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Analysis of the difference between rolling bearing and sliding bearing
Source: China Bearing Network Time: 2018-07-04
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Sliding bearing sliding bearing (sliding bearing); bearing operating under sliding conflict. Sliding bearing operation is smooth, reliable, noise-free sliding bearing under liquid smooth condition; sliding surface is separated by smooth oil without direct touch; can also be greatly reduced Skimming loss and appearance wear; oil film also has a certain vibration-absorbing ability. However, the resistance of starting conflict is large. Some of the shafts are supported by bearings, which are called journals. The parts that are matched with the journals are called bearing bushes. In order to improve the conflicting nature of the bearing surface The anti-friction material layer cast on the inner and outer surfaces is called the bearing lining. The data of the bearing bush and the bearing lining are collectively referred to as the sliding bearing data. The commonly used sliding bearing materials are bearing alloys (also known as babbitt or white alloy) and wear-resistant. Cast iron, copper-based and aluminum-based alloys, powder metallurgy materials, plastics, rubber, hardwood and carbon-graphite; polytetrafluoroethylene (PTFE), modified polyoxymethylene (POM), etc. Sliding bearings are generally used at low speeds and heavy loads. Under working conditions; or it is a difficult working position to protect and fill smooth oil.
The sliding conflict between the axis of the job and the axle seat becomes a roll conflict; then a fine mechanical component that reduces the loss of the collision; called rolling bearing. The rolling bearing is generally made up of the outer ring; the inner ring; the rolling body and the retaining The composition of the inner ring is that the inner ring is matched with the shaft and rotates together with the shaft; the outer ring effect is matched with the bearing seat; the supporting effect is provided; the rolling body is uniformly spread by the cage to spread the inner and outer rings Between the rings; its shape and size directly affect the performance and life of the rolling bearing; the cage can evenly spread the rolling body; prevent the rolling body from falling; guide the rolling body to rotate smooth.
Rolling bearing rolling bearing is easy to use; safe operation; good starting performance; higher bearing capacity at medium speed. Radial scale of rolling bearing with sliding bearing is larger; vibration damping is poor; The movement is larger. The radial bearing in the rolling bearing (primarily receiving the radial force) is generally composed of the inner ring, the outer ring, the rolling body and the roll cage 4. The inner ring is tightly sleeved on the journal and rotates together with the shaft. The outer ring is mounted in the bearing housing bore. The inner circumference of the inner ring and the inner circumference of the outer ring are formed with raceways. When the inner and outer rings are relatively changed; the rolling elements are rolled on the raceways of the inner and outer rings; they are separated by the cage Prevent conflicts with each other. Thrust bearings are divided into tight and live rings. The tight ring and the bushing are tight; the ring is supported on the bearing seat. The ring and the rolling body are generally made of high-strength, wear-resistant rolled bearing steel. After quenching, the hardness of the surface should reach HRC60-65. The cage is made of soft steel stamping; it can also be made of copper alloy cloth bakelite or plastic.
The difference between the rolling bearing and the sliding bearing is mainly in the structure; the rolling bearing is supported by the transition of the rolling body to support the transformation axis; therefore, the touched portion is a point; the more the rolling body; the more the touch point nine, the sliding bearing is smooth The face supports the transformation axis; therefore, the touch site is a face. Secondly, the motion method is different; the motion method of the rolling bearing is tumbling, and the sliding bearing motion method is sliding; therefore, the conflict situation is completely different.
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