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How to classify the filter element for hydraulic filter? Hydraulic filter element has what type, 1, filter classification: according to the accuracy of the filter is divided into: coarse filter, ordinary filter, fine filter, fine filter; According to the type of filter element is divided into: mesh filter, line gap filter, paper core filter, sintered filter, magnetic filter; according to the type of filter material is divided into: surface type, depth type. 2. The installation position of the filter: 1) the filter is installed on the oil suction pipe of the hydraulic pump, which requires the filter to have larger oil flow capacity and smaller resistance, so the coarse filter with lower filtering precision is generally used to protect the hydraulic pump. 2) the filter is installed on the oil return pipeline, which can often remove impurities in the oil. To prevent filter blockage, oil can still flow smoothly back to the tank, should be parallel to a safety valve. Lower strength filters are available due to low return pipe pressure. 3) installed in the hydraulic pump oil pipeline, such installation can protect the hydraulic pump and relief valve other than other components. Precision filters are generally used. Because the filter works under high pressure, the filter element and the shell should be able to withstand the working pressure and impact pressure of the system. In order to prevent pump overload or filter core damage when the filter is blocked, a blocking indicating device or a parallel safety valve can be arranged on the pressure oil circuit. 4) before the important element, in front of the important element, may install the separate fine filter according to the need, in order to ensure these element normal work.
What are the maintenance methods of hydraulic oil filter element? 1, before changing, first let go of the original hydraulic oil, check back oil filter, oil suction filter, pilot filter, see if there are iron filings copper or other impurities, if there may be hydraulic components failure, after repair removal, cleaning system. 2, when changing hydraulic oil must replace all hydraulic oil filter element (return oil filter element, oil suction filter element, pilot filter element) , otherwise equivalent to no change. 3, distinguish the hydraulic oil label, different labels, different brands of hydraulic oil is not mixed, may react with deterioration resulting in FLOC. It is recommended that the excavator be used to specify the oil. 4, before refueling must be installed on the oil-absorbing filter, oil-absorbing filter covered by the mouth of the pipe directly to the main pump, into the impurities will accelerate the main pump wear, heavy pump. 5, refueling to the standard position, the hydraulic tank is generally there are oil level table, look at the level table. The Xinxiang Hite filter cautions against parking in which all cylinders are retracted, i. e. forearms and bucket fully extended and on the ground. 6, after refueling attention to the main pump to exhaust air, otherwise light temporarily no action, the main pump abnormal sound (Air Sonic Boom) , heavy cavitation damage the main pump. The method of exhausting air is to loosen the pipe joint directly on the top of the main pump and then fill it directly.