Form a manufacturing precision tolerance caused by vibration
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2.1. Install the effect of surface geometric error
Bearing ring raceway roundness, generally around 2 microns, such as the installation of the shape of the surface error is greater than 2 microns - usually with 2 ~ 10 the waviness of the wave, when the bearing ring for interference fit is installed on the surface, the race may suit up 2 ~ 10 waviness, the operation will appear when the vibration of high specific speed 2 ~ 10 times.
If the installation of journal bearing with spline or near tight fit flat key, could also lead to bearing raceway waviness. Installed along the axial surface is not flat or its shoulder the chamfering radius is too large, also can make ring similar similar deformations caused by vibration and noise. Therefore, as in the inspection of the above, at the installation surface must be repair or change to the quality meets the requirements of the matching parts.
2.2 ring and positioning block shoulder is not vertical
When the bearing ring and vertical not positioning block shoulder, as in the circumferential direction for the movable fit, the distorted ring, race into oval, its roundness error is approximately twice the clearance between the ring and installation surface.
2.3 the impact of excessive clamping force
Practice has proved that outer easy deformation and easy affected by excessive clamping force. Outer ring with a hole for the clearance fit normally, with two end cover clamp with axial positioning and prevent micromotion abrasion. When the end cover through the thin, form a great error, clamping force is too large, or the bolt clamping force is not uniform, will make the outer ring produces a large deformation. Due to the clamping ring twist deformation is large, as a result of vibration and noise is also very significant, must ensure that the necessary precision of end cover, and moderately tightened bolt, to reduce the deformation of the outer ring due to the clamping.
2.4 cooperate with too loose on the surface of the bearing and installation
Cooperate with too loose on the surface of the bearing and installation, if occur on the surface of rotating ring and installation (usually axis), between the possible relative to the ring radial motion on the surface of the installation, so as to change the state of equilibrium, the elastic vibration of centrifugal force excitation, even to axial clamping, but the ring to thermal expansion of "creep" approach to the radial imbalance.
If the fixed ring and (usually) is a hole on the surface of the installation with too loose, the weight of the shaft system are more likely to deform the ring, appear all sorts of roundness, if be axial clamping, the deformation is deepening and fixed down, when bearing the deformation is stimulated elastic vibration during operation. In addition, if the outer ring with a hole between the surface too loose, the bearing is easy to get bigger windage, - this will lead to increased alternating elastic vibration. Therefore, in order to avoid this kind of vibration, do not make the bearings with too loose.
2.5 the effect of alignment error
Alignment error and geometrical deviations on the surface of the rolling bearing, shaft and hole of the alignment and shoulder the verticality of the block, but usually is given priority to with the latter, the error of the bearing itself is relatively much smaller. For ball bearing, the alignment error has significant effects on its basic rotation error, and the resulting vibration associated with rotation speed.
234407BM 234706BM 234406BM 517/2860V/YA 5610/2500 517/1720X1V 527/1181M 510/1180M 517/930 510/670 590/560 510/500 52780 59080 517/368M 51760U 517/238 6207-2ZN 6206-2ZN 6205-2ZN 6204-2ZN 6203-RZ 6203-2ZN 6202N 6202-2ZN 6201-2ZN 6200ZZ 6200-2ZN 62/32-ZN 62/32-Z 62/32N 62/32-2Z 62/32-2RZ 62/32-2RS 62/28-2RZ 62/22-2RZ 61996 61992 61988 61984
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Shaft and hole shape accuracy is bad, bearing the ferrule flexure deformation happens after installation, this caused by the low frequency vibration than the vibration of the intrinsic waviness of rolling bearing surface.2.1. Install the effect of surface geometric error
Bearing ring raceway roundness, generally around 2 microns, such as the installation of the shape of the surface error is greater than 2 microns - usually with 2 ~ 10 the waviness of the wave, when the bearing ring for interference fit is installed on the surface, the race may suit up 2 ~ 10 waviness, the operation will appear when the vibration of high specific speed 2 ~ 10 times.
If the installation of journal bearing with spline or near tight fit flat key, could also lead to bearing raceway waviness. Installed along the axial surface is not flat or its shoulder the chamfering radius is too large, also can make ring similar similar deformations caused by vibration and noise. Therefore, as in the inspection of the above, at the installation surface must be repair or change to the quality meets the requirements of the matching parts.
2.2 ring and positioning block shoulder is not vertical
When the bearing ring and vertical not positioning block shoulder, as in the circumferential direction for the movable fit, the distorted ring, race into oval, its roundness error is approximately twice the clearance between the ring and installation surface.
2.3 the impact of excessive clamping force
Practice has proved that outer easy deformation and easy affected by excessive clamping force. Outer ring with a hole for the clearance fit normally, with two end cover clamp with axial positioning and prevent micromotion abrasion. When the end cover through the thin, form a great error, clamping force is too large, or the bolt clamping force is not uniform, will make the outer ring produces a large deformation. Due to the clamping ring twist deformation is large, as a result of vibration and noise is also very significant, must ensure that the necessary precision of end cover, and moderately tightened bolt, to reduce the deformation of the outer ring due to the clamping.
2.4 cooperate with too loose on the surface of the bearing and installation
Cooperate with too loose on the surface of the bearing and installation, if occur on the surface of rotating ring and installation (usually axis), between the possible relative to the ring radial motion on the surface of the installation, so as to change the state of equilibrium, the elastic vibration of centrifugal force excitation, even to axial clamping, but the ring to thermal expansion of "creep" approach to the radial imbalance.
If the fixed ring and (usually) is a hole on the surface of the installation with too loose, the weight of the shaft system are more likely to deform the ring, appear all sorts of roundness, if be axial clamping, the deformation is deepening and fixed down, when bearing the deformation is stimulated elastic vibration during operation. In addition, if the outer ring with a hole between the surface too loose, the bearing is easy to get bigger windage, - this will lead to increased alternating elastic vibration. Therefore, in order to avoid this kind of vibration, do not make the bearings with too loose.
2.5 the effect of alignment error
Alignment error and geometrical deviations on the surface of the rolling bearing, shaft and hole of the alignment and shoulder the verticality of the block, but usually is given priority to with the latter, the error of the bearing itself is relatively much smaller. For ball bearing, the alignment error has significant effects on its basic rotation error, and the resulting vibration associated with rotation speed.
