Hydraulic pump maintenance methods precautions

Hydraulic pump system efficiency depends on the volumetric efficiency of the hydraulic pump, when the volumetric efficiency dropped to 72%, you need to carry out routine maintenance, replacement of bearings and aging seals, but also to repair excess friction with the clearance or replacement parts, Its performance has been restored. Hydraulic pump maintenance methods: 1. The form of oil supply pump Direct-axis swash plate pressure for the type of self-sucking oil-type plug-cylinder force of two. For large pump pressure liquid pressure oil tank are used, there are hydraulic pumps make up with the sub-pump to the hydraulic pump inlet pressure of the liquid oil-based oil sucked. Pump self-priming oil capacity is strong, no external oil supply. If it is found that the hydraulic cylinder speed or boring should be, when the car on the hydraulic pump repair, check whether the edge of the impeller scraping is like, whether the internal gear pump clearance is too large. For self-priming fluid, the oil in the plug-type pressure tank shall not be lower than the lower limit of the fuel gauge to maintain the hydraulic oil quantity and quantity. The more fluid cleanliness of the pump fluid, high life expectancy. 2. Hydraulic pump bearing plunger pump is the most important part of the bearing, if the bearing appears clearance, you can not ensure that the Department of internal pressure pump three pairs of friction normal clearance, but also Vice-rub each broken The hydrostatic bearing oil film thickness, reduce the plunger bearing bearing pump life. According to the information provided by the hydraulic pump manufacturer bearing shaft, the service life of 10000h, more than the need to change the value of the new port. Shaft to unload bearing, there is no professional testing equipment is unable to detect gap travel bearing out, can only be used for visual inspection, such as roller table change or mark scratching look, it must be replaced. In the more should be replaced when bearing bearing the original bearing the English letters and models, the column bearing bearing large bearing capacity with large bearing capacity, it is best to buy the original rules of the original factory products, if the replacement of another brand, There should be a bearing on the experience of teaching staff look-up table swap, the purpose is to maintain the same degree of precision bearing-level and load capacity. 3. Three pairs of inspection and Vice-scrub repair (1) Cylinder copper installed inlay body, you can use the method of replacement copper sleeve repair. Column group a first rod at the first trimming rod diameter trim to a uniform size, and then use more than 1000 # outside diameter light throwing paper sand. (2) Molten cylinder type square junction body and copper sleeve. (3) Face table "with mining technology (4) Cylinder hole non-material cylinder sleeve copper material is mostly ductile iron, in the cylinder wall state crystal non-prepared film or coating.Because the cylinder bore wall with This special quality of the material, so we can form a hard - hard pair of rubbing the blind fruit such as. Deputy ground cylinder hole, the hole wall of the cylinder material out of the material surface, the friction of the more structural performance will change Layer coating to be friction pair, if forced to use, it will wear a sharp degree of warm surface wipe high, the plunger rod and cylinder bore glued together. In addition, Layer, the coating contains anti-wear + wear-resistant + wear-resistant grinding group which can be erased practical or hard-soft pair, once people, change layer will also destroy the best pair of friction materials, Repair, special plunger pump, it is necessary to send a professional repair shop.