Otkrytoe Aktsionernoe Obschestvo

Otkrytoe Aktsionernoe Obschestvo Nauchno-proizvodstvennoe Obiedinenie

Oktrytoe Aktsionernoe Obschestvo 'nauchno-proizvodstvennoe Obiedinenie

Galina Andreevna Babaeva

Alexandr Alexandrovich Vasin

Jury Alexandrovich Pestov

Gennady Grigorievich Derkach

Boris Ivanovich Katorgin

Vladimir Konstantinovich Chvanov

Viktor Nikonorovich Semenov

Jury Vasilievich Movchan

Vladimir Fedorov

Vladimir Jurievich Bogushev

Anatoly Ivanovich Grigoriev

Alexandr Nikolaevich Vycherov

Nikolai Kondratievich Dudkin

Nikolai Fedorovich Molev

Nikolai Mikhailovich Grigorkin

Vladimir Vladimirovich Fedorov

Leonid Alexeevich Tumanov

Stanislav Dmitrievich Kamensky

Konstantin Pavlovich Khaplanov

Vladimir Veniaminovich Sagalovich

Evgeny Ivanovich Baranov

Raisa Vasilievna Chernikova

Galina Vasilievna Shashelova

Ljudmila Alexandrovna Anosova

Jury Alexandrovich Bedov

Oleg Ivanovich Studenikin

Aza Fedorovna Atlanova

Evgeny Alexeevich Belov

Dina Ivanovna Dubovik

Margarita Evgenievna Judina

Vadim Iliich Semenov

Alexandr Mikhailovich Kashkarov

Leonid Vasilievich Cherkasov

Felix Jurievich Chelkis

The casing comprises a combustion chamber and a nozzle, consisting of a subsonic and a supersonic sections with an external structural envelope and a fire wall having a ribbed external surface. The regenerative cooling passage is formed between the envelope and the fire wall. The fire wall is made from copper or a copper alloy, and the external structural envelope is made from steel or a nickel alloy. The fire wall has a metal coating stratified in the region of the nozzle throat over a length of not less than 0.3 diameter of the nozzle throat in the longitudinal direction. The first layer of the coating is nickel 50 &mgr;m to 1000 &mgr;m thick, and the second layer is chromium 10 &mgr;m to 500 &mgr;m thick.

Combustion chamber casing of a liquid-fuel rocket engine

A combustion chamber for a liquid-propellant rocket engine includes an injector head jointed to a combustion chamber casing having an exhaust head on a nozzle output. The casing is made of a steel jacket and a bronze-steel internal fire wall, which are joined with each other and contain shells connected in series. The exhaust head with shells of the casing, jointed to the exhaust head, are brazed using a solder on the basis of nickel, chromium and manganese. Parts of the injector head and other members of the combustion chamber casing are brazed using a copper-silver solder. Shells of the fire wall are connected by an electron-beam welding, directing an electron beam into axial gaps left while brazing between shells of the jacket. The shells of the jacket are then sequentially connected by an automatic gas-shielded arc welding through corresponding ring spacers.

Method for producing a welded-brazed combustion chamber

The invention relates to the field of producing the means for protecting the alloys on the nickel base against the influence of corrosive media, and more particularly concerns the metal-ceramic coatings used for protecting the flow parts of the turbines of turbopump liquid-propellant rocket engines (LRE). The composition for producing the metal-ceramic coating consists of nickel and of oxides of barium, boron, aluminum, cerium and zirconium at the following percentage of components by mass: nickel--36-58, barium oxide--16-19, boron oxide--7-13, aluminum oxide--6-9, cerium oxide--14-19, zirconium oxide--1-2. The coating is produced of a slip, that is applied to the pieces by dipping, spraying or flooding. The slip layers are dried in the flow of hot air. The coating is fired in a furnace in the inert gas medium, argon for example, at a temperature of 1000-1100.degree. C. during 0.5-1 hour. The use of the composition for producing a metal-ceramic coating for the pieces and units of complicated shape made of nickel alloys with a layer of nickel secures their serviceability and reliability at a cyclic action of a high-temperature flow of oxidizing generator gas containing the particles of AMg6 alloy at the temperature of up to 900.degree. C.

Compound for producing a metal-ceramic coating

Growing community of inventors

Moscow, Russia

Galina Andreevna Babaeva