An energy-saving anti-inclined lifting permanent magnet

ABSTRACT

The lifting permanent magnet is a new type of magnetic transport device consisting of a mechanical driving mechanism and a permanent magnet system. It can reduce power consumption as opposed to lifting electromagnet. However, the single-drive mechanism could not be used in the inclined condition, and how to calculate the balance working point of the magnetic circuit with several permanent magnet limits its application and development. In this paper, an anti-inclined mechanism with double drive mechanism was designed and implemented. The concentric shafts and the reversing gear were adopted to realise synchronous rotation. For the permanent magnet system, the iteration method for multi-magnets balance working point analysis is proposed and implemented. Based on the prototype experiment, the anti-inclined lifting permanent magnet hoisted a 1 ton weight workpiece successfully at an inclination angle of 30 degrees. And the measurement experiment proved that the iteration method is more precise than the conventional isolated method and is a better preparation for analysing the magnetic force and residual magnetic field strength.

KEYWORDS:

• energy-saving
• lifting permanent magnet
• iteration method for magnetic circuit analysis
• anti-inclined mechanism

Acknowledgments

The research project was supported by Jilin Industrial Technology and Development Program (2018C043-2), China, and Jilin Scientific and Technological Development Program (20200401111GX), China. The authors express their sincere thanks to the Changchun Changhang Hydraulic Co. LTD and Zhang Shihong and Li Qinghua. Thanks for their assistance in the prototyping process.

Disclosure statement

No potential conflict of interest was reported by the author(s).

Additional information

Funding

This work was supported by the Jilin Scientific and Technological Development Program [20200401111GX] and Industrial Technology and Development Plan of Jilin Province [2018C043-2].

Notes on contributors

Ning Ding

Ning Ding is a professor of the School of Mechanical engineering, Changchun University. Her Research Area includes the design and development of magnetic machinery and its theory, and the intelligent monitoring of precision and ultra-precision machining.

Chao Liu

Chao Liu is a doctor candidate of the School of Mechanical and Aerospace engineering, Jilin University.