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 repair methods:
1. Hydraulic pump oil supply form Straight shaft swash plate pressure for the type of self-priming oil-type plug-cylinder force. 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. A group of the first column at the first rod trimming at a uniform size trim, and then over 1000 # diameter outside the sand throwing paper.
(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 crystalline state non-prepared film or coating.
Because the inner wall of the cylinder bore has a special quality of this material, so it can be composed of hard - hard match the blind blind fruit. Vice ground grinding cylinder hole, the cylinder hole wall of this layer off the material surface, friction, more structural properties also changed the layer coated to go. Of the friction pair, if forced to use, it will wear sharp degree of warm surface friction, piston rod and cylinder bore gluing occurs. In addition, a special film coating is prepared on the surface of the rod, and the coating contains anti-wear + anti-wear + lubricated grinding. This can be applied to the actual or the hard- Also destroyed the best pair of friction materials, especially those special repair, special plunger pump, it is necessary to send a professional repair shop.
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