance of the pump, so it is necessary to choose large flow capacity, high filtration efficiency, large scale capacity, and small pressure loss. Such as mesh and line gap filters. Filtration accuracy and efficiency is a contradiction, the accuracy of the filter is generally selected 80-200μm, to meet the needs of the line. If it is a plunger pump, you can even consider not applying a filter.
2, the pressure oil filter, its purpose is to protect other hydraulic parts other than the pump, due to the high pressure installation position, should first consider high pressure resistance. If it is used to protect components with poor anti-pollution ability (such as servo valves), it is necessary to consider the filtration accuracy and flow capacity, and it is recommended to use a high-pressure oil filter with a housing.
3. The return pipe passes through the filter, and its purpose is to filter out the dirt in the system before returning the system oil to the tank to ensure that the oil in the tank is clean. The filtration accuracy is generally 10-50μm. In this filtration method, the filter may be blocked, which in turn blocks the hydraulic components of the system. A return filter with a bypass valve is recommended. In addition, when the oil is suddenly switched on at high pressure, there will be an impact, so a filter with a large flow rate should be selected. If the pressure is too large, the back pressure valve should be added to protect the filter.
4, bypass filter, the filter is a filter composed of filters and small pumps independent of the hydraulic system outside the filter device, not affected by the system. For the main system of variable pump, the use of this filtration method can compensate for the reduction of filtration capacity at low flow rates. The bypass filter generally selects about 20% of the main system pump flow rate (max), and the filter accuracy is high.
What are the requirements of the hydraulic system for the filter
2024 05/20
