Torsion Element Test Bench Design

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Gick, Trevor
thesis / dissertation description
A test apparatus has been designed to apply a torque to a range of suspension products developed and sold by ROSTA USA Corporation (ROSTA). The products tested here are used in industrial applications, including vibration damping and suspension for industrial machines.The designed device takes several specifications into account. To withstand the forces applied to it, the structure of this device is created from steel with bracings to support heavily loaded areas. The device is designed with a “sled” type design so that a forklift will be able to move the sled if needed. To apply torque to the elements, a hydraulic cylinder is used that will extend and retract to apply a force on a moment arm, which then transfers the force to the tested element. For accuracy, the torque sensors used for this device are load cell type analog sensors placed on the hydraulic cylinder that measure the force. This is converted to torque in the LabView software, based on the arm length. A linear encoder is used to measure the length of the hydraulic cylinder and sends a digital signal to LabView. The program then converts this length to a displacement angle. The digital and analog signals are read through two data acquisition modules. The entire system is then connected from the data acquisition modules to a computer via USB. A user interface was created in LabView to control the system and display the output with an accuracy of 1.5%.