COMPARATIVE STUDY AND PARAMATRIC ANALYSIS OF CONVENTIONAL GEAR BOX BEARINGLESS GEAR BOX FOR THE MACHINE TOOL

Abstract

The inefficiency of gear box of a machine tool is a serious problem as it increases maintenance cost and also affects the reputation of a firm. Hence its life has to be increased and should be made more reliable. The work to be done here is to find, rectify the causes of failure of present gear box for Double disc surface grinding machine thereby improving the life of it. Also bearing failure which is also seen a prime cause of failure in present gear box needs to be reduced. The alternative for such problem is bearingless gearbox; which is achieved by either active or passive magnetic bearings. The benefits of a bearingless gear box are reduced maintenance and improved reliability, less lubrication requirements, precise peak torque transmission, inherent overload protection, physically isolated input and output shafts, misalignment tolerance, and low acoustic noise and vibration etc. So to reduce the problem of noise, backlash and bearing failure of present gear box, bearingless gear box will be effective. Analysis of the current gear box is done and modification is proposed. There will be two benefits out of it; the present errors will be solved and a modified design/arrangement will be available for the same gear box. This paper illustrates the approach for solving the problem of noise and backlash which led to the direction of using magnetic bearings.