Oil sintered bearing characteristics of explanation
2015-10-08
Oil bearing characteristics
Made of porous material and pore of sliding bearing with embellish lub oil storage.Porous material and the thermal expansion coefficient of lubricating oil is different, so the work of oil from the hole JDB cast iron surface embedded in the bearing gap is in conflict, suspend work oil temperature drop again sucked back into the pore.Oil bearing with low cost and can absorb vibration, low noise, the JDB inlaid steel copper bearing characteristics such as long working hours don't need to add lubricant, especially suitable for not easy lubrication or do not allow oil dirt work environment.Porosity is one of the main parameters of oil bearing.Work under high speed, light load of oil bearing pleaded with oil content, high porosity should be;In low speed and load the JDB steel inlaid bearing work under the big oil bearing pleaded with high strength, low porosity.
Oil bearing classification
Oil sintered bearing main materials of porous metal and plastic two categories.Made of porous metal oil bearing, according to the different substrate material divided into iron and copper base.The former high bearing ability, but easily and steel shaft attack agglutination;The allowable velocity is higher, but the price is more expensive.Oil bearing using porous plastic for thermosetting plastics, such as nylon, phenolic resin, etc.Porous plastic oil bearing appearance is very soft, not easy to damage shaft neck and allow greater alignment difference, but the strength and stiffness is smaller than low porous metal oil bearing, bearing ability, poor thermal stability and thermal conductivity.To improve this defect of porous plastic, plastic layer thickness can be thinned as far as possible, to supporting plastic thin layer with metal backing.
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