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Injector for liquid engine and liquid engine

A technology of injectors and engines, which is applied in the direction of machines/engines, rocket engine devices, mechanical equipment, etc., can solve problems such as injector fires, threats to the safety of liquid engines, mixing, etc., and achieve the effect of improving safety

Active Publication Date: 2019-12-27
SHAANXI LANDSPACE TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
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AI Technical Summary

Problems solved by technology

[0003] Existing injectors used in liquid rocket motors do not seal well
Therefore, on the one hand, when the liquid engine is working, it may cause leakage of propellant
On the other hand, the propellant leaked from different parts of the injector will mix with each other, causing the injector to catch fire or explode, seriously threatening the safety of the liquid engine

Method used

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  • Injector for liquid engine and liquid engine
  • Injector for liquid engine and liquid engine
  • Injector for liquid engine and liquid engine

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Embodiment Construction

[0020] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and through specific implementation methods. Spatially relative terms such as "below", "beneath", "under", "lower", "above", "on", "higher", etc. are used to facilitate description to explain the relative The orientation of two elements means that these terms are intended to encompass different orientations of the device in addition to orientations other than those shown in the figures. In addition, for example, "one element is on / under another element" may mean that two elements are in direct contact, or that there are other elements between the two elements. In addition, terms such as "first", "second", etc. are also used to describe various elements, regions, sections, etc. and should not be taken as limitations. Similar terms refer to similar elements throughout the description.

[0021] The liquid engine described below in this applicatio...

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Abstract

The invention discloses an injector for a liquid engine and the liquid engine. The injector comprises a shell, a body part, a needle valve and a center rod, wherein a first sealing device is arrangedbetween the shell and the needle valve; a second sealing device is arranged between the needle valve and the body part; and a cavity formed by the shell, the needle valve and the body part is dividedinto two cavity bodies, so that a propellant leaking from the first sealing device and a propellant leaking from the second sealing device flow into the two separated cavity bodies correspondingly. Through the injector provided by the embodiment of the invention, the propellant leaking from a center channel and the propellant leaking from a bypass channel are isolated mutually, the propellants canbe protected against danger such as ignition and explosion, and the operation safety of the liquid engine is improved.

Description

technical field [0001] The invention relates to the technical field of liquid engines, in particular to an injector for liquid engines and the liquid engine. Background technique [0002] In reusable liquid rocket engines, there is often a wide range of adjustments to the thrust the engine produces. For example, in some liquid rocket engines, the thrust ratio of the engine reaches more than 3:1. For example, in the process of recovering the rocket, the recovery of the carrier can be realized by relying on the continuous adjustment of the engine thrust. In addition, currently used liquid propellants such as liquid oxygen kerosene, liquid oxygen methane, or liquid oxygen liquid hydrogen work at extremely low temperatures. In order to adapt to the working conditions of these low temperature propellants, a cryogenic injector is urgently needed. [0003] Existing injectors used in liquid rocket motors do not seal well. Therefore, on the one hand, when the liquid engine is work...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02K9/52
CPCF02K9/52
Inventor 陈展
Owner SHAANXI LANDSPACE TECH CO LTD
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