Date: 2013-08-20

How to carry out the bearing and the shaft with the detection

Clearance of the bearing and the shaft must be appropriate, detection of the radial clearance may adopt the following methods.
1, the gauge method
For bearings, large diameter larger gap, should be used to directly detect the gauge narrow. For bearings, smaller diameter smaller gap with a feeler gauge measurement, inconvenience, but the backlash bearing, must use the appropriate thickness feeler gauge measurement.
2, lead detection method
For the detection of bearing clearance with a feeler gauge pressure lead method is accurate detection, but more trouble. The detection of wire diameter should be soft, not too big or too small, the most ideal diameter is 1.5~2 times the gap, the actual work is often used to detect soft wire.
When detecting, the bearing cover is opened, the choice of the appropriate diameter of wire, cut into small pieces of 15~40 mm long, in the Journal on the upper and lower bearings at the interface, the cover bearing cover, according to the prescribed torque tighten mounting bolts, then loosen the bolts. Remove the bearing cover, with the lead wire thickness micrometer detection flattened, calculate the average gap bearing top.
If the tip clearance is too small, in the lower tile, with surface plus pad. If too large, less pad, scraping or re-poured watts.
Bearing tension adjustment: in order to prevent the bearing may occur in the process of rotation and axial movement, in addition to fit interference and the stop parts, bearing must also use the bearing cap tightly, measuring method and the measuring tip gap method, the measured soft lead wire thickness can be calculated, bearing force (represented by bearing the compressed elastic deformation)
General bearing the pressing force in the 0.02~0.04 mm. If the pressure does not meet the standard, the shim thickness can be used to increase or decrease the bearing and the bearing joints at the method to adjust, tile back with no pad.
Sliding bearing in addition to ensure that the radial clearance, should also ensure that the axial clearance. Detection of axial clearance, the axis is moved to an extreme position, and then with a feeler or dial indicator measuring axis from one extreme position to the other extreme position runout of axial clearance.
When the sliding bearing clearance is not in conformity with the provisions, shall be adjusted. Split bearings are often used to adjust the radial gap gasket (tip).

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