The characteristics of sliding bearing and preloaded

Bearing durable - at ease Self-aligning roller bearing electricity department author for your explanation: the characteristics of sliding bearing and preloaded role: bearing supporting shaft parts, according to the nature of the work of friction, bearing can be divided into sliding friction bearing ( Referred to as the sliding bearing) And rolling friction bearing ( Referred to as rolling bearings) Two categories. And each kind of bearing, according to its load of different direction, and can be divided into the centripetal bearing, thrust bearing and angular contact bearings, etc. A, 1 sliding bearing. Sliding bearing the characteristics of the sliding bearing work smoothly, the rolling bearing noise is low, reliable work. If can ensure that the oil film of sliding surface is separated without contact, can greatly reduce the friction loss and the surface wear. However, sliding bearing, starting frictional resistance. 2. The application of sliding bearing (1) particularly high working speed of the bearing, such as grinding machine spindle; (2) carry great shock and vibration load bearing, such as rolling mill roll; (3) require special precision bearing; (4) assembly process requiring bearing subdivision, such as the crankshaft bearing; (5) for the radial size of bearing the characteristics of sliding bearing and preloaded role: preloaded, refers to the bearing load before, through changing the relative position of inner and outer ring, make bearing clearance usage. For household appliances bearing preloaded main role is to improve the bearing stiffness, vibration noise control. Preloaded bearing noise impact bearing the radial load, due to the radial clearance, only part of the steel ball load ( Figure in the ABC) , known as the bearing area, the other is called the bearing section. In steel ball bearing the D motion from a to D ', in the process of steel ball size and direction of gravity and centrifugal force change constantly, steel ball collisions with inner and outer ring raceway alternately, thus bearing internal produce different sound. This kind of different sound can be avoided through the bearing preloaded. But a pretightening ambassador bearing friction increases, the temperature rise, the noise of the bearing life. So is very important to choose suitable pre-tightening force. Common dust cover and sealing ring structure as shown in the figure below. Dust cover ( ZZ） Made of steel sheet stamping, covered with rubber sealing ring by steel plate. Among them, the sealing ring is divided into non-contact ( VV） And contact ( DDU、DDW） Two kinds. Bearing comfortable and durable, )