Optical sensor for journal bearing oil film pressure measurements

Helena Ronkainen, Antti Valkonen, Simo Varjus, Markku Kapulainen, Stungs Ingmar, Ari Hokkanen, Juha Virtanen, Ari Lehto, Juhani Martikainen

Research output: Contribution to journalArticleScientificpeer-review

2 Citations (Scopus)

Abstract

The oil film pressure is one of the fundamental parameters influencing the operation of journal bearings. The oil film pressure is estimated by theoretical calculations, since the measurement of oil film pressure has been a demanding task in journal bearings, especially in bearings carrying dynamic loads. In this study a new approach to experimentally measure the oil film pressure has been developed and tested. The sensor design utilizes the optical fibre technique and the sensor is integrated in the sliding surface of the bearing thus providing the possibility to measure the actual oil film pressure under load without disturbing the contact conditions. The finite element method (FEM) calculations have been used for optimizing the design of the sensor and for ensuring the appropriate mechanical performance of the sensor design. The optical sensor was integrated into a hydrodynamic journal bearing made of bronze and a versatile bearing test rig was used for testing the operation of the optical sensor. The tests were carried out using both static and dynamic loading conditions with different loads and speeds. The experimental data was compared with the simulated one. The results showed that the optical sensor was capable to measure the oil film pressure in journal bearing at real operating conditions and the sensitivity of the sensor was good enough to verify the speed and load effects on the oil film pressure. According to this work, it is possible to increase the knowledge of true operating conditions of journal bearings by using the optical sensor for oil film pressure measurement. The knowledge can be utilized in the development work of safer and more efficient machines and engines with journal bearing carrying high and dynamic loads. This optical sensor configuration can be used also in other applications for measurement and control of pressure.
Original languageEnglish
Article number3-4
Pages (from-to)3-15
JournalTribologia
Volume28
Issue number3-4
Publication statusPublished - 2009
MoE publication typeA1 Journal article-refereed

Fingerprint

Journal bearings
Optical sensors
Pressure measurement
Bearings (structural)
Sensors
Dynamic loads
Oils
Bronze
Optical fibers
Hydrodynamics
Engines
Finite element method
Testing

Keywords

  • optical sensor
  • journal bearing
  • oil film pressure

Cite this

Ronkainen, Helena ; Valkonen, Antti ; Varjus, Simo ; Kapulainen, Markku ; Ingmar, Stungs ; Hokkanen, Ari ; Virtanen, Juha ; Lehto, Ari ; Martikainen, Juhani. / Optical sensor for journal bearing oil film pressure measurements. In: Tribologia. 2009 ; Vol. 28, No. 3-4. pp. 3-15.
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abstract = "The oil film pressure is one of the fundamental parameters influencing the operation of journal bearings. The oil film pressure is estimated by theoretical calculations, since the measurement of oil film pressure has been a demanding task in journal bearings, especially in bearings carrying dynamic loads. In this study a new approach to experimentally measure the oil film pressure has been developed and tested. The sensor design utilizes the optical fibre technique and the sensor is integrated in the sliding surface of the bearing thus providing the possibility to measure the actual oil film pressure under load without disturbing the contact conditions. The finite element method (FEM) calculations have been used for optimizing the design of the sensor and for ensuring the appropriate mechanical performance of the sensor design. The optical sensor was integrated into a hydrodynamic journal bearing made of bronze and a versatile bearing test rig was used for testing the operation of the optical sensor. The tests were carried out using both static and dynamic loading conditions with different loads and speeds. The experimental data was compared with the simulated one. The results showed that the optical sensor was capable to measure the oil film pressure in journal bearing at real operating conditions and the sensitivity of the sensor was good enough to verify the speed and load effects on the oil film pressure. According to this work, it is possible to increase the knowledge of true operating conditions of journal bearings by using the optical sensor for oil film pressure measurement. The knowledge can be utilized in the development work of safer and more efficient machines and engines with journal bearing carrying high and dynamic loads. This optical sensor configuration can be used also in other applications for measurement and control of pressure.",
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Ronkainen, H, Valkonen, A, Varjus, S, Kapulainen, M, Ingmar, S, Hokkanen, A, Virtanen, J, Lehto, A & Martikainen, J 2009, 'Optical sensor for journal bearing oil film pressure measurements', Tribologia, vol. 28, no. 3-4, 3-4, pp. 3-15.

Optical sensor for journal bearing oil film pressure measurements. / Ronkainen, Helena; Valkonen, Antti; Varjus, Simo; Kapulainen, Markku; Ingmar, Stungs; Hokkanen, Ari; Virtanen, Juha; Lehto, Ari; Martikainen, Juhani.

In: Tribologia, Vol. 28, No. 3-4, 3-4, 2009, p. 3-15.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Optical sensor for journal bearing oil film pressure measurements

AU - Ronkainen, Helena

AU - Valkonen, Antti

AU - Varjus, Simo

AU - Kapulainen, Markku

AU - Ingmar, Stungs

AU - Hokkanen, Ari

AU - Virtanen, Juha

AU - Lehto, Ari

AU - Martikainen, Juhani

PY - 2009

Y1 - 2009

N2 - The oil film pressure is one of the fundamental parameters influencing the operation of journal bearings. The oil film pressure is estimated by theoretical calculations, since the measurement of oil film pressure has been a demanding task in journal bearings, especially in bearings carrying dynamic loads. In this study a new approach to experimentally measure the oil film pressure has been developed and tested. The sensor design utilizes the optical fibre technique and the sensor is integrated in the sliding surface of the bearing thus providing the possibility to measure the actual oil film pressure under load without disturbing the contact conditions. The finite element method (FEM) calculations have been used for optimizing the design of the sensor and for ensuring the appropriate mechanical performance of the sensor design. The optical sensor was integrated into a hydrodynamic journal bearing made of bronze and a versatile bearing test rig was used for testing the operation of the optical sensor. The tests were carried out using both static and dynamic loading conditions with different loads and speeds. The experimental data was compared with the simulated one. The results showed that the optical sensor was capable to measure the oil film pressure in journal bearing at real operating conditions and the sensitivity of the sensor was good enough to verify the speed and load effects on the oil film pressure. According to this work, it is possible to increase the knowledge of true operating conditions of journal bearings by using the optical sensor for oil film pressure measurement. The knowledge can be utilized in the development work of safer and more efficient machines and engines with journal bearing carrying high and dynamic loads. This optical sensor configuration can be used also in other applications for measurement and control of pressure.

AB - The oil film pressure is one of the fundamental parameters influencing the operation of journal bearings. The oil film pressure is estimated by theoretical calculations, since the measurement of oil film pressure has been a demanding task in journal bearings, especially in bearings carrying dynamic loads. In this study a new approach to experimentally measure the oil film pressure has been developed and tested. The sensor design utilizes the optical fibre technique and the sensor is integrated in the sliding surface of the bearing thus providing the possibility to measure the actual oil film pressure under load without disturbing the contact conditions. The finite element method (FEM) calculations have been used for optimizing the design of the sensor and for ensuring the appropriate mechanical performance of the sensor design. The optical sensor was integrated into a hydrodynamic journal bearing made of bronze and a versatile bearing test rig was used for testing the operation of the optical sensor. The tests were carried out using both static and dynamic loading conditions with different loads and speeds. The experimental data was compared with the simulated one. The results showed that the optical sensor was capable to measure the oil film pressure in journal bearing at real operating conditions and the sensitivity of the sensor was good enough to verify the speed and load effects on the oil film pressure. According to this work, it is possible to increase the knowledge of true operating conditions of journal bearings by using the optical sensor for oil film pressure measurement. The knowledge can be utilized in the development work of safer and more efficient machines and engines with journal bearing carrying high and dynamic loads. This optical sensor configuration can be used also in other applications for measurement and control of pressure.

KW - optical sensor

KW - journal bearing

KW - oil film pressure

M3 - Article

VL - 28

SP - 3

EP - 15

JO - Tribologia

JF - Tribologia

SN - 0780-2285

IS - 3-4

M1 - 3-4

ER -