On the dynamics of a high frequency oscillator for mechanical watches. (November 2017)

• Record Type: Journal Article
• Authors: Robuschi, N.; Braghin, F.; Corigliano, A.; Ghisi, A.; Tasora, A.
• Is Part Of: Mechanism and machine theory. Volume 117(2017:Nov.)
• Page Start: 276
• Page End: 293
• Publication Date: 2017-11
• Subjects: Wrist watch -- Mechanical regulator -- Compliant hinge -- Isochronism -- Quality factor -- FE -- CFD -- Multi-body; Machine theory -- Periodicals; Machinery -- Periodicals; Machines -- Périodiques; Génie mécanique -- Périodiques; Machine theory; Machinery; Periodicals; 621.81
• DOI: 10.1016/j.mechmachtheory.2017.07.013
• Languages: English
• ISSNs: 0094-114X

Abstract

Highlights: A new mechanical regulator for wrist watches is proposed. Mathematical model of the complete device. Elasto-kinematic optimization of the structure. Evaluation of the oscillator's quality factor considering structural and aerodynamic damping. The chronometric performances of the regulator have been assessed. Abstract: This paper presents a new mechanical regulator for wrist watches, highlighting the methodology used to set up a comprehensive model of the device. The mechanical regulator, which is characterized by a high frequency monolithic oscillator made of monocrystalline silicon coupled to a deadbeat escapement, has been designed to provide a high quality factor, a condition necessary to guarantee enhanced chronometric performances compared to traditional mechanical regulators. The chronometric performances and the isochronism of the oscillating system have been assessed by means of a multi-body model whose parameters have been evaluated by FE and CFD simulations.