The filter in the hydraulic system is called the oil filter. For details, please refer to the entry: Oil Filter
Hydraulic oil often contains particulate impurities, will cause the relative movement of the hydraulic components of the surface wear and tear, slide valve stuck, throttle orifice blocked, the system reliability greatly reduced. In the system to install a certain accuracy of the oil filter is to ensure that the filter material and structure, the oil filter can be divided into net-type, gap-type, paper filter type, sintered oil filter and magnetic oil filter, etc. . According to the location of the different oil filter can also be divided into suction filter, filter and return oil filter, taking into account the self-priming pump performance, oil filter for the coarse filter.
(1) network filter
Net filter, the filter to copper mesh for the filter material, in the surrounding open a lot of holes in the plastic or metal cylindrical skeleton, wrapped in one or two layers of copper wire mesh, the filter depends on the number of layers of copper mesh And the size of the mesh. This filter is simple structure, flow capacity, easy to clean, but the filtration accuracy is low, generally used for hydraulic pump suction port.
(2) line-type oil filter
Line-type oil filter, wire or aluminum wire tightly around the outside of the cylindrical skeleton to form the filter, relying on a small gap between the copper wire mixed with impurities in the liquid filter. Its structure is simple, the ability to flow, filter precision than the net filter high, but not easy to clean, mostly for the return oil filter.
(3) paper filter
Paper filter, the filter is plain or corrugated phenolic resin or wood pulp microporous paper made of paper core, the paper core around the hole in the tin made of iron skeleton to increase the strength. To increase the filter area, paper core is generally made of folded shape. Its high filtration precision, generally used for fine filtration of oil, but can not be cleaned after plugging, the filter must be replaced frequently.
(4) sintered oil filter
Sintered oil filter, the filter with metal powder sintered, the use of particles between the pores to block the impurities in the oil through. The filter can withstand high pressure, good corrosion resistance, high filtration precision, fine filter for high pressure, high temperature hydraulic system. Hydraulic system to work properly the necessary means.
