he vibrating screen is a vibrating screen that relies on a large excitation force to maintain its work. During the working process, a large excitation force will cause the elastic vibration of the bearing system. If the lubrication is not good, there will be greater friction that will cause the bearing temperature to rise too high, the thermal expansion is too large, and the radial clearance is significantly reduced, which intensifies the friction and further increases the temperature rise.
There are generally two ways to lock bearings:
1. Bearings attached to the screws
Only need to tighten the screw on the extension part of the inner ring to fix the outlet bearing seat, and then fix it with a hexagon wrench. Please choose a hexagonal wrench with a suitable size.
2. Bearing with fair lock sleeve
The fair lock sleeve has a recess for the vibration and temperature of the self-aligning ball bearing. This recess is fair with the inner hole, and there is also a part in the inner ring of the bearing seat that is fair. Position the fairing sleeve on the inner ring first, and turn the fairing bearing sleeve quickly toward the direction of shaft rotation until it is tightened. Use a hexagonal wrench to tighten the screw.
The vibration system composed of the bearing and the eccentric system can be regarded as a single degree of freedom system. Both the driving shaft and the driven shaft system have a certain value of resonance frequency. If a certain excitation frequency is close to the resonance frequency, resonance will occur. In addition, due to the centrifugal force of inertia due to eccentricity, bending vibration will produce material factors that affect the life of the bearing. If the speed is close to the critical value, bending resonance will occur.
From the point of view that peeling, indentation, corrosion, cracks, wear, etc. will be reflected in the vibration measurement of the bearing, bearing vibration is very sensitive to the damage of the bearing. Therefore, the self-aligning ball bearing adopts a special bearing vibration measuring instrument (frequency Analyzers, etc.) can measure the magnitude of the vibration, and the specific conditions of the abnormality cannot be inferred through the frequency division. Since the measured values ??are different due to bearing usage conditions or sensor installation positions, etc., it is necessary to analyze and compare the measured values ??of each machine in advance to determine the judgment standard.
Because the bearing will emit abnormal and irregular sounds even if there is slight peeling and other damage, it can be distinguished by a sound meter. The sound meter is used to check the size and sound quality of the rolling sound of the bearing in operation. To the effect of early prevention.
It is more appropriate if the oil hole can be used to directly measure the temperature of the outer ring of the bearing. In general, the temperature of the bearing can be inferred based on the temperature outside the bearing housing. If the lubrication and installation parts are appropriate, the temperature of the self-aligning ball bearing will rise sharply and abnormally high temperature will occur. At this time, the operation must be stopped and necessary precautions must be taken. usually,
The temperature of the bearing slowly rises with the operation, and reaches a stable state after 1-2 hours. The normal temperature of the bearing varies with the heat capacity, heat dissipation, speed and load of the machine. When necessary, a thermal sensor can be used to monitor the working temperature of the bearing at any time, and automatically alarm the household when the temperature exceeds the specified value or stop the combustion shaft accident.
