Candidate: Cristiano Schwartz
Program: UFSC / POSMEC
Date: March, 2004
Advisor: Victor Juliano De Negri
Abstract: This work deals with the theoretical-experimental study of a end position cushioning device which uses auto-adjustable stroke in hydraulical cylinders. Specifically, the geometry of the bush, used to provide the cushioning effect, is investigated. The hydraulical cylinder, with the respective device, was supplied by the company Bosch Rexroth Ltda., which keeps partnership with the Laboratory of hydraulical Systems and Pneumatic – LASHIP, of the Department of Engineering Mechanics of the Federal University of Santa Catarina. The work presents two devices of end position cushioning devices, conventional considered one and the auto-adjustable one, which is the main focus of the study, being also discussed both principle functioning. The importance of the auto-adjustable device is its manufacturing and assembling simplicity, as well as a low cost if compared to other devices or methods of end position cushioning device. A nonlinear model is generated and it is used to achieve the theoretical results through numerical simulation, where some physical phenomena are inserted, once this phenomena has significant influence in the hydraulical component performance. Using a test bench developed to test the end position cushioning device in hydraulical cylinders, the static and dynamic models of the auto-adjustable device are validated. In turn, the theoretical results are analyzed and compared with the experimental results. The results analysis allows the identification and the determination of main parameters influence. Considering this fact it is intended to make use of this model as a design tool to end position cushioning devices.
SCHWARTZ, C. Modelagem e análise de um dispositivo de amortecimento de fim de curso auto-ajustável para cilindros hidráulicos. 2004. 119 p. Dissertação (Mestrado em Engenharia Mecânica). Universidade Federal de Santa Catarina, Florianópolis.