Spiral spring is widely used in mechanisms, such as mechanical watch movements and clocks where the spiral spring is used for timekeeping. According to literature, there are only a few studies on spiral springs. In this paper, the mechanics of spiral springs is analyzed in details, and its dynamic performance in mechanical watch movements is further studied to find out its natural frequency, which is the most critical parameter for mechanical watch movements. Based on Castigliano's theorem, the mathematical model of dynamic deformation and natural frequency of the spiral spring under external axial torque is developed, and computer simulation with Matlab® is also conducted. Experimental validations are carried out, which confirm the simulation results. Experiments show that the analytical method in this paper can be used to guide and facilitate the design of spiral spring.
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March 2014
Technical Briefs
The Mechanics of Spiral Springs and Its Application in Timekeeping
Longhan Xie,
Longhan Xie
School of Mechanical and Automotive Engineering,
South China University of Technology
,Guangzhou 510640
, China
Search for other works by this author on:
Ruxu Du
Ruxu Du
Institute of Precision Engineering,
The Chinese University of Hong Kong
,Hong Kong
, China
Search for other works by this author on:
Longhan Xie
School of Mechanical and Automotive Engineering,
South China University of Technology
,Guangzhou 510640
, China
Ruxu Du
Institute of Precision Engineering,
The Chinese University of Hong Kong
,Hong Kong
, China
Manuscript received October 6, 2011; final manuscript received May 13, 2013; accepted manuscript posted May 29, 2013; published online September 23, 2013. Assoc. Editor: Alexander F. Vakakis.
J. Appl. Mech. Mar 2014, 81(3): 034504 (7 pages)
Published Online: September 23, 2013
Article history
Received:
October 6, 2011
Revision Received:
May 13, 2013
Accepted:
May 29, 2013
Citation
Xie, L., Ko, P., and Du, R. (September 23, 2013). "The Mechanics of Spiral Springs and Its Application in Timekeeping." ASME. J. Appl. Mech. March 2014; 81(3): 034504. https://doi.org/10.1115/1.4024669
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