Is the ultra high speed spindle suitable for sliding bearings?
The answer is yes. According to the different lubrication principle, the sliding bearing is divided into oilless lubrication bearing, powder metallurgy oil bearing, dynamic pressure bearing and hydrostatic bearing. Over the years, more and more bearings are used in the high-speed spindle system at home and abroad, mainly magnetic suspension bearings, hybrid bearings and hybrid ceramic bearings. Bearing is a comprehensive dynamic model of multi oil based oil film bearing pressure bearing and hydrostatic bearing has the advantages of high speed, avoid bearing serious heat and oil supply system is large and complex, to overcome the possible dynamic pressure start stop of dry friction and weakness, good performance and high speed, wide speed range is suitable for high power, rough machining, and is suitable for high speed finishing.
4. thrust plain bearings (understood)(1) the thrust bearing fixed and tilting.(2) the thrust surface of thrust bearing can use the end face of the shaft, or can make a convex shoulder or thrust the disc in the middle of the shaft(two) types and characteristics of rolling bearings1. classification of rolling bearingsAccording to the shape of the rolling body is divided into: ball bearings, roller bearings2. characteristics of rolling bearings(1) advantages:Compared with plain bearings, rolling bearings have the advantages of small frictional resistance, quick starting, high efficiency, simple lubrication and easy replacement(2) shortcomings:Low impact resistance, noise at high speed, and less working life than liquid lubricated sliding bearings.
(1) types and characteristics of plain bearings1. the sliding bearings are divided according to the load:(1) radial sliding bearing (radial sliding bearing), mainly bearing radial load;(2) thrust bearings are mainly subjected to axial load2. sliding bearings are suitable for low speed, high precision, heavy load and structural requirements. They are also used in low speed and impact occasions3. center journal bearing(1) integral type and split fractionThe splitting is usually made up of bearing cap, bearing seat, bearing bush and connecting bolt(2) the Bush is the key part in the bearingBearing materials should have small coefficient of friction, good thermal conductivity, small coefficient of thermal expansion, wear resistance, corrosion resistance, anti scuffing ability, sufficient mechanical strength and plasticity(3) requirements for bearing materials: bearing alloy (Babbitt), bronze, bearing materials of special properties, etc.
