After the shaft sleeve and the hole are first cooperated, the shaft is mounted on the hole with the sleeve.
Axis installation request
Bearings are used to support the components, but also to support the
shaft reversal parts, bearing the type of conflict by the nature of the
points: There are sliding bearings and roll bearings, installation
requests are:
1、Installation of tumbling bearing
Rolling bearings have the advantages of small collision, small axial
size, convenient replacement of bimetal bearings, and simple
maintenance.
(1) Installed technical request
1 Rolling bearing The end face marked with the code should be installed in the visible direction for checking when replacing.
2 The radius of the arc of the rolled bushing at the shoulder of the
journal or housing bore shall be less than the radius of the arc
corresponding to the bearing.
3 After the bearing is installed in the shaft and in the housing hole, there should be no oblique view.
4 In the two coaxial bearings, it is necessary to have a shaft movement when the shaft expands.
5 When installing tumbling bearings, it is necessary to strictly prevent dirt from entering the bearing.
6 After installation, the bearing must be sensitive to operation, low
noise, and the operating temperature should not exceed 65°C.
(2) Installation method
When
installing the bearing, the most basic request is to increase the axial
force, and the direct effect is on the end face of the bearing ring
installed (when installed on the shaft, the added axial force must be
directly applied to the inner ring; The effect of adding force on the hole has a direct effect on the outer ring). Try not to affect the roll body. Installation methods include hammering, press mounting, hot mounting, and freezing installation.
1 Hammering method
After
hammering the copper rod and some contrasting soft materials and then
hammering it, be careful not to cause foreign objects such as copper
powder to fall into the bearing raceways. Do not hit the inner and outer
rings of the bearing directly with a hammer or punching cylinder to
avoid affecting the bearing. The accuracy of the cooperation or formation of bearing damage.
2 screw press or hydraulic press installation method
With regard to bearings with larger interference maneuvers, they can be installed with screw presses or hydraulic presses. Before pressing, the shaft and bearing should be laid flat and a small
amount of lubricating oil should be applied. The pressing speed should
not be too fast. After the bearing is in place, the pressure should be
quickly removed to avoid damaging the bearing or the shaft.
3 hot loading method
The
hot loading method is to heat the bearing in oil to 80°C-100°C so that
the inner hole of the bearing is swollen and set on the shaft to prevent
the shaft and the bearing from being damaged. For bearings with dust caps and seals, bearings that are filled with grease are not hot-fitted.
(3) The clearance of the tapered roller bearing is adjusted after
installation. The first method is to adjust the gasket, adjust the
screw, and adjust the nut.
(4)
When installing a thrust ball bearing, the tight ring and the loose
ring should be distinguished first. The inner diameter of the tight ring
should be slightly smaller. After the installation, the tight ring and
the shaft should be relatively stopped during operation. It always
depends on the shaft. At the end of the step or hole, the bearing will lose rollover and accelerate wear.
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