High temperature and high pressure sealing window used for constant volume combustion bomb

Abstract

The invention discloses a high temperature and high pressure sealing window used for a constant volume combustion bomb. The high temperature and high pressure sealing window used for the constant volume combustion bomb comprises a flange end cover, wherein the external side of the flange end cover is provided with an external boss; the flange end cover and a constant volume combustion bomb body are fixed through installing bolts; glass is arranged inside the flange end cover; the external side of the glass is axially limited through a first sealing step surface which is arranged inside the flange end cover; the first sealing step surface is provided with a groove which is provided with an O type ring; the inner side of the glass is axially limited through a blocking ring which is fixed on a second sealing step surface which is arranged inside the flange end cover through countersunk bolts to compress the glass; and a graphite gasket is arranged between the blocking ring and the glass. According to the high temperature and high pressure sealing window used for the constant volume combustion bomb, the sealing is performed on the flange end cover and the constant volume combustion bomb body after the glass and the flange end cover are arranged into a whole, the glass is one-time installed, and frequent detachment is not needed, so that the problems that the sealing fails and the glass is easy to crush are solved. The gas expansion pressure inside a chamber enables pre-tightening force for compressing the glass to be enhanced to achieve the effect of self-tight sealing, so that the sealing of the high temperature and high pressure gas of the constant volume combustion bomb is achieved.

Description

technical field [0001] The invention relates to the technical field of internal combustion engine combustion, in particular to a sealing window for constant-volume incendiary bombs. Background technique [0002] The constant-volume incendiary bomb has a simple structure and low construction cost, and can easily study the influence of a single parameter change on the combustion process; an optical quartz glass window is provided, and the internal flame propagation can be observed in combination with high-speed photography technology; while the gasoline engine burns at top dead center When the combustion speed is fast, it is considered to be a constant volume combustion. Therefore, constant volume incendiary bombs are widely used in the technical field of gasoline engine combustion. In China, Xi'an Jiaotong University, Tianjin University, Beijing University of Technology and Beijing Institute of Technology have used incendiary bombs to carry out research in related fields suc...

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Problems solved by technology

[0004] The invention aims to solve the technical problems of poor sealing and easy breakage of the existing constant volume incendiary bomb window, and provides a high temperature and high pressure sealing window for constant volume incendiary bombs. As a whole, the flange end cover and the projectile body are sealed, and the glass is installed at one time without frequent disassembly, which avoids the problems of seal failure and easy crushing of the glass, and the gas expansion pressure in the cavity increases the preload of the compressed glass force, to achieve the effect of self-tightening seal, and realize the sealing of high temperature and high pressure gas of constant volume incendiary bomb

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