When the Roots blower is idling, the impeller has little or no contact with the medium, so it is unable to work effectively, and the liquid cannot be delivered normally, which is useless work. Because there is no effective work, the load on the motor is very small, and the generated current is also very small, which will have no impact on the motor. The idling of the machine is really fatal to the pump. The idle water pump is easy to cavitate, causing damage to the pump body and flow passage parts; Idling pump mechanical seal or packing seal will not be lubricated by liquid, resulting in dry grinding and rapid damage; The idling pump rotor parts and pumps will generate heat without liquid cooling, and the narrow gap positions (such as sealing rings) are easy to bite due to thermal expansion and contraction; The idle Roots vacuum pump balance plate has no lubrication, and the balance plate will be burned and damaged soon.
Roots blower is a high-speed machine, so it will produce vibration, and because the pulsation of its internal air also increases the vibration of Roots blower, so the installation of Roots blower needs to be fixed on the ground. According to different models of fans, 150 * 150 mm square and 300 mm deep square pits shall be dug on the ground according to the size of the fan, and the anchor bolts shall be embedded. Then the fans shall be connected through bolts and nuts. Finally, the square pits shall be filled with cement concrete. After the concrete is fixed, the nuts shall be tightened with force, so that the fan base and concrete are firmly connected, This can reduce the vibration displacement of Roots blower during operation, improve the operation safety of the equipment, and greatly extend the service life of the blower due to reduced vibration.
The clearance positions shall be treated and expanded under allowable conditions to prevent seizure; Special process treatment, quenching and tempering, heat treatment, etc. shall be carried out for its shaft to improve its hardness. Materials with low flexibility shall be used to prevent large swing and seizure during idling; Use mechanical seal and packing chamber that do not need to be lubricated by liquid medium; Closed self-lubricating bearings without oil filling shall be selected.
Compared with other pumps, the pump chamber of Roots blower has a larger volume space and a place where water can be stored. Before normal operation, the cavity should be filled with liquid. Before operation, there is a period of self-priming time, during which air is continuously discharged to the pump body. This period of time belongs to partial idling.
In fact, a large part of the idling problem of Roots blower is related to our own handling, such as improper installation, improper operation method, and untimely maintenance. Generally, we have no head when dealing with these problems. The above is the analysis of its idling problem. In fact, a large part of the reasons are related to our own handling, such as improper installation, improper operation, and untimely maintenance.
I believe that after reading the above content, you should also understand the handling method of Roots blower idling. I hope it will help you.
Text label: Roots blower
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