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What is the reason for the heat of the vibration screen?

What is the reason for the heat of the vibration screen?
The vibration screen bearing works under the action of heavy load and large centrifugal force, so the general heating phenomenon is more obvious. If the bearing temperature is too high, it may be caused by the following reasons.

(1) Unreasonable selection of bearing types

If in the process of using the vibration screen, the bearing of the exciter is frequently overheated and the condition is not significantly improved after refueling, then it is likely to be caused by the unreasonable selection of the bearing type. The main reason for this situation is that the bearing radial clearance is too small. The bearing on the vibration screen has a high working frequency and a very large load, and the load is a variable load. If the radial clearance of the bearing is too small, there is no way to bear the high frequency and large load, so it is necessary to choose a large clearance bearing when selecting.

(2) Less bearing oil or oil pollution, etc.

The bearing is short of oil or too much oil. If the oil filling of the bearing is not checked for a long time, the bearing will be short of oil, and heat will occur. In severe cases, the bearing will be damaged. To solve this phenomenon, it is usually necessary to check the preliminary cover regularly and fill in oil in time. When refueling, the oil cannot fill the entire end cover, and one-third of the space should be reserved. At this time, it is necessary to oil the bearing, clean it, replace the oil and seal, and check the oil quality and oil filling condition.

(3) Lack of bearing thermal expansion space

The main performance is that when the production time is long, the bearing temperature is high, and the bearing will be damaged. The main reason is that the bearing end cover is too tight when pressing the bearing outer ring, leaving no room for thermal expansion of the shaft. When the temperature rises, the shaft expands, making the bearing end cover dead, and there is no axial clearance. The gland and the bearing There must be a certain gap between the outer rings to ensure normal heat dissipation and certain axial movement of the bearing. This clearance can be adjusted by a gasket between the end cap and the bearing housing.

(4) The entry of external slime

The external environment is harsh, and the entry of coal slime into the bearing end cover is also one of the reasons for the heating of the bearing. Therefore, it is necessary to check the sealing condition of the bearing frequently to prevent the external coal slime and water from entering the inside of the bearing.