Design and test of annular discharge orifice of shock transmission unit

Abstract

The annular discharge orifice is a key parameter for the design of a shock transmission unit (STU). The proper dimension of the annular discharge orifice can make the stiffness difference of STU maximum in different conditions. Making use of three laws of fluid mechanics, the mathematical model for designing annular discharge orifice was developed. The STUs were subjected to the slow movement test, the fast movement test and the simulated dynamic test. During the slow movement test, the resistance force does not exceed 10% of the nominal rated force; during the simulated dynamic test, the deflection between the point of zero load and the point of maximum load does not exceed 12 mm, and the deflection during the sustained load portion of the test does not exceed 12 mm; during the fast movement test, the force can maintain the nominal rated force. The validity of the mathematical model is verified by these testing, and the mathematical model can instruct the design of annular discharge orifice of STU.

Keywords

Shock transmission unit silicone-based putty annular discharge orifice design test

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