Integrated coaxial nozzle of liquid rocket engine and design and manufacturing method of integrated coaxial nozzle
A technology of coaxial nozzles and liquid rockets, which is applied in the direction of rocket engine devices, machines/engines, additive manufacturing, etc., can solve problems such as long nozzle manufacturing cycles, avoid uneven combustion, reduce manufacturing processes, and avoid coaxiality The effect of deviation
Pending Publication Date: 2022-04-29
CAPITAL AEROSPACE MACHINERY
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[0037] The present invention will be further elaborated below in conjunction with embodiment.
[0038] Aiming at the requirement of high-precision and high-efficiency manufacturing of the nozzle in the injector of the liquid rocket engine combustion device, the present invention proposes a structural design and manufacturing scheme of a coaxial nozzle with a flow-stabilizing guide plate according to the functional requirements and the technical characteristics of laser selective melting and additive manufacturing. The overall manufacturing of the integrated coaxial nozzle is realized. The steady flow guide plate in this structural design scheme can avoid the uneven combustion caused by the turbulent flow of the oxidant and fuel in the nozzle, and improve the combustion stability. The laser selective melting additive manufacturing technology can avoid the concentricity deviation caused by the machining and welding process, improve the manufacturing accuracy, and greatly improve...
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Abstract
The invention relates to an integrated coaxial nozzle of a liquid rocket engine. The integrated coaxial nozzle comprises a panel welding and positioning platform, a fuel nozzle steady-flow guide plate, a fuel nozzle, an oxidant nozzle, a fuel inlet, an oxidant nozzle steady-flow guide plate, a midsole welding and positioning platform, a fuel nozzle outer wall and an oxidant nozzle outer wall, the oxidant nozzle sprays out an oxidant during working and acts on the oxidant nozzle outer wall, an oxidant nozzle flow stabilizing guide plate is arranged on the inner side of the oxidant nozzle outer wall, and the fuel nozzle sprays out fuel during working and acts between the fuel nozzle outer wall and the oxidant nozzle outer wall. A fuel nozzle steady flow guide plate is arranged between the fuel nozzle outer wall and the oxidant nozzle outer wall, a fuel inlet is located at the joint of the fuel nozzle outer wall and the fuel nozzle, the upper end of the fuel nozzle outer wall is a panel welding positioning platform, and the lower end is a midsole welding positioning platform. The stability and the manufacturing efficiency of the nozzle product in the forming process are improved.
Description
technical field [0001] The invention relates to an integrated coaxial nozzle of a liquid rocket engine and a design and manufacture method thereof, and belongs to the technical fields of structural design of a combustion device of a liquid rocket engine and metal additive manufacturing. Background technique [0002] The liquid rocket engine nozzle is the main functional component in the head injector, and its function is to mix and inject fuel and oxidant into the engine body for combustion. The existing manufacturing process is to add two nozzles of fuel nozzle and oxidizer firstly, and then weld the two parts into a coaxial nozzle by high-energy beam. This split manufacturing method not only has large welding deformation, but also affects the coaxiality of the nozzle to a certain extent. [0003] The manufacture of the steady-flow guide plate structure in the fuel and oxidant nozzles cannot be realized by the existing manufacturing process, and the addition of the steady-...
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Login to View More IPC IPC(8): F02K9/52G06F30/17G06F30/28B22F5/10B22F10/28B33Y10/00B33Y80/00
CPCF02K9/52G06F30/17G06F30/28B22F10/28B22F5/10B33Y10/00B33Y80/00
Inventor 陈金存董鹏陈帅梁晓康罗志伟李权周庆军衣凤严振宇倪江涛马丽翠王福德李曙光
Owner CAPITAL AEROSPACE MACHINERY