Bearing Maintenance

   Bearing damage for many reasons: beyond the originally expected load, the non-effective sealing, tight fit caused by too small bearing clearance and so on.Broadly speaking, one-third of deck crane bearing damage due to fatigue damage, third is due to poor lubrication, the third is due to contaminants from entering the bearing or improper installation process. Fatigue is the result of the shear stress occur periodically formed on the surface of the load. After a period of time, the shear stress will lead to microcracks, and gradually extends to the surface. When the rolling elements through these cracks, the crack block off there, forming a so-called peeling phenomenon. Increases with the increase in the stress and crack the block, resulting in the spread of the peeling area. The damage in the form of process usually lasts a very long time, and its stage is visible increase in noise and vibration time. Therefore, before the complete destruction of the ferris wheel bearing, which provides the user sufficient time to find and replace it. For the Port of large lifting equipment, such as shore container cranes, gantry cranes, the main lifting mechanism, trolley mechanism bearing replacement cycle is generally 25000h, gantry crane traveling mechanism, bearing replacement cycle is generally luffing mechanism 6300 ~ 10000h. The specific time depending on the bearing replacement actual usage and maintenance of the state.
    Axis skew can cause various parts of a machine malfunction, especially for large port lifting equipment, the basic principles of its institutions are from the motor to the gear box input torque increases and then output to the respective transmission parts. Therefore, the strips run institutions in various parts of the center line adjustment is particularly important, the right to the heart of the work is preventive maintenance work is a very important part. Basic does not mind, there are two types, one for the parallel-type, a different perspective of the formula. However, the actual situation is usually a combination of these two types. Skewed axis will produce a moment. This moment will be the bearing in the drive unit and the driven unit, reaction force is generated. Because does not mind the increased load of about 20% to 50% will reduce bearing life.
    Another consequence of that is the seal wear, with the resulting contaminants into the bearing or oil spills, the crisis has brought damage wind power bearing

.Therefore,the correct working of the heart can be improved bearing and seal life. For high energy consumption harbor large lifting equipment, can reduce vibration, noise and energy consumption. Centerline adjustment often make use of dial indicators and other tools. Exhaust ports for loading large lifting equipment motors, gear boxes and other transmission parts, the general will face runout control within 0.1mm, radial runout controlled within 0.05mm.