Method and instrument for measuring preload of rolling bearing

Details Method and instrument for measuring preload of rolling bearing Method and instrument for measuring preload of rolling bearing

1992-06-25

1993-11-23

Williams, Hezron E.

Measuring and testing

Vibration

By mechanical waves

7386249, 7386259, G01M 1304

Patent

active

052633721

ABSTRACT:
While maintaining a shaft in a fixed state, an outer ring is rotated. Vibrations of the shaft are detected by a first vibration pickup and a second vibration pickup. Detection signals of both the vibration pickups are delivered to a frequency converter via amplifier, respectively. The frequency converter determines, by Fourier transformation, the rotation frequency of the outer ring, the revolution frequency of balls and the resonance frequency of the double-row ball bearing. The first computing device then calculates the contact angle and bearing rigidity, and the second computing device calculates the preload.

REFERENCES:
patent: 3023604 (1962-03-01), Gordon et al.
patent: 3287966 (1966-11-01), Haan et al.
patent: 4352293 (1982-10-01), Kurihara et al.

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