Bidirectional adjustable pintle type injector and liquid rocket engine

An injector and adjustable technology, which is applied in the direction of rocket engine devices, machines/engines, combustion engines, etc., can solve problems such as thrust instability, rocket performance degradation, single adjustment structure, etc., and achieve the effect of simple structure

Active Publication Date: 2022-08-05
XI AN JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the adjustment structure of the existing pintle injector is relatively simple, and most of them realize the change of the injection flow rate of the oxidant in the inner ring by unidirectionally adjusting the opening of the pintle. Large adjustments, once the central pintle works abnormally, it is prone to thrust instability, resulting in a decline in rocket performance

Method used

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  • Bidirectional adjustable pintle type injector and liquid rocket engine
  • Bidirectional adjustable pintle type injector and liquid rocket engine
  • Bidirectional adjustable pintle type injector and liquid rocket engine

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Embodiment Construction

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] In the description of the present invention, it should be understood that the terms "center", "portrait", "horizontal", "top", "bottom", "front", "rear", "left", "right", " The orientation or positional relationship indicated by "vertical", "horizontal", "top", "bottom", "inside", "outside", "one side", "one end", "one side", etc. The orientation or positional relationship is only for the convenience of describing the present inventio...

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Abstract

The invention discloses a two-way adjustable pintle type injector and a liquid rocket engine. The injector comprises an injection panel, an injector shell connected with the injection panel, a needle valve for isolating fuel and an oxidizing agent, a fixed pintle and a movable pintle top cap, wherein the fixed pintle and the movable pintle top cap form an oxidizing agent inner ring channel together with the needle valve; the telescopic mechanism is used for adjusting the opening gap of the nozzle; an oxidant injection port is formed in the top end of the center of the injector shell, and a fuel injection port is formed in the outer side of the injector; an axial fuel nozzle is formed between the inner side of the injection panel and the outer surface of the needle valve, a radial oxidant nozzle is formed between the inner surface of the needle valve and the outer surface of the pintle top cap, and the two propellants are subjected to mixed combustion through the nozzles in different directions; the opening size of the nozzle is adjusted through the telescopic mechanism, the mixing ratio of the two propellants can be adjusted conveniently, therefore, real-time regulation and control of the rocket thrust are achieved, and meanwhile the injector has the advantages of being simple in structure and low in cost.

Description

technical field [0001] The invention belongs to the technical field of liquid rocket engines, and relates to a two-way adjustable pin-bolt injector, which can be used for a liquid rocket orbit control engine with variable thrust. Background technique [0002] The injector is one of the important components of the liquid rocket engine, which has an important influence on the atomization combustion effect of the propellant and the performance of the engine. As a new type of injector with simple structure, convenient adjustment and reliable performance, the needle-bolt injector has received extensive attention. However, the adjustment structure of the existing needle-bolt injector is relatively simple, and most of them realize the change of the injection flow rate of the oxidant in the inner ring by adjusting the opening of the needle-bolt in one direction. Significant adjustment, once encountering abnormal operation of the center pin, it is prone to thrust instability, result...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02K9/52F02K9/60F02K9/58
CPCF02K9/52F02K9/60F02K9/58Y02T10/30
Inventor 唐桂华张国栋邢瑞萍
Owner XI AN JIAOTONG UNIV
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