理想元件 -----阻尼器 Door Cylinder Air chamher Damping Door adjustmen Door frame attachment screw Pneumatic door closer Orifices Outer cylinder Inner cylinder 气动闭门器 (piston) Air flow during Spring compression Cylinder Piston Piston O-ring rod seal Cylinder Door frame Shock absorber("oleo strut") attachment point 吸振器(“黄油支柱”) School of Mechanical Engineering ME369-lecture 2.1 Shanghai Jiao Tong University Fall 2015 元件连接一弹簧串并联(in Series/Parallel) → K K K M X2 →5 KEQ School of Mechanical Engineering ME369-lecture 2.1 Shanghai Jiao Tong University Fall 2015 33 BE315-Lecture 2.1 Fall 2011 ME369-lecture 2.1 Fall 2015 School of Mechanical Engineering Shanghai Jiao Tong University Shock absorber (“oleo strut”) 吸振器（“黄油支柱”） Pneumatic door closer 气动闭门器 理想元件-----------阻尼器 BE315-Lecture 2.1 Fall 2011 ME369-lecture 2.1 Fall 2015 School of Mechanical Engineering Shanghai Jiao Tong University 元件连接—弹簧串并联（ in Series/ Parallel）