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Research Papers: Applications

Effects of Grease Characteristics on Sound and Vibration of a Linear-Guideway Type Recirculating Ball Bearing

[+] Author and Article Information
Hiroyuki Ohta

Department of Mechanical Engineering,
Nagaoka University of Technology,
Graduate School of Engineering,
1603-1 Kamitomioka,
Nagaoka, Niigata 940-2188, Japan
e-mail: ohta@mech.nagaokaut.ac.jp

Tatsuya Tsuruoka

Department of Mechanical Engineering,
Graduate School of Engineering,
Nagaoka University of Technology,
1603-1 Kamitomioka,
Nagaoka, Niigata 940-2188, Japan

Yukitoshi Fujinami

Lubricants Research Laboratory,
Idemitsu Kosan Co., Ltd.,
24-4 Anesakikaigan,
Ichihara, Chiba 299-0107, Japan

Soichiro Kato

LG Technology Department,
Linear Technology Center,
NSK Ltd.,
12 Kirihara,
Fujisawa, Kanagawa 252-0811, Japan

Contributed by the Tribology Division of ASME for publication in the JOURNAL OF TRIBOLOGY. Manuscript received May 31, 2015; final manuscript received August 20, 2015; published online October 15, 2015. Assoc. Editor: Ning Ren.

J. Tribol 138(2), 021101 (Oct 15, 2015) (8 pages) Paper No: TRIB-15-1176; doi: 10.1115/1.4031437 History: Received May 31, 2015; Revised August 20, 2015

This paper deals with the effects of grease characteristics on sound and vibration of a linear-guideway type ball bearing. First, sound, vibration, and temperature of a linear-guideway type ball bearing were measured by changing 16 types of greases. Next, in order to explain the effects of grease characteristics (absolute viscosity η0 of the base oil in the grease at atmospheric pressure, pressure–viscosity coefficient ξ of the base oil, and penetration P of grease) and linear velocity V on the sound pressure p and vibratory acceleration a of the linear bearing, dimensional analyses were carried out. The dimensional analyses derived dimensionless products Pp/(η0V) and η0ξV/P for the sound, and dimensionless products Pa/V2 and η0ξV/P for the vibration. The plot of the measured data using dimensionless products showed that both sound pressure p and vibratory acceleration a (under a certain linear velocity) decreased as the absolute viscosity η0 of the base oil in the grease at atmospheric pressure or the pressure–viscosity coefficient ξ increased. Whereas the sound pressure p decreased as the penetration P decreased, the vibratory acceleration a decreased as P increased.

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References

Figures

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Fig. 3

Measurement apparatus

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Fig. 4

Measured Lp and La versus η0

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Fig. 5

Sound and vibration time waveforms (V = 1.0 m/s)

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Fig. 6

Sound and vibration spectra (V = 1.0 m/s)

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Fig. 7

Plot of dimensionless products (Pp/η0 V) and (η0ξV/P)

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Fig. 8

Plot of dimensionless products (Pa/V2) and (η0ξV/P)

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