Accession Number : ADP010177

Title :   Technology Overview: Shock Pulse Method

Corporate Author : JOINT OIL ANALYSIS PROGRAM PENSACOLA FLTECHNICAL SUPPORT CENTER

Personal Author(s) : Morando, Louis E.

PDF Url : ADP010177

Report Date : APR 1996

Pagination or Media Count : 11

Abstract : The name, SPM, is derived from the technology that SPM Instrument developed and patented in the early 70's in Sweden. The Shock Pulse Method is the monitoring and analyzation of high frequency compression (shock) waves generated by a bearing while rotating. From this research, empirical data was developed and patented to measure the theoretical film thickness of the lubricant in the rotating bearing along with an analysis of the overall condition of the bearing surfaces. The way these signals are separated is really what makes this technology unique. Unlike vibration analysis that monitors a broad vibration band and then tries to isolate unique frequencies; SPM has developed a means to only look at the high frequency signals of antifriction bearings. Having ensured that the signal quality truly reflects a bearing signal, the development of a defined data base by SPM became practical. The ability to analyze lubrication changes versus surface damage becomes more practical and repeatable. Through years of testing, this data base has been developed and perfected so as to represent the True operating condition of the bearing being monitored. Regardless of whether the bearing is 5 days old or 5 years old the reading taken represents the operating condition at that time.

Descriptors :   *SYMPOSIA, *LUBRICANTS, *SHORT PULSES, *ANTIFRICTION BEARINGS, COMPUTER PROGRAMS, SHOCK WAVES, RESONANT FREQUENCY, INSTRUMENTATION, SWEDEN.

Subject Categories : Lubricants and Hydraulic Fluids
      Machinery and Tools
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE