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Vacuum pump is a device to improve, generate and maintain vacuum in a closed space by various methods. It has been widely used in metallurgy, chemical industry, food, electronic coating and other industries, and has attracted the attention and favor of market users. However, users in the process of use, often find its bearing heating, temperature is too high, so what is the cause, the following small series for you to interpret the reason.

During the operation of vacuum pump, bearing heating is mainly based on its high-speed operation. The specific reasons include valve plate cracking, shaft end seal failure, excessive bearing preload, sensational influence, smooth appearance and bearing damage. The following is a detailed analysis:

1. Valve plate cracking: valve plate cracking causes pressure imbalance on both sides of the impeller, axial force of rotor will occur, which will aggravate bearing load, and long-term operation will make bearing temperature rise.

2. Shaft end seal failure: when the shaft end seal packing is damaged or the sealing water passage is blocked, the suction and exhaust performance of the pump will be affected. If only one side of the seal fails, the pressure on both sides of the impeller will be unbalanced, and the axial force of the rotor will occur, which will aggravate the bearing load and increase the bearing temperature.

3. Bearing preload is too large: this situation will promote bearing clearance reduction or no clearance, forming bearing temperature rise.

4. Sensational effect: pump body or bearing sensational extent is too large will also cause bearing temperature too high.

5. Smooth appearance: the increase of smooth grease is too large or too small, or the type of smooth grease does not meet the requirements, and its use time is too long. Maybe the grease is polluted and will form bearing heating. At this point, you should check the type of grease, ask the manufacturer for the appropriate dosage, and adjust the grease to recover the bearing temperature.

6. Bearing damage: Bearing rollover body and bearing cage damage will be accompanied by the appearance of bearing overheating. Bearing damage, it is necessary to replace the new bearing in time.

The above is the cause analysis of vacuum pump bearing heating and related countermeasures, as the saying goes: "be prepared without danger". Only with relevant knowledge, can we deal with the corresponding situation in a timely and effective manner. I hope the above information can help you understand and learn.