Ultrasonic motor performance influenced by lubricant properties

Wei Qiu*, Yosuke Mizuno, Koshi Adachi, Kentaro Nakamura

*Corresponding author for this work

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Functional lubrication has been shown to be a promising method for improving the performance of ultrasonic motors (USMs). However, the complex lubrication mechanisms have not been studied and the effect of the lubricant properties on motor performance remains unknown. In this paper, both low-traction fluids and high-traction fluids with a wide viscosity range are applied, and the lubricating effects are investigated in hybrid transducer-type ultrasonic motors. The results clearly show that high-traction fluids have significant superiority to low-traction fluids in terms of motor efficiency and reduction of friction loss at the entire range of the applied preload. A high friction coefficient in boundary lubrication regime and efficient modulation in friction are confirmed to be essential for achieving high-performance lubricated USMs. It is also found that the motor performance is independent of lubricant viscosities in the tested range, irrespective of lubricant types. The reasons for the distinct lubricating effects with the two types of lubricants are analyzed in detail, which leads to the criteria of selecting lubricants and more understanding in the lubrication mechanisms in USMs.
Original languageEnglish
JournalSensors and Actuators A: Physical
Volume282
Pages (from-to)183-191
Number of pages9
ISSN0924-4247
DOIs
Publication statusPublished - 2018

Keywords

  • Ultrasonic motors
  • Efficiency
  • Torque
  • Lubricant
  • Viscosity
  • Lubrication mechanisms

Cite this

Qiu, Wei ; Mizuno, Yosuke ; Adachi, Koshi ; Nakamura, Kentaro. / Ultrasonic motor performance influenced by lubricant properties. In: Sensors and Actuators A: Physical. 2018 ; Vol. 282. pp. 183-191.
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title = "Ultrasonic motor performance influenced by lubricant properties",
abstract = "Functional lubrication has been shown to be a promising method for improving the performance of ultrasonic motors (USMs). However, the complex lubrication mechanisms have not been studied and the effect of the lubricant properties on motor performance remains unknown. In this paper, both low-traction fluids and high-traction fluids with a wide viscosity range are applied, and the lubricating effects are investigated in hybrid transducer-type ultrasonic motors. The results clearly show that high-traction fluids have significant superiority to low-traction fluids in terms of motor efficiency and reduction of friction loss at the entire range of the applied preload. A high friction coefficient in boundary lubrication regime and efficient modulation in friction are confirmed to be essential for achieving high-performance lubricated USMs. It is also found that the motor performance is independent of lubricant viscosities in the tested range, irrespective of lubricant types. The reasons for the distinct lubricating effects with the two types of lubricants are analyzed in detail, which leads to the criteria of selecting lubricants and more understanding in the lubrication mechanisms in USMs.",
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author = "Wei Qiu and Yosuke Mizuno and Koshi Adachi and Kentaro Nakamura",
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Ultrasonic motor performance influenced by lubricant properties. / Qiu, Wei; Mizuno, Yosuke; Adachi, Koshi; Nakamura, Kentaro.

In: Sensors and Actuators A: Physical, Vol. 282, 2018, p. 183-191.

Research output: Contribution to journalJournal articleResearchpeer-review

TY - JOUR

T1 - Ultrasonic motor performance influenced by lubricant properties

AU - Qiu, Wei

AU - Mizuno, Yosuke

AU - Adachi, Koshi

AU - Nakamura, Kentaro

PY - 2018

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N2 - Functional lubrication has been shown to be a promising method for improving the performance of ultrasonic motors (USMs). However, the complex lubrication mechanisms have not been studied and the effect of the lubricant properties on motor performance remains unknown. In this paper, both low-traction fluids and high-traction fluids with a wide viscosity range are applied, and the lubricating effects are investigated in hybrid transducer-type ultrasonic motors. The results clearly show that high-traction fluids have significant superiority to low-traction fluids in terms of motor efficiency and reduction of friction loss at the entire range of the applied preload. A high friction coefficient in boundary lubrication regime and efficient modulation in friction are confirmed to be essential for achieving high-performance lubricated USMs. It is also found that the motor performance is independent of lubricant viscosities in the tested range, irrespective of lubricant types. The reasons for the distinct lubricating effects with the two types of lubricants are analyzed in detail, which leads to the criteria of selecting lubricants and more understanding in the lubrication mechanisms in USMs.

AB - Functional lubrication has been shown to be a promising method for improving the performance of ultrasonic motors (USMs). However, the complex lubrication mechanisms have not been studied and the effect of the lubricant properties on motor performance remains unknown. In this paper, both low-traction fluids and high-traction fluids with a wide viscosity range are applied, and the lubricating effects are investigated in hybrid transducer-type ultrasonic motors. The results clearly show that high-traction fluids have significant superiority to low-traction fluids in terms of motor efficiency and reduction of friction loss at the entire range of the applied preload. A high friction coefficient in boundary lubrication regime and efficient modulation in friction are confirmed to be essential for achieving high-performance lubricated USMs. It is also found that the motor performance is independent of lubricant viscosities in the tested range, irrespective of lubricant types. The reasons for the distinct lubricating effects with the two types of lubricants are analyzed in detail, which leads to the criteria of selecting lubricants and more understanding in the lubrication mechanisms in USMs.

KW - Ultrasonic motors

KW - Efficiency

KW - Torque

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KW - Viscosity

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