Fatigue life test device and method for metal membrane of storage tank for spacecraft propellants
A propellant storage tank and metal diaphragm technology, which is applied in the field of fatigue life test equipment, can solve the problems that the fatigue life of the metal diaphragm storage tank diaphragm cannot be satisfied, and achieve the effect of shortening the test period and improving the test efficiency
Active Publication Date: 2018-10-09
BEIJING SPACE TECH RES & TEST CENT
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Problems solved by technology
At the same time, in order to reduce the number of test sub-samples, more than 8 times the life verification on the ground is often required. Therefore, the total duration of the fatigue life test of a single tank diaphragm will reach several years, which is obviously unacceptable for engineering development.
It can be seen that the conditions for the periodic expansion and contraction of the propellant volume created by electric heating cannot meet the requirements for quickly obtaining the fatigue life of the diaphragm of the metal diaphragm tank
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[0047] In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings that are used in the embodiments. Apparently, the drawings in the following description are only some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to these drawings without creative efforts.
[0048] When describing the embodiments of the present invention, the terms "vertical", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", " The orientation or positional relationship expressed by "horizontal", "top", "bottom", "inner" and "outer" is based on the orientation or positional relationship shown in the relevant drawings, which are only for the convenience of describing the present invention and simplifying the description, and It is not to indicate or imply that the device or element referred to must have a particu...
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The invention relates to a fatigue life test device and method for a metal membrane of a storage tank for spacecraft propellants. The fatigue life test device comprises a propellant storage tank, a pressure monitoring system, a drive compressing device, a pipeline and a valve component; the propellant storage tank includes an upper half ball and a lower half ball which are of splittable structure;the valve component includes a first stop valve and a second stop valve; the pipeline includes a first pipeline, a second pipeline and a third pipeline; the first stop valve is arranged on the firstpipeline connected to the upper half ball; the drive compressing device is arranged at the end of the second pipeline connected to the lower half ball; the second stop valve is arranged on the third pipeline communicated with the second pipeline; the pressure monitoring system is connected to the second pipeline. The fatigue life test device and method according to the invention allow fatigue lifeof the metal membrane of the spacecraft storage tank to be acquired quickly and accurately.
Description
technical field [0001] The invention relates to a fatigue life test device for a metal diaphragm of a storage tank used for spacecraft propellants and a method for performing a fatigue life test on the metal diaphragm of the storage tank by using the device. Background technique [0002] The metal diaphragm tank is a commonly used spacecraft propellant tank, which can effectively eliminate the propellant sloshing caused by external disturbance. The metal diaphragm in the storage tank separates the storage tank into two parts, the air chamber and the liquid chamber. The diaphragm is squeezed by the pressurized gas in the air chamber, so that the diaphragm undergoes elastic-plastic deformation and moves in the direction of the liquid chamber. The agent is delivered to the downstream outlet of the storage tank. [0003] When the spacecraft is flying in orbit, it will face the situation that the propulsion system does not need to output propellant for a certain period of time. ...
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IPC IPC(8): G01N3/38
CPCG01N3/38G01N2203/0019G01N2203/005G01N2203/0073
Inventor 邵立民
Owner BEIJING SPACE TECH RES & TEST CENT