CoiLeaf spring: A hybrid system of coil and leaf springs for maximizing space utilization and energy storage. (December 2022)

• Record Type: Journal Article
• Authors: Moon, Junyoung; Ryu, Jaewook; Kim, Jehyeok; Lee, Giuk
• Is Part Of: Mechanism and machine theory. Volume 178(2022)
• Publication Date: 2022-12
• Subjects: Energy storage -- Finite element analysis -- Hybrid spring system -- Space utilization -- Spring shape optimization; Machine theory -- Periodicals; Machinery -- Periodicals; Machines -- Périodiques; Génie mécanique -- Périodiques; Machine theory; Machinery; Periodicals; 621.81
• DOI: 10.1016/j.mechmachtheory.2022.105094
• Languages: English
• ISSNs: 0094-114X

Abstract

Highlights: CoiLeaf spring using a combination of compression coil springs and leaf springs is presented Combining two types of springs exhibits superior space utilization and energy storage performance CoiLeaf spring achieved 5.47 times higher energy storage performance in CVGC Optimization process by linking FEA software with mathematical computing software Abstract: We present a hybrid spring system called CoiLeaf spring that offers superior space utilization and energy-storage performance by employing a combination of compression coil springs and leaf springs. The concept of this spring was verified in the design space of a compact variable gravity compensator (CVGC) developed by our group. Initially, we defined the space available for spring utilization in the CVGC as the Γ-space and allocated it to two design spaces for compression coil springs and leaf springs. Next, we derived the design constraints for the springs and optimized the compression coil spring on the basis of these constraints. Then, we selected a commercially available spring that was the closest to the optimized one. By contrast, the custom-fabricated leaf spring was optimally designed to maximize energy storage. Thereafter, we used Python scripting to construct the optimization process by linking finite element analysis software with mathematical computing software. Finally, we fabricated the proposed CoiLeaf spring. The energy storage capacity of the CoiLeaf spring system was experimentally measured as 11.38 J. Compared to the general systems utilized in the Γ-space, the maximum energy-storage capacity of the proposed CoiLeaf spring system was 5.47 times higher.© 2017 Elsevier Inc. All rights reserved.