Advanced SearchSearch Tips
Analysis of Pumping Characteristics of a Multistage Roots Pump
facebook(new window)  Pirnt(new window) E-mail(new window) Excel Download
 Title & Authors
Analysis of Pumping Characteristics of a Multistage Roots Pump
In, S.R.; Kang, S.P.;
  PDF(new window)
The practical pumping speed of a dry pump is considerably lower than the intrinsic speed because of back-streaming through finite gaps of the rotor assembly. The maximum compression ratio and the ultimate pressure of the pump are also directly influenced by the back-streaming rate. Therefore, information on the gap conductance, which determines the back-streaming characteristics of the rotor assembly, is the most important key for estimating the pumping performance of a dry pump. In this paper, the feasibility of calculating analytically the pumping performance of a multi-stage Roots pump, one of the most popular types of dry pumps, by quantifying the gap conductance in a rational way, is discussed.
Roots pump;Gap conductance;Back-streaming;Multi-stage;
 Cited by
B. N. Cole, J. F. Groves, and B. W. Imrie, Proc. Instrn. Mech. Engrs. 184, Pt3R, 114 (1969-70)

L. C. Valdes, R. Theis, B. Barthod, and B. Desmet, Vacuum 48, 839 (1997). crossref(new window)

A. Burmistrov, L. Bolyaev, P. Ossipov, M. Fomina, and R. Khannanov, Vacuum 62, 331 (2001). crossref(new window)

A. M. Joshi, D. I. Blekhman, J. D. Felske, J. A. Lori, and J. C. Mollendeof, Inter. J. of Rotating Machinery, Article ID79084, 1 (2006).

S. H. Bae, S. R. In, K. H. Chung, Y. H. Shin, Y. P. Lee, Vacuum Technology (New Books on Science and Technology 18, The Korea Economic Daily, Seoul, 2004), pp 87.

J. M. Lafferty Ed., Foundations of Vacuum Science and Technology (John Wiley & Sons, N.Y., 1999) pp 129.