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Pressurization gas cylinder arrangement method in rocket oxygen tank cold helium pressurization system

A rocket oxygen tank and pressurization system technology, applied in the direction of aerospace vehicle propulsion system devices, etc., can solve the problems of no cold helium pressurization technology patent, lack of cold helium pressurization technology, etc., to improve the rocket carrying capacity and reduce the increase The effect of the amount of helium used for pressure and high safety and reliability

Inactive Publication Date: 2017-05-10
SHANGHAI JIAO TONG UNIV +1
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AI Technical Summary

Problems solved by technology

[0004] my country is developing a large-thrust liquid oxygen kerosene engine, and the cold helium pressurization technology compatible with liquid oxygen is advanced to a certain extent, but at present, there is a lack of cold helium pressurization technology for cylinders placed in liquid oxygen tanks in related fields in China. There is also no related patent for cold helium pressurization technology compatible with liquid oxygen

Method used

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  • Pressurization gas cylinder arrangement method in rocket oxygen tank cold helium pressurization system
  • Pressurization gas cylinder arrangement method in rocket oxygen tank cold helium pressurization system
  • Pressurization gas cylinder arrangement method in rocket oxygen tank cold helium pressurization system

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Embodiment 1

[0026] A method for arranging pressurized gas cylinders in a cold helium pressurized system of a rocket oxygen tank, such as Figure 1-Figure 3 As shown, 16 cold helium cylinders are arranged in rows in the inner cylinder section of the oxygen box, and the 16 cold helium cylinders are arranged in 3 rows, and the number of cold helium cylinders in each row is 5, 6, and 5 respectively. The 16 cold helium cylinders 2 also form a layered arrangement, with a total of 6 floors. There are 3 cold helium cylinders 2 on each of the lower 5 floors, and the top cold helium cylinder 2 contains 6 cold helium cylinders. on the column of bottle 2. 3 cold helium cylinders 2 on each floor are 60° apart on the oxygen box 1 circumference. The plane at the center of the bottom three cold helium cylinders 2 is 300mm from the rear equator of the oxygen box 1. The interval between the two layers of cold helium cylinders 2 connected is 678mm. The cold helium cylinder 2 is arranged close to the wall...

Embodiment 2

[0030] The specific steps of the cold helium cylinder filling process are as follows:

[0031] 1. Before the rocket is launched, the filling of liquid oxygen in the oxygen tank 1 is completed, and the initial temperature of the liquid oxygen is 90K;

[0032] 2. The cold helium cylinder 2 starts to fill with helium, the filling temperature of helium is 80K, and the filling flow rate is 0.02kg / s;

[0033] 3. The cold helium cylinder 2 is filled with helium to 23MPa, and the helium is continuously replenished to maintain 23MPa during parking.

[0034] According to the simulation calculation, under the column arrangement, the cold helium cylinder reaches 23MPa after 2800s, and it takes 3200s for the temperature and pressure inside the cylinder to stabilize. The maximum temperature of the cylinder is 93.71K, and the maximum heat transfer between the cylinder and liquid oxygen is 4222W .

Embodiment 3

[0036] The specific steps of the pressurization process are as follows:

[0037] 1. The pressure annunciator detects the pressure of the air pillow in the oxygen tank 1. When the pressure of the air pillow is lower than the rated value, the controller opens the solenoid valve on the booster pipeline, and the low-temperature and high-pressure helium comes from 16 cold helium cylinders 2 connected in parallel. Output, helium flow rate 0.26kg / s;

[0038] 2. Helium is decompressed through the pressure reducer, and the throttle coil controls the flow;

[0039] 3. Helium enters the heater and heats up to about 500K;

[0040] 4. The decompressed and heated helium enters the air pillow of the oxygen box 1 for pressurization.

[0041] According to the simulation calculation, the pressure in the oxygen tank is basically maintained at 0.32MPa in view of the row-like arrangement of gas cylinders. The pressure fluctuates greatly at the beginning, and then gradually stabilizes; the liquid...

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Abstract

The invention relates to a pressurization gas cylinder arrangement method in a rocket oxygen tank cold helium pressurization system. 16 cold helium gas cylinders are arranged in an inner barrel section of an oxygen tank in lines. The 16 cold helium gas cylinders are arranged in 3 lines, and the numbers of the cold helium gas cylinders in the 3 lines are 5, 6 and 5. The 16 cold helium gas cylinders are further arranged in a layered manner. The 3 cold helium gas cylinders on each layer are 60 degrees away from one another on the circumference of the oxygen tank. The plane where the center position of the 3 cold helium gas cylinders on the bottom layer is located is 300 mm away from a rear equatorial plane of the oxygen tank. The interval of the cold helium gas cylinders on every two adjacent layers is 678 mm. Compared with the prior art, the arrangement mode and the number of the cold helium gas cylinders in the liquid oxygen tank are reasonably designed, under the condition that normal work of the pressurization system is guaranteed, the dead weight of the pressurization system can be reduced, meanwhile, the pressurization use helium amount can be reduced, so that the rocket carrying capacity is improved, and meanwhile the safety and reliability are relatively high.

Description

technical field [0001] The invention belongs to the technical field of booster conveying system of launch vehicle and low-temperature engineering, and in particular relates to a method for arranging pressurized gas cylinders in a cold helium booster system of a rocket oxygen tank. Background technique [0002] The cold helium pressurization system is one of the key technologies of the cryogenic liquid propulsion system. The system usually uses helium as the pressurization medium, and the helium cylinder is placed in the liquid oxygen tank. The low-temperature and high-pressure helium enters the oxygen box air pillow after decompression and heating, and is used to pressurize the oxygen box to ensure Pressure requirements at the engine pump inlet. Cold helium pressurization can reduce the weight of the pressurization system, reduce the amount of helium used for pressurization of normal temperature cylinders, and improve the rocket's carrying capacity; at the same time, the ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B64G1/40
Inventor 王承耑锐巨永林陈煜程光平何鹏张亮
Owner SHANGHAI JIAO TONG UNIV
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