Design and Development of a High Efficiency Air Turbine Spindle for Small-Part Machining

Paul Harris; Michael Wintterer; David Jasper; Barbara Linke; Christian Brecher; Stephen Spence

doi:10.1007/s40684-019-00105-5

Design and Development of a High Efficiency Air Turbine Spindle for Small-Part Machining

Paul Harris, Michael Wintterer, David Jasper, Barbara Linke, Christian Brecher, Stephen Spence

School of Mechanical and Aerospace Engineering

Research output: Contribution to journal › Article › peer-review

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Abstract

This paper reports on the development of a high efficiency and low inertia miniature pneumatic turbine for ultra-high-speed manufacturing spindle applications. It is proposed that radial-inflow/axial-outflow type turbines are well suited for micro-machining spindles. To validate the turbine performance potential, a proof-of-concept prototype turbo-spindle was developed and experimentally tested. The prototype spindle produced a net mechanical power output of over 60 W at a speed of 90,000 rpm. The experimental results demonstrate a micro-turbine efficiency of over 50% and a turbine power output of approximately 100 W. This compares to a typical turbine efficiency of around 20% in commercial micro-machining spindles. Further potential improvements to both turbine and spindle energy efficiency are outlined.

Original language	English
Article number	JPGT-D-18-00095R2
Journal	International Journal of Precision Engineering and Manufacturing-Green Technology
Early online date	07 Jun 2019
DOIs	https://doi.org/10.1007/s40684-019-00105-5
Publication status	Early online date - 07 Jun 2019

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10.1007/s40684-019-00105-5Licence: CC BY

Design and Development of a High Efciency Air Turbine Spindle for Small‑Part Machining
Copyright 2019 the authors. This is an open access article published under a Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium, provided the author and source are cited
Final published version, 2.14 MBLicence: CC BY

Cite this

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abstract = "This paper reports on the development of a high efficiency and low inertia miniature pneumatic turbine for ultra-high-speed manufacturing spindle applications. It is proposed that radial-inflow/axial-outflow type turbines are well suited for micro-machining spindles. To validate the turbine performance potential, a proof-of-concept prototype turbo-spindle was developed and experimentally tested. The prototype spindle produced a net mechanical power output of over 60 W at a speed of 90,000 rpm. The experimental results demonstrate a micro-turbine efficiency of over 50% and a turbine power output of approximately 100 W. This compares to a typical turbine efficiency of around 20% in commercial micro-machining spindles. Further potential improvements to both turbine and spindle energy efficiency are outlined.",

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AU - Brecher, Christian

AU - Spence, Stephen

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AB - This paper reports on the development of a high efficiency and low inertia miniature pneumatic turbine for ultra-high-speed manufacturing spindle applications. It is proposed that radial-inflow/axial-outflow type turbines are well suited for micro-machining spindles. To validate the turbine performance potential, a proof-of-concept prototype turbo-spindle was developed and experimentally tested. The prototype spindle produced a net mechanical power output of over 60 W at a speed of 90,000 rpm. The experimental results demonstrate a micro-turbine efficiency of over 50% and a turbine power output of approximately 100 W. This compares to a typical turbine efficiency of around 20% in commercial micro-machining spindles. Further potential improvements to both turbine and spindle energy efficiency are outlined.

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Design and Development of a High Efficiency Air Turbine Spindle for Small-Part Machining

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