An eight-way shunt structure with pogo vibration suppression function

Abstract

The invention relates to an eight-way shunt structure with POGO vibration suppression function, belonging to the field of launch vehicle propellant design; The sphere and 7 outlet flanges; the adapter ring is coaxially and fixedly installed at the bottom of the upper sphere; the lower sphere is coaxially and fixedly installed at the bottom of the adapter ring; the inner ring is coaxially arranged in the inner cavity of the upper sphere; Y The first outgoing side of the ring is fixedly connected with the outer wall of the inner ring; the second outgoing side of the Y-shaped ring is fixedly connected with the inner wall of the upper sphere; the looper flange is fixedly installed on the third outgoing side of the Y-shaped ring The outer wall of the side; the loose flange is coaxially limited at the top opening of the upper sphere through the Y-shaped ring; the expansion ring is coaxially fixed and installed at the axial bottom of the inner ring; 7 outlet flanges are arranged on the outer wall of the lower sphere; The invention satisfies the demand for larger volume and energy value of the pressure accumulator, and realizes uniform delivery of propellant to multiple engines.

Description

technical field [0001] The invention belongs to the field of rocket propellant design and relates to an eight-way shunt structure with POGO vibration suppression function. Background technique [0002] POGO vibration refers to the longitudinally unstable low-frequency vibration caused by the mutual coupling of the liquid rocket structure system and the dynamic characteristics of the propulsion system. In severe cases, it will lead to rocket engine shutdown, payload failure, astronauts’ physical discomfort, and even damage to the rocket body structure. The POGO suppression method of rockets at home and abroad is mainly by installing a pressure accumulator on the propellant delivery pipeline at the inlet of the engine pump, and by changing the natural frequency of the delivery system, it is separated from the natural frequency of the rocket body structure, so as to achieve the purpose of POGO suppression , Generally, a gas storage type pressure accumulator is used. When the s...

AI Technical Summary

Problems solved by technology

When the scale of the rocket becomes larger, the volume and energy value of the pressure accumulator are required to be greater. Due to the increase in the number of diaphragms, the number and length of welds in the metal diaphragm gas storage type pressure accumulator increase significantly, and the difficulty of weld defect control increases significantly. , at the same time, due to the increase in the slenderness ratio of the bellows, it is easy to lose stability after being charged, and the reliability is poor under vibration conditions

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