PERFORMANCE COMPARISON OF WORM GEAR AND BEVEL GEAR MECHANISMS WITH ELBOW MECHANISMS

PERFORMANCE COMPARISON OF WORM GEAR AND BEVEL GEAR MECHANISMS WITH ELBOW MECHANISMS

N Ranjith Kumar, P Rohit, K Goutham                     Dr. R Dana Sekaran (Professor, MECH), GNIT,

Department of mechanical engineering                     Ibrahimpatnam (B. tech), 501506

GNIT, Ibrahimpatnam (B. tech), 501506

ABSTRACT

This study is about a semi – automatic dish washing machine which is cost efficient and also about various mechanisms which help in transmitting power from the source which is motor to the brush through various mechanical objects like shafts bearings etc. The modelling of every object is made using design software and converted the file into STEP file to carry analysis on the 3-D model in Ansys software. The maximum speed of the motor is 1200 RPM but for safety reasons it is considered as 1400 RPM. First the parts are designed using standard calculations and found theoretical dimensional values for each part individually, based on the theoretical values the 3-D models are created in CREO software which is a designing software, the analysis is carried on the model. Three mechanisms are considered to transmit power those are elbow mechanism, worm gear mechanism and bevel gear mechanism. The results obtained in the Ansys software are compared to evaluate which mechanism is correct to make the machine work smoothly.

The present work mainly focused on finding the problem with gear-less transmission. Power transmission for shafts with the help of gears in a machine is complex while designing and manufacturing, power losses may occur due to sliding motion and the shaft orientations is very limited. In this study, the gearless power transmission is designed to transmit power at an angle of 90⁰. The system is designed in Creo 8.0 and analysed in Ansys 2022 to check the feasibility of the system. The speed analysis revealed that the speed ratio of the output shaft and input shaft remained 1:1 during the operation. During analysis the deformation has occurred at the corners of the elbow links. During fabrication different problems occurred like accuracy, number of links selected etc., so to make the machine work alternate mechanisms like worm gear and bevel gear mechanism are selected to transmit power at a right angle.

Keywords: - Design of Dishwasher, Elbow Transmission, Bevel Gears, Worm Gears, Power Transmission, Analysis.