This paper deals with vibration and acoustic emission (AE) measurements evaluating the separation of the balls and raceways with lubricating film in a linear-guideway–type recirculating ball bearing (linear bearing) under grease lubrication. In the experiments, three types of commercial grease, AS2, LG2, and PS2, were used. The vibratory acceleration, AE, temperature, and electric conductivity (contact voltage) in the test bearing were measured, while a carriage of the test bearing was driven at a certain linear velocity. Experimental results showed that the measured vibratory acceleration, AE, and contact voltage of the test bearing were affected by the linear velocity and the base oil viscosity of the grease. Next, the rail side film parameter ΛR and the carriage side film parameter ΛC were examined for the test bearing in operation, and it was shown that the ΛR value was lower than the ΛC value. In addition, a condition for the separation of all the balls and raceways with lubricating film was presented. Finally, it was shown that the measured root-mean-square (RMS) values of vibratory acceleration or AE can be used for evaluating the separation of all the balls and raceways with lubricating film in the test bearing.

References

References
1.
Honjo
,
Y.
,
Watanabe
,
S.
, and
Yoshioka
,
T.
,
2003
, “
Detection of Rolling Contact Fatigue Failure of LM Guides
,”
Mag. Prod. Maint.
,
238
, pp.
70
74
(in Japanese).
2.
Michioka
,
H.
,
Yoshioka
,
T.
,
Honjo
,
Y.
, and
Watanabe
,
S.
,
2004
, “
Diagnostics for Linear Guideway Using Acoustic Emission Method (1st Report, Detection of Rolling Contact Fatigue Failure)
,”
Proceedings of Autumn JSPE Meeting
, pp.
839
840
(in Japanese).
3.
Shimizu
,
S.
,
Tsuchiya
,
K.
,
Saito
,
H.
,
Fujii
,
K.
,
Tosha
,
K.
, and
Shimoda
,
H.
,
2007
, “
Life Distribution and Reliability for Linear Bearings in Case of Roller Guide
,”
J. Jpn. Soc. Precis. Eng.
,
73
(
6
), pp.
693
698
(in Japanese).10.2493/jjspe.73.693
4.
Ohta
,
H.
,
Matsuura
,
K.
,
Kato
,
S.
, and
Igarashi
,
Y.
,
2010
, “
Vibration and Acoustic Emission of Linear Guideway Type Recirculating Ball Bearing With a Millimeter-Sized Artificial Defect in the Carriage
,”
ASME J. Tribol.
,
132
, p.
011101
.10.1115/1.4000271
5.
Ohta
,
H.
,
Hayashi
,
S.
,
Kato
,
S.
, and
Igarashi
,
Y.
,
2011
, “
Effects of Grease Types on Vibration and Acoustic Emission of Defective Linear Guideway Type Recirculating Ball Bearings
,”
ASME J. Tribol.
,
133
, p.
021102
.10.1115/1.4003302
6.
Shirai
,
T.
,
Michioka
,
H.
,
Yoshioka
,
T.
,
Honjo
,
Y.
,
Watanabe
,
S.
, and
Yoshioka
,
T.
,
2004
, “
Evaluation of Lubricating Condition in Linear Guideway Systems Using Acoustic Emission Sensors
,”
Proc. of JAST Tribology Conference
, pp.
143
144
(in Japanese).
7.
Michioka
,
H.
,
Yoshioka
,
T.
,
Honjo
,
Y.
, and
Watanabe
,
S.
,
2004
, “
Diagnostics for Linear Guideway Using Acoustic Emission Method (2nd Report, Evaluation of Lubricating Condition)
,”
Proceedings of Autumn JSPE Meeting
, pp.
841
842
(in Japanese).
8.
Tallian
,
T. E.
, and
McCool
,
J. I.
,
1968
, “
The Observation of Individual Asperity Interactions in Lubricated Point Contact
,”
ASLE Trans.
,
11
, pp.
176
190
.10.1080/05698196808972220
9.
ESDU International Ltd.
,
1985
, “
Film Thickness in Lubricated Hertzian Contacts (EHL). Part 1: Two-Dimensional Contacts (Line Contacts)
,” ESDU Paper No. 85027.
10.
Harris
,
T. A.
, and
Kotzalas
,
M. N.
,
2007
,
Rolling Bearing Analysis
,
5th ed.
, (Advanced Concepts of Bearing Technology),
CRC
,
Boca Raton, FL
.
11.
Ohno
,
H.
, and
Matsumoto
,
S.
,
2011
, “
Effect of Base Oil Viscosity of Grease on Lubricating Condition of Ball Type Linear Motion Rolling Bearing
,”
J. Jpn. Soc. Tribol.
,
56
(
6
), pp.
371
377
(in Japanese).
12.
Al-Dossary
,
S.
,
Hamzah
,
R. I. R.
, and
Mba
,
D.
,
2009
, “
Observations of Changes in Acoustic Emission Waveform for Varying Seeded Defect Sizes in a Rolling Element Bearing
,”
Appl. Acous.
,
70
(
1
), pp.
58
81
.10.1016/j.apacoust.2008.01.005
13.
NSK Ltd.
,
2003
, “Precision Machine Components,” CAT No. E616a.
14.
Okamoto
,
J.
,
Nakayama
,
K.
, and
Soto
,
M.
,
1993
,
Introduction to Tribology
,
3rd ed.
,
Saiwai Shobo
,
Tokyo
(in Japanese).
15.
Japanese Society of Tribologists
,
2007
,
Applications of Friction and Wear Testers
,
Yokendo
,
Tokyo
(in Japanese).
16.
Esfahanian
,
M.
, and
Hamrock
,
B. J.
,
1991
, “
Fluid-Film Lubrication Regimes Revisited
,”
STLE Tribol. Trans.
,
34
(
4
), pp.
628
632
.10.1080/10402009108982081
17.
Hamrock
,
B. J.
, and
Dowson
,
D.
,
1977
, “
Isothermal Elastohydrodynamic Lubrication of Point Contacts, Part III-Fully Flooded Results
,”
ASME J. Lubr. Tech.
,
99
, pp.
264
276
.10.1115/1.3453074
18.
Wu
,
C. S.
,
Klaus
,
E. E.
, and
Duda
,
J. L.
,
1989
, “
Development of Method for the Prediction of Pressure-Viscosity Coefficient of Lubricating Oils Based on Free-Volume Theory
,”
ASME J. Tribol.
,
111
, pp.
121
128
.10.1115/1.3261861
You do not currently have access to this content.