Rolling bearing and sliding bearing

Sliding bearing sliding bearing ( slidingbearing) , work under sliding friction bearings. Sliding bearing work steady, reliable, no noise sliding bearing under the condition of fluid lubrication, sliding surface is lubricating oil without direct contact, also can greatly reduce the friction loss and wear of surface oil film also has a certain vibration absorbing ability. But starting frictional resistance is bigger. The bearing parts of the shaft are called journal, and shaft neck matching parts called bush. In order to improve the bearing surface of the friction properties and in them on the surface of cast anti-friction material layer is called the bearing bush. Bearing and bearing liner material collectively known as the sliding bearing material. The sliding bearing material with the commonly used bearing alloy ( Also called babbit or white metal) , wear resistant cast iron, copper and aluminum alloy, powder metallurgy material, plastic, rubber, hardwood and carbon - Graphite, ptfe ( PTFE） , modified polyformaldehyde ( POM） , etc. Sliding bearing applications generally under the condition of low speed and heavy loading conditions, or maintenance and charging of lubricating oil is difficult work. Will run between shaft and shaft seat sliding friction into rolling friction, thereby reducing friction loss of a precision mechanical components, called rolling bearing ( rollingbearing) 。 Generally by the outer ring, rolling bearing inner ring, rolling element and cage. Is the role of the inner ring and shaft match with the shaft rotation, outer ring is used to match the bearing seat, a support role, rolling body is with the aid of maintains a uniform distribution of the rolling element between inner ring and outer ring, its shape size and quantity directly influence the using performance and life of rolling bearings, maintain uniform distribution can make the roller, prevent fall off, roller guide roller rotation lubrication. Rolling bearings rolling bearing is convenient in operation and maintenance, reliable operation, good starting performance, bearing capacity is higher under the moderate speed. Rolling bearings rolling bearing and sliding bearing radial size is larger, vibration reduction ability is poor, high speed when life is low, noise is larger. The centripetal bearing of rolling bearing ( Mainly bear radial force) Usually consists of inner ring and outer ring, rolling body and rolling body cage of four parts. Inner ring tight set on the shaft neck and with shaft rotation, outer ring is installed in the bearing hole. Within the peripheral and outer ring, ring week all have a race. When the relative rotation on inner and outer, namely, outer ring rolling on the rolling roller, they are separated by the cage, avoid rubbing against each other. Thrust bearing ring and the living circle. Ring and shaft sleeve, living circle bearing on the bearing seat. Ring and rolling body usually adopt high strength, good abrasion resistance of rolling bearing steel manufacturing, surface hardness after quenching should reach HRC60 ~ 65. Maintains a multi-purpose made from mild steel stamping, also can use copper alloy fabric bakelite and plastic manufacturing. Compared with sliding bearing and rolling bearing sliding bearing of advantages: 1, the friction coefficient is big, more power consumption. 2, is not suitable for mass production, compatibility is not good, not easy to install, disassembly and maintenance. 3, internal clearance is big, the machining accuracy is not high. 4, low transmission efficiency, calorific value is big, lubrication maintenance is not convenient, use lubricant. 5, load, speed and working temperature to adapt to the narrow scope, working condition of a small amount of change, the influence on the performance of the bearing. 6, can't bear radial and axial load at the same time. Sliding bearing the advantages of: 1, with an equal volume of rolling bearing load power is much bigger. 2, small vibration and noise, used in precision demand is high, and there is no vibration of the occasion. 3, the effects on the metal foreign body small, not easy to produce the early damage.