Liquid rocket engine and pintle injector thereof

An injector and needle bolt technology, which is applied in the field of liquid rocket engines and needle bolt injectors, can solve the problems of low reliability, easy damage, affecting the operation of the engine, etc., and achieves low combustion performance, good thermal protection, and reliability. high sex effect

Active Publication Date: 2021-04-06
NAT UNIV OF DEFENSE TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the pintle injector protrudes into the combustion chamber, an obvious problem with the pintle injector is that the head of the pintle injector will be easily damaged due to the erosion of high-temperature gas, which will affect the normal operation of the engine.
However, in the existing solutions for preventing the head of the pintle from being corroded by high-temperature gas, the thermal protection efficiency is low, and the combustion performance or stability of the propellant will be reduced, and the reliability is low.

Method used

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  • Liquid rocket engine and pintle injector thereof
  • Liquid rocket engine and pintle injector thereof
  • Liquid rocket engine and pintle injector thereof

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Embodiment Construction

[0025] In order to make the above objects, features and advantages of the present invention more comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described here, and those skilled in the art can make similar improvements without departing from the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0026] The terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, the features defined as "first" and "second" may explicitly or ...

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Abstract

The invention relates to a liquid rocket engine and a pintle injector thereof. The pintle injector comprises a pintle and a liquid film forming piece, the pintle is provided with an internal flow channel extending in the axial direction of the pintle, one end of the pintle is a head used for extending into a combustion chamber, the head is of an inwards-concave structure concaved towards the interior of the pintle, and a through hole communicating with the internal flow channel is formed in the deepest position of the head; and the liquid film forming piece comprises a liquid film forming part which is arranged outside the internal flow channel and is opposite to the through hole, a flow guide channel is formed between the liquid film forming part and the outer wall of the head, and the flow guide channel is used for enabling a liquid film to be diffused on the outer wall of the head with the through hole as the center. The liquid rocket engine and the pintle injector thereof have the characteristic of high reliability.

Description

technical field [0001] The invention relates to the technical field of injectors, in particular to a liquid rocket engine and a pintle injector thereof. Background technique [0002] The liquid rocket engine converts the chemical energy in the propellant into kinetic energy through combustion, and is an indispensable power device for space transportation. In a liquid rocket engine, the liquid propellant enters the combustion chamber through the injector, and then the liquid oxidant and fuel are broken into droplets, evaporated into a gaseous state under high temperature conditions, and then undergo a chemical reaction to produce high-temperature gas, which is ejected through the nozzle Generate thrust. The injector determines the velocity, distribution and atomization of the propellant into the combustion chamber and therefore has a major impact on the performance of the engine. [0003] At present, pintle injectors have been widely used in liquid rocket engines because of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K9/52
CPCF02K9/52
Inventor 成鹏梁涛白晓曹鹏进张彬李清廉吴继平张家奇
Owner NAT UNIV OF DEFENSE TECH
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