The choice of oil and gas lubrication and oil mist lubrication

The choice of oil and gas lubrication and oil mist lubrication - 2019 06 - 12 for often encountered in the design of high speed spindle bearing parts of the lubrication method choice, most designers problems in choosing 'lubrication oil and gas or oil mist lubrication, this article mainly from the perspective of theory + practice demonstration lubrication oil and gas and oil mist lubrication pros and cons, recommendations for design choice or technical sales. The primary difference between oil and gas lubrication with oil mist lubrication is to supply the bearing lubricating oil is not atomization, but in granular compressed air into the oil bearing, only is the air emissions into the atmosphere, so there is no pollution to the environment. Has a certain pressure of lubricating oil in addition to the lubrication at the contact point and take away heat and sealing role. Because of the oil droplets is shot out, so it can penetrate at high speed due to the effect of centrifugal force air vortices around the bearing, achieve the purpose of lubrication bearings. Oil and gas lubrication with plenty of compressed air to cool the bearing, makes the bearing temperature rise is much lower than the oil mist lubrication. Experiments show that the use of lubrication oil and gas bearing temperature rise than lower 5 ~ 80 ℃, when using grease lubrication oil mist lubrication reduce 9 ~ 160 ℃, with the increase of DMN, cooling effect is more obvious. （ The above data is according to the data provided by the SKF and LUBE analysis) 。 Case analysis: vertical machining center lubrication system is to ensure that the necessary conditions and mechanical movement smoothly. All movement between parts contacting with oil lubrication is need protection, no lubrication system of machine tool, the service life of machine tools and precision will be affected by a lot of. So to see the machine oil lubrication system is necessary. Vertical machining center is the use of compressed air in the pipe flow, drive along the pipeline caused by continuous lubricating oil flow, mixing and transportation of oil and gas to machining center spindle part and screw other parts that need lubrication. Vertical machining center of lubrication in accordance with its working method a is divided into points than lubrication and centralized lubrication two kinds. Scattered lubrication refers to the processing center of the lubrication points with independence, scattered the lubrication equipment lubrication; Around the lubrication refers to the use of a unified lubricating system for lubrication more lubrication points. Lubricating medium is different, on time on the machine tool lubrication and can be divided into oil lubrication and grease lubrication two kinds, including lubrication oil is divided into oil drip lubrication, oil bath lubrication ( Including the splash lubrication oil lubrication and oil pool) , oil mist lubrication, circulating oil lubrication and oil lubrication, etc. Vertical machining center as well as the similarities and differences of oil and gas lubrication with oil mist lubrication points: 1, in the vertical machining center, using grease and lubrication oil circulation will produce abnormal heating area; 2, as a main shaft, need high cleaning, airtight place high speed bearing. At the same time, we also should pay attention to some details: currently on the market a wide variety of lubricating oil, the quality of the good and bad are intermingled, we should choose less impurity high purity of lubricating oil. Machine tools in use after a period of time, want to regular cleaning of the filter, filter to avoid congestion, which in turn cause filter in under the action of hydraulic fracture failure. The characteristics of centralized lubrication system of oil and gas vertical machining center 1, environmental protection, no pollution. Because there will be no oil pollution and fog, the environment is not polluted; 2, oil supply accurate. May be increased by regulating valve, the oil according to different needs to the spindle and screw lubrication points; 3, there is no high viscosity lubricating oil atomization difficult problem; Suitable for any product; 4, the automatic detection and monitoring. Can detect whether the lubricating oil is normal, if bad lubrication, can alarm downtime, and avoid improper operation. 5, especially suitable for high speed spindle rolling bearing, has a certain air cooling effect, can reduce the operating temperature of the bearing, so as to prolong the service life of main shaft; 6, fuel consumption is small, cost savings. ( Graphic)