How to carry on the INA bearing and shaft detection
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Clearance of INA bearings and shaft must be appropriate, detection of radial clearance can be used the following method.
1, match length detecting method
In larger diameter INA bearing, gap between the larger, with direct detection of feeler gauge narrow. For the smaller diameter shaft, a smaller gap, and inconvenient to use a feeler, but the side gap of INA bearings, must use the appropriate thickness feeler.
2, pressure lead detection
INA for the detection of bearing clearance lead compared with feeler gauge accurate detection, but more trouble. Aluminium wire for detection should be soft, diameter should not be too large 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 INA bearing cover is opened, the choice of the appropriate diameter wire, cut into small pieces of 15~40 mm long, in the Journal on the upper and lower INA bearings at the interface, on the cover of INA bearing cover, according to the prescribed torque tighten mounting bolts, then bolt in the screw, remove the INA bearing cover, with the lead wire thickness micrometer detection flattened, calculated the average value of INA bearing top clearance.
If the tip clearance is too small, in the lower tile, with surface plus pad. If it is too large, less pad, scraping or re poured watts.
Bearing preload adjustment: in order to prevent possible bearing on the working process of the rotation and axial movement, in addition to fit interference and the stopper part, Bush also must use INA bearing cover tightly, measuring method and the measuring tip gap method, the measured soft lead wire thickness can be calculated, bearing stress (deformation bush compressed elastic to express)
General bearing the pressing force in the 0.02~0.04 mm. If the pressure does not meet the standard, can be used to increase or decrease the INA bearing and bearing joints at the gasket thickness 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 use a feeler gauge or a dial indicator measuring axis from one extreme position to another extreme position runout of axial clearance.
When the sliding INA bearing clearance is not required, should be adjusted. To open INA bearings are often used to adjust the radial gap gasket (tip).