Many users will have some faults after using the centrifugal oil pump for a period of time, most of which are the faults of the impeller of the centrifugal oil pump. The following is a simple solution:
1: copper wire repair method (for copper impeller)
According to different material impeller common repair methods mainly include the following:
To do a good job in the maintenance of centrifugal pump impeller, we must first understand the impeller material. The common impeller material is determined by combining the medium with the pump structure type. There are many kinds of impeller materials. After welding, use file to process and repair according to the original contour line.
2: gas welding repair method
Single stage single suction centrifugal pump is a kind of adhesive repair agent before curing, which has high strength, high hardness, no shrinkage and no rust after curing. It is suitable for filling and repairing pores, cracks, trachomere and other places of steel, iron and other metal materials, with strong adhesive effect. Make sure that the blade surface is smooth and smooth when brushing the last time.
3: epoxy resin repair method
For pinhole cavitation, as long as the hole is not connected into a piece, can use copper wire pinhole, file light. After the epoxy resin is completely cured, use a file or grinder to trim the contour line of the impeller and the bumps on the surface layer.
The impeller is heated to 400-500 deG C on charcoal, and tin is hung in the repair welding place, and then the brass wire is melted into the groove or hole that needs to be repaired with oxygen acetylene flame. After welding, charcoal is removed, covered with asbestos plate insulation, so that the blade is cooled slowly, so as not to produce cracks.
4: quick steel repair method
Take appropriate amount of epoxy resin, ethylenediamine, dibutyl phthalate and acetone and mix them in glass ware according to the proportion and the order of heat preservation gear pump. Dip a wool brush into the epoxy resin and brush the sand holes and pores on the surface of the blade. When brushing, gently squeeze out the bubbles in the middle of the sand holes and pores with a sharp cone, and try to evenly coat them as much as possible. At the same time, gently scrape and compress them with a scraper. Take out the colloid in the rapid steel plastic tube, and knead the colloid inner core and outer skin of two different colors into one color quickly and fully (about 1 ~ 2min), to warm soft as well. When mixing, pay attention to the viscosity of the adhesive and add acetone dosage. After hardening, quick steel is filed flat. It is best to use up the prepared epoxy resin in 20-30 minutes. After curing with epoxy resin 1-2h, brush and smear 2 ~ 3 times. After painting, the impeller is placed in 20-30℃ and low relative humidity environment, and slowly curing for 48h. Before repair, the floating rust, dirt, etc. around the intended repair place should be cleaned up and roughened. Before treatment, use a polishing machine to remove rust and dirt on the surface of the blade, and then use oxygen acetylene flame to blow away debris in the pores, and then fill the hole with copper wire of appropriate thickness, at the same time with a sharp hammer, the copper wire extrusion, extrusion into the hole, and finally file. Before the rapid steel colloid to solidify, forcibly stick to the repair, and with the colloid solidification process force (hand or tool) multiple compaction, enhance the adhesive and blade adhesion. Such as cast iron, cast steel, stainless steel, cast copper, etc., there are many specific grades in each category. After long-term use of centrifugal oil pump, because the medium will contain trace impurities, friction with the impeller will appear wear damage to different degrees of damage, so the repair of centrifugal oil pump impeller is also part of the maintenance work.
