Performance comparison of sliding bearings in different friction (lubricating) statesBearing performanceDynamic pressure bearingsHydrostatic bearingsOil-impregnated bearingsDry friction bearingsRolling bearingsLoading characteristicsRunning performanceDamping medium~large smallMinimum minimum starting torque medium~large minimum maximum maximum minimum power consumptionSmall ～Large, proportional to lubricant viscosity and rotational speed Min～Medium, proportional to lubricant viscosity and rotational speed, in addition, the pump power consumption is large, which has a greater relationship with the load, and has a greater relationship with the bearing material. Small rotation High precision, high, medium, high, running noise is very small. The bearing itself is very small, but the pump has very little noise. Under stable load, it is small. Small to medium operating life and limited life. It depends on the number of starts and unlimited life. Abrasion limited life environment adaptability High temperature temperature limit depends on the oxidation resistance of lubricant or bearing material temperature limit depends on lubricant oxidation resistance Temperature limit depends on bearing material low temperature temperature limit depends on starting torque Temperature limit depends on bearing bush Material> 30 ℃ Vacuum is normal, but it is better to use special lubricant, but it is better to use special lubricant to be wet, pay attention to sealing, journal and bearing material must be generally corrosion-resistant, pay attention to sealing dust, pay attention to the sealing of lubrication system Good filtration with lubricants, pay attention to lubricating system seals and lubricant filtration in general, pay attention to good sealing, better sealing in general, must be carefully sealed Radiation is restricted by lubricants is restricted by lubricants Movement adaptation performance is poor in frequent starting and poor in frequent reversing. Very good Swing not possible Manufacturable Maintenance performance Poor sensitivity to manufacturing and assembly errors Poor medium Good medium , The lubricating device is complex and simple, the oil consumption is small, no need to lubricate Most of them are simple, the amount of lubricant is limited, the maintenance is frequently checked, the lubrication system is cleaned regularly and the lubricating oil is replaced regularly. The lubricating oil is replenished without maintenance. The cost is determined by the low and low cost of the lubrication system