Vacuum pump is a device which can improve, produce 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 often find that the bearing is overheated and the temperature is too high in the process of using, so what's the cause? Here's a brief explanation for you.
During the operation of the vacuum pump, the 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: the valve plate cracking causes the pressure imbalance on both sides of the impeller, axial force will occur on the rotor, which will aggravate the bearing load, and long-term operation will increase the bearing temperature.
2. Shaft end seal failure: when the shaft end seal packing is damaged or the seal water channel 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 axial force will occur on the rotor, which will aggravate the bearing load and increase the bearing temperature.
3. Bearing preload is too large: this situation will promote the reduction of bearing clearance or no clearance, forming bearing temperature rise.
4. Sensationalism: too much sensationalism of pump body or bearing will cause too high bearing temperature.
5. Smooth appearance: if the increase of smooth grease is too large or too small, or the type of smooth grease is inconsistent, the use time is too long, or the smooth grease is polluted, bearing heating will be formed. At this moment, you should check the type of smooth grease, ask the manufacturer for the appropriate amount, and adjust the smooth grease to recover the bearing temperature.
6. Bearing damage: after the bearing tumbler and bearing cage are damaged, the appearance of bearing overheating will appear. If the bearing is damaged, it is necessary to replace the new bearing in time.
The above is the cause analysis of bearing heating of vacuum pump and relevant countermeasures. As the saying goes, "be prepared for no harm". Only when you have relevant knowledge and meet the corresponding situation, can you deal with it in a timely and effective manner. I hope the above information will be helpful to your understanding and learning.
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