Design theory and optimization method of a hybrid composite rotor for an ultracentrifuge

Lee, Hak Gu; Park, Jisang; Kim, Ji Hoon

doi:10.1016/j.mechmachtheory.2012.09.001

Cited by 2 publications

(1 citation statement)

References 12 publications

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“…However, unfortunately fibrous sleeve do not has its superior strengths in all directions, their radial strength is very weak and almost up to 30 times lower than that of the circumferential. 3,4 Although the stress solution of a single-layer ring is given in the literature, 5 the main literatures available in the bibliography are preliminarily limited to flywheel rotors, [6][7][8] with a few publications about ultra-high-speed PM rotor. In general, high-speed flywheel rotors are multi-layer composite structures which are assembled by fiberreinforced sleeves.…”

Section: Introductionmentioning

confidence: 99%

Strength analytical solution to ultra-high-speed permanent magnet rotor considering temperature gradient and segmental permanent magnet effect

Cheng

Deng

Xiao

et al. 2019

Advances in Mechanical Engineering

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Ultra-high-speed permanent magnet synchronous motors usually adopt the rotor in which a sleeve is interference fitted onto a ring permanent magnet or segmental permanent magnets. The rotors are always subject to the extreme working condition (e.g. high speed and high temperature). In order to predict the strength of the rotor, this article proposes analytical models considering three types of stress sources such as interference fit, centrifugal force, and temperature gradient. Examples are calculated and discussed. Results show that the effect of the temperature gradient on sleeve stresses is slight; however, the influence of the temperature gradient on stresses of the permanent magnet and shaft is dramatic; for the rotor with a outer surface forced air cooling, the shaft will generate a large radial expansion which causes a addition pressure effect on the permanent magnet and sleeve to prevent loosening and stripping of the interfaces. Moreover, segmental permanent magnets are helpful to reduce stress. The study will give a useful hint for the optimal design and manufacture of the ultra-high-speed permanent magnet rotor.

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Section: Introductionmentioning

confidence: 99%

Strength analytical solution to ultra-high-speed permanent magnet rotor considering temperature gradient and segmental permanent magnet effect

Cheng

Deng

Xiao

et al. 2019

Advances in Mechanical Engineering

View full text Add to dashboard Cite

show abstract

Note: Rotor design optimization for vacuum chamber-free ultracentrifuge

Lee

Kim

2018

Review of Scientific Instruments

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This paper proposes a fixed-angle rotor design for a vacuum chamber-free ultracentrifuge using a rigid shaft and magnetic bearings. The rotor is designed for a stable operation in the ultracentrifugation region with air friction. And the optimal design parameters and optimized connection method of the rotor and rigid shaft are proposed. The proposed rotor structure can withstand a maximum rotation speed of 100 000 rpm and achieves a maximum relative centrifugal force of 600 000 g. To verify the performance of the proposed rotor design with a rigid shaft, finite-element analysis, an impact test, and a drive operating experiment were conducted.

show abstract

Design theory and optimization method of a hybrid composite rotor for an ultracentrifuge

Cited by 2 publications

References 12 publications

Strength analytical solution to ultra-high-speed permanent magnet rotor considering temperature gradient and segmental permanent magnet effect

Strength analytical solution to ultra-high-speed permanent magnet rotor considering temperature gradient and segmental permanent magnet effect

Note: Rotor design optimization for vacuum chamber-free ultracentrifuge

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