Roths blower clearance adjustment
Thread Content
At our factory, after replacing the rotors and bearing housings in the double-lobe Roots blowers manufactured by Changsha Blower Factory, we encountered problems with adjusting the clearance of the rotors. According to the accompanying documentation, each rotor has two meshing clearances of +45 and -45; we’re not sure how to make the necessary adjustments. For assistance, please contact us on QQ: 391154177
The clearances in a Roots blower are divided into ① the clearance at the fixed side and the clearance at the moving side; through axial positioning, this is generally achieved by adjusting the bearings (shims)； ②The impeller clearance cannot be adjusted due to machining and running-in processes ； ③The gap between the leaf surfaces, which can be divided into those on the driving side and those on the non-driving side (or between the larger and smaller surfaces); this is generally checked by pressing a feeler gauge between the two leaf surfaces, adjusting the gear, and then verifying whether the gap is within acceptable limits.