| What are the characteristics of rolling bearings and plain bearings? |
| 发布日期：2019-07-27 23:55:00 点击数：4009 次 新闻来源： |
| What are the characteristics of rolling bearings and plain bearings? The rolling bearing is easy to use and maintain, reliable in operation, good in starting performance and high in carrying capacity at medium speed. Compared with the sliding bearing, the radial dimension of the rolling bearing is large, the damping capacity is poor, the life at low speed is low, and the sound is loud. The radial bearing (mainly subjected to radial forces) in a rolling bearing is usually composed of an inner ring, an outer ring, a rolling element and a rolling element cage 4 portion. The inner ring is tightly fitted over the journal and rotates with the shaft, and the outer ring is mounted in the bearing housing bore. A raceway is formed on the outer circumference of the inner ring and the inner circumference of the outer ring. When the inner and outer rings are relatively rotated, the rolling elements roll on the raceways of the inner and outer rings, which are separated by the cage to avoid mutual friction. The thrust bearing is divided into two parts: a tight ring and a live ring. The tight ring and the sleeve are tight, and the ring is supported on the bearing housing. The ferrule and the rolling element are usually made of rolling bearing steel with high strength and good wear resistance. The surface hardness after quenching should reach HRC60-65. The cage is made of soft steel stamping, and can also be made of copper alloy cloth bakelite or plastic. The difference between the rolling bearing and the sliding bearing is firstly expressed in the structure. The rolling bearing supports the rotating shaft by the rotation of the rolling element, so the contact part is a point. The more rolling elements, the more the contact points are. The sliding bearing is smooth. To support the rotating shaft, so the contact portion is a face. Secondly, the movement mode is different. The movement mode of the rolling bearing is rolling; the sliding bearing movement mode is sliding, so the friction situation is completely different. |
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