An investigation of cam-roller mechanism applied in sphere cam engine
Autor: | Haijun Xu, Lei Zhang, Cunyun Pan, Xiaojun Xu, Zheng-zhou Zhang |
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Rok vydání: | 2016 |
Předmět: |
Surface (mathematics)
Power transmission Engineering business.industry 020209 energy Work (physics) Metals and Alloys General Engineering Mechanical engineering 02 engineering and technology Power (physics) Cylinder (engine) law.invention Mechanism (engineering) Piston Cam engine law 0202 electrical engineering electronic engineering information engineering business |
Zdroj: | Journal of Central South University. 23:825-833 |
ISSN: | 2227-5223 2095-2899 |
DOI: | 10.1007/s11771-016-3129-6 |
Popis: | As an alternative power source for hybrid electrical vehicle(HEV), electric generating system(EGS) driven by sphere cam engine(SCE) is said to own higher power density and integration. In this work, the structure and working principle of EGS were introduced, based on which the advantages of EGS were displayed. The profile of sphere cam was achieved after the desired motion of piston was given. After establishing the dynamic model of power transmission mechanism, the characteristics of cam-roller mechanism were studied. The results show that the optimal cam profile of SCE is a sinusoid curve which has two peaks and two valleys and a mean pressure angle of 47.19°. Because of the special cam shape, the trace of end surface center of piston is an eight-shape curve on a specific sphere surface. SCE running at speed of 3000 r/min can generate the power of 33.81 kW, which could satisfy the need of HEVs. However, the force between cylinder and piston skirt caused by Coriolis acceleration can reach up to 1182 N, which leads to serious wear between cylinder liner and piston skirt and may shorten the lifespan of SCE. |
Databáze: | OpenAIRE |
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