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Design, Analysis and Experimental Study of Worm and Worm Gear Pair for Plug Valve Application

  1. Abhijeet P. Shah
  2. Amey Gaurvadkar

Abstract

The present work deals with the design procedure, load carrying capacity, mathematical modelling,analysis of worm and worm gear for plug valve application. The plug valves are used in various fluidservices applications. It performs well in slurry applications. It is also used in air, gaseous servicesand oil piping systems and a like applications. In plug valve the main and important function of theworm gear drive is to reliably transmit torque and rotary motion. This paper throws light onaddressing these issues by performing experimental work for finding out efficiency of worm gear forplug valve application. The contact stresses of gear tooth are regarded as contributor for the failureof the gear. Thus, the analysis for these stresses has become essential for minimizing the chances offailure. The mathematical model was developed to determine the surface stresses acting on the geartooth. The testing performance of the worm and worm wheel gear pair is depending upon the torquecarrying capacity of the gear pair at the rated speed. The torque testing set up is designed for a wormgear pair with dynamometer. Rigorous trials were conducted by the use of testing set up and readingswere used to plot a graph of torque vs speed, which gives the performance of the worm and wormwheel gear pair at the rated speed. The obtained results provide significant information for predictingthe static and dynamic performance of worm gear pair. It is observed that there is improvement inefficiency for modified worm gear pair which is used in plug valve application. As the output torqueincreases efficiency also seen to be increasing.

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