Door-Triggering Mechanism for Large-Scale Rapid-Decompression Experiments

Abstract

For large-scale rapid-decompression experiments, a new door-triggering mechanism is proposed for a 750 mm diameter pressure relief channel. Quick opening of the door is realized by utilizing a spring-based release mechanism to instantly convert large amounts of elastic potential energy into kinetic energy. To counteract the significant inertial effect of the high-speed door on the chamber, a flywheel-based cushioning mechanism is designed to absorb the kinetic energy of the door after opening. This carefully designed mechanism consists of the closing mechanism, energy storage unit, locking/releasing mechanism, and cushioning mechanism. Kinetic models are established to analyze the dynamic properties. Simulation results reveal that it takes approximately 280 ms for the door to open from 0° to 90°. This work can provide insights for the development of large-scale rapid-decompression equipment in the future.

Research and Verification of Key Techniques in the Simulation of Space Extremely Rapid Decompression in Millisecond

“…The quick opening mechanism adopted compressed air as the power, and the pneumatic power is converted to hydraulic power through the accumulator to push the motion of piston rod in hydraulic cylinder [13]. In cooperation with the Beijing Institute of Spacecraft Environmental Engineering, Harbin Institute of Technology completed a brand-new principle design of the quick opening mechanism, which is realized by utilizing a spring-based release mechanism to instantly convert large amounts of elastic potential energy into kinetic energy [14,15].…”