1, selection of smooth fat or oil failure or mistakes.
Countermeasures: to select the correct smooth fat or oil, smooth check the compatibility of fat or oil.
2, the oil level is too low, smooth agent from the loss of oil seal, bearing in the smooth and lack of grease.
Countermeasures: oil level should be slightly lower than the bottom one at the center of the roller, bearing the smooth fat fill about 1/3 to 1/2 in the cabinet space.
3, oil level is too high, or bearing box smooth full full fat, it will cause smooth agent and stirring, resulting in high temperature or leak.
Countermeasures: smooth fat add into the box to 1/2;
If the oil is smooth, oil level slightly below the bottom of the center of the roller.
4, bearing clearance is not appropriate, when there is a heat flow through the axis from the inner fire contraction.
Countermeasures: can check overheating bearing clearance is the original design range, if be, please switch to a larger gap, to C3 and C3 to C4.
5, contact type (
Friction)
Oil seal too dry or spring too tight.
Countermeasures: changed the oil seal of the contact type, and smooth the oil seal appearance.
Six, bearing in the hole is not round, bearing box distortions, the bearing surface is not smooth, cases of hole diameter is too small.
Action: check the bearing box, inner hole, average distribution adjustment base.
7, rotating seal and gland are friction, friction or shoulder to the bearing sealing cover.
Countermeasures;
Inspection of the rotating seal operation clearance to prevent friction, avoid the wrong is.
8, interspersed with orientation or a shaft have two locating bearing, due to excessive axial shrinkage cause lack of bearing inner clearance.
Countermeasures: between the bearing housing and the end cover flange insert TAB to release bearing axial preloading.
Apply any bearing box end cover to offshoring, adjust the sheet to get between the bearing box and the space between the outer ring, possible axial spring strength on the outer ring, in order to reduce the axial shaft floating.
9, set set fire lock.
Countermeasures: relax fixed nut with the sleeve, lock again, to ensure bearing can free rotation.
10, with two or more of the bearing axis coupling, produce incorrect linear bias or tilt Angle.
Countermeasures;
By adjustment to adjust the right registration, to ensure that the axis of the coupling on a straight line, especially when the shaft has three or more bearing running at the same time, more attention to.
11, the shaft diameter is too big, too much cause the inner ring contraction, reduce the bearing clearance.
Countermeasures: grinding diameter of axle, get a proper fit between the shaft and bearing inner ring.
To switch to bearing radial clearance is big.
12, due to the material of bearing box hole stress after the aperture is too soft, invite outer ring hole slippage in box.
Countermeasures: improve housing material or processing a steel bushing to squeeze into the box, and then processing bushing hole to the correct size.
