What bearing classification!
1. Incomplete fluid lubrication bearing
Generally use grease, oil and drip in the form rope lubrication, shaft and roller bearing housing surface are not enough lubricant, the liquid film is not continuous. Simple structure, a large friction factor, wear large.
(1) Journal Bearings
a. Integral
The gap between the shaft and bearing can not be adjusted, simple structure, can only be attached and detached from the shaft journal. Generally used for low-speed, light-load and allows assembly and disassembly of the machine.
b. Split
The gap between the shaft and bearing can be adjusted, easy to install. When the machine disassembly difficult, often used in this way.
c. the appropriate pad can swing bearing housing to accommodate shaft deflection when the bending generated. There shaft deflection for the occasion, in which the joint bearings for mutual swing of the rod junction of radial load.
(2) thrust sliding bearing
Common plane thrust bearing, due to lack of fluid friction conditions, and in an incomplete state of fluid lubrication, to be used simultaneously with the radial bearings. For axial force of the occasion.
(3) bearing powder metallurgy (oil bearing)
Porous, oil stored in the pores, in a long period of time without the addition of lubricants and automatic lubrication, guaranteed to work, but because of its relatively soft material, it is subjected to a lower load capacity. For light load, low-speed and easy refueling situation.
(4) plastic bearings
Compared with DU-S Stainless steel backing sleeve bushing, plastic bearings light weight, easy to maintain. Chemical stability, wear resistance and fatigue strength, and has damping, sound absorption, self-lubricating, insulating and self-extinguishing. However, the thermal expansion coefficient, low thermal conductivity, moisture absorption greater strength and dimensional stability better than metal. For high speed is not a good place or heat dissipation, operating temperature should not exceed 65 ℃, instantaneous temperature does not exceed 80 ℃.
(5) Rubber Bearings
Can absorb vibration and impact, there are impurities in the environment wear and corrosion resistance, but the low unit strength than metal poor heat resistance, not suitable for use at high temperatures and organic solvents and oils or contact environment. For ships bearing shaft tube shall vibration and corrosive environments.
(6) bearing wood
DU-W thrust washer lightweight and inexpensive, can absorb impact, small shaft deflection sensitivity, but low strength, thermal conductivity and moisture resistance, abrasion resistance is poor. For light load shall vibration conditions, such as agricultural machinery disc harrow bearings, large grain ore pump bearings.
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Yilecicad replied
496 weeks ago