Classification structure and installation of Oil Filter
Oil filters can be divided into paper oil filters, sintered oil filters, mesh oil filters, line gap oil filters and so on.
picture 1. Paper oil filter
The filter core is a paper core made of plain or corrugated phenolic resin or wood pulp microporous filter paper, and the paper core is surrounded on a skeleton made of tin-coated iron with holes to increase strength. In order to increase the filtering area, the paper core is generally folded. Its high filtration accuracy is generally used for fine filtration of oil, but it can not be cleaned after plugging, and the filter element must be replaced frequently.
2. Sintered oil filter
The sintered oil filter, whose filter element is sintered from metal powder, uses micropores between particles to block the passage of impurities in the oil. The filter element can withstand high pressure, good corrosion resistance, high filtration accuracy, suitable for high pressure, high temperature hydraulic system requiring fine filtration.
3. Mesh oil filter
Mesh oil filter, the filter element with copper mesh as the filter material, in the surrounding open a very porous plastic or metal tubular skeleton, wrapped in one or two layers of copper wire mesh, the filtration accuracy depends on the number of copper mesh layers and the size of the mesh. The oil filter has the advantages of simple structure, large flow capacity, convenient cleaning, but low filtration accuracy, and is generally used in the oil suction port of hydraulic pump.
4, line gap type oil filter
Wire gap type oil filter, with steel wire or aluminum wire tightly wound on the outside of the cylindrical skeleton to form a filter element, relying on the small gap between the copper wire to filter out impurities mixed in the liquid. Its structure is simple, the flow capacity is large, the filtration accuracy is higher than the mesh type oil filter, but it is not easy to clean, and most of it is the Return Oil Filter.
The structure of the oil filter is simple, its role is to prevent the suction of large particles of pollutants into the pump, generally using low-precision filter element, the highest filtration accuracy is not more than 30-50um, in order to facilitate maintenance should be installed on the top or side of the oil filter, should also consider its flow capacity should be more than twice the maximum flow of the hydraulic pump to prevent the pump will be empty.
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The oil filter installation method is also simple:
② The Hydraulic Oil Filter is installed in the downstream pressure pipeline of the hydraulic pump to deliver clean pressure oil to the hydraulic system, usually a high-precision oil filter is selected, the filtration accuracy is 3 to 20um, and its flow capacity should not be less than the maximum flow of the pressure oil circuit.
③ The return oil filter is installed after the total return oil pipe, and the pollutants generated by the external intrusion system and the system are filtered, and the high-precision oil filter is usually used. According to the recent pollution control system theory, the oil in the tank should reach a certain cleanliness level, and in order to prevent the filter element from being blocked and causing the pressure before and after the oil filter to exceed the standard, the filter element should be installed to block the transmitter in order to replace the filter element in time.
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