| Sine-pump is a new type of displacement pumps. The rotor is one of Sine-pump's core components and it owns a design of sine-wave shape, which prevents the fluid from being sheared while it is delivered in Sine-pump. The flow pulsation of Sine-pump is almost zero. Sine-pump is widely used in food industry, beverage industry, cosmetics industry and chemical industry, etc. The customers benefit from Sine-pump's good performance. However, the data on Sine-pump is limited at home and abroad, not to mention its research methods. According to this problem, the basic research on Sine-pump's structure was discussed in this paper, hoping to provide some methods and ideas for its design.The operating principle, technical features, as well as the application and research status of Sine-pump was introduced in this paper. The structure of sine-pump's rotor was studied in this paper, the mathematical model of the rotor's surface was established and its basic properties were obtained in this paper. The formulas of Sine-pump's instantaneous flow and displacement were deduced, the efficiency of Sine-pump was qualitative analysed. The largest size of spherical material that the Sine-pump can accommodate was discussed. The optimization design on rotor and scraper was made, meanwhile Sine-pump's other main parts such as scraper-guide, liner, pump-housing and shaft were also designed. After simple theoretical analysis on fluid's motion in Sine-pump, the fluid field of Sine-pump was simply simulated in FLUENT simulation software.The distribution of pressure field,speed field and turbulence intensity was obtained. It provided a theory basis for further optimization design of the rotor.
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