Title:
GAS-JET EJECTOR
Document Type and Number:
WIPO Patent Application WO/1990/011450
Kind Code:
A1
Abstract:
A gas-jet ejector comprises a casing (1) in which are mounted, coaxially and consecutively along the gas path, a receiving chamber (2) intended for connection with the volume to be evacuated, a mixing chamber (3) and a diffuser (4) connected to a vacuum pump. In the receiving chamber (2) is coaxially mounted a Laval nozzle (5) connected to the outside atmosphere. The geometry of the critical cross-section of the Laval nozzle (5), of its outlet cross-section and of the inlet and outlet cross-sections of the mixing chamber (3) provides for a 1.35 to 1.80-fold increase of the volume output at the end face of the diffuser (4).
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Inventors:
RAIZMAN ISAK ABRAMOVICH (SU)
PIROGOV VALERY ALEXANDROVICH (SU)
PIROGOV VALERY ALEXANDROVICH (SU)
Application Number:
PCT/SU1989/000068
Publication Date:
October 04, 1990
Filing Date:
March 17, 1989
Export Citation:
Assignee:
KZ KHIM T I IM S (SU)
International Classes:
F04F5/20; F04F5/36; F04F5/44; (IPC1-7): F04F5/20
Foreign References:
| SU291052A1 | ||||
| US3545886A | 1970-12-08 | |||
| SU459616A1 | 1975-02-05 | |||
| SU629369A1 | 1978-10-25 |
Other References:
MASHINOSTROENIE, (Moscow), 1973, V.A. USPENSKY et al., "Struinye Vakuumnye Nasosy", page 114.
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