Research on micro-leakage performance of the rubber seal

Abstract

For the manned International Space Station, the more stringent requirements of the leakage performance of the rubber seal, which is located in it, is presented. The leakage is caused by the small leakage paths between contact pairs of the rubber seal. Therefore, it is necessary that the micro-leakage performance analysis between interfaces of the rubber seal is carried out. Based on this, the finite element model (FEM) of macroscopic contact performance analysis of the rubber seal is established first, and the macroscopic contact pressure and contact width of the rubber seal are calculated by the model. Then, the micro-leak path model is constructed based on the contact width and surface micro-structure, and the cross-sectional area of the micro-leakage path is obtained, when the contact pressure is acted on the model. Therefore, the fluid flow states in the micro-leakage path are determined, and the flow conductance and the seal leakage rate of rubber seal are all calculated. Finally, the micro-leakage model of the rubber seal is modified to improve the theoretical calculation accuracy by the experiment.

CFD Analysis on the Diffusion and Accumulation Characteristics of Microleakage LPG in an Integrated Stove

“…Of which, leakage source 1 (gas-inlet 1) is placed at the threaded joint of the gas piping below the gas stove baffle in the lower cavity, and leakage source 2 (gas-inlet 2) is placed at the joint of the ejector above the gas stove baffle in the upper cavity (as shown in Figure b). The abovementioned locations serve as the joints of the gas piping, where existing rubber sealing rings may leak after long-term use due to aging; therefore, these locations are at high risk of leakage. , Moreover, in China, some illegal LPG stations would adulterate dimethyl ether into LPG for profiteering, which is corrosive to rubber sealing materials and accelerates the aging of rubber sealing rings, thus finally aggravating the hidden danger of gas leakage. − In addition, the placement of the leakage sources below and above the baffle of the gas stove also facilitates the study of the effect of the location of the leakage source on the diffusion and accumulation of microleakage LPG.…”

P‐13.1: An optimization scheme for conduction of VA type narrow border product

“…perfect, there are still some problems to be solved in narrow bezel products. [1][2] In order to develop products with narrower borders, the B19 factory investigated the major technical solutions in the industry, including technology of Au Dot, technology of Au line, and Au in seal & extremely narrow adhesive width technology solutions. B19 itself is a VA display process, using technology of Au in seal.…”