An ignition device for spraying constant volume incendiary bombs

Abstract

The invention discloses an ignition device for spraying constant-volume incendiary bombs, which comprises a positioning sleeve (4), an outer hexagonal bolt head (2) made of polytetrafluoroethylene and a tungsten needle ( 1); wherein, one end surface of the outer hexagonal bolt head (2) is provided with a coaxially arranged cylinder, the circumferential direction of the cylinder is the threaded portion of the bolt head (3), and two bolts with a set angle The tungsten needles (1) pass through the outer hexagon bolt heads (2), and the two tungsten needles (1) are positioned and fixed by several positioning sleeves (4) arranged at intervals. In the present invention, the opposed electrodes in the traditional constant volume incendiary bomb are changed to the oblique arrangement on the same side, and the fixing and distance control of the electrodes are carried out by using the mounting bolt heads made of polytetrafluoroethylene and the heat-resistant and insulating positioning sleeves, thereby overcoming The traditional opposed ignition needle ignition method is prone to disadvantages such as vibration and damage when it is applied to spray bombs.

Description

technical field [0001] The invention belongs to the technical field of engine spray combustion control, and in particular relates to an ignition device used for spraying constant volume combustion bombs. Background technique [0002] The constant volume combustion bomb (CVCB) is an experimental device mainly used to simulate the combustion process of the internal combustion engine near the top dead center (TDC) of the piston. The structure of the constant volume incendiary bomb is relatively simple, and the volume of the combustion chamber is fixed, which can withstand higher temperature and pressure. There is no compression process during actual operation, but the thermodynamic parameters of the mixture are pre-set, and the ignition is directly ignited through the built-in ignition needle. In addition to the advantages of simple structure and convenient adjustment of thermodynamic parameters of the mixture, constant volume incendiary bombs are generally equipped with obser...

AI Technical Summary

Problems solved by technology

However, LIPI has higher requirements on equipment conditions, the system is more complicated, and the cost is also higher

[0005] The ignition device is essential to carry out the research on the combustion characteristics of fuel spray on the spray constant volume incendiary bomb, and the air flow inside the bomb guided by the spray process is very obvious. After the spray combustion process, the internal flow of the bomb The field movement is violent. If the traditional opposed ignition pin ignition method is used, the ignition pin is prone to vibration, deformation, or even broken damage. The increase in the electrode spacing after deformation will further lead to unstable ignition.

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