Vacuumizing system and method for vacuum cabin of ramjet engine
A technology of ramjet and vacuum pumping system, which is applied in the direction of engine testing, machine/engine, jet engine testing, etc. It can solve the problems of limited ramjet test capability, inability to meet large flow conditions, and small vacuum working range, etc. Achieve the effect of saving test site, compact structure and maintaining stable vacuum degree
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[0027] In order to solve the problem that the vacuum chamber vacuum system of the ramjet engine cannot meet the large flow conditions. The invention provides a vacuum system and method for a vacuum chamber of a ram engine.
[0028] Such as figure 1 As shown, the system includes a steam source 1, a steam distributor 2, a primary ejector 3, a secondary ejector 4, a silencer tower 5, and a switching valve 6;
[0029] The first-stage injection device 3 and the second-stage injection device 4 are connected in series, the steam inlet of the first-stage injection device 3 is connected to the steam distributor 2 through the switching valve 6; the steam inlet of the second-stage injection device 4 is connected to the steam distributor 2 Connected; the steam outlet of the secondary ejector 4 is connected to the external environment through the muffler tower 5; the vacuum inlet of the primary ejector 3 is connected with the vacuum chamber 7 to be evacuated; the steam distributor 2 is connecte...
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