What are the reasons for insufficient air volume of Roots vacuum pump analyzed by Roots blower manufacturer?

What are the reasons for insufficient air volume of Roots vacuum pump analyzed by Roots blower manufacturer? Briefly talk about the factors of insufficient air volume of Roots vacuum pump. How to achieve the failure and maintenance of Roots vacuum pump? The following gives you a detailed introduction! 　　

Certain failures are inevitable in use. We need to find out the cause of the failure and find out the method of failure, so as to better ensure the operation of the equipment and extend its service life.

The air volume of Roots vacuum pump is not enough. This kind of failure makes the pump unable to give full play to its efficiency and meet the process requirements.

The reason for this failure may be: the pump speed is not enough; The seal is not tight, and the air leakage occurs at the inlet pipe or shaft seal connection; The clearance between the pump rotor and rotor, between the rotor outer ring and the pump casing, between the rotor end face and the end cover circumference is too large, the return air flow becomes larger, and the ambient temperature or cooling water temperature is too high. The treatment methods are as follows:

1、 If the rotating speed of Roots vacuum pump is not enough, and the pumping capacity is proportional to the rotating speed of the pump, the pumping capacity of the pump will decline. There are two situations: one is that the rotating speed of the pump is not appropriate, that is, the pulley diameter is not appropriate (that is, the speed ratio is not appropriate), the pulley can be replaced and the pulley diameter can be changed; The other is that the belt is improperly installed, not tensioned, and the belt slips, thus reducing the speed. The position of the motor can be adjusted to make the belt pull to a certain extent.

2、 Find out the air leakage place and handle it according to the specific situation. If the connecting flange leaks, it may be because the connecting screw is loose, the gasket is damaged and deteriorated, or the flange surface is not processed evenly. If the shaft seal leaks, it may be because the seal cup is installed incorrectly or cracked. At this time, replace the cup and install it correctly. If the packing is sealed, the blocked packing can be pulled out, Replace it with a new one. However, the joints of the filler should be inclined and overlapped with each other. The interface of the first circle should be staggered with the interface of the two circles, not at the same position.

3、 It is known from practice that the air extraction volume will decrease when the ambient temperature rises. In this case, try to lower the injection water temperature.