Simulation and Experimental Research for Piping Damper with Plunger-type Accumulator

• Published in: Journal of marine science and application Vol. 9; no. 3; pp. 274 - 279
• Main Authors: Luo, Xiao-hui, Hu, Jun-hua, Wang, Xiao-bin, Niu, Zi-hua
• Format: Journal Article
• Language: English
• Published: Heidelberg Harbin Engineering University 01.09.2010
• Subjects: Electrical Machines and Networks; Engineering; Geotechnical Engineering & Applied Earth Sciences; Machinery and Machine Elements; Offshore Engineering; Power Electronics; Research Papers; 减振器; 弹簧刚度; 柱塞式; 活塞式蓄能器; 管道振动; 间隙密封; low speed resistance; plunger-type accumulator; impact displacement; piping damper; locking speed
• ISSN: 1671-9433; 1993-5048
• DOI: 10.1007/s11804-010-1007-4

It can be beneficial to reduce vibrations in shipboard piping, so the authors designed a new kind of piping damper with a plunger-type accumulator. Special requirements for the piping damper included low impact displacement, low speed, as well as an appropriate locking speed. Inside the damper, a plunger-type accumulator was installed and on the outside of the piston rod, a tube with exposed corrugations was added. Between the piston and the cylinder, a clearance seal was added. Using mathematical modeling, the effects of the dynamic performance of the damper＇s impact displacement on vibrations were observed. Changes to the clearance between the piston and the cylinder, the stiffness of the spring in the accumulator, the throttle valve size, and locking speed resistance of the damper were respectively simulated and studied. Based on the results of the simulation, dampers with optimal parameters were developed and tested with different accumulator spring stiffnesses and different throttles. The simulation and experimental results showed that parameters such as seal clearance between piston and cylinder, accumulator spring stiffness and throttle parameters have significant effects on the damper＇s impact displacement, low speed resistance and locking speed.