High-speed bearing grease lubrication of trace

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Trace fat provide the lubrication film such as bearing contact surface can be separated, the bearing can throughout its working speed range to stable low friction torque and low friction heat for continuous operation, because it does not stir for extra lubricant cause liquid fricti on fever, or cause bearing components thermal expansion additional stress, so disposal appropriate, grease lubrication can be used to trace high-speed even high-speed bearing lubrication.
In addition, trace grease lubrication need not measurement and monitoring device or precision injection pipeline and other accessories, also do not produce oil mist, this makes it better than the lubrication oil mist and injection lubrication, not only cheap, and convenient maintenance, especially its lubrication system almost do not take much space and weight, the aviation machinery is very attractive.
Compared with the trace lubricating oil, grease lubrication trace the evaporation of the low speed, less leakage, and higher bearing capacitythe roller bearing company, damping effect better, working temperature low and stable, friction torque and stability, and can sealing function, p revent the liquid and solid dirt into the bearings, fault less, so use trace grease lubrication of spindle, in not maintenance will be running for more than five years, even for ten years. And, because less heat, easy to maintain the precision of the main shaft system.
With low viscosity oil as a base oil soap and manufactured, commonly used to implement trace grease lubrication, the fat has fine fiber by chequer network structure, plays the role of oil storage pool, the way and the oil is very similar to the sintering porous metal bearing, with the aid of the capillary action will provide bearing lubricant, forming the lubrication film thickness to a steady value, then no longer with engine speed increased, so stable friction torque.
To ensure that conditions in high speed achieved successfully trace grease lubrication, have to control the washing, filling grease and run and the three links.
Put before the lubrication, bearing the elements work surface must w ash and dry completely, any remaining original lubricating oil, roller bearing company grease, rust or have to use volatile dissolvent completely remove.
High-speed bearing
The grease filling quantity according to the use of the bearing structure, the working speed, the fuel storage space and seal and dustproof effect factors determine the comprehensive, we must ensure that contact surface have enough oil film thickness, to prevent metals and metal contact, and provide adequate liquid lubrication. Grease itself must also be extremely pure. http://bearing-wiki.com (bearing encyclopedia)
Run closing is the most important of the three links a ring, you must run from low speed and start, when the temperature reaches stable state again gradually improve speed, until the temperature rise quickly when run and stop the phenomenon, in bearing system cooling to room tempera ture, to stop the run before and speed run again close, so constantly repeated ran close, until the work to speed running spindle, under the condition of 35 to 40 ℃ to the thermal equilibrium temperature so far.
If do not have temperature monitor, run and speed should be controlled in the highest working speed the following, running and the velocity increment for 10 r/min, every time growth are operating 15 min, and then cooling to room temperature, so go round and round.
If bearing speed can t change, but will work with running speed spindle 15 min, then stop cold to room temperature, so repeatedly run close, until the thermal equilibrium temperature reached so far.
After a successful run together, in the highest spindle speed work, under the condition of temperature rise of bearing system will be below 10 ℃. For temperature control in so little will, within the scope of the regulation bearing clearance from the need of block laps, or proper choice of rol ler shape and size, so the expands and roll the way after contact with no additional stress.
In run close period, too much grease be forced into the cavity of the bearing, the contact area in bearing leave only trace the right amount of grease lubrication, other contact surface, such as raised edge, pocket of the place such as the oil film hole, through the running-in also get the corresponding appropriate adjustments.
Trace grease lubrication and cooling method such as used in combination, it is possible to increase trace grease lubrication for speed range.slim bearings