Design consideration and potential of the Milner CVT

Adrian Hunt, Sam Akehurst, Stuart Schaaf

Research output: Contribution to conferencePaper

Abstract

The Milner continuously variable transmission (MCVT) is a transmission device based on rolling contacts analogous to those found in an angular contact roller bearing. The MCVT is particularly applicable to very high power density applications or those with very demanding packaging constraints, due primarily to the existence of multiple traction contacts on each of the rolling elements. Initial testing of a 12kW MCVT prototype was undertaken in 1999 with promising results [1]. This lead to the further development and testing of a 2 nd prototype MCVT rated to 60kW, however the design target of this device was not achieved and performance was hampered by a loss of traction capacity compared to the design specification. The work presented in this paper highlights work undertaken on a full dynamic simulation and analysis of the MCVT and identifies the failure mode of the 2nd MCVT prototype and as a result a redesign of this device has been undertaken such that it can obtain its original design targets.

Conference

ConferenceIPDS 2006: Integrated Powertrain and Driveline Systems 2006
CountryUK United Kingdom
CityDunton, Essex
Period14/06/0615/06/06

Fingerprint

Roller bearings
Testing
Dynamic analysis
Failure modes
Packaging
Specifications
Computer simulation

Keywords

  • Product design
  • Computer simulation
  • Traction (friction)
  • Rolling
  • Bearings (machine parts)
  • Variable speed transmissions

Cite this

Hunt, A., Akehurst, S., & Schaaf, S. (2006). Design consideration and potential of the Milner CVT. 51-66. Paper presented at IPDS 2006: Integrated Powertrain and Driveline Systems 2006, Dunton, Essex, UK United Kingdom.

Design consideration and potential of the Milner CVT. / Hunt, Adrian; Akehurst, Sam; Schaaf, Stuart.

2006. 51-66 Paper presented at IPDS 2006: Integrated Powertrain and Driveline Systems 2006, Dunton, Essex, UK United Kingdom.

Research output: Contribution to conferencePaper

Hunt, A, Akehurst, S & Schaaf, S 2006, 'Design consideration and potential of the Milner CVT' Paper presented at IPDS 2006: Integrated Powertrain and Driveline Systems 2006, Dunton, Essex, UK United Kingdom, 14/06/06 - 15/06/06, pp. 51-66.
Hunt A, Akehurst S, Schaaf S. Design consideration and potential of the Milner CVT. 2006. Paper presented at IPDS 2006: Integrated Powertrain and Driveline Systems 2006, Dunton, Essex, UK United Kingdom.
Hunt, Adrian ; Akehurst, Sam ; Schaaf, Stuart. / Design consideration and potential of the Milner CVT. Paper presented at IPDS 2006: Integrated Powertrain and Driveline Systems 2006, Dunton, Essex, UK United Kingdom.16 p.
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AB - The Milner continuously variable transmission (MCVT) is a transmission device based on rolling contacts analogous to those found in an angular contact roller bearing. The MCVT is particularly applicable to very high power density applications or those with very demanding packaging constraints, due primarily to the existence of multiple traction contacts on each of the rolling elements. Initial testing of a 12kW MCVT prototype was undertaken in 1999 with promising results [1]. This lead to the further development and testing of a 2 nd prototype MCVT rated to 60kW, however the design target of this device was not achieved and performance was hampered by a loss of traction capacity compared to the design specification. The work presented in this paper highlights work undertaken on a full dynamic simulation and analysis of the MCVT and identifies the failure mode of the 2nd MCVT prototype and as a result a redesign of this device has been undertaken such that it can obtain its original design targets.

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