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Precision instrumentation for rolling element bearing characterization.

Eric R Marsh1, Vincent C Vigliano, Jeffrey R Weiss

  • 1Machine Dynamics Research Laboratory, The Pennsylvania State University, 331 Reber Building, University Park, PA 16802, USA.

The Review of Scientific Instruments
|April 7, 2007
PubMed
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This summary is machine-generated.

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This study presents a novel instrument for measuring rolling element bearing error motion. The device achieves high accuracy by precisely controlling preload, rotation, and non-influencing measurements for reliable data.

Area of Science:

  • Mechanical Engineering
  • Tribology
  • Metrology

Background:

  • Accurate measurement of bearing error motion is critical for predicting performance and lifespan.
  • Existing methods often struggle to meet stringent requirements for preload, controlled rotation, and non-distorting fixturing.
  • Understanding bearing error motion is essential for applications demanding high precision.

Purpose of the Study:

  • To describe the design and validation of a new instrument for measuring the error motion of rolling element bearings.
  • To detail the methodology for simultaneously meeting critical measurement requirements.
  • To demonstrate the instrument's capability for high-resolution data acquisition.

Main Methods:

  • Utilized an air bearing reference spindle for precise inner race rotation (<10 nm error motion).

Related Experiment Videos

  • Employed non-influencing couplings to apply axial preload and prevent outer race rotation without distortion.
  • Integrated capacitive displacement sensors (2 nm resolution) to measure outer race displacements (radial, axial/face, tilt).

    • Main Results:

    • Achieved error motion measurement repeatability of less than 25 nm.
    • Demonstrated the ability to measure bearing error motion under controlled conditions.
    • Validated the instrument's suitability for high-resolution data acquisition.

    Conclusions:

    • The developed instrument effectively measures rolling element bearing error motion with high accuracy and repeatability.
    • The design successfully addresses the challenges of preload application, controlled rotation, and non-influencing measurement.
    • The instrument can provide data for accurate estimation of parameters like the contact angle in deep groove ball bearings.