Two-blade Roots blower
Thread Content
The inlet and outlet diameter is DN600, the impeller diameter is 780 mm. There are two spur gear drives with a diameter of 500 mm inside the main oil tank. Axial vibration speeds were found to be significantly high in the middle part of the tank, reaching 67 mm/s, while the horizontal vibration speed was 11 mm/s. The vibration values decreased as one moved away from the middle part of the tank. There was also significant noise coming from the tank. What could be the cause of such high axial vibration speeds? Thank you!
There are a few points that need to be checked and confirmed; try changing the load to see if there are any process control issues caused by the load changes； Is the anchoring of the foundation bolts reliable? ； If it’s not a process issue, it needs to be disassembled for inspection.
I would like to ask what factors can affect excessive bearing vibration in such situations
What I mean is to use the process of elimination to determine whether the issue lies with the equipment itself or with mechanical aspects. In the case of process-related problems, things such as suction pressure and discharge pressure not matching the design parameters can lead to phenomena like equipment vibration. If it is mechanical in nature, it is caused by issues such as damaged bearings or problems with equipment installation. First, distinguish between the two phenomena, and then conduct a targeted detailed analysis to identify the root of the problem. I am not in favor of listing a bunch of possibilities; I prefer to simplify the issues, starting with the macro level and then moving on to the micro level. I also don’t like question-and-answer formats based on test questions. Because these are mostly not generic test questions. For reference.
What pressure should be used under normal conditions? What is the pressure difference at the inlet and outlet? There is also the issue of the layout and support of the inlet and outlet pipelines – does the vibration increase suddenly, or is it high from the very beginning? . . . . There are many factors that can cause vibration, and these need to be analyzed and identified gradually based on the testing conditions
After checking from a process perspective, if the problem is not caused by the process or operational practices, contact the manufacturer to readjust the gap between the impeller and the casing.
Could the coupling be checked? A lot of axial vibration is caused by the motor.