How does the bearing seat fit with the shaft and the bearings?
Bearing (Bearing) is an important component of modern mechanical equipment. Its main function is to support the mechanical rotating body, reduce its friction coefficient (friction, coefficient) during movement, and guarantee its rotary accuracy (accuracy).According to the friction property of the moving element, the bearings can be divided into two kinds: rolling bearing and sliding bearing. Among them, the rolling bearing has been standardized and serialized, but compared with the sliding bearing, its radial dimensions, vibration and noise are relatively large, and the price is higher.Generally, the rolling bearings are composed of four parts, namely, outer ring, inner ring, roller and cage. Strictly speaking, the rolling bearings are composed of six big parts, namely, outer ring, inner ring, rolling body, cage, seal and lubricating oil. Mainly with the outer ring, inner ring, rolling body can be defined as rolling bearings. According to the shape of the rolling element, the rolling bearings are divided into two major categories: ball bearings and roller bearings.
Under normal circumstances (plain bearings);The bearing block is a fixed bearing, generally installed on a fixed base.The bearing is installed in the bearing seat and the outer ring will not move.The shaft is installed in the inner ring of the bearing and is tightly matched with the inner ring.The inner ring of the shaft and bearing is moving, while the others are not moving.
Know from some relevant information, in order to give full play to the role and performance of the bearing and shaft and the inner ring and outer ring and with the bearing seat and the bearing seat and the outer ring of the match must be appropriate if the run time matched position gap between the shaft and the inner ring may lead to (or between the outer ring and bearing seat) dislocation. Creep must occur. It's hard to stop. This will cause a noticeable wear on the mating face and cause damage to the bearings, shafts, and bearing housings. Moreover, the heat generated by sliding causes temperature to rise, causing bearing burns, and even lubricant burning. When assembling the shaft and the hole, the interference fit or the clearance should be engaged to ensure the flexibility of the movement, and the size relation of the fitting parts is the fit. An interference fit.
