专利详解:在火箭发射初产生高推力,经过规定时间之后,以低推力推进的双推力式火箭发动机中,常使用内面燃烧式推进剂药柱。过去,在低燃速推进剂内侧配以与其同心的高燃速推进剂。因第一和第二推进剂是接合在一起的,显然,这两种不同的推进剂,由于物理性质不同,随着环境条件的变化,尤其是因制造或保管中温度的变化,二者之间就有产生剥离的危险。本发明为了弥补上述缺欠。提供了一种没有上述危险的推进剂药柱。在图面所示的实例中,1是第一推进剂,装填于火箭燃烧室成为一个整体,呈园筒状。在其内部对着 Patented Detailed: The rocket launch early to produce high thrust, after a specified period of time, with low thrust propulsion double-thrust rocket engine, often used inside combustion propellant grains. In the past, low-velocity propellants inside with high concen- tration propellant. Since the first and second propellants are joined together, it is clear that the two different propellants, due to their different physical properties, vary with environmental conditions, in particular due to changes in temperature during manufacture or storage, There is a danger of peeling. The present invention is to remedy the above drawbacks. A propellant cartridge is provided without the above risks. In the example shown in the figure, 1 is the first propellant, packed in the rocket combustion chamber as a whole, in the shape of a cylinder. In its internal confrontation