Mortar shell propellant structure suitable for cast propellant

Abstract

This invention relates to a mortar grenade propellant structure suitable for cast propellant charges, comprising a projectile body, a sealing ring, and a propellant funnel. The propellant funnel is screwed into the projectile body via a threaded connection, and a sealing ring is provided on its contact surface with the projectile body. A propellant channel is located at the center of the propellant funnel. An annular air reservoir is located below the threaded connection point between the projectile body and the propellant funnel, with a threaded connection at the upper end and a clearance fit between the lower end and the propellant funnel. Vent holes are also provided around the propellant channel at the center of the propellant funnel, communicating with the projectile body. Compared with existing technologies, this invention controls the air pressure in the air reservoir at the threaded connection point of the propellant funnel and the projectile body by rationally designing the ratio of the propellant flow rate injected into the projectile body to the air displacement within the projectile body, thereby preventing propellant from seeping into the threaded connection.

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