Author(s)

Tao Chen, Xudong Liao, Yingjun Huang, Guoyun Bai, Bo Li

Corresponding Author

Tao Chen

ABSTRACT

This paper aims at a method’s research of the item of the time of limitation vacuum degree in pumping vacuum of big vessel. The relation of time constant and limitation vacuum degree was researched by analyzing the dynamic variation rule in pumped vacuum process. The time of limitation Vacuum degree was obtained by least square method linear regression for vacuum degree dynamic variation data, and then the time of limitation vacuum degree was achieved. On account of that method, a software obtained the time constant of limitation vacuum degree was developed, and the forecast of limitation vacuum degree time has been realized. At last, this method was tested and verified in a project application. The result indicated that this method was very reasonable to acquire the time of limitation vacuum, and was consistent with theoretical analysis. So the method could provide some theoretical direction and has definite worth of engineered application.

KEYWORDS

Limit Vacuum, time-constant least square method