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Needle valve injector for variable thrust rocket engine

A rocket engine and variable thrust technology, applied in rocket engine devices, machines/engines, mechanical equipment, etc., can solve problems such as low combustion efficiency and poor propellant mixing, and achieve the effect of increasing effective stroke, simplifying design, and reducing difficulty

Active Publication Date: 2021-11-16
西安空天引擎科技有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the technical problem that the propellant in the inner ring and the propellant in the outer ring of the existing needle valve injector are poorly mixed, resulting in low combustion efficiency, the present invention provides a needle valve injector for a variable thrust rocket engine. injector

Method used

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  • Needle valve injector for variable thrust rocket engine
  • Needle valve injector for variable thrust rocket engine
  • Needle valve injector for variable thrust rocket engine

Examples

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Embodiment Construction

[0037] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention and the accompanying drawings. Apparently, the described embodiments do not limit the present invention.

[0038] The present invention proposes slotting on the moving part needle valve 3, using the central rod 4 to block the oxidant outlet passage 7 and the fuel outlet passage 8, to adjust the injection structure of the fuel and oxidant flow, and to improve the propellant of the variable thrust needle valve injector. Blending characteristics, effectively improve the combustion efficiency.

[0039] Such as figure 2 , image 3 and Figure 4 As shown, a needle valve injector for a variable thrust rocket engine of the present invention includes an upper cover 1 , a housing 2 , a needle valve 3 and a center rod 4 arranged coaxially. Among them, the same part as the existing structure is that the upper cover 1 is con...

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PUM

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Abstract

The invention belongs to a needle valve injector for a rocket engine, and provides a needle valve injector for a variable thrust rocket engine in order to solve the technical problem of low combustion efficiency caused by poor mixing of propellants in an inner ring and propellants in an outer ring in an existing needle valve injector. The outer wall of the upper section of a needle valve cooperates with the inner wall of a shell so that the needle valve can linearly move relative to the shell, the lower section of the needle valve comprises a conical section and a column section, the small end of the conical section is connected with the column section, a gap is reserved between the outer wall of the tail end of the small end of the conical section and the shell to form an annular oxidant outlet channel, and a fuel outlet channel is formed in the side wall of the column section. A center rod comprises a connecting rod and a flow control boss, the connecting rod is connected with an upper cover, the outer wall of the flow control boss cooperates with the inner wall of the column section so that the needle valve can linearly move relative to the flow control boss, a cooling groove is formed in the side wall of the flow control boss, and the oxidant outlet channel, the fuel outlet channel and the cooling groove all communicate with a combustion chamber.

Description

technical field [0001] The invention belongs to a needle valve injector for a rocket engine, in particular to a needle valve injector for a variable thrust rocket engine. Background technique [0002] The rocket engine is a device that provides power for the flight, orbit change, and attitude adjustment of the launch vehicle. In recent years, in order to reduce costs, more and more commercial aerospace companies have proposed reusable vehicle solutions. In order to achieve rocket recovery, adjustable thrust has become a necessary capability for reusable launch vehicle engines. At present, needle valve injectors are mainly used at home and abroad to realize thrust adjustment. [0003] Such as figure 1 In the existing needle valve injector, the needle valve is designed to be movable. In the process of changing the thrust, according to the change of the flow rate, it is driven by the actuator to change the injection of the inner ring propellant and the outer ring propellant a...

Claims

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Application Information

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IPC IPC(8): F02K9/52
CPCF02K9/52
Inventor 高强雍雪君林革
Owner 西安空天引擎科技有限公司
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