Roots Blower Help Line: Standard Vibration Test for Blower Packages

R&M preforms a vibration test for standard blower packages

This is a video of a full load vibration test of an R&M Equipment Company standard fully assembled blower package. We are using a Howden Roots 616 RAM blower and a 125HP drive motor operating at a system pressure of 10 PSIG. This test allows us to verify that all of the equipment is aligned properly, leveled and that the supporting structure is sufficiently designed to operate this equipment in a continuous application.

High vibration levels can lead to blower damage. It is important to have a well built package and properly install the package to maintain low vibration levels. It is also recommended to monitor vibration levels on a regular basis. Should you have a sudden or drastic increase in vibration, please contact us with questions as this indicates a problem.

This is one test we preform here at R&M, we can also preform mechanical run testing, noise level testing. We can also preform testing on site.

For a full speed & load vibration test, the procedure is as follows:

  • The design load will be created by a butterfly valve regulated to create the appropriate pressure drop.
  • The vibration levels for the blowers and motors will be measured on three planes horizontal, vertical, and axial under full load. The base will be measured in the vertical plane.
  • The blower recorded levels must meet the Roots vibration criteria for rotary lobe blowers. Vibration levels less than 0.45 is considered very good. Levels of 0.45 thru 0.62 are considered good. Levels of 0.62 thru 1.0 are considered satisfactory. Levels greater than 1.0 need review by the factory. If any measurements exceed the limits, adjustments will be made as necessary and the equipment will be re-tested until the specifications are met.
  • The NEMA criterion for vibration of un-loaded motors is 0.15in/sec. There are no criteria in NEMA for the vibration levels of loaded motors.
  • The base levels must meet the R&M standard level of 0.60″/sec.
  • Data recorded on the test form: T001

 

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