Roots pump for vacuum systems
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The primary pump is a water ring pump, while the secondary and tertiary pumps are Roots vacuum pumps. Previously, both sets of pumps were operating normally; but now the secondary and tertiary pump housings are getting extremely hot, with temperatures reaching around 80 degrees. Sometimes, the rotors even overheat and cause the pumps to stop working! I don’t know what’s causing such a high fever. I hope the experts here can give some advice. Thank you all
It is possible that the medium temperature is high, there are issues with the cooling systems of the second and third stage pumps, or the rotor clearance has decreased.
There should be a cooler at the front end of the gas being drawn in; check to see if the refrigerant is reaching there
Well, yes, but I’m still wondering if it’s because the suction capacity of the primary water ring pump is insufficient, which results in a somewhat high pressure difference between the secondary and tertiary pumps and thus heating! Is there any good solution?
There is a condenser, and the condensation effect is fairly good
It can be determined that a decrease in the pumping speed of the primary pump is responsible for an increase in the pressure difference across the secondary and tertiary Roots vacuum pumps; as a result, both the temperature and current levels rise. It is best to service the water ring vacuum pump that serves as the pre-pump, otherwise it could cause damage to the Roots vacuum pump, with the rotor potentially breaking.
The medium is equipped with buffer tanks and condensers; each stage of the vacuum pump has a jacket cooled by water. Whatever method is used, cooling is necessary
It’s likely that the vacuum level of the water ring pump is insufficient, or there is a leak somewhere before the pipeline flange of the secondary pump
It’s likely the previous water ring pump – insufficient vacuum levels are to blame, which leads to an increase in the compression ratios of the second and third stages, thereby increasing the load and causing overload~
No wonder it’s due to these reasons: 1. Insufficient pumping capacity of the primary pump; 2. Insufficient cooling capacity of the condenser; 3. Vacuum leakage in the system
It is also very likely that the high temperature leads to insufficient vacuum level in the water ring vacuum pump; system condensation and leakage points can both be potential causes. If it’s not too far, I can go over and show it to you. I am from Zibo, Shandong.