| 摘要 |
PURPOSE:To improve vibro-isolating effect by making resonance frequency of liquid in an orifice to a value obtained by multiplying the objective resonance to be damped frequency by {1/(1+md/M1)} (md: mass of equivalent movable fluid of liquid in an orifice, M1: mass of a vibrating body). CONSTITUTION:A liquid chamber 14 is formed with its bottom open in an elastic body 13 stuck between lower frame bodies 11, 12, and the opening bottom is closed by a dashboard 16 with an orifice 15. The outside of the dashboard 16 is covered with a diaphragm 17, and an auxiliary chamber 18 is composed between the diaphragm 17 and the dashboard 16. Also, an air chamber 20 is formed between the outside of the diaphragm 17 and a cover 19 for the diaphragm 17. And, resonance frequency of liquid in an orifice is made to be a value or an approximate value obtained by multiplying the objective resonance frequency to be damped by {1/(1+md/M1)} (md: mass of equivalent movable fluid of liquid in an orifice, M1: mass of a vibrating body). |
