Research on On-Line Measurement Method of Seal Compression during Torque Loading of Small Solid Rocket

通过对固体小火箭加载过程中螺纹、弹簧垫圈及密封圈的受力情况进行分析，得出了加载过程中螺纹、弹簧垫圈及密封圈所受力与拧紧扭矩之间的关系，将加载过程分为四个阶段，绘制出了加载过程中的“扭矩–角度”理想曲线。通过对理想曲线每个阶段曲线的斜率进行分析，得出加载过程中开始接触密封圈位置时的角度值，计算得出密封圈压缩量。通过本方法获取密封圈压缩量不需再对固体小火箭进行测量、标记及计算，降低了劳动强度，避免了多次测量所带来的测量误差，实现了固体小火箭密封圈压缩量的在线实时精确测量。Threaded through the small solid rocket loading process for loading automatic loading device in the analysis of force of spring washer and sealing ring, the loading process of screw, spring washer and sealing ring the relation between the force and the tightening torque, loading process is divided into four stages, draw the “torque angle during the loading process of” idea curve. Through the analysis of the slope of the ideal curve of each stage of the curve, that began to contact the sealing ring position when the angle value of the loading process, calculate the sealing ring the amount of compression. Obtain the sealing ring compression does not need to measure the small solid rocket through this method, marking and calculation, reduces the labor intensity, and avoids repeated measurement error caused by the real. Online and real-time measurement is a small solid rocket is sealed compression. The method of the invention can be used as criterion of rockets tightening detection.