Basic knowledge of bearing cooperation

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Basic knowledge of bearing cooperation

Source: China Bearing Network Time: 2014-03-28

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The cooperation of the bearing refers to the cooperation between the inner ring and the journal and the outer ring and the outer casing hole. The inner and outer rings of the bearing are generally considered to be thin-walled parts according to their scale; simple deformation, when it is fitted to the outer casing hole or After the shaft; the out-of-roundness of the inner and outer rings; will be affected by the shape of the shell hole and the journal.
Selection of bearing cooperation varieties. Ω 葜岢 睦嘈 睦嘈 叽纭 叽纭 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 16 The shaft, the outer ring and the outer casing hole undergo a relative change in operation. Generally speaking; when the direction of the working load is constant; the transition ring should have a tighter cooperation than the fixed ring; because the transformation team accepts the rotating load; The part of the load is accepted without moving the picture. When the higher the speed, the larger the load and the more intense the oscillation, a tighter cooperation should be used. When the bearing equipment is on a thin-walled casing or hollow shaft, it should also be tight. Cooperation. However, the tight cooperation is suffocating. At this time, the internal clearance of the bearing can be reduced or even completely disappeared due to the elastic expansion of the inner ring and the shortening of the outer ring. It can also be due to the cooperation of the shaft and the hole surface. The irregular shape or uneven rigidity causes irregular deformation of the inner and outer rings of the bearing; these will damage the normal operation of the bearing. The tight cooperation will also make the assembly and disassembly difficult; especially regarding heavy machinery.
The cooperation between the split type outer casing and the bearing outer ring; looser cooperation should be adopted. When the outer ring of the required bearing can swim in the axial direction during operation; the cooperation between the outer ring and the outer casing hole should also be loose; Should not let the outer ring can be transformed in the hole of the shell. The loose cooperation is the helium of the rotating precision of the improved bearing and the reduction of the oscillation.
If there is a large temperature change during the operation of the machine; then; the operating temperature will change the cooperative nature. When the bearing is in operation; as for the usual working machine; the temperature of the ferrule is often higher than the temperature of its adjacent parts. The inner ring of the bearing can be loosened with the shaft due to thermal expansion; the outer ring can be expanded with the outer casing hole due to thermal expansion; then the support loss of the outer ring having the axial swimming function can be made. Therefore, When selecting cooperation, it is necessary to carefully consider the temperature difference of each part of the bearing equipment and the direction of its heat conduction.

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