Double-flow adjustable rotational flow pintle injector and liquid rocket engine

The invention discloses a double-flow adjustable rotational flow pintle injector and a liquid rocket engine, and relates to the technical field of liquid rockets, the double-flow adjustable rotational flow pintle injector comprises a combustion chamber base body provided with a first cavity, a second cavity and a third cavity; a partition plate for partition is arranged between the first cavity and the second cavity, a second propellant inlet is formed in the second cavity, and a second propellant outlet is formed between the second cavity and the third cavity; the pintle column section is fixedly connected with the cover plate of the first cavity; a first propellant inlet is formed in the side, extending out of the combustion chamber base body, of the pintle column section, a plurality of spiral channels are formed in the pintle column section, a plurality of first propellant outlets a are annularly formed in the outer wall of the side, extending into the third cavity, of the pintle column section, and a fir