Plain bearings, bearings that work under sliding friction. Sliding bearings work smoothly, reliably and without noise. Under the condition of liquid lubrication, the sliding surface is separated by the lubricating oil without direct contact, which can also greatly reduce friction loss and surface wear, and the oil film also has a certain ability to absorb vibration. However, the starting frictional resistance is large. The part of the shaft supported by the bearing is called the journal, and the part matching the journal is called the bearing bush. In order to improve the friction properties of the bearing pad surface, a layer of antifriction material cast on its inner surface is called a bearing bush. The materials of the bearing pads and bearing bushes are collectively called sliding bearing materials. The application of sliding bearings is generally under the working conditions of high speed, heavy load, high precision or intermittent work.
When sliding bearings work, sliding friction occurs; the magnitude of rolling friction depends mainly on the manufacturing accuracy; and the magnitude of friction of sliding bearings depends mainly on the material of the sliding surface of the bearing. General working surfaces of sliding bearings have a self-lubricating function; sliding bearings are divided into non-metal sliding bearings and metal sliding bearings according to their materials. Non-metallic sliding bearings are mainly plastic bearings. Plastic bearings are generally made of engineering plastics with better performance; more professional manufacturers generally have engineering plastics self-lubricating modification technology, through fibers, special lubricants, glass beads Wait for the self-lubricating enhancement modification of engineering plastics to achieve a certain performance, and then use modified plastics to process self-lubricating plastic bearings through injection molding.
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